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Few meet eligibility for newer Alzheimer’s drugs
, a cross sectional study has found.
Reporting in the journal Neurology, researchers from the Mayo Clinic in Rochester, Minn., and the University of Chicago found that only a small percentage of patients in the Mayo Clinic Study of Aging (MCSA) with mild cognitive impairment (MCI) or mild dementia due to Alzheimer’s disease would meet the clinical trial eligibility requirements of either agent.
“Our study results show only a small percentage of people with early Alzheimer’s disease may be eligible to receive treatment, mostly due to chronic health conditions and brain scan abnormalities common in older adults,” said lead researcher Maria Vassilaki, MD, PhD, an epidemiologist at Mayo Clinic in Rochester, Minn.
Applying clinical trial exclusion criteria to a broader population
The study included 237 people aged 50-90, 222 who had MCI and 15 with mild dementia, and whose brain scans showed increased amounts of amyloid-beta plaques. Average age of the participants was 80.9 years and 97.5% were White (99.6% not Hispanic or Latino).
The researchers then looked at the eligibility criteria for the pivotal clinical trials for lecanemab, which the U.S. Food and Drug Administration approved in January this year, and aducanumab, which the FDA cleared in 2021. Both drugs received FDA accelerated approval.
For lecanemab, clinical trial inclusion required specific scores for the Clinical Dementia Rating (CDR) (other than 0.5 or 1.0), Wechsler Memory Scale (WMS-R) Logical Memory II (which varied with age group), or Mini-Mental State Examination (MMSE) (22 to 30). A body mass index between 17 and 35 kg/m2 was also an inclusion criteria. Only 112 people, or 47%, met the inclusion criteria. Exclusion criteria included a history of cardiovascular disease or cancer, Parkinson’s disease, or brain injury, or a positive brain scan. When the exclusion criteria were applied, only 19 people, or 8%, qualified for the lecanemab trial.
When the researchers modified the exclusion criteria to include all study participants with MCI but not applying results from additional cognitive tests, 17.4% of MCSA patients would have been eligible for the lecanemab trial.
Aducanumab clinical trial inclusion criteria were a CDR global score other than 0.5 and an MMSE below 24, with an age cutoff of 85 years. Only 104 of the MCSA population, or 44%, met the clinical trial criteria. When the researchers applied the exclusion criteria for cardiovascular disease, central nervous system-related exclusions (such as brain cancer or epilepsy), a history of cancer, or brain scan abnormalities, they found that only 12 people, or 5%, would have been eligible for an aducanumab trial.
“Clinical trials often have strict eligibility criteria and could exclude those with other conditions that could be common in older adults,” Dr. Vassilaki said in emailed comments. “Thus, we wanted to examine if we apply these criteria to a study that recruits participants from the community, how many of the individuals in the early symptomatic stages, mild cognitive impairment or mild dementia due to Alzheimer’s disease, would be eligible for the treatment.”
Dr. Vassilaki said these drugs need to be studied in larger, more diverse populations, as well as in less healthy populations, before they’re more widely available to people with Alzheimer’s disease. “In addition,” she said, “we can learn more from the postmarketing surveillance of side effects and also from registries of patients receiving these treatments.”
One limitation of the study Dr. Vassilaki pointed out is the overwhelmingly White population. Evaluating the clinical trial eligibility criteria in more diverse populations is crucial, she said.
Estimating the number of patients who would qualify for treatment
In an accompanying commentary, Matthew Howes, MD, of Butler Hospital and Brown University in Providence, R.I., and colleagues wrote that the study findings provide health systems planning to offer amyloid-lowering antibodies for Alzheimer’s disease an estimate of how many patients would be eligible for the treatments. “Providers must exercise clinical judgment in selecting patients for treatment with shared decision-making with patients and families,” the commentators wrote.
The study was supported by the National Institutes of Health, the National Institute on Aging, the Alexander Family Alzheimer’s Disease Research Professorship of the Mayo Clinic, the Mayo Foundation for Medical Education and Research, the Liston Award, the GHR Foundation, and the Schuler Foundation. Dr. Vassilaki disclosed relationships with F. Hoffmann-La Roche, Abbott Laboratories, Johnson & Johnson, Medtronic, Merck, and Amgen. Dr. Howe has no relevant disclosures.
, a cross sectional study has found.
Reporting in the journal Neurology, researchers from the Mayo Clinic in Rochester, Minn., and the University of Chicago found that only a small percentage of patients in the Mayo Clinic Study of Aging (MCSA) with mild cognitive impairment (MCI) or mild dementia due to Alzheimer’s disease would meet the clinical trial eligibility requirements of either agent.
“Our study results show only a small percentage of people with early Alzheimer’s disease may be eligible to receive treatment, mostly due to chronic health conditions and brain scan abnormalities common in older adults,” said lead researcher Maria Vassilaki, MD, PhD, an epidemiologist at Mayo Clinic in Rochester, Minn.
Applying clinical trial exclusion criteria to a broader population
The study included 237 people aged 50-90, 222 who had MCI and 15 with mild dementia, and whose brain scans showed increased amounts of amyloid-beta plaques. Average age of the participants was 80.9 years and 97.5% were White (99.6% not Hispanic or Latino).
The researchers then looked at the eligibility criteria for the pivotal clinical trials for lecanemab, which the U.S. Food and Drug Administration approved in January this year, and aducanumab, which the FDA cleared in 2021. Both drugs received FDA accelerated approval.
For lecanemab, clinical trial inclusion required specific scores for the Clinical Dementia Rating (CDR) (other than 0.5 or 1.0), Wechsler Memory Scale (WMS-R) Logical Memory II (which varied with age group), or Mini-Mental State Examination (MMSE) (22 to 30). A body mass index between 17 and 35 kg/m2 was also an inclusion criteria. Only 112 people, or 47%, met the inclusion criteria. Exclusion criteria included a history of cardiovascular disease or cancer, Parkinson’s disease, or brain injury, or a positive brain scan. When the exclusion criteria were applied, only 19 people, or 8%, qualified for the lecanemab trial.
When the researchers modified the exclusion criteria to include all study participants with MCI but not applying results from additional cognitive tests, 17.4% of MCSA patients would have been eligible for the lecanemab trial.
Aducanumab clinical trial inclusion criteria were a CDR global score other than 0.5 and an MMSE below 24, with an age cutoff of 85 years. Only 104 of the MCSA population, or 44%, met the clinical trial criteria. When the researchers applied the exclusion criteria for cardiovascular disease, central nervous system-related exclusions (such as brain cancer or epilepsy), a history of cancer, or brain scan abnormalities, they found that only 12 people, or 5%, would have been eligible for an aducanumab trial.
“Clinical trials often have strict eligibility criteria and could exclude those with other conditions that could be common in older adults,” Dr. Vassilaki said in emailed comments. “Thus, we wanted to examine if we apply these criteria to a study that recruits participants from the community, how many of the individuals in the early symptomatic stages, mild cognitive impairment or mild dementia due to Alzheimer’s disease, would be eligible for the treatment.”
Dr. Vassilaki said these drugs need to be studied in larger, more diverse populations, as well as in less healthy populations, before they’re more widely available to people with Alzheimer’s disease. “In addition,” she said, “we can learn more from the postmarketing surveillance of side effects and also from registries of patients receiving these treatments.”
One limitation of the study Dr. Vassilaki pointed out is the overwhelmingly White population. Evaluating the clinical trial eligibility criteria in more diverse populations is crucial, she said.
Estimating the number of patients who would qualify for treatment
In an accompanying commentary, Matthew Howes, MD, of Butler Hospital and Brown University in Providence, R.I., and colleagues wrote that the study findings provide health systems planning to offer amyloid-lowering antibodies for Alzheimer’s disease an estimate of how many patients would be eligible for the treatments. “Providers must exercise clinical judgment in selecting patients for treatment with shared decision-making with patients and families,” the commentators wrote.
The study was supported by the National Institutes of Health, the National Institute on Aging, the Alexander Family Alzheimer’s Disease Research Professorship of the Mayo Clinic, the Mayo Foundation for Medical Education and Research, the Liston Award, the GHR Foundation, and the Schuler Foundation. Dr. Vassilaki disclosed relationships with F. Hoffmann-La Roche, Abbott Laboratories, Johnson & Johnson, Medtronic, Merck, and Amgen. Dr. Howe has no relevant disclosures.
, a cross sectional study has found.
Reporting in the journal Neurology, researchers from the Mayo Clinic in Rochester, Minn., and the University of Chicago found that only a small percentage of patients in the Mayo Clinic Study of Aging (MCSA) with mild cognitive impairment (MCI) or mild dementia due to Alzheimer’s disease would meet the clinical trial eligibility requirements of either agent.
“Our study results show only a small percentage of people with early Alzheimer’s disease may be eligible to receive treatment, mostly due to chronic health conditions and brain scan abnormalities common in older adults,” said lead researcher Maria Vassilaki, MD, PhD, an epidemiologist at Mayo Clinic in Rochester, Minn.
Applying clinical trial exclusion criteria to a broader population
The study included 237 people aged 50-90, 222 who had MCI and 15 with mild dementia, and whose brain scans showed increased amounts of amyloid-beta plaques. Average age of the participants was 80.9 years and 97.5% were White (99.6% not Hispanic or Latino).
The researchers then looked at the eligibility criteria for the pivotal clinical trials for lecanemab, which the U.S. Food and Drug Administration approved in January this year, and aducanumab, which the FDA cleared in 2021. Both drugs received FDA accelerated approval.
For lecanemab, clinical trial inclusion required specific scores for the Clinical Dementia Rating (CDR) (other than 0.5 or 1.0), Wechsler Memory Scale (WMS-R) Logical Memory II (which varied with age group), or Mini-Mental State Examination (MMSE) (22 to 30). A body mass index between 17 and 35 kg/m2 was also an inclusion criteria. Only 112 people, or 47%, met the inclusion criteria. Exclusion criteria included a history of cardiovascular disease or cancer, Parkinson’s disease, or brain injury, or a positive brain scan. When the exclusion criteria were applied, only 19 people, or 8%, qualified for the lecanemab trial.
When the researchers modified the exclusion criteria to include all study participants with MCI but not applying results from additional cognitive tests, 17.4% of MCSA patients would have been eligible for the lecanemab trial.
Aducanumab clinical trial inclusion criteria were a CDR global score other than 0.5 and an MMSE below 24, with an age cutoff of 85 years. Only 104 of the MCSA population, or 44%, met the clinical trial criteria. When the researchers applied the exclusion criteria for cardiovascular disease, central nervous system-related exclusions (such as brain cancer or epilepsy), a history of cancer, or brain scan abnormalities, they found that only 12 people, or 5%, would have been eligible for an aducanumab trial.
“Clinical trials often have strict eligibility criteria and could exclude those with other conditions that could be common in older adults,” Dr. Vassilaki said in emailed comments. “Thus, we wanted to examine if we apply these criteria to a study that recruits participants from the community, how many of the individuals in the early symptomatic stages, mild cognitive impairment or mild dementia due to Alzheimer’s disease, would be eligible for the treatment.”
Dr. Vassilaki said these drugs need to be studied in larger, more diverse populations, as well as in less healthy populations, before they’re more widely available to people with Alzheimer’s disease. “In addition,” she said, “we can learn more from the postmarketing surveillance of side effects and also from registries of patients receiving these treatments.”
One limitation of the study Dr. Vassilaki pointed out is the overwhelmingly White population. Evaluating the clinical trial eligibility criteria in more diverse populations is crucial, she said.
Estimating the number of patients who would qualify for treatment
In an accompanying commentary, Matthew Howes, MD, of Butler Hospital and Brown University in Providence, R.I., and colleagues wrote that the study findings provide health systems planning to offer amyloid-lowering antibodies for Alzheimer’s disease an estimate of how many patients would be eligible for the treatments. “Providers must exercise clinical judgment in selecting patients for treatment with shared decision-making with patients and families,” the commentators wrote.
The study was supported by the National Institutes of Health, the National Institute on Aging, the Alexander Family Alzheimer’s Disease Research Professorship of the Mayo Clinic, the Mayo Foundation for Medical Education and Research, the Liston Award, the GHR Foundation, and the Schuler Foundation. Dr. Vassilaki disclosed relationships with F. Hoffmann-La Roche, Abbott Laboratories, Johnson & Johnson, Medtronic, Merck, and Amgen. Dr. Howe has no relevant disclosures.
FROM NEUROLOGY
Playing football linked to higher Parkinson’s risk
In a cross-sectional study of older men, former tackle football players had a 61% higher likelihood of reporting a diagnosis of parkinsonism or PD, compared with men who played non-football sports.
Longer duration of football participation and higher level of play (college and professional) were associated with higher risk.
Lead researcher Michael L. Alosco, PhD, director of the Boston University Alzheimer’s Disease Research Center, said it’s important to note that the findings are from a cohort of men “enriched” for having PD.
“These are people who are likely already concerned for or at risk for having this disease. We don’t yet know how our findings translate to the general population,” Dr. Alosco said in an interview.
The study was published online in JAMA Network Open.
Repetitive head impacts
Dating back to the 1920s, PD and parkinsonism an umbrella term that refers to motor symptoms associated with PD and other conditions have long been described in boxers who suffer repetitive head impacts.
Multiple studies have linked tackle football with progressive brain diseases such as chronic traumatic encephalopathy. Few studies, however, have investigated the association between participation in football and PD.
For their study, Dr. Alosco and colleagues leveraged data from Fox Insight, a longitudinal online study of some people with and some without PD that is sponsored by the Michael J. Fox Foundation for Parkinson’s Research.
They focused their analyses on 1,875 men (mean age, 67 years) who reported playing any organized sport. As noted, the cohort was enriched for parkinsonism or PD. A total of 1,602 (85%) had received a diagnosis of parkinsonism/PD, and 273 had not.
Altogether, 729 men had a history of playing tackle football, and 1,146 men played non-football sports (control group). Among the football players, 82% played at youth sports or at the high school level; 17% played at the college level; and fewer than 1% played at the pro or semi-pro level.
Among the football players, 648 (89%) reported a parkinsonism/PD diagnosis.
A history of playing football was associated with higher odds of reporting a parkinsonism/PD diagnosis (odds ratio, 1.61; 95% confidence interval, 1.19-2.17) after accounting for age, education level, history of diabetes and heart disease, body mass index (BMI), traumatic brain injury with loss of consciousness, and family history of PD.
Football players who had longer careers and who played at higher levels of competition were at increased risk of having parkinsonism or PD.
