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New European restrictions on topiramate in pregnancy
While it’s well known that topiramate can cause major congenital malformations and fetal growth restriction when used during pregnancy, recent data also suggest a possibly increased risk for neurodevelopmental disorders when topiramate is used during pregnancy, the EMA said in a statement.
The data include two observational studies that showed children born to mothers with epilepsy and who were exposed to topiramate in the womb may have a two- to threefold higher risk for neurodevelopmental disorders, in particular autism spectrum disorders (ASD), intellectual disability, or attention deficit hyperactivity disorder (ADHD), compared with children born to mothers with epilepsy not taking antiepileptic medication.
For patients using topiramate for the treatment of epilepsy, the PRAC now recommends that the medicine not be used during pregnancy unless no other suitable treatment is available.
The PRAC had also recommended a pregnancy prevention program to avoid exposure of the developing fetus to topiramate. “These measures will inform any woman or girl who is able to have children of the risks of taking topiramate during pregnancy and the need to avoid becoming pregnant while taking topiramate,” the EMA said.
Regardless of indication, the agency said topiramate should be used in women of childbearing age only when the following conditions of the pregnancy prevention program are met:
- A pregnancy test before starting treatment.
- Counseling about the risks of topiramate treatment and the need for highly effective contraception throughout treatment.
- A review of ongoing treatment at least annually by completion of a risk awareness form.
The PRAC recommends that health care professionals ensure women of childbearing age are fully aware of the risks of taking topiramate during pregnancy. The committee noted that alternative treatment options should be considered and the need for topiramate treatment should be reassessed at least annually.
The product information for topiramate-containing medicines will be updated to further highlight the risks for neurodevelopmental disorders and the additional safety measures to be taken.
Patients and health care professionals will be provided with educational materials regarding the risks of using topiramate during pregnancy, and a patient card will be provided to the patient with each medicine package. A visible warning will also be added to the outer packaging of the medicine.
The new PRAC recommendations will be sent to the Coordination Group for Mutual Recognition and Decentralised Procedures – Human (CMDh), which will adopt a position.
A version of this article first appeared on Medscape.com.
While it’s well known that topiramate can cause major congenital malformations and fetal growth restriction when used during pregnancy, recent data also suggest a possibly increased risk for neurodevelopmental disorders when topiramate is used during pregnancy, the EMA said in a statement.
The data include two observational studies that showed children born to mothers with epilepsy and who were exposed to topiramate in the womb may have a two- to threefold higher risk for neurodevelopmental disorders, in particular autism spectrum disorders (ASD), intellectual disability, or attention deficit hyperactivity disorder (ADHD), compared with children born to mothers with epilepsy not taking antiepileptic medication.
For patients using topiramate for the treatment of epilepsy, the PRAC now recommends that the medicine not be used during pregnancy unless no other suitable treatment is available.
The PRAC had also recommended a pregnancy prevention program to avoid exposure of the developing fetus to topiramate. “These measures will inform any woman or girl who is able to have children of the risks of taking topiramate during pregnancy and the need to avoid becoming pregnant while taking topiramate,” the EMA said.
Regardless of indication, the agency said topiramate should be used in women of childbearing age only when the following conditions of the pregnancy prevention program are met:
- A pregnancy test before starting treatment.
- Counseling about the risks of topiramate treatment and the need for highly effective contraception throughout treatment.
- A review of ongoing treatment at least annually by completion of a risk awareness form.
The PRAC recommends that health care professionals ensure women of childbearing age are fully aware of the risks of taking topiramate during pregnancy. The committee noted that alternative treatment options should be considered and the need for topiramate treatment should be reassessed at least annually.
The product information for topiramate-containing medicines will be updated to further highlight the risks for neurodevelopmental disorders and the additional safety measures to be taken.
Patients and health care professionals will be provided with educational materials regarding the risks of using topiramate during pregnancy, and a patient card will be provided to the patient with each medicine package. A visible warning will also be added to the outer packaging of the medicine.
The new PRAC recommendations will be sent to the Coordination Group for Mutual Recognition and Decentralised Procedures – Human (CMDh), which will adopt a position.
A version of this article first appeared on Medscape.com.
While it’s well known that topiramate can cause major congenital malformations and fetal growth restriction when used during pregnancy, recent data also suggest a possibly increased risk for neurodevelopmental disorders when topiramate is used during pregnancy, the EMA said in a statement.
The data include two observational studies that showed children born to mothers with epilepsy and who were exposed to topiramate in the womb may have a two- to threefold higher risk for neurodevelopmental disorders, in particular autism spectrum disorders (ASD), intellectual disability, or attention deficit hyperactivity disorder (ADHD), compared with children born to mothers with epilepsy not taking antiepileptic medication.
For patients using topiramate for the treatment of epilepsy, the PRAC now recommends that the medicine not be used during pregnancy unless no other suitable treatment is available.
The PRAC had also recommended a pregnancy prevention program to avoid exposure of the developing fetus to topiramate. “These measures will inform any woman or girl who is able to have children of the risks of taking topiramate during pregnancy and the need to avoid becoming pregnant while taking topiramate,” the EMA said.
Regardless of indication, the agency said topiramate should be used in women of childbearing age only when the following conditions of the pregnancy prevention program are met:
- A pregnancy test before starting treatment.
- Counseling about the risks of topiramate treatment and the need for highly effective contraception throughout treatment.
- A review of ongoing treatment at least annually by completion of a risk awareness form.
The PRAC recommends that health care professionals ensure women of childbearing age are fully aware of the risks of taking topiramate during pregnancy. The committee noted that alternative treatment options should be considered and the need for topiramate treatment should be reassessed at least annually.
The product information for topiramate-containing medicines will be updated to further highlight the risks for neurodevelopmental disorders and the additional safety measures to be taken.
Patients and health care professionals will be provided with educational materials regarding the risks of using topiramate during pregnancy, and a patient card will be provided to the patient with each medicine package. A visible warning will also be added to the outer packaging of the medicine.
