Ob.Gyn. News

A new study provides more evidence that HPV infection doesn’t raise the risk of poor outcomes in women who undergo fertility treatment via in vitro fertilization with fresh embryos. In fact, HPV-positive women were somewhat more likely than HPV-negative women to become pregnant (relative risk, 1.20; 95% confidence interval, 1.03-1.39) and have live births (RR, 1.39; 95% CI, 1.13-1.70), researchers reported Oct. 24 at the American Society for Reproductive Medicine’s 2022 meeting .

“This evidence should reassure women that being HPV positive will not affect live birth rates after a fresh embryo transfer cycle,” said study coauthor and ob.gyn. Nina Vyas, MD, a clinical fellow at Weill Cornell Medicine, New York, in an interview.

According to Dr. Vyas, previous studies have offered conflicting results about whether HPV affects pregnancy outcomes. In 2006, for example, her group performed a pilot study (Fertil Steril. Jun 16. doi: 10.1016/j.fertnstert.2006.01.051) that linked lower pregnancy rates to HPV-positive tests on the day of egg retrieval.

“We sought to reevaluate this finding in a retrospective manner,” Dr. Vyas said. “You’re taking eggs out of their home, injecting with sperm, and putting them back. There’s so much that we don’t know, and we want to make sure there’s no extra risk.”

Also, she added, “prior studies had a relatively low sample size. We sought to use our patient volume to address this question on a larger scale. Our current study benefits from a large sample size and using the clinically meaningful endpoint of live birth as our primary outcome.”

For the new study, researchers retrospectively analyzed 1,333 patients (of 2,209 screened) who received first fresh embryo transfers from 2017 to 2019. All had cytology or HPV status documented per cervical cancer screening guidelines within 6 months before embryos were transferred.

The researchers looked at only fresh embryo transfers “so we could account for pregnancy outcomes closest to the documented HPV status at the time of egg retrieval,” Dr. Vyas said.

Ten percent (133) of patients were HPV positive. Of those, 60.1% became pregnant, and 43.6% of them had live births. Of the HPV-negative women (90% of subjects, n = 1,200), 52.2% became pregnant and 33.5% had live births. The researchers didn’t calculate P values, but Dr. Vyas said an analysis determined that the differences between HPV-positive and HPV-negative women were statistically significant.

The study size doesn’t allow researchers to determine whether HPV actually has a protective effect on pregnancy/live birth rates in IVF, Dr. Vyas said. Even if it did, the virus is dangerous.

What else could explain the discrepancy? “Some elements driving this could the smaller sample size of the HPV-positive group, differences in HPV prevalence between the general population and our population,” she said, “or other confounding factors we were not able to appreciate due to the limitations of the retrospective study.”

Researchers also reported that they found “no significant difference in biochemical or spontaneous abortion rates” between HPV-positive and HPV-negative women.

What is the message of the study? “Women with HPV can rest assured that they won’t have worse outcomes than their non-HPV [infected] counterparts after a fresh embryo transfer cycle,” Dr. Vyas said.

In an interview, McGill University, Montreal, epidemiologist Helen Trottier, PhD, MSc, noted that she recently coauthored a study that linked persistent HPV infection in pregnancy to premature births. The findings appear convincing, she said: “I think we can say that HPV is associated with preterm birth.”

She praised the new study but noted “the relative risks that are reported need to be adjusted for race and possibly other factors.”

Dr. Vyas said that kind of adjustment will occur in a future study that’s in progress. “We are now prospectively enrolling patients and collecting cytology data to understand whether there might be a difference for women with higher malignancy potential/different types of HPV genotypes.”

The study authors have no disclosures. Disclosure information for Dr. Trottier was unavailable.

A new study provides more evidence that HPV infection doesn’t raise the risk of poor outcomes in women who undergo fertility treatment via in vitro fertilization with fresh embryos. In fact, HPV-positive women were somewhat more likely than HPV-negative women to become pregnant (relative risk, 1.20; 95% confidence interval, 1.03-1.39) and have live births (RR, 1.39; 95% CI, 1.13-1.70), researchers reported Oct. 24 at the American Society for Reproductive Medicine’s 2022 meeting .

“This evidence should reassure women that being HPV positive will not affect live birth rates after a fresh embryo transfer cycle,” said study coauthor and ob.gyn. Nina Vyas, MD, a clinical fellow at Weill Cornell Medicine, New York, in an interview.

According to Dr. Vyas, previous studies have offered conflicting results about whether HPV affects pregnancy outcomes. In 2006, for example, her group performed a pilot study (Fertil Steril. Jun 16. doi: 10.1016/j.fertnstert.2006.01.051) that linked lower pregnancy rates to HPV-positive tests on the day of egg retrieval.

“We sought to reevaluate this finding in a retrospective manner,” Dr. Vyas said. “You’re taking eggs out of their home, injecting with sperm, and putting them back. There’s so much that we don’t know, and we want to make sure there’s no extra risk.”

Also, she added, “prior studies had a relatively low sample size. We sought to use our patient volume to address this question on a larger scale. Our current study benefits from a large sample size and using the clinically meaningful endpoint of live birth as our primary outcome.”

For the new study, researchers retrospectively analyzed 1,333 patients (of 2,209 screened) who received first fresh embryo transfers from 2017 to 2019. All had cytology or HPV status documented per cervical cancer screening guidelines within 6 months before embryos were transferred.

The researchers looked at only fresh embryo transfers “so we could account for pregnancy outcomes closest to the documented HPV status at the time of egg retrieval,” Dr. Vyas said.

Ten percent (133) of patients were HPV positive. Of those, 60.1% became pregnant, and 43.6% of them had live births. Of the HPV-negative women (90% of subjects, n = 1,200), 52.2% became pregnant and 33.5% had live births. The researchers didn’t calculate P values, but Dr. Vyas said an analysis determined that the differences between HPV-positive and HPV-negative women were statistically significant.

The study size doesn’t allow researchers to determine whether HPV actually has a protective effect on pregnancy/live birth rates in IVF, Dr. Vyas said. Even if it did, the virus is dangerous.

What else could explain the discrepancy? “Some elements driving this could the smaller sample size of the HPV-positive group, differences in HPV prevalence between the general population and our population,” she said, “or other confounding factors we were not able to appreciate due to the limitations of the retrospective study.”

Researchers also reported that they found “no significant difference in biochemical or spontaneous abortion rates” between HPV-positive and HPV-negative women.

What is the message of the study? “Women with HPV can rest assured that they won’t have worse outcomes than their non-HPV [infected] counterparts after a fresh embryo transfer cycle,” Dr. Vyas said.

In an interview, McGill University, Montreal, epidemiologist Helen Trottier, PhD, MSc, noted that she recently coauthored a study that linked persistent HPV infection in pregnancy to premature births. The findings appear convincing, she said: “I think we can say that HPV is associated with preterm birth.”

She praised the new study but noted “the relative risks that are reported need to be adjusted for race and possibly other factors.”

Dr. Vyas said that kind of adjustment will occur in a future study that’s in progress. “We are now prospectively enrolling patients and collecting cytology data to understand whether there might be a difference for women with higher malignancy potential/different types of HPV genotypes.”

The study authors have no disclosures. Disclosure information for Dr. Trottier was unavailable.

A new study provides more evidence that HPV infection doesn’t raise the risk of poor outcomes in women who undergo fertility treatment via in vitro fertilization with fresh embryos. In fact, HPV-positive women were somewhat more likely than HPV-negative women to become pregnant (relative risk, 1.20; 95% confidence interval, 1.03-1.39) and have live births (RR, 1.39; 95% CI, 1.13-1.70), researchers reported Oct. 24 at the American Society for Reproductive Medicine’s 2022 meeting .

“This evidence should reassure women that being HPV positive will not affect live birth rates after a fresh embryo transfer cycle,” said study coauthor and ob.gyn. Nina Vyas, MD, a clinical fellow at Weill Cornell Medicine, New York, in an interview.

According to Dr. Vyas, previous studies have offered conflicting results about whether HPV affects pregnancy outcomes. In 2006, for example, her group performed a pilot study (Fertil Steril. Jun 16. doi: 10.1016/j.fertnstert.2006.01.051) that linked lower pregnancy rates to HPV-positive tests on the day of egg retrieval.

“We sought to reevaluate this finding in a retrospective manner,” Dr. Vyas said. “You’re taking eggs out of their home, injecting with sperm, and putting them back. There’s so much that we don’t know, and we want to make sure there’s no extra risk.”

Also, she added, “prior studies had a relatively low sample size. We sought to use our patient volume to address this question on a larger scale. Our current study benefits from a large sample size and using the clinically meaningful endpoint of live birth as our primary outcome.”

For the new study, researchers retrospectively analyzed 1,333 patients (of 2,209 screened) who received first fresh embryo transfers from 2017 to 2019. All had cytology or HPV status documented per cervical cancer screening guidelines within 6 months before embryos were transferred.

The researchers looked at only fresh embryo transfers “so we could account for pregnancy outcomes closest to the documented HPV status at the time of egg retrieval,” Dr. Vyas said.

Ten percent (133) of patients were HPV positive. Of those, 60.1% became pregnant, and 43.6% of them had live births. Of the HPV-negative women (90% of subjects, n = 1,200), 52.2% became pregnant and 33.5% had live births. The researchers didn’t calculate P values, but Dr. Vyas said an analysis determined that the differences between HPV-positive and HPV-negative women were statistically significant.

The study size doesn’t allow researchers to determine whether HPV actually has a protective effect on pregnancy/live birth rates in IVF, Dr. Vyas said. Even if it did, the virus is dangerous.

What else could explain the discrepancy? “Some elements driving this could the smaller sample size of the HPV-positive group, differences in HPV prevalence between the general population and our population,” she said, “or other confounding factors we were not able to appreciate due to the limitations of the retrospective study.”

Researchers also reported that they found “no significant difference in biochemical or spontaneous abortion rates” between HPV-positive and HPV-negative women.

What is the message of the study? “Women with HPV can rest assured that they won’t have worse outcomes than their non-HPV [infected] counterparts after a fresh embryo transfer cycle,” Dr. Vyas said.

In an interview, McGill University, Montreal, epidemiologist Helen Trottier, PhD, MSc, noted that she recently coauthored a study that linked persistent HPV infection in pregnancy to premature births. The findings appear convincing, she said: “I think we can say that HPV is associated with preterm birth.”

She praised the new study but noted “the relative risks that are reported need to be adjusted for race and possibly other factors.”

Dr. Vyas said that kind of adjustment will occur in a future study that’s in progress. “We are now prospectively enrolling patients and collecting cytology data to understand whether there might be a difference for women with higher malignancy potential/different types of HPV genotypes.”

The study authors have no disclosures. Disclosure information for Dr. Trottier was unavailable.

Before the introduction of insulin, there were few reported cases of pregnancy complicated by diabetes because women with the disease too often did not live to childbearing age, and when they did, they were often counseled to terminate their pregnancies. Perinatal and maternal mortality in the limited number of reported pregnancies were 70% and 40%, respectively,¹ making the risks of continuing the pregnancy quite high.

After insulin became available, maternal mortality dropped dramatically, down to a few percent. Perinatal mortality also declined, but it took several decades to achieve a similar magnitude of reduction.² Today, with insulin therapy and tight glucose control as well as improved perinatal care, almost all women with diabetes can contemplate pregnancy with greater hope for normal outcomes.

Problems persist, however. Maternal diabetes continues to cause a variety of adverse outcomes, including infants large for gestational age, prematurity, and structural birth defects. Birth defects and prematurity, in fact, are the top causes of the unacceptably high infant mortality rate in the United States – a rate that is about 70% higher than the average in comparable developed countries.³

Infant mortality is considered an indicator of population health and of the development of a country; to reduce its rate, we must address these two areas.

Women with type 1 and type 2 diabetes are five times more likely to have a child with birth defects than are nondiabetic women.⁴ Up to 10% of women with preexisting diabetes will have fetuses with a major congenital malformation.⁵

Over the years we have been striving in our Center for Birth Defects Research to understand the pathomechanisms and the molecular and epigenetic alterations behind the high rates of birth defects in the offspring of women with preexisting diabetes. We have focused on heart defects and neural tube defects (particularly the latter), which together cause significant mortality, morbidity, disability, and human suffering.

Using animal models that mimic human diabetic pregnancy, we have made significant strides in our understanding of the mechanisms, uncovering molecular pathways involving oxidative stress, senescence/premature cellular aging, and epigenetic modifications (Figure 1). Understanding these pathways is providing us, in turn, with potential therapeutic targets and approaches that may be used in the future to prevent birth defects in women who enter pregnancy with type 1 or type 2 diabetes.

Unraveling the role of oxidative stress

Our mouse models accurately reflect the human conditions of diabetes in pregnancy and diabetic embryopathy. Offspring of mice with type 1 and type 2 diabetes have a similarly higher rate of neural tube defects and congenital heart disease, compared to mice without diabetes. We observe a similar incidence of anencephaly and spina bifida, and of cardiac septation defects in the mouse embryo hearts, for instance.

A primary mechanism and causal event of diabetic embryopathy is hyperglycemia-induced apoptosis in embryonic cells. Excessive cell death in the neural epithelium or in the developing heart leads to abnormal organogenesis and dysfunctional developmental events that cause birth defects. We have identified pathways leading to apoptosis, and have found that many of these pathways crosstalk with each other.

Hyperglycemia induces oxidative stress – one of these pathways – by causing sustained generation of reactive oxygen species. The cells’ mitochondrial function is significantly impaired by the hyperglycemia response, and this diabetes-induced mitochondrial dysfunction further increases the production of reactive oxygen species and a weakening of the endogenous cellular antioxidant systems, both of which then exacerbate oxidative stress.

Our research has detailed what happens downstream. We’ve learned that oxidative stress in embryos exposed to maternal diabetes activates a cascade of proapoptotic kinase signaling molecules – for example, protein kinase C isoforms such as PKCalpha; apoptosis signal-regulating kinase 1; and c-Jun-N-terminal kinases – that ultimately lead to abnormal cell death in the neuroepithelium before neural tube closure (Figure 2).⁵

Hyperglycemia also alters membrane biochemistry in the developing embryo, suppressing lipids including arachidonic acid and myoinositol, and induces the elevation of other molecules that cause newly synthesized proteins to be misfolded. A build-up of misfolded/unfolded proteins triggers or exacerbates endoplasmic reticulum stress, which, like oxidative stress, plays a role in the activation of proapoptotic kinase signaling and apoptosis.⁶

When we’ve deleted genes for some of the proapoptotic kinase–signaling intermediates, or otherwise inhibited oxidative and endoplasmic reticulum stresses, we’ve been able to ameliorate neural cell apoptosis and the formation of neural tube defects. Studying the processes both forward and backward gives us confidence that the pathways are real and important, and that altering the pathways can alter the outcomes.

