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A Banned Chemical That Is Still Causing Cancer
This transcript has been edited for clarity.
These types of stories usually end with a call for regulation — to ban said chemical or substance, or to regulate it — but in this case, that has already happened. This new carcinogen I’m telling you about is actually an old chemical. And it has not been manufactured or legally imported in the US since 2013.
So, why bother? Because in this case, the chemical — or, really, a group of chemicals called polybrominated diphenyl ethers (PBDEs) — are still around: in our soil, in our food, and in our blood.
PBDEs are a group of compounds that confer flame-retardant properties to plastics, and they were used extensively in the latter part of the 20th century in electronic enclosures, business equipment, and foam cushioning in upholstery.
But there was a problem. They don’t chemically bond to plastics; they are just sort of mixed in, which means they can leach out. They are hydrophobic, meaning they don’t get washed out of soil, and, when ingested or inhaled by humans, they dissolve in our fat stores, making it difficult for our normal excretory systems to excrete them.
PBDEs biomagnify. Small animals can take them up from contaminated soil or water, and those animals are eaten by larger animals, which accumulate higher concentrations of the chemicals. This bioaccumulation increases as you move up the food web until you get to an apex predator — like you and me.
This is true of lots of chemicals, of course. The concern arises when these chemicals are toxic. To date, the toxicity data for PBDEs were pretty limited. There were some animal studies where rats were exposed to extremely high doses and they developed liver lesions — but I am always very wary of extrapolating high-dose rat toxicity studies to humans. There was also some suggestion that the chemicals could be endocrine disruptors, affecting breast and thyroid tissue.
What about cancer? In 2016, the International Agency for Research on Cancer concluded there was “inadequate evidence in humans for the carcinogencity of” PBDEs.
In the same report, though, they suggested PBDEs are “probably carcinogenic to humans” based on mechanistic studies.
In other words, we can’t prove they’re cancerous — but come on, they probably are.
Finally, we have some evidence that really pushes us toward the carcinogenic conclusion, in the form of this study, appearing in JAMA Network Open. It’s a nice bit of epidemiology leveraging the population-based National Health and Nutrition Examination Survey (NHANES).
Researchers measured PBDE levels in blood samples from 1100 people enrolled in NHANES in 2003 and 2004 and linked them to death records collected over the next 20 years or so.
The first thing to note is that the researchers were able to measure PBDEs in the blood samples. They were in there. They were detectable. And they were variable. Dividing the 1100 participants into low, medium, and high PBDE tertiles, you can see a nearly 10-fold difference across the population.
Importantly, not many baseline variables correlated with PBDE levels. People in the highest group were a bit younger but had a fairly similar sex distribution, race, ethnicity, education, income, physical activity, smoking status, and body mass index.
This is not a randomized trial, of course — but at least based on these data, exposure levels do seem fairly random, which is what you would expect from an environmental toxin that percolates up through the food chain. They are often somewhat indiscriminate.
This similarity in baseline characteristics between people with low or high blood levels of PBDE also allows us to make some stronger inferences about the observed outcomes. Let’s take a look at them.
After adjustment for baseline factors, individuals in the highest PBDE group had a 43% higher rate of death from any cause over the follow-up period. This was not enough to achieve statistical significance, but it was close.
But the key finding is deaths due to cancer. After adjustment, cancer deaths occurred four times as frequently among those in the high PBDE group, and that is a statistically significant difference.
To be fair, cancer deaths were rare in this cohort. The vast majority of people did not die of anything during the follow-up period regardless of PBDE level. But the data are strongly suggestive of the carcinogenicity of these chemicals.
I should also point out that the researchers are linking the PBDE level at a single time point to all these future events. If PBDE levels remain relatively stable within an individual over time, that’s fine, but if they tend to vary with intake of different foods for example, this would not be captured and would actually lead to an underestimation of the cancer risk.
The researchers also didn’t have granular enough data to determine the type of cancer, but they do show that rates are similar between men and women, which might point away from the more sex-specific cancer etiologies. Clearly, some more work is needed.
Of course, I started this piece by telling you that these chemicals are already pretty much banned in the United States. What are we supposed to do about these findings? Studies have examined the primary ongoing sources of PBDE in our environment and it seems like most of our exposure will be coming from the food we eat due to that biomagnification thing: high-fat fish, meat and dairy products, and fish oil supplements. It may be worth some investigation into the relative adulteration of these products with this new old carcinogen.
Dr. F. Perry Wilson is associate professor of medicine and public health and director of the Clinical and Translational Research Accelerator at Yale University, New Haven, Conn. He has disclosed no relevant financial relationships.
A version of this article appeared on Medscape.com.
This transcript has been edited for clarity.
These types of stories usually end with a call for regulation — to ban said chemical or substance, or to regulate it — but in this case, that has already happened. This new carcinogen I’m telling you about is actually an old chemical. And it has not been manufactured or legally imported in the US since 2013.
So, why bother? Because in this case, the chemical — or, really, a group of chemicals called polybrominated diphenyl ethers (PBDEs) — are still around: in our soil, in our food, and in our blood.
PBDEs are a group of compounds that confer flame-retardant properties to plastics, and they were used extensively in the latter part of the 20th century in electronic enclosures, business equipment, and foam cushioning in upholstery.
But there was a problem. They don’t chemically bond to plastics; they are just sort of mixed in, which means they can leach out. They are hydrophobic, meaning they don’t get washed out of soil, and, when ingested or inhaled by humans, they dissolve in our fat stores, making it difficult for our normal excretory systems to excrete them.
PBDEs biomagnify. Small animals can take them up from contaminated soil or water, and those animals are eaten by larger animals, which accumulate higher concentrations of the chemicals. This bioaccumulation increases as you move up the food web until you get to an apex predator — like you and me.
This is true of lots of chemicals, of course. The concern arises when these chemicals are toxic. To date, the toxicity data for PBDEs were pretty limited. There were some animal studies where rats were exposed to extremely high doses and they developed liver lesions — but I am always very wary of extrapolating high-dose rat toxicity studies to humans. There was also some suggestion that the chemicals could be endocrine disruptors, affecting breast and thyroid tissue.
What about cancer? In 2016, the International Agency for Research on Cancer concluded there was “inadequate evidence in humans for the carcinogencity of” PBDEs.
In the same report, though, they suggested PBDEs are “probably carcinogenic to humans” based on mechanistic studies.
In other words, we can’t prove they’re cancerous — but come on, they probably are.
Finally, we have some evidence that really pushes us toward the carcinogenic conclusion, in the form of this study, appearing in JAMA Network Open. It’s a nice bit of epidemiology leveraging the population-based National Health and Nutrition Examination Survey (NHANES).
Researchers measured PBDE levels in blood samples from 1100 people enrolled in NHANES in 2003 and 2004 and linked them to death records collected over the next 20 years or so.
The first thing to note is that the researchers were able to measure PBDEs in the blood samples. They were in there. They were detectable. And they were variable. Dividing the 1100 participants into low, medium, and high PBDE tertiles, you can see a nearly 10-fold difference across the population.
Importantly, not many baseline variables correlated with PBDE levels. People in the highest group were a bit younger but had a fairly similar sex distribution, race, ethnicity, education, income, physical activity, smoking status, and body mass index.
This is not a randomized trial, of course — but at least based on these data, exposure levels do seem fairly random, which is what you would expect from an environmental toxin that percolates up through the food chain. They are often somewhat indiscriminate.
This similarity in baseline characteristics between people with low or high blood levels of PBDE also allows us to make some stronger inferences about the observed outcomes. Let’s take a look at them.
After adjustment for baseline factors, individuals in the highest PBDE group had a 43% higher rate of death from any cause over the follow-up period. This was not enough to achieve statistical significance, but it was close.
But the key finding is deaths due to cancer. After adjustment, cancer deaths occurred four times as frequently among those in the high PBDE group, and that is a statistically significant difference.
To be fair, cancer deaths were rare in this cohort. The vast majority of people did not die of anything during the follow-up period regardless of PBDE level. But the data are strongly suggestive of the carcinogenicity of these chemicals.
I should also point out that the researchers are linking the PBDE level at a single time point to all these future events. If PBDE levels remain relatively stable within an individual over time, that’s fine, but if they tend to vary with intake of different foods for example, this would not be captured and would actually lead to an underestimation of the cancer risk.
The researchers also didn’t have granular enough data to determine the type of cancer, but they do show that rates are similar between men and women, which might point away from the more sex-specific cancer etiologies. Clearly, some more work is needed.
Of course, I started this piece by telling you that these chemicals are already pretty much banned in the United States. What are we supposed to do about these findings? Studies have examined the primary ongoing sources of PBDE in our environment and it seems like most of our exposure will be coming from the food we eat due to that biomagnification thing: high-fat fish, meat and dairy products, and fish oil supplements. It may be worth some investigation into the relative adulteration of these products with this new old carcinogen.
Dr. F. Perry Wilson is associate professor of medicine and public health and director of the Clinical and Translational Research Accelerator at Yale University, New Haven, Conn. He has disclosed no relevant financial relationships.
A version of this article appeared on Medscape.com.
This transcript has been edited for clarity.
These types of stories usually end with a call for regulation — to ban said chemical or substance, or to regulate it — but in this case, that has already happened. This new carcinogen I’m telling you about is actually an old chemical. And it has not been manufactured or legally imported in the US since 2013.
So, why bother? Because in this case, the chemical — or, really, a group of chemicals called polybrominated diphenyl ethers (PBDEs) — are still around: in our soil, in our food, and in our blood.
PBDEs are a group of compounds that confer flame-retardant properties to plastics, and they were used extensively in the latter part of the 20th century in electronic enclosures, business equipment, and foam cushioning in upholstery.
But there was a problem. They don’t chemically bond to plastics; they are just sort of mixed in, which means they can leach out. They are hydrophobic, meaning they don’t get washed out of soil, and, when ingested or inhaled by humans, they dissolve in our fat stores, making it difficult for our normal excretory systems to excrete them.
PBDEs biomagnify. Small animals can take them up from contaminated soil or water, and those animals are eaten by larger animals, which accumulate higher concentrations of the chemicals. This bioaccumulation increases as you move up the food web until you get to an apex predator — like you and me.
This is true of lots of chemicals, of course. The concern arises when these chemicals are toxic. To date, the toxicity data for PBDEs were pretty limited. There were some animal studies where rats were exposed to extremely high doses and they developed liver lesions — but I am always very wary of extrapolating high-dose rat toxicity studies to humans. There was also some suggestion that the chemicals could be endocrine disruptors, affecting breast and thyroid tissue.
What about cancer? In 2016, the International Agency for Research on Cancer concluded there was “inadequate evidence in humans for the carcinogencity of” PBDEs.
In the same report, though, they suggested PBDEs are “probably carcinogenic to humans” based on mechanistic studies.
In other words, we can’t prove they’re cancerous — but come on, they probably are.
Finally, we have some evidence that really pushes us toward the carcinogenic conclusion, in the form of this study, appearing in JAMA Network Open. It’s a nice bit of epidemiology leveraging the population-based National Health and Nutrition Examination Survey (NHANES).
Researchers measured PBDE levels in blood samples from 1100 people enrolled in NHANES in 2003 and 2004 and linked them to death records collected over the next 20 years or so.
The first thing to note is that the researchers were able to measure PBDEs in the blood samples. They were in there. They were detectable. And they were variable. Dividing the 1100 participants into low, medium, and high PBDE tertiles, you can see a nearly 10-fold difference across the population.
Importantly, not many baseline variables correlated with PBDE levels. People in the highest group were a bit younger but had a fairly similar sex distribution, race, ethnicity, education, income, physical activity, smoking status, and body mass index.
This is not a randomized trial, of course — but at least based on these data, exposure levels do seem fairly random, which is what you would expect from an environmental toxin that percolates up through the food chain. They are often somewhat indiscriminate.
This similarity in baseline characteristics between people with low or high blood levels of PBDE also allows us to make some stronger inferences about the observed outcomes. Let’s take a look at them.
After adjustment for baseline factors, individuals in the highest PBDE group had a 43% higher rate of death from any cause over the follow-up period. This was not enough to achieve statistical significance, but it was close.
But the key finding is deaths due to cancer. After adjustment, cancer deaths occurred four times as frequently among those in the high PBDE group, and that is a statistically significant difference.
To be fair, cancer deaths were rare in this cohort. The vast majority of people did not die of anything during the follow-up period regardless of PBDE level. But the data are strongly suggestive of the carcinogenicity of these chemicals.
I should also point out that the researchers are linking the PBDE level at a single time point to all these future events. If PBDE levels remain relatively stable within an individual over time, that’s fine, but if they tend to vary with intake of different foods for example, this would not be captured and would actually lead to an underestimation of the cancer risk.
The researchers also didn’t have granular enough data to determine the type of cancer, but they do show that rates are similar between men and women, which might point away from the more sex-specific cancer etiologies. Clearly, some more work is needed.
Of course, I started this piece by telling you that these chemicals are already pretty much banned in the United States. What are we supposed to do about these findings? Studies have examined the primary ongoing sources of PBDE in our environment and it seems like most of our exposure will be coming from the food we eat due to that biomagnification thing: high-fat fish, meat and dairy products, and fish oil supplements. It may be worth some investigation into the relative adulteration of these products with this new old carcinogen.
Dr. F. Perry Wilson is associate professor of medicine and public health and director of the Clinical and Translational Research Accelerator at Yale University, New Haven, Conn. He has disclosed no relevant financial relationships.
A version of this article appeared on Medscape.com.
What We’ve Learned About Remote Learning
I would have preferred to start this Letter reporting to you that the pandemic is fading out of sight in our rear view mirror. However, I think it is more accurate to say the pandemic is sitting in that blind spot off our passenger side rear fender. Unless you’re like one of those cars with “blind spot detection” blinking a warning, you probably aren’t giving the pandemic much thought. However, three journalists at The New York Times have taken this lull in the pandemic’s newsworthiness to consider the consequences of school closure and remote learning.
From what you may have read and heard, and possibly experienced firsthand, you have a sense that keeping children out of school has been awash in negatives. These journalists looked at all the data they could find and their article is replete with graphs and references. I will just summarize some of what they discovered.
“While poverty and other factors played a role, remote learning was a key driver in academic declines ...” They found there was a direct relationship between the length of school closure and the severity of academic skill loss. The journalists noted that “some time in school was better than no time.” And sadly, “most students have not caught up.”
Poverty played a significant role, with students in economically challenged communities experiencing steeper losses in academics. The reporters quoted Stanford Professor Sean F. Reardon, EdD, who has said “A community’s poverty rate and length of school closures had a ‘roughly equal’ effect.” Poorer school districts tended to continue remote learning longer than those in more well off communities.
At the very beginning of the pandemic, when we were floating in a sea of unknowns, the decision to close schools and take advantage of the new technology that made remote learning possible sounded like the best and maybe only option. However, looking back, Dr. Sean O’Leary, who helped craft AAP guidelines, admits “we probably kept schools closed longer than we should have.”
Early signs that children were not as likely as adults to get sick, and that students posed little threat to others in the school environment, were not taken seriously enough. Too much time and energy was wasted in deep cleaning even after it was clear the virus was airborne. Opening windows that had been painted shut would have been a much better investment.
As it became more apparent that school closures were not having the deterrent effect we had hoped for, there were still communities that resisted. The Times’ reporters noted that teachers’ unions and Democratic cities tended to be more cautious about reopening. And clearly there was political flavor to how communities responded. Masking is probably one of the best examples where emotions and politics colored our responses.
Are there things we could have done differently? One can certainly understand why teachers might have been cautious about returning to in-school learning. With more than a quarter of teachers in this country being older than 50 (16% over 55) and nearly 80% of elementary and middle school teachers self-reporting that they are obese or overweight, educators represent a group that we know now is more vulnerable to complications from COVID. In retrospect, had we understood more about the virus and the downsides of remote learning, the government could have offered paid leave to teachers who felt vulnerable. Then, by expediting the transition of the younger, less vulnerable college students in their final years of training into the workforce earlier could have kept schools open until we were up to speed with vaccines and treatment. But the water has spilled over the dam. We can hope that we as a nation have learned that making frequent evaluations of our strategies and being flexible enough to make changes will help in future pandemics. Unfortunately, those RNA viruses are fast mutators and clever adapters. Strategies we thought were working the first time may not succeed with new variants.
We have now learned that, in general, remote learning was a bust. My grandkids knew it at the time. It’s not just the learning piece. It’s about the social contact with peers that can provide comfort and support when the adults around at home may be anxious and depressed. School is a place you can be physically active away from 24/7 television at home. Adapting to going to school can be difficult for some young children in the beginning because of separation anxiety, but for the vast majority of children doing the school thing is a habit that is quickly rewarded and reinforced daily.
