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Results published from a systematic review and meta-analysis find an inverse association and a dose-response link between fluoride exposure and children’s IQ scores.

Kyla W. Taylor, PhD, with the Division of Translational Toxicology at the National Institutes of Health, Morrisville, North Carolina, led the multicountry study published online in JAMA Pediatrics.

Two accompanying editorials offer two very different perspectives on how to interpret the researchers’ conclusions.
 

Study Results

The authors noted that, of the 74 studies included in the review (64 cross-sectional and 10 cohort studies), most (45) were conducted in China. Other countries included were Canada (3), Denmark (1), India (12), Iran (4), Mexico (4), New Zealand (1), Pakistan (2), Spain (1), and Taiwan (1). “Fifty-two studies were rated high risk of bias, and 22 were rated low risk of bias,” the authors stated.

Researchers found that 64 of the 74 studies reported inverse associations between fluoride exposure measures and children’s IQ scores. Their analysis of 59 studies with group-level measures of fluoride in drinking water, dental fluorosis, or other measures of fluoride exposure showed an inverse relationship between fluoride exposure and IQ (pooled standardized mean difference [SMD], −0.45; 95% CI, −0.57 to −0.33; P < .001). Of those 59 studies, encompassing 20,932 children, 47 had high risk for bias and 12 had low risk for bias.

In 31 studies that reported fluoride measurements in drinking water, a dose-response relationship was found between exposed and reference groups (SMD, –0.15; 95% CI, –0.20 to –0.11; P < .001). That relationship remained inverse when exposed groups were limited to less than 4 mg fluoride/L and less than 2 mg/L. However, the association was not seen at less than 1.5 mg/L.

In 20 studies reporting fluoride measured in urine, there was an inverse dose-response association (SMD, –0.15; 95% CI, –0.23 to –0.07; P < .001). Those inverse relationships held at levels less than 4 mg/L, less than 2 mg/L, and less than 1.5 mg/L fluoride in urine.

For perspective, in the United States, the US Public Health Service in 2015 lowered the recommended concentration of fluoride in drinking water from a range of 0.7-1.2 mg/L to 0.7 mg/L to reduce the risk for dental fluorosis while keeping its protective effect against dental caries. 

When Taylor’s team analyzed 13 studies with individual-level measures, they found an IQ score decrease of 1.63 points (95% CI, –2.33 to –0.93; P < .001) per 1-mg/L increase in urinary fluoride. Among studies with a low risk for bias, they observed an IQ score decrease of 1.14 points (95% CI, –1.68 to –0.61; P < .001). The inverse relationship remained when stratified by factors including risk for bias, sex, age, country, outcome assessment type, exposure timing (prenatal or postnatal), and exposure matrix (urinary fluoride, intake and water fluoride), the authors wrote.

The authors conclude both that inverse relationships and a dose-response association between fluoride measured in urine and drinking water and children’s IQs were found across the literature examined but also that “there were limited data and uncertainty in the dose-response association between fluoride exposure and children’s IQ when fluoride exposure was estimated by drinking water alone at concentrations less than 1.5 mg/L.”

The authors point out that, “To our knowledge, no studies of fluoride exposure and children’s IQ have been performed in the United States and no nationally representative urinary fluoride levels are available, hindering application of these findings to the US population.”
 

Editorial: Time to Reassess Systemic Fluoride

Bruce P. Lanphear, MD, MPH, with Simon Fraser University, Vancouver, British Columbia, Canada, is the lead author on an editorial that suggests these data point to the need to reassess systemic fluoride exposure.

“Their study is the largest and includes the most rigorous series of meta-analyses of fluoride ever conducted,” Lanphear and colleagues wrote. “It is time for health organizations and regulatory bodies to reassess the risks and benefits of fluoride, particularly for pregnant women and infants.”

Lanphear’s team says distinguishing between water fluoride and urinary fluoride levels is important in these results “because regulatory and public health agencies must consider total fluoride intake when assessing risks.”

Taylor and colleagues’ finding that there was no statistically significant association between water fluoride les than 1.5 mg/L and children’s IQ scores in the dose-response meta-analysis doesn’t mean fluoride is not a potential risk for lower IQ scores in fluoridated communities, they wrote. “Water fluoride concentration does not capture the amount of water ingested or other sources of ingested fluoride. In contrast, urinary fluoride is a biological measure of total fluoride exposure, including the dynamic interface between bone fluoride stores and blood fluoride.”
 

Editorial: Be Cautious About the Conclusions

Steven M. Levy, DDS, MPH, cites “major areas of concern” in the meta-analysis in his editorial.

He points to the large majority of studies in the meta-analysis that were at “high risk of bias” (47 high risk vs 12 that were low risk). He also cited information from a further look at the low-risk-of-bias studies included in the supplement.

“The studies with lower risk of bias showed a negligible effect (standardized mean difference [SMD], −0.19; 95% CI, −0.35 to −0.04) with very high heterogeneity (I2 = 87%), and a majority of publications (8 of 12) did not show a negative association between fluoride and childhood IQ,” Levy wrote. 

“Taylor et al do not adequately justify selection or omission of studies or explain or justify the calculated individual effect sizes presented in the main analysis. Also, readers are not told which studies with lower risk of bias are included in the subanalyses for water fluoride levels less than 1.5 mg/L, less than 2.0 mg/L, and less than 4.0 mg/L; therefore, readers cannot independently consider important differences across these studies.”

Levy also states that the magnitudes of the possible IQ differences are unfairly inflated. For the United Staes and most of the world, he points out, the recommended community water fluoridation level is 0.7 mg/L. Therefore, the difference between a community with low fluoride levels (about 0.2 mg/L) and one with optimal levels is about 0.5 mg/L. 

“However, Taylor and colleagues use a difference of 1.0 mg/L in their calculations, artificially doubling the estimated impact on IQ,” Levy wrote.

The meta-analysis should not affect public policy on adding fluoride to community water systems “and the widespread use of fluoride for caries prevention should continue,” Levy concluded.
 

Concerns About Quality of Studies Included

Charlotte Lewis, MD, MPH, associate professor of pediatrics at the University of Washington School of Medicine and part of Seattle Children’s Multidisciplinary Infant Nutrition and Feeding Team, Seattle, who was not involved in the meta-analysis or editorials, said that systemic fluoridation should not change based on these results, citing what she said are problems with methodology.

“There are many concerns about the quality of studies included in this meta-analysis,” Lewis said. “Although the authors claim to have separated out low-bias studies, it is important to note that many of these same studies have substantial methodological flaws.”

She said studies deemed low-bias and included in the meta-analysis “relied on multiple examiners for cognitive testing without consideration for inter-rater variation or reliability measures.” She added that “a number of the studies failed to account for maternal IQ scores, breastfeeding, lead exposure, or other factors that could affect cognitive development, further contributing to biased conclusions.”

Importantly, she said, many of the studies, including one by Rivka Green and colleagues published in JAMA Pediatrics, relied on maternal spot urinary fluoride to assess fetal exposure to fluoride. “This is not a valid way to assess fetal exposure to fluoride and including such studies in this meta-analysis has led to inappropriate conclusions because they are based on studies using a flawed exposure measure.” 

She pointed to recent longitudinal, population-based studies, including one by Jayant V Kumar and colleagues that have found no adverse impact on IQ, or other cognitive tests, of drinking water with low levels of fluoride present, comparable to US community water fluoridation standards. 

“Relative to the small convenience-sample, cross-sectional studies included in this meta-analysis, longitudinal, population-based studies are considered significantly more reliable for establishing cause and effect,” she said.
 

Fluoride Levels Different Globally

Lewis said in some parts of the world fluoride is present in the environment in much higher levels than in fluoridated water in the United States.

“There are known adverse health effects of high fluoride ingestion in these endemic regions found primarily in China, India, and Iran. This points to the importance of dose response. What is beneficial at low levels can be toxic at high levels and that appears to be the case, not surprisingly, for fluoride as well. However, at 0.7 ppm, the level of fluoride in community water fluoridation, we experience fluoride’s beneficial effects when we regularly drink optimally fluoridated water.”

“Water fluoridation is an important public health approach available and beneficial to all, even those unable to afford or access dental care,” she said. “Water fluoridation diminishes oral health disparities, and its removal threatens to worsen disparities and increased suffering from dental disease. I remain confident in the benefits and safety of community water fluoridation.”

Taylor and colleagues reported no relevant financial relationships. Lanphear reported grants from the National Institute of Environmental Health Sciences and the Canadian Institute for Health Research and having served as a nonretained and unpaid expert witness in a federal fluoride suit against the US EPA. Levy reported past grants from the National Institute of Dental and Craniofacial Research related to fluoride, dental caries, dental fluorosis, and bone development. He reported small grant funding from the Centers for Disease Control and Prevention related to fluoride, dental caries, and fluorosis. He consults for the Centers for Disease Control and Prevention and the National Institute of Dental and Craniofacial Research and serves on the National Fluoride Advisory Committee for the American Dental Association.

A version of this article appeared on Medscape.com.

Results published from a systematic review and meta-analysis find an inverse association and a dose-response link between fluoride exposure and children’s IQ scores.

Kyla W. Taylor, PhD, with the Division of Translational Toxicology at the National Institutes of Health, Morrisville, North Carolina, led the multicountry study published online in JAMA Pediatrics.

Two accompanying editorials offer two very different perspectives on how to interpret the researchers’ conclusions.
 

Study Results

The authors noted that, of the 74 studies included in the review (64 cross-sectional and 10 cohort studies), most (45) were conducted in China. Other countries included were Canada (3), Denmark (1), India (12), Iran (4), Mexico (4), New Zealand (1), Pakistan (2), Spain (1), and Taiwan (1). “Fifty-two studies were rated high risk of bias, and 22 were rated low risk of bias,” the authors stated.

Researchers found that 64 of the 74 studies reported inverse associations between fluoride exposure measures and children’s IQ scores. Their analysis of 59 studies with group-level measures of fluoride in drinking water, dental fluorosis, or other measures of fluoride exposure showed an inverse relationship between fluoride exposure and IQ (pooled standardized mean difference [SMD], −0.45; 95% CI, −0.57 to −0.33; P < .001). Of those 59 studies, encompassing 20,932 children, 47 had high risk for bias and 12 had low risk for bias.

In 31 studies that reported fluoride measurements in drinking water, a dose-response relationship was found between exposed and reference groups (SMD, –0.15; 95% CI, –0.20 to –0.11; P < .001). That relationship remained inverse when exposed groups were limited to less than 4 mg fluoride/L and less than 2 mg/L. However, the association was not seen at less than 1.5 mg/L.

In 20 studies reporting fluoride measured in urine, there was an inverse dose-response association (SMD, –0.15; 95% CI, –0.23 to –0.07; P < .001). Those inverse relationships held at levels less than 4 mg/L, less than 2 mg/L, and less than 1.5 mg/L fluoride in urine.

For perspective, in the United States, the US Public Health Service in 2015 lowered the recommended concentration of fluoride in drinking water from a range of 0.7-1.2 mg/L to 0.7 mg/L to reduce the risk for dental fluorosis while keeping its protective effect against dental caries. 

When Taylor’s team analyzed 13 studies with individual-level measures, they found an IQ score decrease of 1.63 points (95% CI, –2.33 to –0.93; P < .001) per 1-mg/L increase in urinary fluoride. Among studies with a low risk for bias, they observed an IQ score decrease of 1.14 points (95% CI, –1.68 to –0.61; P < .001). The inverse relationship remained when stratified by factors including risk for bias, sex, age, country, outcome assessment type, exposure timing (prenatal or postnatal), and exposure matrix (urinary fluoride, intake and water fluoride), the authors wrote.

The authors conclude both that inverse relationships and a dose-response association between fluoride measured in urine and drinking water and children’s IQs were found across the literature examined but also that “there were limited data and uncertainty in the dose-response association between fluoride exposure and children’s IQ when fluoride exposure was estimated by drinking water alone at concentrations less than 1.5 mg/L.”

The authors point out that, “To our knowledge, no studies of fluoride exposure and children’s IQ have been performed in the United States and no nationally representative urinary fluoride levels are available, hindering application of these findings to the US population.”
 

Editorial: Time to Reassess Systemic Fluoride

Bruce P. Lanphear, MD, MPH, with Simon Fraser University, Vancouver, British Columbia, Canada, is the lead author on an editorial that suggests these data point to the need to reassess systemic fluoride exposure.

“Their study is the largest and includes the most rigorous series of meta-analyses of fluoride ever conducted,” Lanphear and colleagues wrote. “It is time for health organizations and regulatory bodies to reassess the risks and benefits of fluoride, particularly for pregnant women and infants.”

Lanphear’s team says distinguishing between water fluoride and urinary fluoride levels is important in these results “because regulatory and public health agencies must consider total fluoride intake when assessing risks.”

Taylor and colleagues’ finding that there was no statistically significant association between water fluoride les than 1.5 mg/L and children’s IQ scores in the dose-response meta-analysis doesn’t mean fluoride is not a potential risk for lower IQ scores in fluoridated communities, they wrote. “Water fluoride concentration does not capture the amount of water ingested or other sources of ingested fluoride. In contrast, urinary fluoride is a biological measure of total fluoride exposure, including the dynamic interface between bone fluoride stores and blood fluoride.”
 

Editorial: Be Cautious About the Conclusions

Steven M. Levy, DDS, MPH, cites “major areas of concern” in the meta-analysis in his editorial.

He points to the large majority of studies in the meta-analysis that were at “high risk of bias” (47 high risk vs 12 that were low risk). He also cited information from a further look at the low-risk-of-bias studies included in the supplement.

“The studies with lower risk of bias showed a negligible effect (standardized mean difference [SMD], −0.19; 95% CI, −0.35 to −0.04) with very high heterogeneity (I2 = 87%), and a majority of publications (8 of 12) did not show a negative association between fluoride and childhood IQ,” Levy wrote. 

“Taylor et al do not adequately justify selection or omission of studies or explain or justify the calculated individual effect sizes presented in the main analysis. Also, readers are not told which studies with lower risk of bias are included in the subanalyses for water fluoride levels less than 1.5 mg/L, less than 2.0 mg/L, and less than 4.0 mg/L; therefore, readers cannot independently consider important differences across these studies.”

Levy also states that the magnitudes of the possible IQ differences are unfairly inflated. For the United Staes and most of the world, he points out, the recommended community water fluoridation level is 0.7 mg/L. Therefore, the difference between a community with low fluoride levels (about 0.2 mg/L) and one with optimal levels is about 0.5 mg/L. 

“However, Taylor and colleagues use a difference of 1.0 mg/L in their calculations, artificially doubling the estimated impact on IQ,” Levy wrote.

The meta-analysis should not affect public policy on adding fluoride to community water systems “and the widespread use of fluoride for caries prevention should continue,” Levy concluded.
 

Concerns About Quality of Studies Included

Charlotte Lewis, MD, MPH, associate professor of pediatrics at the University of Washington School of Medicine and part of Seattle Children’s Multidisciplinary Infant Nutrition and Feeding Team, Seattle, who was not involved in the meta-analysis or editorials, said that systemic fluoridation should not change based on these results, citing what she said are problems with methodology.

“There are many concerns about the quality of studies included in this meta-analysis,” Lewis said. “Although the authors claim to have separated out low-bias studies, it is important to note that many of these same studies have substantial methodological flaws.”

She said studies deemed low-bias and included in the meta-analysis “relied on multiple examiners for cognitive testing without consideration for inter-rater variation or reliability measures.” She added that “a number of the studies failed to account for maternal IQ scores, breastfeeding, lead exposure, or other factors that could affect cognitive development, further contributing to biased conclusions.”

Importantly, she said, many of the studies, including one by Rivka Green and colleagues published in JAMA Pediatrics, relied on maternal spot urinary fluoride to assess fetal exposure to fluoride. “This is not a valid way to assess fetal exposure to fluoride and including such studies in this meta-analysis has led to inappropriate conclusions because they are based on studies using a flawed exposure measure.” 

She pointed to recent longitudinal, population-based studies, including one by Jayant V Kumar and colleagues that have found no adverse impact on IQ, or other cognitive tests, of drinking water with low levels of fluoride present, comparable to US community water fluoridation standards. 

“Relative to the small convenience-sample, cross-sectional studies included in this meta-analysis, longitudinal, population-based studies are considered significantly more reliable for establishing cause and effect,” she said.
 

Fluoride Levels Different Globally

Lewis said in some parts of the world fluoride is present in the environment in much higher levels than in fluoridated water in the United States.

“There are known adverse health effects of high fluoride ingestion in these endemic regions found primarily in China, India, and Iran. This points to the importance of dose response. What is beneficial at low levels can be toxic at high levels and that appears to be the case, not surprisingly, for fluoride as well. However, at 0.7 ppm, the level of fluoride in community water fluoridation, we experience fluoride’s beneficial effects when we regularly drink optimally fluoridated water.”

“Water fluoridation is an important public health approach available and beneficial to all, even those unable to afford or access dental care,” she said. “Water fluoridation diminishes oral health disparities, and its removal threatens to worsen disparities and increased suffering from dental disease. I remain confident in the benefits and safety of community water fluoridation.”

Taylor and colleagues reported no relevant financial relationships. Lanphear reported grants from the National Institute of Environmental Health Sciences and the Canadian Institute for Health Research and having served as a nonretained and unpaid expert witness in a federal fluoride suit against the US EPA. Levy reported past grants from the National Institute of Dental and Craniofacial Research related to fluoride, dental caries, dental fluorosis, and bone development. He reported small grant funding from the Centers for Disease Control and Prevention related to fluoride, dental caries, and fluorosis. He consults for the Centers for Disease Control and Prevention and the National Institute of Dental and Craniofacial Research and serves on the National Fluoride Advisory Committee for the American Dental Association.

A version of this article appeared on Medscape.com.

Results published from a systematic review and meta-analysis find an inverse association and a dose-response link between fluoride exposure and children’s IQ scores.

Kyla W. Taylor, PhD, with the Division of Translational Toxicology at the National Institutes of Health, Morrisville, North Carolina, led the multicountry study published online in JAMA Pediatrics.