Playing one to four seasons yielded an OR of 1.39 (95% CI, 0.98-1.98). The OR was 2.18 (95% CI, 1.36-3.49) for playing five or more seasons.
Football players who competed at the college or professional level had nearly triple the odds of reporting a parkinsonism/PD diagnosis (OR, 2.93; 95% CI, 1.28-6.73), compared with athletes who played at the youth or high school level.
Age at first exposure to football was not associated with a parkinsonism/PD diagnosis.
The researchers cautioned that this was a convenience sample of mostly White people, and the sample was enriched for having PD – factors that limit the generalizability of the findings.
Also, diagnosis of PD was self-reported by participants through online assessments, and objective in-person evaluations were not conducted.
Unequivocal link?
“This is among the first and largest to look at the relationship between football and having a diagnosis of PD in a large cohort of people from the Fox Insight online study,” Dr. Alosco said.
He cautioned that “not all people who play football will develop later-life neurological problems. That being said, the study adds to the accumulating evidence that suggests playing football is one risk factor for the development of later-life brain diseases.
“This represents an opportunity to educate the communities on the potential risks of playing football (short and long term), including what we know and what we don’t know, so that people can make informed decisions on participating in tackle football and develop additional ways to mitigate risk,” Dr. Alosco said.
In a comment, Shaheen Lakhan, MD, PhD, a neurologist and researcher from Boston, said: “The emerging body of research leaves little doubt that engaging in football raises the risk of developing Parkinson’s disease and parkinsonism.
“This progressive line of investigation serves to enhance our understanding, unequivocally demonstrating that even participation in amateur football, including at the youth and high school levels, constitutes a significant risk factor for the onset of Parkinson’s disease,” said Dr. Lakhan, who was not involved in the study.
However, he said it’s “crucial to underscore that the statistics reveal a notable distinction: individuals who have a history of college or professional football play face odds nearly three times higher of receiving a diagnosis of parkinsonism or Parkinson’s disease when compared to their counterparts who engaged in football during their youth or high-school years.
“Ultimately, determinations regarding involvement in sports should be a collaborative endeavor involving parents, young athletes, and health care providers. It is incumbent upon physicians to equip parents and youth with a comprehensive comprehension of the potential risks and rewards inherent in football participation,” Dr. Lakhan said.
He added, though, that there are multifaceted advantages to playing football. “This pursuit nurtures cardiovascular well-being, fosters invaluable social interactions, cultivates teamwork, instills discipline through regimented routines, and hones a spectrum of physical proficiencies,” Dr. Lakhan said.
“It’s worth noting that a constellation of alternative sports, including track and field, swimming, soccer, baseball, and tennis, can be cogently discussed as substitutes, all while preserving the manifold benefits of athletic engagement,” Dr. Lakhan added.
The Fox Insight Study is funded by the Michael J. Fox Foundation for Parkinson’s Research. The study was conducted in collaboration with the Michael J. Fox Foundation for Parkinson’s Research, the sponsor of the Fox Insight study, which collected and aggregated data used in the study. It was also supported by the National Institute of Neurological Disorders and Stroke. Dr. Alosco received grants from the National Institutes of Health during the conduct of the study, an honorarium from the Michael J. Fox Foundation for work unrelated to the study, and royalties from Oxford University Press outside the submitted work. Dr. Lakhan disclosed no relevant financial relationships.
A version of this article first appeared on Medscape.com.
In a cross-sectional study of older men, former tackle football players had a 61% higher likelihood of reporting a diagnosis of parkinsonism or PD, compared with men who played non-football sports.
Longer duration of football participation and higher level of play (college and professional) were associated with higher risk.
Lead researcher Michael L. Alosco, PhD, director of the Boston University Alzheimer’s Disease Research Center, said it’s important to note that the findings are from a cohort of men “enriched” for having PD.
“These are people who are likely already concerned for or at risk for having this disease. We don’t yet know how our findings translate to the general population,” Dr. Alosco said in an interview.
The study was published online in JAMA Network Open.
Repetitive head impacts
Dating back to the 1920s, PD and parkinsonism an umbrella term that refers to motor symptoms associated with PD and other conditions have long been described in boxers who suffer repetitive head impacts.
Multiple studies have linked tackle football with progressive brain diseases such as chronic traumatic encephalopathy. Few studies, however, have investigated the association between participation in football and PD.
For their study, Dr. Alosco and colleagues leveraged data from Fox Insight, a longitudinal online study of some people with and some without PD that is sponsored by the Michael J. Fox Foundation for Parkinson’s Research.
They focused their analyses on 1,875 men (mean age, 67 years) who reported playing any organized sport. As noted, the cohort was enriched for parkinsonism or PD. A total of 1,602 (85%) had received a diagnosis of parkinsonism/PD, and 273 had not.
Altogether, 729 men had a history of playing tackle football, and 1,146 men played non-football sports (control group). Among the football players, 82% played at youth sports or at the high school level; 17% played at the college level; and fewer than 1% played at the pro or semi-pro level.
Among the football players, 648 (89%) reported a parkinsonism/PD diagnosis.
A history of playing football was associated with higher odds of reporting a parkinsonism/PD diagnosis (odds ratio, 1.61; 95% confidence interval, 1.19-2.17) after accounting for age, education level, history of diabetes and heart disease, body mass index (BMI), traumatic brain injury with loss of consciousness, and family history of PD.
Football players who had longer careers and who played at higher levels of competition were at increased risk of having parkinsonism or PD.
Playing one to four seasons yielded an OR of 1.39 (95% CI, 0.98-1.98). The OR was 2.18 (95% CI, 1.36-3.49) for playing five or more seasons.
Football players who competed at the college or professional level had nearly triple the odds of reporting a parkinsonism/PD diagnosis (OR, 2.93; 95% CI, 1.28-6.73), compared with athletes who played at the youth or high school level.
Age at first exposure to football was not associated with a parkinsonism/PD diagnosis.
The researchers cautioned that this was a convenience sample of mostly White people, and the sample was enriched for having PD – factors that limit the generalizability of the findings.
Also, diagnosis of PD was self-reported by participants through online assessments, and objective in-person evaluations were not conducted.
Unequivocal link?
“This is among the first and largest to look at the relationship between football and having a diagnosis of PD in a large cohort of people from the Fox Insight online study,” Dr. Alosco said.
He cautioned that “not all people who play football will develop later-life neurological problems. That being said, the study adds to the accumulating evidence that suggests playing football is one risk factor for the development of later-life brain diseases.
“This represents an opportunity to educate the communities on the potential risks of playing football (short and long term), including what we know and what we don’t know, so that people can make informed decisions on participating in tackle football and develop additional ways to mitigate risk,” Dr. Alosco said.
In a comment, Shaheen Lakhan, MD, PhD, a neurologist and researcher from Boston, said: “The emerging body of research leaves little doubt that engaging in football raises the risk of developing Parkinson’s disease and parkinsonism.
“This progressive line of investigation serves to enhance our understanding, unequivocally demonstrating that even participation in amateur football, including at the youth and high school levels, constitutes a significant risk factor for the onset of Parkinson’s disease,” said Dr. Lakhan, who was not involved in the study.
However, he said it’s “crucial to underscore that the statistics reveal a notable distinction: individuals who have a history of college or professional football play face odds nearly three times higher of receiving a diagnosis of parkinsonism or Parkinson’s disease when compared to their counterparts who engaged in football during their youth or high-school years.
“Ultimately, determinations regarding involvement in sports should be a collaborative endeavor involving parents, young athletes, and health care providers. It is incumbent upon physicians to equip parents and youth with a comprehensive comprehension of the potential risks and rewards inherent in football participation,” Dr. Lakhan said.
He added, though, that there are multifaceted advantages to playing football. “This pursuit nurtures cardiovascular well-being, fosters invaluable social interactions, cultivates teamwork, instills discipline through regimented routines, and hones a spectrum of physical proficiencies,” Dr. Lakhan said.
“It’s worth noting that a constellation of alternative sports, including track and field, swimming, soccer, baseball, and tennis, can be cogently discussed as substitutes, all while preserving the manifold benefits of athletic engagement,” Dr. Lakhan added.
The Fox Insight Study is funded by the Michael J. Fox Foundation for Parkinson’s Research. The study was conducted in collaboration with the Michael J. Fox Foundation for Parkinson’s Research, the sponsor of the Fox Insight study, which collected and aggregated data used in the study. It was also supported by the National Institute of Neurological Disorders and Stroke. Dr. Alosco received grants from the National Institutes of Health during the conduct of the study, an honorarium from the Michael J. Fox Foundation for work unrelated to the study, and royalties from Oxford University Press outside the submitted work. Dr. Lakhan disclosed no relevant financial relationships.
A version of this article first appeared on Medscape.com.
In a cross-sectional study of older men, former tackle football players had a 61% higher likelihood of reporting a diagnosis of parkinsonism or PD, compared with men who played non-football sports.
Longer duration of football participation and higher level of play (college and professional) were associated with higher risk.
Lead researcher Michael L. Alosco, PhD, director of the Boston University Alzheimer’s Disease Research Center, said it’s important to note that the findings are from a cohort of men “enriched” for having PD.
“These are people who are likely already concerned for or at risk for having this disease. We don’t yet know how our findings translate to the general population,” Dr. Alosco said in an interview.
The study was published online in JAMA Network Open.
Repetitive head impacts
Dating back to the 1920s, PD and parkinsonism an umbrella term that refers to motor symptoms associated with PD and other conditions have long been described in boxers who suffer repetitive head impacts.
Multiple studies have linked tackle football with progressive brain diseases such as chronic traumatic encephalopathy. Few studies, however, have investigated the association between participation in football and PD.
For their study, Dr. Alosco and colleagues leveraged data from Fox Insight, a longitudinal online study of some people with and some without PD that is sponsored by the Michael J. Fox Foundation for Parkinson’s Research.
They focused their analyses on 1,875 men (mean age, 67 years) who reported playing any organized sport. As noted, the cohort was enriched for parkinsonism or PD. A total of 1,602 (85%) had received a diagnosis of parkinsonism/PD, and 273 had not.
Altogether, 729 men had a history of playing tackle football, and 1,146 men played non-football sports (control group). Among the football players, 82% played at youth sports or at the high school level; 17% played at the college level; and fewer than 1% played at the pro or semi-pro level.
Among the football players, 648 (89%) reported a parkinsonism/PD diagnosis.
A history of playing football was associated with higher odds of reporting a parkinsonism/PD diagnosis (odds ratio, 1.61; 95% confidence interval, 1.19-2.17) after accounting for age, education level, history of diabetes and heart disease, body mass index (BMI), traumatic brain injury with loss of consciousness, and family history of PD.
Football players who had longer careers and who played at higher levels of competition were at increased risk of having parkinsonism or PD.
Playing one to four seasons yielded an OR of 1.39 (95% CI, 0.98-1.98). The OR was 2.18 (95% CI, 1.36-3.49) for playing five or more seasons.
Football players who competed at the college or professional level had nearly triple the odds of reporting a parkinsonism/PD diagnosis (OR, 2.93; 95% CI, 1.28-6.73), compared with athletes who played at the youth or high school level.
Age at first exposure to football was not associated with a parkinsonism/PD diagnosis.
The researchers cautioned that this was a convenience sample of mostly White people, and the sample was enriched for having PD – factors that limit the generalizability of the findings.
Also, diagnosis of PD was self-reported by participants through online assessments, and objective in-person evaluations were not conducted.
Unequivocal link?
“This is among the first and largest to look at the relationship between football and having a diagnosis of PD in a large cohort of people from the Fox Insight online study,” Dr. Alosco said.
He cautioned that “not all people who play football will develop later-life neurological problems. That being said, the study adds to the accumulating evidence that suggests playing football is one risk factor for the development of later-life brain diseases.
“This represents an opportunity to educate the communities on the potential risks of playing football (short and long term), including what we know and what we don’t know, so that people can make informed decisions on participating in tackle football and develop additional ways to mitigate risk,” Dr. Alosco said.
In a comment, Shaheen Lakhan, MD, PhD, a neurologist and researcher from Boston, said: “The emerging body of research leaves little doubt that engaging in football raises the risk of developing Parkinson’s disease and parkinsonism.
“This progressive line of investigation serves to enhance our understanding, unequivocally demonstrating that even participation in amateur football, including at the youth and high school levels, constitutes a significant risk factor for the onset of Parkinson’s disease,” said Dr. Lakhan, who was not involved in the study.
However, he said it’s “crucial to underscore that the statistics reveal a notable distinction: individuals who have a history of college or professional football play face odds nearly three times higher of receiving a diagnosis of parkinsonism or Parkinson’s disease when compared to their counterparts who engaged in football during their youth or high-school years.
“Ultimately, determinations regarding involvement in sports should be a collaborative endeavor involving parents, young athletes, and health care providers. It is incumbent upon physicians to equip parents and youth with a comprehensive comprehension of the potential risks and rewards inherent in football participation,” Dr. Lakhan said.
He added, though, that there are multifaceted advantages to playing football. “This pursuit nurtures cardiovascular well-being, fosters invaluable social interactions, cultivates teamwork, instills discipline through regimented routines, and hones a spectrum of physical proficiencies,” Dr. Lakhan said.
“It’s worth noting that a constellation of alternative sports, including track and field, swimming, soccer, baseball, and tennis, can be cogently discussed as substitutes, all while preserving the manifold benefits of athletic engagement,” Dr. Lakhan added.
The Fox Insight Study is funded by the Michael J. Fox Foundation for Parkinson’s Research. The study was conducted in collaboration with the Michael J. Fox Foundation for Parkinson’s Research, the sponsor of the Fox Insight study, which collected and aggregated data used in the study. It was also supported by the National Institute of Neurological Disorders and Stroke. Dr. Alosco received grants from the National Institutes of Health during the conduct of the study, an honorarium from the Michael J. Fox Foundation for work unrelated to the study, and royalties from Oxford University Press outside the submitted work. Dr. Lakhan disclosed no relevant financial relationships.
A version of this article first appeared on Medscape.com.
FROM JAMA NETWORK OPEN
Brain volume patterns vary across psychiatric disorders
A large brain imaging study of adults with six different psychiatric illnesses shows that heterogeneity in regional gray matter volume deviations is a general feature of psychiatric illness, but that these regionally heterogeneous areas are often embedded within common functional circuits and networks.
study investigator Ashlea Segal said in an email.