The new PRAC recommendations will be sent to the Coordination Group for Mutual Recognition and Decentralised Procedures – Human (CMDh), which will adopt a position.
A version of this article first appeared on Medscape.com.
IQ and concussion recovery
Pediatric concussion is one of those rare phenomena in which we may be witnessing its emergence and clarification in a generation. When I was serving as the game doctor for our local high school football team in the 1970s, I and many other physicians had a very simplistic view of concussion. If the patient never lost conscious and had a reasonably intact short-term memory, we didn’t seriously entertain concussion as a diagnosis. “What’s the score and who is the president?” Were my favorite screening questions.
Obviously, we were underdiagnosing and mismanaging concussion. In part thanks to some high-profile athletes who suffered multiple concussions and eventually chronic traumatic encephalopathy (CTE) physicians began to realize that they should be looking more closely at children who sustained a head injury. The diagnostic criteria were expanded to include any injury that even temporarily effected brain function.
With the new appreciation for the risk of multiple concussions, the focus broadened to include the question of when is it safe for the athlete to return to competition. What signs or symptoms can the patient offer us so we can be sure his or her brain is sufficiently recovered? Here we stepped off into a deep abyss of ignorance. Fortunately, it became obvious fairly quickly that imaging studies weren’t going to help us, as they were invariably normal or at least didn’t tell us anything that wasn’t obvious on a physical exam.
If the patient had a headache, complained of dizziness, or manifested amnesia, monitoring the patient was fairly straightforward. But, in the absence of symptoms and no obvious way to determine the pace of recovery of an organ we couldn’t visualize, clinicians were pulling criteria and time tables out of thin air. Guessing that the concussed brain was in some ways like a torn muscle or overstretched tendon, “brain rest” was often suggested. So no TV, no reading, and certainly none of the cerebral challenging activity of school. Fortunately, we don’t hear much about the notion of brain rest anymore and there is at least one study that suggests that patients kept home from school recover more slowly.
But . Sometimes they describe headache or dizziness but often they complain of a vague mental unwellness. “Brain fog,” a term that has emerged in the wake of the COVID pandemic, might be an apt descriptor. Management of these slow recoverers has been a challenge.
However, two recent articles in the journal Pediatrics may provide some clarity and offer guidance in their management. In a study coming from the psychology department at Georgia State University, researchers reported that they have been able to find “no evidence of clinical meaningful differences in IQ after pediatric concussion.” In their words there is “strong evidence against reduced intelligence in the first few weeks to month after pediatric concussion.”
While their findings may simply toss the IQ onto the pile of worthless measures of healing, a companion commentary by Talin Babikian, PhD, a psychologist at the Semel Institute for Neuroscience and Human Behavior at UCLA, provides a more nuanced interpretation. He writes that if we are looking for an explanation when a patient’s recovery is taking longer than we might expect we need to look beyond some structural damage. Maybe the patient has a previously undiagnosed premorbid condition effecting his or her intellectual, cognitive, or learning abilities. Could the stall in improvement be the result of other symptoms? Here fatigue and sleep deprivation may be the culprits. Could some underlying emotional factor such as anxiety or depression be the problem? For example, I have seen patients whose fear of re-injury has prevented their return to full function. And, finally, the patient may be avoiding a “nonpreferred or challenging situation” unrelated to the injury.
In other words, the concussion may simply be the most obvious rip in a fabric that was already frayed and under stress. This kind of broad holistic (a word I usually like to avoid) thinking may be what is lacking as we struggle to understand other mysterious and chronic conditions such as Lyme disease and chronic fatigue syndrome.
While these two papers help provide some clarity in the management of pediatric concussion, what they fail to address is the bigger question of the relationship between head injury and CTE. The answers to that conundrum are enshrouded in a mix of politics and publicity that I doubt will clear in the near future.
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].
Pediatric concussion is one of those rare phenomena in which we may be witnessing its emergence and clarification in a generation. When I was serving as the game doctor for our local high school football team in the 1970s, I and many other physicians had a very simplistic view of concussion. If the patient never lost conscious and had a reasonably intact short-term memory, we didn’t seriously entertain concussion as a diagnosis. “What’s the score and who is the president?” Were my favorite screening questions.
Obviously, we were underdiagnosing and mismanaging concussion. In part thanks to some high-profile athletes who suffered multiple concussions and eventually chronic traumatic encephalopathy (CTE) physicians began to realize that they should be looking more closely at children who sustained a head injury. The diagnostic criteria were expanded to include any injury that even temporarily effected brain function.
With the new appreciation for the risk of multiple concussions, the focus broadened to include the question of when is it safe for the athlete to return to competition. What signs or symptoms can the patient offer us so we can be sure his or her brain is sufficiently recovered? Here we stepped off into a deep abyss of ignorance. Fortunately, it became obvious fairly quickly that imaging studies weren’t going to help us, as they were invariably normal or at least didn’t tell us anything that wasn’t obvious on a physical exam.
If the patient had a headache, complained of dizziness, or manifested amnesia, monitoring the patient was fairly straightforward. But, in the absence of symptoms and no obvious way to determine the pace of recovery of an organ we couldn’t visualize, clinicians were pulling criteria and time tables out of thin air. Guessing that the concussed brain was in some ways like a torn muscle or overstretched tendon, “brain rest” was often suggested. So no TV, no reading, and certainly none of the cerebral challenging activity of school. Fortunately, we don’t hear much about the notion of brain rest anymore and there is at least one study that suggests that patients kept home from school recover more slowly.
But . Sometimes they describe headache or dizziness but often they complain of a vague mental unwellness. “Brain fog,” a term that has emerged in the wake of the COVID pandemic, might be an apt descriptor. Management of these slow recoverers has been a challenge.
However, two recent articles in the journal Pediatrics may provide some clarity and offer guidance in their management. In a study coming from the psychology department at Georgia State University, researchers reported that they have been able to find “no evidence of clinical meaningful differences in IQ after pediatric concussion.” In their words there is “strong evidence against reduced intelligence in the first few weeks to month after pediatric concussion.”