Children learn in school because they are rubbing elbows with other kids who are learning. While some peers may be distracting, the data suggest the distractions of home are far more of a problem. Most children I know were eager to get back in school because that’s where their friends were. But, getting back in the habit of going to school can be difficult for some, especially those who have been less successful in the past. Not surprisingly, the longer the hiatus the more difficult the reentry becomes.
The big lesson we mustn’t forget is that being in school is far more valuable than we ever imagined. And, when we are considering our options in future pandemics and natural disasters, we should be giving much more weight to in-school learning than we have in the past.
Dr. Wilkoff practiced primary care pediatrics in Brunswick, Maine, for nearly 40 years. He has authored several books on behavioral pediatrics, including “How to Say No to Your Toddler.” Other than a Littman stethoscope he accepted as a first-year medical student in 1966, Dr. Wilkoff reports having nothing to disclose. Email him at [email protected].
I would have preferred to start this Letter reporting to you that the pandemic is fading out of sight in our rear view mirror. However, I think it is more accurate to say the pandemic is sitting in that blind spot off our passenger side rear fender. Unless you’re like one of those cars with “blind spot detection” blinking a warning, you probably aren’t giving the pandemic much thought. However, three journalists at The New York Times have taken this lull in the pandemic’s newsworthiness to consider the consequences of school closure and remote learning.
From what you may have read and heard, and possibly experienced firsthand, you have a sense that keeping children out of school has been awash in negatives. These journalists looked at all the data they could find and their article is replete with graphs and references. I will just summarize some of what they discovered.
“While poverty and other factors played a role, remote learning was a key driver in academic declines ...” They found there was a direct relationship between the length of school closure and the severity of academic skill loss. The journalists noted that “some time in school was better than no time.” And sadly, “most students have not caught up.”
Poverty played a significant role, with students in economically challenged communities experiencing steeper losses in academics. The reporters quoted Stanford Professor Sean F. Reardon, EdD, who has said “A community’s poverty rate and length of school closures had a ‘roughly equal’ effect.” Poorer school districts tended to continue remote learning longer than those in more well off communities.
At the very beginning of the pandemic, when we were floating in a sea of unknowns, the decision to close schools and take advantage of the new technology that made remote learning possible sounded like the best and maybe only option. However, looking back, Dr. Sean O’Leary, who helped craft AAP guidelines, admits “we probably kept schools closed longer than we should have.”
Early signs that children were not as likely as adults to get sick, and that students posed little threat to others in the school environment, were not taken seriously enough. Too much time and energy was wasted in deep cleaning even after it was clear the virus was airborne. Opening windows that had been painted shut would have been a much better investment.
As it became more apparent that school closures were not having the deterrent effect we had hoped for, there were still communities that resisted. The Times’ reporters noted that teachers’ unions and Democratic cities tended to be more cautious about reopening. And clearly there was political flavor to how communities responded. Masking is probably one of the best examples where emotions and politics colored our responses.
Are there things we could have done differently? One can certainly understand why teachers might have been cautious about returning to in-school learning. With more than a quarter of teachers in this country being older than 50 (16% over 55) and nearly 80% of elementary and middle school teachers self-reporting that they are obese or overweight, educators represent a group that we know now is more vulnerable to complications from COVID. In retrospect, had we understood more about the virus and the downsides of remote learning, the government could have offered paid leave to teachers who felt vulnerable. Then, by expediting the transition of the younger, less vulnerable college students in their final years of training into the workforce earlier could have kept schools open until we were up to speed with vaccines and treatment. But the water has spilled over the dam. We can hope that we as a nation have learned that making frequent evaluations of our strategies and being flexible enough to make changes will help in future pandemics. Unfortunately, those RNA viruses are fast mutators and clever adapters. Strategies we thought were working the first time may not succeed with new variants.
We have now learned that, in general, remote learning was a bust. My grandkids knew it at the time. It’s not just the learning piece. It’s about the social contact with peers that can provide comfort and support when the adults around at home may be anxious and depressed. School is a place you can be physically active away from 24/7 television at home. Adapting to going to school can be difficult for some young children in the beginning because of separation anxiety, but for the vast majority of children doing the school thing is a habit that is quickly rewarded and reinforced daily.
Children learn in school because they are rubbing elbows with other kids who are learning. While some peers may be distracting, the data suggest the distractions of home are far more of a problem. Most children I know were eager to get back in school because that’s where their friends were. But, getting back in the habit of going to school can be difficult for some, especially those who have been less successful in the past. Not surprisingly, the longer the hiatus the more difficult the reentry becomes.
The big lesson we mustn’t forget is that being in school is far more valuable than we ever imagined. And, when we are considering our options in future pandemics and natural disasters, we should be giving much more weight to in-school learning than we have in the past.
Dr. Wilkoff practiced primary care pediatrics in Brunswick, Maine, for nearly 40 years. He has authored several books on behavioral pediatrics, including “How to Say No to Your Toddler.” Other than a Littman stethoscope he accepted as a first-year medical student in 1966, Dr. Wilkoff reports having nothing to disclose. Email him at [email protected].
I would have preferred to start this Letter reporting to you that the pandemic is fading out of sight in our rear view mirror. However, I think it is more accurate to say the pandemic is sitting in that blind spot off our passenger side rear fender. Unless you’re like one of those cars with “blind spot detection” blinking a warning, you probably aren’t giving the pandemic much thought. However, three journalists at The New York Times have taken this lull in the pandemic’s newsworthiness to consider the consequences of school closure and remote learning.
From what you may have read and heard, and possibly experienced firsthand, you have a sense that keeping children out of school has been awash in negatives. These journalists looked at all the data they could find and their article is replete with graphs and references. I will just summarize some of what they discovered.
“While poverty and other factors played a role, remote learning was a key driver in academic declines ...” They found there was a direct relationship between the length of school closure and the severity of academic skill loss. The journalists noted that “some time in school was better than no time.” And sadly, “most students have not caught up.”
Poverty played a significant role, with students in economically challenged communities experiencing steeper losses in academics. The reporters quoted Stanford Professor Sean F. Reardon, EdD, who has said “A community’s poverty rate and length of school closures had a ‘roughly equal’ effect.” Poorer school districts tended to continue remote learning longer than those in more well off communities.
At the very beginning of the pandemic, when we were floating in a sea of unknowns, the decision to close schools and take advantage of the new technology that made remote learning possible sounded like the best and maybe only option. However, looking back, Dr. Sean O’Leary, who helped craft AAP guidelines, admits “we probably kept schools closed longer than we should have.”
Early signs that children were not as likely as adults to get sick, and that students posed little threat to others in the school environment, were not taken seriously enough. Too much time and energy was wasted in deep cleaning even after it was clear the virus was airborne. Opening windows that had been painted shut would have been a much better investment.
As it became more apparent that school closures were not having the deterrent effect we had hoped for, there were still communities that resisted. The Times’ reporters noted that teachers’ unions and Democratic cities tended to be more cautious about reopening. And clearly there was political flavor to how communities responded. Masking is probably one of the best examples where emotions and politics colored our responses.
Are there things we could have done differently? One can certainly understand why teachers might have been cautious about returning to in-school learning. With more than a quarter of teachers in this country being older than 50 (16% over 55) and nearly 80% of elementary and middle school teachers self-reporting that they are obese or overweight, educators represent a group that we know now is more vulnerable to complications from COVID. In retrospect, had we understood more about the virus and the downsides of remote learning, the government could have offered paid leave to teachers who felt vulnerable. Then, by expediting the transition of the younger, less vulnerable college students in their final years of training into the workforce earlier could have kept schools open until we were up to speed with vaccines and treatment. But the water has spilled over the dam. We can hope that we as a nation have learned that making frequent evaluations of our strategies and being flexible enough to make changes will help in future pandemics. Unfortunately, those RNA viruses are fast mutators and clever adapters. Strategies we thought were working the first time may not succeed with new variants.
We have now learned that, in general, remote learning was a bust. My grandkids knew it at the time. It’s not just the learning piece. It’s about the social contact with peers that can provide comfort and support when the adults around at home may be anxious and depressed. School is a place you can be physically active away from 24/7 television at home. Adapting to going to school can be difficult for some young children in the beginning because of separation anxiety, but for the vast majority of children doing the school thing is a habit that is quickly rewarded and reinforced daily.
Children learn in school because they are rubbing elbows with other kids who are learning. While some peers may be distracting, the data suggest the distractions of home are far more of a problem. Most children I know were eager to get back in school because that’s where their friends were. But, getting back in the habit of going to school can be difficult for some, especially those who have been less successful in the past. Not surprisingly, the longer the hiatus the more difficult the reentry becomes.
The big lesson we mustn’t forget is that being in school is far more valuable than we ever imagined. And, when we are considering our options in future pandemics and natural disasters, we should be giving much more weight to in-school learning than we have in the past.
Dr. Wilkoff practiced primary care pediatrics in Brunswick, Maine, for nearly 40 years. He has authored several books on behavioral pediatrics, including “How to Say No to Your Toddler.” Other than a Littman stethoscope he accepted as a first-year medical student in 1966, Dr. Wilkoff reports having nothing to disclose. Email him at [email protected].
When Does a Disease Become Its Own Specialty?
Once upon a time, treating multiple sclerosis (MS) was easy — steroids.
Then, in the 1990s, came Betaseron, then Avonex, then Copaxone. Suddenly we had three options to choose from, though overall roughly similar in efficacy (yeah, I’m leaving Novantrone out; it’s a niche drug). Treatment required some decision making, though not a huge amount. I usually laid out the different schedules and side effect to patients and let them decide.
MS treatment was uncomplicated enough that I knew family doctors who treated MS patients on their own, and I can’t say I could have done any better. If you’ve got a clear MRI, then prescribe Betaseron and hope.
Then came Rebif, then Tysabri, and then pretty much an explosion of new drugs which hasn’t slowed down. Next up are the BTK agents. An embarrassment of riches, though for patients, their families, and neurologists, a very welcome one.
But as more drugs come out, with different mechanisms of action and monitoring requirements, the treatment of MS becomes more complicated, slowly moving from the realm of a general neurologist to an MS subspecialist.
At some point it raises the question of when does a disease become its own specialty? Perhaps this is a bit of hyperbole — I’m pretty sure I’ll be seeing MS patients for a long time to come — but it’s a valid point. Especially as further research may subdivide MS treatment by genetics and other breakdowns.
Alzheimer’s disease may follow a similar (albeit very welcome) trajectory. While nothing really game-changing has come out in the 20 years, the number of new drugs and different mechanisms of action in development is large. Granted, not all of them will work, but hopefully some will. At some point it may come down to treating patients with a cocktail of drugs with separate ways of managing the disease, with guidance based on genetic or clinical profiles.
And that’s a good thing, but it may, again, move the disease from the province of general neurologists to subspecialists. Maybe that would be a good, maybe not. Probably will depend on the patient, their families, and other factors.
Of course, I may be overthinking this. The number of drugs we have for MS is nothing compared with the available treatments we have for hypertension, yet it’s certainly well within the capabilities of most internists to treat without referring to a cardiologist or nephrologist.
Perhaps the new drugs won’t make a difference except in a handful of cases. As new drugs come out we also move on from the old ones, dropping them from our mental armamentarium except in rare cases. When was the last time you prescribed Betaseron?
These drugs are very welcome, and very needed. I will be happy if we can beat back some of the diseases neurologist see, regardless of whom the patients and up seeing.
Dr. Block has a solo neurology practice in Scottsdale, Ariz.
Once upon a time, treating multiple sclerosis (MS) was easy — steroids.
Then, in the 1990s, came Betaseron, then Avonex, then Copaxone. Suddenly we had three options to choose from, though overall roughly similar in efficacy (yeah, I’m leaving Novantrone out; it’s a niche drug). Treatment required some decision making, though not a huge amount. I usually laid out the different schedules and side effect to patients and let them decide.
MS treatment was uncomplicated enough that I knew family doctors who treated MS patients on their own, and I can’t say I could have done any better. If you’ve got a clear MRI, then prescribe Betaseron and hope.
Then came Rebif, then Tysabri, and then pretty much an explosion of new drugs which hasn’t slowed down. Next up are the BTK agents. An embarrassment of riches, though for patients, their families, and neurologists, a very welcome one.
But as more drugs come out, with different mechanisms of action and monitoring requirements, the treatment of MS becomes more complicated, slowly moving from the realm of a general neurologist to an MS subspecialist.
At some point it raises the question of when does a disease become its own specialty? Perhaps this is a bit of hyperbole — I’m pretty sure I’ll be seeing MS patients for a long time to come — but it’s a valid point. Especially as further research may subdivide MS treatment by genetics and other breakdowns.
Alzheimer’s disease may follow a similar (albeit very welcome) trajectory. While nothing really game-changing has come out in the 20 years, the number of new drugs and different mechanisms of action in development is large. Granted, not all of them will work, but hopefully some will. At some point it may come down to treating patients with a cocktail of drugs with separate ways of managing the disease, with guidance based on genetic or clinical profiles.
And that’s a good thing, but it may, again, move the disease from the province of general neurologists to subspecialists. Maybe that would be a good, maybe not. Probably will depend on the patient, their families, and other factors.
Of course, I may be overthinking this. The number of drugs we have for MS is nothing compared with the available treatments we have for hypertension, yet it’s certainly well within the capabilities of most internists to treat without referring to a cardiologist or nephrologist.
Perhaps the new drugs won’t make a difference except in a handful of cases. As new drugs come out we also move on from the old ones, dropping them from our mental armamentarium except in rare cases. When was the last time you prescribed Betaseron?
These drugs are very welcome, and very needed. I will be happy if we can beat back some of the diseases neurologist see, regardless of whom the patients and up seeing.
Dr. Block has a solo neurology practice in Scottsdale, Ariz.
Once upon a time, treating multiple sclerosis (MS) was easy — steroids.
Then, in the 1990s, came Betaseron, then Avonex, then Copaxone. Suddenly we had three options to choose from, though overall roughly similar in efficacy (yeah, I’m leaving Novantrone out; it’s a niche drug). Treatment required some decision making, though not a huge amount. I usually laid out the different schedules and side effect to patients and let them decide.
MS treatment was uncomplicated enough that I knew family doctors who treated MS patients on their own, and I can’t say I could have done any better. If you’ve got a clear MRI, then prescribe Betaseron and hope.
Then came Rebif, then Tysabri, and then pretty much an explosion of new drugs which hasn’t slowed down. Next up are the BTK agents. An embarrassment of riches, though for patients, their families, and neurologists, a very welcome one.
But as more drugs come out, with different mechanisms of action and monitoring requirements, the treatment of MS becomes more complicated, slowly moving from the realm of a general neurologist to an MS subspecialist.
At some point it raises the question of when does a disease become its own specialty? Perhaps this is a bit of hyperbole — I’m pretty sure I’ll be seeing MS patients for a long time to come — but it’s a valid point. Especially as further research may subdivide MS treatment by genetics and other breakdowns.
Alzheimer’s disease may follow a similar (albeit very welcome) trajectory. While nothing really game-changing has come out in the 20 years, the number of new drugs and different mechanisms of action in development is large. Granted, not all of them will work, but hopefully some will. At some point it may come down to treating patients with a cocktail of drugs with separate ways of managing the disease, with guidance based on genetic or clinical profiles.
And that’s a good thing, but it may, again, move the disease from the province of general neurologists to subspecialists. Maybe that would be a good, maybe not. Probably will depend on the patient, their families, and other factors.
Of course, I may be overthinking this. The number of drugs we have for MS is nothing compared with the available treatments we have for hypertension, yet it’s certainly well within the capabilities of most internists to treat without referring to a cardiologist or nephrologist.
Perhaps the new drugs won’t make a difference except in a handful of cases. As new drugs come out we also move on from the old ones, dropping them from our mental armamentarium except in rare cases. When was the last time you prescribed Betaseron?
These drugs are very welcome, and very needed. I will be happy if we can beat back some of the diseases neurologist see, regardless of whom the patients and up seeing.
Dr. Block has a solo neurology practice in Scottsdale, Ariz.
Autoimmunity’s Female Bias and the Mysteries of Xist
Female bias in autoimmune disease can be profound, with nine females developing lupus for every male affected, and nearly twice that ratio seen in Sjögren disease.