The findings also suggest that it’s “unlikely that a single cause or mechanism of a given disorder exists, and that a ‘one-size-fits-all’ approach to treatment is likely only appropriate for a small subset of individuals. In fact, one size doesn’t fit all. It probably doesn’t even fit most,” said Ms. Segal, a PhD candidate with the Turner Institute for Brain and Mental Health’s Neural Systems and Behaviour Lab at Monash University in Melbourne.
“Focusing on brain alterations at an individual level allows us to develop more personally tailored treatments,” Ms. Segal added.
Regional heterogeneity, the authors write, “thus offers a plausible explanation for the well-described clinical heterogeneity observed in psychiatric disorders, while circuit- and network-level aggregation of deviations is a putative neural substrate for phenotypic similarities between patients assigned the same diagnosis.”
The study was published online in Nature Neuroscience
Beyond group averages
For decades, researchers have mapped brain areas showing reduced gray matter volume (GMV) in people diagnosed with a variety of mental illnesses, but these maps have only been generated at the level of group averages, Ms. Segal explained.
“This means that we understand how the brains of people with, say, schizophrenia, differ from those without schizophrenia on average, but we can’t really say much about individual people,” Ms. Segal said.
For their study, the researchers used new statistical techniques developed by Andre Marquand, PhD, who co-led the project, to characterize the heterogeneity of GMV differences in 1,294 individuals diagnosed with one of six psychiatric conditions and 1,465 matched controls. Dr. Marquand is affiliated with the Donders Institute for Brain, Cognition, and Behavior in Nijmegen, the Netherlands.
These techniques “allow us to benchmark the size of over 1,000 different brain regions in any given person relative to what we should expect to see in the general population. In this way, we can identify, for any person, brain regions showing unusually small or large volumes, given that person’s age and sex,” Ms. Segal told this news organization.
The clinical sample included 202 individuals with autism spectrum disorder, 153 with attention-deficit/hyperactivity disorder (ADHD), 228 with bipolar disorder, 161 with major depressive disorder, 167 with obsessive-compulsive disorder, and 383 individuals with schizophrenia.
Confirming earlier findings, those with psychiatric illness showed more GMV deviations than healthy controls, the researchers found.
However, at the individual level, deviations from population expectations for regional gray matter volumes were “highly heterogeneous,” affecting the same area in less than 7% of people with the same diagnosis, they note. “This result means that it is difficult to pinpoint treatment targets or causal mechanisms by focusing on group averages alone,” Alex Fornito, PhD, of Monash University, who led the research team, said in a statement.
“It may also explain why people with the same diagnosis show wide variability in their symptom profiles and treatment outcomes,” Dr. Fornito added.
Yet, despite considerable heterogeneity at the regional level across different diagnoses, these deviations were embedded within common functional circuits and networks in up to 56% of cases.
The salience-ventral attention network, for example, which plays a central role in cognitive control, interoceptive awareness, and switching between internally and externally focused attention, was implicated across diagnoses, with other neural networks selectively involved in depression, bipolar disorder, schizophrenia, and ADHD.
The researchers say the approach they developed opens new opportunities for mapping brain changes in mental illness.
“The framework we have developed allows us to understand the diversity of brain changes in people with mental illness at different levels, from individual regions through to more widespread brain circuits and networks, offering a deeper insight into how the brain is affected in individual people,” Dr. Fornito said in a statement.
The study had no commercial funding. Ms. Segal, Dr. Fornito, and Dr. Marquand report no relevant financial relationships.
A version of this article first appeared on Medscape.com.
A large brain imaging study of adults with six different psychiatric illnesses shows that heterogeneity in regional gray matter volume deviations is a general feature of psychiatric illness, but that these regionally heterogeneous areas are often embedded within common functional circuits and networks.
study investigator Ashlea Segal said in an email.
The findings also suggest that it’s “unlikely that a single cause or mechanism of a given disorder exists, and that a ‘one-size-fits-all’ approach to treatment is likely only appropriate for a small subset of individuals. In fact, one size doesn’t fit all. It probably doesn’t even fit most,” said Ms. Segal, a PhD candidate with the Turner Institute for Brain and Mental Health’s Neural Systems and Behaviour Lab at Monash University in Melbourne.
“Focusing on brain alterations at an individual level allows us to develop more personally tailored treatments,” Ms. Segal added.
Regional heterogeneity, the authors write, “thus offers a plausible explanation for the well-described clinical heterogeneity observed in psychiatric disorders, while circuit- and network-level aggregation of deviations is a putative neural substrate for phenotypic similarities between patients assigned the same diagnosis.”
The study was published online in Nature Neuroscience
Beyond group averages
For decades, researchers have mapped brain areas showing reduced gray matter volume (GMV) in people diagnosed with a variety of mental illnesses, but these maps have only been generated at the level of group averages, Ms. Segal explained.
“This means that we understand how the brains of people with, say, schizophrenia, differ from those without schizophrenia on average, but we can’t really say much about individual people,” Ms. Segal said.
For their study, the researchers used new statistical techniques developed by Andre Marquand, PhD, who co-led the project, to characterize the heterogeneity of GMV differences in 1,294 individuals diagnosed with one of six psychiatric conditions and 1,465 matched controls. Dr. Marquand is affiliated with the Donders Institute for Brain, Cognition, and Behavior in Nijmegen, the Netherlands.
These techniques “allow us to benchmark the size of over 1,000 different brain regions in any given person relative to what we should expect to see in the general population. In this way, we can identify, for any person, brain regions showing unusually small or large volumes, given that person’s age and sex,” Ms. Segal told this news organization.
The clinical sample included 202 individuals with autism spectrum disorder, 153 with attention-deficit/hyperactivity disorder (ADHD), 228 with bipolar disorder, 161 with major depressive disorder, 167 with obsessive-compulsive disorder, and 383 individuals with schizophrenia.
Confirming earlier findings, those with psychiatric illness showed more GMV deviations than healthy controls, the researchers found.
However, at the individual level, deviations from population expectations for regional gray matter volumes were “highly heterogeneous,” affecting the same area in less than 7% of people with the same diagnosis, they note. “This result means that it is difficult to pinpoint treatment targets or causal mechanisms by focusing on group averages alone,” Alex Fornito, PhD, of Monash University, who led the research team, said in a statement.
“It may also explain why people with the same diagnosis show wide variability in their symptom profiles and treatment outcomes,” Dr. Fornito added.
Yet, despite considerable heterogeneity at the regional level across different diagnoses, these deviations were embedded within common functional circuits and networks in up to 56% of cases.
The salience-ventral attention network, for example, which plays a central role in cognitive control, interoceptive awareness, and switching between internally and externally focused attention, was implicated across diagnoses, with other neural networks selectively involved in depression, bipolar disorder, schizophrenia, and ADHD.
The researchers say the approach they developed opens new opportunities for mapping brain changes in mental illness.
“The framework we have developed allows us to understand the diversity of brain changes in people with mental illness at different levels, from individual regions through to more widespread brain circuits and networks, offering a deeper insight into how the brain is affected in individual people,” Dr. Fornito said in a statement.
The study had no commercial funding. Ms. Segal, Dr. Fornito, and Dr. Marquand report no relevant financial relationships.
A version of this article first appeared on Medscape.com.
A large brain imaging study of adults with six different psychiatric illnesses shows that heterogeneity in regional gray matter volume deviations is a general feature of psychiatric illness, but that these regionally heterogeneous areas are often embedded within common functional circuits and networks.
study investigator Ashlea Segal said in an email.
The findings also suggest that it’s “unlikely that a single cause or mechanism of a given disorder exists, and that a ‘one-size-fits-all’ approach to treatment is likely only appropriate for a small subset of individuals. In fact, one size doesn’t fit all. It probably doesn’t even fit most,” said Ms. Segal, a PhD candidate with the Turner Institute for Brain and Mental Health’s Neural Systems and Behaviour Lab at Monash University in Melbourne.
“Focusing on brain alterations at an individual level allows us to develop more personally tailored treatments,” Ms. Segal added.
Regional heterogeneity, the authors write, “thus offers a plausible explanation for the well-described clinical heterogeneity observed in psychiatric disorders, while circuit- and network-level aggregation of deviations is a putative neural substrate for phenotypic similarities between patients assigned the same diagnosis.”
The study was published online in Nature Neuroscience
Beyond group averages
For decades, researchers have mapped brain areas showing reduced gray matter volume (GMV) in people diagnosed with a variety of mental illnesses, but these maps have only been generated at the level of group averages, Ms. Segal explained.
“This means that we understand how the brains of people with, say, schizophrenia, differ from those without schizophrenia on average, but we can’t really say much about individual people,” Ms. Segal said.
For their study, the researchers used new statistical techniques developed by Andre Marquand, PhD, who co-led the project, to characterize the heterogeneity of GMV differences in 1,294 individuals diagnosed with one of six psychiatric conditions and 1,465 matched controls. Dr. Marquand is affiliated with the Donders Institute for Brain, Cognition, and Behavior in Nijmegen, the Netherlands.
These techniques “allow us to benchmark the size of over 1,000 different brain regions in any given person relative to what we should expect to see in the general population. In this way, we can identify, for any person, brain regions showing unusually small or large volumes, given that person’s age and sex,” Ms. Segal told this news organization.
The clinical sample included 202 individuals with autism spectrum disorder, 153 with attention-deficit/hyperactivity disorder (ADHD), 228 with bipolar disorder, 161 with major depressive disorder, 167 with obsessive-compulsive disorder, and 383 individuals with schizophrenia.
Confirming earlier findings, those with psychiatric illness showed more GMV deviations than healthy controls, the researchers found.
However, at the individual level, deviations from population expectations for regional gray matter volumes were “highly heterogeneous,” affecting the same area in less than 7% of people with the same diagnosis, they note. “This result means that it is difficult to pinpoint treatment targets or causal mechanisms by focusing on group averages alone,” Alex Fornito, PhD, of Monash University, who led the research team, said in a statement.
“It may also explain why people with the same diagnosis show wide variability in their symptom profiles and treatment outcomes,” Dr. Fornito added.
Yet, despite considerable heterogeneity at the regional level across different diagnoses, these deviations were embedded within common functional circuits and networks in up to 56% of cases.
The salience-ventral attention network, for example, which plays a central role in cognitive control, interoceptive awareness, and switching between internally and externally focused attention, was implicated across diagnoses, with other neural networks selectively involved in depression, bipolar disorder, schizophrenia, and ADHD.
The researchers say the approach they developed opens new opportunities for mapping brain changes in mental illness.
“The framework we have developed allows us to understand the diversity of brain changes in people with mental illness at different levels, from individual regions through to more widespread brain circuits and networks, offering a deeper insight into how the brain is affected in individual people,” Dr. Fornito said in a statement.
The study had no commercial funding. Ms. Segal, Dr. Fornito, and Dr. Marquand report no relevant financial relationships.
A version of this article first appeared on Medscape.com.
FROM NATURE NEUROSCIENCE
Which factors distinguish superagers from the rest of us?
Even at an advanced age, superagers have the memory of someone 20 or 30 years their junior. But why is that? A new study shows that, in superagers, However, the study also emphasizes the importance of physical and mental fitness for a healthy aging process.
“One of the most important unanswered questions with regard to superagers is: ‘Are they resistant to age-related memory loss, or do they have coping mechanisms that allow them to better offset this memory loss?’ ” wrote Marta Garo-Pascual, a PhD candidate at the Autonomous University of Madrid, Spain, and colleagues in the Lancet Healthy Longevity. “Our results indicate that superagers are resistant to these processes.”
Six years’ monitoring
From a cohort of older adults who had participated in a study aiming to identify early indicators of Alzheimer’s disease, the research group chose 64 superagers and 55 normal senior citizens. The latter served as the control group. While the superagers performed just as well in a memory test as people 30 years their junior, the control group’s performance was in line with their age and level of education.
All study participants were over age 79 years. Both the group of superagers and the control group included more females than males. On average, they were monitored for 6 years. During this period, a checkup was scheduled annually with an MRI examination, clinical tests, blood tests, and documentation of lifestyle factors.
For Alessandro Cellerino, PhD, of the Leibniz Institute on Aging–Fritz Lipmann Institute in Jena, Germany, this is the most crucial aspect of the study. “Even before this study, we knew that superagers demonstrated less atrophy in certain areas of the brain, but this was always only ever based on a single measurement.”
Memory centers protected
The MRI examinations confirmed that in superagers, gray matter atrophy in the regions responsible for memory (such as the medial temporal lobe and cholinergic forebrain), as well in regions important for movement (such as the motor thalamus), was less pronounced. In addition, the volume of gray matter in these regions, especially in the medial temporal lobe, decreased much more slowly in the superagers than in the control subjects over the study period.
Ms. Garo-Pascual and associates used a machine-learning algorithm to differentiate between superagers and normal older adults. From the 89 demographic, lifestyle, and clinical factors entered into the algorithm, two were the most important for the classification: the ability to move and mental health.
Mobility and mental health
Clinical tests such as the Timed Up-and-Go Test and the Finger Tapping Test revealed that superagers can be distinguished from the normally aging control subjects with regard to their mobility and fine motor skills. Their physical condition was better, although they, by their own admission, did not move any more than the control subjects in day-to-day life. According to Dr. Cellerino, this finding confirms that physical activity is paramount for cognitive function. “These people were over 80 years old – the fact that there was not much difference between their levels of activity is not surprising. Much more relevant is the question of how you get there – i.e., how active you are at the ages of 40, 50 or even 60 years old.”
Remaining active is important
As a matter of fact, the superagers indicated that generally they had been more active than the control subjects during their middle years. “Attempting to stay physically fit is essential; even if it just means going for a walk or taking the stairs,” said Dr. Cellerino.
On average, the superagers also fared much better in tests on physical health than the control subjects. They suffered significantly less from depression or anxiety disorders. “Earlier studies suggest that depression and anxiety disorders may influence performance in memory tests across all ages and that they are risk factors for developing dementia,” said Dr. Cellerino.
To avoid mental health issues in later life, gerontologist Dr. Cellerino recommended remaining socially engaged and involved. “Depression and anxiety are commonly also a consequence of social isolation,” he said.
Potential genetic differences
Blood sample analyses demonstrated that the superagers exhibited lower concentrations of biomarkers for neurodegenerative diseases than the control group did. In contrast, there was no difference between the two groups in the prevalence of the apo e4 allele, one of the most important genetic risk factors for Alzheimer’s disease. Nevertheless, Ms. Garo-Pascual and associates assume that genetics also play a role. They found that, despite 89 variables employed, the algorithm used could only distinguish superagers from normal older adults 66% of the time. This suggests that additional factors must be in play, such as genetic differences.