While their findings may simply toss the IQ onto the pile of worthless measures of healing, a companion commentary by Talin Babikian, PhD, a psychologist at the Semel Institute for Neuroscience and Human Behavior at UCLA, provides a more nuanced interpretation. He writes that if we are looking for an explanation when a patient’s recovery is taking longer than we might expect we need to look beyond some structural damage. Maybe the patient has a previously undiagnosed premorbid condition effecting his or her intellectual, cognitive, or learning abilities. Could the stall in improvement be the result of other symptoms? Here fatigue and sleep deprivation may be the culprits. Could some underlying emotional factor such as anxiety or depression be the problem? For example, I have seen patients whose fear of re-injury has prevented their return to full function. And, finally, the patient may be avoiding a “nonpreferred or challenging situation” unrelated to the injury.
In other words, the concussion may simply be the most obvious rip in a fabric that was already frayed and under stress. This kind of broad holistic (a word I usually like to avoid) thinking may be what is lacking as we struggle to understand other mysterious and chronic conditions such as Lyme disease and chronic fatigue syndrome.
While these two papers help provide some clarity in the management of pediatric concussion, what they fail to address is the bigger question of the relationship between head injury and CTE. The answers to that conundrum are enshrouded in a mix of politics and publicity that I doubt will clear in the near future.
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].
Pediatric concussion is one of those rare phenomena in which we may be witnessing its emergence and clarification in a generation. When I was serving as the game doctor for our local high school football team in the 1970s, I and many other physicians had a very simplistic view of concussion. If the patient never lost conscious and had a reasonably intact short-term memory, we didn’t seriously entertain concussion as a diagnosis. “What’s the score and who is the president?” Were my favorite screening questions.
Obviously, we were underdiagnosing and mismanaging concussion. In part thanks to some high-profile athletes who suffered multiple concussions and eventually chronic traumatic encephalopathy (CTE) physicians began to realize that they should be looking more closely at children who sustained a head injury. The diagnostic criteria were expanded to include any injury that even temporarily effected brain function.
With the new appreciation for the risk of multiple concussions, the focus broadened to include the question of when is it safe for the athlete to return to competition. What signs or symptoms can the patient offer us so we can be sure his or her brain is sufficiently recovered? Here we stepped off into a deep abyss of ignorance. Fortunately, it became obvious fairly quickly that imaging studies weren’t going to help us, as they were invariably normal or at least didn’t tell us anything that wasn’t obvious on a physical exam.
If the patient had a headache, complained of dizziness, or manifested amnesia, monitoring the patient was fairly straightforward. But, in the absence of symptoms and no obvious way to determine the pace of recovery of an organ we couldn’t visualize, clinicians were pulling criteria and time tables out of thin air. Guessing that the concussed brain was in some ways like a torn muscle or overstretched tendon, “brain rest” was often suggested. So no TV, no reading, and certainly none of the cerebral challenging activity of school. Fortunately, we don’t hear much about the notion of brain rest anymore and there is at least one study that suggests that patients kept home from school recover more slowly.
But . Sometimes they describe headache or dizziness but often they complain of a vague mental unwellness. “Brain fog,” a term that has emerged in the wake of the COVID pandemic, might be an apt descriptor. Management of these slow recoverers has been a challenge.
However, two recent articles in the journal Pediatrics may provide some clarity and offer guidance in their management. In a study coming from the psychology department at Georgia State University, researchers reported that they have been able to find “no evidence of clinical meaningful differences in IQ after pediatric concussion.” In their words there is “strong evidence against reduced intelligence in the first few weeks to month after pediatric concussion.”
While their findings may simply toss the IQ onto the pile of worthless measures of healing, a companion commentary by Talin Babikian, PhD, a psychologist at the Semel Institute for Neuroscience and Human Behavior at UCLA, provides a more nuanced interpretation. He writes that if we are looking for an explanation when a patient’s recovery is taking longer than we might expect we need to look beyond some structural damage. Maybe the patient has a previously undiagnosed premorbid condition effecting his or her intellectual, cognitive, or learning abilities. Could the stall in improvement be the result of other symptoms? Here fatigue and sleep deprivation may be the culprits. Could some underlying emotional factor such as anxiety or depression be the problem? For example, I have seen patients whose fear of re-injury has prevented their return to full function. And, finally, the patient may be avoiding a “nonpreferred or challenging situation” unrelated to the injury.
In other words, the concussion may simply be the most obvious rip in a fabric that was already frayed and under stress. This kind of broad holistic (a word I usually like to avoid) thinking may be what is lacking as we struggle to understand other mysterious and chronic conditions such as Lyme disease and chronic fatigue syndrome.
While these two papers help provide some clarity in the management of pediatric concussion, what they fail to address is the bigger question of the relationship between head injury and CTE. The answers to that conundrum are enshrouded in a mix of politics and publicity that I doubt will clear in the near future.
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].
Abdominal fat linked to lower brain volume in midlife
In a large study of healthy middle-aged adults, greater visceral and subcutaneous abdominal fat on abdominal MRI predicted brain atrophy on imaging, especially in women.
“The study shows that excess fat is bad for the brain and worse in women, including in Alzheimer’s disease risk regions,” lead author Cyrus Raji, MD, PhD, with the Mallinckrodt Institute of Radiology, Washington University, St. Louis, Mo., said in an interview.
The study was published online in the journal Aging and Disease
Modifiable risk factor
Multiple studies have suggested a connection between body fat accumulation and increased dementia risk. But few have examined the relationship between types of fat (visceral and subcutaneous) and brain volume.
For the new study, 10,000 healthy adults aged 20-80 years (mean age, 52.9 years; 53% men) underwent a short whole-body MRI protocol. Regression analyses of abdominal fat types and normalized brain volumes were evaluated, controlling for age and sex.