For years, researchers have worked to determine the reasons for sex-linked differences in immune response and autoimmunity, with environmental factors, sex hormones, and X-chromosome inactivation — the process by which a second X chromosome is silenced — all seen as having roles.
More recently, different groups of researchers have homed in on a long noncoding RNA fragment called X-inactive specific transcript, or Xist, as a potential driver of sex bias in autoimmune disease. Xist, which occurs in female mammals, has been known since the 1990s as the master regulator of X-chromosome inactivation, the process by which the second X chromosome is silenced, averting a fatal double dose of X-linked genes.
The inactivation process, which scientists liken to wrapping the extra X with a fluffy cloud of proteins, occurs early in embryonic development. After its initial work silencing the X, Xist is produced throughout the female’s life, allowing X inactivation to be maintained.
But is it possible that Xist, and the many dozens of proteins it recruits to keep that extra X chromosome silent, can also provoke autoimmunity? This is the question that several teams of researchers have been grappling with, resulting in provocative findings and opening exciting new avenues of discovery.
Xist Protein Complexes Make Male Mice Vulnerable to Lupus
In February, researchers Howard Chang, MD, PhD, and Diana Dou, PhD, of Stanford University in Stanford, California, made worldwide news when they published results from an experiment using male mice genetically engineered to carry a non-silencing form of Xist on one of their chromosomes.
Xist acts like a scaffold, recruiting multiple protein complexes to help it do its job. Dr. Dou explained in an interview that her team has been eyeing suspiciously for years the dozens of proteins Xist recruits in the process of X-chromosome inactivation, many of which are known autoantigens.
When the mice were injected with pristane, a chemical that induces lupus-like autoimmunity in mice, the Xist-producing males developed symptoms at a rate similar to that of females, while wild-type male mice did not.
By using a male model, the scientists could determine whether Xist could cause an increased vulnerability for autoimmunity absent the influence of female hormones and development. “Everything else about the animal is male,” Dr. Dou commented. “You just add the formation of the Xist ribonucleoprotein particles — Xist RNA plus the associating proteins — to male cells that would not ordinarily have these particles. Is just having the particles present in these animals sufficient to increase their autoimmunity? This is what our paper showed: That just having expression of Xist, the presence of these Xist [ribonucleoproteins], is enough in permissive genetic backgrounds to invoke higher incidence and severity of autoimmune disease development in our pristane-induced lupus model.”
The Stanford group sees the Xist protein complex, which they have studied extensively, as a key to understanding how Xist might provoke autoimmunity. Nonetheless, Dr. Dou said, “It’s important to note that there are other contributing factors, which is why not all females develop autoimmunity, and we had very different results in our autoimmune-resistant mouse strain compared to the more autoimmune-prone strain. Xist is a factor, but many factors are required to subvert the checkpoints in immune balance and allow the progression to full-blown autoimmunity.”
Faulty X Inactivation and Gene Escape
The understanding that Xist might be implicated in autoimmune disease — and explain some of its female bias — is not new.
About a decade ago, Montserrat Anguera, PhD, a biologist at the University of Pennsylvania, Philadelphia, began looking at the relationship of X-chromosome inactivation, which by definition involves Xist, and lupus.
Dr. Anguera hypothesized that imperfect X inactivation allowed for greater escape of genes associated with immunity and autoimmunity. Studying patients with lupus, Dr. Anguera found that the silencing process was abnormal, allowing more of these genes to escape the silenced X — including toll-like receptor 7 (TLR-7) and other genes implicated in the pathogenesis of lupus.
“If you get increased expression of certain genes from the [silenced] X, like TLR-7, it can result in autoimmune disease,” Dr. Anguera said. “So what we think is that in the lupus patients, because the silencing is impacted, you’re going to have more expression happening from the inactive X. And then in conjunction with the active X, that’s going to throw off the dosage [of autoimmunity-linked genes]. You’re changing the dosage of genes, and that’s what’s critical.”
Even among patients with lupus whose symptoms are well controlled with medication, “if you look at their T cells and B cells, they still have messed up X inactivation,” Dr. Anguera said. “The Xist RNA that’s supposed to be tethered to the inactive X in a fluffy cloud is not localized, and instead is dispersed all over the nucleus.”
Dr. Anguera pointed out that autoimmune diseases are complex and can result from a combination of factors. “You also have a host of hormonal and environmental contributors, such as previous viral infections,” she said. And of course men can also develop lupus, meaning that the X chromosome cannot explain everything.
Dr. Anguera said that, while the findings by the Stanford scientists do not explain the full pathogenesis of lupus and related diseases, they still support a strong role for Xist in sex-biased autoimmune diseases. “It’s sort of another take on it,” she said.
Is It the Proteins, the RNA, or Both?
The Stanford team points to the proteins recruited by Xist in the process of X-chromosome inactivation as the likely trigger of autoimmunity. However, a group of researchers at Johns Hopkins University in Baltimore, Maryland, made the case in a 2022 paper that Xist RNA itself was dangerous. They found that numerous short RNA sequences within the Xist molecule serve as ligands for TLR-7. And TLR-7 ligation causes plasmacytoid dendritic cells to overproduce type 1 interferon, a classic hallmark of lupus.
“Within rheumatology, the diseases that tend to be most female biased are the ones that are antibody positive and have this presence of upregulated interferon,” explained Brendan Antiochos, MD. “Lupus is an example of that. Sjögren’s syndrome is another. So there’s always been this quest to want to understand the mechanisms that explain why women would have more autoimmunity. And are there specific pathways which could contribute? One of the key pathways that’s been shown in humans and in mice to be important in lupus is toll-like receptor signaling.” Most convincingly, one recent study showed that people who have a gain-of-function mutation in their TLR-7 gene get a spontaneous form of lupus.
These findings led Erika Darrah, PhD, and her colleague Dr. Antiochos to begin looking more deeply into which RNAs could be triggering this signaling pathway. “We started to think: Well, there is this sex bias. Could it be that women have unique RNAs that could potentially act as triggers for TLR-7 signaling?” Dr. Darrah said.
Dr. Darrah and Dr. Antiochos looked at publicly available genetic data to identify sex-biased sources of self-RNA containing TLR-7 ligands. Xist, they found, was chock full of them. “Every time we analyzed that data, no matter what filter we applied, Xist kept popping out over and over again as the most highly female skewed RNA, the RNA most likely to contain these TLR-7 binding motifs,” Dr. Darrah said. “We started to formulate the hypothesis that Xist was actually promoting responses that were dangerous and pathogenic in lupus.”
That finding led the team to conduct in-vitro experiments that showed different fragments of Xist can activate TLR-7, resulting in higher interferon production. Finally, they looked at blood and kidney cells from women with lupus and found that higher Xist expression correlated with more interferon production, and higher disease activity. “The more Xist, the sicker people were,” Dr. Darrah said.
Xist’s Other Functions
Xist was first studied in the 1990s, and most research has centered on its primary role in X-chromosome inactivation. A research group led by Kathrin Plath, PhD, at the University of California, Los Angeles, has been occupied for years with untangling exactly how Xist does what it does. “It’s a very clever RNA, right? It can silence the whole chromosome,” Dr. Plath said in an interview.
In 2021, Dr. Plath and her colleagues established in detail how Xist executes silencing, setting down pairs of molecules in specific spots along the chromosome and building huge protein clouds around them. “We worked on learning where Xist binds and what proteins it binds, drilling down to understand how these proteins and the RNA are coming together.”
Dr. Plath has long suspected that Xist has other functions besides X inactivation, and she and her colleagues are starting to identify them. Early this year they published the surprising finding that Xist can regulate gene expression in autosomes, or non–sex-linked chromosomes, “which it might well also do in cancer cells and lymphocytes,” Dr. Plath said. “And now there is this new evidence of an autoimmune function,” she said. “It’s a super exciting time.”
The different hypotheses surrounding Xist’s role in sex-biased autoimmunity aren’t mutually exclusive, Dr. Plath said. “There’s a tremendous enrichment of proteins occurring” during X inactivation, she said, supporting the Stanford team’s hypothesis that proteins are triggering autoimmunity. As for the Johns Hopkins researchers’ understanding that Xist RNA itself is the trigger, “I’m totally open to that,” she said. “Why can’t it be an autoantigen?”
The other model in the field, Dr. Plath noted, is the one proposed by Dr. Anguera — “that there’s [gene] escape from X-inactivation — that females have more escape expression, and that Xist is more dispersed in the lymphocytes [of patients with lupus]. In fact, Xist becoming a little dispersed might make it a better antigen. So I do think everything is possible.”
The plethora of new findings related to autoimmunity has caused Dr. Plath to consider redirecting her lab’s focus toward more translational work, “because we are obviously good at studying Xist.” Among the mysteries Dr. Plath would like to solve is how some genes manage to escape the Xist cloud.
What is needed, she said, is collaboration. “Everyone will come up with different ideas. So I think it’s good to have more people look at things together. Then the field will achieve a breakthrough treatment.”
Female bias in autoimmune disease can be profound, with nine females developing lupus for every male affected, and nearly twice that ratio seen in Sjögren disease.
For years, researchers have worked to determine the reasons for sex-linked differences in immune response and autoimmunity, with environmental factors, sex hormones, and X-chromosome inactivation — the process by which a second X chromosome is silenced — all seen as having roles.
More recently, different groups of researchers have homed in on a long noncoding RNA fragment called X-inactive specific transcript, or Xist, as a potential driver of sex bias in autoimmune disease. Xist, which occurs in female mammals, has been known since the 1990s as the master regulator of X-chromosome inactivation, the process by which the second X chromosome is silenced, averting a fatal double dose of X-linked genes.
The inactivation process, which scientists liken to wrapping the extra X with a fluffy cloud of proteins, occurs early in embryonic development. After its initial work silencing the X, Xist is produced throughout the female’s life, allowing X inactivation to be maintained.
But is it possible that Xist, and the many dozens of proteins it recruits to keep that extra X chromosome silent, can also provoke autoimmunity? This is the question that several teams of researchers have been grappling with, resulting in provocative findings and opening exciting new avenues of discovery.
Xist Protein Complexes Make Male Mice Vulnerable to Lupus
In February, researchers Howard Chang, MD, PhD, and Diana Dou, PhD, of Stanford University in Stanford, California, made worldwide news when they published results from an experiment using male mice genetically engineered to carry a non-silencing form of Xist on one of their chromosomes.
Xist acts like a scaffold, recruiting multiple protein complexes to help it do its job. Dr. Dou explained in an interview that her team has been eyeing suspiciously for years the dozens of proteins Xist recruits in the process of X-chromosome inactivation, many of which are known autoantigens.
When the mice were injected with pristane, a chemical that induces lupus-like autoimmunity in mice, the Xist-producing males developed symptoms at a rate similar to that of females, while wild-type male mice did not.
By using a male model, the scientists could determine whether Xist could cause an increased vulnerability for autoimmunity absent the influence of female hormones and development. “Everything else about the animal is male,” Dr. Dou commented. “You just add the formation of the Xist ribonucleoprotein particles — Xist RNA plus the associating proteins — to male cells that would not ordinarily have these particles. Is just having the particles present in these animals sufficient to increase their autoimmunity? This is what our paper showed: That just having expression of Xist, the presence of these Xist [ribonucleoproteins], is enough in permissive genetic backgrounds to invoke higher incidence and severity of autoimmune disease development in our pristane-induced lupus model.”
The Stanford group sees the Xist protein complex, which they have studied extensively, as a key to understanding how Xist might provoke autoimmunity. Nonetheless, Dr. Dou said, “It’s important to note that there are other contributing factors, which is why not all females develop autoimmunity, and we had very different results in our autoimmune-resistant mouse strain compared to the more autoimmune-prone strain. Xist is a factor, but many factors are required to subvert the checkpoints in immune balance and allow the progression to full-blown autoimmunity.”
Faulty X Inactivation and Gene Escape
The understanding that Xist might be implicated in autoimmune disease — and explain some of its female bias — is not new.
About a decade ago, Montserrat Anguera, PhD, a biologist at the University of Pennsylvania, Philadelphia, began looking at the relationship of X-chromosome inactivation, which by definition involves Xist, and lupus.
Dr. Anguera hypothesized that imperfect X inactivation allowed for greater escape of genes associated with immunity and autoimmunity. Studying patients with lupus, Dr. Anguera found that the silencing process was abnormal, allowing more of these genes to escape the silenced X — including toll-like receptor 7 (TLR-7) and other genes implicated in the pathogenesis of lupus.
“If you get increased expression of certain genes from the [silenced] X, like TLR-7, it can result in autoimmune disease,” Dr. Anguera said. “So what we think is that in the lupus patients, because the silencing is impacted, you’re going to have more expression happening from the inactive X. And then in conjunction with the active X, that’s going to throw off the dosage [of autoimmunity-linked genes]. You’re changing the dosage of genes, and that’s what’s critical.”
Even among patients with lupus whose symptoms are well controlled with medication, “if you look at their T cells and B cells, they still have messed up X inactivation,” Dr. Anguera said. “The Xist RNA that’s supposed to be tethered to the inactive X in a fluffy cloud is not localized, and instead is dispersed all over the nucleus.”
Dr. Anguera pointed out that autoimmune diseases are complex and can result from a combination of factors. “You also have a host of hormonal and environmental contributors, such as previous viral infections,” she said. And of course men can also develop lupus, meaning that the X chromosome cannot explain everything.
Dr. Anguera said that, while the findings by the Stanford scientists do not explain the full pathogenesis of lupus and related diseases, they still support a strong role for Xist in sex-biased autoimmune diseases. “It’s sort of another take on it,” she said.
Is It the Proteins, the RNA, or Both?
The Stanford team points to the proteins recruited by Xist in the process of X-chromosome inactivation as the likely trigger of autoimmunity. However, a group of researchers at Johns Hopkins University in Baltimore, Maryland, made the case in a 2022 paper that Xist RNA itself was dangerous. They found that numerous short RNA sequences within the Xist molecule serve as ligands for TLR-7. And TLR-7 ligation causes plasmacytoid dendritic cells to overproduce type 1 interferon, a classic hallmark of lupus.
“Within rheumatology, the diseases that tend to be most female biased are the ones that are antibody positive and have this presence of upregulated interferon,” explained Brendan Antiochos, MD. “Lupus is an example of that. Sjögren’s syndrome is another. So there’s always been this quest to want to understand the mechanisms that explain why women would have more autoimmunity. And are there specific pathways which could contribute? One of the key pathways that’s been shown in humans and in mice to be important in lupus is toll-like receptor signaling.” Most convincingly, one recent study showed that people who have a gain-of-function mutation in their TLR-7 gene get a spontaneous form of lupus.
These findings led Erika Darrah, PhD, and her colleague Dr. Antiochos to begin looking more deeply into which RNAs could be triggering this signaling pathway. “We started to think: Well, there is this sex bias. Could it be that women have unique RNAs that could potentially act as triggers for TLR-7 signaling?” Dr. Darrah said.
Dr. Darrah and Dr. Antiochos looked at publicly available genetic data to identify sex-biased sources of self-RNA containing TLR-7 ligands. Xist, they found, was chock full of them. “Every time we analyzed that data, no matter what filter we applied, Xist kept popping out over and over again as the most highly female skewed RNA, the RNA most likely to contain these TLR-7 binding motifs,” Dr. Darrah said. “We started to formulate the hypothesis that Xist was actually promoting responses that were dangerous and pathogenic in lupus.”
That finding led the team to conduct in-vitro experiments that showed different fragments of Xist can activate TLR-7, resulting in higher interferon production. Finally, they looked at blood and kidney cells from women with lupus and found that higher Xist expression correlated with more interferon production, and higher disease activity. “The more Xist, the sicker people were,” Dr. Darrah said.
Xist’s Other Functions
Xist was first studied in the 1990s, and most research has centered on its primary role in X-chromosome inactivation. A research group led by Kathrin Plath, PhD, at the University of California, Los Angeles, has been occupied for years with untangling exactly how Xist does what it does. “It’s a very clever RNA, right? It can silence the whole chromosome,” Dr. Plath said in an interview.
In 2021, Dr. Plath and her colleagues established in detail how Xist executes silencing, setting down pairs of molecules in specific spots along the chromosome and building huge protein clouds around them. “We worked on learning where Xist binds and what proteins it binds, drilling down to understand how these proteins and the RNA are coming together.”
Dr. Plath has long suspected that Xist has other functions besides X inactivation, and she and her colleagues are starting to identify them. Early this year they published the surprising finding that Xist can regulate gene expression in autosomes, or non–sex-linked chromosomes, “which it might well also do in cancer cells and lymphocytes,” Dr. Plath said. “And now there is this new evidence of an autoimmune function,” she said. “It’s a super exciting time.”