 

Reduced autophagy and induction of cellular senescence

Just as mitochondria are negatively affected by hyperglycemic conditions, so are autophagosomes – organelles that play a key role in removing abnormal or damaged stem cells and cellular components (including unfolded protein aggregates) and in maintaining cellular homeostasis. A high level of autophagy is essential for neural tube closure as well as cardiac morphogenesis.

In our models, maternal diabetes significantly suppressed the process of autophagy in neuroepithelial cells. We have identified responsible molecular intermediates and a key regulating gene for autophagy impairment and have found that deletion of the gene restores autophagy and reduces the development of neural tube defects.⁴ Administration of a naturally occurring compound, trehalose, which reactivates autophagy, had a similar effect.⁷Exposure to hyperglycemia not only causes cell death and suppresses autophagy, it also impairs other aspects of cellular function. More recently, we have shown that cells in the neuroepithelium become quiescent and cease proliferating. The quiescent cells, those cells with premature aging markers, also produce cytokines that influence the functioning and development of neighboring cells, causing additional cell death.

All told, premature senescence in the neuroepithelium adversely affects the neurulation process, leading to neural tube defects. In our mouse model, the senomorphic agent rapamycin suppressed cellular senescence, reduced the number of apoptotic neuroepithelial cells, and reduced the formation of neural tube defects.⁸

The role of epigenetics, future interventions

Epigenetics – the process by which gene expression and function can be modified by environmental conditions without modification of the DNA sequence – has become an additional area of focus in diabetic embryopathy. Our lab has studied the overexpression of both DNA methyltransferases (DNMTs) that cause DNA hypermethylation, and of microRNAs (miRNAs) that can suppress gene expression at the posttranscriptional level. Both are considered to be primary epigenetic mechanisms involved in human diseases and it appears that they are influential in the incidence of birth defects in diabetic mothers.

In our mouse models, maternal diabetes induces DNA hypermethylation via the increase of DNMTs, leading to the silencing of genes essential for neural tube closure and formation of the developing heart. MiRNAs also play a role; in addition to finding altered DNMT activity in the neural epithelium and other tissues of diabetes-exposed embryos, we also found altered miRNA expression. By deleting miRNA genes or by inhibiting DNMT activity through treatment with antioxidants, we saw significant reductions in birth defects.

In one study of the green tea polyphenol epigallocatechin gallate (EGCG), we demonstrated inhibition of diabetes-elevated DNMT expression and activity and suppression of DNA hypermethylation. The expression of genes essential for neural tube closure was restored, with a subsequent reduction in neural tube defects from 29.5% to 2% in embryos treated with EGCG.⁹

Our interventions to reverse or alter the mechanisms and pathways leading to birth defects have not only helped prove causation, but have given us hope for the future. Antioxidants are among the compounds that could be used as dietary supplements during pregnancy to prevent structural birth defects (Figure 3). Other compounds could activate the process of autophagy (for example, trehalose) and antisenescence compounds similar to rapamycin could be used to reduce numbers of senescent cells in the neuroepithelium or the developing heart.

Dr. Reece and Dr. Yang reported no relevant disclosures.

Dr. Reece, a maternal-fetal medicine specialist, is dean emeritus of the University of Maryland School of Medicine, former university executive vice president, endowed professor and director of CARTI, and codirector of the Center for Birth Defects.
Dr. Yang is professor of obstetrics, gynecology, and reproductive sciences and director, Center for the Study of Birth Defects at the University of Maryland School of Medicine, both in Baltimore.

*This story was updated on Nov. 3, 2022

References

1. Z Zhiyong and Reece EA. Clin Lab Med. 2013;33(2)207-33.

2. Reece EA and Coustan DR. Diabetes and obesity in women. Wolters Kluwer: 2019. 4th ed. (https://www.amazon.com/Diabetes-Obesity-Women-Albert-Reece/dp/1496390547).

3. The Peterson-KFF Health System Tracker. www.healthsystemtracker.org.

4. Wang F et al. Nat. Commun. 2017;8:15182.

5. Yang P et al. Am J Obstet Gynecol. 2015;212(5):569-79.

6. Li X et al. Diabetes. 2013 Feb;62(2):599-608.

7. Xu C et al. Am J Physiol Endocrinol Metab. 2013 Sep 1;305(5):E667-78.

8. Xu C et al. Sci Adv. 2021;7(27):eabf5089.

9. Zhong J et al. Am J Obstet Gynecol. 2016 Sep;215(3):368.e1-10.

Before the introduction of insulin, there were few reported cases of pregnancy complicated by diabetes because women with the disease too often did not live to childbearing age, and when they did, they were often counseled to terminate their pregnancies. Perinatal and maternal mortality in the limited number of reported pregnancies were 70% and 40%, respectively,¹ making the risks of continuing the pregnancy quite high.

After insulin became available, maternal mortality dropped dramatically, down to a few percent. Perinatal mortality also declined, but it took several decades to achieve a similar magnitude of reduction.² Today, with insulin therapy and tight glucose control as well as improved perinatal care, almost all women with diabetes can contemplate pregnancy with greater hope for normal outcomes.

Problems persist, however. Maternal diabetes continues to cause a variety of adverse outcomes, including infants large for gestational age, prematurity, and structural birth defects. Birth defects and prematurity, in fact, are the top causes of the unacceptably high infant mortality rate in the United States – a rate that is about 70% higher than the average in comparable developed countries.³

Infant mortality is considered an indicator of population health and of the development of a country; to reduce its rate, we must address these two areas.

Women with type 1 and type 2 diabetes are five times more likely to have a child with birth defects than are nondiabetic women.⁴ Up to 10% of women with preexisting diabetes will have fetuses with a major congenital malformation.⁵

Over the years we have been striving in our Center for Birth Defects Research to understand the pathomechanisms and the molecular and epigenetic alterations behind the high rates of birth defects in the offspring of women with preexisting diabetes. We have focused on heart defects and neural tube defects (particularly the latter), which together cause significant mortality, morbidity, disability, and human suffering.

Using animal models that mimic human diabetic pregnancy, we have made significant strides in our understanding of the mechanisms, uncovering molecular pathways involving oxidative stress, senescence/premature cellular aging, and epigenetic modifications (Figure 1). Understanding these pathways is providing us, in turn, with potential therapeutic targets and approaches that may be used in the future to prevent birth defects in women who enter pregnancy with type 1 or type 2 diabetes.

Unraveling the role of oxidative stress

Our mouse models accurately reflect the human conditions of diabetes in pregnancy and diabetic embryopathy. Offspring of mice with type 1 and type 2 diabetes have a similarly higher rate of neural tube defects and congenital heart disease, compared to mice without diabetes. We observe a similar incidence of anencephaly and spina bifida, and of cardiac septation defects in the mouse embryo hearts, for instance.

A primary mechanism and causal event of diabetic embryopathy is hyperglycemia-induced apoptosis in embryonic cells. Excessive cell death in the neural epithelium or in the developing heart leads to abnormal organogenesis and dysfunctional developmental events that cause birth defects. We have identified pathways leading to apoptosis, and have found that many of these pathways crosstalk with each other.

Hyperglycemia induces oxidative stress – one of these pathways – by causing sustained generation of reactive oxygen species. The cells’ mitochondrial function is significantly impaired by the hyperglycemia response, and this diabetes-induced mitochondrial dysfunction further increases the production of reactive oxygen species and a weakening of the endogenous cellular antioxidant systems, both of which then exacerbate oxidative stress.

Our research has detailed what happens downstream. We’ve learned that oxidative stress in embryos exposed to maternal diabetes activates a cascade of proapoptotic kinase signaling molecules – for example, protein kinase C isoforms such as PKCalpha; apoptosis signal-regulating kinase 1; and c-Jun-N-terminal kinases – that ultimately lead to abnormal cell death in the neuroepithelium before neural tube closure (Figure 2).⁵

Hyperglycemia also alters membrane biochemistry in the developing embryo, suppressing lipids including arachidonic acid and myoinositol, and induces the elevation of other molecules that cause newly synthesized proteins to be misfolded. A build-up of misfolded/unfolded proteins triggers or exacerbates endoplasmic reticulum stress, which, like oxidative stress, plays a role in the activation of proapoptotic kinase signaling and apoptosis.⁶

When we’ve deleted genes for some of the proapoptotic kinase–signaling intermediates, or otherwise inhibited oxidative and endoplasmic reticulum stresses, we’ve been able to ameliorate neural cell apoptosis and the formation of neural tube defects. Studying the processes both forward and backward gives us confidence that the pathways are real and important, and that altering the pathways can alter the outcomes.

 

Reduced autophagy and induction of cellular senescence

Just as mitochondria are negatively affected by hyperglycemic conditions, so are autophagosomes – organelles that play a key role in removing abnormal or damaged stem cells and cellular components (including unfolded protein aggregates) and in maintaining cellular homeostasis. A high level of autophagy is essential for neural tube closure as well as cardiac morphogenesis.

In our models, maternal diabetes significantly suppressed the process of autophagy in neuroepithelial cells. We have identified responsible molecular intermediates and a key regulating gene for autophagy impairment and have found that deletion of the gene restores autophagy and reduces the development of neural tube defects.⁴ Administration of a naturally occurring compound, trehalose, which reactivates autophagy, had a similar effect.⁷Exposure to hyperglycemia not only causes cell death and suppresses autophagy, it also impairs other aspects of cellular function. More recently, we have shown that cells in the neuroepithelium become quiescent and cease proliferating. The quiescent cells, those cells with premature aging markers, also produce cytokines that influence the functioning and development of neighboring cells, causing additional cell death.

All told, premature senescence in the neuroepithelium adversely affects the neurulation process, leading to neural tube defects. In our mouse model, the senomorphic agent rapamycin suppressed cellular senescence, reduced the number of apoptotic neuroepithelial cells, and reduced the formation of neural tube defects.⁸

The role of epigenetics, future interventions

Epigenetics – the process by which gene expression and function can be modified by environmental conditions without modification of the DNA sequence – has become an additional area of focus in diabetic embryopathy. Our lab has studied the overexpression of both DNA methyltransferases (DNMTs) that cause DNA hypermethylation, and of microRNAs (miRNAs) that can suppress gene expression at the posttranscriptional level. Both are considered to be primary epigenetic mechanisms involved in human diseases and it appears that they are influential in the incidence of birth defects in diabetic mothers.

In our mouse models, maternal diabetes induces DNA hypermethylation via the increase of DNMTs, leading to the silencing of genes essential for neural tube closure and formation of the developing heart. MiRNAs also play a role; in addition to finding altered DNMT activity in the neural epithelium and other tissues of diabetes-exposed embryos, we also found altered miRNA expression. By deleting miRNA genes or by inhibiting DNMT activity through treatment with antioxidants, we saw significant reductions in birth defects.

In one study of the green tea polyphenol epigallocatechin gallate (EGCG), we demonstrated inhibition of diabetes-elevated DNMT expression and activity and suppression of DNA hypermethylation. The expression of genes essential for neural tube closure was restored, with a subsequent reduction in neural tube defects from 29.5% to 2% in embryos treated with EGCG.⁹

Our interventions to reverse or alter the mechanisms and pathways leading to birth defects have not only helped prove causation, but have given us hope for the future. Antioxidants are among the compounds that could be used as dietary supplements during pregnancy to prevent structural birth defects (Figure 3). Other compounds could activate the process of autophagy (for example, trehalose) and antisenescence compounds similar to rapamycin could be used to reduce numbers of senescent cells in the neuroepithelium or the developing heart.

Dr. Reece and Dr. Yang reported no relevant disclosures.

Dr. Reece, a maternal-fetal medicine specialist, is dean emeritus of the University of Maryland School of Medicine, former university executive vice president, endowed professor and director of CARTI, and codirector of the Center for Birth Defects.
Dr. Yang is professor of obstetrics, gynecology, and reproductive sciences and director, Center for the Study of Birth Defects at the University of Maryland School of Medicine, both in Baltimore.

*This story was updated on Nov. 3, 2022

References

1. Z Zhiyong and Reece EA. Clin Lab Med. 2013;33(2)207-33.

2. Reece EA and Coustan DR. Diabetes and obesity in women. Wolters Kluwer: 2019. 4th ed. (https://www.amazon.com/Diabetes-Obesity-Women-Albert-Reece/dp/1496390547).

3. The Peterson-KFF Health System Tracker. www.healthsystemtracker.org.

4. Wang F et al. Nat. Commun. 2017;8:15182.

5. Yang P et al. Am J Obstet Gynecol. 2015;212(5):569-79.

6. Li X et al. Diabetes. 2013 Feb;62(2):599-608.

7. Xu C et al. Am J Physiol Endocrinol Metab. 2013 Sep 1;305(5):E667-78.

8. Xu C et al. Sci Adv. 2021;7(27):eabf5089.

9. Zhong J et al. Am J Obstet Gynecol. 2016 Sep;215(3):368.e1-10.

Before the introduction of insulin, there were few reported cases of pregnancy complicated by diabetes because women with the disease too often did not live to childbearing age, and when they did, they were often counseled to terminate their pregnancies. Perinatal and maternal mortality in the limited number of reported pregnancies were 70% and 40%, respectively,¹ making the risks of continuing the pregnancy quite high.

After insulin became available, maternal mortality dropped dramatically, down to a few percent. Perinatal mortality also declined, but it took several decades to achieve a similar magnitude of reduction.² Today, with insulin therapy and tight glucose control as well as improved perinatal care, almost all women with diabetes can contemplate pregnancy with greater hope for normal outcomes.

Problems persist, however. Maternal diabetes continues to cause a variety of adverse outcomes, including infants large for gestational age, prematurity, and structural birth defects. Birth defects and prematurity, in fact, are the top causes of the unacceptably high infant mortality rate in the United States – a rate that is about 70% higher than the average in comparable developed countries.³

Infant mortality is considered an indicator of population health and of the development of a country; to reduce its rate, we must address these two areas.

Women with type 1 and type 2 diabetes are five times more likely to have a child with birth defects than are nondiabetic women.⁴ Up to 10% of women with preexisting diabetes will have fetuses with a major congenital malformation.⁵

Over the years we have been striving in our Center for Birth Defects Research to understand the pathomechanisms and the molecular and epigenetic alterations behind the high rates of birth defects in the offspring of women with preexisting diabetes. We have focused on heart defects and neural tube defects (particularly the latter), which together cause significant mortality, morbidity, disability, and human suffering.