Body and mind
Since this is an observational study, whether the determined factors have a direct effect on superaging cannot be ascertained, the authors wrote. However, the results are consistent with earlier findings.
“Regarding the management of old age, we actually haven’t learned anything more than what we already knew. But it does confirm that physical and mental function are closely entwined and that we must maintain both to age healthily,” Dr. Cellerino concluded.
This article was translated from the Medscape German Edition. A version appeared on Medscape.com.
Even at an advanced age, superagers have the memory of someone 20 or 30 years their junior. But why is that? A new study shows that, in superagers, However, the study also emphasizes the importance of physical and mental fitness for a healthy aging process.
“One of the most important unanswered questions with regard to superagers is: ‘Are they resistant to age-related memory loss, or do they have coping mechanisms that allow them to better offset this memory loss?’ ” wrote Marta Garo-Pascual, a PhD candidate at the Autonomous University of Madrid, Spain, and colleagues in the Lancet Healthy Longevity. “Our results indicate that superagers are resistant to these processes.”
Six years’ monitoring
From a cohort of older adults who had participated in a study aiming to identify early indicators of Alzheimer’s disease, the research group chose 64 superagers and 55 normal senior citizens. The latter served as the control group. While the superagers performed just as well in a memory test as people 30 years their junior, the control group’s performance was in line with their age and level of education.
All study participants were over age 79 years. Both the group of superagers and the control group included more females than males. On average, they were monitored for 6 years. During this period, a checkup was scheduled annually with an MRI examination, clinical tests, blood tests, and documentation of lifestyle factors.
For Alessandro Cellerino, PhD, of the Leibniz Institute on Aging–Fritz Lipmann Institute in Jena, Germany, this is the most crucial aspect of the study. “Even before this study, we knew that superagers demonstrated less atrophy in certain areas of the brain, but this was always only ever based on a single measurement.”
Memory centers protected
The MRI examinations confirmed that in superagers, gray matter atrophy in the regions responsible for memory (such as the medial temporal lobe and cholinergic forebrain), as well in regions important for movement (such as the motor thalamus), was less pronounced. In addition, the volume of gray matter in these regions, especially in the medial temporal lobe, decreased much more slowly in the superagers than in the control subjects over the study period.
Ms. Garo-Pascual and associates used a machine-learning algorithm to differentiate between superagers and normal older adults. From the 89 demographic, lifestyle, and clinical factors entered into the algorithm, two were the most important for the classification: the ability to move and mental health.
Mobility and mental health
Clinical tests such as the Timed Up-and-Go Test and the Finger Tapping Test revealed that superagers can be distinguished from the normally aging control subjects with regard to their mobility and fine motor skills. Their physical condition was better, although they, by their own admission, did not move any more than the control subjects in day-to-day life. According to Dr. Cellerino, this finding confirms that physical activity is paramount for cognitive function. “These people were over 80 years old – the fact that there was not much difference between their levels of activity is not surprising. Much more relevant is the question of how you get there – i.e., how active you are at the ages of 40, 50 or even 60 years old.”
Remaining active is important
As a matter of fact, the superagers indicated that generally they had been more active than the control subjects during their middle years. “Attempting to stay physically fit is essential; even if it just means going for a walk or taking the stairs,” said Dr. Cellerino.
On average, the superagers also fared much better in tests on physical health than the control subjects. They suffered significantly less from depression or anxiety disorders. “Earlier studies suggest that depression and anxiety disorders may influence performance in memory tests across all ages and that they are risk factors for developing dementia,” said Dr. Cellerino.
To avoid mental health issues in later life, gerontologist Dr. Cellerino recommended remaining socially engaged and involved. “Depression and anxiety are commonly also a consequence of social isolation,” he said.
Potential genetic differences
Blood sample analyses demonstrated that the superagers exhibited lower concentrations of biomarkers for neurodegenerative diseases than the control group did. In contrast, there was no difference between the two groups in the prevalence of the apo e4 allele, one of the most important genetic risk factors for Alzheimer’s disease. Nevertheless, Ms. Garo-Pascual and associates assume that genetics also play a role. They found that, despite 89 variables employed, the algorithm used could only distinguish superagers from normal older adults 66% of the time. This suggests that additional factors must be in play, such as genetic differences.
Body and mind
Since this is an observational study, whether the determined factors have a direct effect on superaging cannot be ascertained, the authors wrote. However, the results are consistent with earlier findings.
“Regarding the management of old age, we actually haven’t learned anything more than what we already knew. But it does confirm that physical and mental function are closely entwined and that we must maintain both to age healthily,” Dr. Cellerino concluded.
This article was translated from the Medscape German Edition. A version appeared on Medscape.com.
Even at an advanced age, superagers have the memory of someone 20 or 30 years their junior. But why is that? A new study shows that, in superagers, However, the study also emphasizes the importance of physical and mental fitness for a healthy aging process.
“One of the most important unanswered questions with regard to superagers is: ‘Are they resistant to age-related memory loss, or do they have coping mechanisms that allow them to better offset this memory loss?’ ” wrote Marta Garo-Pascual, a PhD candidate at the Autonomous University of Madrid, Spain, and colleagues in the Lancet Healthy Longevity. “Our results indicate that superagers are resistant to these processes.”
Six years’ monitoring
From a cohort of older adults who had participated in a study aiming to identify early indicators of Alzheimer’s disease, the research group chose 64 superagers and 55 normal senior citizens. The latter served as the control group. While the superagers performed just as well in a memory test as people 30 years their junior, the control group’s performance was in line with their age and level of education.
All study participants were over age 79 years. Both the group of superagers and the control group included more females than males. On average, they were monitored for 6 years. During this period, a checkup was scheduled annually with an MRI examination, clinical tests, blood tests, and documentation of lifestyle factors.
For Alessandro Cellerino, PhD, of the Leibniz Institute on Aging–Fritz Lipmann Institute in Jena, Germany, this is the most crucial aspect of the study. “Even before this study, we knew that superagers demonstrated less atrophy in certain areas of the brain, but this was always only ever based on a single measurement.”
Memory centers protected
The MRI examinations confirmed that in superagers, gray matter atrophy in the regions responsible for memory (such as the medial temporal lobe and cholinergic forebrain), as well in regions important for movement (such as the motor thalamus), was less pronounced. In addition, the volume of gray matter in these regions, especially in the medial temporal lobe, decreased much more slowly in the superagers than in the control subjects over the study period.
Ms. Garo-Pascual and associates used a machine-learning algorithm to differentiate between superagers and normal older adults. From the 89 demographic, lifestyle, and clinical factors entered into the algorithm, two were the most important for the classification: the ability to move and mental health.
Mobility and mental health
Clinical tests such as the Timed Up-and-Go Test and the Finger Tapping Test revealed that superagers can be distinguished from the normally aging control subjects with regard to their mobility and fine motor skills. Their physical condition was better, although they, by their own admission, did not move any more than the control subjects in day-to-day life. According to Dr. Cellerino, this finding confirms that physical activity is paramount for cognitive function. “These people were over 80 years old – the fact that there was not much difference between their levels of activity is not surprising. Much more relevant is the question of how you get there – i.e., how active you are at the ages of 40, 50 or even 60 years old.”
Remaining active is important
As a matter of fact, the superagers indicated that generally they had been more active than the control subjects during their middle years. “Attempting to stay physically fit is essential; even if it just means going for a walk or taking the stairs,” said Dr. Cellerino.
On average, the superagers also fared much better in tests on physical health than the control subjects. They suffered significantly less from depression or anxiety disorders. “Earlier studies suggest that depression and anxiety disorders may influence performance in memory tests across all ages and that they are risk factors for developing dementia,” said Dr. Cellerino.
To avoid mental health issues in later life, gerontologist Dr. Cellerino recommended remaining socially engaged and involved. “Depression and anxiety are commonly also a consequence of social isolation,” he said.
Potential genetic differences
Blood sample analyses demonstrated that the superagers exhibited lower concentrations of biomarkers for neurodegenerative diseases than the control group did. In contrast, there was no difference between the two groups in the prevalence of the apo e4 allele, one of the most important genetic risk factors for Alzheimer’s disease. Nevertheless, Ms. Garo-Pascual and associates assume that genetics also play a role. They found that, despite 89 variables employed, the algorithm used could only distinguish superagers from normal older adults 66% of the time. This suggests that additional factors must be in play, such as genetic differences.
Body and mind
Since this is an observational study, whether the determined factors have a direct effect on superaging cannot be ascertained, the authors wrote. However, the results are consistent with earlier findings.
“Regarding the management of old age, we actually haven’t learned anything more than what we already knew. But it does confirm that physical and mental function are closely entwined and that we must maintain both to age healthily,” Dr. Cellerino concluded.
This article was translated from the Medscape German Edition. A version appeared on Medscape.com.
FROM THE LANCET HEALTHY LONGEVITY
Cause of common gastrointestinal symptoms in diabetes?
The condition – in which the pancreas fails to produce sufficient enzymes to fully digest food – can cause gastrointestinal symptoms, including steatorrhea or other stool changes, bloating, and/or abdominal pain. The preferred test for diagnosis is a 72-hour fecal fat quantification test, but fecal elastase-1 is a less invasive and reliable alternative; values of less than 200 mcg/g indicate EPI. Treatment is pancreatic enzyme replacement therapy (PERT), taken with every meal.
EPI occurs in up to 90% of people with cystic fibrosis and chronic pancreatitis and is commonly associated with acute pancreatitis, autoimmune pancreatitis, and pancreatic cancer. However, those conditions are relatively rare compared to diabetes, yet the EPI association with diabetes is less well-studied, Dana M. Lewis, BA, points out in her review article.
While the data vary across studies, owing to differences in inclusion and exclusion criteria, the overall median prevalence of EPI was 33% among patients with type 1 diabetes (range, 14%-77.5%) and 29% among patients with type 2 diabetes (range, 16.8%-49.2%), Ms. Lewis reports in the article, which was published in Diabetes Technology and Therapeutics.
“Cumulatively, this suggests there may be significant numbers of people with diabetes with EPI who are undiagnosed. People with diabetes who present with gastrointestinal symptoms – such as steatorrhea or changes in stool, bloating, and/or abdominal pain – should be screened for EPI. Diabetes specialists, gastroenterologists, and primary care providers should be aware of the high rates of prevalence of diabetes and EPI and recommend fecal elastase-1 screening for people with diabetes and GI symptoms,” Ms. Lewis writes.
Since the publication of her article, Ms. Lewis told this news organization, “I’ve gotten feedback from multiple diabetes and general providers that they will be changing their practice as a result of this paper, by screening people with diabetes who have GI symptoms for EPI, which is wonderful to hear.”
In addition, she noted that since she began blogging about EPI and diabetes last year following her own delayed diagnosis, “I have had at least half a dozen people with diabetes tell me that they’ve since sought screening for EPI after years of GI symptoms and ended up being diagnosed with EPI as well.”
Asked to comment, Romesh Khardori, MD, PhD, said in an interview, “it would be prudent to investigate EPI and treat it when confirmed. Consultation with a gastroenterologist colleague may be helpful. Treatment is quite rewarding.”
Data limitations; and don’t forget celiac disease and gastroparesis
However, as does Ms. Lewis, Dr. Khardori points to the limitations of the current literature.
“This review suffers from the lack of uniformity amongst the studies in terms of diagnosis and documentation of exocrine pancreatic insufficiency. Many studies lack a control group to draw any meaningful conclusions. Correlations with duration of diabetes, age of onset, symptoms, and glycemic control were mostly lacking,” says Dr. Khardori, now retired but formerly professor of medicine: endocrinology and metabolism at Eastern Virginia Medical School, Norfolk.
In general, the data suggest that PERT is safe and effective for people with diabetes and that it may reduce glycemic variability. However, “there are not many studies looking at glucose outcomes in detail, and only one study that has used CGM [continuous glucose monitoring] data, so this is a big area of need for future study,” Ms. Lewis told this news organization.
Ms. Lewis also reviewed the literature on the prevalence of two other diabetes-related gastrointestinal conditions, celiac disease and gastroparesis, “because anecdotally, it seems as though diabetes care providers and people with diabetes are more aware of those as causes of GI symptoms.”
In type 1 diabetes, the prevalence of both celiac disease and gastroparesis are reported at about 5%, in contrast to the 33% for EPI. Similarly, in type 2 diabetes, the reported prevalence of these two conditions are 1.3% and 1.6%, respectively, vs. 29% for EPI.
“This suggests to me that there is likely disproportionate screening for things like celiac [disease] and gastroparesis in diabetes, and that screening for EPI when people with diabetes present with GI symptoms is warranted,” Ms. Lewis said.
However, Dr. Khardori cautioned that those conditions may also be missed, noting, “Celiac disease often is undiagnosed and gastropathy or gastroparesis may be overlooked in a busy primary care clinic where most patients with diabetes mellitus get their care.”
Ms. Lewis and Dr. Khardori have disclosed no relevant financial relationships.
A version of this article first appeared on Medscape.com.
The condition – in which the pancreas fails to produce sufficient enzymes to fully digest food – can cause gastrointestinal symptoms, including steatorrhea or other stool changes, bloating, and/or abdominal pain. The preferred test for diagnosis is a 72-hour fecal fat quantification test, but fecal elastase-1 is a less invasive and reliable alternative; values of less than 200 mcg/g indicate EPI. Treatment is pancreatic enzyme replacement therapy (PERT), taken with every meal.
EPI occurs in up to 90% of people with cystic fibrosis and chronic pancreatitis and is commonly associated with acute pancreatitis, autoimmune pancreatitis, and pancreatic cancer. However, those conditions are relatively rare compared to diabetes, yet the EPI association with diabetes is less well-studied, Dana M. Lewis, BA, points out in her review article.
While the data vary across studies, owing to differences in inclusion and exclusion criteria, the overall median prevalence of EPI was 33% among patients with type 1 diabetes (range, 14%-77.5%) and 29% among patients with type 2 diabetes (range, 16.8%-49.2%), Ms. Lewis reports in the article, which was published in Diabetes Technology and Therapeutics.
“Cumulatively, this suggests there may be significant numbers of people with diabetes with EPI who are undiagnosed. People with diabetes who present with gastrointestinal symptoms – such as steatorrhea or changes in stool, bloating, and/or abdominal pain – should be screened for EPI. Diabetes specialists, gastroenterologists, and primary care providers should be aware of the high rates of prevalence of diabetes and EPI and recommend fecal elastase-1 screening for people with diabetes and GI symptoms,” Ms. Lewis writes.