Two accompanying editorials offer two very different perspectives on how to interpret the researchers’ conclusions.
 

Study Results

The authors noted that, of the 74 studies included in the review (64 cross-sectional and 10 cohort studies), most (45) were conducted in China. Other countries included were Canada (3), Denmark (1), India (12), Iran (4), Mexico (4), New Zealand (1), Pakistan (2), Spain (1), and Taiwan (1). “Fifty-two studies were rated high risk of bias, and 22 were rated low risk of bias,” the authors stated.

Researchers found that 64 of the 74 studies reported inverse associations between fluoride exposure measures and children’s IQ scores. Their analysis of 59 studies with group-level measures of fluoride in drinking water, dental fluorosis, or other measures of fluoride exposure showed an inverse relationship between fluoride exposure and IQ (pooled standardized mean difference [SMD], −0.45; 95% CI, −0.57 to −0.33; P < .001). Of those 59 studies, encompassing 20,932 children, 47 had high risk for bias and 12 had low risk for bias.

In 31 studies that reported fluoride measurements in drinking water, a dose-response relationship was found between exposed and reference groups (SMD, –0.15; 95% CI, –0.20 to –0.11; P < .001). That relationship remained inverse when exposed groups were limited to less than 4 mg fluoride/L and less than 2 mg/L. However, the association was not seen at less than 1.5 mg/L.

In 20 studies reporting fluoride measured in urine, there was an inverse dose-response association (SMD, –0.15; 95% CI, –0.23 to –0.07; P < .001). Those inverse relationships held at levels less than 4 mg/L, less than 2 mg/L, and less than 1.5 mg/L fluoride in urine.

For perspective, in the United States, the US Public Health Service in 2015 lowered the recommended concentration of fluoride in drinking water from a range of 0.7-1.2 mg/L to 0.7 mg/L to reduce the risk for dental fluorosis while keeping its protective effect against dental caries. 

When Taylor’s team analyzed 13 studies with individual-level measures, they found an IQ score decrease of 1.63 points (95% CI, –2.33 to –0.93; P < .001) per 1-mg/L increase in urinary fluoride. Among studies with a low risk for bias, they observed an IQ score decrease of 1.14 points (95% CI, –1.68 to –0.61; P < .001). The inverse relationship remained when stratified by factors including risk for bias, sex, age, country, outcome assessment type, exposure timing (prenatal or postnatal), and exposure matrix (urinary fluoride, intake and water fluoride), the authors wrote.

The authors conclude both that inverse relationships and a dose-response association between fluoride measured in urine and drinking water and children’s IQs were found across the literature examined but also that “there were limited data and uncertainty in the dose-response association between fluoride exposure and children’s IQ when fluoride exposure was estimated by drinking water alone at concentrations less than 1.5 mg/L.”

The authors point out that, “To our knowledge, no studies of fluoride exposure and children’s IQ have been performed in the United States and no nationally representative urinary fluoride levels are available, hindering application of these findings to the US population.”
 

Editorial: Time to Reassess Systemic Fluoride

Bruce P. Lanphear, MD, MPH, with Simon Fraser University, Vancouver, British Columbia, Canada, is the lead author on an editorial that suggests these data point to the need to reassess systemic fluoride exposure.

“Their study is the largest and includes the most rigorous series of meta-analyses of fluoride ever conducted,” Lanphear and colleagues wrote. “It is time for health organizations and regulatory bodies to reassess the risks and benefits of fluoride, particularly for pregnant women and infants.”

Lanphear’s team says distinguishing between water fluoride and urinary fluoride levels is important in these results “because regulatory and public health agencies must consider total fluoride intake when assessing risks.”

Taylor and colleagues’ finding that there was no statistically significant association between water fluoride les than 1.5 mg/L and children’s IQ scores in the dose-response meta-analysis doesn’t mean fluoride is not a potential risk for lower IQ scores in fluoridated communities, they wrote. “Water fluoride concentration does not capture the amount of water ingested or other sources of ingested fluoride. In contrast, urinary fluoride is a biological measure of total fluoride exposure, including the dynamic interface between bone fluoride stores and blood fluoride.”
 

Editorial: Be Cautious About the Conclusions

Steven M. Levy, DDS, MPH, cites “major areas of concern” in the meta-analysis in his editorial.

He points to the large majority of studies in the meta-analysis that were at “high risk of bias” (47 high risk vs 12 that were low risk). He also cited information from a further look at the low-risk-of-bias studies included in the supplement.

“The studies with lower risk of bias showed a negligible effect (standardized mean difference [SMD], −0.19; 95% CI, −0.35 to −0.04) with very high heterogeneity (I2 = 87%), and a majority of publications (8 of 12) did not show a negative association between fluoride and childhood IQ,” Levy wrote. 

“Taylor et al do not adequately justify selection or omission of studies or explain or justify the calculated individual effect sizes presented in the main analysis. Also, readers are not told which studies with lower risk of bias are included in the subanalyses for water fluoride levels less than 1.5 mg/L, less than 2.0 mg/L, and less than 4.0 mg/L; therefore, readers cannot independently consider important differences across these studies.”

Levy also states that the magnitudes of the possible IQ differences are unfairly inflated. For the United Staes and most of the world, he points out, the recommended community water fluoridation level is 0.7 mg/L. Therefore, the difference between a community with low fluoride levels (about 0.2 mg/L) and one with optimal levels is about 0.5 mg/L. 

“However, Taylor and colleagues use a difference of 1.0 mg/L in their calculations, artificially doubling the estimated impact on IQ,” Levy wrote.

The meta-analysis should not affect public policy on adding fluoride to community water systems “and the widespread use of fluoride for caries prevention should continue,” Levy concluded.
 

Concerns About Quality of Studies Included

Charlotte Lewis, MD, MPH, associate professor of pediatrics at the University of Washington School of Medicine and part of Seattle Children’s Multidisciplinary Infant Nutrition and Feeding Team, Seattle, who was not involved in the meta-analysis or editorials, said that systemic fluoridation should not change based on these results, citing what she said are problems with methodology.

“There are many concerns about the quality of studies included in this meta-analysis,” Lewis said. “Although the authors claim to have separated out low-bias studies, it is important to note that many of these same studies have substantial methodological flaws.”

She said studies deemed low-bias and included in the meta-analysis “relied on multiple examiners for cognitive testing without consideration for inter-rater variation or reliability measures.” She added that “a number of the studies failed to account for maternal IQ scores, breastfeeding, lead exposure, or other factors that could affect cognitive development, further contributing to biased conclusions.”

Importantly, she said, many of the studies, including one by Rivka Green and colleagues published in JAMA Pediatrics, relied on maternal spot urinary fluoride to assess fetal exposure to fluoride. “This is not a valid way to assess fetal exposure to fluoride and including such studies in this meta-analysis has led to inappropriate conclusions because they are based on studies using a flawed exposure measure.” 

She pointed to recent longitudinal, population-based studies, including one by Jayant V Kumar and colleagues that have found no adverse impact on IQ, or other cognitive tests, of drinking water with low levels of fluoride present, comparable to US community water fluoridation standards. 

“Relative to the small convenience-sample, cross-sectional studies included in this meta-analysis, longitudinal, population-based studies are considered significantly more reliable for establishing cause and effect,” she said.
 

Fluoride Levels Different Globally

Lewis said in some parts of the world fluoride is present in the environment in much higher levels than in fluoridated water in the United States.

“There are known adverse health effects of high fluoride ingestion in these endemic regions found primarily in China, India, and Iran. This points to the importance of dose response. What is beneficial at low levels can be toxic at high levels and that appears to be the case, not surprisingly, for fluoride as well. However, at 0.7 ppm, the level of fluoride in community water fluoridation, we experience fluoride’s beneficial effects when we regularly drink optimally fluoridated water.”

“Water fluoridation is an important public health approach available and beneficial to all, even those unable to afford or access dental care,” she said. “Water fluoridation diminishes oral health disparities, and its removal threatens to worsen disparities and increased suffering from dental disease. I remain confident in the benefits and safety of community water fluoridation.”

Taylor and colleagues reported no relevant financial relationships. Lanphear reported grants from the National Institute of Environmental Health Sciences and the Canadian Institute for Health Research and having served as a nonretained and unpaid expert witness in a federal fluoride suit against the US EPA. Levy reported past grants from the National Institute of Dental and Craniofacial Research related to fluoride, dental caries, dental fluorosis, and bone development. He reported small grant funding from the Centers for Disease Control and Prevention related to fluoride, dental caries, and fluorosis. He consults for the Centers for Disease Control and Prevention and the National Institute of Dental and Craniofacial Research and serves on the National Fluoride Advisory Committee for the American Dental Association.

A version of this article appeared on Medscape.com.

Current management of children and adolescents with long COVID was the focus of various presentations at the 3rd Long COVID Congress in Berlin in November 2024. The congress aimed to facilitate in-depth discussions on recent research projects, diagnostic procedures, and therapeutic approaches to enhance care for long COVID patients. This year, the focus was on research into long COVID in children and adolescents and how to improve their care.

Uta Behrends, MD, head of the Munich Chronic Fatigue Center, Center for Pediatric and Adolescent Medicine at the Technical University of Munich, Germany, and Nicole Toepfner, MD, a pediatrician at the University Hospital in Dresden, Germany, provided an initial overview.

Prevalence Data Are Limited

Data on the incidence and prevalence of the condition in children and adolescents are limited because most studies have primarily examined adults. A 2022 Swiss study estimated that it affects between 2% and 3.5% of children and adolescents who contract COVID-19. A recent study published in JAMA involving 5367 children and adolescents found that 20% of children aged 6-11 years and 14% of adolescents met the researchers’ criteria for long COVID.

Impaired Mental Health

Initial data from the latest wave of the population-based longitudinal COPSY (Corona and Psyche) study showed that compared with their peer group children and adolescents diagnosed with long COVID exhibit significantly higher rates of psychological issues and depressive symptoms. Although no significant differences were found in anxiety levels, study leader Ulrike Ravens-Sieberer, PhD, from the University Medical Center Hamburg-Eppendorf, Germany, told the congress that those with long COVID do also report more frequent somatic or psychological health complaints and lower health-related quality of life than peers.

Addressing Data Gaps

Another study due to launch in January 2025 and run through to 2028 is the COVYOUTH data study, which aims to better understand the nature, frequency, and risk factors of COVID-related sequelae in children and adolescents.

Study centers include Ruhr University Bochum, University Hospital Cologne, the Paul-Ehrlich-Institut, and University Medical Center Hamburg-Eppendorf. Using routine data from statutory health insurance and newly developed case definitions, researchers aim to investigate:

• Psychological stress caused by COVID-19 measures 
• Post-COVID syndrome and myocarditis 
• Adverse effects of COVID-19 vaccinations 

Specialized Diagnostics and Care

The Post-COVID Kids Bavaria project offers specialized diagnostics and care for children and adolescents, including a day clinic, telemedical follow-ups, and an inpatient pain therapy module providing age-appropriate care as close to patients’ homes as possible.

MOVE-COVID is a model project for patient-focused research on long COVID and myalgic encephalomyelitis/chronic fatigue syndrome (ME/CFS) involving university pediatric hospitals in Freiburg, Heidelberg, Tübingen, and Ulm. It also aims to establish a care network across the state of Baden-Württemberg, including the establishment of long COVID outpatient clinics at social pediatric centers in the network hospitals, as well as enhanced telemedical support and standardized diagnostic and treatment protocols. “MOVE-COVID has successfully consolidated competencies and capacities in patient care, health services research, and patient-focused studies across multiple centers,” Behrends said.

Chronic Pain and Fatigue

Post-COVID syndromes in children and adolescents may feature profound fatigue, unrefreshing sleep, post-exertional malaise, cognitive dysfunction, and orthostatic intolerance and overlap with conditions such as ME/CFS. According to the German patient association Fatigatio, Berlin, research and studies for these conditions in children remain limited compared with those in adults. However, the US Centers for Disease Control estimates that around 2% of ME/CFS patients are children or adolescents, with the majority being teenagers.

Two inpatient treatment concepts, SHARK and TIGER, developed by Lea Höfel, PhD, head of the Centre for Pain Therapy for Young People and the Psychological Service at the Children’s Hospital in Garmisch-Partenkirchen, address chronic pain, fatigue, and ME/CFS in young people. These programs integrate structured breaks and flexible access to multiple therapists as needed. The TIGER program focuses on those with post-exertional malaise, while the SHARK program is designed for adolescents without this symptom. Both programs last 4.5-5 weeks and emphasize symptom reduction, education, and energy management.

Preliminary Results

SHARK included 30 participants (7 men; average age, 16 years), of whom 12 had a history of SARS-CoV-2 infection. TIGER involved 100 participants (24 men; average age, 16.7 years), of whom 32 had a SARS-CoV-2 infection as a triggering event. Other triggers included Epstein-Barr virus and other infections.

Preliminary findings from the projects indicate that optimized management with outpatient and follow-up care can yield positive, sometimes lasting effects. No significant differences between SARS-CoV-2 and other triggers emerged, but pain proved more manageable in the SHARK group than in the TIGER group, suggesting they may involve different pathological mechanisms.

Hope for Improved Outcomes

“It’s important to move away from the idea that nothing can be done,” Behrends said. This is a common attitude with children and adolescents displaying these types of symptoms, but it’s simply not true. “Even in pediatrics, we have numerous therapeutic options that may offer relief, from medication to psychosocial interventions,” she concluded.

This story was translated from Medscape’s German edition using several editorial tools, including artificial intelligence, as part of the process. Human editors reviewed this content before publication. A version of this article appeared on Medscape.com.

Current management of children and adolescents with long COVID was the focus of various presentations at the 3rd Long COVID Congress in Berlin in November 2024. The congress aimed to facilitate in-depth discussions on recent research projects, diagnostic procedures, and therapeutic approaches to enhance care for long COVID patients. This year, the focus was on research into long COVID in children and adolescents and how to improve their care.

Uta Behrends, MD, head of the Munich Chronic Fatigue Center, Center for Pediatric and Adolescent Medicine at the Technical University of Munich, Germany, and Nicole Toepfner, MD, a pediatrician at the University Hospital in Dresden, Germany, provided an initial overview.

Prevalence Data Are Limited

Data on the incidence and prevalence of the condition in children and adolescents are limited because most studies have primarily examined adults. A 2022 Swiss study estimated that it affects between 2% and 3.5% of children and adolescents who contract COVID-19. A recent study published in JAMA involving 5367 children and adolescents found that 20% of children aged 6-11 years and 14% of adolescents met the researchers’ criteria for long COVID.

Impaired Mental Health

Initial data from the latest wave of the population-based longitudinal COPSY (Corona and Psyche) study showed that compared with their peer group children and adolescents diagnosed with long COVID exhibit significantly higher rates of psychological issues and depressive symptoms. Although no significant differences were found in anxiety levels, study leader Ulrike Ravens-Sieberer, PhD, from the University Medical Center Hamburg-Eppendorf, Germany, told the congress that those with long COVID do also report more frequent somatic or psychological health complaints and lower health-related quality of life than peers.

Addressing Data Gaps

Another study due to launch in January 2025 and run through to 2028 is the COVYOUTH data study, which aims to better understand the nature, frequency, and risk factors of COVID-related sequelae in children and adolescents.

Study centers include Ruhr University Bochum, University Hospital Cologne, the Paul-Ehrlich-Institut, and University Medical Center Hamburg-Eppendorf. Using routine data from statutory health insurance and newly developed case definitions, researchers aim to investigate:

• Psychological stress caused by COVID-19 measures 
• Post-COVID syndrome and myocarditis 
• Adverse effects of COVID-19 vaccinations 

Specialized Diagnostics and Care

The Post-COVID Kids Bavaria project offers specialized diagnostics and care for children and adolescents, including a day clinic, telemedical follow-ups, and an inpatient pain therapy module providing age-appropriate care as close to patients’ homes as possible.

MOVE-COVID is a model project for patient-focused research on long COVID and myalgic encephalomyelitis/chronic fatigue syndrome (ME/CFS) involving university pediatric hospitals in Freiburg, Heidelberg, Tübingen, and Ulm. It also aims to establish a care network across the state of Baden-Württemberg, including the establishment of long COVID outpatient clinics at social pediatric centers in the network hospitals, as well as enhanced telemedical support and standardized diagnostic and treatment protocols. “MOVE-COVID has successfully consolidated competencies and capacities in patient care, health services research, and patient-focused studies across multiple centers,” Behrends said.

Chronic Pain and Fatigue

Post-COVID syndromes in children and adolescents may feature profound fatigue, unrefreshing sleep, post-exertional malaise, cognitive dysfunction, and orthostatic intolerance and overlap with conditions such as ME/CFS. According to the German patient association Fatigatio, Berlin, research and studies for these conditions in children remain limited compared with those in adults. However, the US Centers for Disease Control estimates that around 2% of ME/CFS patients are children or adolescents, with the majority being teenagers.

Two inpatient treatment concepts, SHARK and TIGER, developed by Lea Höfel, PhD, head of the Centre for Pain Therapy for Young People and the Psychological Service at the Children’s Hospital in Garmisch-Partenkirchen, address chronic pain, fatigue, and ME/CFS in young people. These programs integrate structured breaks and flexible access to multiple therapists as needed. The TIGER program focuses on those with post-exertional malaise, while the SHARK program is designed for adolescents without this symptom. Both programs last 4.5-5 weeks and emphasize symptom reduction, education, and energy management.

Preliminary Results

SHARK included 30 participants (7 men; average age, 16 years), of whom 12 had a history of SARS-CoV-2 infection. TIGER involved 100 participants (24 men; average age, 16.7 years), of whom 32 had a SARS-CoV-2 infection as a triggering event. Other triggers included Epstein-Barr virus and other infections.

Preliminary findings from the projects indicate that optimized management with outpatient and follow-up care can yield positive, sometimes lasting effects. No significant differences between SARS-CoV-2 and other triggers emerged, but pain proved more manageable in the SHARK group than in the TIGER group, suggesting they may involve different pathological mechanisms.