The research team found that higher amounts of both visceral and subcutaneous abdominal fat predicted lower total gray and white matter volume, as well as lower volume in the hippocampus, frontal cortex, and temporal, parietal, and occipital lobes.
“The findings are quite dramatic,” Dr. Raji told this news organization. “Overall, we found that both subcutaneous and visceral fat has similar levels of negative relationships with brain volumes.”
Women had a higher burden of brain atrophy with increased visceral fat than men. However, it’s difficult to place the sex differences in context because of the lack of prior work specifically investigating visceral fat, brain volume loss, and sex differences, the researchers caution.
They also note that while statistically significant relationships were observed between visceral fat levels and gray matter volume changes, their effect sizes were generally small.
“Thus, the statistical significance of this work is influenced by the large sample size and less so by large effect size in any given set of regions,” the investigators write.
Other limitations include the cross-sectional nature of the study, which precludes conclusions about causality. The analysis also did not account for other lifestyle factors such as physical activity, diet, and genetic variables.
The researchers call for further investigation “to better elucidate underlying mechanisms and discover possible interventions targeting abdominal fat reduction as a strategy to maintain brain health.”
‘Helpful addition to the literature’
In a comment, Claire Sexton, DPhil, Alzheimer’s Association senior director of scientific programs and outreach, noted that “previous studies have linked obesity with cognitive decline and increased risk of dementia. Rather than using BMI as a proxy for body fat, the current study examined visceral and subcutaneous fat directly using imaging techniques.”
Dr. Sexton, who was not associated with this study, said the finding that increased body fat was associated with reduced brain volumes suggests “a possible mechanism to explain the previously reported associations between obesity and cognition.”
“Though some degree of atrophy and brain shrinkage is common with old age, awareness of this association is important because reduced brain volume may be associated with problems with thinking, memory, and performing everyday tasks, and because rates of obesity continue to rise in the United States, along with obesity-related conditions including heart disease, stroke, type 2 diabetes and certain types of cancer,” she added.
“While a helpful addition to the literature, the study does have important limitations. As an observational study, it cannot establish whether higher levels of body fat directly causes reduced brain volumes,” Dr. Sexton cautioned.
In addition, the study did not take into account important related factors like physical activity and diet, which may influence any relationship between body fat and brain volumes, she noted. “Overall, it is not just one factor that is important to consider when considering risk for cognitive decline and dementia, but multiple factors.
“Obesity and the location of body fat must be considered in combination with one’s total lived experience and habits, including physical activity, education, head injury, sleep, mental health, and the health of your heart/cardiovascular system and other key bodily systems,” Dr. Sexton said.
The Alzheimer’s Association is leading a 2-year clinical trial known as U.S. POINTER to see whether combining physical activity, healthy nutrition, social and intellectual challenges, and improved self-management of medical conditions can protect cognitive function in older adults who are at increased risk for cognitive decline.
This work was supported in part by Providence St. Joseph Health in Seattle; Saint John’s Health Center Foundation; Pacific Neuroscience Institute and Foundation; Will and Cary Singleton; and the McLoughlin family. Dr. Raji is a consultant for Brainreader, Apollo Health, Voxelwise, Neurevolution, Pacific Neuroscience Institute Foundation, and Icometrix. Dr. Sexton reports no relevant financial relationships.
A version of this article first appeared on Medscape.com.
In a large study of healthy middle-aged adults, greater visceral and subcutaneous abdominal fat on abdominal MRI predicted brain atrophy on imaging, especially in women.
“The study shows that excess fat is bad for the brain and worse in women, including in Alzheimer’s disease risk regions,” lead author Cyrus Raji, MD, PhD, with the Mallinckrodt Institute of Radiology, Washington University, St. Louis, Mo., said in an interview.
The study was published online in the journal Aging and Disease
Modifiable risk factor
Multiple studies have suggested a connection between body fat accumulation and increased dementia risk. But few have examined the relationship between types of fat (visceral and subcutaneous) and brain volume.
For the new study, 10,000 healthy adults aged 20-80 years (mean age, 52.9 years; 53% men) underwent a short whole-body MRI protocol. Regression analyses of abdominal fat types and normalized brain volumes were evaluated, controlling for age and sex.
The research team found that higher amounts of both visceral and subcutaneous abdominal fat predicted lower total gray and white matter volume, as well as lower volume in the hippocampus, frontal cortex, and temporal, parietal, and occipital lobes.
“The findings are quite dramatic,” Dr. Raji told this news organization. “Overall, we found that both subcutaneous and visceral fat has similar levels of negative relationships with brain volumes.”
Women had a higher burden of brain atrophy with increased visceral fat than men. However, it’s difficult to place the sex differences in context because of the lack of prior work specifically investigating visceral fat, brain volume loss, and sex differences, the researchers caution.
They also note that while statistically significant relationships were observed between visceral fat levels and gray matter volume changes, their effect sizes were generally small.
“Thus, the statistical significance of this work is influenced by the large sample size and less so by large effect size in any given set of regions,” the investigators write.
Other limitations include the cross-sectional nature of the study, which precludes conclusions about causality. The analysis also did not account for other lifestyle factors such as physical activity, diet, and genetic variables.
The researchers call for further investigation “to better elucidate underlying mechanisms and discover possible interventions targeting abdominal fat reduction as a strategy to maintain brain health.”
‘Helpful addition to the literature’
In a comment, Claire Sexton, DPhil, Alzheimer’s Association senior director of scientific programs and outreach, noted that “previous studies have linked obesity with cognitive decline and increased risk of dementia. Rather than using BMI as a proxy for body fat, the current study examined visceral and subcutaneous fat directly using imaging techniques.”
Dr. Sexton, who was not associated with this study, said the finding that increased body fat was associated with reduced brain volumes suggests “a possible mechanism to explain the previously reported associations between obesity and cognition.”