Using animal models that mimic human diabetic pregnancy, we have made significant strides in our understanding of the mechanisms, uncovering molecular pathways involving oxidative stress, senescence/premature cellular aging, and epigenetic modifications (Figure 1). Understanding these pathways is providing us, in turn, with potential therapeutic targets and approaches that may be used in the future to prevent birth defects in women who enter pregnancy with type 1 or type 2 diabetes.

Unraveling the role of oxidative stress

Our mouse models accurately reflect the human conditions of diabetes in pregnancy and diabetic embryopathy. Offspring of mice with type 1 and type 2 diabetes have a similarly higher rate of neural tube defects and congenital heart disease, compared to mice without diabetes. We observe a similar incidence of anencephaly and spina bifida, and of cardiac septation defects in the mouse embryo hearts, for instance.

A primary mechanism and causal event of diabetic embryopathy is hyperglycemia-induced apoptosis in embryonic cells. Excessive cell death in the neural epithelium or in the developing heart leads to abnormal organogenesis and dysfunctional developmental events that cause birth defects. We have identified pathways leading to apoptosis, and have found that many of these pathways crosstalk with each other.

Hyperglycemia induces oxidative stress – one of these pathways – by causing sustained generation of reactive oxygen species. The cells’ mitochondrial function is significantly impaired by the hyperglycemia response, and this diabetes-induced mitochondrial dysfunction further increases the production of reactive oxygen species and a weakening of the endogenous cellular antioxidant systems, both of which then exacerbate oxidative stress.

Our research has detailed what happens downstream. We’ve learned that oxidative stress in embryos exposed to maternal diabetes activates a cascade of proapoptotic kinase signaling molecules – for example, protein kinase C isoforms such as PKCalpha; apoptosis signal-regulating kinase 1; and c-Jun-N-terminal kinases – that ultimately lead to abnormal cell death in the neuroepithelium before neural tube closure (Figure 2).⁵

Hyperglycemia also alters membrane biochemistry in the developing embryo, suppressing lipids including arachidonic acid and myoinositol, and induces the elevation of other molecules that cause newly synthesized proteins to be misfolded. A build-up of misfolded/unfolded proteins triggers or exacerbates endoplasmic reticulum stress, which, like oxidative stress, plays a role in the activation of proapoptotic kinase signaling and apoptosis.⁶

When we’ve deleted genes for some of the proapoptotic kinase–signaling intermediates, or otherwise inhibited oxidative and endoplasmic reticulum stresses, we’ve been able to ameliorate neural cell apoptosis and the formation of neural tube defects. Studying the processes both forward and backward gives us confidence that the pathways are real and important, and that altering the pathways can alter the outcomes.

 

Reduced autophagy and induction of cellular senescence

Just as mitochondria are negatively affected by hyperglycemic conditions, so are autophagosomes – organelles that play a key role in removing abnormal or damaged stem cells and cellular components (including unfolded protein aggregates) and in maintaining cellular homeostasis. A high level of autophagy is essential for neural tube closure as well as cardiac morphogenesis.

In our models, maternal diabetes significantly suppressed the process of autophagy in neuroepithelial cells. We have identified responsible molecular intermediates and a key regulating gene for autophagy impairment and have found that deletion of the gene restores autophagy and reduces the development of neural tube defects.⁴ Administration of a naturally occurring compound, trehalose, which reactivates autophagy, had a similar effect.⁷Exposure to hyperglycemia not only causes cell death and suppresses autophagy, it also impairs other aspects of cellular function. More recently, we have shown that cells in the neuroepithelium become quiescent and cease proliferating. The quiescent cells, those cells with premature aging markers, also produce cytokines that influence the functioning and development of neighboring cells, causing additional cell death.

All told, premature senescence in the neuroepithelium adversely affects the neurulation process, leading to neural tube defects. In our mouse model, the senomorphic agent rapamycin suppressed cellular senescence, reduced the number of apoptotic neuroepithelial cells, and reduced the formation of neural tube defects.⁸

The role of epigenetics, future interventions

Epigenetics – the process by which gene expression and function can be modified by environmental conditions without modification of the DNA sequence – has become an additional area of focus in diabetic embryopathy. Our lab has studied the overexpression of both DNA methyltransferases (DNMTs) that cause DNA hypermethylation, and of microRNAs (miRNAs) that can suppress gene expression at the posttranscriptional level. Both are considered to be primary epigenetic mechanisms involved in human diseases and it appears that they are influential in the incidence of birth defects in diabetic mothers.

In our mouse models, maternal diabetes induces DNA hypermethylation via the increase of DNMTs, leading to the silencing of genes essential for neural tube closure and formation of the developing heart. MiRNAs also play a role; in addition to finding altered DNMT activity in the neural epithelium and other tissues of diabetes-exposed embryos, we also found altered miRNA expression. By deleting miRNA genes or by inhibiting DNMT activity through treatment with antioxidants, we saw significant reductions in birth defects.

In one study of the green tea polyphenol epigallocatechin gallate (EGCG), we demonstrated inhibition of diabetes-elevated DNMT expression and activity and suppression of DNA hypermethylation. The expression of genes essential for neural tube closure was restored, with a subsequent reduction in neural tube defects from 29.5% to 2% in embryos treated with EGCG.⁹

Our interventions to reverse or alter the mechanisms and pathways leading to birth defects have not only helped prove causation, but have given us hope for the future. Antioxidants are among the compounds that could be used as dietary supplements during pregnancy to prevent structural birth defects (Figure 3). Other compounds could activate the process of autophagy (for example, trehalose) and antisenescence compounds similar to rapamycin could be used to reduce numbers of senescent cells in the neuroepithelium or the developing heart.

Dr. Reece and Dr. Yang reported no relevant disclosures.

Dr. Reece, a maternal-fetal medicine specialist, is dean emeritus of the University of Maryland School of Medicine, former university executive vice president, endowed professor and director of CARTI, and codirector of the Center for Birth Defects.
Dr. Yang is professor of obstetrics, gynecology, and reproductive sciences and director, Center for the Study of Birth Defects at the University of Maryland School of Medicine, both in Baltimore.

*This story was updated on Nov. 3, 2022

References

1. Z Zhiyong and Reece EA. Clin Lab Med. 2013;33(2)207-33.

2. Reece EA and Coustan DR. Diabetes and obesity in women. Wolters Kluwer: 2019. 4th ed. (https://www.amazon.com/Diabetes-Obesity-Women-Albert-Reece/dp/1496390547).

3. The Peterson-KFF Health System Tracker. www.healthsystemtracker.org.

4. Wang F et al. Nat. Commun. 2017;8:15182.

5. Yang P et al. Am J Obstet Gynecol. 2015;212(5):569-79.

6. Li X et al. Diabetes. 2013 Feb;62(2):599-608.

7. Xu C et al. Am J Physiol Endocrinol Metab. 2013 Sep 1;305(5):E667-78.

8. Xu C et al. Sci Adv. 2021;7(27):eabf5089.

9. Zhong J et al. Am J Obstet Gynecol. 2016 Sep;215(3):368.e1-10.

Many issues surrounding pregnancy care of women with preexisting diabetes remain challenging, especially in light of the relentless increase in maternal morbidity and mortality in the United States and globally. Rising rates of death and severe morbidity in diabetic women have continued despite significant advances in insulin pharmacology and administration technology.

However, despite these advances in glucose monitoring and insulin administration, fetal mortality and childhood morbidity rates continue to climb. This is because critical fetal structural anomalies arise from developmental errors occurring in the embryonic period – between 2 and 13 weeks of gestation – a time when most women with preexisting diabetes are just entering into prenatal care, often with suboptimal glycemic control.

Thus, significant future progress in reducing fetal mortality and childhood disability in infants of diabetic mothers will depend upon effective interventions in the first trimester while embryogenesis and critical organ formation are underway.

Dr. Moore is professor emeritus of maternal-fetal medicine and chair emeritus in the department of obstetrics, gynecology, and reproductive sciences at UC San Diego Health. He reported no disclosures.

*This story was updated on Nov. 3, 2022.

Many issues surrounding pregnancy care of women with preexisting diabetes remain challenging, especially in light of the relentless increase in maternal morbidity and mortality in the United States and globally. Rising rates of death and severe morbidity in diabetic women have continued despite significant advances in insulin pharmacology and administration technology.

However, despite these advances in glucose monitoring and insulin administration, fetal mortality and childhood morbidity rates continue to climb. This is because critical fetal structural anomalies arise from developmental errors occurring in the embryonic period – between 2 and 13 weeks of gestation – a time when most women with preexisting diabetes are just entering into prenatal care, often with suboptimal glycemic control.

Thus, significant future progress in reducing fetal mortality and childhood disability in infants of diabetic mothers will depend upon effective interventions in the first trimester while embryogenesis and critical organ formation are underway.

Dr. Moore is professor emeritus of maternal-fetal medicine and chair emeritus in the department of obstetrics, gynecology, and reproductive sciences at UC San Diego Health. He reported no disclosures.

*This story was updated on Nov. 3, 2022.

Many issues surrounding pregnancy care of women with preexisting diabetes remain challenging, especially in light of the relentless increase in maternal morbidity and mortality in the United States and globally. Rising rates of death and severe morbidity in diabetic women have continued despite significant advances in insulin pharmacology and administration technology.

However, despite these advances in glucose monitoring and insulin administration, fetal mortality and childhood morbidity rates continue to climb. This is because critical fetal structural anomalies arise from developmental errors occurring in the embryonic period – between 2 and 13 weeks of gestation – a time when most women with preexisting diabetes are just entering into prenatal care, often with suboptimal glycemic control.

Thus, significant future progress in reducing fetal mortality and childhood disability in infants of diabetic mothers will depend upon effective interventions in the first trimester while embryogenesis and critical organ formation are underway.

Dr. Moore is professor emeritus of maternal-fetal medicine and chair emeritus in the department of obstetrics, gynecology, and reproductive sciences at UC San Diego Health. He reported no disclosures.

*This story was updated on Nov. 3, 2022.

Doctor, doctor, gimme the news. I got a bad case of misidentifying you

There are a lot of medical specialties out there. A lot. Everything from allergists to urologists, with something like 150 subspecialties grouped in among the larger specialties. Can you name every one? Do you know what they do?

The point is, telling a patient or anyone in the general public that you’re an ophthalmologist may not be as helpful as you might think, if a recent study is to be believed. In a survey of 204 adults, conducted at the Minnesota State Fair of all places, researchers asked volunteers to define 14 different specialties, as well as five medical seniority titles.

Minerva Studio/ThinkStock

The results were less than stellar. While more than 90% of people correctly defined what cardiologists and dermatologists do, 6 of the other 12 specialists were correctly identified by less than half of those surveyed. Nephrology was at the bottom, correctly identified by just 20% of the fair-attending public, followed by internists (21%), intensivists (29%), hospitalists (31%), pulmonologists (43%), and neonatologists at 48%. The hospitalists are particularly concerning. They’re doctors, but in hospitals. How hard is that? (Yes, it’s obviously more complicated than that, but still.)

The general public didn’t fare much better when it came to correctly lining up the order of progression from medical student to attending. Just 12% managed to place all five in the correct order of med student, intern, senior resident, fellow, then attending, with senior resident proving especially troublesome. More than 40% put senior resident at the end, compared with 27% for attending. Which does make a certain amount of sense, since it has senior in the name.

While the results speak for themselves – maybe elaborate on what the heck your fancy title actually means – it’s too bad the researchers didn’t throw in something really tricky. If two-thirds of the population can’t identify a hospitalist, just imagine how many people would misidentify an otolaryngologist.
 

Beach-to-table sand could fight obesity

People are always looking for the new weight loss solution. Whether it’s to just look good in a new pair of jeans or reduce the risk of cardiovascular disease, there are millions of diets and exercise routines out here. We’re here to tell you that the next new therapy to reduce fat comes from a very unsuspecting place: Sand.

David Stanley

Like sand from the beach and desert, sand? Well, yes and no.

The research involved engineered porous silica particles made from sand that are designed to have a high surface area. Investigators used a two-step GI model in which gastric digestion was modeled for 30 minutes, followed by a 60-minute intestinal phase, to show that the porous silica particles helped prevent fat and sugar adsorption within the GI tract.

By mimicking the gastrointestinal environment during digestion of a high-fat, high-carb meal, the researchers found that the porous silica created an “anti-obesity effect” by restricting the adsorption of those fats and carbohydrates.

Okay, but how is that on the tummy? Much gentler on the stomach than a drug such as orlistat, said senior researcher Paul Joyce, PhD, of the University of South Australia, Adelaide, who noted the lack of effective therapies without side effects, such as bloating, diarrhea, and abdominal pain, that deter people from treatment.

Obesity affects over 1.9 billion people worldwide, so the researchers think this could be a breakthrough. Reducing obesity may be one of the most preventable ways to reduce the risk of type 2 diabetes, heart disease, and other weight-related chronic conditions. A treatment solution this simple could be the answer to this global health crisis.

Who would have thought the solution would be as simple as sand? But how would the sand get in our stomachs? Do we sprinkle it on our food? Mix it in during cooking? Or will the sand come in pill form? We sure hope it’s that third one.
 

I am Reliebo. I am here to help you

Halloween is almost here, and the LOTME staff has been trying to make the office look as scary as possible: Headless vampires, ghost clowns, Ted Cruz, gray tombstones, pink hearts, green clovers, red balloons. Wait a second, those last three are Lucky Charms marshmallows, aren’t they? We’ll use those some other time.

University of Tsukuba

What are we not using to decorate? Well, besides marshmallows from cereal, we’re not using Reliebo. That’s what we’re not using. Reliebo is a cute little fuzzy robot, and is not at all scary. Reliebo was designed to be the opposite of scary. Reliebo “may reduce fear as well as alleviate the perception of pain during medical treatments, including vaccinations,” senior author Fumihide Tanaka, PhD, of the University of Tsukuba (Japan) said in a written statement.

The soft, fur-covered robot contains small airbags that can inflate in response to hand movements. When study participants were subjected to a moderate heat stimulus on one arm, those who held the robot with the other arm experienced less pain than those who did not have a Reliebo.

The results also were encouraging when Dr. Tanaka and associates measured the levels of oxytocin and cortisol (biomarkers for stress) from the subjects’ saliva samples and evaluated their fear of injections and their psychological state before and after the experiments.