Since the publication of her article, Ms. Lewis told this news organization, “I’ve gotten feedback from multiple diabetes and general providers that they will be changing their practice as a result of this paper, by screening people with diabetes who have GI symptoms for EPI, which is wonderful to hear.”
In addition, she noted that since she began blogging about EPI and diabetes last year following her own delayed diagnosis, “I have had at least half a dozen people with diabetes tell me that they’ve since sought screening for EPI after years of GI symptoms and ended up being diagnosed with EPI as well.”
Asked to comment, Romesh Khardori, MD, PhD, said in an interview, “it would be prudent to investigate EPI and treat it when confirmed. Consultation with a gastroenterologist colleague may be helpful. Treatment is quite rewarding.”
Data limitations; and don’t forget celiac disease and gastroparesis
However, as does Ms. Lewis, Dr. Khardori points to the limitations of the current literature.
“This review suffers from the lack of uniformity amongst the studies in terms of diagnosis and documentation of exocrine pancreatic insufficiency. Many studies lack a control group to draw any meaningful conclusions. Correlations with duration of diabetes, age of onset, symptoms, and glycemic control were mostly lacking,” says Dr. Khardori, now retired but formerly professor of medicine: endocrinology and metabolism at Eastern Virginia Medical School, Norfolk.
In general, the data suggest that PERT is safe and effective for people with diabetes and that it may reduce glycemic variability. However, “there are not many studies looking at glucose outcomes in detail, and only one study that has used CGM [continuous glucose monitoring] data, so this is a big area of need for future study,” Ms. Lewis told this news organization.
Ms. Lewis also reviewed the literature on the prevalence of two other diabetes-related gastrointestinal conditions, celiac disease and gastroparesis, “because anecdotally, it seems as though diabetes care providers and people with diabetes are more aware of those as causes of GI symptoms.”
In type 1 diabetes, the prevalence of both celiac disease and gastroparesis are reported at about 5%, in contrast to the 33% for EPI. Similarly, in type 2 diabetes, the reported prevalence of these two conditions are 1.3% and 1.6%, respectively, vs. 29% for EPI.
“This suggests to me that there is likely disproportionate screening for things like celiac [disease] and gastroparesis in diabetes, and that screening for EPI when people with diabetes present with GI symptoms is warranted,” Ms. Lewis said.
However, Dr. Khardori cautioned that those conditions may also be missed, noting, “Celiac disease often is undiagnosed and gastropathy or gastroparesis may be overlooked in a busy primary care clinic where most patients with diabetes mellitus get their care.”
Ms. Lewis and Dr. Khardori have disclosed no relevant financial relationships.
A version of this article first appeared on Medscape.com.
The condition – in which the pancreas fails to produce sufficient enzymes to fully digest food – can cause gastrointestinal symptoms, including steatorrhea or other stool changes, bloating, and/or abdominal pain. The preferred test for diagnosis is a 72-hour fecal fat quantification test, but fecal elastase-1 is a less invasive and reliable alternative; values of less than 200 mcg/g indicate EPI. Treatment is pancreatic enzyme replacement therapy (PERT), taken with every meal.
EPI occurs in up to 90% of people with cystic fibrosis and chronic pancreatitis and is commonly associated with acute pancreatitis, autoimmune pancreatitis, and pancreatic cancer. However, those conditions are relatively rare compared to diabetes, yet the EPI association with diabetes is less well-studied, Dana M. Lewis, BA, points out in her review article.
While the data vary across studies, owing to differences in inclusion and exclusion criteria, the overall median prevalence of EPI was 33% among patients with type 1 diabetes (range, 14%-77.5%) and 29% among patients with type 2 diabetes (range, 16.8%-49.2%), Ms. Lewis reports in the article, which was published in Diabetes Technology and Therapeutics.
“Cumulatively, this suggests there may be significant numbers of people with diabetes with EPI who are undiagnosed. People with diabetes who present with gastrointestinal symptoms – such as steatorrhea or changes in stool, bloating, and/or abdominal pain – should be screened for EPI. Diabetes specialists, gastroenterologists, and primary care providers should be aware of the high rates of prevalence of diabetes and EPI and recommend fecal elastase-1 screening for people with diabetes and GI symptoms,” Ms. Lewis writes.
Since the publication of her article, Ms. Lewis told this news organization, “I’ve gotten feedback from multiple diabetes and general providers that they will be changing their practice as a result of this paper, by screening people with diabetes who have GI symptoms for EPI, which is wonderful to hear.”
In addition, she noted that since she began blogging about EPI and diabetes last year following her own delayed diagnosis, “I have had at least half a dozen people with diabetes tell me that they’ve since sought screening for EPI after years of GI symptoms and ended up being diagnosed with EPI as well.”
Asked to comment, Romesh Khardori, MD, PhD, said in an interview, “it would be prudent to investigate EPI and treat it when confirmed. Consultation with a gastroenterologist colleague may be helpful. Treatment is quite rewarding.”
Data limitations; and don’t forget celiac disease and gastroparesis
However, as does Ms. Lewis, Dr. Khardori points to the limitations of the current literature.
“This review suffers from the lack of uniformity amongst the studies in terms of diagnosis and documentation of exocrine pancreatic insufficiency. Many studies lack a control group to draw any meaningful conclusions. Correlations with duration of diabetes, age of onset, symptoms, and glycemic control were mostly lacking,” says Dr. Khardori, now retired but formerly professor of medicine: endocrinology and metabolism at Eastern Virginia Medical School, Norfolk.
In general, the data suggest that PERT is safe and effective for people with diabetes and that it may reduce glycemic variability. However, “there are not many studies looking at glucose outcomes in detail, and only one study that has used CGM [continuous glucose monitoring] data, so this is a big area of need for future study,” Ms. Lewis told this news organization.
Ms. Lewis also reviewed the literature on the prevalence of two other diabetes-related gastrointestinal conditions, celiac disease and gastroparesis, “because anecdotally, it seems as though diabetes care providers and people with diabetes are more aware of those as causes of GI symptoms.”
In type 1 diabetes, the prevalence of both celiac disease and gastroparesis are reported at about 5%, in contrast to the 33% for EPI. Similarly, in type 2 diabetes, the reported prevalence of these two conditions are 1.3% and 1.6%, respectively, vs. 29% for EPI.
“This suggests to me that there is likely disproportionate screening for things like celiac [disease] and gastroparesis in diabetes, and that screening for EPI when people with diabetes present with GI symptoms is warranted,” Ms. Lewis said.
However, Dr. Khardori cautioned that those conditions may also be missed, noting, “Celiac disease often is undiagnosed and gastropathy or gastroparesis may be overlooked in a busy primary care clinic where most patients with diabetes mellitus get their care.”
Ms. Lewis and Dr. Khardori have disclosed no relevant financial relationships.
A version of this article first appeared on Medscape.com.
FROM DIABETES TECHNOLOGY AND THERAPEUTICS
A1c not linked to postop complications in kids with diabetes
TOPLINE:
- Delaying elective surgeries until A1c is consistently normalized may not be warranted, particularly because this is challenging to accomplish rapidly.
METHODOLOGY:
- A retrospective analysis was done of data from surgery and endocrinology medical records of 438 children aged 1-18 years with type 1 (72%) or type 2 diabetes (28%) undergoing elective noncardiac surgery at Texas Children’s Hospital, January 2011 to June 2021.
- Overall, 28% had an A1c less than 7.0%, 42% had A1c 7%-9%, and 30% had A1c greater than 9%.
- The primary outcome was defined as a new-onset postoperative systemic infection, wound complication, or ketosis.
TAKEAWAY:
- The incidence of any postoperative systemic infections was 0.91% (n = 4); postoperative wound disruption, 3.33% (n = 19); and postoperative ketosis, 3.89% (n = 17).
- A1c levels were not associated with any postoperative systemic infections, wound complications, or ketosis.
- No other preoperative factors, including diabetes type, body mass index, or procedure type, were association with these complications.
IN PRACTICE:
“Current recommendations suggest consulting with the diabetes team before surgery and if glycemic status is suboptimal to consider delaying surgery and, if surgery cannot be delayed, considering admission to the hospital before surgery for acute optimization of glycemia, However, there is no guidance on the level of elevated A1c that should prompt consideration of delaying surgery. This issue is of crucial importance because necessary elective surgery or diagnostic procedures may be delayed unnecessarily or for longer than needed in children with elevated A1c because of the difficulty of improving A1c levels rapidly.”
STUDY DETAILS:
The study was led by Grace Kim, MD, of the division of diabetes and endocrinology, Texas Children’s Hospital, Houston. It was published online August 1, 2023, in Diabetes Care.
LIMITATIONS:
- The postoperative complication rate was low.
- Only elective procedures were included.
DISCLOSURES:
The authors have no disclosures.
A version of this article first appeared on Medscape.com.
TOPLINE:
- Delaying elective surgeries until A1c is consistently normalized may not be warranted, particularly because this is challenging to accomplish rapidly.
METHODOLOGY:
- A retrospective analysis was done of data from surgery and endocrinology medical records of 438 children aged 1-18 years with type 1 (72%) or type 2 diabetes (28%) undergoing elective noncardiac surgery at Texas Children’s Hospital, January 2011 to June 2021.
- Overall, 28% had an A1c less than 7.0%, 42% had A1c 7%-9%, and 30% had A1c greater than 9%.
- The primary outcome was defined as a new-onset postoperative systemic infection, wound complication, or ketosis.
TAKEAWAY:
- The incidence of any postoperative systemic infections was 0.91% (n = 4); postoperative wound disruption, 3.33% (n = 19); and postoperative ketosis, 3.89% (n = 17).
- A1c levels were not associated with any postoperative systemic infections, wound complications, or ketosis.
- No other preoperative factors, including diabetes type, body mass index, or procedure type, were association with these complications.
IN PRACTICE:
“Current recommendations suggest consulting with the diabetes team before surgery and if glycemic status is suboptimal to consider delaying surgery and, if surgery cannot be delayed, considering admission to the hospital before surgery for acute optimization of glycemia, However, there is no guidance on the level of elevated A1c that should prompt consideration of delaying surgery. This issue is of crucial importance because necessary elective surgery or diagnostic procedures may be delayed unnecessarily or for longer than needed in children with elevated A1c because of the difficulty of improving A1c levels rapidly.”
STUDY DETAILS:
The study was led by Grace Kim, MD, of the division of diabetes and endocrinology, Texas Children’s Hospital, Houston. It was published online August 1, 2023, in Diabetes Care.
LIMITATIONS:
- The postoperative complication rate was low.
- Only elective procedures were included.
DISCLOSURES:
The authors have no disclosures.
A version of this article first appeared on Medscape.com.
TOPLINE:
- Delaying elective surgeries until A1c is consistently normalized may not be warranted, particularly because this is challenging to accomplish rapidly.
METHODOLOGY:
- A retrospective analysis was done of data from surgery and endocrinology medical records of 438 children aged 1-18 years with type 1 (72%) or type 2 diabetes (28%) undergoing elective noncardiac surgery at Texas Children’s Hospital, January 2011 to June 2021.
- Overall, 28% had an A1c less than 7.0%, 42% had A1c 7%-9%, and 30% had A1c greater than 9%.
- The primary outcome was defined as a new-onset postoperative systemic infection, wound complication, or ketosis.
TAKEAWAY:
- The incidence of any postoperative systemic infections was 0.91% (n = 4); postoperative wound disruption, 3.33% (n = 19); and postoperative ketosis, 3.89% (n = 17).
- A1c levels were not associated with any postoperative systemic infections, wound complications, or ketosis.
- No other preoperative factors, including diabetes type, body mass index, or procedure type, were association with these complications.
IN PRACTICE:
“Current recommendations suggest consulting with the diabetes team before surgery and if glycemic status is suboptimal to consider delaying surgery and, if surgery cannot be delayed, considering admission to the hospital before surgery for acute optimization of glycemia, However, there is no guidance on the level of elevated A1c that should prompt consideration of delaying surgery. This issue is of crucial importance because necessary elective surgery or diagnostic procedures may be delayed unnecessarily or for longer than needed in children with elevated A1c because of the difficulty of improving A1c levels rapidly.”
STUDY DETAILS:
The study was led by Grace Kim, MD, of the division of diabetes and endocrinology, Texas Children’s Hospital, Houston. It was published online August 1, 2023, in Diabetes Care.
LIMITATIONS:
- The postoperative complication rate was low.
- Only elective procedures were included.
DISCLOSURES:
The authors have no disclosures.
A version of this article first appeared on Medscape.com.
FROM DIABETES CARE
‘Emerging’ biomarker may predict mild cognitive impairment years before symptoms
, new research indicates.
“Our study shows that low NPTX2 levels are predictive of MCI symptom onset more than 7 years in advance, including among individuals who are in late middle age,” said study investigator Anja Soldan, PhD, associate professor of neurology, Johns Hopkins University School of Medicine, Baltimore.
NPTX2 is still considered an “emerging biomarker” because knowledge about this protein is limited, Dr. Soldan noted.
Prior studies have shown that levels of NPTX2 are lower in people with MCI and dementia than in those with normal cognition and that low levels of this protein in people with MCI are associated with an increased risk of developing dementia.
“Our study extends these prior findings by showing that low protein levels are also associated with the onset of MCI symptoms,” Dr. Soldan said.
The study was published online in Annals of Neurology.
New therapeutic target?
The researchers measured NPTX2, as well as amyloid beta 42/40, phosphorylated (p)-tau181, and total (t)-tau in CSF collected longitudinally from 269 cognitively normal adults from the BIOCARD study.
The average age at baseline was 57.7 years. Nearly all were White, 59% were women, most were college educated, and three-quarters had a close relative with Alzheimer’s disease.
During a mean follow-up average of 16 years, 77 participants progressed to MCI or dementia within or after 7 years of baseline measurements.
In Cox regression models, lower baseline NPTX2 levels were associated with an earlier time to MCI symptom onset (hazard ratio, 0.76; P = .023). This association was significant for progression within 7 years (P = .036) and after 7 years from baseline (P = .001), the investigators reported.
Adults who progressed to MCI had, on average, about 15% lower levels of NPTX2 at baseline, compared with adults who remained cognitively normal.
Baseline NPTX2 levels improved prediction of time to MCI symptom onset after accounting for baseline Alzheimer’s disease biomarker levels (P < .01), and NPTX2 did not interact with the CSF Alzheimer’s disease biomarkers or APOE-ε4 genetic status.
Higher baseline levels of p-tau181 and t-tau were associated with higher baseline NPTX2 levels (both P < .001) and with greater declines in NPTX2 over time, suggesting that NPTX2 may decline in response to tau pathology, the investigators suggested.