“Though some degree of atrophy and brain shrinkage is common with old age, awareness of this association is important because reduced brain volume may be associated with problems with thinking, memory, and performing everyday tasks, and because rates of obesity continue to rise in the United States, along with obesity-related conditions including heart disease, stroke, type 2 diabetes and certain types of cancer,” she added.
“While a helpful addition to the literature, the study does have important limitations. As an observational study, it cannot establish whether higher levels of body fat directly causes reduced brain volumes,” Dr. Sexton cautioned.
In addition, the study did not take into account important related factors like physical activity and diet, which may influence any relationship between body fat and brain volumes, she noted. “Overall, it is not just one factor that is important to consider when considering risk for cognitive decline and dementia, but multiple factors.
“Obesity and the location of body fat must be considered in combination with one’s total lived experience and habits, including physical activity, education, head injury, sleep, mental health, and the health of your heart/cardiovascular system and other key bodily systems,” Dr. Sexton said.
The Alzheimer’s Association is leading a 2-year clinical trial known as U.S. POINTER to see whether combining physical activity, healthy nutrition, social and intellectual challenges, and improved self-management of medical conditions can protect cognitive function in older adults who are at increased risk for cognitive decline.
This work was supported in part by Providence St. Joseph Health in Seattle; Saint John’s Health Center Foundation; Pacific Neuroscience Institute and Foundation; Will and Cary Singleton; and the McLoughlin family. Dr. Raji is a consultant for Brainreader, Apollo Health, Voxelwise, Neurevolution, Pacific Neuroscience Institute Foundation, and Icometrix. Dr. Sexton reports no relevant financial relationships.
A version of this article first appeared on Medscape.com.
In a large study of healthy middle-aged adults, greater visceral and subcutaneous abdominal fat on abdominal MRI predicted brain atrophy on imaging, especially in women.
“The study shows that excess fat is bad for the brain and worse in women, including in Alzheimer’s disease risk regions,” lead author Cyrus Raji, MD, PhD, with the Mallinckrodt Institute of Radiology, Washington University, St. Louis, Mo., said in an interview.
The study was published online in the journal Aging and Disease
Modifiable risk factor
Multiple studies have suggested a connection between body fat accumulation and increased dementia risk. But few have examined the relationship between types of fat (visceral and subcutaneous) and brain volume.
For the new study, 10,000 healthy adults aged 20-80 years (mean age, 52.9 years; 53% men) underwent a short whole-body MRI protocol. Regression analyses of abdominal fat types and normalized brain volumes were evaluated, controlling for age and sex.
The research team found that higher amounts of both visceral and subcutaneous abdominal fat predicted lower total gray and white matter volume, as well as lower volume in the hippocampus, frontal cortex, and temporal, parietal, and occipital lobes.
“The findings are quite dramatic,” Dr. Raji told this news organization. “Overall, we found that both subcutaneous and visceral fat has similar levels of negative relationships with brain volumes.”
Women had a higher burden of brain atrophy with increased visceral fat than men. However, it’s difficult to place the sex differences in context because of the lack of prior work specifically investigating visceral fat, brain volume loss, and sex differences, the researchers caution.
They also note that while statistically significant relationships were observed between visceral fat levels and gray matter volume changes, their effect sizes were generally small.
“Thus, the statistical significance of this work is influenced by the large sample size and less so by large effect size in any given set of regions,” the investigators write.
Other limitations include the cross-sectional nature of the study, which precludes conclusions about causality. The analysis also did not account for other lifestyle factors such as physical activity, diet, and genetic variables.
The researchers call for further investigation “to better elucidate underlying mechanisms and discover possible interventions targeting abdominal fat reduction as a strategy to maintain brain health.”
‘Helpful addition to the literature’
In a comment, Claire Sexton, DPhil, Alzheimer’s Association senior director of scientific programs and outreach, noted that “previous studies have linked obesity with cognitive decline and increased risk of dementia. Rather than using BMI as a proxy for body fat, the current study examined visceral and subcutaneous fat directly using imaging techniques.”
Dr. Sexton, who was not associated with this study, said the finding that increased body fat was associated with reduced brain volumes suggests “a possible mechanism to explain the previously reported associations between obesity and cognition.”
“Though some degree of atrophy and brain shrinkage is common with old age, awareness of this association is important because reduced brain volume may be associated with problems with thinking, memory, and performing everyday tasks, and because rates of obesity continue to rise in the United States, along with obesity-related conditions including heart disease, stroke, type 2 diabetes and certain types of cancer,” she added.
“While a helpful addition to the literature, the study does have important limitations. As an observational study, it cannot establish whether higher levels of body fat directly causes reduced brain volumes,” Dr. Sexton cautioned.
In addition, the study did not take into account important related factors like physical activity and diet, which may influence any relationship between body fat and brain volumes, she noted. “Overall, it is not just one factor that is important to consider when considering risk for cognitive decline and dementia, but multiple factors.
“Obesity and the location of body fat must be considered in combination with one’s total lived experience and habits, including physical activity, education, head injury, sleep, mental health, and the health of your heart/cardiovascular system and other key bodily systems,” Dr. Sexton said.
The Alzheimer’s Association is leading a 2-year clinical trial known as U.S. POINTER to see whether combining physical activity, healthy nutrition, social and intellectual challenges, and improved self-management of medical conditions can protect cognitive function in older adults who are at increased risk for cognitive decline.
This work was supported in part by Providence St. Joseph Health in Seattle; Saint John’s Health Center Foundation; Pacific Neuroscience Institute and Foundation; Will and Cary Singleton; and the McLoughlin family. Dr. Raji is a consultant for Brainreader, Apollo Health, Voxelwise, Neurevolution, Pacific Neuroscience Institute Foundation, and Icometrix. Dr. Sexton reports no relevant financial relationships.
A version of this article first appeared on Medscape.com.
FROM AGING AND DISEASES
These four GI conditions may predict Parkinson’s disease
Early detection of these conditions might help identify patients at risk for PD, potentially prompting preventive strategies, the researchers suggest.