Hope for Improved Outcomes

“It’s important to move away from the idea that nothing can be done,” Behrends said. This is a common attitude with children and adolescents displaying these types of symptoms, but it’s simply not true. “Even in pediatrics, we have numerous therapeutic options that may offer relief, from medication to psychosocial interventions,” she concluded.

This story was translated from Medscape’s German edition using several editorial tools, including artificial intelligence, as part of the process. Human editors reviewed this content before publication. A version of this article appeared on Medscape.com.

Current management of children and adolescents with long COVID was the focus of various presentations at the 3rd Long COVID Congress in Berlin in November 2024. The congress aimed to facilitate in-depth discussions on recent research projects, diagnostic procedures, and therapeutic approaches to enhance care for long COVID patients. This year, the focus was on research into long COVID in children and adolescents and how to improve their care.

Uta Behrends, MD, head of the Munich Chronic Fatigue Center, Center for Pediatric and Adolescent Medicine at the Technical University of Munich, Germany, and Nicole Toepfner, MD, a pediatrician at the University Hospital in Dresden, Germany, provided an initial overview.

Prevalence Data Are Limited

Data on the incidence and prevalence of the condition in children and adolescents are limited because most studies have primarily examined adults. A 2022 Swiss study estimated that it affects between 2% and 3.5% of children and adolescents who contract COVID-19. A recent study published in JAMA involving 5367 children and adolescents found that 20% of children aged 6-11 years and 14% of adolescents met the researchers’ criteria for long COVID.

Impaired Mental Health

Initial data from the latest wave of the population-based longitudinal COPSY (Corona and Psyche) study showed that compared with their peer group children and adolescents diagnosed with long COVID exhibit significantly higher rates of psychological issues and depressive symptoms. Although no significant differences were found in anxiety levels, study leader Ulrike Ravens-Sieberer, PhD, from the University Medical Center Hamburg-Eppendorf, Germany, told the congress that those with long COVID do also report more frequent somatic or psychological health complaints and lower health-related quality of life than peers.

Addressing Data Gaps

Another study due to launch in January 2025 and run through to 2028 is the COVYOUTH data study, which aims to better understand the nature, frequency, and risk factors of COVID-related sequelae in children and adolescents.

Study centers include Ruhr University Bochum, University Hospital Cologne, the Paul-Ehrlich-Institut, and University Medical Center Hamburg-Eppendorf. Using routine data from statutory health insurance and newly developed case definitions, researchers aim to investigate:

• Psychological stress caused by COVID-19 measures 
• Post-COVID syndrome and myocarditis 
• Adverse effects of COVID-19 vaccinations 

Specialized Diagnostics and Care

The Post-COVID Kids Bavaria project offers specialized diagnostics and care for children and adolescents, including a day clinic, telemedical follow-ups, and an inpatient pain therapy module providing age-appropriate care as close to patients’ homes as possible.

MOVE-COVID is a model project for patient-focused research on long COVID and myalgic encephalomyelitis/chronic fatigue syndrome (ME/CFS) involving university pediatric hospitals in Freiburg, Heidelberg, Tübingen, and Ulm. It also aims to establish a care network across the state of Baden-Württemberg, including the establishment of long COVID outpatient clinics at social pediatric centers in the network hospitals, as well as enhanced telemedical support and standardized diagnostic and treatment protocols. “MOVE-COVID has successfully consolidated competencies and capacities in patient care, health services research, and patient-focused studies across multiple centers,” Behrends said.

Chronic Pain and Fatigue

Post-COVID syndromes in children and adolescents may feature profound fatigue, unrefreshing sleep, post-exertional malaise, cognitive dysfunction, and orthostatic intolerance and overlap with conditions such as ME/CFS. According to the German patient association Fatigatio, Berlin, research and studies for these conditions in children remain limited compared with those in adults. However, the US Centers for Disease Control estimates that around 2% of ME/CFS patients are children or adolescents, with the majority being teenagers.

Two inpatient treatment concepts, SHARK and TIGER, developed by Lea Höfel, PhD, head of the Centre for Pain Therapy for Young People and the Psychological Service at the Children’s Hospital in Garmisch-Partenkirchen, address chronic pain, fatigue, and ME/CFS in young people. These programs integrate structured breaks and flexible access to multiple therapists as needed. The TIGER program focuses on those with post-exertional malaise, while the SHARK program is designed for adolescents without this symptom. Both programs last 4.5-5 weeks and emphasize symptom reduction, education, and energy management.

Preliminary Results

SHARK included 30 participants (7 men; average age, 16 years), of whom 12 had a history of SARS-CoV-2 infection. TIGER involved 100 participants (24 men; average age, 16.7 years), of whom 32 had a SARS-CoV-2 infection as a triggering event. Other triggers included Epstein-Barr virus and other infections.

Preliminary findings from the projects indicate that optimized management with outpatient and follow-up care can yield positive, sometimes lasting effects. No significant differences between SARS-CoV-2 and other triggers emerged, but pain proved more manageable in the SHARK group than in the TIGER group, suggesting they may involve different pathological mechanisms.

Hope for Improved Outcomes

“It’s important to move away from the idea that nothing can be done,” Behrends said. This is a common attitude with children and adolescents displaying these types of symptoms, but it’s simply not true. “Even in pediatrics, we have numerous therapeutic options that may offer relief, from medication to psychosocial interventions,” she concluded.

This story was translated from Medscape’s German edition using several editorial tools, including artificial intelligence, as part of the process. Human editors reviewed this content before publication. A version of this article appeared on Medscape.com.

SAN ANTONIO — Adding the CDK 4/6 blocker palbociclib to standard endocrine and antihuman epidermal growth factor receptor 2 (HER2) therapies in metastatic hormone receptor (HR)–positive, HER2-positive breast cancer extended patients’ median progression-free survival more than a year, according to the results of the phase 3 PATINA study.

This regimen “may represent a new standard of care” for these patients, said principal investigator and presenter Otto Metzger, MD, a medical breast oncologist at the Dana-Farber Cancer Institute in Boston, Massachusetts, who presented the findings at the San Antonio Breast Cancer Symposium (SABCS) 2024.

The open-label PATINA trial, which was conducted in Europe, Australia, New Zealand, and the United States, included a total of 518 patients. Patients received first-line treatment of six to eight cycles of induction chemotherapy plus anti-HER2 therapy. Researchers then randomized patients to either palbociclib plus anti-HER2 and endocrine therapy (n = 261) or to anti-HER2 and endocrine therapy alone (n = 257).

Patients did not progress on induction therapy, which likely would have signaled early resistance to anti-HER2 treatment. For anti-HER2 therapy, 97.3% received a combination of trastuzumab and pertuzumab. For endocrine therapy, 90.9% received an aromatase inhibitor.

Metzger and colleagues found that median progression-free survival was 1.3 years longer in patients receiving palbociclib — 3.7 years in the palbociclib arm vs 2.4 years in the control group (hazard ratio [HR], 0.74; P = .0074).

Although overall survival outcomes are immature, 5-year survival rates were slightly better in the palbociclib arm — 74.3% with palbociclib vs 69.8% without it — but the difference was not statistically significant.

Grade 3 neutropenia was the most frequent adverse event in the palbociclib arm (63.2% vs 2%). Grades 2 and 3 fatigue, stomatitis, and diarrhea were also more common with palbociclib. Grade 4 adverse events occurred in 12.3% of those receiving palbociclib and 8.9% of those who did not. There were no treatment-related deaths.

“We’re very impressed with the results,” said Metzger.

On the basis of previous studies, it’s believed that CDK 4/6 inhibition counteracts the development of resistance to anti-HER2 and endocrine therapies, which likely explains the benefit found in the trial.

But even without CDK 4/6 inhibition, the progression-free survival of 2.4 years in the control arm “far exceed[ed] our expectations,” Metzger reported. This may have occurred because the control arm received endocrine therapy, something previous trials of anti-HER2 therapy have avoided because of tolerability and other concerns.

These findings, however, support “the common use of endocrine therapy,” Metzger said.

 

‘Incredible’ Results

The progression-free survival as well as overall survival results in the trial are “incredible,” said study discussant Sara Hurvitz, MD, a medical breast oncologist at the Fred Hutch Cancer Center in Seattle, Washington. This is “historic and very important data.”

Hurvitz even suggested the results might mean that patients who fit the PATINA criteria can avoid the toxicity of upfront trastuzumab deruxtecan and use the PATINA regimen instead, potentially preserving their quality of life for longer.

Another study discussant, Virginia Kaklamani, MD, a medical breast oncologist at the University of Texas MD Anderson Cancer Center, San Antonio, had a similar thought.

In PATINA, “we’re talking about patients being on a treatment that’s well tolerated, where patients continue to work and continue with their lives despite being on treatment for metastatic breast cancer for 4 years, which is remarkable,” Kaklamani said.

Many of us have dabbled with giving CDK 4/6 inhibitors in triple-positive breast cancer, but “now we have more definitive data,” she said. The approach can help “maintain the quality of life of our patients for a longer period of time” and delay the use of chemotherapy in the second line, she added.

Metzger said Pfizer, the maker of palbociclib, plans to file for a HER2-positive indication with the Food and Drug Administration based on the trial results.

For now, the CDK 4/6 blocker is only indicated in combination with endocrine therapy for HR-positive, HER2-negative metastatic disease.

In response to a question about using the PATINA regimen in patients who don’t get chemotherapy induction, Metzger noted that, “while the study didn’t test this directly, I would argue that this data is quite compelling” for using palbociclib plus anti-HER2 and endocrine therapy, even without chemotherapy induction.

The work was funded by palbociclib maker Pfizer. Metzger had no disclosures. Hurvitz has numerous industry ties, including being a researcher and advisor to Pfizer. Kaklamani also has numerous industry ties, including reporting personal/consulting fees from Pfizer Canada.

A version of this article first appeared on Medscape.com.

SAN ANTONIO — Adding the CDK 4/6 blocker palbociclib to standard endocrine and antihuman epidermal growth factor receptor 2 (HER2) therapies in metastatic hormone receptor (HR)–positive, HER2-positive breast cancer extended patients’ median progression-free survival more than a year, according to the results of the phase 3 PATINA study.

This regimen “may represent a new standard of care” for these patients, said principal investigator and presenter Otto Metzger, MD, a medical breast oncologist at the Dana-Farber Cancer Institute in Boston, Massachusetts, who presented the findings at the San Antonio Breast Cancer Symposium (SABCS) 2024.

The open-label PATINA trial, which was conducted in Europe, Australia, New Zealand, and the United States, included a total of 518 patients. Patients received first-line treatment of six to eight cycles of induction chemotherapy plus anti-HER2 therapy. Researchers then randomized patients to either palbociclib plus anti-HER2 and endocrine therapy (n = 261) or to anti-HER2 and endocrine therapy alone (n = 257).

Patients did not progress on induction therapy, which likely would have signaled early resistance to anti-HER2 treatment. For anti-HER2 therapy, 97.3% received a combination of trastuzumab and pertuzumab. For endocrine therapy, 90.9% received an aromatase inhibitor.

Metzger and colleagues found that median progression-free survival was 1.3 years longer in patients receiving palbociclib — 3.7 years in the palbociclib arm vs 2.4 years in the control group (hazard ratio [HR], 0.74; P = .0074).

Although overall survival outcomes are immature, 5-year survival rates were slightly better in the palbociclib arm — 74.3% with palbociclib vs 69.8% without it — but the difference was not statistically significant.

Grade 3 neutropenia was the most frequent adverse event in the palbociclib arm (63.2% vs 2%). Grades 2 and 3 fatigue, stomatitis, and diarrhea were also more common with palbociclib. Grade 4 adverse events occurred in 12.3% of those receiving palbociclib and 8.9% of those who did not. There were no treatment-related deaths.

“We’re very impressed with the results,” said Metzger.

On the basis of previous studies, it’s believed that CDK 4/6 inhibition counteracts the development of resistance to anti-HER2 and endocrine therapies, which likely explains the benefit found in the trial.

But even without CDK 4/6 inhibition, the progression-free survival of 2.4 years in the control arm “far exceed[ed] our expectations,” Metzger reported. This may have occurred because the control arm received endocrine therapy, something previous trials of anti-HER2 therapy have avoided because of tolerability and other concerns.

These findings, however, support “the common use of endocrine therapy,” Metzger said.

 

‘Incredible’ Results

The progression-free survival as well as overall survival results in the trial are “incredible,” said study discussant Sara Hurvitz, MD, a medical breast oncologist at the Fred Hutch Cancer Center in Seattle, Washington. This is “historic and very important data.”

Hurvitz even suggested the results might mean that patients who fit the PATINA criteria can avoid the toxicity of upfront trastuzumab deruxtecan and use the PATINA regimen instead, potentially preserving their quality of life for longer.

Another study discussant, Virginia Kaklamani, MD, a medical breast oncologist at the University of Texas MD Anderson Cancer Center, San Antonio, had a similar thought.

In PATINA, “we’re talking about patients being on a treatment that’s well tolerated, where patients continue to work and continue with their lives despite being on treatment for metastatic breast cancer for 4 years, which is remarkable,” Kaklamani said.

Many of us have dabbled with giving CDK 4/6 inhibitors in triple-positive breast cancer, but “now we have more definitive data,” she said. The approach can help “maintain the quality of life of our patients for a longer period of time” and delay the use of chemotherapy in the second line, she added.

Metzger said Pfizer, the maker of palbociclib, plans to file for a HER2-positive indication with the Food and Drug Administration based on the trial results.

For now, the CDK 4/6 blocker is only indicated in combination with endocrine therapy for HR-positive, HER2-negative metastatic disease.

In response to a question about using the PATINA regimen in patients who don’t get chemotherapy induction, Metzger noted that, “while the study didn’t test this directly, I would argue that this data is quite compelling” for using palbociclib plus anti-HER2 and endocrine therapy, even without chemotherapy induction.

The work was funded by palbociclib maker Pfizer. Metzger had no disclosures. Hurvitz has numerous industry ties, including being a researcher and advisor to Pfizer. Kaklamani also has numerous industry ties, including reporting personal/consulting fees from Pfizer Canada.

A version of this article first appeared on Medscape.com.

SAN ANTONIO — Adding the CDK 4/6 blocker palbociclib to standard endocrine and antihuman epidermal growth factor receptor 2 (HER2) therapies in metastatic hormone receptor (HR)–positive, HER2-positive breast cancer extended patients’ median progression-free survival more than a year, according to the results of the phase 3 PATINA study.

This regimen “may represent a new standard of care” for these patients, said principal investigator and presenter Otto Metzger, MD, a medical breast oncologist at the Dana-Farber Cancer Institute in Boston, Massachusetts, who presented the findings at the San Antonio Breast Cancer Symposium (SABCS) 2024.

The open-label PATINA trial, which was conducted in Europe, Australia, New Zealand, and the United States, included a total of 518 patients. Patients received first-line treatment of six to eight cycles of induction chemotherapy plus anti-HER2 therapy. Researchers then randomized patients to either palbociclib plus anti-HER2 and endocrine therapy (n = 261) or to anti-HER2 and endocrine therapy alone (n = 257).

Patients did not progress on induction therapy, which likely would have signaled early resistance to anti-HER2 treatment. For anti-HER2 therapy, 97.3% received a combination of trastuzumab and pertuzumab. For endocrine therapy, 90.9% received an aromatase inhibitor.

Metzger and colleagues found that median progression-free survival was 1.3 years longer in patients receiving palbociclib — 3.7 years in the palbociclib arm vs 2.4 years in the control group (hazard ratio [HR], 0.74; P = .0074).

Although overall survival outcomes are immature, 5-year survival rates were slightly better in the palbociclib arm — 74.3% with palbociclib vs 69.8% without it — but the difference was not statistically significant.

Grade 3 neutropenia was the most frequent adverse event in the palbociclib arm (63.2% vs 2%). Grades 2 and 3 fatigue, stomatitis, and diarrhea were also more common with palbociclib. Grade 4 adverse events occurred in 12.3% of those receiving palbociclib and 8.9% of those who did not. There were no treatment-related deaths.

“We’re very impressed with the results,” said Metzger.

On the basis of previous studies, it’s believed that CDK 4/6 inhibition counteracts the development of resistance to anti-HER2 and endocrine therapies, which likely explains the benefit found in the trial.

But even without CDK 4/6 inhibition, the progression-free survival of 2.4 years in the control arm “far exceed[ed] our expectations,” Metzger reported. This may have occurred because the control arm received endocrine therapy, something previous trials of anti-HER2 therapy have avoided because of tolerability and other concerns.

These findings, however, support “the common use of endocrine therapy,” Metzger said.

 

‘Incredible’ Results

The progression-free survival as well as overall survival results in the trial are “incredible,” said study discussant Sara Hurvitz, MD, a medical breast oncologist at the Fred Hutch Cancer Center in Seattle, Washington. This is “historic and very important data.”

Hurvitz even suggested the results might mean that patients who fit the PATINA criteria can avoid the toxicity of upfront trastuzumab deruxtecan and use the PATINA regimen instead, potentially preserving their quality of life for longer.

Another study discussant, Virginia Kaklamani, MD, a medical breast oncologist at the University of Texas MD Anderson Cancer Center, San Antonio, had a similar thought.

In PATINA, “we’re talking about patients being on a treatment that’s well tolerated, where patients continue to work and continue with their lives despite being on treatment for metastatic breast cancer for 4 years, which is remarkable,” Kaklamani said.

Many of us have dabbled with giving CDK 4/6 inhibitors in triple-positive breast cancer, but “now we have more definitive data,” she said. The approach can help “maintain the quality of life of our patients for a longer period of time” and delay the use of chemotherapy in the second line, she added.

Metzger said Pfizer, the maker of palbociclib, plans to file for a HER2-positive indication with the Food and Drug Administration based on the trial results.

For now, the CDK 4/6 blocker is only indicated in combination with endocrine therapy for HR-positive, HER2-negative metastatic disease.