Dr. Soldan said NPTX2 may be “a novel target” for developing new therapeutics for Alzheimer’s disease and other dementing and neurodegenerative disorders, as it is not an Alzheimer’s disease–specific protein.
“Efforts are underway for developing a sensitive way to measure NPTX2 brain levels in blood, which could then help clinicians identify individuals at greatest risk for cognitive decline,” she explained.
“Other next steps are to examine how changes in NPTX2 over time relate to changes in brain structure and function and to identify factors that alter levels of NPTX2, including genetic factors and potentially modifiable lifestyle factors,” Dr. Soldan said.
“If having higher levels of NPTX2 in the brain provides some resilience against developing symptoms of Alzheimer’s disease, it would be great if we could somehow increase levels of the protein,” she noted.
Caveats, cautionary notes
Commenting on this research, Christopher Weber, PhD, Alzheimer’s Association director of global science initiatives, said, “Research has shown that when NPTX2 levels are low, it may lead to weaker connections between neurons and could potentially affect cognitive functions, including memory and learning.”
“This new study found an association between lower levels of NPTX2 in CSF and earlier time to MCI symptom onset, and when combined with other established Alzheimer’s biomarkers, they found that NPTX2 improved the prediction of Alzheimer’s symptom onset,” Dr. Weber said.
“This is in line with previous research that suggests NPTX2 levels are associated with an increased risk of progression from MCI to Alzheimer’s dementia,” Dr. Weber said.
However, he noted some limitations of the study. “Participants were primarily White [and] highly educated, and therefore findings may not be generalizable to a real-world population,” he cautioned.
Dr. Weber said it’s also important to note that NPTX2 is not considered an Alzheimer’s-specific biomarker but rather a marker of synaptic activity and neurodegeneration. “The exact role of NPTX2 in predicting dementia is unknown,” Dr. Weber said.
He said that more studies with larger, more diverse cohorts are needed to fully understand its significance as a biomarker or therapeutic target for neurodegenerative diseases, as well as to develop a blood test for NPTX2.
The study was supported by the National Institutes of Health. Dr. Soldan and Dr. Weber report no relevant financial relationships.
A version of this article first appeared on Medscape.com.
, new research indicates.
“Our study shows that low NPTX2 levels are predictive of MCI symptom onset more than 7 years in advance, including among individuals who are in late middle age,” said study investigator Anja Soldan, PhD, associate professor of neurology, Johns Hopkins University School of Medicine, Baltimore.
NPTX2 is still considered an “emerging biomarker” because knowledge about this protein is limited, Dr. Soldan noted.
Prior studies have shown that levels of NPTX2 are lower in people with MCI and dementia than in those with normal cognition and that low levels of this protein in people with MCI are associated with an increased risk of developing dementia.
“Our study extends these prior findings by showing that low protein levels are also associated with the onset of MCI symptoms,” Dr. Soldan said.
The study was published online in Annals of Neurology.
New therapeutic target?
The researchers measured NPTX2, as well as amyloid beta 42/40, phosphorylated (p)-tau181, and total (t)-tau in CSF collected longitudinally from 269 cognitively normal adults from the BIOCARD study.
The average age at baseline was 57.7 years. Nearly all were White, 59% were women, most were college educated, and three-quarters had a close relative with Alzheimer’s disease.
During a mean follow-up average of 16 years, 77 participants progressed to MCI or dementia within or after 7 years of baseline measurements.
In Cox regression models, lower baseline NPTX2 levels were associated with an earlier time to MCI symptom onset (hazard ratio, 0.76; P = .023). This association was significant for progression within 7 years (P = .036) and after 7 years from baseline (P = .001), the investigators reported.
Adults who progressed to MCI had, on average, about 15% lower levels of NPTX2 at baseline, compared with adults who remained cognitively normal.
Baseline NPTX2 levels improved prediction of time to MCI symptom onset after accounting for baseline Alzheimer’s disease biomarker levels (P < .01), and NPTX2 did not interact with the CSF Alzheimer’s disease biomarkers or APOE-ε4 genetic status.
Higher baseline levels of p-tau181 and t-tau were associated with higher baseline NPTX2 levels (both P < .001) and with greater declines in NPTX2 over time, suggesting that NPTX2 may decline in response to tau pathology, the investigators suggested.
Dr. Soldan said NPTX2 may be “a novel target” for developing new therapeutics for Alzheimer’s disease and other dementing and neurodegenerative disorders, as it is not an Alzheimer’s disease–specific protein.
“Efforts are underway for developing a sensitive way to measure NPTX2 brain levels in blood, which could then help clinicians identify individuals at greatest risk for cognitive decline,” she explained.
“Other next steps are to examine how changes in NPTX2 over time relate to changes in brain structure and function and to identify factors that alter levels of NPTX2, including genetic factors and potentially modifiable lifestyle factors,” Dr. Soldan said.
“If having higher levels of NPTX2 in the brain provides some resilience against developing symptoms of Alzheimer’s disease, it would be great if we could somehow increase levels of the protein,” she noted.
Caveats, cautionary notes
Commenting on this research, Christopher Weber, PhD, Alzheimer’s Association director of global science initiatives, said, “Research has shown that when NPTX2 levels are low, it may lead to weaker connections between neurons and could potentially affect cognitive functions, including memory and learning.”
“This new study found an association between lower levels of NPTX2 in CSF and earlier time to MCI symptom onset, and when combined with other established Alzheimer’s biomarkers, they found that NPTX2 improved the prediction of Alzheimer’s symptom onset,” Dr. Weber said.
“This is in line with previous research that suggests NPTX2 levels are associated with an increased risk of progression from MCI to Alzheimer’s dementia,” Dr. Weber said.
However, he noted some limitations of the study. “Participants were primarily White [and] highly educated, and therefore findings may not be generalizable to a real-world population,” he cautioned.
Dr. Weber said it’s also important to note that NPTX2 is not considered an Alzheimer’s-specific biomarker but rather a marker of synaptic activity and neurodegeneration. “The exact role of NPTX2 in predicting dementia is unknown,” Dr. Weber said.
He said that more studies with larger, more diverse cohorts are needed to fully understand its significance as a biomarker or therapeutic target for neurodegenerative diseases, as well as to develop a blood test for NPTX2.
The study was supported by the National Institutes of Health. Dr. Soldan and Dr. Weber report no relevant financial relationships.
A version of this article first appeared on Medscape.com.
, new research indicates.
“Our study shows that low NPTX2 levels are predictive of MCI symptom onset more than 7 years in advance, including among individuals who are in late middle age,” said study investigator Anja Soldan, PhD, associate professor of neurology, Johns Hopkins University School of Medicine, Baltimore.
NPTX2 is still considered an “emerging biomarker” because knowledge about this protein is limited, Dr. Soldan noted.
Prior studies have shown that levels of NPTX2 are lower in people with MCI and dementia than in those with normal cognition and that low levels of this protein in people with MCI are associated with an increased risk of developing dementia.
“Our study extends these prior findings by showing that low protein levels are also associated with the onset of MCI symptoms,” Dr. Soldan said.
The study was published online in Annals of Neurology.
New therapeutic target?
The researchers measured NPTX2, as well as amyloid beta 42/40, phosphorylated (p)-tau181, and total (t)-tau in CSF collected longitudinally from 269 cognitively normal adults from the BIOCARD study.
The average age at baseline was 57.7 years. Nearly all were White, 59% were women, most were college educated, and three-quarters had a close relative with Alzheimer’s disease.
During a mean follow-up average of 16 years, 77 participants progressed to MCI or dementia within or after 7 years of baseline measurements.
In Cox regression models, lower baseline NPTX2 levels were associated with an earlier time to MCI symptom onset (hazard ratio, 0.76; P = .023). This association was significant for progression within 7 years (P = .036) and after 7 years from baseline (P = .001), the investigators reported.
Adults who progressed to MCI had, on average, about 15% lower levels of NPTX2 at baseline, compared with adults who remained cognitively normal.
Baseline NPTX2 levels improved prediction of time to MCI symptom onset after accounting for baseline Alzheimer’s disease biomarker levels (P < .01), and NPTX2 did not interact with the CSF Alzheimer’s disease biomarkers or APOE-ε4 genetic status.
Higher baseline levels of p-tau181 and t-tau were associated with higher baseline NPTX2 levels (both P < .001) and with greater declines in NPTX2 over time, suggesting that NPTX2 may decline in response to tau pathology, the investigators suggested.
Dr. Soldan said NPTX2 may be “a novel target” for developing new therapeutics for Alzheimer’s disease and other dementing and neurodegenerative disorders, as it is not an Alzheimer’s disease–specific protein.
“Efforts are underway for developing a sensitive way to measure NPTX2 brain levels in blood, which could then help clinicians identify individuals at greatest risk for cognitive decline,” she explained.
“Other next steps are to examine how changes in NPTX2 over time relate to changes in brain structure and function and to identify factors that alter levels of NPTX2, including genetic factors and potentially modifiable lifestyle factors,” Dr. Soldan said.
“If having higher levels of NPTX2 in the brain provides some resilience against developing symptoms of Alzheimer’s disease, it would be great if we could somehow increase levels of the protein,” she noted.
Caveats, cautionary notes
Commenting on this research, Christopher Weber, PhD, Alzheimer’s Association director of global science initiatives, said, “Research has shown that when NPTX2 levels are low, it may lead to weaker connections between neurons and could potentially affect cognitive functions, including memory and learning.”
“This new study found an association between lower levels of NPTX2 in CSF and earlier time to MCI symptom onset, and when combined with other established Alzheimer’s biomarkers, they found that NPTX2 improved the prediction of Alzheimer’s symptom onset,” Dr. Weber said.
“This is in line with previous research that suggests NPTX2 levels are associated with an increased risk of progression from MCI to Alzheimer’s dementia,” Dr. Weber said.
However, he noted some limitations of the study. “Participants were primarily White [and] highly educated, and therefore findings may not be generalizable to a real-world population,” he cautioned.
Dr. Weber said it’s also important to note that NPTX2 is not considered an Alzheimer’s-specific biomarker but rather a marker of synaptic activity and neurodegeneration. “The exact role of NPTX2 in predicting dementia is unknown,” Dr. Weber said.
He said that more studies with larger, more diverse cohorts are needed to fully understand its significance as a biomarker or therapeutic target for neurodegenerative diseases, as well as to develop a blood test for NPTX2.
The study was supported by the National Institutes of Health. Dr. Soldan and Dr. Weber report no relevant financial relationships.
A version of this article first appeared on Medscape.com.
FROM ANNALS OF NEUROLOGY
Inhaling pleasant scents during sleep tied to a dramatic boost in cognition
In a small, randomized controlled trial researchers found that when cognitively normal individuals were exposed to the scent of an essential oil for 2 hours every night over 6 months, they experienced a 226% improvement in memory compared with a control group who received only a trace amount of the diffused scent.
In addition, functional magnetic resonance imaging (fMRI) showed that those in the enriched group had improved functioning of the left uncinate fasciculus, an area of the brain linked to memory and cognition, which typically declines with age.
“To my knowledge, that level of [memory] improvement is far greater than anything that has been reported for healthy older adults and we also found a critical memory pathway in their brains improved to a similar extent relative to unenriched older adults,” senior investigator Michael Leon, PhD, professor emeritus, University of California, Irvine, said in an interview.
The study was published online in Frontiers of Neuroscience.
The brain’s “superhighway”
Olfactory enrichment “involves the daily exposure of individuals to multiple odorants” and has been shown in mouse models to improve memory and neurogenesis, the investigators noted.
A previous study showed that exposure to individual essential oils for 30 minutes a day over 3 months induced neurogenesis in the olfactory bulb and the hippocampus.
“The olfactory system is the only sense that has a direct ‘superhighway’ input to the memory centers areas of the brain; all the other senses have to reach those brain areas through what you might call the ‘side streets’ of the brain, and so consequently, they have much less impact on maintaining the health of those memory centers.”
When olfaction is compromised, “the memory centers of the brain start to deteriorate and, conversely, when people are given olfactory enrichment, their memory areas become larger and more functional,” he added.
Olfactory dysfunction is the first symptom of Alzheimer’s disease (AD) and is also found in virtually all neurological and psychiatric disorders.
“I’ve counted 68 of them – including anorexia, anxiety, [attention-deficit/hyperactivity disorder], depression, epilepsy, and stroke. In fact, by mid-life, your all-cause mortality can be predicted by your ability to smell things,” Dr. Leon said.
Dr. Leon and colleagues previously developed an effective treatment for autism using environmental enrichment that focused on odor stimulation, along with stimulating other senses. “We then considered the possibility that olfactory enrichment alone might improve brain function.”
Rose, orange, eucalyptus …
For the study, the researchers randomly assigned 43 older adults, aged 60-85 years, to receive either nightly exposure to essential oil scents delivered via a diffuser (n = 20; mean [SD] age, 70.1 [6.6] years) or to a sham control with only trace amounts of odorants (n = 23; mean age, 69.2 [7.1] years) for a period of 6 months.
The intervention group was exposed to a single odorant, delivered through a diffuser, for 2 hours nightly, rotating through seven pleasant aromas each week. They included rose, orange, eucalyptus, lemon, peppermint, rosemary, and lavender scents.
All participants completed a battery of tests at baseline, including the Mini-Mental State Examination (MMSE), which confirmed normal cognitive functioning. At baseline and after a 6-month follow-up, participants completed the Rey Auditory Verbal Learning Test (RAVLT) as well as three subsets of the Wechsler Adult Intelligence Scale–Third Edition (WAIS-III).
Olfactory system function was assessed using “Sniffin Sticks,” allowing the researchers to determine if olfactory enrichment enhanced olfactory performance.
Participants underwent fMRI at baseline and again at 6 months.
Brain imaging results showed a “clear, statistically significant 226% difference between enriched and control older adults in performance on the RAVLT, which evaluates learning and memory (timepoint × group interaction; F = 6.63; P = .02; Cohen’s d = 1.08; a “large effect size”).
They also found a significant change in the mean diffusivity of the left uncinate fasciculus in the enriched group compared with the controls (timepoint × group interaction; F = 4.39; P = .043; h 2 p = .101; a “medium-size effect”).
The uncinate fasciculus is a “major pathway” connecting the basolateral amygdala and the entorhinal cortex to the prefrontal cortex. This pathway deteriorates in aging and in AD and “has been suggested to play a role in mediating episodic memory, language, socio-emotional processing, and selecting among competing memories during retrieval.”