After looking at that photo of Reliebo for a while, though, we have to admit that we’re having a bit of a rethink about its cuteness. Is it cute, or weird-looking? An office full of fuzzy little inflating robots just could be seriously creepy. Please don’t tell the rest of the staff about this. We want to surprise them on Monday.

Doctor, doctor, gimme the news. I got a bad case of misidentifying you

There are a lot of medical specialties out there. A lot. Everything from allergists to urologists, with something like 150 subspecialties grouped in among the larger specialties. Can you name every one? Do you know what they do?

The point is, telling a patient or anyone in the general public that you’re an ophthalmologist may not be as helpful as you might think, if a recent study is to be believed. In a survey of 204 adults, conducted at the Minnesota State Fair of all places, researchers asked volunteers to define 14 different specialties, as well as five medical seniority titles.

Minerva Studio/ThinkStock

The results were less than stellar. While more than 90% of people correctly defined what cardiologists and dermatologists do, 6 of the other 12 specialists were correctly identified by less than half of those surveyed. Nephrology was at the bottom, correctly identified by just 20% of the fair-attending public, followed by internists (21%), intensivists (29%), hospitalists (31%), pulmonologists (43%), and neonatologists at 48%. The hospitalists are particularly concerning. They’re doctors, but in hospitals. How hard is that? (Yes, it’s obviously more complicated than that, but still.)

The general public didn’t fare much better when it came to correctly lining up the order of progression from medical student to attending. Just 12% managed to place all five in the correct order of med student, intern, senior resident, fellow, then attending, with senior resident proving especially troublesome. More than 40% put senior resident at the end, compared with 27% for attending. Which does make a certain amount of sense, since it has senior in the name.

While the results speak for themselves – maybe elaborate on what the heck your fancy title actually means – it’s too bad the researchers didn’t throw in something really tricky. If two-thirds of the population can’t identify a hospitalist, just imagine how many people would misidentify an otolaryngologist.
 

Beach-to-table sand could fight obesity

People are always looking for the new weight loss solution. Whether it’s to just look good in a new pair of jeans or reduce the risk of cardiovascular disease, there are millions of diets and exercise routines out here. We’re here to tell you that the next new therapy to reduce fat comes from a very unsuspecting place: Sand.

David Stanley

Like sand from the beach and desert, sand? Well, yes and no.

The research involved engineered porous silica particles made from sand that are designed to have a high surface area. Investigators used a two-step GI model in which gastric digestion was modeled for 30 minutes, followed by a 60-minute intestinal phase, to show that the porous silica particles helped prevent fat and sugar adsorption within the GI tract.

By mimicking the gastrointestinal environment during digestion of a high-fat, high-carb meal, the researchers found that the porous silica created an “anti-obesity effect” by restricting the adsorption of those fats and carbohydrates.

Okay, but how is that on the tummy? Much gentler on the stomach than a drug such as orlistat, said senior researcher Paul Joyce, PhD, of the University of South Australia, Adelaide, who noted the lack of effective therapies without side effects, such as bloating, diarrhea, and abdominal pain, that deter people from treatment.

Obesity affects over 1.9 billion people worldwide, so the researchers think this could be a breakthrough. Reducing obesity may be one of the most preventable ways to reduce the risk of type 2 diabetes, heart disease, and other weight-related chronic conditions. A treatment solution this simple could be the answer to this global health crisis.

Who would have thought the solution would be as simple as sand? But how would the sand get in our stomachs? Do we sprinkle it on our food? Mix it in during cooking? Or will the sand come in pill form? We sure hope it’s that third one.
 

I am Reliebo. I am here to help you

Halloween is almost here, and the LOTME staff has been trying to make the office look as scary as possible: Headless vampires, ghost clowns, Ted Cruz, gray tombstones, pink hearts, green clovers, red balloons. Wait a second, those last three are Lucky Charms marshmallows, aren’t they? We’ll use those some other time.

University of Tsukuba

What are we not using to decorate? Well, besides marshmallows from cereal, we’re not using Reliebo. That’s what we’re not using. Reliebo is a cute little fuzzy robot, and is not at all scary. Reliebo was designed to be the opposite of scary. Reliebo “may reduce fear as well as alleviate the perception of pain during medical treatments, including vaccinations,” senior author Fumihide Tanaka, PhD, of the University of Tsukuba (Japan) said in a written statement.

The soft, fur-covered robot contains small airbags that can inflate in response to hand movements. When study participants were subjected to a moderate heat stimulus on one arm, those who held the robot with the other arm experienced less pain than those who did not have a Reliebo.

The results also were encouraging when Dr. Tanaka and associates measured the levels of oxytocin and cortisol (biomarkers for stress) from the subjects’ saliva samples and evaluated their fear of injections and their psychological state before and after the experiments.

After looking at that photo of Reliebo for a while, though, we have to admit that we’re having a bit of a rethink about its cuteness. Is it cute, or weird-looking? An office full of fuzzy little inflating robots just could be seriously creepy. Please don’t tell the rest of the staff about this. We want to surprise them on Monday.

Doctor, doctor, gimme the news. I got a bad case of misidentifying you

There are a lot of medical specialties out there. A lot. Everything from allergists to urologists, with something like 150 subspecialties grouped in among the larger specialties. Can you name every one? Do you know what they do?

The point is, telling a patient or anyone in the general public that you’re an ophthalmologist may not be as helpful as you might think, if a recent study is to be believed. In a survey of 204 adults, conducted at the Minnesota State Fair of all places, researchers asked volunteers to define 14 different specialties, as well as five medical seniority titles.

Minerva Studio/ThinkStock

The results were less than stellar. While more than 90% of people correctly defined what cardiologists and dermatologists do, 6 of the other 12 specialists were correctly identified by less than half of those surveyed. Nephrology was at the bottom, correctly identified by just 20% of the fair-attending public, followed by internists (21%), intensivists (29%), hospitalists (31%), pulmonologists (43%), and neonatologists at 48%. The hospitalists are particularly concerning. They’re doctors, but in hospitals. How hard is that? (Yes, it’s obviously more complicated than that, but still.)

The general public didn’t fare much better when it came to correctly lining up the order of progression from medical student to attending. Just 12% managed to place all five in the correct order of med student, intern, senior resident, fellow, then attending, with senior resident proving especially troublesome. More than 40% put senior resident at the end, compared with 27% for attending. Which does make a certain amount of sense, since it has senior in the name.

While the results speak for themselves – maybe elaborate on what the heck your fancy title actually means – it’s too bad the researchers didn’t throw in something really tricky. If two-thirds of the population can’t identify a hospitalist, just imagine how many people would misidentify an otolaryngologist.
 

Beach-to-table sand could fight obesity

People are always looking for the new weight loss solution. Whether it’s to just look good in a new pair of jeans or reduce the risk of cardiovascular disease, there are millions of diets and exercise routines out here. We’re here to tell you that the next new therapy to reduce fat comes from a very unsuspecting place: Sand.

David Stanley

Like sand from the beach and desert, sand? Well, yes and no.

The research involved engineered porous silica particles made from sand that are designed to have a high surface area. Investigators used a two-step GI model in which gastric digestion was modeled for 30 minutes, followed by a 60-minute intestinal phase, to show that the porous silica particles helped prevent fat and sugar adsorption within the GI tract.

By mimicking the gastrointestinal environment during digestion of a high-fat, high-carb meal, the researchers found that the porous silica created an “anti-obesity effect” by restricting the adsorption of those fats and carbohydrates.

Okay, but how is that on the tummy? Much gentler on the stomach than a drug such as orlistat, said senior researcher Paul Joyce, PhD, of the University of South Australia, Adelaide, who noted the lack of effective therapies without side effects, such as bloating, diarrhea, and abdominal pain, that deter people from treatment.

Obesity affects over 1.9 billion people worldwide, so the researchers think this could be a breakthrough. Reducing obesity may be one of the most preventable ways to reduce the risk of type 2 diabetes, heart disease, and other weight-related chronic conditions. A treatment solution this simple could be the answer to this global health crisis.

Who would have thought the solution would be as simple as sand? But how would the sand get in our stomachs? Do we sprinkle it on our food? Mix it in during cooking? Or will the sand come in pill form? We sure hope it’s that third one.
 

I am Reliebo. I am here to help you

Halloween is almost here, and the LOTME staff has been trying to make the office look as scary as possible: Headless vampires, ghost clowns, Ted Cruz, gray tombstones, pink hearts, green clovers, red balloons. Wait a second, those last three are Lucky Charms marshmallows, aren’t they? We’ll use those some other time.

University of Tsukuba

What are we not using to decorate? Well, besides marshmallows from cereal, we’re not using Reliebo. That’s what we’re not using. Reliebo is a cute little fuzzy robot, and is not at all scary. Reliebo was designed to be the opposite of scary. Reliebo “may reduce fear as well as alleviate the perception of pain during medical treatments, including vaccinations,” senior author Fumihide Tanaka, PhD, of the University of Tsukuba (Japan) said in a written statement.

The soft, fur-covered robot contains small airbags that can inflate in response to hand movements. When study participants were subjected to a moderate heat stimulus on one arm, those who held the robot with the other arm experienced less pain than those who did not have a Reliebo.

The results also were encouraging when Dr. Tanaka and associates measured the levels of oxytocin and cortisol (biomarkers for stress) from the subjects’ saliva samples and evaluated their fear of injections and their psychological state before and after the experiments.

After looking at that photo of Reliebo for a while, though, we have to admit that we’re having a bit of a rethink about its cuteness. Is it cute, or weird-looking? An office full of fuzzy little inflating robots just could be seriously creepy. Please don’t tell the rest of the staff about this. We want to surprise them on Monday.

How exquisitely designed is the human body? Despite our efforts to occasionally derail our health and well-being, our bodies come with helpful built-in protective functional barriers. The blood-brain barrier and the placenta are two examples. In basic terms, both restrict the free flow of substances from the systemic circulation and help prevent harmful substances from reaching the brain and the fetus, respectively. The placenta is unique in that it develops along with the fetus and, at delivery, is expelled after having done its work. But what happens when a disease or treatment alters the ability of the placenta to operate as a control gate for the fetus?

In keeping with this column’s title, let’s start with bugs. Based on the 2021 World Malaria Report, malaria continues to strike hardest against pregnant women and children in Africa.¹ In 2020 in 33 moderate- and high-transmission African countries, 34% of pregnancies (11.6 million of 33.8 million) were exposed to malaria infection. Malaria infection during pregnancy is associated with adverse birth outcomes, including small for gestational age and preterm birth, which in turn increase the risk for neonatal and childhood mortality.

Malaria is caused by the parasite of the genus Plasmodium and is transmitted by infective female Anopheles mosquitoes. The predominant parasite in sub-Saharan Africa is Plasmodium falciparum. Pregnant women are particularly vulnerable. Once a subject is bitten, the P. falciparum parasite is injected into the human blood stream where it is taken up initially by the liver and subsequently by the erythrocytes of the host which adhere to placental receptors, triggering placental inflammation and subsequent damage. This leads to impaired placental development and function, placental insufficiency, and the adverse birth outcomes identified above.² In targeting the placenta, this parasite can cause structural and functional placental alterations through infection and inflammation. A recent review by McColl et al. has shown that placental inflammation with or without infection affects the normal function of placental amino acid transporters, leading to similar adverse pregnancy outcomes.³

Moving on to drugs and drug safety in pregnancy, concern generally focuses on exposure during pregnancy that might directly affect the fetus at critical time windows during growth and development. There is a need to understand not only the size of the drug molecules and the degree to which they cross the placenta, but also how those medications may affect the development and function of the placenta itself. New research methods such as the “placenta-on-a-chip” that models the transport of nutrients and drugs allow direct evaluation of placental function.⁴ Assessing placental function using such tools during drug development will contribute to a better understanding of the safety and efficacy of new medications for use in pregnancy, providing important information at the preclinical phases.⁵

The placenta is a dynamic organ with metabolic, endocrine, immunologic, and transport functions. Most importantly, it protects a healthy pregnancy. It also provides the advantage of immunologic protection to the fetus when maternal antibodies cross the placenta and provide initial protection until the newborn’s own immune system matures. Using our knowledge of placental alteration models and new research methods such as “placenta-on-a-chip” can help expand our understanding of the role of the placenta in medication safety in pregnancy.

Dr. Hardy is executive director, head of pharmacoepidemiology, at Biohaven Pharmaceuticals. She serves as a member of Council for the Society for Birth Defects Research and Prevention, represents the BDRP on the Coalition to Advance Maternal Therapeutics, and is a member of the North American Board for Amandla Development, South Africa. Dr. Tassinari is a consultant and was formerly employed by Pfizer and the Food and Drug Administration. Dr. Tassinari is a past president of BDRP (formerly the Teratology Society) and currently serves as a member of the External Science Advisory Committee for The Medicines for Malaria Venture and is a member of the Science Advisory Committee for the COVID-19 Vaccines International Pregnancy Exposure Registry.

References

1. World malaria report 2021. Geneva: World Health Organization; 2021.

2. Chua CLL et al. Front Immunol. 2021;12:621382.

3. McColl ER et al. Drug Metab Dispos. May 2022.

4. Blundeli C et al. Adv Healthc Mater. 2018. January;7(2).

5. David AL et al. Ther Innov Regul Sci. 2022.

How exquisitely designed is the human body? Despite our efforts to occasionally derail our health and well-being, our bodies come with helpful built-in protective functional barriers. The blood-brain barrier and the placenta are two examples. In basic terms, both restrict the free flow of substances from the systemic circulation and help prevent harmful substances from reaching the brain and the fetus, respectively. The placenta is unique in that it develops along with the fetus and, at delivery, is expelled after having done its work. But what happens when a disease or treatment alters the ability of the placenta to operate as a control gate for the fetus?

In keeping with this column’s title, let’s start with bugs. Based on the 2021 World Malaria Report, malaria continues to strike hardest against pregnant women and children in Africa.¹ In 2020 in 33 moderate- and high-transmission African countries, 34% of pregnancies (11.6 million of 33.8 million) were exposed to malaria infection. Malaria infection during pregnancy is associated with adverse birth outcomes, including small for gestational age and preterm birth, which in turn increase the risk for neonatal and childhood mortality.