In response to a question about using the PATINA regimen in patients who don’t get chemotherapy induction, Metzger noted that, “while the study didn’t test this directly, I would argue that this data is quite compelling” for using palbociclib plus anti-HER2 and endocrine therapy, even without chemotherapy induction.

The work was funded by palbociclib maker Pfizer. Metzger had no disclosures. Hurvitz has numerous industry ties, including being a researcher and advisor to Pfizer. Kaklamani also has numerous industry ties, including reporting personal/consulting fees from Pfizer Canada.

A version of this article first appeared on Medscape.com.

A major prospective study of more than half a million UK women conducted over almost 17 years has confirmed an association between dietary calcium intake and decreased risk of colorectal cancer. 

Cancer Research UK (CRUK), which funded the study, said that it demonstrated the benefits of a healthy, balanced diet for lowering cancer risk.

Colorectal cancer is the third most common cancer worldwide. Incidence rates vary markedly, with higher rates observed in high-income countries. The risk increases for individuals who migrate from low- to high-incidence areas, suggesting that lifestyle and environmental factors contribute to its development.

While alcohol and processed meats are established carcinogens, and red meat is classified as probably carcinogenic, there is a lack of consensus regarding the relationships between other dietary factors and colorectal cancer risk. This uncertainty may be due, at least in part, to relatively few studies giving comprehensive results on all food types, as well as dietary measurement errors, and/or small sample sizes.

 

Study Tracked 97 Dietary Factors

To address these gaps, the research team, led by the University of Oxford in England, tracked the intake of 97 dietary factors in 542,778 women from 2001 for an average of 16.6 years. During this period 12,251 participants developed colorectal cancer. The women completed detailed dietary questionnaires at baseline, with 7% participating in at least one subsequent 24-hour online dietary assessment.

Women diagnosed with colorectal cancer were generally older, taller, more likely to have a family history of bowel cancer, and have more adverse health behaviors, compared with participants overall.

 

Calcium Intake Showed the Strongest Protective Association

Relative risks (RR) for colorectal cancer were calculated for intakes of all 97 dietary factors, with significant associations found for 17 of them. Calcium intake showed the strongest protective effect, with each additional 300 mg per day – equivalent to a large glass of milk – associated with a 17% reduced RR. 

Six dairy-related factors associated with calcium – dairy milk, yogurt, riboflavin, magnesium, phosphorus, and potassium intakes – also demonstrated inverse associations with colorectal cancer risk. Weaker protective effects were noted for breakfast cereal, fruit, wholegrains, carbohydrates, fibre, total sugars, folate, and vitamin C. However, the team commented that these inverse associations might reflect residual confounding from other lifestyle or other dietary factors.

Calcium’s protective role was independent of dairy milk intake. The study, published in Nature Communications, concluded that, while “dairy products help protect against colorectal cancer,” that protection is “driven largely or wholly by calcium.”

 

Alcohol and Processed Meat Confirmed as Risk Factors

As expected, alcohol showed the reverse association, with each additional 20 g daily – equivalent to one large glass of wine – associated with a 15% RR increase. Weaker associations were seen for the combined category of red and processed meat, with each additional 30 g per day associated with an 8% increased RR for colorectal cancer. This association was minimally affected by diet and lifestyle factors.

Commenting to the Science Media Centre (SMC), Tom Sanders, professor emeritus of nutrition and dietetics at King’s College London, England, said: “One theory is that the calcium may bind to free bile acids in the gut, preventing the harmful effects of free bile acids on gut mucosa.” However, the lactose content in milk also has effects on large bowel microflora, which may in turn affect risk.

Also commenting to the SMC, David Nunan, senior research fellow at the University of Oxford’s Centre for Evidence Based Medicine, who was not involved in the study, cautioned that the findings were subject to the bias inherent in observational studies. “These biases often inflate the estimated associations compared to controlled experiments,” he said. Nunan advised caution in interpreting the findings, as more robust research, such as randomized controlled trials, would be needed to establish causation.

A version of this article first appeared on Medscape.com.

A major prospective study of more than half a million UK women conducted over almost 17 years has confirmed an association between dietary calcium intake and decreased risk of colorectal cancer. 

Cancer Research UK (CRUK), which funded the study, said that it demonstrated the benefits of a healthy, balanced diet for lowering cancer risk.

Colorectal cancer is the third most common cancer worldwide. Incidence rates vary markedly, with higher rates observed in high-income countries. The risk increases for individuals who migrate from low- to high-incidence areas, suggesting that lifestyle and environmental factors contribute to its development.

While alcohol and processed meats are established carcinogens, and red meat is classified as probably carcinogenic, there is a lack of consensus regarding the relationships between other dietary factors and colorectal cancer risk. This uncertainty may be due, at least in part, to relatively few studies giving comprehensive results on all food types, as well as dietary measurement errors, and/or small sample sizes.

 

Study Tracked 97 Dietary Factors

To address these gaps, the research team, led by the University of Oxford in England, tracked the intake of 97 dietary factors in 542,778 women from 2001 for an average of 16.6 years. During this period 12,251 participants developed colorectal cancer. The women completed detailed dietary questionnaires at baseline, with 7% participating in at least one subsequent 24-hour online dietary assessment.

Women diagnosed with colorectal cancer were generally older, taller, more likely to have a family history of bowel cancer, and have more adverse health behaviors, compared with participants overall.

 

Calcium Intake Showed the Strongest Protective Association

Relative risks (RR) for colorectal cancer were calculated for intakes of all 97 dietary factors, with significant associations found for 17 of them. Calcium intake showed the strongest protective effect, with each additional 300 mg per day – equivalent to a large glass of milk – associated with a 17% reduced RR. 

Six dairy-related factors associated with calcium – dairy milk, yogurt, riboflavin, magnesium, phosphorus, and potassium intakes – also demonstrated inverse associations with colorectal cancer risk. Weaker protective effects were noted for breakfast cereal, fruit, wholegrains, carbohydrates, fibre, total sugars, folate, and vitamin C. However, the team commented that these inverse associations might reflect residual confounding from other lifestyle or other dietary factors.

Calcium’s protective role was independent of dairy milk intake. The study, published in Nature Communications, concluded that, while “dairy products help protect against colorectal cancer,” that protection is “driven largely or wholly by calcium.”

 

Alcohol and Processed Meat Confirmed as Risk Factors

As expected, alcohol showed the reverse association, with each additional 20 g daily – equivalent to one large glass of wine – associated with a 15% RR increase. Weaker associations were seen for the combined category of red and processed meat, with each additional 30 g per day associated with an 8% increased RR for colorectal cancer. This association was minimally affected by diet and lifestyle factors.

Commenting to the Science Media Centre (SMC), Tom Sanders, professor emeritus of nutrition and dietetics at King’s College London, England, said: “One theory is that the calcium may bind to free bile acids in the gut, preventing the harmful effects of free bile acids on gut mucosa.” However, the lactose content in milk also has effects on large bowel microflora, which may in turn affect risk.

Also commenting to the SMC, David Nunan, senior research fellow at the University of Oxford’s Centre for Evidence Based Medicine, who was not involved in the study, cautioned that the findings were subject to the bias inherent in observational studies. “These biases often inflate the estimated associations compared to controlled experiments,” he said. Nunan advised caution in interpreting the findings, as more robust research, such as randomized controlled trials, would be needed to establish causation.

A version of this article first appeared on Medscape.com.

A major prospective study of more than half a million UK women conducted over almost 17 years has confirmed an association between dietary calcium intake and decreased risk of colorectal cancer. 

Cancer Research UK (CRUK), which funded the study, said that it demonstrated the benefits of a healthy, balanced diet for lowering cancer risk.

Colorectal cancer is the third most common cancer worldwide. Incidence rates vary markedly, with higher rates observed in high-income countries. The risk increases for individuals who migrate from low- to high-incidence areas, suggesting that lifestyle and environmental factors contribute to its development.

While alcohol and processed meats are established carcinogens, and red meat is classified as probably carcinogenic, there is a lack of consensus regarding the relationships between other dietary factors and colorectal cancer risk. This uncertainty may be due, at least in part, to relatively few studies giving comprehensive results on all food types, as well as dietary measurement errors, and/or small sample sizes.

 

Study Tracked 97 Dietary Factors

To address these gaps, the research team, led by the University of Oxford in England, tracked the intake of 97 dietary factors in 542,778 women from 2001 for an average of 16.6 years. During this period 12,251 participants developed colorectal cancer. The women completed detailed dietary questionnaires at baseline, with 7% participating in at least one subsequent 24-hour online dietary assessment.

Women diagnosed with colorectal cancer were generally older, taller, more likely to have a family history of bowel cancer, and have more adverse health behaviors, compared with participants overall.

 

Calcium Intake Showed the Strongest Protective Association

Relative risks (RR) for colorectal cancer were calculated for intakes of all 97 dietary factors, with significant associations found for 17 of them. Calcium intake showed the strongest protective effect, with each additional 300 mg per day – equivalent to a large glass of milk – associated with a 17% reduced RR. 

Six dairy-related factors associated with calcium – dairy milk, yogurt, riboflavin, magnesium, phosphorus, and potassium intakes – also demonstrated inverse associations with colorectal cancer risk. Weaker protective effects were noted for breakfast cereal, fruit, wholegrains, carbohydrates, fibre, total sugars, folate, and vitamin C. However, the team commented that these inverse associations might reflect residual confounding from other lifestyle or other dietary factors.

Calcium’s protective role was independent of dairy milk intake. The study, published in Nature Communications, concluded that, while “dairy products help protect against colorectal cancer,” that protection is “driven largely or wholly by calcium.”

 

Alcohol and Processed Meat Confirmed as Risk Factors

As expected, alcohol showed the reverse association, with each additional 20 g daily – equivalent to one large glass of wine – associated with a 15% RR increase. Weaker associations were seen for the combined category of red and processed meat, with each additional 30 g per day associated with an 8% increased RR for colorectal cancer. This association was minimally affected by diet and lifestyle factors.

Commenting to the Science Media Centre (SMC), Tom Sanders, professor emeritus of nutrition and dietetics at King’s College London, England, said: “One theory is that the calcium may bind to free bile acids in the gut, preventing the harmful effects of free bile acids on gut mucosa.” However, the lactose content in milk also has effects on large bowel microflora, which may in turn affect risk.

Also commenting to the SMC, David Nunan, senior research fellow at the University of Oxford’s Centre for Evidence Based Medicine, who was not involved in the study, cautioned that the findings were subject to the bias inherent in observational studies. “These biases often inflate the estimated associations compared to controlled experiments,” he said. Nunan advised caution in interpreting the findings, as more robust research, such as randomized controlled trials, would be needed to establish causation.

A version of this article first appeared on Medscape.com.

Tina is a lovely 67-year-old woman who was recently found to be an APOE gene carrier (a gene associated with increased risk of developing Alzheimer’s disease as well as an earlier age of disease onset), with diffused amyloid protein deposition her brain. 

Her neuropsychiatric testing was consistent with mild cognitive impairment. Although Tina is not a doctor herself, her entire family consists of doctors, and she came to me under their advisement to consider semaglutide (Ozempic) for early Alzheimer’s disease prevention. 

This would usually be simple, but in Tina’s case, there was a complicating factor: At 5’ and 90 pounds, she was already considerably underweight and was at risk of becoming severely undernourished. 

To understand the potential role for glucagon-like peptide-1 (GLP-1) receptor agonists such as Ozempic in prevention, a quick primer on Alzheimer’s Disease is necessary.

The exact cause of Alzheimer’s disease remains elusive, but it is probably due to a combination of factors, including:

• Buildup of abnormal amyloid and tau proteins around brain cells
• Brain shrinkage, with subsequent damage to blood vessels and mitochondria, and inflammation
• Genetic predisposition
• Lifestyle factors, including obesity, high blood pressure, high cholesterol, and diabetes.

GLP-1 receptor agonists can cross the blood-brain barrier and bind to GLP-1 receptors expressed by neurons. Once in the brain, they can reduce inflammation and improve functioning of the neurons. In early rodent trials, GLP-1 receptor agonists led to reduced amyloid and tau aggregation, downregulation of inflammation, and improved memory.

In 2021, multiple studies showed that liraglutide, an early GLP-1 receptor agonist, improved cognitive function and MRI volume in patients with Alzheimer’s disease. 

A study recently published in Alzheimer’s & Dementia analyzed data from 1 million people with type 2 diabetes and no prior Alzheimer’s disease diagnosis. The authors compared Alzheimer’s disease occurrence in patients taking various diabetes medications, including insulin, metformin, and GLP-1 receptor agonists. The study found that participants taking semaglutide had up to a 70% reduction in Alzheimer’s risk. The results were consistent across gender, age, and weight.

Given the reassuring safety profile of GLP-1 receptor agonists and lack of other effective treatment or prophylaxis for Alzheimer’s disease, I agreed to start her on dulaglutide (Trulicity). My rationale was twofold:

1. In studies, dulaglutide has the highest uptake in the brain tissue at 68%. By contrast, there is virtually zero uptake in brain tissue for semaglutide (Ozempic/Wegovy) and tirzepatide (Mounjaro/Zepbound). Because this class of drugs exert their effects in the brain tissue, I wanted to give her a GLP-1 receptor agonist with a high percent uptake.

2. Trulicity has a minimal effect on weight loss compared with the newer-generation GLP-1 receptor agonists. Even so, I connected Tina to my dietitian to ensure that she would receive a high-protein, high-calorie diet.

Tina has now been taking Trulicity for 6 months. Although it is certainly too early to draw firm conclusions about the efficacy of her treatment, she is not experiencing any weight loss and is cognitively stable, according to her neurologist. 

The EVOKE and EVOKE+ phase 3 trials are currently underway to evaluate the efficacy of semaglutide to treat mild cognitive impairment and early Alzheimer’s in amyloid-positive patients. Results are expected in 2025, but in the meantime, I feel comforted knowing that Tina is receiving a potentially beneficial and definitively low-risk treatment. 

 

Dr Messer, Clinical Assistant Professor, Mount Sinai School of Medicine; Associate Professor, Hofstra School of Medicine, New York, NY, has disclosed no relevant financial relationships.

A version of this article appeared on Medscape.com.

Tina is a lovely 67-year-old woman who was recently found to be an APOE gene carrier (a gene associated with increased risk of developing Alzheimer’s disease as well as an earlier age of disease onset), with diffused amyloid protein deposition her brain. 

Her neuropsychiatric testing was consistent with mild cognitive impairment. Although Tina is not a doctor herself, her entire family consists of doctors, and she came to me under their advisement to consider semaglutide (Ozempic) for early Alzheimer’s disease prevention. 

This would usually be simple, but in Tina’s case, there was a complicating factor: At 5’ and 90 pounds, she was already considerably underweight and was at risk of becoming severely undernourished. 

To understand the potential role for glucagon-like peptide-1 (GLP-1) receptor agonists such as Ozempic in prevention, a quick primer on Alzheimer’s Disease is necessary.

The exact cause of Alzheimer’s disease remains elusive, but it is probably due to a combination of factors, including:

• Buildup of abnormal amyloid and tau proteins around brain cells
• Brain shrinkage, with subsequent damage to blood vessels and mitochondria, and inflammation
• Genetic predisposition
• Lifestyle factors, including obesity, high blood pressure, high cholesterol, and diabetes.

GLP-1 receptor agonists can cross the blood-brain barrier and bind to GLP-1 receptors expressed by neurons. Once in the brain, they can reduce inflammation and improve functioning of the neurons. In early rodent trials, GLP-1 receptor agonists led to reduced amyloid and tau aggregation, downregulation of inflammation, and improved memory.

In 2021, multiple studies showed that liraglutide, an early GLP-1 receptor agonist, improved cognitive function and MRI volume in patients with Alzheimer’s disease. 

A study recently published in Alzheimer’s & Dementia analyzed data from 1 million people with type 2 diabetes and no prior Alzheimer’s disease diagnosis. The authors compared Alzheimer’s disease occurrence in patients taking various diabetes medications, including insulin, metformin, and GLP-1 receptor agonists. The study found that participants taking semaglutide had up to a 70% reduction in Alzheimer’s risk. The results were consistent across gender, age, and weight.

Given the reassuring safety profile of GLP-1 receptor agonists and lack of other effective treatment or prophylaxis for Alzheimer’s disease, I agreed to start her on dulaglutide (Trulicity). My rationale was twofold:

1. In studies, dulaglutide has the highest uptake in the brain tissue at 68%. By contrast, there is virtually zero uptake in brain tissue for semaglutide (Ozempic/Wegovy) and tirzepatide (Mounjaro/Zepbound). Because this class of drugs exert their effects in the brain tissue, I wanted to give her a GLP-1 receptor agonist with a high percent uptake.

2. Trulicity has a minimal effect on weight loss compared with the newer-generation GLP-1 receptor agonists. Even so, I connected Tina to my dietitian to ensure that she would receive a high-protein, high-calorie diet.

Tina has now been taking Trulicity for 6 months. Although it is certainly too early to draw firm conclusions about the efficacy of her treatment, she is not experiencing any weight loss and is cognitively stable, according to her neurologist. 

The EVOKE and EVOKE+ phase 3 trials are currently underway to evaluate the efficacy of semaglutide to treat mild cognitive impairment and early Alzheimer’s in amyloid-positive patients. Results are expected in 2025, but in the meantime, I feel comforted knowing that Tina is receiving a potentially beneficial and definitively low-risk treatment. 

 

Dr Messer, Clinical Assistant Professor, Mount Sinai School of Medicine; Associate Professor, Hofstra School of Medicine, New York, NY, has disclosed no relevant financial relationships.

A version of this article appeared on Medscape.com.

Tina is a lovely 67-year-old woman who was recently found to be an APOE gene carrier (a gene associated with increased risk of developing Alzheimer’s disease as well as an earlier age of disease onset), with diffused amyloid protein deposition her brain. 

Her neuropsychiatric testing was consistent with mild cognitive impairment. Although Tina is not a doctor herself, her entire family consists of doctors, and she came to me under their advisement to consider semaglutide (Ozempic) for early Alzheimer’s disease prevention. 