No significant differences were found between the groups in olfactory ability.
Limitations of the study include its small sample size. The investigators hope the findings will “stimulate larger scale clinical trials systematically testing the therapeutic efficacy of olfactory enrichment in treating memory loss in older adults.”
Exciting but preliminary
Commenting for this article, Donald Wilson, PhD, professor of child and adolescent psychiatry and of neuroscience and physiology, the Child Study Center, NYU Langone Medical Center, New York, said that multiple studies have “demonstrated that problems with sense of smell are associated with and sometimes can precede other symptoms for many disorders, including AD, Parkinson’s disease, and depression.”
Recent work has suggested that this relationship can be “bidirectional” – for example, losing one’s sense of smell might promote depression, while depressive disorder might lead to impaired smell, according to Dr. Wilson, also director and senior research scientist, the Emotional Brain Institute, Nathan Kline Institute for Psychiatric Research. He was not involved with the study.
This “two-way interaction” may raise the possibility that “improving olfaction could impact nonolfactory disorders.”
This paper “brings together” previous research findings to show that odors during bedtime can improve some aspects of cognitive function and circuits that are known to be important for memory and cognition – which Dr. Wilson called “a very exciting, though relatively preliminary, finding.”
A caveat is that several measures of cognitive function were assessed and only one (verbal memory) showed clear improvement.
Nevertheless, there’s “very strong interest now in the olfactory and nonolfactory aspects of odor training and this training expands the training possibilities to sleep. This could be a powerful tool for cognitive improvement and/or rescue if follow-up studies support these findings,” Dr. Wilson said.
A version of this article appeared on Medscape.com.
In a small, randomized controlled trial researchers found that when cognitively normal individuals were exposed to the scent of an essential oil for 2 hours every night over 6 months, they experienced a 226% improvement in memory compared with a control group who received only a trace amount of the diffused scent.
In addition, functional magnetic resonance imaging (fMRI) showed that those in the enriched group had improved functioning of the left uncinate fasciculus, an area of the brain linked to memory and cognition, which typically declines with age.
“To my knowledge, that level of [memory] improvement is far greater than anything that has been reported for healthy older adults and we also found a critical memory pathway in their brains improved to a similar extent relative to unenriched older adults,” senior investigator Michael Leon, PhD, professor emeritus, University of California, Irvine, said in an interview.
The study was published online in Frontiers of Neuroscience.
The brain’s “superhighway”
Olfactory enrichment “involves the daily exposure of individuals to multiple odorants” and has been shown in mouse models to improve memory and neurogenesis, the investigators noted.
A previous study showed that exposure to individual essential oils for 30 minutes a day over 3 months induced neurogenesis in the olfactory bulb and the hippocampus.
“The olfactory system is the only sense that has a direct ‘superhighway’ input to the memory centers areas of the brain; all the other senses have to reach those brain areas through what you might call the ‘side streets’ of the brain, and so consequently, they have much less impact on maintaining the health of those memory centers.”
When olfaction is compromised, “the memory centers of the brain start to deteriorate and, conversely, when people are given olfactory enrichment, their memory areas become larger and more functional,” he added.
Olfactory dysfunction is the first symptom of Alzheimer’s disease (AD) and is also found in virtually all neurological and psychiatric disorders.
“I’ve counted 68 of them – including anorexia, anxiety, [attention-deficit/hyperactivity disorder], depression, epilepsy, and stroke. In fact, by mid-life, your all-cause mortality can be predicted by your ability to smell things,” Dr. Leon said.
Dr. Leon and colleagues previously developed an effective treatment for autism using environmental enrichment that focused on odor stimulation, along with stimulating other senses. “We then considered the possibility that olfactory enrichment alone might improve brain function.”
Rose, orange, eucalyptus …
For the study, the researchers randomly assigned 43 older adults, aged 60-85 years, to receive either nightly exposure to essential oil scents delivered via a diffuser (n = 20; mean [SD] age, 70.1 [6.6] years) or to a sham control with only trace amounts of odorants (n = 23; mean age, 69.2 [7.1] years) for a period of 6 months.
The intervention group was exposed to a single odorant, delivered through a diffuser, for 2 hours nightly, rotating through seven pleasant aromas each week. They included rose, orange, eucalyptus, lemon, peppermint, rosemary, and lavender scents.
All participants completed a battery of tests at baseline, including the Mini-Mental State Examination (MMSE), which confirmed normal cognitive functioning. At baseline and after a 6-month follow-up, participants completed the Rey Auditory Verbal Learning Test (RAVLT) as well as three subsets of the Wechsler Adult Intelligence Scale–Third Edition (WAIS-III).
Olfactory system function was assessed using “Sniffin Sticks,” allowing the researchers to determine if olfactory enrichment enhanced olfactory performance.
Participants underwent fMRI at baseline and again at 6 months.
Brain imaging results showed a “clear, statistically significant 226% difference between enriched and control older adults in performance on the RAVLT, which evaluates learning and memory (timepoint × group interaction; F = 6.63; P = .02; Cohen’s d = 1.08; a “large effect size”).
They also found a significant change in the mean diffusivity of the left uncinate fasciculus in the enriched group compared with the controls (timepoint × group interaction; F = 4.39; P = .043; h 2 p = .101; a “medium-size effect”).
The uncinate fasciculus is a “major pathway” connecting the basolateral amygdala and the entorhinal cortex to the prefrontal cortex. This pathway deteriorates in aging and in AD and “has been suggested to play a role in mediating episodic memory, language, socio-emotional processing, and selecting among competing memories during retrieval.”
No significant differences were found between the groups in olfactory ability.
Limitations of the study include its small sample size. The investigators hope the findings will “stimulate larger scale clinical trials systematically testing the therapeutic efficacy of olfactory enrichment in treating memory loss in older adults.”
Exciting but preliminary
Commenting for this article, Donald Wilson, PhD, professor of child and adolescent psychiatry and of neuroscience and physiology, the Child Study Center, NYU Langone Medical Center, New York, said that multiple studies have “demonstrated that problems with sense of smell are associated with and sometimes can precede other symptoms for many disorders, including AD, Parkinson’s disease, and depression.”
Recent work has suggested that this relationship can be “bidirectional” – for example, losing one’s sense of smell might promote depression, while depressive disorder might lead to impaired smell, according to Dr. Wilson, also director and senior research scientist, the Emotional Brain Institute, Nathan Kline Institute for Psychiatric Research. He was not involved with the study.
This “two-way interaction” may raise the possibility that “improving olfaction could impact nonolfactory disorders.”
This paper “brings together” previous research findings to show that odors during bedtime can improve some aspects of cognitive function and circuits that are known to be important for memory and cognition – which Dr. Wilson called “a very exciting, though relatively preliminary, finding.”
A caveat is that several measures of cognitive function were assessed and only one (verbal memory) showed clear improvement.
Nevertheless, there’s “very strong interest now in the olfactory and nonolfactory aspects of odor training and this training expands the training possibilities to sleep. This could be a powerful tool for cognitive improvement and/or rescue if follow-up studies support these findings,” Dr. Wilson said.
A version of this article appeared on Medscape.com.
In a small, randomized controlled trial researchers found that when cognitively normal individuals were exposed to the scent of an essential oil for 2 hours every night over 6 months, they experienced a 226% improvement in memory compared with a control group who received only a trace amount of the diffused scent.
In addition, functional magnetic resonance imaging (fMRI) showed that those in the enriched group had improved functioning of the left uncinate fasciculus, an area of the brain linked to memory and cognition, which typically declines with age.
“To my knowledge, that level of [memory] improvement is far greater than anything that has been reported for healthy older adults and we also found a critical memory pathway in their brains improved to a similar extent relative to unenriched older adults,” senior investigator Michael Leon, PhD, professor emeritus, University of California, Irvine, said in an interview.
The study was published online in Frontiers of Neuroscience.
The brain’s “superhighway”
Olfactory enrichment “involves the daily exposure of individuals to multiple odorants” and has been shown in mouse models to improve memory and neurogenesis, the investigators noted.
A previous study showed that exposure to individual essential oils for 30 minutes a day over 3 months induced neurogenesis in the olfactory bulb and the hippocampus.
“The olfactory system is the only sense that has a direct ‘superhighway’ input to the memory centers areas of the brain; all the other senses have to reach those brain areas through what you might call the ‘side streets’ of the brain, and so consequently, they have much less impact on maintaining the health of those memory centers.”
When olfaction is compromised, “the memory centers of the brain start to deteriorate and, conversely, when people are given olfactory enrichment, their memory areas become larger and more functional,” he added.
Olfactory dysfunction is the first symptom of Alzheimer’s disease (AD) and is also found in virtually all neurological and psychiatric disorders.
“I’ve counted 68 of them – including anorexia, anxiety, [attention-deficit/hyperactivity disorder], depression, epilepsy, and stroke. In fact, by mid-life, your all-cause mortality can be predicted by your ability to smell things,” Dr. Leon said.
Dr. Leon and colleagues previously developed an effective treatment for autism using environmental enrichment that focused on odor stimulation, along with stimulating other senses. “We then considered the possibility that olfactory enrichment alone might improve brain function.”
Rose, orange, eucalyptus …
For the study, the researchers randomly assigned 43 older adults, aged 60-85 years, to receive either nightly exposure to essential oil scents delivered via a diffuser (n = 20; mean [SD] age, 70.1 [6.6] years) or to a sham control with only trace amounts of odorants (n = 23; mean age, 69.2 [7.1] years) for a period of 6 months.
The intervention group was exposed to a single odorant, delivered through a diffuser, for 2 hours nightly, rotating through seven pleasant aromas each week. They included rose, orange, eucalyptus, lemon, peppermint, rosemary, and lavender scents.
All participants completed a battery of tests at baseline, including the Mini-Mental State Examination (MMSE), which confirmed normal cognitive functioning. At baseline and after a 6-month follow-up, participants completed the Rey Auditory Verbal Learning Test (RAVLT) as well as three subsets of the Wechsler Adult Intelligence Scale–Third Edition (WAIS-III).
Olfactory system function was assessed using “Sniffin Sticks,” allowing the researchers to determine if olfactory enrichment enhanced olfactory performance.
Participants underwent fMRI at baseline and again at 6 months.
Brain imaging results showed a “clear, statistically significant 226% difference between enriched and control older adults in performance on the RAVLT, which evaluates learning and memory (timepoint × group interaction; F = 6.63; P = .02; Cohen’s d = 1.08; a “large effect size”).
They also found a significant change in the mean diffusivity of the left uncinate fasciculus in the enriched group compared with the controls (timepoint × group interaction; F = 4.39; P = .043; h 2 p = .101; a “medium-size effect”).
The uncinate fasciculus is a “major pathway” connecting the basolateral amygdala and the entorhinal cortex to the prefrontal cortex. This pathway deteriorates in aging and in AD and “has been suggested to play a role in mediating episodic memory, language, socio-emotional processing, and selecting among competing memories during retrieval.”
No significant differences were found between the groups in olfactory ability.
Limitations of the study include its small sample size. The investigators hope the findings will “stimulate larger scale clinical trials systematically testing the therapeutic efficacy of olfactory enrichment in treating memory loss in older adults.”
Exciting but preliminary
Commenting for this article, Donald Wilson, PhD, professor of child and adolescent psychiatry and of neuroscience and physiology, the Child Study Center, NYU Langone Medical Center, New York, said that multiple studies have “demonstrated that problems with sense of smell are associated with and sometimes can precede other symptoms for many disorders, including AD, Parkinson’s disease, and depression.”
Recent work has suggested that this relationship can be “bidirectional” – for example, losing one’s sense of smell might promote depression, while depressive disorder might lead to impaired smell, according to Dr. Wilson, also director and senior research scientist, the Emotional Brain Institute, Nathan Kline Institute for Psychiatric Research. He was not involved with the study.
This “two-way interaction” may raise the possibility that “improving olfaction could impact nonolfactory disorders.”
This paper “brings together” previous research findings to show that odors during bedtime can improve some aspects of cognitive function and circuits that are known to be important for memory and cognition – which Dr. Wilson called “a very exciting, though relatively preliminary, finding.”
A caveat is that several measures of cognitive function were assessed and only one (verbal memory) showed clear improvement.
Nevertheless, there’s “very strong interest now in the olfactory and nonolfactory aspects of odor training and this training expands the training possibilities to sleep. This could be a powerful tool for cognitive improvement and/or rescue if follow-up studies support these findings,” Dr. Wilson said.
A version of this article appeared on Medscape.com.
FROM FRONTIERS IN NEUROSCIENCE
Thrombectomy improves outcomes in pediatric stroke
A matched case-control study followed 52 patients in Canada and Australia with acute stroke and assessed functional outcomes at 3 months for those who received thrombectomy, compared with those who did not. Patients receiving the procedure had significantly improved clinical outcomes (odds ratio [OR], 3.76). The procedure is the standard of care for adults with large vessel occlusion (LVO) stroke, but limited data exist for children.
“In the absence of a randomized trial, this case-control study demonstrates better clinical outcomes with thrombectomy than medical management for pediatric patients aged 2 to 18 years with anterior circulation LVO stroke,” the authors concluded. The study was published in JAMA Neurology.
Improved results
Untreated LVO stroke is associated with poor outcomes, indicated in this study with scoring based on the modified Rankin Scale. Based on this scoring, 53.8% of patients who were managed conservatively had poor outcomes (moderate disability or greater) at 3 months, confirming previous findings. The data were drawn from five hospitals in Australia and Canada between January 2011 and April 2022.
Removing blood clots with mechanical thrombectomy resulted in improved outcomes 3 months after stroke for the patients included in the study, compared with the neuroprotective measures of medical therapy alone. The improved outcomes persisted in the final available follow-up (OR, 3.65).
In adults, thrombectomy has previously been demonstrated to be a safe and effective treatment for LVO stroke and is currently the standard of care. This study sought to expand the data for pediatric patients, for whom stroke is rarer and difficult to diagnose.
The authors cautioned, however, that the outcomes are from hospitals with pediatric neurology expertise and should not be generalized to settings without specialists.
Case-control study
While previous population-based studies of children with LVO stroke found that conservative treatment was associated with poor outcomes, these studies may include significant selection bias. The investigators chose to conduct the case-control study as an alternative to a randomized control trial, which would require withholding treatment from some patients and would not be considered ethical.
The study included 26 patients in each cohort, either receiving mechanical thrombectomy or medical treatment alone. The investigators matched patients by site and side of occlusion, age, and sex. Cases that could not be matched by site of occlusion, the primary criterion, were excluded.