The different hypotheses surrounding Xist’s role in sex-biased autoimmunity aren’t mutually exclusive, Dr. Plath said. “There’s a tremendous enrichment of proteins occurring” during X inactivation, she said, supporting the Stanford team’s hypothesis that proteins are triggering autoimmunity. As for the Johns Hopkins researchers’ understanding that Xist RNA itself is the trigger, “I’m totally open to that,” she said. “Why can’t it be an autoantigen?”
The other model in the field, Dr. Plath noted, is the one proposed by Dr. Anguera — “that there’s [gene] escape from X-inactivation — that females have more escape expression, and that Xist is more dispersed in the lymphocytes [of patients with lupus]. In fact, Xist becoming a little dispersed might make it a better antigen. So I do think everything is possible.”
The plethora of new findings related to autoimmunity has caused Dr. Plath to consider redirecting her lab’s focus toward more translational work, “because we are obviously good at studying Xist.” Among the mysteries Dr. Plath would like to solve is how some genes manage to escape the Xist cloud.
What is needed, she said, is collaboration. “Everyone will come up with different ideas. So I think it’s good to have more people look at things together. Then the field will achieve a breakthrough treatment.”
Female bias in autoimmune disease can be profound, with nine females developing lupus for every male affected, and nearly twice that ratio seen in Sjögren disease.
For years, researchers have worked to determine the reasons for sex-linked differences in immune response and autoimmunity, with environmental factors, sex hormones, and X-chromosome inactivation — the process by which a second X chromosome is silenced — all seen as having roles.
More recently, different groups of researchers have homed in on a long noncoding RNA fragment called X-inactive specific transcript, or Xist, as a potential driver of sex bias in autoimmune disease. Xist, which occurs in female mammals, has been known since the 1990s as the master regulator of X-chromosome inactivation, the process by which the second X chromosome is silenced, averting a fatal double dose of X-linked genes.
The inactivation process, which scientists liken to wrapping the extra X with a fluffy cloud of proteins, occurs early in embryonic development. After its initial work silencing the X, Xist is produced throughout the female’s life, allowing X inactivation to be maintained.
But is it possible that Xist, and the many dozens of proteins it recruits to keep that extra X chromosome silent, can also provoke autoimmunity? This is the question that several teams of researchers have been grappling with, resulting in provocative findings and opening exciting new avenues of discovery.
Xist Protein Complexes Make Male Mice Vulnerable to Lupus
In February, researchers Howard Chang, MD, PhD, and Diana Dou, PhD, of Stanford University in Stanford, California, made worldwide news when they published results from an experiment using male mice genetically engineered to carry a non-silencing form of Xist on one of their chromosomes.
Xist acts like a scaffold, recruiting multiple protein complexes to help it do its job. Dr. Dou explained in an interview that her team has been eyeing suspiciously for years the dozens of proteins Xist recruits in the process of X-chromosome inactivation, many of which are known autoantigens.
When the mice were injected with pristane, a chemical that induces lupus-like autoimmunity in mice, the Xist-producing males developed symptoms at a rate similar to that of females, while wild-type male mice did not.
By using a male model, the scientists could determine whether Xist could cause an increased vulnerability for autoimmunity absent the influence of female hormones and development. “Everything else about the animal is male,” Dr. Dou commented. “You just add the formation of the Xist ribonucleoprotein particles — Xist RNA plus the associating proteins — to male cells that would not ordinarily have these particles. Is just having the particles present in these animals sufficient to increase their autoimmunity? This is what our paper showed: That just having expression of Xist, the presence of these Xist [ribonucleoproteins], is enough in permissive genetic backgrounds to invoke higher incidence and severity of autoimmune disease development in our pristane-induced lupus model.”
The Stanford group sees the Xist protein complex, which they have studied extensively, as a key to understanding how Xist might provoke autoimmunity. Nonetheless, Dr. Dou said, “It’s important to note that there are other contributing factors, which is why not all females develop autoimmunity, and we had very different results in our autoimmune-resistant mouse strain compared to the more autoimmune-prone strain. Xist is a factor, but many factors are required to subvert the checkpoints in immune balance and allow the progression to full-blown autoimmunity.”
Faulty X Inactivation and Gene Escape
The understanding that Xist might be implicated in autoimmune disease — and explain some of its female bias — is not new.
About a decade ago, Montserrat Anguera, PhD, a biologist at the University of Pennsylvania, Philadelphia, began looking at the relationship of X-chromosome inactivation, which by definition involves Xist, and lupus.
Dr. Anguera hypothesized that imperfect X inactivation allowed for greater escape of genes associated with immunity and autoimmunity. Studying patients with lupus, Dr. Anguera found that the silencing process was abnormal, allowing more of these genes to escape the silenced X — including toll-like receptor 7 (TLR-7) and other genes implicated in the pathogenesis of lupus.
“If you get increased expression of certain genes from the [silenced] X, like TLR-7, it can result in autoimmune disease,” Dr. Anguera said. “So what we think is that in the lupus patients, because the silencing is impacted, you’re going to have more expression happening from the inactive X. And then in conjunction with the active X, that’s going to throw off the dosage [of autoimmunity-linked genes]. You’re changing the dosage of genes, and that’s what’s critical.”
Even among patients with lupus whose symptoms are well controlled with medication, “if you look at their T cells and B cells, they still have messed up X inactivation,” Dr. Anguera said. “The Xist RNA that’s supposed to be tethered to the inactive X in a fluffy cloud is not localized, and instead is dispersed all over the nucleus.”
Dr. Anguera pointed out that autoimmune diseases are complex and can result from a combination of factors. “You also have a host of hormonal and environmental contributors, such as previous viral infections,” she said. And of course men can also develop lupus, meaning that the X chromosome cannot explain everything.
Dr. Anguera said that, while the findings by the Stanford scientists do not explain the full pathogenesis of lupus and related diseases, they still support a strong role for Xist in sex-biased autoimmune diseases. “It’s sort of another take on it,” she said.
Is It the Proteins, the RNA, or Both?
The Stanford team points to the proteins recruited by Xist in the process of X-chromosome inactivation as the likely trigger of autoimmunity. However, a group of researchers at Johns Hopkins University in Baltimore, Maryland, made the case in a 2022 paper that Xist RNA itself was dangerous. They found that numerous short RNA sequences within the Xist molecule serve as ligands for TLR-7. And TLR-7 ligation causes plasmacytoid dendritic cells to overproduce type 1 interferon, a classic hallmark of lupus.
“Within rheumatology, the diseases that tend to be most female biased are the ones that are antibody positive and have this presence of upregulated interferon,” explained Brendan Antiochos, MD. “Lupus is an example of that. Sjögren’s syndrome is another. So there’s always been this quest to want to understand the mechanisms that explain why women would have more autoimmunity. And are there specific pathways which could contribute? One of the key pathways that’s been shown in humans and in mice to be important in lupus is toll-like receptor signaling.” Most convincingly, one recent study showed that people who have a gain-of-function mutation in their TLR-7 gene get a spontaneous form of lupus.
These findings led Erika Darrah, PhD, and her colleague Dr. Antiochos to begin looking more deeply into which RNAs could be triggering this signaling pathway. “We started to think: Well, there is this sex bias. Could it be that women have unique RNAs that could potentially act as triggers for TLR-7 signaling?” Dr. Darrah said.
Dr. Darrah and Dr. Antiochos looked at publicly available genetic data to identify sex-biased sources of self-RNA containing TLR-7 ligands. Xist, they found, was chock full of them. “Every time we analyzed that data, no matter what filter we applied, Xist kept popping out over and over again as the most highly female skewed RNA, the RNA most likely to contain these TLR-7 binding motifs,” Dr. Darrah said. “We started to formulate the hypothesis that Xist was actually promoting responses that were dangerous and pathogenic in lupus.”
That finding led the team to conduct in-vitro experiments that showed different fragments of Xist can activate TLR-7, resulting in higher interferon production. Finally, they looked at blood and kidney cells from women with lupus and found that higher Xist expression correlated with more interferon production, and higher disease activity. “The more Xist, the sicker people were,” Dr. Darrah said.
Xist’s Other Functions
Xist was first studied in the 1990s, and most research has centered on its primary role in X-chromosome inactivation. A research group led by Kathrin Plath, PhD, at the University of California, Los Angeles, has been occupied for years with untangling exactly how Xist does what it does. “It’s a very clever RNA, right? It can silence the whole chromosome,” Dr. Plath said in an interview.
In 2021, Dr. Plath and her colleagues established in detail how Xist executes silencing, setting down pairs of molecules in specific spots along the chromosome and building huge protein clouds around them. “We worked on learning where Xist binds and what proteins it binds, drilling down to understand how these proteins and the RNA are coming together.”
Dr. Plath has long suspected that Xist has other functions besides X inactivation, and she and her colleagues are starting to identify them. Early this year they published the surprising finding that Xist can regulate gene expression in autosomes, or non–sex-linked chromosomes, “which it might well also do in cancer cells and lymphocytes,” Dr. Plath said. “And now there is this new evidence of an autoimmune function,” she said. “It’s a super exciting time.”
The different hypotheses surrounding Xist’s role in sex-biased autoimmunity aren’t mutually exclusive, Dr. Plath said. “There’s a tremendous enrichment of proteins occurring” during X inactivation, she said, supporting the Stanford team’s hypothesis that proteins are triggering autoimmunity. As for the Johns Hopkins researchers’ understanding that Xist RNA itself is the trigger, “I’m totally open to that,” she said. “Why can’t it be an autoantigen?”
The other model in the field, Dr. Plath noted, is the one proposed by Dr. Anguera — “that there’s [gene] escape from X-inactivation — that females have more escape expression, and that Xist is more dispersed in the lymphocytes [of patients with lupus]. In fact, Xist becoming a little dispersed might make it a better antigen. So I do think everything is possible.”
The plethora of new findings related to autoimmunity has caused Dr. Plath to consider redirecting her lab’s focus toward more translational work, “because we are obviously good at studying Xist.” Among the mysteries Dr. Plath would like to solve is how some genes manage to escape the Xist cloud.
What is needed, she said, is collaboration. “Everyone will come up with different ideas. So I think it’s good to have more people look at things together. Then the field will achieve a breakthrough treatment.”
Regular Exercise Linked to Better Sleep
TOPLINE:
Over time, exercising at least twice a week is associated with significantly fewer insomnia symptoms and better sleep duration, new research shows.
METHODOLOGY:
- The study included 4339 adults aged 39-67 years (48% men) from 21 centers in nine countries participating in the third follow-up to the European Community Respiratory Health Survey (ECRHS III).
- Participants responded to questions about physical activity, insomnia symptoms, sleep duration, and daytime sleepiness at 10-year follow-up.
- Being “physically active” was defined as exercising with a frequency of at least twice a week for ≥ 1 hour per week.
- The main outcome measures were insomnia, sleep time, and daytime sleepiness in relation to physical activity.
TAKEAWAY:
- From baseline to follow-up, 37% of participants were persistently inactive, 25% were persistently active, 20% became inactive, and 18% became active.
- After adjustment for age, sex, body mass index, smoking history, and study center, persistently active participants were less likely to report difficulties with sleep initiation (adjusted odds ratio [aOR], 0.60; 95% CI, 0.45-0.78), with short sleep duration of ≤ 6 hours/night (aOR, 0.71; 95% CI, 0.59-0.85) and long sleep of ≥ 9 hours/night (aOR, 0.53; 95% CI, 0.33-0.84), compared with persistently nonactive subjects.
- Daytime sleepiness and difficulties maintaining sleep were found to be unrelated to physical activity status.
IN PRACTICE:
“This study has a long follow-up period (10 years) and indicates strongly that consistency in physical activity might be an important factor in optimizing sleep duration and reducing the symptoms of insomnia,” the authors wrote.
SOURCE:
Erla Björnsdóttir, of the Department of Psychology, Reykjavik University, Reykjavik, Iceland, was the co-senior author and corresponding author of the study. It was published online on March 25 in BMJ Open.
LIMITATIONS:
It’s unclear whether individuals who were active at both timepoints had been continuously physically active throughout the study period or only at those two timepoints. Sleep variables were available only at follow-up and were all subjectively reported, meaning the associations between physical activity and sleep may not be longitudinal. Residual confounders (eg, mental health and musculoskeletal disorders or chronic pain) that can influence both sleep and exercise were not explored.
DISCLOSURES:
Financial support for ECRHS III was provided by the National Health and Medical Research Council (Australia); Antwerp South, Antwerp City: Research Foundation Flanders (Belgium); Estonian Ministry of Education (Estonia); and other international agencies. Additional sources of funding were listed on the original paper. The authors reported no relevant financial relationships.
A version of this article appeared on Medscape.com.
TOPLINE:
Over time, exercising at least twice a week is associated with significantly fewer insomnia symptoms and better sleep duration, new research shows.
METHODOLOGY:
- The study included 4339 adults aged 39-67 years (48% men) from 21 centers in nine countries participating in the third follow-up to the European Community Respiratory Health Survey (ECRHS III).
- Participants responded to questions about physical activity, insomnia symptoms, sleep duration, and daytime sleepiness at 10-year follow-up.
- Being “physically active” was defined as exercising with a frequency of at least twice a week for ≥ 1 hour per week.
- The main outcome measures were insomnia, sleep time, and daytime sleepiness in relation to physical activity.
TAKEAWAY:
- From baseline to follow-up, 37% of participants were persistently inactive, 25% were persistently active, 20% became inactive, and 18% became active.
- After adjustment for age, sex, body mass index, smoking history, and study center, persistently active participants were less likely to report difficulties with sleep initiation (adjusted odds ratio [aOR], 0.60; 95% CI, 0.45-0.78), with short sleep duration of ≤ 6 hours/night (aOR, 0.71; 95% CI, 0.59-0.85) and long sleep of ≥ 9 hours/night (aOR, 0.53; 95% CI, 0.33-0.84), compared with persistently nonactive subjects.
- Daytime sleepiness and difficulties maintaining sleep were found to be unrelated to physical activity status.
IN PRACTICE:
“This study has a long follow-up period (10 years) and indicates strongly that consistency in physical activity might be an important factor in optimizing sleep duration and reducing the symptoms of insomnia,” the authors wrote.
SOURCE:
Erla Björnsdóttir, of the Department of Psychology, Reykjavik University, Reykjavik, Iceland, was the co-senior author and corresponding author of the study. It was published online on March 25 in BMJ Open.
LIMITATIONS:
It’s unclear whether individuals who were active at both timepoints had been continuously physically active throughout the study period or only at those two timepoints. Sleep variables were available only at follow-up and were all subjectively reported, meaning the associations between physical activity and sleep may not be longitudinal. Residual confounders (eg, mental health and musculoskeletal disorders or chronic pain) that can influence both sleep and exercise were not explored.
DISCLOSURES:
Financial support for ECRHS III was provided by the National Health and Medical Research Council (Australia); Antwerp South, Antwerp City: Research Foundation Flanders (Belgium); Estonian Ministry of Education (Estonia); and other international agencies. Additional sources of funding were listed on the original paper. The authors reported no relevant financial relationships.
A version of this article appeared on Medscape.com.
TOPLINE:
Over time, exercising at least twice a week is associated with significantly fewer insomnia symptoms and better sleep duration, new research shows.
METHODOLOGY:
- The study included 4339 adults aged 39-67 years (48% men) from 21 centers in nine countries participating in the third follow-up to the European Community Respiratory Health Survey (ECRHS III).
- Participants responded to questions about physical activity, insomnia symptoms, sleep duration, and daytime sleepiness at 10-year follow-up.
- Being “physically active” was defined as exercising with a frequency of at least twice a week for ≥ 1 hour per week.
- The main outcome measures were insomnia, sleep time, and daytime sleepiness in relation to physical activity.
TAKEAWAY:
- From baseline to follow-up, 37% of participants were persistently inactive, 25% were persistently active, 20% became inactive, and 18% became active.
- After adjustment for age, sex, body mass index, smoking history, and study center, persistently active participants were less likely to report difficulties with sleep initiation (adjusted odds ratio [aOR], 0.60; 95% CI, 0.45-0.78), with short sleep duration of ≤ 6 hours/night (aOR, 0.71; 95% CI, 0.59-0.85) and long sleep of ≥ 9 hours/night (aOR, 0.53; 95% CI, 0.33-0.84), compared with persistently nonactive subjects.
- Daytime sleepiness and difficulties maintaining sleep were found to be unrelated to physical activity status.