Malaria is caused by the parasite of the genus Plasmodium and is transmitted by infective female Anopheles mosquitoes. The predominant parasite in sub-Saharan Africa is Plasmodium falciparum. Pregnant women are particularly vulnerable. Once a subject is bitten, the P. falciparum parasite is injected into the human blood stream where it is taken up initially by the liver and subsequently by the erythrocytes of the host which adhere to placental receptors, triggering placental inflammation and subsequent damage. This leads to impaired placental development and function, placental insufficiency, and the adverse birth outcomes identified above.² In targeting the placenta, this parasite can cause structural and functional placental alterations through infection and inflammation. A recent review by McColl et al. has shown that placental inflammation with or without infection affects the normal function of placental amino acid transporters, leading to similar adverse pregnancy outcomes.³

Moving on to drugs and drug safety in pregnancy, concern generally focuses on exposure during pregnancy that might directly affect the fetus at critical time windows during growth and development. There is a need to understand not only the size of the drug molecules and the degree to which they cross the placenta, but also how those medications may affect the development and function of the placenta itself. New research methods such as the “placenta-on-a-chip” that models the transport of nutrients and drugs allow direct evaluation of placental function.⁴ Assessing placental function using such tools during drug development will contribute to a better understanding of the safety and efficacy of new medications for use in pregnancy, providing important information at the preclinical phases.⁵

The placenta is a dynamic organ with metabolic, endocrine, immunologic, and transport functions. Most importantly, it protects a healthy pregnancy. It also provides the advantage of immunologic protection to the fetus when maternal antibodies cross the placenta and provide initial protection until the newborn’s own immune system matures. Using our knowledge of placental alteration models and new research methods such as “placenta-on-a-chip” can help expand our understanding of the role of the placenta in medication safety in pregnancy.

Dr. Hardy is executive director, head of pharmacoepidemiology, at Biohaven Pharmaceuticals. She serves as a member of Council for the Society for Birth Defects Research and Prevention, represents the BDRP on the Coalition to Advance Maternal Therapeutics, and is a member of the North American Board for Amandla Development, South Africa. Dr. Tassinari is a consultant and was formerly employed by Pfizer and the Food and Drug Administration. Dr. Tassinari is a past president of BDRP (formerly the Teratology Society) and currently serves as a member of the External Science Advisory Committee for The Medicines for Malaria Venture and is a member of the Science Advisory Committee for the COVID-19 Vaccines International Pregnancy Exposure Registry.

References

1. World malaria report 2021. Geneva: World Health Organization; 2021.

2. Chua CLL et al. Front Immunol. 2021;12:621382.

3. McColl ER et al. Drug Metab Dispos. May 2022.

4. Blundeli C et al. Adv Healthc Mater. 2018. January;7(2).

5. David AL et al. Ther Innov Regul Sci. 2022.

How exquisitely designed is the human body? Despite our efforts to occasionally derail our health and well-being, our bodies come with helpful built-in protective functional barriers. The blood-brain barrier and the placenta are two examples. In basic terms, both restrict the free flow of substances from the systemic circulation and help prevent harmful substances from reaching the brain and the fetus, respectively. The placenta is unique in that it develops along with the fetus and, at delivery, is expelled after having done its work. But what happens when a disease or treatment alters the ability of the placenta to operate as a control gate for the fetus?

In keeping with this column’s title, let’s start with bugs. Based on the 2021 World Malaria Report, malaria continues to strike hardest against pregnant women and children in Africa.¹ In 2020 in 33 moderate- and high-transmission African countries, 34% of pregnancies (11.6 million of 33.8 million) were exposed to malaria infection. Malaria infection during pregnancy is associated with adverse birth outcomes, including small for gestational age and preterm birth, which in turn increase the risk for neonatal and childhood mortality.

Malaria is caused by the parasite of the genus Plasmodium and is transmitted by infective female Anopheles mosquitoes. The predominant parasite in sub-Saharan Africa is Plasmodium falciparum. Pregnant women are particularly vulnerable. Once a subject is bitten, the P. falciparum parasite is injected into the human blood stream where it is taken up initially by the liver and subsequently by the erythrocytes of the host which adhere to placental receptors, triggering placental inflammation and subsequent damage. This leads to impaired placental development and function, placental insufficiency, and the adverse birth outcomes identified above.² In targeting the placenta, this parasite can cause structural and functional placental alterations through infection and inflammation. A recent review by McColl et al. has shown that placental inflammation with or without infection affects the normal function of placental amino acid transporters, leading to similar adverse pregnancy outcomes.³

Moving on to drugs and drug safety in pregnancy, concern generally focuses on exposure during pregnancy that might directly affect the fetus at critical time windows during growth and development. There is a need to understand not only the size of the drug molecules and the degree to which they cross the placenta, but also how those medications may affect the development and function of the placenta itself. New research methods such as the “placenta-on-a-chip” that models the transport of nutrients and drugs allow direct evaluation of placental function.⁴ Assessing placental function using such tools during drug development will contribute to a better understanding of the safety and efficacy of new medications for use in pregnancy, providing important information at the preclinical phases.⁵

The placenta is a dynamic organ with metabolic, endocrine, immunologic, and transport functions. Most importantly, it protects a healthy pregnancy. It also provides the advantage of immunologic protection to the fetus when maternal antibodies cross the placenta and provide initial protection until the newborn’s own immune system matures. Using our knowledge of placental alteration models and new research methods such as “placenta-on-a-chip” can help expand our understanding of the role of the placenta in medication safety in pregnancy.

Dr. Hardy is executive director, head of pharmacoepidemiology, at Biohaven Pharmaceuticals. She serves as a member of Council for the Society for Birth Defects Research and Prevention, represents the BDRP on the Coalition to Advance Maternal Therapeutics, and is a member of the North American Board for Amandla Development, South Africa. Dr. Tassinari is a consultant and was formerly employed by Pfizer and the Food and Drug Administration. Dr. Tassinari is a past president of BDRP (formerly the Teratology Society) and currently serves as a member of the External Science Advisory Committee for The Medicines for Malaria Venture and is a member of the Science Advisory Committee for the COVID-19 Vaccines International Pregnancy Exposure Registry.

References

1. World malaria report 2021. Geneva: World Health Organization; 2021.

2. Chua CLL et al. Front Immunol. 2021;12:621382.

3. McColl ER et al. Drug Metab Dispos. May 2022.

4. Blundeli C et al. Adv Healthc Mater. 2018. January;7(2).

5. David AL et al. Ther Innov Regul Sci. 2022.

New efficacy and safety data from the monarchE study show that chemotherapy administered before treatment with abemaciclib and estrogen therapy, led to a clinically meaningful improvement in invasive disease-free survival and distant relapse-free survival for women with HR-positive, ERBB2-negative, node-positive, early breast cancer at high risk of recurrence.

The study was published earlier this year in JAMA Oncology.

Neoadjuvant chemotherapy is often provided to such patients in hopes of achieving breast-conserving surgery. Although pathologic complete response rates can be higher than 50% after chemotherapy treatment in triple-negative and ERBB2-positive breast cancer, most patients with HR-positive and ERBB2-negative breast cancer have residual tumor at surgery after neoadjuvant chemotherapy, which is associated with an increased risk of recurrence.

Adjuvant estrogen therapy can reduce the risk of recurrence in this population, but a significant hazard remains.

“To our knowledge, abemaciclib is the first agent added to standard adjuvant estrogen therapy that has been shown to reduce the risk of recurrence in patients with HR-positive, ERBB2-negative early breast cancer with residual disease after neoadjuvant chemotherapy,” wrote the authors, who were led by Miguel Martin, MD, PhD, Hospital General Universitario Gregorio Marañon, Spain.

In 2021, Food and Drug Administration approved abemaciclib (Verzenio, Lilly) with endocrine therapy for the treatment of HR-positive/ERBB2-negative, node-positive, high-risk early breast cancer. Their decision was based on data from the monarchE study.

The study is at odds with the previously published Penelope-B study, which found no benefit from treatment with the CDK4/6 inhibitor palbociclib (Ibrance, Pfizer) after 42.8 months of follow-up. The authors suggest that the disparate outcomes may be due to pharmacological differences between the two drugs as well as different dosing schedules: In monarchE, patients received abemaciclib on a continuous basis, while patients in Penelope-B received palbociclib for 21 days, followed by 7 days off. The treatment duration was 2 years in monarchE and 1 year in Penelope-B. Abemaciclib can be dosed continuously because it is a stronger inhibitor of CDK4 versus CDK6 compared to abemaciclib, and in vitro studies suggest that continuous dosing could be a key factor in creating profound inhibition of DNA synthesis.

The monarchE study included 5,637 patients who were randomized to receive standard of care estrogen therapy for 5 years with or without abemaciclib (150 mg, twice per day) for 2 years; 36.5% received abemaciclib. The mean age was 49.9 years; 70.8% were White, 22.8% Asian, and 2.7% Black.

The abemaciclib group had a clinically and statistically significant benefit in invasive disease-free survival (IDFS) (hazard ratio, 0.61; nominal P < .001) and distant relapse-free survival (DRFS) (HR, 0.61; nominal P < .001). At 2 years, DRFS was 89.5% in the abemaciclib group and 82.8% in the estrogen therapy–only group. IDFS was 87.2% and 80.6%, respectively. Patients who underwent neoadjuvant chemotherapy had a similar safety profile to the estrogen therapy–only group, although there was a higher incidence of treatment-emergent adverse events. The most common were diarrhea, infections, neutropenia, and fatigue. The most frequent grade treatment-emergent adverse events (of at least 3) were neutropenia and leucopenia.

The researchers noted that patients who underwent neoadjuvant chemotherapy had a worse prognosis than the intent-to-treat arm, as evidenced by a higher risk of 2-year recurrence (19% versus 11%). Exploratory subgroup analyses revealed that treatment with abemaciclib and estrogen therapy conferred IDFS and DRFS benefits regardless of the pathological tumor size and number of positive axillary lymph nodes.

The study was limited by the fact that it was open label, and the subgroup analyses were not powered to find statistically significant associations.

Dr. Martin has received grants from Eli Lilly, which funded monarchE.

New efficacy and safety data from the monarchE study show that chemotherapy administered before treatment with abemaciclib and estrogen therapy, led to a clinically meaningful improvement in invasive disease-free survival and distant relapse-free survival for women with HR-positive, ERBB2-negative, node-positive, early breast cancer at high risk of recurrence.

The study was published earlier this year in JAMA Oncology.

Neoadjuvant chemotherapy is often provided to such patients in hopes of achieving breast-conserving surgery. Although pathologic complete response rates can be higher than 50% after chemotherapy treatment in triple-negative and ERBB2-positive breast cancer, most patients with HR-positive and ERBB2-negative breast cancer have residual tumor at surgery after neoadjuvant chemotherapy, which is associated with an increased risk of recurrence.

Adjuvant estrogen therapy can reduce the risk of recurrence in this population, but a significant hazard remains.

“To our knowledge, abemaciclib is the first agent added to standard adjuvant estrogen therapy that has been shown to reduce the risk of recurrence in patients with HR-positive, ERBB2-negative early breast cancer with residual disease after neoadjuvant chemotherapy,” wrote the authors, who were led by Miguel Martin, MD, PhD, Hospital General Universitario Gregorio Marañon, Spain.

In 2021, Food and Drug Administration approved abemaciclib (Verzenio, Lilly) with endocrine therapy for the treatment of HR-positive/ERBB2-negative, node-positive, high-risk early breast cancer. Their decision was based on data from the monarchE study.

The study is at odds with the previously published Penelope-B study, which found no benefit from treatment with the CDK4/6 inhibitor palbociclib (Ibrance, Pfizer) after 42.8 months of follow-up. The authors suggest that the disparate outcomes may be due to pharmacological differences between the two drugs as well as different dosing schedules: In monarchE, patients received abemaciclib on a continuous basis, while patients in Penelope-B received palbociclib for 21 days, followed by 7 days off. The treatment duration was 2 years in monarchE and 1 year in Penelope-B. Abemaciclib can be dosed continuously because it is a stronger inhibitor of CDK4 versus CDK6 compared to abemaciclib, and in vitro studies suggest that continuous dosing could be a key factor in creating profound inhibition of DNA synthesis.

The monarchE study included 5,637 patients who were randomized to receive standard of care estrogen therapy for 5 years with or without abemaciclib (150 mg, twice per day) for 2 years; 36.5% received abemaciclib. The mean age was 49.9 years; 70.8% were White, 22.8% Asian, and 2.7% Black.

The abemaciclib group had a clinically and statistically significant benefit in invasive disease-free survival (IDFS) (hazard ratio, 0.61; nominal P < .001) and distant relapse-free survival (DRFS) (HR, 0.61; nominal P < .001). At 2 years, DRFS was 89.5% in the abemaciclib group and 82.8% in the estrogen therapy–only group. IDFS was 87.2% and 80.6%, respectively. Patients who underwent neoadjuvant chemotherapy had a similar safety profile to the estrogen therapy–only group, although there was a higher incidence of treatment-emergent adverse events. The most common were diarrhea, infections, neutropenia, and fatigue. The most frequent grade treatment-emergent adverse events (of at least 3) were neutropenia and leucopenia.

The researchers noted that patients who underwent neoadjuvant chemotherapy had a worse prognosis than the intent-to-treat arm, as evidenced by a higher risk of 2-year recurrence (19% versus 11%). Exploratory subgroup analyses revealed that treatment with abemaciclib and estrogen therapy conferred IDFS and DRFS benefits regardless of the pathological tumor size and number of positive axillary lymph nodes.

The study was limited by the fact that it was open label, and the subgroup analyses were not powered to find statistically significant associations.

Dr. Martin has received grants from Eli Lilly, which funded monarchE.

New efficacy and safety data from the monarchE study show that chemotherapy administered before treatment with abemaciclib and estrogen therapy, led to a clinically meaningful improvement in invasive disease-free survival and distant relapse-free survival for women with HR-positive, ERBB2-negative, node-positive, early breast cancer at high risk of recurrence.

The study was published earlier this year in JAMA Oncology.

Neoadjuvant chemotherapy is often provided to such patients in hopes of achieving breast-conserving surgery. Although pathologic complete response rates can be higher than 50% after chemotherapy treatment in triple-negative and ERBB2-positive breast cancer, most patients with HR-positive and ERBB2-negative breast cancer have residual tumor at surgery after neoadjuvant chemotherapy, which is associated with an increased risk of recurrence.

Adjuvant estrogen therapy can reduce the risk of recurrence in this population, but a significant hazard remains.

“To our knowledge, abemaciclib is the first agent added to standard adjuvant estrogen therapy that has been shown to reduce the risk of recurrence in patients with HR-positive, ERBB2-negative early breast cancer with residual disease after neoadjuvant chemotherapy,” wrote the authors, who were led by Miguel Martin, MD, PhD, Hospital General Universitario Gregorio Marañon, Spain.