This would usually be simple, but in Tina’s case, there was a complicating factor: At 5’ and 90 pounds, she was already considerably underweight and was at risk of becoming severely undernourished. 

To understand the potential role for glucagon-like peptide-1 (GLP-1) receptor agonists such as Ozempic in prevention, a quick primer on Alzheimer’s Disease is necessary.

The exact cause of Alzheimer’s disease remains elusive, but it is probably due to a combination of factors, including:

• Buildup of abnormal amyloid and tau proteins around brain cells
• Brain shrinkage, with subsequent damage to blood vessels and mitochondria, and inflammation
• Genetic predisposition
• Lifestyle factors, including obesity, high blood pressure, high cholesterol, and diabetes.

GLP-1 receptor agonists can cross the blood-brain barrier and bind to GLP-1 receptors expressed by neurons. Once in the brain, they can reduce inflammation and improve functioning of the neurons. In early rodent trials, GLP-1 receptor agonists led to reduced amyloid and tau aggregation, downregulation of inflammation, and improved memory.

In 2021, multiple studies showed that liraglutide, an early GLP-1 receptor agonist, improved cognitive function and MRI volume in patients with Alzheimer’s disease. 

A study recently published in Alzheimer’s & Dementia analyzed data from 1 million people with type 2 diabetes and no prior Alzheimer’s disease diagnosis. The authors compared Alzheimer’s disease occurrence in patients taking various diabetes medications, including insulin, metformin, and GLP-1 receptor agonists. The study found that participants taking semaglutide had up to a 70% reduction in Alzheimer’s risk. The results were consistent across gender, age, and weight.

Given the reassuring safety profile of GLP-1 receptor agonists and lack of other effective treatment or prophylaxis for Alzheimer’s disease, I agreed to start her on dulaglutide (Trulicity). My rationale was twofold:

1. In studies, dulaglutide has the highest uptake in the brain tissue at 68%. By contrast, there is virtually zero uptake in brain tissue for semaglutide (Ozempic/Wegovy) and tirzepatide (Mounjaro/Zepbound). Because this class of drugs exert their effects in the brain tissue, I wanted to give her a GLP-1 receptor agonist with a high percent uptake.

2. Trulicity has a minimal effect on weight loss compared with the newer-generation GLP-1 receptor agonists. Even so, I connected Tina to my dietitian to ensure that she would receive a high-protein, high-calorie diet.

Tina has now been taking Trulicity for 6 months. Although it is certainly too early to draw firm conclusions about the efficacy of her treatment, she is not experiencing any weight loss and is cognitively stable, according to her neurologist. 

The EVOKE and EVOKE+ phase 3 trials are currently underway to evaluate the efficacy of semaglutide to treat mild cognitive impairment and early Alzheimer’s in amyloid-positive patients. Results are expected in 2025, but in the meantime, I feel comforted knowing that Tina is receiving a potentially beneficial and definitively low-risk treatment. 

 

Dr Messer, Clinical Assistant Professor, Mount Sinai School of Medicine; Associate Professor, Hofstra School of Medicine, New York, NY, has disclosed no relevant financial relationships.

A version of this article appeared on Medscape.com.

MRI-invisible prostate lesions. It sounds like the stuff of science fiction and fantasy, a creation from the minds of H.G. Wells, who wrote The Invisible Man, or J.K. Rowling, who authored the Harry Potter series.

But MRI-invisible prostate lesions are real. And what these lesions may, or may not, indicate is the subject of intense debate.

MRI plays an increasingly important role in detecting and diagnosing prostate cancer, staging prostate cancer as well as monitoring disease progression. However, on occasion, a puzzling phenomenon arises. Certain prostate lesions that appear when pathologists examine biopsied tissue samples under a microscope are not visible on MRI. The prostate tissue will, instead, appear normal to a radiologist’s eye.

Why are certain lesions invisible with MRI? And is it dangerous for patients if these lesions are not detected? 

Some experts believe these MRI-invisible lesions are nothing to worry about.

If the clinician can’t see the cancer on MRI, then it simply isn’t a threat, according to Mark Emberton, MD, a pioneer in prostate MRIs and director of interventional oncology at University College London, England.

Laurence Klotz, MD, of the University of Toronto, Ontario, Canada, agreed, noting that “invisible cancers are clinically insignificant and don’t require systematic biopsies.”

Emberton and Klotz compared MRI-invisible lesions to grade group 1 prostate cancer (Gleason score ≤ 6) — the least aggressive category that indicates the cancer that is not likely to spread or kill. For patients on active surveillance, those with MRI-invisible cancers do drastically better than those with visible cancers, Klotz explained.

But other experts in the field are skeptical that MRI-invisible lesions are truly innocuous.

Although statistically an MRI-visible prostate lesion indicates a more aggressive tumor, that is not always the case for every individual, said Brian Helfand, MD, PhD, chief of urology at NorthShore University Health System, Evanston, Illinois.

MRIs can lead to false negatives in about 10%-20% of patients who have clinically significant prostate cancer, though estimates vary.

In one analysis, 16% of men with no suspicious lesions on MRI had clinically significant prostate cancer identified after undergoing a systematic biopsy. Another analysis found that about 35% of MRI-invisible prostate cancers identified via biopsy were clinically significant.

Other studies, however, have indicated that negative MRI results accurately indicate patients at low risk of developing clinically significant cancers. A recent JAMA Oncology analysis, for instance, found that only seven of 233 men (3%) with negative MRI results at baseline who completed 3 years of monitoring were diagnosed with clinically significant prostate cancer.

When a patient has an MRI-invisible prostate tumor, there are a couple of reasons the MRI may not be picking it up, said urologic oncologist Alexander Putnam Cole, MD, assistant professor of surgery, Harvard Medical School, Boston, Massachusetts. “One is that the cancer is aggressive but just very small,” said Cole.

“Another possibility is that the cancer looks very similar to background prostate tissue, which is something that you might expect if you think about more of a low-grade cancer,” he explained.

The experience level of the radiologist interpreting the MRI can also play into the accuracy of the reading.

But Cole agreed that “in general, MRI visibility is associated with molecular and histologic features of progression and aggressiveness and non-visible cancers are less likely to have aggressive features.”

The genomic profiles of MRI-visible and -invisible cancers bear this out.

According to Todd Morgan, MD, chief of urologic oncology at Michigan Medicine, University of Michigan, Ann Arbor, the gene expression in visible disease tends to be linked to more aggressive prostate tumors whereas gene expression in invisible disease does not.

In one analysis, for instance, researchers found that four genes — PHYHD1, CENPF, ALDH2, and GDF15 — associated with worse progression-free survival and metastasis-free survival in prostate cancer also predicted MRI visibility.

“Genes that are associated with visibility are essentially the same genes that are associated with aggressive cancers,” Klotz said.

 

Next Steps After Negative MRI Result

What do MRI-invisible lesions mean for patient care? If, for instance, a patient has elevated PSA levels but a normal MRI, is a targeted or systematic biopsy warranted?

The overarching message, according to Klotz, is that “you don’t need to find them.” Klotz noted, however, that patients with a negative MRI result should still be followed with periodic repeat imaging.

Several trials support this approach of using MRI to decide who needs a biopsy and delaying a biopsy in men with normal MRIs.

The recent JAMA Oncology analysis found that, among men with negative MRI results, 86% avoided a biopsy over 3 years, with clinically significant prostate cancer detected in only 4% of men across the study period — four in the initial diagnostic phase and seven in the 3-year monitoring phase. However, during the initial diagnostic phase, more than half the men with positive MRI findings had clinically significant prostate cancer detected.

Another recent study found that patients with negative MRI results were much less likely to upgrade to higher Gleason scores over time. Among 522 patients who underwent a systematic and targeted biopsy within 18 months of their grade group 1 designation, 9.2% with negative MRI findings had tumors reclassified as grade group 2 or higher vs 27% with positive MRI findings, and 2.3% with negative MRI findings had tumors reclassified as grade group 3 or higher vs 7.8% with positive MRI findings.

These data suggest that men with grade group 1 cancer and negative MRI result “may be able to avoid confirmatory biopsies until a routine surveillance biopsy in 2-3 years,” according to study author Christian Pavlovich, MD, professor of urologic oncology at the Johns Hopkins University School of Medicine, Baltimore.

Cole used MRI findings to triage who gets a biopsy. When a biopsy is warranted, “I usually recommend adding in some systematic sampling of the other side to assess for nonvisible cancers,” he noted.

Sampling prostate tissue outside the target area “adds maybe 1-2 minutes to the procedure and doesn’t drastically increase the morbidity or risks,” Cole said. It also can help “confirm there is cancer in the MRI target and also confirm there is no cancer in the nonvisible areas.” 

According to Klotz, if imaging demonstrates progression, patients should receive a biopsy — in most cases, a targeted biopsy only. And, Klotz noted, skipping routine prostate biopsies in men with negative MRI results can save thousands of men from these procedures, which carry risks for infections and sepsis.

Looking beyond Gleason scores for risk prediction, MRI “visibility is a very powerful risk stratifier,” he said.

A version of this article appeared on Medscape.com.

MRI-invisible prostate lesions. It sounds like the stuff of science fiction and fantasy, a creation from the minds of H.G. Wells, who wrote The Invisible Man, or J.K. Rowling, who authored the Harry Potter series.

But MRI-invisible prostate lesions are real. And what these lesions may, or may not, indicate is the subject of intense debate.

MRI plays an increasingly important role in detecting and diagnosing prostate cancer, staging prostate cancer as well as monitoring disease progression. However, on occasion, a puzzling phenomenon arises. Certain prostate lesions that appear when pathologists examine biopsied tissue samples under a microscope are not visible on MRI. The prostate tissue will, instead, appear normal to a radiologist’s eye.

Why are certain lesions invisible with MRI? And is it dangerous for patients if these lesions are not detected? 

Some experts believe these MRI-invisible lesions are nothing to worry about.

If the clinician can’t see the cancer on MRI, then it simply isn’t a threat, according to Mark Emberton, MD, a pioneer in prostate MRIs and director of interventional oncology at University College London, England.

Laurence Klotz, MD, of the University of Toronto, Ontario, Canada, agreed, noting that “invisible cancers are clinically insignificant and don’t require systematic biopsies.”

Emberton and Klotz compared MRI-invisible lesions to grade group 1 prostate cancer (Gleason score ≤ 6) — the least aggressive category that indicates the cancer that is not likely to spread or kill. For patients on active surveillance, those with MRI-invisible cancers do drastically better than those with visible cancers, Klotz explained.

But other experts in the field are skeptical that MRI-invisible lesions are truly innocuous.

Although statistically an MRI-visible prostate lesion indicates a more aggressive tumor, that is not always the case for every individual, said Brian Helfand, MD, PhD, chief of urology at NorthShore University Health System, Evanston, Illinois.

MRIs can lead to false negatives in about 10%-20% of patients who have clinically significant prostate cancer, though estimates vary.

In one analysis, 16% of men with no suspicious lesions on MRI had clinically significant prostate cancer identified after undergoing a systematic biopsy. Another analysis found that about 35% of MRI-invisible prostate cancers identified via biopsy were clinically significant.

Other studies, however, have indicated that negative MRI results accurately indicate patients at low risk of developing clinically significant cancers. A recent JAMA Oncology analysis, for instance, found that only seven of 233 men (3%) with negative MRI results at baseline who completed 3 years of monitoring were diagnosed with clinically significant prostate cancer.

When a patient has an MRI-invisible prostate tumor, there are a couple of reasons the MRI may not be picking it up, said urologic oncologist Alexander Putnam Cole, MD, assistant professor of surgery, Harvard Medical School, Boston, Massachusetts. “One is that the cancer is aggressive but just very small,” said Cole.

“Another possibility is that the cancer looks very similar to background prostate tissue, which is something that you might expect if you think about more of a low-grade cancer,” he explained.

The experience level of the radiologist interpreting the MRI can also play into the accuracy of the reading.

But Cole agreed that “in general, MRI visibility is associated with molecular and histologic features of progression and aggressiveness and non-visible cancers are less likely to have aggressive features.”

The genomic profiles of MRI-visible and -invisible cancers bear this out.

According to Todd Morgan, MD, chief of urologic oncology at Michigan Medicine, University of Michigan, Ann Arbor, the gene expression in visible disease tends to be linked to more aggressive prostate tumors whereas gene expression in invisible disease does not.

In one analysis, for instance, researchers found that four genes — PHYHD1, CENPF, ALDH2, and GDF15 — associated with worse progression-free survival and metastasis-free survival in prostate cancer also predicted MRI visibility.

“Genes that are associated with visibility are essentially the same genes that are associated with aggressive cancers,” Klotz said.

 

Next Steps After Negative MRI Result

What do MRI-invisible lesions mean for patient care? If, for instance, a patient has elevated PSA levels but a normal MRI, is a targeted or systematic biopsy warranted?

The overarching message, according to Klotz, is that “you don’t need to find them.” Klotz noted, however, that patients with a negative MRI result should still be followed with periodic repeat imaging.

Several trials support this approach of using MRI to decide who needs a biopsy and delaying a biopsy in men with normal MRIs.

The recent JAMA Oncology analysis found that, among men with negative MRI results, 86% avoided a biopsy over 3 years, with clinically significant prostate cancer detected in only 4% of men across the study period — four in the initial diagnostic phase and seven in the 3-year monitoring phase. However, during the initial diagnostic phase, more than half the men with positive MRI findings had clinically significant prostate cancer detected.

Another recent study found that patients with negative MRI results were much less likely to upgrade to higher Gleason scores over time. Among 522 patients who underwent a systematic and targeted biopsy within 18 months of their grade group 1 designation, 9.2% with negative MRI findings had tumors reclassified as grade group 2 or higher vs 27% with positive MRI findings, and 2.3% with negative MRI findings had tumors reclassified as grade group 3 or higher vs 7.8% with positive MRI findings.

These data suggest that men with grade group 1 cancer and negative MRI result “may be able to avoid confirmatory biopsies until a routine surveillance biopsy in 2-3 years,” according to study author Christian Pavlovich, MD, professor of urologic oncology at the Johns Hopkins University School of Medicine, Baltimore.

Cole used MRI findings to triage who gets a biopsy. When a biopsy is warranted, “I usually recommend adding in some systematic sampling of the other side to assess for nonvisible cancers,” he noted.

Sampling prostate tissue outside the target area “adds maybe 1-2 minutes to the procedure and doesn’t drastically increase the morbidity or risks,” Cole said. It also can help “confirm there is cancer in the MRI target and also confirm there is no cancer in the nonvisible areas.” 

According to Klotz, if imaging demonstrates progression, patients should receive a biopsy — in most cases, a targeted biopsy only. And, Klotz noted, skipping routine prostate biopsies in men with negative MRI results can save thousands of men from these procedures, which carry risks for infections and sepsis.

Looking beyond Gleason scores for risk prediction, MRI “visibility is a very powerful risk stratifier,” he said.

A version of this article appeared on Medscape.com.

MRI-invisible prostate lesions. It sounds like the stuff of science fiction and fantasy, a creation from the minds of H.G. Wells, who wrote The Invisible Man, or J.K. Rowling, who authored the Harry Potter series.

But MRI-invisible prostate lesions are real. And what these lesions may, or may not, indicate is the subject of intense debate.

MRI plays an increasingly important role in detecting and diagnosing prostate cancer, staging prostate cancer as well as monitoring disease progression. However, on occasion, a puzzling phenomenon arises. Certain prostate lesions that appear when pathologists examine biopsied tissue samples under a microscope are not visible on MRI. The prostate tissue will, instead, appear normal to a radiologist’s eye.

Why are certain lesions invisible with MRI? And is it dangerous for patients if these lesions are not detected? 

Some experts believe these MRI-invisible lesions are nothing to worry about.

If the clinician can’t see the cancer on MRI, then it simply isn’t a threat, according to Mark Emberton, MD, a pioneer in prostate MRIs and director of interventional oncology at University College London, England.

Laurence Klotz, MD, of the University of Toronto, Ontario, Canada, agreed, noting that “invisible cancers are clinically insignificant and don’t require systematic biopsies.”

Emberton and Klotz compared MRI-invisible lesions to grade group 1 prostate cancer (Gleason score ≤ 6) — the least aggressive category that indicates the cancer that is not likely to spread or kill. For patients on active surveillance, those with MRI-invisible cancers do drastically better than those with visible cancers, Klotz explained.

But other experts in the field are skeptical that MRI-invisible lesions are truly innocuous.

Although statistically an MRI-visible prostate lesion indicates a more aggressive tumor, that is not always the case for every individual, said Brian Helfand, MD, PhD, chief of urology at NorthShore University Health System, Evanston, Illinois.

MRIs can lead to false negatives in about 10%-20% of patients who have clinically significant prostate cancer, though estimates vary.

In one analysis, 16% of men with no suspicious lesions on MRI had clinically significant prostate cancer identified after undergoing a systematic biopsy. Another analysis found that about 35% of MRI-invisible prostate cancers identified via biopsy were clinically significant.

Other studies, however, have indicated that negative MRI results accurately indicate patients at low risk of developing clinically significant cancers. A recent JAMA Oncology analysis, for instance, found that only seven of 233 men (3%) with negative MRI results at baseline who completed 3 years of monitoring were diagnosed with clinically significant prostate cancer.

When a patient has an MRI-invisible prostate tumor, there are a couple of reasons the MRI may not be picking it up, said urologic oncologist Alexander Putnam Cole, MD, assistant professor of surgery, Harvard Medical School, Boston, Massachusetts. “One is that the cancer is aggressive but just very small,” said Cole.

“Another possibility is that the cancer looks very similar to background prostate tissue, which is something that you might expect if you think about more of a low-grade cancer,” he explained.

The experience level of the radiologist interpreting the MRI can also play into the accuracy of the reading.

But Cole agreed that “in general, MRI visibility is associated with molecular and histologic features of progression and aggressiveness and non-visible cancers are less likely to have aggressive features.”