IN PRACTICE:
“This study has a long follow-up period (10 years) and indicates strongly that consistency in physical activity might be an important factor in optimizing sleep duration and reducing the symptoms of insomnia,” the authors wrote.
SOURCE:
Erla Björnsdóttir, of the Department of Psychology, Reykjavik University, Reykjavik, Iceland, was the co-senior author and corresponding author of the study. It was published online on March 25 in BMJ Open.
LIMITATIONS:
It’s unclear whether individuals who were active at both timepoints had been continuously physically active throughout the study period or only at those two timepoints. Sleep variables were available only at follow-up and were all subjectively reported, meaning the associations between physical activity and sleep may not be longitudinal. Residual confounders (eg, mental health and musculoskeletal disorders or chronic pain) that can influence both sleep and exercise were not explored.
DISCLOSURES:
Financial support for ECRHS III was provided by the National Health and Medical Research Council (Australia); Antwerp South, Antwerp City: Research Foundation Flanders (Belgium); Estonian Ministry of Education (Estonia); and other international agencies. Additional sources of funding were listed on the original paper. The authors reported no relevant financial relationships.
A version of this article appeared on Medscape.com.
Visionary Surgery Saved Pitcher’s Arm. Now Even Children Get It
In 1974, Tommy John of the Los Angeles Dodgers was 31 and a 12-year veteran of Major League Baseball when he became the unwitting vanguard of a revolution in baseball and orthopedics. Fifty years later, Mr. John might not be a candidate for the latest advances to a procedure that bears his name.
The southpaw pitcher had faced the abrupt end of his career when, after one fateful delivery, he found himself unable to throw to home. So he took a gamble on the surgical equivalent of a Hail Mary: the reconstruction of a torn ligament in his pitching elbow.
The experiment was a wild success. Mr. John pitched— and better than he had before — for another 14 seasons, retiring in 1989 at the age of 46. How much better? After the surgery, he tallied three 20-win seasons compared with none before the operation, and he finished among the top five vote-getters for the annual Cy Young Award three times. He was named an All-Star once before the surgery and three times after.
The triumph notwithstanding, Tommy John now cautions against Tommy John surgery. What’s given him and clinicians pause is a trend in recent years of ever-younger athletes who undergo the procedure.
Along with the surgical improvements in repairing a torn ulnar collateral ligament (UCL) is a demographic shift toward school-aged athletes who get it. By 2014, one study concluded that 67.4% of UCL reconstruction surgeries were performed on athletes between 16 and 20 years of age. Some patients are still in Little League when they undergo the procedure.
Experts say these athletes have weakened their UCLs through overuse. They disagree on whether to call it an “epidemic,” but if it is, “the vaccine is awareness” against throwing too hard and too often, said Eric Makhni, MD, an orthopedic surgeon at Henry Ford Health in Detroit.
From Career-Ending to Routine
Mr. John’s entry into baseball and orthopedic lore was initially slow, but the trickle turned into a tide. After Frank Jobe, MD, swapped a healthy tendon from John’s right wrist for his worn and torn left UCL on September 25, 1974, he didn’t perform his second surgery for another 1194 days. By the time “Tommy John surgery” became a recognized phrase, Mr. John was still active but only 14 professional baseball players had undergone the operation.
Prior to the start of spring training this year, an oft-cited database listed 366 pro players who’d undergone the operation.
“Before Tommy John, that was a career-ending injury,” said Grant E. Garrigues, MD, an orthopedic surgeon at Midwest Orthopaedics at RUSH in Chicago, who called Mr. John “a pure revolutionary.”
Tommy John surgery is “the only one that I can think of that is named after the patient rather than the doctor who first did it,” said Patrick McCulloch, MD, an orthopedic surgeon in Houston and a team physician for the Astros.
Dr. McCulloch, who performs about 25 UCL repairs a year, said that by recent estimates, one-third of pro pitchers had had some sort of surgical repair. He hesitated to call the increasing number of operations an epidemic but acknowledged that the ingredients exist for more elbow trauma among baseball players.
“More people are playing more often, and people are bigger and stronger and throwing harder,” he said.
Either way, Dr. McCulloch said, “the procedure is a victim of its own success” because it is “just done phenomenally well.”
The surgery is now commonplace — perhaps too commonplace, said David W. Altchek, MD, attending surgeon and co-chief emeritus at Hospital for Special Surgery in New York City.
Dr. Altchek played a key role in the popularity of the operation. Twenty-two years after Mr. John’s surgery, he helped develop a variation of the procedure called the docking technique.
Whereas Dr. Jobe sutured Mr. John’s replacement graft to itself, “we developed a different way of tying it over a bone bridge, which was more secure and more easy to tension,” Dr. Altchek explained.
The advance meant less drilling into bone and enabled surgeons to avoid moving a problem-free ulnar nerve or removing the flexor-pronator muscle that protects the elbow from stress. “The trauma of the surgery is significantly less,” he said. “We just made it a lot easier very quickly,” cutting the surgery time from 2 hours to 30-40 minutes.
Maybe the surgery became too easy, said Dr. Altchek, who estimates he has done 2000 of them over the past 30 years. “I don’t want to condemn my colleagues, but there are a lot of people doing the surgery,” he said. “And not a lot of people are doing a lot of them, and they don’t know the nuances of doing the surgery.”
The older procedures are known as the “full Tommy John”; each has a 12- to 18-month healing process, with a success rate of 80%-85%. Pitchers typically sit out a season while recovering.
Brandon Erickson, MD, an orthopedic surgeon at Rothman Orthopaedic Institute in New York City, said that in younger patients he has recently turned more often to the suture of the future: an internal brace that provides a repair rather than reconstruction.
The procedure, pioneered by Felix H. Savoie III, MD, the Ray J. Haddad Professor of Orthopaedics at Tulane University School of Medicine in New Orleans, and Jeffrey R. Dugas, MD, of Andrews Sports Medicine & Orthopaedic Center in Birmingham, Alabama, uses collagen-coated tape that looks like a shoelace and provides a scaffold that Dr. McCulloch said “is inductive to healing and growth of ligament tissue.”
The brace is intended for an “overhead” athlete (mostly baseball players but also javelin throwers and gymnasts) whose UCL is torn on only one side but is otherwise in good shape. In a pitcher the same age as Mr. John was when Dr. Jobe performed the first procedure, “that ligament may not be of very good quality,” Dr. McCulloch said. “It may have thickened. It may have calcifications.” But for a high-school junior with aspirations to pitch in college or beyond without “way too many miles on the elbow,” the approach is a good fit. The healing process is as little as 6 months.
“The ones who have a good ligament are very likely to do well,” said Dr. Erickson, an assistant team doctor for the Philadelphia Phillies.
“If the patient’s ligament is generally ‘good’ with only a tear, the InternalBrace procedure may be used to repair the native ligament. On the other end of the spectrum, if the patient’s ligament is torn and degenerative the surgeon may opt to do a UCL reconstruction using an auto or allograft — ie, Tommy John surgery,” Allen Holowecky, senior product manager of Arthrex of Naples, Florida, the maker of the InternalBrace, told this news organization. “Before UCL repair, Tommy John surgery was the only real treatment option. We tend to see repairs done on younger patients since their ligament hasn’t seen years of use-damage.”
Calls for Caution
Tommy John III wanted to play baseball like his dad until near-fatal complications from shoulder surgery altered his path. He was drawn to chiropractic and consults on injury prevention. “All surgeries and all medical interventions are cut first, ask questions later,” he said. “I was born with that.”
He saw his dad’s slow, heroic comeback from the surgery and described him as the perfect candidate for Dr. Jobe’s experiment. Tommy John spent his recovery time squeezing Silly Putty and throwing tennis balls. “He was willing to do anything necessary. He wanted to throw. That was his brush.” When the son was recovering from his own injury, “he said, ‘Learn the knuckleball.’ I said, ‘I don’t want to. I’ve reached my point.’ ”
He said he tells young patients with UCL injuries to rest. But instead “we have year-round sports with the promise that the more you play, the better,” he said. “They’re over-activitied.”
According to the American Academy of Orthopaedic Surgeons, 6.4 million children and adolescents in the United States played organized baseball in 2022, down from 11.5 million in 2014. Nearly half of pitchers played in a league with no maximum pitch counts, and 43.5% pitched on consecutive days, the group said.
How many UCL repair or reconstruction surgeries are performed on youth athletes each year is unclear. A 2019 study, however, found that although baseball injuries decreased between 2006 and 2016, the elbow was “the only location of injury that saw an increase.”
Dr. Garrigues said some parents of throwing athletes have asked about prophylactic Tommy John surgery for their children. He said it shouldn’t apply to pitchers.
“People have taken it a little too far,” he said. Dr. Garrigues and others argue against children throwing weighted balls when coming back from surgery. Instead, “we’re shutting them down,” he said.
Throwing any pitch is an act of violence on the body, Dr. Garrigues said, with the elbow taking the final brunt of the force. “These pitchers are functioning at the absolute limits of what the human body can take,” he said. “There’s only so many bullets in a gun,” which is why pitchers often feel the twinge of a torn UCL on a routine pitch.
Dr. Makhni suggested cross-training for pitchers in the off-season instead of playing baseball year-round. “If you play soccer, your footwork is going to be better,” he said.
“Kids shouldn’t be doing this all year round,” said Rebecca Carl, MD, associate professor of pediatrics at Northwestern University Feinberg School of Medicine in Chicago. “We are recommending that kids take 2 or 3 months off.” In the off-season, she urges them to strengthen their backs and cores.
Such advice can “feel like a bombshell,” said Dr. Carl, who chairs the Council on Sports Medicine and Fitness for the American Academy of Pediatrics. ‘Some started at a very young age. They go to camps. If I say to a teenager, ‘If you do this, I can keep you from getting injured,’ they think, ‘I won’t be injured.’” Most parents, however, understand the risk of “doing too much, too soon.”
Justin Orenduff, a former pitching prospect until his arm blew out, has made a career teaching head-to-toe pitching mechanics. He founded DVS Baseball, which uses software to teach pitchers how to properly use every muscle, starting with the orientation of the back foot. He, too, argues against pitching year-round. “Everyone on that travel team expects to get their fair share of playing time,” he said. “It just never stops.”
Organized baseball is paying attention. It has come up with the Pitch Smart program that gives maximum pitch counts for young players, but experts said children often get around that by belonging to several leagues.
Dr. Altchek said some surgeons have added platelet-rich plasma, stem cells, and bone marrow during surgery to quicken the slow healing time from UCL replacement. But he said, “it has to heal. Can you speed up biology?”
Dr. McCulloch said that, all the advances in Tommy John surgery aside, “the next frontier is really trying to crack the code on prevention.”
A version of this article first appeared on Medscape.com.
In 1974, Tommy John of the Los Angeles Dodgers was 31 and a 12-year veteran of Major League Baseball when he became the unwitting vanguard of a revolution in baseball and orthopedics. Fifty years later, Mr. John might not be a candidate for the latest advances to a procedure that bears his name.
The southpaw pitcher had faced the abrupt end of his career when, after one fateful delivery, he found himself unable to throw to home. So he took a gamble on the surgical equivalent of a Hail Mary: the reconstruction of a torn ligament in his pitching elbow.
The experiment was a wild success. Mr. John pitched— and better than he had before — for another 14 seasons, retiring in 1989 at the age of 46. How much better? After the surgery, he tallied three 20-win seasons compared with none before the operation, and he finished among the top five vote-getters for the annual Cy Young Award three times. He was named an All-Star once before the surgery and three times after.
The triumph notwithstanding, Tommy John now cautions against Tommy John surgery. What’s given him and clinicians pause is a trend in recent years of ever-younger athletes who undergo the procedure.
Along with the surgical improvements in repairing a torn ulnar collateral ligament (UCL) is a demographic shift toward school-aged athletes who get it. By 2014, one study concluded that 67.4% of UCL reconstruction surgeries were performed on athletes between 16 and 20 years of age. Some patients are still in Little League when they undergo the procedure.
Experts say these athletes have weakened their UCLs through overuse. They disagree on whether to call it an “epidemic,” but if it is, “the vaccine is awareness” against throwing too hard and too often, said Eric Makhni, MD, an orthopedic surgeon at Henry Ford Health in Detroit.
From Career-Ending to Routine
Mr. John’s entry into baseball and orthopedic lore was initially slow, but the trickle turned into a tide. After Frank Jobe, MD, swapped a healthy tendon from John’s right wrist for his worn and torn left UCL on September 25, 1974, he didn’t perform his second surgery for another 1194 days. By the time “Tommy John surgery” became a recognized phrase, Mr. John was still active but only 14 professional baseball players had undergone the operation.
Prior to the start of spring training this year, an oft-cited database listed 366 pro players who’d undergone the operation.
“Before Tommy John, that was a career-ending injury,” said Grant E. Garrigues, MD, an orthopedic surgeon at Midwest Orthopaedics at RUSH in Chicago, who called Mr. John “a pure revolutionary.”
Tommy John surgery is “the only one that I can think of that is named after the patient rather than the doctor who first did it,” said Patrick McCulloch, MD, an orthopedic surgeon in Houston and a team physician for the Astros.
Dr. McCulloch, who performs about 25 UCL repairs a year, said that by recent estimates, one-third of pro pitchers had had some sort of surgical repair. He hesitated to call the increasing number of operations an epidemic but acknowledged that the ingredients exist for more elbow trauma among baseball players.
“More people are playing more often, and people are bigger and stronger and throwing harder,” he said.
Either way, Dr. McCulloch said, “the procedure is a victim of its own success” because it is “just done phenomenally well.”
The surgery is now commonplace — perhaps too commonplace, said David W. Altchek, MD, attending surgeon and co-chief emeritus at Hospital for Special Surgery in New York City.
Dr. Altchek played a key role in the popularity of the operation. Twenty-two years after Mr. John’s surgery, he helped develop a variation of the procedure called the docking technique.
Whereas Dr. Jobe sutured Mr. John’s replacement graft to itself, “we developed a different way of tying it over a bone bridge, which was more secure and more easy to tension,” Dr. Altchek explained.
The advance meant less drilling into bone and enabled surgeons to avoid moving a problem-free ulnar nerve or removing the flexor-pronator muscle that protects the elbow from stress. “The trauma of the surgery is significantly less,” he said. “We just made it a lot easier very quickly,” cutting the surgery time from 2 hours to 30-40 minutes.
Maybe the surgery became too easy, said Dr. Altchek, who estimates he has done 2000 of them over the past 30 years. “I don’t want to condemn my colleagues, but there are a lot of people doing the surgery,” he said. “And not a lot of people are doing a lot of them, and they don’t know the nuances of doing the surgery.”
The older procedures are known as the “full Tommy John”; each has a 12- to 18-month healing process, with a success rate of 80%-85%. Pitchers typically sit out a season while recovering.
Brandon Erickson, MD, an orthopedic surgeon at Rothman Orthopaedic Institute in New York City, said that in younger patients he has recently turned more often to the suture of the future: an internal brace that provides a repair rather than reconstruction.
The procedure, pioneered by Felix H. Savoie III, MD, the Ray J. Haddad Professor of Orthopaedics at Tulane University School of Medicine in New Orleans, and Jeffrey R. Dugas, MD, of Andrews Sports Medicine & Orthopaedic Center in Birmingham, Alabama, uses collagen-coated tape that looks like a shoelace and provides a scaffold that Dr. McCulloch said “is inductive to healing and growth of ligament tissue.”
The brace is intended for an “overhead” athlete (mostly baseball players but also javelin throwers and gymnasts) whose UCL is torn on only one side but is otherwise in good shape. In a pitcher the same age as Mr. John was when Dr. Jobe performed the first procedure, “that ligament may not be of very good quality,” Dr. McCulloch said. “It may have thickened. It may have calcifications.” But for a high-school junior with aspirations to pitch in college or beyond without “way too many miles on the elbow,” the approach is a good fit. The healing process is as little as 6 months.
“The ones who have a good ligament are very likely to do well,” said Dr. Erickson, an assistant team doctor for the Philadelphia Phillies.
“If the patient’s ligament is generally ‘good’ with only a tear, the InternalBrace procedure may be used to repair the native ligament. On the other end of the spectrum, if the patient’s ligament is torn and degenerative the surgeon may opt to do a UCL reconstruction using an auto or allograft — ie, Tommy John surgery,” Allen Holowecky, senior product manager of Arthrex of Naples, Florida, the maker of the InternalBrace, told this news organization. “Before UCL repair, Tommy John surgery was the only real treatment option. We tend to see repairs done on younger patients since their ligament hasn’t seen years of use-damage.”