The results of previous experimental studies by the team supported the Braak hypothesis, which states that idiopathic PD originates in the gut in a subset of patients. However, no previous study had investigated a broad range of gastrointestinal symptoms and syndromes that might occur prior to a PD diagnosis.
Given their preclinical work, the authors were not surprised to find that certain GI syndromes were specifically associated with PD, even when compared with Alzheimer’s disease (AD) and cerebrovascular disease (CVD), principal author Pankaj Jay Pasricha, MBBS, MD, of Mayo Clinic Arizona, Scottsdale, said in an interview. However, they were “impressed by the strength of the associations.”
“Experts have known for a very long time that constipation is a potential risk factor for PD, so this study adds to the list of GI conditions that could potentially be risk factors,” he said.
The study was published online in Gut.
Studies converge
To determine the incidence of GI syndromes and interventions preceding PD, the investigators performed a combined case-control and cohort study using a U.S.-based nationwide medical record network.
First, they compared 24,624 individuals with new-onset idiopathic PD with the same number of matched negative controls (NCs), as well as 19,046 people with AD and 23,942 with CVD to investigate the presence of preexisting GI conditions, which the researchers referred to as “exposures.” Overall, the mean age was about 70, and about half of those studied were women.
Eighteen conditions covering the entire GI tract were investigated. These included achalasia, dysphagia, gastroesophageal reflux disease, gastroparesis, functional dyspepsia, paralytic ileus, diarrhea, irritable bowel syndrome (IBS) with and without diarrhea, intestinal pseudo-obstruction, fecal incontinence, Crohn’s disease, ulcerative colitis, and microscopic colitis, as well as appendectomy and vagotomy.
All GI syndromes were significantly increased in the PD group, compared with NCs (odds ratio > 1). However, only preexisting dysphagia (OR, 3.58), gastroparesis (OR, 4.64), functional dyspepsia (OR, 3.39), intestinal pseudo-obstruction (OR, 3.01), diarrhea (OR, 2.85), constipation (OR, 3.32), IBS with constipation (OR, 4.11), IBS with diarrhea (OR, 4.31), IBS without diarrhea (OR, 3.53), and fecal incontinence (OR, 3.76) produced ORs that were numerically greater than the upper limit of the negative exposures.
In addition, only gastroparesis, dysphagia, IBS with constipation, IBS without diarrhea, and constipation were specific for PD, compared with the AD and CVD groups (OR > 1). After correction for false discovery rate, though, gastroparesis and constipation did not remain significantly different, compared with the AD and CVD groups.
Other preexisting GI conditions not only were significantly associated with PD but also showed strong associations with the AD and CVD groups.
To validate the case-control analyses, the team set up a complementary cohort study. Eighteen cohorts – each diagnosed with one of the GI conditions in the case-control analysis – were compared with their respective NC cohorts for the prospective risk of developing PD, AD, or CVD within 5 years.
Gastroparesis, dysphagia, IBS without diarrhea, and constipation showed specific associations with PD versus NCs, AD, and CVD in the cohort analysis. Their relative risks versus NCs were 2.43, 2.27, 1.17, and 2.38, respectively.
Functional dyspepsia, IBS with diarrhea, diarrhea, and fecal incontinence were not PD specific, but IBS with constipation and intestinal pseudo-obstruction showed PD specificity in both the case-control (OR, 4.11) and cohort analyses (RR, 1.84).
Appendectomy decreased the risk for PD in the cohort analysis (RR, 0.48), but neither inflammatory bowel disease nor vagotomy was associated with PD.
“This study is the first to establish substantial observational evidence that the clinical diagnosis of not only constipation but also dysphagia, gastroparesis, and IBS without diarrhea might specifically predict the development of PD, whereas other exposures were less specific,” the researchers wrote.
However, Dr. Pasricha said, “there is no need for alarm.” Clinicians should reassure patients that “the overall risk for developing PD is low. The overwhelming majority of patients with these GI conditions will never develop PD.”
His team will be doing experimental work on the biological mechanisms that might explain the current study’s findings. “In addition, the U.S. National Institutes of Health has issued a call for proposals to perform research in patients that could help understand these associations better,” he said.
Body or brain?
The Parkinson’s Foundation’s National Medical Advisor, Michael S. Okun, MD, called the study “fascinating.”
The findings “confirm many other studies showing that GI symptoms can precede a Parkinson’s disease diagnosis,” he said in an interview.
Although the study was designed to test the Braak hypothesis, “the dataset really cannot confirm or refute Braak pathology, which can only be accomplished with comparison to postmortem samples,” he added.
“The raging debate in the field of body-first versus brain-first Parkinson’s may be somewhat artificial, especially if we consider that Parkinson’s is not one disease,” Dr. Okun noted. “It will take clinical data, pathology, and the collaboration of many researchers to solve the puzzle.”
“The Foundation continues to monitor all the advancements in the ‘gut’ Parkinson field,” he said. “We do not recommend at this time changing the approach to clinical care based on this data.”
No funding or competing interests were declared. Dr. Okun declared no relevant disclosures.
A version of this article first appeared on Medscape.com.
Early detection of these conditions might help identify patients at risk for PD, potentially prompting preventive strategies, the researchers suggest.
The results of previous experimental studies by the team supported the Braak hypothesis, which states that idiopathic PD originates in the gut in a subset of patients. However, no previous study had investigated a broad range of gastrointestinal symptoms and syndromes that might occur prior to a PD diagnosis.
Given their preclinical work, the authors were not surprised to find that certain GI syndromes were specifically associated with PD, even when compared with Alzheimer’s disease (AD) and cerebrovascular disease (CVD), principal author Pankaj Jay Pasricha, MBBS, MD, of Mayo Clinic Arizona, Scottsdale, said in an interview. However, they were “impressed by the strength of the associations.”
“Experts have known for a very long time that constipation is a potential risk factor for PD, so this study adds to the list of GI conditions that could potentially be risk factors,” he said.
The study was published online in Gut.