The genomic profiles of MRI-visible and -invisible cancers bear this out.

According to Todd Morgan, MD, chief of urologic oncology at Michigan Medicine, University of Michigan, Ann Arbor, the gene expression in visible disease tends to be linked to more aggressive prostate tumors whereas gene expression in invisible disease does not.

In one analysis, for instance, researchers found that four genes — PHYHD1, CENPF, ALDH2, and GDF15 — associated with worse progression-free survival and metastasis-free survival in prostate cancer also predicted MRI visibility.

“Genes that are associated with visibility are essentially the same genes that are associated with aggressive cancers,” Klotz said.

 

Next Steps After Negative MRI Result

What do MRI-invisible lesions mean for patient care? If, for instance, a patient has elevated PSA levels but a normal MRI, is a targeted or systematic biopsy warranted?

The overarching message, according to Klotz, is that “you don’t need to find them.” Klotz noted, however, that patients with a negative MRI result should still be followed with periodic repeat imaging.

Several trials support this approach of using MRI to decide who needs a biopsy and delaying a biopsy in men with normal MRIs.

The recent JAMA Oncology analysis found that, among men with negative MRI results, 86% avoided a biopsy over 3 years, with clinically significant prostate cancer detected in only 4% of men across the study period — four in the initial diagnostic phase and seven in the 3-year monitoring phase. However, during the initial diagnostic phase, more than half the men with positive MRI findings had clinically significant prostate cancer detected.

Another recent study found that patients with negative MRI results were much less likely to upgrade to higher Gleason scores over time. Among 522 patients who underwent a systematic and targeted biopsy within 18 months of their grade group 1 designation, 9.2% with negative MRI findings had tumors reclassified as grade group 2 or higher vs 27% with positive MRI findings, and 2.3% with negative MRI findings had tumors reclassified as grade group 3 or higher vs 7.8% with positive MRI findings.

These data suggest that men with grade group 1 cancer and negative MRI result “may be able to avoid confirmatory biopsies until a routine surveillance biopsy in 2-3 years,” according to study author Christian Pavlovich, MD, professor of urologic oncology at the Johns Hopkins University School of Medicine, Baltimore.

Cole used MRI findings to triage who gets a biopsy. When a biopsy is warranted, “I usually recommend adding in some systematic sampling of the other side to assess for nonvisible cancers,” he noted.

Sampling prostate tissue outside the target area “adds maybe 1-2 minutes to the procedure and doesn’t drastically increase the morbidity or risks,” Cole said. It also can help “confirm there is cancer in the MRI target and also confirm there is no cancer in the nonvisible areas.” 

According to Klotz, if imaging demonstrates progression, patients should receive a biopsy — in most cases, a targeted biopsy only. And, Klotz noted, skipping routine prostate biopsies in men with negative MRI results can save thousands of men from these procedures, which carry risks for infections and sepsis.

Looking beyond Gleason scores for risk prediction, MRI “visibility is a very powerful risk stratifier,” he said.

A version of this article appeared on Medscape.com.

TOPLINE:

Among older adults with type 2 diabetes (T2D), the use of antidiabetes medications declined in the last year before death, with notable shifts from metformin and sulfonylureas toward insulin therapy.

METHODOLOGY:

Current recommendations emphasize a more liberal approach to glycemic control in people with a high burden of comorbidities and shorter life expectancy, but little is known about the changes and discontinuation patterns of diabetes medications among older adults near the end of life.

Researchers conducted an observational cohort study to assess the prescribing trends of antidiabetes medications in the final year of life among 975,407 community-dwelling Medicare beneficiaries with T2D (mean age at death, 80.9 years; 54.3% women) who died between January 2015 and December 2019.

All medication classes available during the study period were considered, including short-acting and long-acting insulins, metformin, sulfonylureas, dipeptidyl peptidase-4 inhibitors, glucagon-like peptide 1 (GLP-1) receptor agonists, sodium-glucose cotransporter-2 (SGLT2) inhibitors, and other medications.

Analysis included temporal trends in prescribing antidiabetes medications, stratified by frailty using a validated claims-based frailty index, with scores ≥ 0.30 indicating higher frailty.

Antidiabetes medication fills were assessed within 1 year before death, examining changes across three time periods: 12 to 8 months, 8 to 4 months, and 4 to 0 months before death.

TAKEAWAY:

The proportion of older patients receiving antidiabetes medications increased slightly from 71.4% in 2015 to 72.9% in 2019, with metformin showing the largest increase from 40.7% to 46.5% (standardized mean difference [SMD], −0.12) and sulfonylureas showing the largest decrease from 37.0% to 31.8% (SMD, 0.11).

The use of newer diabetes medications with cardiovascular benefits, such as GLP-1 receptor agonists and SGLT2 inhibitors, remained less common but showed increasing trends over time.

The use of any antidiabetes medication decreased from 66.1% in the 9 to 12 months before death to 60.8% in the last 4 months of life (P < .01), primarily due to the reduced use of metformin and sulfonylureas.

The use of both short-acting and long-acting insulin agents increased toward the end of life (from 28.0% to 32.9% and from 41.2% to 43.9%, respectively; both P < .001) , particularly among frailer individuals.

IN PRACTICE:

“[The study] findings underscore important implications for diabetes management in patients nearing the end of life. With ~70% of patients with T2D using at least one antidiabetes medication, there is a need to consider further de-escalation or deprescribing in this vulnerable population,” the authors wrote.

SOURCE:

The study was led by Alexander Kutz, MD, MPH, MSc, Division of Pharmacoepidemiology and Pharmacoeconomics, Department of Medicine, Brigham and Women’s Hospital and Harvard Medical School, Boston, and was published online in Diabetes Care.

LIMITATIONS:

The study lacked details on the reasons for changes in medication patterns, making it unclear whether these changes were due to clinical guidelines or to reduce adverse events. Moreover, the study could not capture transitions or substitutions between medications, information on the dosage data, and causes of death.

DISCLOSURES:

This study was supported by the Division of Pharmacoepidemiology and Pharmacoeconomics, Department of Medicine, Brigham and Women’s Hospital, Harvard Medical School. Some authors reported receiving personal fees or research grants from the National Institutes of Health and other institutions and a few pharmaceutical companies. One author reported acting as a principal investigator and receiving a research grant from Boehringer-Ingelheim, unrelated to the work.

 

This article was created using several editorial tools, including AI, as part of the process. Human editors reviewed this content before publication. A version of this article appeared on Medscape.com.

TOPLINE:

Among older adults with type 2 diabetes (T2D), the use of antidiabetes medications declined in the last year before death, with notable shifts from metformin and sulfonylureas toward insulin therapy.

METHODOLOGY:

Current recommendations emphasize a more liberal approach to glycemic control in people with a high burden of comorbidities and shorter life expectancy, but little is known about the changes and discontinuation patterns of diabetes medications among older adults near the end of life.

Researchers conducted an observational cohort study to assess the prescribing trends of antidiabetes medications in the final year of life among 975,407 community-dwelling Medicare beneficiaries with T2D (mean age at death, 80.9 years; 54.3% women) who died between January 2015 and December 2019.

All medication classes available during the study period were considered, including short-acting and long-acting insulins, metformin, sulfonylureas, dipeptidyl peptidase-4 inhibitors, glucagon-like peptide 1 (GLP-1) receptor agonists, sodium-glucose cotransporter-2 (SGLT2) inhibitors, and other medications.

Analysis included temporal trends in prescribing antidiabetes medications, stratified by frailty using a validated claims-based frailty index, with scores ≥ 0.30 indicating higher frailty.

Antidiabetes medication fills were assessed within 1 year before death, examining changes across three time periods: 12 to 8 months, 8 to 4 months, and 4 to 0 months before death.

TAKEAWAY:

The proportion of older patients receiving antidiabetes medications increased slightly from 71.4% in 2015 to 72.9% in 2019, with metformin showing the largest increase from 40.7% to 46.5% (standardized mean difference [SMD], −0.12) and sulfonylureas showing the largest decrease from 37.0% to 31.8% (SMD, 0.11).

The use of newer diabetes medications with cardiovascular benefits, such as GLP-1 receptor agonists and SGLT2 inhibitors, remained less common but showed increasing trends over time.

The use of any antidiabetes medication decreased from 66.1% in the 9 to 12 months before death to 60.8% in the last 4 months of life (P < .01), primarily due to the reduced use of metformin and sulfonylureas.

The use of both short-acting and long-acting insulin agents increased toward the end of life (from 28.0% to 32.9% and from 41.2% to 43.9%, respectively; both P < .001) , particularly among frailer individuals.

IN PRACTICE:

“[The study] findings underscore important implications for diabetes management in patients nearing the end of life. With ~70% of patients with T2D using at least one antidiabetes medication, there is a need to consider further de-escalation or deprescribing in this vulnerable population,” the authors wrote.

SOURCE:

The study was led by Alexander Kutz, MD, MPH, MSc, Division of Pharmacoepidemiology and Pharmacoeconomics, Department of Medicine, Brigham and Women’s Hospital and Harvard Medical School, Boston, and was published online in Diabetes Care.

LIMITATIONS:

The study lacked details on the reasons for changes in medication patterns, making it unclear whether these changes were due to clinical guidelines or to reduce adverse events. Moreover, the study could not capture transitions or substitutions between medications, information on the dosage data, and causes of death.

DISCLOSURES:

This study was supported by the Division of Pharmacoepidemiology and Pharmacoeconomics, Department of Medicine, Brigham and Women’s Hospital, Harvard Medical School. Some authors reported receiving personal fees or research grants from the National Institutes of Health and other institutions and a few pharmaceutical companies. One author reported acting as a principal investigator and receiving a research grant from Boehringer-Ingelheim, unrelated to the work.

 

This article was created using several editorial tools, including AI, as part of the process. Human editors reviewed this content before publication. A version of this article appeared on Medscape.com.

TOPLINE:

Among older adults with type 2 diabetes (T2D), the use of antidiabetes medications declined in the last year before death, with notable shifts from metformin and sulfonylureas toward insulin therapy.

METHODOLOGY:

Current recommendations emphasize a more liberal approach to glycemic control in people with a high burden of comorbidities and shorter life expectancy, but little is known about the changes and discontinuation patterns of diabetes medications among older adults near the end of life.

Researchers conducted an observational cohort study to assess the prescribing trends of antidiabetes medications in the final year of life among 975,407 community-dwelling Medicare beneficiaries with T2D (mean age at death, 80.9 years; 54.3% women) who died between January 2015 and December 2019.

All medication classes available during the study period were considered, including short-acting and long-acting insulins, metformin, sulfonylureas, dipeptidyl peptidase-4 inhibitors, glucagon-like peptide 1 (GLP-1) receptor agonists, sodium-glucose cotransporter-2 (SGLT2) inhibitors, and other medications.

Analysis included temporal trends in prescribing antidiabetes medications, stratified by frailty using a validated claims-based frailty index, with scores ≥ 0.30 indicating higher frailty.

Antidiabetes medication fills were assessed within 1 year before death, examining changes across three time periods: 12 to 8 months, 8 to 4 months, and 4 to 0 months before death.

TAKEAWAY:

The proportion of older patients receiving antidiabetes medications increased slightly from 71.4% in 2015 to 72.9% in 2019, with metformin showing the largest increase from 40.7% to 46.5% (standardized mean difference [SMD], −0.12) and sulfonylureas showing the largest decrease from 37.0% to 31.8% (SMD, 0.11).

The use of newer diabetes medications with cardiovascular benefits, such as GLP-1 receptor agonists and SGLT2 inhibitors, remained less common but showed increasing trends over time.

The use of any antidiabetes medication decreased from 66.1% in the 9 to 12 months before death to 60.8% in the last 4 months of life (P < .01), primarily due to the reduced use of metformin and sulfonylureas.

The use of both short-acting and long-acting insulin agents increased toward the end of life (from 28.0% to 32.9% and from 41.2% to 43.9%, respectively; both P < .001) , particularly among frailer individuals.

IN PRACTICE:

“[The study] findings underscore important implications for diabetes management in patients nearing the end of life. With ~70% of patients with T2D using at least one antidiabetes medication, there is a need to consider further de-escalation or deprescribing in this vulnerable population,” the authors wrote.

SOURCE:

The study was led by Alexander Kutz, MD, MPH, MSc, Division of Pharmacoepidemiology and Pharmacoeconomics, Department of Medicine, Brigham and Women’s Hospital and Harvard Medical School, Boston, and was published online in Diabetes Care.

LIMITATIONS:

The study lacked details on the reasons for changes in medication patterns, making it unclear whether these changes were due to clinical guidelines or to reduce adverse events. Moreover, the study could not capture transitions or substitutions between medications, information on the dosage data, and causes of death.

DISCLOSURES:

This study was supported by the Division of Pharmacoepidemiology and Pharmacoeconomics, Department of Medicine, Brigham and Women’s Hospital, Harvard Medical School. Some authors reported receiving personal fees or research grants from the National Institutes of Health and other institutions and a few pharmaceutical companies. One author reported acting as a principal investigator and receiving a research grant from Boehringer-Ingelheim, unrelated to the work.

 

This article was created using several editorial tools, including AI, as part of the process. Human editors reviewed this content before publication. A version of this article appeared on Medscape.com.

Mild traumatic brain injury (TBI) may reactivate latent herpes simplex virus type 1 (HSV-1) in the brain and contribute to neurodegeneration and development of Alzheimer’s disease pathology, a new study suggested.

Using a three-dimensional (3D) human brain tissue model, researchers observed that quiescent HSV-1 can be reactivated by a mechanical jolt mimicking concussion, leading to signature markers of Alzheimer’s disease, including neuroinflammation and production of amyloid beta and phosphorylated tau (p-tau) and gliosis — a phenotype made worse by repeated head injury.

“This opens the question as to whether antiviral drugs or anti-inflammatory agents might be useful as early preventive treatments after head trauma to stop HSV-1 activation in its tracks and lower the risk of Alzheimer’s disease,” lead investigator Dana Cairns, PhD, with the Department of Biomedical Engineering at Tufts University, Medford, Massachusetts, said in a statement.

But outside experts urged caution in drawing any firm conclusions, pending further study.

The study was published online in the journal Science Signaling.

 

HSV-1: A Major Alzheimer’s Disease Risk Factor?

TBI is a major risk factor for Alzheimer’s disease and dementia, but the pathways in the brain leading from TBI to dementia are unknown.

HSV-1 is found in over 80% of people; varicella zoster virus (VZV) is found in about 95%. Both viruses are known to enter the brain and lay dormant in neurons and glial cells. Prior evidence indicates that HSV-1 in the brain of APOE-ε4 carriers confers a strong risk for Alzheimer’s disease.

A number of years ago, the team created a 3D model of human brain tissue to study the link between TBI, the viruses, and dementia. The model is 6 mm wide, shaped like a donut, and made of a spongy material of silk protein and collagen saturated with neural stem cells. The cells mature into neurons, communicate with each other, and form a network that mimics the brain environment.

In an earlier study using the model quiescently infected with HSV-1, Cairns and colleagues found that subsequent exposure to VZV created the inflammatory conditions that led to reactivation of HSV-1.

This led them to wonder what would happen if they subjected the brain tissue model to a physical disruption akin to a concussion. Would HSV-1 wake up and start the process of neurodegeneration?

To investigate, they examined the effects of one or more controlled blows to the 3D human brain tissue model in the absence or presence of quiescent HSV-1 infection.

After repeated, mild controlled blows, researchers found that the latently infected 3D brain tissue displayed reactivated HSV-1 and the production and accumulation of amyloid beta and p-tau — which promotes neurodegeneration. The blows also activated gliosis, which is associated with destructive neuroinflammation.

These effects are collectively associated with Alzheimer’s disease, dementia, and chronic traumatic encephalopathy, they pointed out, and were increased with additional injury but were absent in tissue not infected with HSV-1.

“These data suggest that HSV-1 in the brain is pivotal in increasing the risk of Alzheimer’s disease, as other recent studies using cerebral organoids have suggested,” the researchers wrote.

They propose that following brain injury, “whether by infection or mechanical damage, the resulting inflammation induces HSV-1 reactivation in the brain leading to the development of Alzheimer’s disease/dementia and that HSV-1 is a major cause of the disease, especially in APOE4 carriers.”

Future studies should investigate “possible ways of mitigating or stopping the damage caused by head injury, thereby reducing subsequent development of Alzheimer’s disease by implementing efforts to prevent the reactivation of virus in brain such as anti-inflammatory and/or antiviral treatment post-injury,” researchers suggested.

 

Outside Experts Weigh in

Several outside experts offered perspective on the study in a statement from the UK nonprofit Science Media Centre.

Tara Spires-Jones, PhD, president of the British Neuroscience Association and group leader at the UK Dementia Research Institute, London, England, said that, while the study is interesting, there are limitations.

“The increase in Alzheimer’s-like brain changes in these latent virus-containing cells subjected to injury does not resemble the pathology that is found in the brain of people with Alzheimer’s disease,” Spires-Jones noted.

“These experiments were also in cells grown in artificial conditions without important Alzheimer’s-related factors such as age and blood vessel changes. Finally, these experiments were repeated in a small number of experimental replicates (three times per experiment), so these results will need to be confirmed in more relevant biological systems with larger studies to be sure there is a biological link between latent herpes simplex virus type 1, brain injury, and Alzheimer’s pathology,” Spires-Jones cautioned.

Robert Howard, MD, MRCPsych, University College London (UCL) Division of Psychiatry, said the study suggests a possible mechanism for the association between HSV-1, brain injury, and Alzheimer’s disease.

“However, as so often in science, it is very important to bear in mind that association does not mean causation. Much more research will be needed before this can be seriously considered a plausible mechanism for the development of dementia,” Howard cautioned.

“Avoidance of brain injuries, such as those encountered in some contact sports, is already known to be an important way to prevent dementia, and I’m unconvinced that this reflects anything more complicated than mechanical damage causing death of brain cells,” he added.

Jennifer Pocock, PhD, with UCL Queen Square Institute of Neurology, noted the role of microglia, which are activated by mild and repetitive TBI, isn’t addressed in the study.