Calls for Caution
Tommy John III wanted to play baseball like his dad until near-fatal complications from shoulder surgery altered his path. He was drawn to chiropractic and consults on injury prevention. “All surgeries and all medical interventions are cut first, ask questions later,” he said. “I was born with that.”
He saw his dad’s slow, heroic comeback from the surgery and described him as the perfect candidate for Dr. Jobe’s experiment. Tommy John spent his recovery time squeezing Silly Putty and throwing tennis balls. “He was willing to do anything necessary. He wanted to throw. That was his brush.” When the son was recovering from his own injury, “he said, ‘Learn the knuckleball.’ I said, ‘I don’t want to. I’ve reached my point.’ ”
He said he tells young patients with UCL injuries to rest. But instead “we have year-round sports with the promise that the more you play, the better,” he said. “They’re over-activitied.”
According to the American Academy of Orthopaedic Surgeons, 6.4 million children and adolescents in the United States played organized baseball in 2022, down from 11.5 million in 2014. Nearly half of pitchers played in a league with no maximum pitch counts, and 43.5% pitched on consecutive days, the group said.
How many UCL repair or reconstruction surgeries are performed on youth athletes each year is unclear. A 2019 study, however, found that although baseball injuries decreased between 2006 and 2016, the elbow was “the only location of injury that saw an increase.”
Dr. Garrigues said some parents of throwing athletes have asked about prophylactic Tommy John surgery for their children. He said it shouldn’t apply to pitchers.
“People have taken it a little too far,” he said. Dr. Garrigues and others argue against children throwing weighted balls when coming back from surgery. Instead, “we’re shutting them down,” he said.
Throwing any pitch is an act of violence on the body, Dr. Garrigues said, with the elbow taking the final brunt of the force. “These pitchers are functioning at the absolute limits of what the human body can take,” he said. “There’s only so many bullets in a gun,” which is why pitchers often feel the twinge of a torn UCL on a routine pitch.
Dr. Makhni suggested cross-training for pitchers in the off-season instead of playing baseball year-round. “If you play soccer, your footwork is going to be better,” he said.
“Kids shouldn’t be doing this all year round,” said Rebecca Carl, MD, associate professor of pediatrics at Northwestern University Feinberg School of Medicine in Chicago. “We are recommending that kids take 2 or 3 months off.” In the off-season, she urges them to strengthen their backs and cores.
Such advice can “feel like a bombshell,” said Dr. Carl, who chairs the Council on Sports Medicine and Fitness for the American Academy of Pediatrics. ‘Some started at a very young age. They go to camps. If I say to a teenager, ‘If you do this, I can keep you from getting injured,’ they think, ‘I won’t be injured.’” Most parents, however, understand the risk of “doing too much, too soon.”
Justin Orenduff, a former pitching prospect until his arm blew out, has made a career teaching head-to-toe pitching mechanics. He founded DVS Baseball, which uses software to teach pitchers how to properly use every muscle, starting with the orientation of the back foot. He, too, argues against pitching year-round. “Everyone on that travel team expects to get their fair share of playing time,” he said. “It just never stops.”
Organized baseball is paying attention. It has come up with the Pitch Smart program that gives maximum pitch counts for young players, but experts said children often get around that by belonging to several leagues.
Dr. Altchek said some surgeons have added platelet-rich plasma, stem cells, and bone marrow during surgery to quicken the slow healing time from UCL replacement. But he said, “it has to heal. Can you speed up biology?”
Dr. McCulloch said that, all the advances in Tommy John surgery aside, “the next frontier is really trying to crack the code on prevention.”
A version of this article first appeared on Medscape.com.
In 1974, Tommy John of the Los Angeles Dodgers was 31 and a 12-year veteran of Major League Baseball when he became the unwitting vanguard of a revolution in baseball and orthopedics. Fifty years later, Mr. John might not be a candidate for the latest advances to a procedure that bears his name.
The southpaw pitcher had faced the abrupt end of his career when, after one fateful delivery, he found himself unable to throw to home. So he took a gamble on the surgical equivalent of a Hail Mary: the reconstruction of a torn ligament in his pitching elbow.
The experiment was a wild success. Mr. John pitched— and better than he had before — for another 14 seasons, retiring in 1989 at the age of 46. How much better? After the surgery, he tallied three 20-win seasons compared with none before the operation, and he finished among the top five vote-getters for the annual Cy Young Award three times. He was named an All-Star once before the surgery and three times after.
The triumph notwithstanding, Tommy John now cautions against Tommy John surgery. What’s given him and clinicians pause is a trend in recent years of ever-younger athletes who undergo the procedure.
Along with the surgical improvements in repairing a torn ulnar collateral ligament (UCL) is a demographic shift toward school-aged athletes who get it. By 2014, one study concluded that 67.4% of UCL reconstruction surgeries were performed on athletes between 16 and 20 years of age. Some patients are still in Little League when they undergo the procedure.
Experts say these athletes have weakened their UCLs through overuse. They disagree on whether to call it an “epidemic,” but if it is, “the vaccine is awareness” against throwing too hard and too often, said Eric Makhni, MD, an orthopedic surgeon at Henry Ford Health in Detroit.
From Career-Ending to Routine
Mr. John’s entry into baseball and orthopedic lore was initially slow, but the trickle turned into a tide. After Frank Jobe, MD, swapped a healthy tendon from John’s right wrist for his worn and torn left UCL on September 25, 1974, he didn’t perform his second surgery for another 1194 days. By the time “Tommy John surgery” became a recognized phrase, Mr. John was still active but only 14 professional baseball players had undergone the operation.
Prior to the start of spring training this year, an oft-cited database listed 366 pro players who’d undergone the operation.
“Before Tommy John, that was a career-ending injury,” said Grant E. Garrigues, MD, an orthopedic surgeon at Midwest Orthopaedics at RUSH in Chicago, who called Mr. John “a pure revolutionary.”
Tommy John surgery is “the only one that I can think of that is named after the patient rather than the doctor who first did it,” said Patrick McCulloch, MD, an orthopedic surgeon in Houston and a team physician for the Astros.
Dr. McCulloch, who performs about 25 UCL repairs a year, said that by recent estimates, one-third of pro pitchers had had some sort of surgical repair. He hesitated to call the increasing number of operations an epidemic but acknowledged that the ingredients exist for more elbow trauma among baseball players.
“More people are playing more often, and people are bigger and stronger and throwing harder,” he said.
Either way, Dr. McCulloch said, “the procedure is a victim of its own success” because it is “just done phenomenally well.”
The surgery is now commonplace — perhaps too commonplace, said David W. Altchek, MD, attending surgeon and co-chief emeritus at Hospital for Special Surgery in New York City.
Dr. Altchek played a key role in the popularity of the operation. Twenty-two years after Mr. John’s surgery, he helped develop a variation of the procedure called the docking technique.
Whereas Dr. Jobe sutured Mr. John’s replacement graft to itself, “we developed a different way of tying it over a bone bridge, which was more secure and more easy to tension,” Dr. Altchek explained.
The advance meant less drilling into bone and enabled surgeons to avoid moving a problem-free ulnar nerve or removing the flexor-pronator muscle that protects the elbow from stress. “The trauma of the surgery is significantly less,” he said. “We just made it a lot easier very quickly,” cutting the surgery time from 2 hours to 30-40 minutes.
Maybe the surgery became too easy, said Dr. Altchek, who estimates he has done 2000 of them over the past 30 years. “I don’t want to condemn my colleagues, but there are a lot of people doing the surgery,” he said. “And not a lot of people are doing a lot of them, and they don’t know the nuances of doing the surgery.”
The older procedures are known as the “full Tommy John”; each has a 12- to 18-month healing process, with a success rate of 80%-85%. Pitchers typically sit out a season while recovering.
Brandon Erickson, MD, an orthopedic surgeon at Rothman Orthopaedic Institute in New York City, said that in younger patients he has recently turned more often to the suture of the future: an internal brace that provides a repair rather than reconstruction.
The procedure, pioneered by Felix H. Savoie III, MD, the Ray J. Haddad Professor of Orthopaedics at Tulane University School of Medicine in New Orleans, and Jeffrey R. Dugas, MD, of Andrews Sports Medicine & Orthopaedic Center in Birmingham, Alabama, uses collagen-coated tape that looks like a shoelace and provides a scaffold that Dr. McCulloch said “is inductive to healing and growth of ligament tissue.”
The brace is intended for an “overhead” athlete (mostly baseball players but also javelin throwers and gymnasts) whose UCL is torn on only one side but is otherwise in good shape. In a pitcher the same age as Mr. John was when Dr. Jobe performed the first procedure, “that ligament may not be of very good quality,” Dr. McCulloch said. “It may have thickened. It may have calcifications.” But for a high-school junior with aspirations to pitch in college or beyond without “way too many miles on the elbow,” the approach is a good fit. The healing process is as little as 6 months.
“The ones who have a good ligament are very likely to do well,” said Dr. Erickson, an assistant team doctor for the Philadelphia Phillies.
“If the patient’s ligament is generally ‘good’ with only a tear, the InternalBrace procedure may be used to repair the native ligament. On the other end of the spectrum, if the patient’s ligament is torn and degenerative the surgeon may opt to do a UCL reconstruction using an auto or allograft — ie, Tommy John surgery,” Allen Holowecky, senior product manager of Arthrex of Naples, Florida, the maker of the InternalBrace, told this news organization. “Before UCL repair, Tommy John surgery was the only real treatment option. We tend to see repairs done on younger patients since their ligament hasn’t seen years of use-damage.”
Calls for Caution
Tommy John III wanted to play baseball like his dad until near-fatal complications from shoulder surgery altered his path. He was drawn to chiropractic and consults on injury prevention. “All surgeries and all medical interventions are cut first, ask questions later,” he said. “I was born with that.”
He saw his dad’s slow, heroic comeback from the surgery and described him as the perfect candidate for Dr. Jobe’s experiment. Tommy John spent his recovery time squeezing Silly Putty and throwing tennis balls. “He was willing to do anything necessary. He wanted to throw. That was his brush.” When the son was recovering from his own injury, “he said, ‘Learn the knuckleball.’ I said, ‘I don’t want to. I’ve reached my point.’ ”
He said he tells young patients with UCL injuries to rest. But instead “we have year-round sports with the promise that the more you play, the better,” he said. “They’re over-activitied.”
According to the American Academy of Orthopaedic Surgeons, 6.4 million children and adolescents in the United States played organized baseball in 2022, down from 11.5 million in 2014. Nearly half of pitchers played in a league with no maximum pitch counts, and 43.5% pitched on consecutive days, the group said.
How many UCL repair or reconstruction surgeries are performed on youth athletes each year is unclear. A 2019 study, however, found that although baseball injuries decreased between 2006 and 2016, the elbow was “the only location of injury that saw an increase.”
Dr. Garrigues said some parents of throwing athletes have asked about prophylactic Tommy John surgery for their children. He said it shouldn’t apply to pitchers.
“People have taken it a little too far,” he said. Dr. Garrigues and others argue against children throwing weighted balls when coming back from surgery. Instead, “we’re shutting them down,” he said.
Throwing any pitch is an act of violence on the body, Dr. Garrigues said, with the elbow taking the final brunt of the force. “These pitchers are functioning at the absolute limits of what the human body can take,” he said. “There’s only so many bullets in a gun,” which is why pitchers often feel the twinge of a torn UCL on a routine pitch.
Dr. Makhni suggested cross-training for pitchers in the off-season instead of playing baseball year-round. “If you play soccer, your footwork is going to be better,” he said.
“Kids shouldn’t be doing this all year round,” said Rebecca Carl, MD, associate professor of pediatrics at Northwestern University Feinberg School of Medicine in Chicago. “We are recommending that kids take 2 or 3 months off.” In the off-season, she urges them to strengthen their backs and cores.
Such advice can “feel like a bombshell,” said Dr. Carl, who chairs the Council on Sports Medicine and Fitness for the American Academy of Pediatrics. ‘Some started at a very young age. They go to camps. If I say to a teenager, ‘If you do this, I can keep you from getting injured,’ they think, ‘I won’t be injured.’” Most parents, however, understand the risk of “doing too much, too soon.”
Justin Orenduff, a former pitching prospect until his arm blew out, has made a career teaching head-to-toe pitching mechanics. He founded DVS Baseball, which uses software to teach pitchers how to properly use every muscle, starting with the orientation of the back foot. He, too, argues against pitching year-round. “Everyone on that travel team expects to get their fair share of playing time,” he said. “It just never stops.”
Organized baseball is paying attention. It has come up with the Pitch Smart program that gives maximum pitch counts for young players, but experts said children often get around that by belonging to several leagues.
Dr. Altchek said some surgeons have added platelet-rich plasma, stem cells, and bone marrow during surgery to quicken the slow healing time from UCL replacement. But he said, “it has to heal. Can you speed up biology?”
Dr. McCulloch said that, all the advances in Tommy John surgery aside, “the next frontier is really trying to crack the code on prevention.”
A version of this article first appeared on Medscape.com.
Money, Ethnicity, and Access Linked to Cervical Cancer Disparities
These findings come from analyses of insurance data gathered via the Cervical Cancer Geo-Analyzer tool, a publicly available online instrument designed to provide visual representation of recurrent or metastatic cervical cancer burden across metropolitan statistical areas in the United States over multiple years.
[Reporting the findings of] “this study is the first step to optimize healthcare resources allocations, advocate for policy changes that will minimize access barriers, and tailor education for modern treatment options to help reduce and improve outcomes for cervical cancer in US patients,” said Tara Castellano, MD, an author and presenter of this new research, at the Society of Gynecologic Oncology’s Annual Meeting on Women’s Cancer, held in San Diego.
Seeing Cancer Cases
Dr. Castellano and colleagues previously reported that the Geo-Analyzer tool effectively provides quantified evidence of cervical cancer disease burden and graphic representation of geographical variations across the United States for both incident and recurrent/metastatic cervical cancer.
In the current analysis, Dr. Castellano, of Louisiana State University School of Medicine in New Orleans, discussed potential factors related to cervical cancer incidence and geographic variations.
The study builds on previous studies that have shown that Black and Hispanic women have longer time to treatment and worse cervical cancer outcomes than White women.
For example, in a study published in the International Journal of Gynecologic Cancer, Marilyn Huang, MD, and colleagues from the University of Miami Miller School of Medicine, Miami, Florida, and other centers in Miami looked at time to treatment in a diverse population of 274 women starting therapy for cervical cancer.
They found that insurance type (private, public, or none) contributed to delay in treatment initiation regardless of the treatment modality, and that the patient’s language and institution of diagnosis also influenced time to treatment.
In a separate scientific poster presented at SGO 2024, Dr. Castellano and colleagues reported that, among women with newly diagnosed endometrial cancer, the median time to treatment was 7 days longer for both Hispanic and Black women, compared with non-Hispanic White women. In addition, Black women had a 7-day longer time to receiving their first therapy for advanced disease. All of these differences were statistically significant.
Dr. Castellano told this news organization that the time-to-treatment disparities in the endometrial cancer study were determined by diagnostic codes and the timing of insurance claims.
Reasons for the disparities may include more limited access to care and structural and systemic biases in the healthcare systems where the majority of Black and Hispanic patients live, she said.
Insurance Database
In the new study on cervical cancer, Dr. Castellano and her team defined cervical cancer burden as prevalent cervical cancer diagnosis per 100,000 eligible women enrolled in a commercial insurance plan, Medicaid, or Medicare Advantage. Recurrent or metastatic cancer was determined to be the proportion of patients with cervical cancer who initiated systemic therapy.
The goals of the study were to provide a visualization of geographical distribution of cervical cancer in the US, and to quantify associations between early or advanced cancers with screening rates, poverty level, race/ethnicity, and access to brachytherapy.
The administrative claims database queried for the study included information on 75,521 women (median age 53) with a first diagnosis of cervical cancer from 2015 through 2022, and 14,033 women with recurrent or metastatic malignancies (median age 59 years).
Distribution of cases was higher in the South compared with in other US regions (37% vs approximately 20% for other regions).
Looking at the association between screening rates and disease burden from 2017 through 2022, the Geo-Analyzer showed that higher screening rates were significantly associated with decreased burden of new cases only in the South, whereas higher screening rates were associated with lower recurrent/metastatic disease burden in the Midwest and South, but a higher disease burden in the West.
In all regions, there was a significant association between decreased early cancer burden in areas with high percentages of women of Asian heritage, and significantly increased burden in areas with large populations of women of Hispanic origin.