In 2021, Food and Drug Administration approved abemaciclib (Verzenio, Lilly) with endocrine therapy for the treatment of HR-positive/ERBB2-negative, node-positive, high-risk early breast cancer. Their decision was based on data from the monarchE study.

The study is at odds with the previously published Penelope-B study, which found no benefit from treatment with the CDK4/6 inhibitor palbociclib (Ibrance, Pfizer) after 42.8 months of follow-up. The authors suggest that the disparate outcomes may be due to pharmacological differences between the two drugs as well as different dosing schedules: In monarchE, patients received abemaciclib on a continuous basis, while patients in Penelope-B received palbociclib for 21 days, followed by 7 days off. The treatment duration was 2 years in monarchE and 1 year in Penelope-B. Abemaciclib can be dosed continuously because it is a stronger inhibitor of CDK4 versus CDK6 compared to abemaciclib, and in vitro studies suggest that continuous dosing could be a key factor in creating profound inhibition of DNA synthesis.

The monarchE study included 5,637 patients who were randomized to receive standard of care estrogen therapy for 5 years with or without abemaciclib (150 mg, twice per day) for 2 years; 36.5% received abemaciclib. The mean age was 49.9 years; 70.8% were White, 22.8% Asian, and 2.7% Black.

The abemaciclib group had a clinically and statistically significant benefit in invasive disease-free survival (IDFS) (hazard ratio, 0.61; nominal P < .001) and distant relapse-free survival (DRFS) (HR, 0.61; nominal P < .001). At 2 years, DRFS was 89.5% in the abemaciclib group and 82.8% in the estrogen therapy–only group. IDFS was 87.2% and 80.6%, respectively. Patients who underwent neoadjuvant chemotherapy had a similar safety profile to the estrogen therapy–only group, although there was a higher incidence of treatment-emergent adverse events. The most common were diarrhea, infections, neutropenia, and fatigue. The most frequent grade treatment-emergent adverse events (of at least 3) were neutropenia and leucopenia.

The researchers noted that patients who underwent neoadjuvant chemotherapy had a worse prognosis than the intent-to-treat arm, as evidenced by a higher risk of 2-year recurrence (19% versus 11%). Exploratory subgroup analyses revealed that treatment with abemaciclib and estrogen therapy conferred IDFS and DRFS benefits regardless of the pathological tumor size and number of positive axillary lymph nodes.

The study was limited by the fact that it was open label, and the subgroup analyses were not powered to find statistically significant associations.

Dr. Martin has received grants from Eli Lilly, which funded monarchE.

Vitamin D deficiency increases mortality risk and raising levels even slightly could decrease the risk, researchers examining data from the UK Biobank have found.

They used a Mendelian randomization approach, which uses genetic variants as “proxy indicators” for external factors that affect vitamin D levels, such as sun exposure or dietary intake. It allows for analysis of the relationship between deficiency and outcomes including mortality, which can’t be done in randomized clinical trials for ethical reasons.

Using this method, nutritionist Joshua P. Sutherland, PhD, of the Australian Centre for Precision Health, Adelaide, and colleagues found an association between genetically predicted vitamin D levels [25-(OH)D] and mortality from several major causes, with evidence of causality among people with measured concentrations below, but not above, 50 nmol/L. The findings were published online in Annals of Internal Medicine.

Genetic approach reveals causal relationship

The investigators analyzed data from 307,601 individuals in the UK Biobank, a prospective cohort of people recruited from England, Scotland, and Wales during March 2006 and July 2010. Most were of White European ancestry and were aged 37-73 years at baseline.

Genetically predicted vitamin D levels were estimated using 35 confirmed 25-(OH)D variants. Participants were followed for outcomes up to June 2020.

The average baseline measured 25-(OH)D concentration was 45.2 nmol/L, and 11.7% (n = 36,009) of participants had levels between 10.0  and 24.9 nmol/L. Higher levels were seen in people living in southern areas and nonsmokers as well as those with a higher level of physical activity, less socioeconomic deprivation, and lower body mass index.

During follow-up, 6.1% of participants died (n = 18,700). After adjustment for variables, odds ratios for all causes of mortality were highest among people with 25-(OH)D levels below 25 nmol/L and appeared to plateau between 50 and 75 nmol/L, with no further reduction in mortality at values of 75-125 nmol/L.
 

Mortality 36% higher in those deficient in vitamin D

The risk for mortality was a significant 36% higher for participants with 25-(OH)D 25 nmol/L compared with 50 nmol/L.

With the Mendelian randomization, there was an L-shaped association between genetically predicted 25-(OH)D level and all-cause mortality (P for nonlinearity < .001) and for mortality because of cancer and cardiovascular disease (P for nonlinearity ≤ .033).

Again, the strongest association with those outcomes and genetically predicted 25-(OH)D was found at levels below 25 nmol/L and a plateau was seen by 50 nmol/L.

Compared with a measured 25-(OH)D concentration of 50 nmol/L, investigators estimated that the genetically predicted odds of all-cause mortality would increase sixfold (odds ratio, 6.00) for participants at 10 nmol/L and by 25% (OR, 1.25) for those at 25 nmol/L.

And, compared with a measured 25-(OH)D concentration of 50 nmol/L, those with 10 nmol/L had genetically predicted odds ratios of 5.98 for cardiovascular mortality, 3.37 for cancer mortality, and 12.44 for respiratory mortality.

Comparing measured 25-(OH)D concentrations of 25 nmol/L versus 50 nmol/L, odds ratios for those outcomes were 1.25, 1.16, and 1.96 (95% confidence interval, 1.88-4.67), respectively. All were statistically significant.

Consistent results supportive of a causal effect of genetically predicted 25-(OH)D on all-cause mortality in those with low measured vitamin D concentrations were also found in a sensitivity analysis of 20,837 people of non-White ethnic origin.

The study was funded by the Australian National Health and Medical Research Council. Dr. Sutherland’s studentship is funded by an Australian Research Training Program Scholarship.

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

Vitamin D deficiency increases mortality risk and raising levels even slightly could decrease the risk, researchers examining data from the UK Biobank have found.

They used a Mendelian randomization approach, which uses genetic variants as “proxy indicators” for external factors that affect vitamin D levels, such as sun exposure or dietary intake. It allows for analysis of the relationship between deficiency and outcomes including mortality, which can’t be done in randomized clinical trials for ethical reasons.

Using this method, nutritionist Joshua P. Sutherland, PhD, of the Australian Centre for Precision Health, Adelaide, and colleagues found an association between genetically predicted vitamin D levels [25-(OH)D] and mortality from several major causes, with evidence of causality among people with measured concentrations below, but not above, 50 nmol/L. The findings were published online in Annals of Internal Medicine.

Genetic approach reveals causal relationship

The investigators analyzed data from 307,601 individuals in the UK Biobank, a prospective cohort of people recruited from England, Scotland, and Wales during March 2006 and July 2010. Most were of White European ancestry and were aged 37-73 years at baseline.

Genetically predicted vitamin D levels were estimated using 35 confirmed 25-(OH)D variants. Participants were followed for outcomes up to June 2020.

The average baseline measured 25-(OH)D concentration was 45.2 nmol/L, and 11.7% (n = 36,009) of participants had levels between 10.0  and 24.9 nmol/L. Higher levels were seen in people living in southern areas and nonsmokers as well as those with a higher level of physical activity, less socioeconomic deprivation, and lower body mass index.

During follow-up, 6.1% of participants died (n = 18,700). After adjustment for variables, odds ratios for all causes of mortality were highest among people with 25-(OH)D levels below 25 nmol/L and appeared to plateau between 50 and 75 nmol/L, with no further reduction in mortality at values of 75-125 nmol/L.
 

Mortality 36% higher in those deficient in vitamin D

The risk for mortality was a significant 36% higher for participants with 25-(OH)D 25 nmol/L compared with 50 nmol/L.

With the Mendelian randomization, there was an L-shaped association between genetically predicted 25-(OH)D level and all-cause mortality (P for nonlinearity < .001) and for mortality because of cancer and cardiovascular disease (P for nonlinearity ≤ .033).

Again, the strongest association with those outcomes and genetically predicted 25-(OH)D was found at levels below 25 nmol/L and a plateau was seen by 50 nmol/L.

Compared with a measured 25-(OH)D concentration of 50 nmol/L, investigators estimated that the genetically predicted odds of all-cause mortality would increase sixfold (odds ratio, 6.00) for participants at 10 nmol/L and by 25% (OR, 1.25) for those at 25 nmol/L.

And, compared with a measured 25-(OH)D concentration of 50 nmol/L, those with 10 nmol/L had genetically predicted odds ratios of 5.98 for cardiovascular mortality, 3.37 for cancer mortality, and 12.44 for respiratory mortality.

Comparing measured 25-(OH)D concentrations of 25 nmol/L versus 50 nmol/L, odds ratios for those outcomes were 1.25, 1.16, and 1.96 (95% confidence interval, 1.88-4.67), respectively. All were statistically significant.

Consistent results supportive of a causal effect of genetically predicted 25-(OH)D on all-cause mortality in those with low measured vitamin D concentrations were also found in a sensitivity analysis of 20,837 people of non-White ethnic origin.

The study was funded by the Australian National Health and Medical Research Council. Dr. Sutherland’s studentship is funded by an Australian Research Training Program Scholarship.

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

Vitamin D deficiency increases mortality risk and raising levels even slightly could decrease the risk, researchers examining data from the UK Biobank have found.

They used a Mendelian randomization approach, which uses genetic variants as “proxy indicators” for external factors that affect vitamin D levels, such as sun exposure or dietary intake. It allows for analysis of the relationship between deficiency and outcomes including mortality, which can’t be done in randomized clinical trials for ethical reasons.

Using this method, nutritionist Joshua P. Sutherland, PhD, of the Australian Centre for Precision Health, Adelaide, and colleagues found an association between genetically predicted vitamin D levels [25-(OH)D] and mortality from several major causes, with evidence of causality among people with measured concentrations below, but not above, 50 nmol/L. The findings were published online in Annals of Internal Medicine.

Genetic approach reveals causal relationship

The investigators analyzed data from 307,601 individuals in the UK Biobank, a prospective cohort of people recruited from England, Scotland, and Wales during March 2006 and July 2010. Most were of White European ancestry and were aged 37-73 years at baseline.

Genetically predicted vitamin D levels were estimated using 35 confirmed 25-(OH)D variants. Participants were followed for outcomes up to June 2020.

The average baseline measured 25-(OH)D concentration was 45.2 nmol/L, and 11.7% (n = 36,009) of participants had levels between 10.0  and 24.9 nmol/L. Higher levels were seen in people living in southern areas and nonsmokers as well as those with a higher level of physical activity, less socioeconomic deprivation, and lower body mass index.

During follow-up, 6.1% of participants died (n = 18,700). After adjustment for variables, odds ratios for all causes of mortality were highest among people with 25-(OH)D levels below 25 nmol/L and appeared to plateau between 50 and 75 nmol/L, with no further reduction in mortality at values of 75-125 nmol/L.
 

Mortality 36% higher in those deficient in vitamin D

The risk for mortality was a significant 36% higher for participants with 25-(OH)D 25 nmol/L compared with 50 nmol/L.

With the Mendelian randomization, there was an L-shaped association between genetically predicted 25-(OH)D level and all-cause mortality (P for nonlinearity < .001) and for mortality because of cancer and cardiovascular disease (P for nonlinearity ≤ .033).

Again, the strongest association with those outcomes and genetically predicted 25-(OH)D was found at levels below 25 nmol/L and a plateau was seen by 50 nmol/L.

Compared with a measured 25-(OH)D concentration of 50 nmol/L, investigators estimated that the genetically predicted odds of all-cause mortality would increase sixfold (odds ratio, 6.00) for participants at 10 nmol/L and by 25% (OR, 1.25) for those at 25 nmol/L.

And, compared with a measured 25-(OH)D concentration of 50 nmol/L, those with 10 nmol/L had genetically predicted odds ratios of 5.98 for cardiovascular mortality, 3.37 for cancer mortality, and 12.44 for respiratory mortality.

Comparing measured 25-(OH)D concentrations of 25 nmol/L versus 50 nmol/L, odds ratios for those outcomes were 1.25, 1.16, and 1.96 (95% confidence interval, 1.88-4.67), respectively. All were statistically significant.

Consistent results supportive of a causal effect of genetically predicted 25-(OH)D on all-cause mortality in those with low measured vitamin D concentrations were also found in a sensitivity analysis of 20,837 people of non-White ethnic origin.

The study was funded by the Australian National Health and Medical Research Council. Dr. Sutherland’s studentship is funded by an Australian Research Training Program Scholarship.

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

The relationship between estrogen levels and heart health makes it particularly important for clinicians to be aware of those patients who might be at risk for cardiovascular disease despite not having other traditional risk factors, according to a presentation Oct. 12 at the North American Menopause Society annual meeting in Atlanta.

”Endogenous estrogens are protective for cardiovascular disease in premenopausal women,” Chrisandra L. Shufelt, MD, chair of the division of general internal medicine and associate director of the Women’s Health Research Center at Mayo Clinic in Jacksonville, Fla., told attendees. Yet, “a substantial population of young women are dying prematurely from cardiovascular disease,” with rates of cardiovascular death increasing in women aged 35-44 even as rates have decreased in postmenopausal women and in men. One potential reason may be premature estrogen loss.

Dr. Shufelt reminded attendees of four major causes of premature estrogen loss: Natural premature menopause, surgical menopause, chemotherapy-induced menopause, and premature ovarian insufficiency. But she would go on to discuss a less widely recognized condition, functional hypothalamic amenorrhea, that also may be contributing to increased cardiovascular risk.

First, Dr. Shufelt reviewed the evidence supporting the relationship between estrogen and cardiovascular health, starting with the Framingham study’s findings that cardiovascular disease is approximately two to four times more common in postmenopausal women than in premenopausal women, depending on the age range.

“Menopause at an early age, particularly under the age of 40, matters,” Dr. Shufelt said. “So we should be discussing this with our patients.”

Surgical menopause makes a difference to cardiovascular health as well, she said. In women under age 35, for example, the risk of a nonfatal heart attack in those with a bilateral oophorectomy was 7.7 times greater than in women who retained both ovaries and their uterus, and 1.5 times greater in women who had a hysterectomy without bilateral oophorectomy.

In a 2019 study, surgical premature menopause was associated with an 87% increased risk of heart disease even after researchers accounted for age, cardiovascular risk factors, and some forms of hormone therapy. The increased risk from natural premature menopause, on the other hand, was lower – a 36% increased risk of heart disease – compared with those producing endogenous hormones. Although randomized controlled trials are unavailable and unlikely to be done, the Nurses’ Health Study and the Danish Nurses Cohort Study, both observational studies, found that heart disease risk was diminished in those taking hormone therapy after surgical premature menopause.