Studies converge
To determine the incidence of GI syndromes and interventions preceding PD, the investigators performed a combined case-control and cohort study using a U.S.-based nationwide medical record network.
First, they compared 24,624 individuals with new-onset idiopathic PD with the same number of matched negative controls (NCs), as well as 19,046 people with AD and 23,942 with CVD to investigate the presence of preexisting GI conditions, which the researchers referred to as “exposures.” Overall, the mean age was about 70, and about half of those studied were women.
Eighteen conditions covering the entire GI tract were investigated. These included achalasia, dysphagia, gastroesophageal reflux disease, gastroparesis, functional dyspepsia, paralytic ileus, diarrhea, irritable bowel syndrome (IBS) with and without diarrhea, intestinal pseudo-obstruction, fecal incontinence, Crohn’s disease, ulcerative colitis, and microscopic colitis, as well as appendectomy and vagotomy.
All GI syndromes were significantly increased in the PD group, compared with NCs (odds ratio > 1). However, only preexisting dysphagia (OR, 3.58), gastroparesis (OR, 4.64), functional dyspepsia (OR, 3.39), intestinal pseudo-obstruction (OR, 3.01), diarrhea (OR, 2.85), constipation (OR, 3.32), IBS with constipation (OR, 4.11), IBS with diarrhea (OR, 4.31), IBS without diarrhea (OR, 3.53), and fecal incontinence (OR, 3.76) produced ORs that were numerically greater than the upper limit of the negative exposures.
In addition, only gastroparesis, dysphagia, IBS with constipation, IBS without diarrhea, and constipation were specific for PD, compared with the AD and CVD groups (OR > 1). After correction for false discovery rate, though, gastroparesis and constipation did not remain significantly different, compared with the AD and CVD groups.
Other preexisting GI conditions not only were significantly associated with PD but also showed strong associations with the AD and CVD groups.
To validate the case-control analyses, the team set up a complementary cohort study. Eighteen cohorts – each diagnosed with one of the GI conditions in the case-control analysis – were compared with their respective NC cohorts for the prospective risk of developing PD, AD, or CVD within 5 years.
Gastroparesis, dysphagia, IBS without diarrhea, and constipation showed specific associations with PD versus NCs, AD, and CVD in the cohort analysis. Their relative risks versus NCs were 2.43, 2.27, 1.17, and 2.38, respectively.
Functional dyspepsia, IBS with diarrhea, diarrhea, and fecal incontinence were not PD specific, but IBS with constipation and intestinal pseudo-obstruction showed PD specificity in both the case-control (OR, 4.11) and cohort analyses (RR, 1.84).
Appendectomy decreased the risk for PD in the cohort analysis (RR, 0.48), but neither inflammatory bowel disease nor vagotomy was associated with PD.
“This study is the first to establish substantial observational evidence that the clinical diagnosis of not only constipation but also dysphagia, gastroparesis, and IBS without diarrhea might specifically predict the development of PD, whereas other exposures were less specific,” the researchers wrote.
However, Dr. Pasricha said, “there is no need for alarm.” Clinicians should reassure patients that “the overall risk for developing PD is low. The overwhelming majority of patients with these GI conditions will never develop PD.”
His team will be doing experimental work on the biological mechanisms that might explain the current study’s findings. “In addition, the U.S. National Institutes of Health has issued a call for proposals to perform research in patients that could help understand these associations better,” he said.
Body or brain?
The Parkinson’s Foundation’s National Medical Advisor, Michael S. Okun, MD, called the study “fascinating.”
The findings “confirm many other studies showing that GI symptoms can precede a Parkinson’s disease diagnosis,” he said in an interview.
Although the study was designed to test the Braak hypothesis, “the dataset really cannot confirm or refute Braak pathology, which can only be accomplished with comparison to postmortem samples,” he added.
“The raging debate in the field of body-first versus brain-first Parkinson’s may be somewhat artificial, especially if we consider that Parkinson’s is not one disease,” Dr. Okun noted. “It will take clinical data, pathology, and the collaboration of many researchers to solve the puzzle.”
“The Foundation continues to monitor all the advancements in the ‘gut’ Parkinson field,” he said. “We do not recommend at this time changing the approach to clinical care based on this data.”
No funding or competing interests were declared. Dr. Okun declared no relevant disclosures.
A version of this article first appeared on Medscape.com.
Early detection of these conditions might help identify patients at risk for PD, potentially prompting preventive strategies, the researchers suggest.
The results of previous experimental studies by the team supported the Braak hypothesis, which states that idiopathic PD originates in the gut in a subset of patients. However, no previous study had investigated a broad range of gastrointestinal symptoms and syndromes that might occur prior to a PD diagnosis.
Given their preclinical work, the authors were not surprised to find that certain GI syndromes were specifically associated with PD, even when compared with Alzheimer’s disease (AD) and cerebrovascular disease (CVD), principal author Pankaj Jay Pasricha, MBBS, MD, of Mayo Clinic Arizona, Scottsdale, said in an interview. However, they were “impressed by the strength of the associations.”
“Experts have known for a very long time that constipation is a potential risk factor for PD, so this study adds to the list of GI conditions that could potentially be risk factors,” he said.
The study was published online in Gut.
Studies converge
To determine the incidence of GI syndromes and interventions preceding PD, the investigators performed a combined case-control and cohort study using a U.S.-based nationwide medical record network.
First, they compared 24,624 individuals with new-onset idiopathic PD with the same number of matched negative controls (NCs), as well as 19,046 people with AD and 23,942 with CVD to investigate the presence of preexisting GI conditions, which the researchers referred to as “exposures.” Overall, the mean age was about 70, and about half of those studied were women.
Eighteen conditions covering the entire GI tract were investigated. These included achalasia, dysphagia, gastroesophageal reflux disease, gastroparesis, functional dyspepsia, paralytic ileus, diarrhea, irritable bowel syndrome (IBS) with and without diarrhea, intestinal pseudo-obstruction, fecal incontinence, Crohn’s disease, ulcerative colitis, and microscopic colitis, as well as appendectomy and vagotomy.