The only significant association of race/ethnicity with recurrent/metastatic burden was a decrease in the Midwest in populations with large Asian populations.
An analysis of the how poverty levels affected screening and disease burden showed that in areas with a high percentage of low-income households there were significant associations with decreased cervical cancer screening and higher burden of newly diagnosed cases.
Poverty levels were significantly associated with recurrent/metastatic cancers only in the South.
The investigators also found that the presence of one or more brachytherapy centers within a ZIP-3 region (that is, a large geographic area designated by the first 3 digits of ZIP codes rather than 5-digit city codes) was associated with a 2.7% reduction in recurrent or metastatic cervical cancer burden (P less than .001).
Demographic Marker?
Reasons for disparities are complex and may involve a combination of inadequate health literacy and social and economic circumstances, said Cesar Castro, MD, commenting on the new cervical cancer study.
He noted in an interview that “the concept that a single Pap smear is often insufficient to capture precancerous changes, and hence the need for serial testing every 3 years, can be lost on individuals who also have competing challenges securing paychecks and/or dependent care. Historical barriers such as perceptions of the underlying cause of cervical cancer, the HPV virus, being a sexually transmitted disease and hence a taboo subject, also underpin decision-making. These sentiments have also fueled resistance towards HPV vaccination in young girls and boys.”
Dr. Castro, who is Program Director for Gynecologic Oncology at the Mass General Cancer Center in Boston, pointed out that treatments for cervical cancer often involve surgery or a combination of chemotherapy and radiation, and that side effects from these interventions may be especially disruptive to the lives of women who are breadwinners or caregivers for their families.
“These are the shackles that poverty places on many Black and Hispanic women notably in under-resourced regions domestically and globally,” he said.
The study was supported by Seagen and Genmab. Dr. Castellano disclosed consulting fees from GSK and Nykode and grant support from BMS. Dr. Castro reported no relevant conflicts of interest and was not involved in either of the studies presented at the meeting.
These findings come from analyses of insurance data gathered via the Cervical Cancer Geo-Analyzer tool, a publicly available online instrument designed to provide visual representation of recurrent or metastatic cervical cancer burden across metropolitan statistical areas in the United States over multiple years.
[Reporting the findings of] “this study is the first step to optimize healthcare resources allocations, advocate for policy changes that will minimize access barriers, and tailor education for modern treatment options to help reduce and improve outcomes for cervical cancer in US patients,” said Tara Castellano, MD, an author and presenter of this new research, at the Society of Gynecologic Oncology’s Annual Meeting on Women’s Cancer, held in San Diego.
Seeing Cancer Cases
Dr. Castellano and colleagues previously reported that the Geo-Analyzer tool effectively provides quantified evidence of cervical cancer disease burden and graphic representation of geographical variations across the United States for both incident and recurrent/metastatic cervical cancer.
In the current analysis, Dr. Castellano, of Louisiana State University School of Medicine in New Orleans, discussed potential factors related to cervical cancer incidence and geographic variations.
The study builds on previous studies that have shown that Black and Hispanic women have longer time to treatment and worse cervical cancer outcomes than White women.
For example, in a study published in the International Journal of Gynecologic Cancer, Marilyn Huang, MD, and colleagues from the University of Miami Miller School of Medicine, Miami, Florida, and other centers in Miami looked at time to treatment in a diverse population of 274 women starting therapy for cervical cancer.
They found that insurance type (private, public, or none) contributed to delay in treatment initiation regardless of the treatment modality, and that the patient’s language and institution of diagnosis also influenced time to treatment.
In a separate scientific poster presented at SGO 2024, Dr. Castellano and colleagues reported that, among women with newly diagnosed endometrial cancer, the median time to treatment was 7 days longer for both Hispanic and Black women, compared with non-Hispanic White women. In addition, Black women had a 7-day longer time to receiving their first therapy for advanced disease. All of these differences were statistically significant.
Dr. Castellano told this news organization that the time-to-treatment disparities in the endometrial cancer study were determined by diagnostic codes and the timing of insurance claims.
Reasons for the disparities may include more limited access to care and structural and systemic biases in the healthcare systems where the majority of Black and Hispanic patients live, she said.
Insurance Database
In the new study on cervical cancer, Dr. Castellano and her team defined cervical cancer burden as prevalent cervical cancer diagnosis per 100,000 eligible women enrolled in a commercial insurance plan, Medicaid, or Medicare Advantage. Recurrent or metastatic cancer was determined to be the proportion of patients with cervical cancer who initiated systemic therapy.
The goals of the study were to provide a visualization of geographical distribution of cervical cancer in the US, and to quantify associations between early or advanced cancers with screening rates, poverty level, race/ethnicity, and access to brachytherapy.
The administrative claims database queried for the study included information on 75,521 women (median age 53) with a first diagnosis of cervical cancer from 2015 through 2022, and 14,033 women with recurrent or metastatic malignancies (median age 59 years).
Distribution of cases was higher in the South compared with in other US regions (37% vs approximately 20% for other regions).
Looking at the association between screening rates and disease burden from 2017 through 2022, the Geo-Analyzer showed that higher screening rates were significantly associated with decreased burden of new cases only in the South, whereas higher screening rates were associated with lower recurrent/metastatic disease burden in the Midwest and South, but a higher disease burden in the West.
In all regions, there was a significant association between decreased early cancer burden in areas with high percentages of women of Asian heritage, and significantly increased burden in areas with large populations of women of Hispanic origin.
The only significant association of race/ethnicity with recurrent/metastatic burden was a decrease in the Midwest in populations with large Asian populations.
An analysis of the how poverty levels affected screening and disease burden showed that in areas with a high percentage of low-income households there were significant associations with decreased cervical cancer screening and higher burden of newly diagnosed cases.
Poverty levels were significantly associated with recurrent/metastatic cancers only in the South.
The investigators also found that the presence of one or more brachytherapy centers within a ZIP-3 region (that is, a large geographic area designated by the first 3 digits of ZIP codes rather than 5-digit city codes) was associated with a 2.7% reduction in recurrent or metastatic cervical cancer burden (P less than .001).
Demographic Marker?
Reasons for disparities are complex and may involve a combination of inadequate health literacy and social and economic circumstances, said Cesar Castro, MD, commenting on the new cervical cancer study.
He noted in an interview that “the concept that a single Pap smear is often insufficient to capture precancerous changes, and hence the need for serial testing every 3 years, can be lost on individuals who also have competing challenges securing paychecks and/or dependent care. Historical barriers such as perceptions of the underlying cause of cervical cancer, the HPV virus, being a sexually transmitted disease and hence a taboo subject, also underpin decision-making. These sentiments have also fueled resistance towards HPV vaccination in young girls and boys.”
Dr. Castro, who is Program Director for Gynecologic Oncology at the Mass General Cancer Center in Boston, pointed out that treatments for cervical cancer often involve surgery or a combination of chemotherapy and radiation, and that side effects from these interventions may be especially disruptive to the lives of women who are breadwinners or caregivers for their families.
“These are the shackles that poverty places on many Black and Hispanic women notably in under-resourced regions domestically and globally,” he said.
The study was supported by Seagen and Genmab. Dr. Castellano disclosed consulting fees from GSK and Nykode and grant support from BMS. Dr. Castro reported no relevant conflicts of interest and was not involved in either of the studies presented at the meeting.
These findings come from analyses of insurance data gathered via the Cervical Cancer Geo-Analyzer tool, a publicly available online instrument designed to provide visual representation of recurrent or metastatic cervical cancer burden across metropolitan statistical areas in the United States over multiple years.
[Reporting the findings of] “this study is the first step to optimize healthcare resources allocations, advocate for policy changes that will minimize access barriers, and tailor education for modern treatment options to help reduce and improve outcomes for cervical cancer in US patients,” said Tara Castellano, MD, an author and presenter of this new research, at the Society of Gynecologic Oncology’s Annual Meeting on Women’s Cancer, held in San Diego.
Seeing Cancer Cases
Dr. Castellano and colleagues previously reported that the Geo-Analyzer tool effectively provides quantified evidence of cervical cancer disease burden and graphic representation of geographical variations across the United States for both incident and recurrent/metastatic cervical cancer.
In the current analysis, Dr. Castellano, of Louisiana State University School of Medicine in New Orleans, discussed potential factors related to cervical cancer incidence and geographic variations.
The study builds on previous studies that have shown that Black and Hispanic women have longer time to treatment and worse cervical cancer outcomes than White women.
For example, in a study published in the International Journal of Gynecologic Cancer, Marilyn Huang, MD, and colleagues from the University of Miami Miller School of Medicine, Miami, Florida, and other centers in Miami looked at time to treatment in a diverse population of 274 women starting therapy for cervical cancer.
They found that insurance type (private, public, or none) contributed to delay in treatment initiation regardless of the treatment modality, and that the patient’s language and institution of diagnosis also influenced time to treatment.
In a separate scientific poster presented at SGO 2024, Dr. Castellano and colleagues reported that, among women with newly diagnosed endometrial cancer, the median time to treatment was 7 days longer for both Hispanic and Black women, compared with non-Hispanic White women. In addition, Black women had a 7-day longer time to receiving their first therapy for advanced disease. All of these differences were statistically significant.
Dr. Castellano told this news organization that the time-to-treatment disparities in the endometrial cancer study were determined by diagnostic codes and the timing of insurance claims.
Reasons for the disparities may include more limited access to care and structural and systemic biases in the healthcare systems where the majority of Black and Hispanic patients live, she said.
Insurance Database
In the new study on cervical cancer, Dr. Castellano and her team defined cervical cancer burden as prevalent cervical cancer diagnosis per 100,000 eligible women enrolled in a commercial insurance plan, Medicaid, or Medicare Advantage. Recurrent or metastatic cancer was determined to be the proportion of patients with cervical cancer who initiated systemic therapy.
The goals of the study were to provide a visualization of geographical distribution of cervical cancer in the US, and to quantify associations between early or advanced cancers with screening rates, poverty level, race/ethnicity, and access to brachytherapy.
The administrative claims database queried for the study included information on 75,521 women (median age 53) with a first diagnosis of cervical cancer from 2015 through 2022, and 14,033 women with recurrent or metastatic malignancies (median age 59 years).
Distribution of cases was higher in the South compared with in other US regions (37% vs approximately 20% for other regions).
Looking at the association between screening rates and disease burden from 2017 through 2022, the Geo-Analyzer showed that higher screening rates were significantly associated with decreased burden of new cases only in the South, whereas higher screening rates were associated with lower recurrent/metastatic disease burden in the Midwest and South, but a higher disease burden in the West.
In all regions, there was a significant association between decreased early cancer burden in areas with high percentages of women of Asian heritage, and significantly increased burden in areas with large populations of women of Hispanic origin.
The only significant association of race/ethnicity with recurrent/metastatic burden was a decrease in the Midwest in populations with large Asian populations.
An analysis of the how poverty levels affected screening and disease burden showed that in areas with a high percentage of low-income households there were significant associations with decreased cervical cancer screening and higher burden of newly diagnosed cases.
Poverty levels were significantly associated with recurrent/metastatic cancers only in the South.
The investigators also found that the presence of one or more brachytherapy centers within a ZIP-3 region (that is, a large geographic area designated by the first 3 digits of ZIP codes rather than 5-digit city codes) was associated with a 2.7% reduction in recurrent or metastatic cervical cancer burden (P less than .001).
Demographic Marker?
Reasons for disparities are complex and may involve a combination of inadequate health literacy and social and economic circumstances, said Cesar Castro, MD, commenting on the new cervical cancer study.
He noted in an interview that “the concept that a single Pap smear is often insufficient to capture precancerous changes, and hence the need for serial testing every 3 years, can be lost on individuals who also have competing challenges securing paychecks and/or dependent care. Historical barriers such as perceptions of the underlying cause of cervical cancer, the HPV virus, being a sexually transmitted disease and hence a taboo subject, also underpin decision-making. These sentiments have also fueled resistance towards HPV vaccination in young girls and boys.”
Dr. Castro, who is Program Director for Gynecologic Oncology at the Mass General Cancer Center in Boston, pointed out that treatments for cervical cancer often involve surgery or a combination of chemotherapy and radiation, and that side effects from these interventions may be especially disruptive to the lives of women who are breadwinners or caregivers for their families.
“These are the shackles that poverty places on many Black and Hispanic women notably in under-resourced regions domestically and globally,” he said.
The study was supported by Seagen and Genmab. Dr. Castellano disclosed consulting fees from GSK and Nykode and grant support from BMS. Dr. Castro reported no relevant conflicts of interest and was not involved in either of the studies presented at the meeting.
FROM SGO 2024
FDA OKs Danicopan Add-On for Extravascular Hemolysis in Adults With PNH
PNH is a rare blood disorder affecting 1-10 individuals per million. The condition, which eliminates red blood cells and leads to blood clots and impaired bone marrow function, can cause life-threatening anemia, thrombosis, and bone marrow dysfunction. About half of people with the condition die from thrombotic complications.
Ravulizumab and eculizumab, also both made by AstraZeneca, inhibit the destruction of red blood cells. However, 10%-20% of patients treated with the antibody infusions experience significant extravascular hemolysis, in which these surviving red blood cells are eliminated by the spleen and liver. Extravascular hemolysis can lead to ongoing anemia, which can lead patients to require blood transfusions.
Danicopan, an investigational, first-in-class, oral complement factor D inhibitor, is designed to control intravascular hemolysis and prevent extravascular hemolysis.
Approval of the oral medication was based on the phase 3 ALPHA trial in 63 patients with PNH who received ravulizumab or eculizumab and experienced significant extravascular hemolysis. These patients were randomized 2:1 to either danicopan or placebo.
Danicopan add-on significantly improved hemoglobin concentrations at 12 weeks (least squares mean improvement from baseline: 2.94 g/dL with danicopan vs 0.50 g/dL with placebo) and made transfusions less likely.
Headache, nausea, arthralgia, and diarrhea were the most common treatment-emergent side effects. Serious adverse events in the danicopan group included cholecystitis and COVID-19 in one patient each.
Danicopan carries a boxed warning of serious infections and is available only through a Risk Evaluation and Mitigation Strategy program.
A version of this article appeared on Medscape.com.
PNH is a rare blood disorder affecting 1-10 individuals per million. The condition, which eliminates red blood cells and leads to blood clots and impaired bone marrow function, can cause life-threatening anemia, thrombosis, and bone marrow dysfunction. About half of people with the condition die from thrombotic complications.
Ravulizumab and eculizumab, also both made by AstraZeneca, inhibit the destruction of red blood cells. However, 10%-20% of patients treated with the antibody infusions experience significant extravascular hemolysis, in which these surviving red blood cells are eliminated by the spleen and liver. Extravascular hemolysis can lead to ongoing anemia, which can lead patients to require blood transfusions.
Danicopan, an investigational, first-in-class, oral complement factor D inhibitor, is designed to control intravascular hemolysis and prevent extravascular hemolysis.
Approval of the oral medication was based on the phase 3 ALPHA trial in 63 patients with PNH who received ravulizumab or eculizumab and experienced significant extravascular hemolysis. These patients were randomized 2:1 to either danicopan or placebo.
Danicopan add-on significantly improved hemoglobin concentrations at 12 weeks (least squares mean improvement from baseline: 2.94 g/dL with danicopan vs 0.50 g/dL with placebo) and made transfusions less likely.
Headache, nausea, arthralgia, and diarrhea were the most common treatment-emergent side effects. Serious adverse events in the danicopan group included cholecystitis and COVID-19 in one patient each.
Danicopan carries a boxed warning of serious infections and is available only through a Risk Evaluation and Mitigation Strategy program.
A version of this article appeared on Medscape.com.
PNH is a rare blood disorder affecting 1-10 individuals per million. The condition, which eliminates red blood cells and leads to blood clots and impaired bone marrow function, can cause life-threatening anemia, thrombosis, and bone marrow dysfunction. About half of people with the condition die from thrombotic complications.
Ravulizumab and eculizumab, also both made by AstraZeneca, inhibit the destruction of red blood cells. However, 10%-20% of patients treated with the antibody infusions experience significant extravascular hemolysis, in which these surviving red blood cells are eliminated by the spleen and liver. Extravascular hemolysis can lead to ongoing anemia, which can lead patients to require blood transfusions.
Danicopan, an investigational, first-in-class, oral complement factor D inhibitor, is designed to control intravascular hemolysis and prevent extravascular hemolysis.
Approval of the oral medication was based on the phase 3 ALPHA trial in 63 patients with PNH who received ravulizumab or eculizumab and experienced significant extravascular hemolysis. These patients were randomized 2:1 to either danicopan or placebo.