Recommendations for premature or early menopause, from a wide range of different medical societies including NAMS, are that women without contraindications be given estrogen-based hormone therapy until the average age of natural menopause. Though not included in the same guidance, research has also shown that estrogen after oophorectomy does not increase the risk of breast cancer in women with a BRCA1 mutation, Dr. Shufelt said. Hormone therapy for premature or early menopause should adequately replace the levels women have lost and that means younger menopausal women often need higher doses than what older women receive, such as 2 mg/day of oral estradiol rather than the standard doses of 0.5 or 1 mg/day.
 

Functional hypothalamic amenorrhea and cardiovascular risk

Dr. Shufelt then discussed functional hypothalamic amenorrhea (hypogonadotropic hypogonadism), a common type of secondary amenorrhea that affects at least 1.4 million U.S. women. Diagnosis includes lack of a period for at least 3 months in someone who previously menstruated plus lab values below 50 pg/mL for estradiol, below 10 mIU/L for follicle stimulating hormone, and below 10 mIU/L for luteinizing hormone. Causes of this reversible form of infertility can include stress, overexercising, undereating, or some combination of these, plus an underlying genetic predisposition.

“After ruling out polycystic ovary syndrome, prolactinoma, and thyroid dysfunction, clinicians need to consider the diagnosis of hypothalamic amenorrhea,” Dr. Shufelt said. This condition goes beyond low estrogen levels: Women have elevated cortisol, low thyroid levels, low leptin levels, and increased ghrelin.

”This is not going away,” Dr. Shufelt said, sharing data on stress levels among U.S. adults, particularly Gen Z and millennial adults, noting that the ongoing “national mental health crisis” may be contributing to functional hypothalamic amenorrhea.

A 2020 substudy from the Nurses’ Health Study II found an increased risk of premature death in those who didn’t have a period or always had irregular periods starting as early as 14-17 years old. The increased risk of premature death rose with age in those with irregular or absent cycles – a 37% higher risk in 18- to 22-year-olds and a 39% increased risk in 29- to 46-year-olds.

But clinicians aren’t adequately identifying the “phenotype of the hypothalamic women,” Dr. Shufelt said, despite research showing overlap between hypothalamic amenorrhea and a higher risk of cardiovascular disease. Hypothalamic amenorrhea is so understudied that the last original research on the topic was in 2008, Dr. Shufelt said in an interview. ”No research except mine has been done to evaluate heart health in these young women,” she said.

Dr. Shufelt described a study she led involving 30 women with functional hypothalamic amenorrhea, 29 women with normal menstrual cycles, and 30 women who were recently menopausal and not on hormone therapy. The women with hypothalamic amenorrhea had average stress levels but their depression scores were higher than those of the other two groups.

The results showed that women with hypothalamic amenorrhea had lower estradiol and leptin levels and higher testosterone levels compared with the control group, and they had higher cortisol levels than those of both groups. Despite having similar body mass indexes as the control and menopausal groups, women with hypothalamic amenorrhea had lower blood pressure than that of the other two groups, yet they had higher cholesterol levels than those of the control group. EndoPAT^© (Itamar Medical) testing showed that they had poor vascular function.

“In fact, one-third of the women [with hypothalamic amenorrhea] entered the trial with a diagnosis of what would be considered endothelial dysfunction,” Dr. Shufelt said. “Our results demonstrated significantly higher circulating levels of serum proinflammatory cytokines in the women with hypothalamic amenorrhea compared to eumenorrheic controls.”

Dr. Shufelt’s team then tested whether giving estradiol to the women with hypothalamic amenorrhea for 12 weeks would improve their vascular health, but they saw no significant differences between the women who received estrogen and those who received placebo.

“Endothelial function is partly mediated by estrogen, and it was expected that giving back estrogen would ‘fix’ the endothelium, but that is not what happened,” Nanette Santoro, MD, professor and chair of obstetrics and gynecology at the University of Colorado at Denver, Aurora, said in interview. “The mechanisms that maintain vascular function in women are not limited to hormones,” said Dr. Santoro, who was not involved in Dr. Shufelt’s study but attended her lecture. “We need to think beyond the simple model of estrogen-good, no-estrogen-bad.”

Dr. Santoro noted how easy it is to overlook the women who may have cardiovascular risk because of hypothalamic amenorrhea.

“Because many women with functional hypothalamic amenorrhea are super athletic and do not have the typical features of people with cardiometabolic disease – such as glucose intolerance, obesity, abnormal cholesterol or triglycerides, or high blood pressure – clinicians tend to think of them as healthy and to think that simply giving back hormones will fix the problems with bone density and vascular function, but that is not enough,” Dr. Santoro said. “The cognitive-behavioral therapy model for treatment of women with functional hypothalamic amenorrhea addresses the stress-related factors that drive the disorder, and this needs to be considered the standard of care for treatment.”

Stephanie S. Faubion, MD, professor of medicine and director of Mayo Clinic’s Center for Women’s Health in Jacksonville, Fla., who was not involved in Dr. Shufelt’s presentation, also emphasized the importance of recognizing functional hypothalamic amenorrhea.

“This is an underrecognized entity to begin with, and the fact that these women appear to be at increased risk for vascular dysfunction and potentially increased risk for cardiovascular disease down the road makes it even more important for clinicians to identify them and provide interventions early on,” Dr. Faubion said in an interview. “These women need to be identified and the etiology of the amenorrhea addressed, whether it relates to overexercising, being underweight, or experiencing significant stressors that have led to the loss of menstrual cycles.”

Dr. Shufelt’s research was funded by the National Institutes of Health. She had no disclosures. Dr. Santoro is a member of the scientific advisory board for Astellas, Menogenix, Amazon Ember, and Que Oncology, and she consults for Ansh Labs. Dr. Faubion had no disclosures.

The relationship between estrogen levels and heart health makes it particularly important for clinicians to be aware of those patients who might be at risk for cardiovascular disease despite not having other traditional risk factors, according to a presentation Oct. 12 at the North American Menopause Society annual meeting in Atlanta.

”Endogenous estrogens are protective for cardiovascular disease in premenopausal women,” Chrisandra L. Shufelt, MD, chair of the division of general internal medicine and associate director of the Women’s Health Research Center at Mayo Clinic in Jacksonville, Fla., told attendees. Yet, “a substantial population of young women are dying prematurely from cardiovascular disease,” with rates of cardiovascular death increasing in women aged 35-44 even as rates have decreased in postmenopausal women and in men. One potential reason may be premature estrogen loss.

Dr. Shufelt reminded attendees of four major causes of premature estrogen loss: Natural premature menopause, surgical menopause, chemotherapy-induced menopause, and premature ovarian insufficiency. But she would go on to discuss a less widely recognized condition, functional hypothalamic amenorrhea, that also may be contributing to increased cardiovascular risk.

First, Dr. Shufelt reviewed the evidence supporting the relationship between estrogen and cardiovascular health, starting with the Framingham study’s findings that cardiovascular disease is approximately two to four times more common in postmenopausal women than in premenopausal women, depending on the age range.

“Menopause at an early age, particularly under the age of 40, matters,” Dr. Shufelt said. “So we should be discussing this with our patients.”

Surgical menopause makes a difference to cardiovascular health as well, she said. In women under age 35, for example, the risk of a nonfatal heart attack in those with a bilateral oophorectomy was 7.7 times greater than in women who retained both ovaries and their uterus, and 1.5 times greater in women who had a hysterectomy without bilateral oophorectomy.

In a 2019 study, surgical premature menopause was associated with an 87% increased risk of heart disease even after researchers accounted for age, cardiovascular risk factors, and some forms of hormone therapy. The increased risk from natural premature menopause, on the other hand, was lower – a 36% increased risk of heart disease – compared with those producing endogenous hormones. Although randomized controlled trials are unavailable and unlikely to be done, the Nurses’ Health Study and the Danish Nurses Cohort Study, both observational studies, found that heart disease risk was diminished in those taking hormone therapy after surgical premature menopause.

Recommendations for premature or early menopause, from a wide range of different medical societies including NAMS, are that women without contraindications be given estrogen-based hormone therapy until the average age of natural menopause. Though not included in the same guidance, research has also shown that estrogen after oophorectomy does not increase the risk of breast cancer in women with a BRCA1 mutation, Dr. Shufelt said. Hormone therapy for premature or early menopause should adequately replace the levels women have lost and that means younger menopausal women often need higher doses than what older women receive, such as 2 mg/day of oral estradiol rather than the standard doses of 0.5 or 1 mg/day.
 

Functional hypothalamic amenorrhea and cardiovascular risk

Dr. Shufelt then discussed functional hypothalamic amenorrhea (hypogonadotropic hypogonadism), a common type of secondary amenorrhea that affects at least 1.4 million U.S. women. Diagnosis includes lack of a period for at least 3 months in someone who previously menstruated plus lab values below 50 pg/mL for estradiol, below 10 mIU/L for follicle stimulating hormone, and below 10 mIU/L for luteinizing hormone. Causes of this reversible form of infertility can include stress, overexercising, undereating, or some combination of these, plus an underlying genetic predisposition.

“After ruling out polycystic ovary syndrome, prolactinoma, and thyroid dysfunction, clinicians need to consider the diagnosis of hypothalamic amenorrhea,” Dr. Shufelt said. This condition goes beyond low estrogen levels: Women have elevated cortisol, low thyroid levels, low leptin levels, and increased ghrelin.

”This is not going away,” Dr. Shufelt said, sharing data on stress levels among U.S. adults, particularly Gen Z and millennial adults, noting that the ongoing “national mental health crisis” may be contributing to functional hypothalamic amenorrhea.

A 2020 substudy from the Nurses’ Health Study II found an increased risk of premature death in those who didn’t have a period or always had irregular periods starting as early as 14-17 years old. The increased risk of premature death rose with age in those with irregular or absent cycles – a 37% higher risk in 18- to 22-year-olds and a 39% increased risk in 29- to 46-year-olds.

But clinicians aren’t adequately identifying the “phenotype of the hypothalamic women,” Dr. Shufelt said, despite research showing overlap between hypothalamic amenorrhea and a higher risk of cardiovascular disease. Hypothalamic amenorrhea is so understudied that the last original research on the topic was in 2008, Dr. Shufelt said in an interview. ”No research except mine has been done to evaluate heart health in these young women,” she said.

Dr. Shufelt described a study she led involving 30 women with functional hypothalamic amenorrhea, 29 women with normal menstrual cycles, and 30 women who were recently menopausal and not on hormone therapy. The women with hypothalamic amenorrhea had average stress levels but their depression scores were higher than those of the other two groups.

The results showed that women with hypothalamic amenorrhea had lower estradiol and leptin levels and higher testosterone levels compared with the control group, and they had higher cortisol levels than those of both groups. Despite having similar body mass indexes as the control and menopausal groups, women with hypothalamic amenorrhea had lower blood pressure than that of the other two groups, yet they had higher cholesterol levels than those of the control group. EndoPAT^© (Itamar Medical) testing showed that they had poor vascular function.

“In fact, one-third of the women [with hypothalamic amenorrhea] entered the trial with a diagnosis of what would be considered endothelial dysfunction,” Dr. Shufelt said. “Our results demonstrated significantly higher circulating levels of serum proinflammatory cytokines in the women with hypothalamic amenorrhea compared to eumenorrheic controls.”

Dr. Shufelt’s team then tested whether giving estradiol to the women with hypothalamic amenorrhea for 12 weeks would improve their vascular health, but they saw no significant differences between the women who received estrogen and those who received placebo.

“Endothelial function is partly mediated by estrogen, and it was expected that giving back estrogen would ‘fix’ the endothelium, but that is not what happened,” Nanette Santoro, MD, professor and chair of obstetrics and gynecology at the University of Colorado at Denver, Aurora, said in interview. “The mechanisms that maintain vascular function in women are not limited to hormones,” said Dr. Santoro, who was not involved in Dr. Shufelt’s study but attended her lecture. “We need to think beyond the simple model of estrogen-good, no-estrogen-bad.”

Dr. Santoro noted how easy it is to overlook the women who may have cardiovascular risk because of hypothalamic amenorrhea.

“Because many women with functional hypothalamic amenorrhea are super athletic and do not have the typical features of people with cardiometabolic disease – such as glucose intolerance, obesity, abnormal cholesterol or triglycerides, or high blood pressure – clinicians tend to think of them as healthy and to think that simply giving back hormones will fix the problems with bone density and vascular function, but that is not enough,” Dr. Santoro said. “The cognitive-behavioral therapy model for treatment of women with functional hypothalamic amenorrhea addresses the stress-related factors that drive the disorder, and this needs to be considered the standard of care for treatment.”

Stephanie S. Faubion, MD, professor of medicine and director of Mayo Clinic’s Center for Women’s Health in Jacksonville, Fla., who was not involved in Dr. Shufelt’s presentation, also emphasized the importance of recognizing functional hypothalamic amenorrhea.

“This is an underrecognized entity to begin with, and the fact that these women appear to be at increased risk for vascular dysfunction and potentially increased risk for cardiovascular disease down the road makes it even more important for clinicians to identify them and provide interventions early on,” Dr. Faubion said in an interview. “These women need to be identified and the etiology of the amenorrhea addressed, whether it relates to overexercising, being underweight, or experiencing significant stressors that have led to the loss of menstrual cycles.”

Dr. Shufelt’s research was funded by the National Institutes of Health. She had no disclosures. Dr. Santoro is a member of the scientific advisory board for Astellas, Menogenix, Amazon Ember, and Que Oncology, and she consults for Ansh Labs. Dr. Faubion had no disclosures.

The relationship between estrogen levels and heart health makes it particularly important for clinicians to be aware of those patients who might be at risk for cardiovascular disease despite not having other traditional risk factors, according to a presentation Oct. 12 at the North American Menopause Society annual meeting in Atlanta.

”Endogenous estrogens are protective for cardiovascular disease in premenopausal women,” Chrisandra L. Shufelt, MD, chair of the division of general internal medicine and associate director of the Women’s Health Research Center at Mayo Clinic in Jacksonville, Fla., told attendees. Yet, “a substantial population of young women are dying prematurely from cardiovascular disease,” with rates of cardiovascular death increasing in women aged 35-44 even as rates have decreased in postmenopausal women and in men. One potential reason may be premature estrogen loss.