“This paper seems to suggest that only astrocytes contribute to the reported neuroinflammation in brain tissue. Also, the inclusion of APOE3/4 is not clearly defined. Because of this, the findings are likely to represent an over interpretation for the ‘real world’ as the inclusion of microglia may negate or accentuate them, depending on the severity of the TBI,” Pocock said.

The study was funded by the US Army Research Office and Department of Defense. The authors have declared no relevant conflicts of interest. Spires-Jones and Howard had no relevant disclosures related to this study. Pocock has received research funding from AstraZeneca and Daiichi Sankyo.

A version of this article appeared on Medscape.com.

Mild traumatic brain injury (TBI) may reactivate latent herpes simplex virus type 1 (HSV-1) in the brain and contribute to neurodegeneration and development of Alzheimer’s disease pathology, a new study suggested.

Using a three-dimensional (3D) human brain tissue model, researchers observed that quiescent HSV-1 can be reactivated by a mechanical jolt mimicking concussion, leading to signature markers of Alzheimer’s disease, including neuroinflammation and production of amyloid beta and phosphorylated tau (p-tau) and gliosis — a phenotype made worse by repeated head injury.

“This opens the question as to whether antiviral drugs or anti-inflammatory agents might be useful as early preventive treatments after head trauma to stop HSV-1 activation in its tracks and lower the risk of Alzheimer’s disease,” lead investigator Dana Cairns, PhD, with the Department of Biomedical Engineering at Tufts University, Medford, Massachusetts, said in a statement.

But outside experts urged caution in drawing any firm conclusions, pending further study.

The study was published online in the journal Science Signaling.

 

HSV-1: A Major Alzheimer’s Disease Risk Factor?

TBI is a major risk factor for Alzheimer’s disease and dementia, but the pathways in the brain leading from TBI to dementia are unknown.

HSV-1 is found in over 80% of people; varicella zoster virus (VZV) is found in about 95%. Both viruses are known to enter the brain and lay dormant in neurons and glial cells. Prior evidence indicates that HSV-1 in the brain of APOE-ε4 carriers confers a strong risk for Alzheimer’s disease.

A number of years ago, the team created a 3D model of human brain tissue to study the link between TBI, the viruses, and dementia. The model is 6 mm wide, shaped like a donut, and made of a spongy material of silk protein and collagen saturated with neural stem cells. The cells mature into neurons, communicate with each other, and form a network that mimics the brain environment.

In an earlier study using the model quiescently infected with HSV-1, Cairns and colleagues found that subsequent exposure to VZV created the inflammatory conditions that led to reactivation of HSV-1.

This led them to wonder what would happen if they subjected the brain tissue model to a physical disruption akin to a concussion. Would HSV-1 wake up and start the process of neurodegeneration?

To investigate, they examined the effects of one or more controlled blows to the 3D human brain tissue model in the absence or presence of quiescent HSV-1 infection.

After repeated, mild controlled blows, researchers found that the latently infected 3D brain tissue displayed reactivated HSV-1 and the production and accumulation of amyloid beta and p-tau — which promotes neurodegeneration. The blows also activated gliosis, which is associated with destructive neuroinflammation.

These effects are collectively associated with Alzheimer’s disease, dementia, and chronic traumatic encephalopathy, they pointed out, and were increased with additional injury but were absent in tissue not infected with HSV-1.

“These data suggest that HSV-1 in the brain is pivotal in increasing the risk of Alzheimer’s disease, as other recent studies using cerebral organoids have suggested,” the researchers wrote.

They propose that following brain injury, “whether by infection or mechanical damage, the resulting inflammation induces HSV-1 reactivation in the brain leading to the development of Alzheimer’s disease/dementia and that HSV-1 is a major cause of the disease, especially in APOE4 carriers.”

Future studies should investigate “possible ways of mitigating or stopping the damage caused by head injury, thereby reducing subsequent development of Alzheimer’s disease by implementing efforts to prevent the reactivation of virus in brain such as anti-inflammatory and/or antiviral treatment post-injury,” researchers suggested.

 

Outside Experts Weigh in

Several outside experts offered perspective on the study in a statement from the UK nonprofit Science Media Centre.

Tara Spires-Jones, PhD, president of the British Neuroscience Association and group leader at the UK Dementia Research Institute, London, England, said that, while the study is interesting, there are limitations.

“The increase in Alzheimer’s-like brain changes in these latent virus-containing cells subjected to injury does not resemble the pathology that is found in the brain of people with Alzheimer’s disease,” Spires-Jones noted.

“These experiments were also in cells grown in artificial conditions without important Alzheimer’s-related factors such as age and blood vessel changes. Finally, these experiments were repeated in a small number of experimental replicates (three times per experiment), so these results will need to be confirmed in more relevant biological systems with larger studies to be sure there is a biological link between latent herpes simplex virus type 1, brain injury, and Alzheimer’s pathology,” Spires-Jones cautioned.

Robert Howard, MD, MRCPsych, University College London (UCL) Division of Psychiatry, said the study suggests a possible mechanism for the association between HSV-1, brain injury, and Alzheimer’s disease.

“However, as so often in science, it is very important to bear in mind that association does not mean causation. Much more research will be needed before this can be seriously considered a plausible mechanism for the development of dementia,” Howard cautioned.

“Avoidance of brain injuries, such as those encountered in some contact sports, is already known to be an important way to prevent dementia, and I’m unconvinced that this reflects anything more complicated than mechanical damage causing death of brain cells,” he added.

Jennifer Pocock, PhD, with UCL Queen Square Institute of Neurology, noted the role of microglia, which are activated by mild and repetitive TBI, isn’t addressed in the study.

“This paper seems to suggest that only astrocytes contribute to the reported neuroinflammation in brain tissue. Also, the inclusion of APOE3/4 is not clearly defined. Because of this, the findings are likely to represent an over interpretation for the ‘real world’ as the inclusion of microglia may negate or accentuate them, depending on the severity of the TBI,” Pocock said.

The study was funded by the US Army Research Office and Department of Defense. The authors have declared no relevant conflicts of interest. Spires-Jones and Howard had no relevant disclosures related to this study. Pocock has received research funding from AstraZeneca and Daiichi Sankyo.

A version of this article appeared on Medscape.com.

Mild traumatic brain injury (TBI) may reactivate latent herpes simplex virus type 1 (HSV-1) in the brain and contribute to neurodegeneration and development of Alzheimer’s disease pathology, a new study suggested.

Using a three-dimensional (3D) human brain tissue model, researchers observed that quiescent HSV-1 can be reactivated by a mechanical jolt mimicking concussion, leading to signature markers of Alzheimer’s disease, including neuroinflammation and production of amyloid beta and phosphorylated tau (p-tau) and gliosis — a phenotype made worse by repeated head injury.

“This opens the question as to whether antiviral drugs or anti-inflammatory agents might be useful as early preventive treatments after head trauma to stop HSV-1 activation in its tracks and lower the risk of Alzheimer’s disease,” lead investigator Dana Cairns, PhD, with the Department of Biomedical Engineering at Tufts University, Medford, Massachusetts, said in a statement.

But outside experts urged caution in drawing any firm conclusions, pending further study.

The study was published online in the journal Science Signaling.

 

HSV-1: A Major Alzheimer’s Disease Risk Factor?

TBI is a major risk factor for Alzheimer’s disease and dementia, but the pathways in the brain leading from TBI to dementia are unknown.

HSV-1 is found in over 80% of people; varicella zoster virus (VZV) is found in about 95%. Both viruses are known to enter the brain and lay dormant in neurons and glial cells. Prior evidence indicates that HSV-1 in the brain of APOE-ε4 carriers confers a strong risk for Alzheimer’s disease.

A number of years ago, the team created a 3D model of human brain tissue to study the link between TBI, the viruses, and dementia. The model is 6 mm wide, shaped like a donut, and made of a spongy material of silk protein and collagen saturated with neural stem cells. The cells mature into neurons, communicate with each other, and form a network that mimics the brain environment.

In an earlier study using the model quiescently infected with HSV-1, Cairns and colleagues found that subsequent exposure to VZV created the inflammatory conditions that led to reactivation of HSV-1.

This led them to wonder what would happen if they subjected the brain tissue model to a physical disruption akin to a concussion. Would HSV-1 wake up and start the process of neurodegeneration?

To investigate, they examined the effects of one or more controlled blows to the 3D human brain tissue model in the absence or presence of quiescent HSV-1 infection.

After repeated, mild controlled blows, researchers found that the latently infected 3D brain tissue displayed reactivated HSV-1 and the production and accumulation of amyloid beta and p-tau — which promotes neurodegeneration. The blows also activated gliosis, which is associated with destructive neuroinflammation.

These effects are collectively associated with Alzheimer’s disease, dementia, and chronic traumatic encephalopathy, they pointed out, and were increased with additional injury but were absent in tissue not infected with HSV-1.

“These data suggest that HSV-1 in the brain is pivotal in increasing the risk of Alzheimer’s disease, as other recent studies using cerebral organoids have suggested,” the researchers wrote.

They propose that following brain injury, “whether by infection or mechanical damage, the resulting inflammation induces HSV-1 reactivation in the brain leading to the development of Alzheimer’s disease/dementia and that HSV-1 is a major cause of the disease, especially in APOE4 carriers.”

Future studies should investigate “possible ways of mitigating or stopping the damage caused by head injury, thereby reducing subsequent development of Alzheimer’s disease by implementing efforts to prevent the reactivation of virus in brain such as anti-inflammatory and/or antiviral treatment post-injury,” researchers suggested.

 

Outside Experts Weigh in

Several outside experts offered perspective on the study in a statement from the UK nonprofit Science Media Centre.

Tara Spires-Jones, PhD, president of the British Neuroscience Association and group leader at the UK Dementia Research Institute, London, England, said that, while the study is interesting, there are limitations.

“The increase in Alzheimer’s-like brain changes in these latent virus-containing cells subjected to injury does not resemble the pathology that is found in the brain of people with Alzheimer’s disease,” Spires-Jones noted.

“These experiments were also in cells grown in artificial conditions without important Alzheimer’s-related factors such as age and blood vessel changes. Finally, these experiments were repeated in a small number of experimental replicates (three times per experiment), so these results will need to be confirmed in more relevant biological systems with larger studies to be sure there is a biological link between latent herpes simplex virus type 1, brain injury, and Alzheimer’s pathology,” Spires-Jones cautioned.

Robert Howard, MD, MRCPsych, University College London (UCL) Division of Psychiatry, said the study suggests a possible mechanism for the association between HSV-1, brain injury, and Alzheimer’s disease.

“However, as so often in science, it is very important to bear in mind that association does not mean causation. Much more research will be needed before this can be seriously considered a plausible mechanism for the development of dementia,” Howard cautioned.

“Avoidance of brain injuries, such as those encountered in some contact sports, is already known to be an important way to prevent dementia, and I’m unconvinced that this reflects anything more complicated than mechanical damage causing death of brain cells,” he added.

Jennifer Pocock, PhD, with UCL Queen Square Institute of Neurology, noted the role of microglia, which are activated by mild and repetitive TBI, isn’t addressed in the study.

“This paper seems to suggest that only astrocytes contribute to the reported neuroinflammation in brain tissue. Also, the inclusion of APOE3/4 is not clearly defined. Because of this, the findings are likely to represent an over interpretation for the ‘real world’ as the inclusion of microglia may negate or accentuate them, depending on the severity of the TBI,” Pocock said.

The study was funded by the US Army Research Office and Department of Defense. The authors have declared no relevant conflicts of interest. Spires-Jones and Howard had no relevant disclosures related to this study. Pocock has received research funding from AstraZeneca and Daiichi Sankyo.

A version of this article appeared on Medscape.com.

TOPLINE:

Different Kirsten rat sarcoma virus (KRAS) mutations in pancreatic ductal adenocarcinoma show varying treatment responses, with G12D and G12V mutations linked to worse outcomes compared with wild type.

METHODOLOGY:

• Researchers conducted a retrospective cohort study analyzing deidentified clinical data from 2,433 patients with metastatic pancreatic ductal adenocarcinoma (PDAC), diagnosed between February 2010 and September 2022.
• They assessed the association of KRAS mutations in metastatic PDAC with the clinical outcomes and responses to first-line chemotherapy regimens.
• Data originated from approximately 280 US cancer clinics, encompassing about 800 sites of care, with comprehensive genomic profiling performed on all patients.
• Analysis focused on median overall survival (OS) and time to next treatment (TTNT) across different KRAS mutation groups, using multivariate Cox proportional hazards models.

TAKEAWAY:

• Patients with KRAS G12D and G12V mutations showed significantly higher risk for disease progression (hazard ratio [HR], 1.15; 95% CI, 1.04-1.29; P = .009) and (HR, 1.16; 95% CI, 1.04-1.30; P = .01), respectively, compared with KRAS wild type.
• KRAS G12R mutations were associated with the longest median OS at 13.2 months (95% CI, 10.6-15.2) and longest median TTNT at 6.0 months (95% CI, 5.2-6.6).
• FOLFIRINOX treatment demonstrated better outcomes than gemcitabine-based therapies across all patients, with lower risk for treatment progression (HR, 1.19; 95% CI, 1.09-1.29; P < .001) and death (HR, 1.18; 95% CI, 1.07-1.29; P < .001).
• Specifically, when FOLFIRINOX was used as first-line treatment in patients with KRAS G12D and G12V mutations, the therapy was associated with improved TTNT and OS vs gemcitabine with or without nab-paclitaxel.

IN PRACTICE:

“In its totality, these data set a benchmark for future studies on KRAS inhibitors for specific KRAS variants and highlights the groups for which treatment combinations may ultimately be necessary,” the authors concluded.

SOURCE:

The study was led by Carter Norton, Huntsman Cancer Institute in Salt Lake City, Utah. It was published online on January 7 in JAMA Network Open.

LIMITATIONS:

According to the authors, the study’s limitations include the heterogeneity of clinical data collected retrospectively, which is subject to residual confounding. The sample size was limited for certain mutational groups, particularly KRAS G12C, leading to limited statistical power. Additionally, the detection rate of genomic alterations by commercially available assays may be affected by the high stromal content and low cellularity characteristic of PDAC.

DISCLOSURES:

The study was supported by Cancer Center Support grant P30CA042014 from the National Institutes of Health. Heloisa P. Soares, MD, PhD, one of the study authors, disclosed receiving consulting fees from Ipsen, Exelixis Inc, BMS, Novartis AG, AstraZeneca, and TerSera Therapeutics LLC and symposium speaker fees from ITM Radiopharma outside the submitted work. Additional disclosures are noted in the original article.

 

This article was created using several editorial tools, including AI, as part of the process. Human editors reviewed this content before publication. A version of this article appeared on Medscape.com.

TOPLINE:

Different Kirsten rat sarcoma virus (KRAS) mutations in pancreatic ductal adenocarcinoma show varying treatment responses, with G12D and G12V mutations linked to worse outcomes compared with wild type.

METHODOLOGY:

• Researchers conducted a retrospective cohort study analyzing deidentified clinical data from 2,433 patients with metastatic pancreatic ductal adenocarcinoma (PDAC), diagnosed between February 2010 and September 2022.
• They assessed the association of KRAS mutations in metastatic PDAC with the clinical outcomes and responses to first-line chemotherapy regimens.
• Data originated from approximately 280 US cancer clinics, encompassing about 800 sites of care, with comprehensive genomic profiling performed on all patients.
• Analysis focused on median overall survival (OS) and time to next treatment (TTNT) across different KRAS mutation groups, using multivariate Cox proportional hazards models.

TAKEAWAY:

• Patients with KRAS G12D and G12V mutations showed significantly higher risk for disease progression (hazard ratio [HR], 1.15; 95% CI, 1.04-1.29; P = .009) and (HR, 1.16; 95% CI, 1.04-1.30; P = .01), respectively, compared with KRAS wild type.
• KRAS G12R mutations were associated with the longest median OS at 13.2 months (95% CI, 10.6-15.2) and longest median TTNT at 6.0 months (95% CI, 5.2-6.6).
• FOLFIRINOX treatment demonstrated better outcomes than gemcitabine-based therapies across all patients, with lower risk for treatment progression (HR, 1.19; 95% CI, 1.09-1.29; P < .001) and death (HR, 1.18; 95% CI, 1.07-1.29; P < .001).
• Specifically, when FOLFIRINOX was used as first-line treatment in patients with KRAS G12D and G12V mutations, the therapy was associated with improved TTNT and OS vs gemcitabine with or without nab-paclitaxel.

IN PRACTICE:

“In its totality, these data set a benchmark for future studies on KRAS inhibitors for specific KRAS variants and highlights the groups for which treatment combinations may ultimately be necessary,” the authors concluded.

SOURCE:

The study was led by Carter Norton, Huntsman Cancer Institute in Salt Lake City, Utah. It was published online on January 7 in JAMA Network Open.

LIMITATIONS:

According to the authors, the study’s limitations include the heterogeneity of clinical data collected retrospectively, which is subject to residual confounding. The sample size was limited for certain mutational groups, particularly KRAS G12C, leading to limited statistical power. Additionally, the detection rate of genomic alterations by commercially available assays may be affected by the high stromal content and low cellularity characteristic of PDAC.

DISCLOSURES:

The study was supported by Cancer Center Support grant P30CA042014 from the National Institutes of Health. Heloisa P. Soares, MD, PhD, one of the study authors, disclosed receiving consulting fees from Ipsen, Exelixis Inc, BMS, Novartis AG, AstraZeneca, and TerSera Therapeutics LLC and symposium speaker fees from ITM Radiopharma outside the submitted work. Additional disclosures are noted in the original article.

 

This article was created using several editorial tools, including AI, as part of the process. Human editors reviewed this content before publication. A version of this article appeared on Medscape.com.

TOPLINE:

Different Kirsten rat sarcoma virus (KRAS) mutations in pancreatic ductal adenocarcinoma show varying treatment responses, with G12D and G12V mutations linked to worse outcomes compared with wild type.