With this methodology, the investigators reduced the impact of selection bias with the aim of providing “the next highest level of comparative evidence,” they stated in the study. However, they also noted that, without randomization, there is likely still some selection bias present.
The two cohorts were not significantly different based on factors such as sex or age. All patients in the study presented within 24 hours of symptom onset, with most eligible for thrombectomy by adult standards. There was a difference between the two cohorts in the timing of arrival to a dedicated hospital and imaging. “Our triage, imaging, and decision-making pathways require streamlining,” the authors concluded, regarding the difference.
‘A heterogeneous condition’
In a comment, Ratika Srivastava, MD, a pediatric neurologist at the University of Alberta, Edmonton, said she was glad to see a well-designed study dedicated to pediatric stroke. Neurologists have traditionally extrapolated from research on adult stroke due to the rarity of pediatric stroke and difficulty of diagnosis.
While physicians have previously relied on findings in adults, stroke presents differently in children. “The challenge is that it’s such a heterogeneous condition,” said Dr. Srivastava, who was not involved in the study. In children, stroke may have several different etiologies, such as a lesion in the heart or arterial disease. “Sometimes it’s amenable to taking the clot out and sometimes it’s not. So you have to figure out: Are they a good candidate for thrombectomy?” This study helps demonstrate that thrombectomy is a good option for some children with LVO stroke, she said.
The study was independently supported. Dr. Srivastava reported no relevant financial relationships.
A version of this article first appeared on Medscape.com.
A matched case-control study followed 52 patients in Canada and Australia with acute stroke and assessed functional outcomes at 3 months for those who received thrombectomy, compared with those who did not. Patients receiving the procedure had significantly improved clinical outcomes (odds ratio [OR], 3.76). The procedure is the standard of care for adults with large vessel occlusion (LVO) stroke, but limited data exist for children.
“In the absence of a randomized trial, this case-control study demonstrates better clinical outcomes with thrombectomy than medical management for pediatric patients aged 2 to 18 years with anterior circulation LVO stroke,” the authors concluded. The study was published in JAMA Neurology.
Improved results
Untreated LVO stroke is associated with poor outcomes, indicated in this study with scoring based on the modified Rankin Scale. Based on this scoring, 53.8% of patients who were managed conservatively had poor outcomes (moderate disability or greater) at 3 months, confirming previous findings. The data were drawn from five hospitals in Australia and Canada between January 2011 and April 2022.
Removing blood clots with mechanical thrombectomy resulted in improved outcomes 3 months after stroke for the patients included in the study, compared with the neuroprotective measures of medical therapy alone. The improved outcomes persisted in the final available follow-up (OR, 3.65).
In adults, thrombectomy has previously been demonstrated to be a safe and effective treatment for LVO stroke and is currently the standard of care. This study sought to expand the data for pediatric patients, for whom stroke is rarer and difficult to diagnose.
The authors cautioned, however, that the outcomes are from hospitals with pediatric neurology expertise and should not be generalized to settings without specialists.
Case-control study
While previous population-based studies of children with LVO stroke found that conservative treatment was associated with poor outcomes, these studies may include significant selection bias. The investigators chose to conduct the case-control study as an alternative to a randomized control trial, which would require withholding treatment from some patients and would not be considered ethical.
The study included 26 patients in each cohort, either receiving mechanical thrombectomy or medical treatment alone. The investigators matched patients by site and side of occlusion, age, and sex. Cases that could not be matched by site of occlusion, the primary criterion, were excluded.
With this methodology, the investigators reduced the impact of selection bias with the aim of providing “the next highest level of comparative evidence,” they stated in the study. However, they also noted that, without randomization, there is likely still some selection bias present.
The two cohorts were not significantly different based on factors such as sex or age. All patients in the study presented within 24 hours of symptom onset, with most eligible for thrombectomy by adult standards. There was a difference between the two cohorts in the timing of arrival to a dedicated hospital and imaging. “Our triage, imaging, and decision-making pathways require streamlining,” the authors concluded, regarding the difference.
‘A heterogeneous condition’
In a comment, Ratika Srivastava, MD, a pediatric neurologist at the University of Alberta, Edmonton, said she was glad to see a well-designed study dedicated to pediatric stroke. Neurologists have traditionally extrapolated from research on adult stroke due to the rarity of pediatric stroke and difficulty of diagnosis.
While physicians have previously relied on findings in adults, stroke presents differently in children. “The challenge is that it’s such a heterogeneous condition,” said Dr. Srivastava, who was not involved in the study. In children, stroke may have several different etiologies, such as a lesion in the heart or arterial disease. “Sometimes it’s amenable to taking the clot out and sometimes it’s not. So you have to figure out: Are they a good candidate for thrombectomy?” This study helps demonstrate that thrombectomy is a good option for some children with LVO stroke, she said.
The study was independently supported. Dr. Srivastava reported no relevant financial relationships.
A version of this article first appeared on Medscape.com.
A matched case-control study followed 52 patients in Canada and Australia with acute stroke and assessed functional outcomes at 3 months for those who received thrombectomy, compared with those who did not. Patients receiving the procedure had significantly improved clinical outcomes (odds ratio [OR], 3.76). The procedure is the standard of care for adults with large vessel occlusion (LVO) stroke, but limited data exist for children.
“In the absence of a randomized trial, this case-control study demonstrates better clinical outcomes with thrombectomy than medical management for pediatric patients aged 2 to 18 years with anterior circulation LVO stroke,” the authors concluded. The study was published in JAMA Neurology.
Improved results
Untreated LVO stroke is associated with poor outcomes, indicated in this study with scoring based on the modified Rankin Scale. Based on this scoring, 53.8% of patients who were managed conservatively had poor outcomes (moderate disability or greater) at 3 months, confirming previous findings. The data were drawn from five hospitals in Australia and Canada between January 2011 and April 2022.
Removing blood clots with mechanical thrombectomy resulted in improved outcomes 3 months after stroke for the patients included in the study, compared with the neuroprotective measures of medical therapy alone. The improved outcomes persisted in the final available follow-up (OR, 3.65).
In adults, thrombectomy has previously been demonstrated to be a safe and effective treatment for LVO stroke and is currently the standard of care. This study sought to expand the data for pediatric patients, for whom stroke is rarer and difficult to diagnose.
The authors cautioned, however, that the outcomes are from hospitals with pediatric neurology expertise and should not be generalized to settings without specialists.
Case-control study
While previous population-based studies of children with LVO stroke found that conservative treatment was associated with poor outcomes, these studies may include significant selection bias. The investigators chose to conduct the case-control study as an alternative to a randomized control trial, which would require withholding treatment from some patients and would not be considered ethical.
The study included 26 patients in each cohort, either receiving mechanical thrombectomy or medical treatment alone. The investigators matched patients by site and side of occlusion, age, and sex. Cases that could not be matched by site of occlusion, the primary criterion, were excluded.
With this methodology, the investigators reduced the impact of selection bias with the aim of providing “the next highest level of comparative evidence,” they stated in the study. However, they also noted that, without randomization, there is likely still some selection bias present.
The two cohorts were not significantly different based on factors such as sex or age. All patients in the study presented within 24 hours of symptom onset, with most eligible for thrombectomy by adult standards. There was a difference between the two cohorts in the timing of arrival to a dedicated hospital and imaging. “Our triage, imaging, and decision-making pathways require streamlining,” the authors concluded, regarding the difference.
‘A heterogeneous condition’
In a comment, Ratika Srivastava, MD, a pediatric neurologist at the University of Alberta, Edmonton, said she was glad to see a well-designed study dedicated to pediatric stroke. Neurologists have traditionally extrapolated from research on adult stroke due to the rarity of pediatric stroke and difficulty of diagnosis.
While physicians have previously relied on findings in adults, stroke presents differently in children. “The challenge is that it’s such a heterogeneous condition,” said Dr. Srivastava, who was not involved in the study. In children, stroke may have several different etiologies, such as a lesion in the heart or arterial disease. “Sometimes it’s amenable to taking the clot out and sometimes it’s not. So you have to figure out: Are they a good candidate for thrombectomy?” This study helps demonstrate that thrombectomy is a good option for some children with LVO stroke, she said.
The study was independently supported. Dr. Srivastava reported no relevant financial relationships.
A version of this article first appeared on Medscape.com.
FROM JAMA NEUROLOGY
Kombucha benefits type 2 diabetes, study suggests
TOPLINE:
The sample size was too small for statistical significance.
METHODOLOGY:
- Prospective, randomized, double-blinded, crossover study at a single-center urban hospital system.
- A total of 12 participants with type 2 diabetes were randomly assigned to consume 240 mL of either a kombucha product or placebo daily with dinner for 4 weeks.
- After an 8-week washout, they were switched to the other product for another 4 weeks.
- Fasting blood glucose levels were self-determined at baseline and at 1 and 4 weeks, and questionnaires were used to assess secondary health outcomes.
- Questionnaire data were analyzed for all 12 participants, but only 7 who completed the study were included in the analysis of fasting blood glucose.
TAKEAWAY:
- Kombucha significantly lowered average fasting blood glucose levels at week 4, compared with baseline (164 vs. 116 mg/dL; P = .035), while the placebo was not associated with statistically significant change (162 vs. 141 mg/dL; P = .078).
- Among just the five participants with baseline fasting glucose > 130 mg/dL, kombucha consumption was associated with a mean fasting blood glucose decrease of 74.3 mg/dL, significantly greater than the 15.9 mg/dL drop with placebo (P = .017).
- On cultural enumeration, the kombucha contained mostly lactic acid bacteria, acetic acid bacteria, and yeast, with molds present.
IN PRACTICE:
“Kombucha is a growing part of the beverage market in the United States and the world, driven, in part, by the wide range of suggested health benefits. However, nearly all of these benefits are based on in vitro or animal studies, and human clinical trials are needed to validate biological outcomes.”
SOURCE:
The study was conducted by Chagai Mendelson, of MedStar Georgetown University Hospital, Washington, and colleagues. It was published in Frontiers in Nutrition.
LIMITATIONS:
- The number of participants was small, and attrition was high.
- Glucose levels were self-reported.
- Only one kombucha was studied.
DISCLOSURES:
One author is a cofounder of Synbiotic Health and another has a financial interest in the company. The other authors have no disclosures. Kombucha and placebo drinks were donated by Craft Kombucha, but the company did not have access to the data, and no authors have financial ties with that company.
A version of this article first appeared on Medscape.com.
TOPLINE:
The sample size was too small for statistical significance.
METHODOLOGY:
- Prospective, randomized, double-blinded, crossover study at a single-center urban hospital system.
- A total of 12 participants with type 2 diabetes were randomly assigned to consume 240 mL of either a kombucha product or placebo daily with dinner for 4 weeks.
- After an 8-week washout, they were switched to the other product for another 4 weeks.
- Fasting blood glucose levels were self-determined at baseline and at 1 and 4 weeks, and questionnaires were used to assess secondary health outcomes.
- Questionnaire data were analyzed for all 12 participants, but only 7 who completed the study were included in the analysis of fasting blood glucose.
TAKEAWAY:
- Kombucha significantly lowered average fasting blood glucose levels at week 4, compared with baseline (164 vs. 116 mg/dL; P = .035), while the placebo was not associated with statistically significant change (162 vs. 141 mg/dL; P = .078).
- Among just the five participants with baseline fasting glucose > 130 mg/dL, kombucha consumption was associated with a mean fasting blood glucose decrease of 74.3 mg/dL, significantly greater than the 15.9 mg/dL drop with placebo (P = .017).
- On cultural enumeration, the kombucha contained mostly lactic acid bacteria, acetic acid bacteria, and yeast, with molds present.
IN PRACTICE:
“Kombucha is a growing part of the beverage market in the United States and the world, driven, in part, by the wide range of suggested health benefits. However, nearly all of these benefits are based on in vitro or animal studies, and human clinical trials are needed to validate biological outcomes.”
SOURCE:
The study was conducted by Chagai Mendelson, of MedStar Georgetown University Hospital, Washington, and colleagues. It was published in Frontiers in Nutrition.
LIMITATIONS:
- The number of participants was small, and attrition was high.
- Glucose levels were self-reported.
- Only one kombucha was studied.
DISCLOSURES:
One author is a cofounder of Synbiotic Health and another has a financial interest in the company. The other authors have no disclosures. Kombucha and placebo drinks were donated by Craft Kombucha, but the company did not have access to the data, and no authors have financial ties with that company.
A version of this article first appeared on Medscape.com.
TOPLINE:
The sample size was too small for statistical significance.
METHODOLOGY:
- Prospective, randomized, double-blinded, crossover study at a single-center urban hospital system.
- A total of 12 participants with type 2 diabetes were randomly assigned to consume 240 mL of either a kombucha product or placebo daily with dinner for 4 weeks.
- After an 8-week washout, they were switched to the other product for another 4 weeks.
- Fasting blood glucose levels were self-determined at baseline and at 1 and 4 weeks, and questionnaires were used to assess secondary health outcomes.
- Questionnaire data were analyzed for all 12 participants, but only 7 who completed the study were included in the analysis of fasting blood glucose.
TAKEAWAY:
- Kombucha significantly lowered average fasting blood glucose levels at week 4, compared with baseline (164 vs. 116 mg/dL; P = .035), while the placebo was not associated with statistically significant change (162 vs. 141 mg/dL; P = .078).
- Among just the five participants with baseline fasting glucose > 130 mg/dL, kombucha consumption was associated with a mean fasting blood glucose decrease of 74.3 mg/dL, significantly greater than the 15.9 mg/dL drop with placebo (P = .017).
- On cultural enumeration, the kombucha contained mostly lactic acid bacteria, acetic acid bacteria, and yeast, with molds present.
IN PRACTICE:
“Kombucha is a growing part of the beverage market in the United States and the world, driven, in part, by the wide range of suggested health benefits. However, nearly all of these benefits are based on in vitro or animal studies, and human clinical trials are needed to validate biological outcomes.”
SOURCE:
The study was conducted by Chagai Mendelson, of MedStar Georgetown University Hospital, Washington, and colleagues. It was published in Frontiers in Nutrition.
LIMITATIONS:
- The number of participants was small, and attrition was high.
- Glucose levels were self-reported.
- Only one kombucha was studied.
DISCLOSURES:
One author is a cofounder of Synbiotic Health and another has a financial interest in the company. The other authors have no disclosures. Kombucha and placebo drinks were donated by Craft Kombucha, but the company did not have access to the data, and no authors have financial ties with that company.
A version of this article first appeared on Medscape.com.
FROM FRONTIERS IN NUTRITION