Dr. Shufelt reminded attendees of four major causes of premature estrogen loss: Natural premature menopause, surgical menopause, chemotherapy-induced menopause, and premature ovarian insufficiency. But she would go on to discuss a less widely recognized condition, functional hypothalamic amenorrhea, that also may be contributing to increased cardiovascular risk.

First, Dr. Shufelt reviewed the evidence supporting the relationship between estrogen and cardiovascular health, starting with the Framingham study’s findings that cardiovascular disease is approximately two to four times more common in postmenopausal women than in premenopausal women, depending on the age range.

“Menopause at an early age, particularly under the age of 40, matters,” Dr. Shufelt said. “So we should be discussing this with our patients.”

Surgical menopause makes a difference to cardiovascular health as well, she said. In women under age 35, for example, the risk of a nonfatal heart attack in those with a bilateral oophorectomy was 7.7 times greater than in women who retained both ovaries and their uterus, and 1.5 times greater in women who had a hysterectomy without bilateral oophorectomy.

In a 2019 study, surgical premature menopause was associated with an 87% increased risk of heart disease even after researchers accounted for age, cardiovascular risk factors, and some forms of hormone therapy. The increased risk from natural premature menopause, on the other hand, was lower – a 36% increased risk of heart disease – compared with those producing endogenous hormones. Although randomized controlled trials are unavailable and unlikely to be done, the Nurses’ Health Study and the Danish Nurses Cohort Study, both observational studies, found that heart disease risk was diminished in those taking hormone therapy after surgical premature menopause.

Recommendations for premature or early menopause, from a wide range of different medical societies including NAMS, are that women without contraindications be given estrogen-based hormone therapy until the average age of natural menopause. Though not included in the same guidance, research has also shown that estrogen after oophorectomy does not increase the risk of breast cancer in women with a BRCA1 mutation, Dr. Shufelt said. Hormone therapy for premature or early menopause should adequately replace the levels women have lost and that means younger menopausal women often need higher doses than what older women receive, such as 2 mg/day of oral estradiol rather than the standard doses of 0.5 or 1 mg/day.
 

Functional hypothalamic amenorrhea and cardiovascular risk

Dr. Shufelt then discussed functional hypothalamic amenorrhea (hypogonadotropic hypogonadism), a common type of secondary amenorrhea that affects at least 1.4 million U.S. women. Diagnosis includes lack of a period for at least 3 months in someone who previously menstruated plus lab values below 50 pg/mL for estradiol, below 10 mIU/L for follicle stimulating hormone, and below 10 mIU/L for luteinizing hormone. Causes of this reversible form of infertility can include stress, overexercising, undereating, or some combination of these, plus an underlying genetic predisposition.

“After ruling out polycystic ovary syndrome, prolactinoma, and thyroid dysfunction, clinicians need to consider the diagnosis of hypothalamic amenorrhea,” Dr. Shufelt said. This condition goes beyond low estrogen levels: Women have elevated cortisol, low thyroid levels, low leptin levels, and increased ghrelin.

”This is not going away,” Dr. Shufelt said, sharing data on stress levels among U.S. adults, particularly Gen Z and millennial adults, noting that the ongoing “national mental health crisis” may be contributing to functional hypothalamic amenorrhea.

A 2020 substudy from the Nurses’ Health Study II found an increased risk of premature death in those who didn’t have a period or always had irregular periods starting as early as 14-17 years old. The increased risk of premature death rose with age in those with irregular or absent cycles – a 37% higher risk in 18- to 22-year-olds and a 39% increased risk in 29- to 46-year-olds.

But clinicians aren’t adequately identifying the “phenotype of the hypothalamic women,” Dr. Shufelt said, despite research showing overlap between hypothalamic amenorrhea and a higher risk of cardiovascular disease. Hypothalamic amenorrhea is so understudied that the last original research on the topic was in 2008, Dr. Shufelt said in an interview. ”No research except mine has been done to evaluate heart health in these young women,” she said.

Dr. Shufelt described a study she led involving 30 women with functional hypothalamic amenorrhea, 29 women with normal menstrual cycles, and 30 women who were recently menopausal and not on hormone therapy. The women with hypothalamic amenorrhea had average stress levels but their depression scores were higher than those of the other two groups.

The results showed that women with hypothalamic amenorrhea had lower estradiol and leptin levels and higher testosterone levels compared with the control group, and they had higher cortisol levels than those of both groups. Despite having similar body mass indexes as the control and menopausal groups, women with hypothalamic amenorrhea had lower blood pressure than that of the other two groups, yet they had higher cholesterol levels than those of the control group. EndoPAT^© (Itamar Medical) testing showed that they had poor vascular function.

“In fact, one-third of the women [with hypothalamic amenorrhea] entered the trial with a diagnosis of what would be considered endothelial dysfunction,” Dr. Shufelt said. “Our results demonstrated significantly higher circulating levels of serum proinflammatory cytokines in the women with hypothalamic amenorrhea compared to eumenorrheic controls.”

Dr. Shufelt’s team then tested whether giving estradiol to the women with hypothalamic amenorrhea for 12 weeks would improve their vascular health, but they saw no significant differences between the women who received estrogen and those who received placebo.

“Endothelial function is partly mediated by estrogen, and it was expected that giving back estrogen would ‘fix’ the endothelium, but that is not what happened,” Nanette Santoro, MD, professor and chair of obstetrics and gynecology at the University of Colorado at Denver, Aurora, said in interview. “The mechanisms that maintain vascular function in women are not limited to hormones,” said Dr. Santoro, who was not involved in Dr. Shufelt’s study but attended her lecture. “We need to think beyond the simple model of estrogen-good, no-estrogen-bad.”

Dr. Santoro noted how easy it is to overlook the women who may have cardiovascular risk because of hypothalamic amenorrhea.

“Because many women with functional hypothalamic amenorrhea are super athletic and do not have the typical features of people with cardiometabolic disease – such as glucose intolerance, obesity, abnormal cholesterol or triglycerides, or high blood pressure – clinicians tend to think of them as healthy and to think that simply giving back hormones will fix the problems with bone density and vascular function, but that is not enough,” Dr. Santoro said. “The cognitive-behavioral therapy model for treatment of women with functional hypothalamic amenorrhea addresses the stress-related factors that drive the disorder, and this needs to be considered the standard of care for treatment.”

Stephanie S. Faubion, MD, professor of medicine and director of Mayo Clinic’s Center for Women’s Health in Jacksonville, Fla., who was not involved in Dr. Shufelt’s presentation, also emphasized the importance of recognizing functional hypothalamic amenorrhea.

“This is an underrecognized entity to begin with, and the fact that these women appear to be at increased risk for vascular dysfunction and potentially increased risk for cardiovascular disease down the road makes it even more important for clinicians to identify them and provide interventions early on,” Dr. Faubion said in an interview. “These women need to be identified and the etiology of the amenorrhea addressed, whether it relates to overexercising, being underweight, or experiencing significant stressors that have led to the loss of menstrual cycles.”

Dr. Shufelt’s research was funded by the National Institutes of Health. She had no disclosures. Dr. Santoro is a member of the scientific advisory board for Astellas, Menogenix, Amazon Ember, and Que Oncology, and she consults for Ansh Labs. Dr. Faubion had no disclosures.

Black mothers giving birth in hospitals are 53% more likely to die during childbirth than are Hispanic and White women, according to researchers who attributed the gap at least in part to bias among physicians and the health care system.

The United States is in the midst of a maternal healthcare crisis, said Robert White, MD, assistant professor of anesthesiology at Weill Cornell Medicine, New York, and lead author of the study. The maternal death rate among U.S. women in 2018, for instance, was 17.4 per 100,000 births, more than twice the figure in Canada (8.6 per 100,000 live births) and the United Kingdom (6.5 per 100,000 live births in 2016), according to the Commonwealth Fund.

“At baseline, our maternal mortality rates are higher than other comparable Western nations, and at the same time, there’s a huge spread in the maternal mortality ratio between White mothers and Black mothers, where Black mothers are experiencing maternal mortality about two or three times higher,” Dr. White told this news organization.

Previous research has shown racial disparities in rates of maternal mortality. But Dr. White said that his study controlled for income level, type of insurance, and other social factors that may have affected the health of the women.

“The research that I conducted is one of the largest of its kind, and the logistic regression model that we were able to run was able to control for a lot of these factors,” he said.

For the new study, presented at the 2022 annual meeting of the American Society of Anesthesiologists, Dr. White and his team analyzed data from 9.5 million deliveries across six states (California, Florida, Kentucky, Maryland, New York, and Washington) between 2007 and 2018. They found that 49,472 mothers (0.5%) either died in the hospital or experienced an injury during childbirth, which included damages to the brain, heart, eyes, or kidneys.

Overall, 0.8% of Black women experienced either a death or an injury, compared with 0.5% of Hispanic women and 0.4% of White women. The researchers concluded that Black women had a 53% increased chance of dying during childbirth in a hospital, even after adjusting for factors such as insurance type, hospital type, and income.

If income, insurance type, and other social factors aren’t driving this disparity in maternal mortality, what is? Dr. White said that the study didn’t uncover the underlying cause, but in his opinion, racial bias and systemic racism are likely contributing to the gap in deaths.

“I think the takeaway for physicians should be that we should humbly accept that prejudice, bias, and racism does exist among physicians,” Dr. White said.

Adi Davidov, MD, associate chair of obstetrics and gynecology at Staten Island (N.Y.) University Hospital, said that both anesthesiologists and ob.gyns. have been aware of these disparate health outcomes for years but have historically attributed the higher odds of injuries and death amongst Black women to health issues rather than racism.

“It is now quite evident that there is more to the story and that there is a degree of unconscious bias as well as systemic racism in health care that contributes to the disparities in outcomes,” said Dr. Davidov, who was not involved in the study.

Meanwhile, new data show that maternal mortality worsened during the COVID-19 pandemic, particularly for Black women. The rate of maternal death for Black women was 44 per 100,000 live births in 2019, 55.3 in 2020, and 68.9 in 2021, according to the U.S. Government Accountability Office. In contrast, White women had death rates of 17.9, 19.1, and 26.1, respectively.

“Bias or discrimination within the health care system can create communication challenges between providers and their patients, which may increase the risk of adverse outcomes,” the report stated.
 

What can be done

The most important thing physicians can do is to understand and acknowledge unconscious bias, Dr. Davidov told this news organization. “It is important to learn how to identify biases and make sure that it does not affect your medical decision making,” he said.

Dr. White suggested that physicians receive training in implicit bias and cultural competency and stay up to date on research regarding race and medicine as well as learning and using inclusive language.

He also urged physicians closely follow protocols for standard care for their discipline.

“Standardized care protocols have been shown to reduce variance between care of patients of different social structures and shown to decrease this disparity gap,” he said.

The study was supported by a Foundation for Anesthesia Education and Research Mentored Research Training Grant. Dr. White and Dr. Davidov report no relevant financial relationships.

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

Black mothers giving birth in hospitals are 53% more likely to die during childbirth than are Hispanic and White women, according to researchers who attributed the gap at least in part to bias among physicians and the health care system.

The United States is in the midst of a maternal healthcare crisis, said Robert White, MD, assistant professor of anesthesiology at Weill Cornell Medicine, New York, and lead author of the study. The maternal death rate among U.S. women in 2018, for instance, was 17.4 per 100,000 births, more than twice the figure in Canada (8.6 per 100,000 live births) and the United Kingdom (6.5 per 100,000 live births in 2016), according to the Commonwealth Fund.

“At baseline, our maternal mortality rates are higher than other comparable Western nations, and at the same time, there’s a huge spread in the maternal mortality ratio between White mothers and Black mothers, where Black mothers are experiencing maternal mortality about two or three times higher,” Dr. White told this news organization.

Previous research has shown racial disparities in rates of maternal mortality. But Dr. White said that his study controlled for income level, type of insurance, and other social factors that may have affected the health of the women.

“The research that I conducted is one of the largest of its kind, and the logistic regression model that we were able to run was able to control for a lot of these factors,” he said.

For the new study, presented at the 2022 annual meeting of the American Society of Anesthesiologists, Dr. White and his team analyzed data from 9.5 million deliveries across six states (California, Florida, Kentucky, Maryland, New York, and Washington) between 2007 and 2018. They found that 49,472 mothers (0.5%) either died in the hospital or experienced an injury during childbirth, which included damages to the brain, heart, eyes, or kidneys.

Overall, 0.8% of Black women experienced either a death or an injury, compared with 0.5% of Hispanic women and 0.4% of White women. The researchers concluded that Black women had a 53% increased chance of dying during childbirth in a hospital, even after adjusting for factors such as insurance type, hospital type, and income.

If income, insurance type, and other social factors aren’t driving this disparity in maternal mortality, what is? Dr. White said that the study didn’t uncover the underlying cause, but in his opinion, racial bias and systemic racism are likely contributing to the gap in deaths.

“I think the takeaway for physicians should be that we should humbly accept that prejudice, bias, and racism does exist among physicians,” Dr. White said.

Adi Davidov, MD, associate chair of obstetrics and gynecology at Staten Island (N.Y.) University Hospital, said that both anesthesiologists and ob.gyns. have been aware of these disparate health outcomes for years but have historically attributed the higher odds of injuries and death amongst Black women to health issues rather than racism.

“It is now quite evident that there is more to the story and that there is a degree of unconscious bias as well as systemic racism in health care that contributes to the disparities in outcomes,” said Dr. Davidov, who was not involved in the study.

Meanwhile, new data show that maternal mortality worsened during the COVID-19 pandemic, particularly for Black women. The rate of maternal death for Black women was 44 per 100,000 live births in 2019, 55.3 in 2020, and 68.9 in 2021, according to the U.S. Government Accountability Office. In contrast, White women had death rates of 17.9, 19.1, and 26.1, respectively.

“Bias or discrimination within the health care system can create communication challenges between providers and their patients, which may increase the risk of adverse outcomes,” the report stated.
 

What can be done

The most important thing physicians can do is to understand and acknowledge unconscious bias, Dr. Davidov told this news organization. “It is important to learn how to identify biases and make sure that it does not affect your medical decision making,” he said.

Dr. White suggested that physicians receive training in implicit bias and cultural competency and stay up to date on research regarding race and medicine as well as learning and using inclusive language.

He also urged physicians closely follow protocols for standard care for their discipline.

“Standardized care protocols have been shown to reduce variance between care of patients of different social structures and shown to decrease this disparity gap,” he said.

The study was supported by a Foundation for Anesthesia Education and Research Mentored Research Training Grant. Dr. White and Dr. Davidov report no relevant financial relationships.