METHODOLOGY:

• Researchers conducted a retrospective cohort study analyzing deidentified clinical data from 2,433 patients with metastatic pancreatic ductal adenocarcinoma (PDAC), diagnosed between February 2010 and September 2022.
• They assessed the association of KRAS mutations in metastatic PDAC with the clinical outcomes and responses to first-line chemotherapy regimens.
• Data originated from approximately 280 US cancer clinics, encompassing about 800 sites of care, with comprehensive genomic profiling performed on all patients.
• Analysis focused on median overall survival (OS) and time to next treatment (TTNT) across different KRAS mutation groups, using multivariate Cox proportional hazards models.

TAKEAWAY:

• Patients with KRAS G12D and G12V mutations showed significantly higher risk for disease progression (hazard ratio [HR], 1.15; 95% CI, 1.04-1.29; P = .009) and (HR, 1.16; 95% CI, 1.04-1.30; P = .01), respectively, compared with KRAS wild type.
• KRAS G12R mutations were associated with the longest median OS at 13.2 months (95% CI, 10.6-15.2) and longest median TTNT at 6.0 months (95% CI, 5.2-6.6).
• FOLFIRINOX treatment demonstrated better outcomes than gemcitabine-based therapies across all patients, with lower risk for treatment progression (HR, 1.19; 95% CI, 1.09-1.29; P < .001) and death (HR, 1.18; 95% CI, 1.07-1.29; P < .001).
• Specifically, when FOLFIRINOX was used as first-line treatment in patients with KRAS G12D and G12V mutations, the therapy was associated with improved TTNT and OS vs gemcitabine with or without nab-paclitaxel.

IN PRACTICE:

“In its totality, these data set a benchmark for future studies on KRAS inhibitors for specific KRAS variants and highlights the groups for which treatment combinations may ultimately be necessary,” the authors concluded.

SOURCE:

The study was led by Carter Norton, Huntsman Cancer Institute in Salt Lake City, Utah. It was published online on January 7 in JAMA Network Open.

LIMITATIONS:

According to the authors, the study’s limitations include the heterogeneity of clinical data collected retrospectively, which is subject to residual confounding. The sample size was limited for certain mutational groups, particularly KRAS G12C, leading to limited statistical power. Additionally, the detection rate of genomic alterations by commercially available assays may be affected by the high stromal content and low cellularity characteristic of PDAC.

DISCLOSURES:

The study was supported by Cancer Center Support grant P30CA042014 from the National Institutes of Health. Heloisa P. Soares, MD, PhD, one of the study authors, disclosed receiving consulting fees from Ipsen, Exelixis Inc, BMS, Novartis AG, AstraZeneca, and TerSera Therapeutics LLC and symposium speaker fees from ITM Radiopharma outside the submitted work. Additional disclosures are noted in the original article.

 

This article was created using several editorial tools, including AI, as part of the process. Human editors reviewed this content before publication. A version of this article appeared on Medscape.com.

A new light therapy device could be a game-changer for millions at risk of vision loss. The Food and Drug Administration (FDA) has approved a first-of-its-kind treatment for dry age-related macular degeneration (AMD), a leading cause of blindness in adults over 55.

Developed by LumiThera, the device showed promising results in a clinical trial, marking it as the first effective therapy for AMD. Approved under the FDA’s “De Novo” process, the treatment offers hope where no similar options existed.

The LumiThera study, done at 10 retinal centers in the United States, assessed the safety and effectiveness of the system on the eyes of 100 people over a 24-month period. The data collected during the trial was then analyzed over a 13-month period. 

The trial found that LumiThera’s Valeda Light Delivery System significantly reduced the risk of vision loss and the start of geographic atrophy in dry AMD. More than 58% of the people studied reported improvements in their sight after the therapy. 

Geographic atrophy is a treacherous hallmark of late-stage dry AMD, in which cells in the center of the eye’s retina — called the macula — die, which can cause severe vision loss in advanced forms of the disease.

LumiThera’s system is the first treatment authorized by the FDA for vision loss from dry AMD. AMD is a leading cause of irreversible blindness or vision loss in people over 60. Around 20 million people in the United States have AMD, with dry AMD accounting for 90% of diagnosed cases. It’s considered “dry” because it doesn’t involve the growth of abnormal blood vessels, the way the “wet” form of AMD does.

The percentage of people with dry AMD who lose their vision depends on how severe the disease is and whether it becomes the wet form, which is more severe than the dry form. The wet form is marked by blood vessels leaking into the macula and the loss of central vision. Around 10%-15% of dry AMD cases become the wet form. 

During a presentation in 2024 at a meeting of the American Society of Retina Specialists, Eleonora Lad, MD, PhD, vice chair of ophthalmology clinical research at Duke University Medical Center, said the treatment — known as “photobiomodulation” (PBM) — is the first to deliver “meaningful effects” in dry AMD.

But how does PBM work, and what specifically improved in the eyes of the people in the study to help combat the disease?

 

Specific Wavelengths of Light Improve Cellular Function

Until now, taking nutritional supplements (vitamin C, vitamin E, lutein, zeaxanthin, zinc, and copper) was among the most common ways of treating dry AMD. The efficacy with this combo of nutritional supplements was established by the Age-Related Eye Disease Study 2 (AREDS2). The supplements help lower the risk of advanced dry AMD and wet AMD. 

There are also recently approved eye injections for dry AMD, such as the drugs Syfovre and Izervay, to treat later stages of the disease. But while both Syfovre and Izervay can slow the progression of geographic atrophy by about 14%-20%, patients receiving either drug have a higher risk of getting wet AMD, and the treatments are invasive. The drugs must be injected directly into the middle of the eye around once per month. 

PBM works by delivering specific wavelengths of light to the retina that help cells in retinal tissue, increasing energy production by mitochondria in eye cells, decreasing inflammation, and increasing nutrients and oxygen for cells. This improves cell survival in dry AMD and could slow the disease or stop it from reaching later stages.

Several eye disorders may be partly caused by oxidative stress and impaired mitochondrial function. The wavelength of light used in PBM stimulates an enzyme in eye cells that is key to healthy cellular function and vision. 

Research has shown that PBM prevents oxidative stress, which damages retinal pigment epithelial cells and could lead to AMD.

 

More Study Is Needed

PBM has been around for decades and has been promoted as a treatment for dementia, smoking cessation, spinal cord injury, and wound healing, along with AMD. 

“Google photobiomodulation or light therapy, and you’ll find it’s supposed to fix everything ... people try to sell it for everything, and that’s because they own the equipment, and they’re looking to recoup their costs,” said Jason M. Miller, MD, PhD, a retinal disease specialist at the Kellogg Eye Center at the University of Michigan School of Medicine, Ann Arbor.

He said more rigorous and larger trials are need before PBM therapy should gain wider FDA approval.

The FDA’s De Novo approval process is for medical devices that have designs that are unlike others already on the market. To get full approval from the FDA, a new drug or device must be assessed in a clinical trial that involves more people than the 100 or so that LumiThera used in its trial. For example, phase 3 trials for drugs usually involve 1,000-3,000 people.

Syfovre’s phase 3 clinical trials involved 1,258 patients. 

Research has shown that perceptions of visual acuity could also color the study results in a way that distorts the actual effectiveness of treatment, the way the placebo effect works. Some people in studies may simply think their vision is improving because they know they’re getting treatment. 

In a 2022 study, researchers showed that people in a trial who were given a placebo with the expectation the treatment would work reported a more favorable response to treatment than those who received a “nocebo” they were told wouldn’t work. 

The sensitivity of response to the placebo/nocebo treatments were shown to rely on the expectations caused by the experiment, and the study’s findings provided evidence that “both ocular accommodation and stereoacuity can be influenced by manipulating expectations and belief about the efficacy of an inert treatment.”

“The placebo effect in medicine is just rampant. It accounts for, in some trials, 30%-40% of an effect. ... I would have a hard time buying this device right now. I don’t want to say it’s ineffective, I just want more data,” said Miller.

A version of this article appeared on WebMD.com.

A new light therapy device could be a game-changer for millions at risk of vision loss. The Food and Drug Administration (FDA) has approved a first-of-its-kind treatment for dry age-related macular degeneration (AMD), a leading cause of blindness in adults over 55.

Developed by LumiThera, the device showed promising results in a clinical trial, marking it as the first effective therapy for AMD. Approved under the FDA’s “De Novo” process, the treatment offers hope where no similar options existed.

The LumiThera study, done at 10 retinal centers in the United States, assessed the safety and effectiveness of the system on the eyes of 100 people over a 24-month period. The data collected during the trial was then analyzed over a 13-month period. 

The trial found that LumiThera’s Valeda Light Delivery System significantly reduced the risk of vision loss and the start of geographic atrophy in dry AMD. More than 58% of the people studied reported improvements in their sight after the therapy. 

Geographic atrophy is a treacherous hallmark of late-stage dry AMD, in which cells in the center of the eye’s retina — called the macula — die, which can cause severe vision loss in advanced forms of the disease.

LumiThera’s system is the first treatment authorized by the FDA for vision loss from dry AMD. AMD is a leading cause of irreversible blindness or vision loss in people over 60. Around 20 million people in the United States have AMD, with dry AMD accounting for 90% of diagnosed cases. It’s considered “dry” because it doesn’t involve the growth of abnormal blood vessels, the way the “wet” form of AMD does.

The percentage of people with dry AMD who lose their vision depends on how severe the disease is and whether it becomes the wet form, which is more severe than the dry form. The wet form is marked by blood vessels leaking into the macula and the loss of central vision. Around 10%-15% of dry AMD cases become the wet form. 

During a presentation in 2024 at a meeting of the American Society of Retina Specialists, Eleonora Lad, MD, PhD, vice chair of ophthalmology clinical research at Duke University Medical Center, said the treatment — known as “photobiomodulation” (PBM) — is the first to deliver “meaningful effects” in dry AMD.

But how does PBM work, and what specifically improved in the eyes of the people in the study to help combat the disease?

 

Specific Wavelengths of Light Improve Cellular Function

Until now, taking nutritional supplements (vitamin C, vitamin E, lutein, zeaxanthin, zinc, and copper) was among the most common ways of treating dry AMD. The efficacy with this combo of nutritional supplements was established by the Age-Related Eye Disease Study 2 (AREDS2). The supplements help lower the risk of advanced dry AMD and wet AMD. 

There are also recently approved eye injections for dry AMD, such as the drugs Syfovre and Izervay, to treat later stages of the disease. But while both Syfovre and Izervay can slow the progression of geographic atrophy by about 14%-20%, patients receiving either drug have a higher risk of getting wet AMD, and the treatments are invasive. The drugs must be injected directly into the middle of the eye around once per month. 

PBM works by delivering specific wavelengths of light to the retina that help cells in retinal tissue, increasing energy production by mitochondria in eye cells, decreasing inflammation, and increasing nutrients and oxygen for cells. This improves cell survival in dry AMD and could slow the disease or stop it from reaching later stages.

Several eye disorders may be partly caused by oxidative stress and impaired mitochondrial function. The wavelength of light used in PBM stimulates an enzyme in eye cells that is key to healthy cellular function and vision. 

Research has shown that PBM prevents oxidative stress, which damages retinal pigment epithelial cells and could lead to AMD.

 

More Study Is Needed

PBM has been around for decades and has been promoted as a treatment for dementia, smoking cessation, spinal cord injury, and wound healing, along with AMD. 

“Google photobiomodulation or light therapy, and you’ll find it’s supposed to fix everything ... people try to sell it for everything, and that’s because they own the equipment, and they’re looking to recoup their costs,” said Jason M. Miller, MD, PhD, a retinal disease specialist at the Kellogg Eye Center at the University of Michigan School of Medicine, Ann Arbor.

He said more rigorous and larger trials are need before PBM therapy should gain wider FDA approval.

The FDA’s De Novo approval process is for medical devices that have designs that are unlike others already on the market. To get full approval from the FDA, a new drug or device must be assessed in a clinical trial that involves more people than the 100 or so that LumiThera used in its trial. For example, phase 3 trials for drugs usually involve 1,000-3,000 people.

Syfovre’s phase 3 clinical trials involved 1,258 patients. 

Research has shown that perceptions of visual acuity could also color the study results in a way that distorts the actual effectiveness of treatment, the way the placebo effect works. Some people in studies may simply think their vision is improving because they know they’re getting treatment. 

In a 2022 study, researchers showed that people in a trial who were given a placebo with the expectation the treatment would work reported a more favorable response to treatment than those who received a “nocebo” they were told wouldn’t work. 

The sensitivity of response to the placebo/nocebo treatments were shown to rely on the expectations caused by the experiment, and the study’s findings provided evidence that “both ocular accommodation and stereoacuity can be influenced by manipulating expectations and belief about the efficacy of an inert treatment.”

“The placebo effect in medicine is just rampant. It accounts for, in some trials, 30%-40% of an effect. ... I would have a hard time buying this device right now. I don’t want to say it’s ineffective, I just want more data,” said Miller.

A version of this article appeared on WebMD.com.

A new light therapy device could be a game-changer for millions at risk of vision loss. The Food and Drug Administration (FDA) has approved a first-of-its-kind treatment for dry age-related macular degeneration (AMD), a leading cause of blindness in adults over 55.

Developed by LumiThera, the device showed promising results in a clinical trial, marking it as the first effective therapy for AMD. Approved under the FDA’s “De Novo” process, the treatment offers hope where no similar options existed.

The LumiThera study, done at 10 retinal centers in the United States, assessed the safety and effectiveness of the system on the eyes of 100 people over a 24-month period. The data collected during the trial was then analyzed over a 13-month period. 

The trial found that LumiThera’s Valeda Light Delivery System significantly reduced the risk of vision loss and the start of geographic atrophy in dry AMD. More than 58% of the people studied reported improvements in their sight after the therapy. 

Geographic atrophy is a treacherous hallmark of late-stage dry AMD, in which cells in the center of the eye’s retina — called the macula — die, which can cause severe vision loss in advanced forms of the disease.

LumiThera’s system is the first treatment authorized by the FDA for vision loss from dry AMD. AMD is a leading cause of irreversible blindness or vision loss in people over 60. Around 20 million people in the United States have AMD, with dry AMD accounting for 90% of diagnosed cases. It’s considered “dry” because it doesn’t involve the growth of abnormal blood vessels, the way the “wet” form of AMD does.

The percentage of people with dry AMD who lose their vision depends on how severe the disease is and whether it becomes the wet form, which is more severe than the dry form. The wet form is marked by blood vessels leaking into the macula and the loss of central vision. Around 10%-15% of dry AMD cases become the wet form. 

During a presentation in 2024 at a meeting of the American Society of Retina Specialists, Eleonora Lad, MD, PhD, vice chair of ophthalmology clinical research at Duke University Medical Center, said the treatment — known as “photobiomodulation” (PBM) — is the first to deliver “meaningful effects” in dry AMD.

But how does PBM work, and what specifically improved in the eyes of the people in the study to help combat the disease?

 

Specific Wavelengths of Light Improve Cellular Function

Until now, taking nutritional supplements (vitamin C, vitamin E, lutein, zeaxanthin, zinc, and copper) was among the most common ways of treating dry AMD. The efficacy with this combo of nutritional supplements was established by the Age-Related Eye Disease Study 2 (AREDS2). The supplements help lower the risk of advanced dry AMD and wet AMD. 

There are also recently approved eye injections for dry AMD, such as the drugs Syfovre and Izervay, to treat later stages of the disease. But while both Syfovre and Izervay can slow the progression of geographic atrophy by about 14%-20%, patients receiving either drug have a higher risk of getting wet AMD, and the treatments are invasive. The drugs must be injected directly into the middle of the eye around once per month. 

PBM works by delivering specific wavelengths of light to the retina that help cells in retinal tissue, increasing energy production by mitochondria in eye cells, decreasing inflammation, and increasing nutrients and oxygen for cells. This improves cell survival in dry AMD and could slow the disease or stop it from reaching later stages.

Several eye disorders may be partly caused by oxidative stress and impaired mitochondrial function. The wavelength of light used in PBM stimulates an enzyme in eye cells that is key to healthy cellular function and vision. 

Research has shown that PBM prevents oxidative stress, which damages retinal pigment epithelial cells and could lead to AMD.

 

More Study Is Needed

PBM has been around for decades and has been promoted as a treatment for dementia, smoking cessation, spinal cord injury, and wound healing, along with AMD. 

“Google photobiomodulation or light therapy, and you’ll find it’s supposed to fix everything ... people try to sell it for everything, and that’s because they own the equipment, and they’re looking to recoup their costs,” said Jason M. Miller, MD, PhD, a retinal disease specialist at the Kellogg Eye Center at the University of Michigan School of Medicine, Ann Arbor.

He said more rigorous and larger trials are need before PBM therapy should gain wider FDA approval.

The FDA’s De Novo approval process is for medical devices that have designs that are unlike others already on the market. To get full approval from the FDA, a new drug or device must be assessed in a clinical trial that involves more people than the 100 or so that LumiThera used in its trial. For example, phase 3 trials for drugs usually involve 1,000-3,000 people.

Syfovre’s phase 3 clinical trials involved 1,258 patients. 

Research has shown that perceptions of visual acuity could also color the study results in a way that distorts the actual effectiveness of treatment, the way the placebo effect works. Some people in studies may simply think their vision is improving because they know they’re getting treatment. 

In a 2022 study, researchers showed that people in a trial who were given a placebo with the expectation the treatment would work reported a more favorable response to treatment than those who received a “nocebo” they were told wouldn’t work. 

The sensitivity of response to the placebo/nocebo treatments were shown to rely on the expectations caused by the experiment, and the study’s findings provided evidence that “both ocular accommodation and stereoacuity can be influenced by manipulating expectations and belief about the efficacy of an inert treatment.”

“The placebo effect in medicine is just rampant. It accounts for, in some trials, 30%-40% of an effect. ... I would have a hard time buying this device right now. I don’t want to say it’s ineffective, I just want more data,” said Miller.

A version of this article appeared on WebMD.com.