Danicopan add-on significantly improved hemoglobin concentrations at 12 weeks (least squares mean improvement from baseline: 2.94 g/dL with danicopan vs 0.50 g/dL with placebo) and made transfusions less likely.
Headache, nausea, arthralgia, and diarrhea were the most common treatment-emergent side effects. Serious adverse events in the danicopan group included cholecystitis and COVID-19 in one patient each.
Danicopan carries a boxed warning of serious infections and is available only through a Risk Evaluation and Mitigation Strategy program.
A version of this article appeared on Medscape.com.
Single Session Mindfulness Intervention Linked to Reduced Depression
TOPLINE:
One session of a telehealth intervention combining mindfulness and compassion significantly lowered self-perceived stress and symptoms of depression and anxiety compared with a waitlist control group, results of a new trial showed.
METHODOLOGY:
- The randomized clinical trial (RCT) included 91 participants aged 18-70 years recruited from the community and the University of Texas at Austin and followed from 2020 to 2021.
- To be included in the trial, participants had to be sheltering at home during the pandemic and endorse loneliness as one of the top issues affecting them.
- Participants were randomized to one of three groups that received single-session online interventions. These included mindfulness-only (MO), mindfulness and compassion (MC), and a waitlist control (WL) group.
- During the compassion component, participants were instructed to focus on a person, place, object, or spiritual figure that evoked feelings of warmth, love, and kindness in them. The primary outcome was self-reported loneliness and secondary outcomes were self-reported stress, depression, and anxiety.
TAKEAWAY:
- At 1-week follow-up, the MC group led to reductions in perceived stress (b = −3.75), anxiety (b = −3.79), and depression (b = −3.01) but not loneliness compared with control individuals.
- Compared with the MO group alone, the MC group had no meaningful differences in perceived depression (b = −1.08) or anxiety (b = −1.50), and the same was true at the 2-week follow-up.
- Researchers speculated that the lack of difference between outcomes in the two mindfulness groups probably meant that the MC group may have only been effective in reducing self-perceived symptoms of stress, anxiety, and depression compared with the control group.
IN PRACTICE:
“This brief single session mindfulness intervention offers an approach that can be easily adopted in a range of contexts. It is important for future research to evaluate this approach with larger samples and to examine whether changes in symptoms are maintained over longer periods of time,” the researchers wrote.
SOURCE:
Mikael Rubin, PhD, of Palo Alto University in Palo Alto, California, led the study, which was published online in PLOS ONE.
LIMITATIONS:
The study was limited by its small sample size and short follow-up period.
DISCLOSURES:
There was no funding listed for the study nor were there any reported disclosures.
A version of this article appeared on Medscape.com.
TOPLINE:
One session of a telehealth intervention combining mindfulness and compassion significantly lowered self-perceived stress and symptoms of depression and anxiety compared with a waitlist control group, results of a new trial showed.
METHODOLOGY:
- The randomized clinical trial (RCT) included 91 participants aged 18-70 years recruited from the community and the University of Texas at Austin and followed from 2020 to 2021.
- To be included in the trial, participants had to be sheltering at home during the pandemic and endorse loneliness as one of the top issues affecting them.
- Participants were randomized to one of three groups that received single-session online interventions. These included mindfulness-only (MO), mindfulness and compassion (MC), and a waitlist control (WL) group.
- During the compassion component, participants were instructed to focus on a person, place, object, or spiritual figure that evoked feelings of warmth, love, and kindness in them. The primary outcome was self-reported loneliness and secondary outcomes were self-reported stress, depression, and anxiety.
TAKEAWAY:
- At 1-week follow-up, the MC group led to reductions in perceived stress (b = −3.75), anxiety (b = −3.79), and depression (b = −3.01) but not loneliness compared with control individuals.
- Compared with the MO group alone, the MC group had no meaningful differences in perceived depression (b = −1.08) or anxiety (b = −1.50), and the same was true at the 2-week follow-up.
- Researchers speculated that the lack of difference between outcomes in the two mindfulness groups probably meant that the MC group may have only been effective in reducing self-perceived symptoms of stress, anxiety, and depression compared with the control group.
IN PRACTICE:
“This brief single session mindfulness intervention offers an approach that can be easily adopted in a range of contexts. It is important for future research to evaluate this approach with larger samples and to examine whether changes in symptoms are maintained over longer periods of time,” the researchers wrote.
SOURCE:
Mikael Rubin, PhD, of Palo Alto University in Palo Alto, California, led the study, which was published online in PLOS ONE.
LIMITATIONS:
The study was limited by its small sample size and short follow-up period.
DISCLOSURES:
There was no funding listed for the study nor were there any reported disclosures.
A version of this article appeared on Medscape.com.
TOPLINE:
One session of a telehealth intervention combining mindfulness and compassion significantly lowered self-perceived stress and symptoms of depression and anxiety compared with a waitlist control group, results of a new trial showed.
METHODOLOGY:
- The randomized clinical trial (RCT) included 91 participants aged 18-70 years recruited from the community and the University of Texas at Austin and followed from 2020 to 2021.
- To be included in the trial, participants had to be sheltering at home during the pandemic and endorse loneliness as one of the top issues affecting them.
- Participants were randomized to one of three groups that received single-session online interventions. These included mindfulness-only (MO), mindfulness and compassion (MC), and a waitlist control (WL) group.
- During the compassion component, participants were instructed to focus on a person, place, object, or spiritual figure that evoked feelings of warmth, love, and kindness in them. The primary outcome was self-reported loneliness and secondary outcomes were self-reported stress, depression, and anxiety.
TAKEAWAY:
- At 1-week follow-up, the MC group led to reductions in perceived stress (b = −3.75), anxiety (b = −3.79), and depression (b = −3.01) but not loneliness compared with control individuals.
- Compared with the MO group alone, the MC group had no meaningful differences in perceived depression (b = −1.08) or anxiety (b = −1.50), and the same was true at the 2-week follow-up.
- Researchers speculated that the lack of difference between outcomes in the two mindfulness groups probably meant that the MC group may have only been effective in reducing self-perceived symptoms of stress, anxiety, and depression compared with the control group.
IN PRACTICE:
“This brief single session mindfulness intervention offers an approach that can be easily adopted in a range of contexts. It is important for future research to evaluate this approach with larger samples and to examine whether changes in symptoms are maintained over longer periods of time,” the researchers wrote.
SOURCE:
Mikael Rubin, PhD, of Palo Alto University in Palo Alto, California, led the study, which was published online in PLOS ONE.
LIMITATIONS:
The study was limited by its small sample size and short follow-up period.
DISCLOSURES:
There was no funding listed for the study nor were there any reported disclosures.
A version of this article appeared on Medscape.com.
Maternal Lifestyle Interventions Boost Babies’ Heart Health
Infants born to women with obesity showed improved measures of cardiovascular health when their mothers adopted healthier lifestyles before and during pregnancy, based on data from a systematic review presented at the annual meeting of the Society for Reproductive Investigation.
Previous research has shown that children born to mothers with a high body mass index (BMI) are more likely to die from cardiovascular disease in later life, said presenting author Samuel J. Burden, PhD, in an interview.
“Surprisingly, early signs of these heart issues can start before birth and continue into childhood,” said Dr. Burden, a research associate in the Department of Women & Children’s Health, School of Life Course & Population Sciences, King’s College London, London, United Kingdom.
To examine the effect of interventions such as a healthy diet and exercise in pregnant women with obesity on the heart health of their infants, Dr. Burden and colleagues reviewed data from eight randomized, controlled trials involving diet and exercise for pregnant women with obesity. Of these, two used antenatal exercise, two used diet and physical activity, and one used preconception diet and physical activity. The studies ranged in size from 18 to 404 participants. Two studies included infants younger than 2 months of age, and four studies included children aged 3-7 years.
Overall, lifestyle interventions before conception and before birth were associated with significant changes in cardiac remodeling, specifically reduced interventricular septal wall thickness.
In addition, one of three studies of cardiac diastolic function and four of five studies of systolic function showed significant improvements. The five studies of cardiac systolic function and three studies of diastolic function also showed improvement in systolic and diastolic blood pressure in infants of mothers who took part in the interventions. The studies were limited mainly by large attrition rates, the researchers wrote in their presentation. However, more studies in larger populations that also include older children could confirm the findings and inform public health strategies to promote healthy lifestyles for pregnant women, they noted.
Encourage Healthy Lifestyle Before and During Pregnancy
The evidence supports the findings from animal studies showing that an offspring’s health is influenced by maternal lifestyle before and during pregnancy, Dr. Burden said in an interview. The data suggest that healthcare providers should encourage women with a high BMI who want to become pregnant to eat healthfully and become more active as a way to enhance the future cardiovascular health of their children, he said.
The full results of the current study are soon to be published, but more work is needed, said Dr. Burden. “While we observed a protective effect from these lifestyle programs, there is a need for more extensive studies involving a larger number of women (and their children) who were part of the initial research,” he said. “Additionally, it will be crucial to track these children into adulthood to determine whether these antenatal lifestyle interventions persist in lowering the risk of future cardiovascular disease.”
Beginning healthy lifestyle programs prior to pregnancy might yield the best results for promoting infant cardiovascular health, and more prepregnancy interventions for women with obesity are needed, Dr. Burden added.
The current study adds to the growing body of evidence that the in utero environment can have lifelong effects on offspring, Joseph R. Biggio Jr, MD, system chair of maternal fetal medicine at Ochsner Health, New Orleans, Louisiana, said in an interview.
“Several studies have previously shown that the children of mothers with diabetes, hypertension, or obesity are at increased risk for developing signs of metabolic syndrome and cardiovascular changes during childhood or adolescence,” said Dr. Biggio.
The data from this systematic review support the potential value of interventions aimed at improving maternal weight gain and cardiovascular performance before and during pregnancy that may result in reduced cardiovascular remodeling and myocardial thickening in infants, he said.
The study was supported by a British Heart Foundation Special Project Grant. The researchers had no financial conflicts to disclose. Dr. Biggio had no financial conflicts to disclose.
Infants born to women with obesity showed improved measures of cardiovascular health when their mothers adopted healthier lifestyles before and during pregnancy, based on data from a systematic review presented at the annual meeting of the Society for Reproductive Investigation.
Previous research has shown that children born to mothers with a high body mass index (BMI) are more likely to die from cardiovascular disease in later life, said presenting author Samuel J. Burden, PhD, in an interview.
“Surprisingly, early signs of these heart issues can start before birth and continue into childhood,” said Dr. Burden, a research associate in the Department of Women & Children’s Health, School of Life Course & Population Sciences, King’s College London, London, United Kingdom.
To examine the effect of interventions such as a healthy diet and exercise in pregnant women with obesity on the heart health of their infants, Dr. Burden and colleagues reviewed data from eight randomized, controlled trials involving diet and exercise for pregnant women with obesity. Of these, two used antenatal exercise, two used diet and physical activity, and one used preconception diet and physical activity. The studies ranged in size from 18 to 404 participants. Two studies included infants younger than 2 months of age, and four studies included children aged 3-7 years.
Overall, lifestyle interventions before conception and before birth were associated with significant changes in cardiac remodeling, specifically reduced interventricular septal wall thickness.
In addition, one of three studies of cardiac diastolic function and four of five studies of systolic function showed significant improvements. The five studies of cardiac systolic function and three studies of diastolic function also showed improvement in systolic and diastolic blood pressure in infants of mothers who took part in the interventions. The studies were limited mainly by large attrition rates, the researchers wrote in their presentation. However, more studies in larger populations that also include older children could confirm the findings and inform public health strategies to promote healthy lifestyles for pregnant women, they noted.
Encourage Healthy Lifestyle Before and During Pregnancy
The evidence supports the findings from animal studies showing that an offspring’s health is influenced by maternal lifestyle before and during pregnancy, Dr. Burden said in an interview. The data suggest that healthcare providers should encourage women with a high BMI who want to become pregnant to eat healthfully and become more active as a way to enhance the future cardiovascular health of their children, he said.
The full results of the current study are soon to be published, but more work is needed, said Dr. Burden. “While we observed a protective effect from these lifestyle programs, there is a need for more extensive studies involving a larger number of women (and their children) who were part of the initial research,” he said. “Additionally, it will be crucial to track these children into adulthood to determine whether these antenatal lifestyle interventions persist in lowering the risk of future cardiovascular disease.”
Beginning healthy lifestyle programs prior to pregnancy might yield the best results for promoting infant cardiovascular health, and more prepregnancy interventions for women with obesity are needed, Dr. Burden added.
The current study adds to the growing body of evidence that the in utero environment can have lifelong effects on offspring, Joseph R. Biggio Jr, MD, system chair of maternal fetal medicine at Ochsner Health, New Orleans, Louisiana, said in an interview.
“Several studies have previously shown that the children of mothers with diabetes, hypertension, or obesity are at increased risk for developing signs of metabolic syndrome and cardiovascular changes during childhood or adolescence,” said Dr. Biggio.
The data from this systematic review support the potential value of interventions aimed at improving maternal weight gain and cardiovascular performance before and during pregnancy that may result in reduced cardiovascular remodeling and myocardial thickening in infants, he said.
The study was supported by a British Heart Foundation Special Project Grant. The researchers had no financial conflicts to disclose. Dr. Biggio had no financial conflicts to disclose.
Infants born to women with obesity showed improved measures of cardiovascular health when their mothers adopted healthier lifestyles before and during pregnancy, based on data from a systematic review presented at the annual meeting of the Society for Reproductive Investigation.
Previous research has shown that children born to mothers with a high body mass index (BMI) are more likely to die from cardiovascular disease in later life, said presenting author Samuel J. Burden, PhD, in an interview.
“Surprisingly, early signs of these heart issues can start before birth and continue into childhood,” said Dr. Burden, a research associate in the Department of Women & Children’s Health, School of Life Course & Population Sciences, King’s College London, London, United Kingdom.
To examine the effect of interventions such as a healthy diet and exercise in pregnant women with obesity on the heart health of their infants, Dr. Burden and colleagues reviewed data from eight randomized, controlled trials involving diet and exercise for pregnant women with obesity. Of these, two used antenatal exercise, two used diet and physical activity, and one used preconception diet and physical activity. The studies ranged in size from 18 to 404 participants. Two studies included infants younger than 2 months of age, and four studies included children aged 3-7 years.
Overall, lifestyle interventions before conception and before birth were associated with significant changes in cardiac remodeling, specifically reduced interventricular septal wall thickness.
In addition, one of three studies of cardiac diastolic function and four of five studies of systolic function showed significant improvements. The five studies of cardiac systolic function and three studies of diastolic function also showed improvement in systolic and diastolic blood pressure in infants of mothers who took part in the interventions. The studies were limited mainly by large attrition rates, the researchers wrote in their presentation. However, more studies in larger populations that also include older children could confirm the findings and inform public health strategies to promote healthy lifestyles for pregnant women, they noted.
Encourage Healthy Lifestyle Before and During Pregnancy
The evidence supports the findings from animal studies showing that an offspring’s health is influenced by maternal lifestyle before and during pregnancy, Dr. Burden said in an interview. The data suggest that healthcare providers should encourage women with a high BMI who want to become pregnant to eat healthfully and become more active as a way to enhance the future cardiovascular health of their children, he said.
The full results of the current study are soon to be published, but more work is needed, said Dr. Burden. “While we observed a protective effect from these lifestyle programs, there is a need for more extensive studies involving a larger number of women (and their children) who were part of the initial research,” he said. “Additionally, it will be crucial to track these children into adulthood to determine whether these antenatal lifestyle interventions persist in lowering the risk of future cardiovascular disease.”
Beginning healthy lifestyle programs prior to pregnancy might yield the best results for promoting infant cardiovascular health, and more prepregnancy interventions for women with obesity are needed, Dr. Burden added.
The current study adds to the growing body of evidence that the in utero environment can have lifelong effects on offspring, Joseph R. Biggio Jr, MD, system chair of maternal fetal medicine at Ochsner Health, New Orleans, Louisiana, said in an interview.
“Several studies have previously shown that the children of mothers with diabetes, hypertension, or obesity are at increased risk for developing signs of metabolic syndrome and cardiovascular changes during childhood or adolescence,” said Dr. Biggio.
The data from this systematic review support the potential value of interventions aimed at improving maternal weight gain and cardiovascular performance before and during pregnancy that may result in reduced cardiovascular remodeling and myocardial thickening in infants, he said.
The study was supported by a British Heart Foundation Special Project Grant. The researchers had no financial conflicts to disclose. Dr. Biggio had no financial conflicts to disclose.