All GI syndromes were significantly increased in the PD group, compared with NCs (odds ratio > 1). However, only preexisting dysphagia (OR, 3.58), gastroparesis (OR, 4.64), functional dyspepsia (OR, 3.39), intestinal pseudo-obstruction (OR, 3.01), diarrhea (OR, 2.85), constipation (OR, 3.32), IBS with constipation (OR, 4.11), IBS with diarrhea (OR, 4.31), IBS without diarrhea (OR, 3.53), and fecal incontinence (OR, 3.76) produced ORs that were numerically greater than the upper limit of the negative exposures.
In addition, only gastroparesis, dysphagia, IBS with constipation, IBS without diarrhea, and constipation were specific for PD, compared with the AD and CVD groups (OR > 1). After correction for false discovery rate, though, gastroparesis and constipation did not remain significantly different, compared with the AD and CVD groups.
Other preexisting GI conditions not only were significantly associated with PD but also showed strong associations with the AD and CVD groups.
To validate the case-control analyses, the team set up a complementary cohort study. Eighteen cohorts – each diagnosed with one of the GI conditions in the case-control analysis – were compared with their respective NC cohorts for the prospective risk of developing PD, AD, or CVD within 5 years.
Gastroparesis, dysphagia, IBS without diarrhea, and constipation showed specific associations with PD versus NCs, AD, and CVD in the cohort analysis. Their relative risks versus NCs were 2.43, 2.27, 1.17, and 2.38, respectively.
Functional dyspepsia, IBS with diarrhea, diarrhea, and fecal incontinence were not PD specific, but IBS with constipation and intestinal pseudo-obstruction showed PD specificity in both the case-control (OR, 4.11) and cohort analyses (RR, 1.84).
Appendectomy decreased the risk for PD in the cohort analysis (RR, 0.48), but neither inflammatory bowel disease nor vagotomy was associated with PD.
“This study is the first to establish substantial observational evidence that the clinical diagnosis of not only constipation but also dysphagia, gastroparesis, and IBS without diarrhea might specifically predict the development of PD, whereas other exposures were less specific,” the researchers wrote.
However, Dr. Pasricha said, “there is no need for alarm.” Clinicians should reassure patients that “the overall risk for developing PD is low. The overwhelming majority of patients with these GI conditions will never develop PD.”
His team will be doing experimental work on the biological mechanisms that might explain the current study’s findings. “In addition, the U.S. National Institutes of Health has issued a call for proposals to perform research in patients that could help understand these associations better,” he said.
Body or brain?
The Parkinson’s Foundation’s National Medical Advisor, Michael S. Okun, MD, called the study “fascinating.”
The findings “confirm many other studies showing that GI symptoms can precede a Parkinson’s disease diagnosis,” he said in an interview.
Although the study was designed to test the Braak hypothesis, “the dataset really cannot confirm or refute Braak pathology, which can only be accomplished with comparison to postmortem samples,” he added.
“The raging debate in the field of body-first versus brain-first Parkinson’s may be somewhat artificial, especially if we consider that Parkinson’s is not one disease,” Dr. Okun noted. “It will take clinical data, pathology, and the collaboration of many researchers to solve the puzzle.”
“The Foundation continues to monitor all the advancements in the ‘gut’ Parkinson field,” he said. “We do not recommend at this time changing the approach to clinical care based on this data.”
No funding or competing interests were declared. Dr. Okun declared no relevant disclosures.
A version of this article first appeared on Medscape.com.
FROM GUT
FDA to step up oversight of cosmetics, assess ‘forever chemicals’
They are also preparing to assess potential risks of so-called forever chemicals in these products.
The Food and Drug Administration last year gained new authority over cosmetics when Congress passed the Modernization of Cosmetics Regulation Act of 2022 (MoCRA) by adding this bill to a December budget package.
“On average, consumers in the U.S. use six to 12 cosmetics products daily. But, until recently the FDA didn’t have the authority to require manufacturers to submit cosmetic product listings, including a list of ingredients used in these products, or register the facilities where they were produced,” Namandjé Bumpus, PhD, FDA’s chief scientist, said in a press release.
In the statement, the FDA announced the release of a draft guidance document that is intended to help companies comply with the transparency requirements slated to kick in this December. The agency is accepting comments on this draft guidance through Sept. 7.
“Later this year, registration and listing of cosmetic product facilities and products will become a requirement, making information about cosmetic products, including the ingredients used in products and the facilities where they are produced, readily available to the agency,” Dr. Bumpus said.
The products, according to the FDA statement, include makeup, nail polishes, shaving creams, other grooming products, perfumes, face and body cleansers, hair products, moisturizers, and other skin care items.
MoCRA “represents a sea change in how FDA regulates the cosmetics industry,” attorneys Frederick R. Ball, Alyson Walker Lotman, and Kelly A. Bonner, wrote in an article for the Food and Drug Law Institute published in spring 2023.
The FDA has called the MoCRA law “the most significant expansion” of its authority to regulate cosmetics since the Federal Food, Drug, and Cosmetic Act was passed in 1938.
The agency is in the process of expanding its staff to carry out newly authorized duties, including the tracking of adverse events. The FDA budget request for fiscal 2024, which begins Oct. 1, seeks $5 million for work needed to implement MoCRA.
PFAS, or ‘forever chemicals’
Some of the requested FDA funding is intended to prepare the agency to assess the use of per-and polyfluoroalkyl substances (PFAS) in cosmetics.
MoCRA sets a 3-year deadline for the FDA to issue an assessment of the use and potential risks of PFAS in cosmetics products. PFAS are sometimes added as ingredients in some cosmetic products, including lotions, cleansers, nail polish, shaving cream, foundation, lipstick, eyeliner, eyeshadow, and mascara, according to the FDA. Sometimes the presence of PFAS in cosmetics is unintentional and is the result of impurities in raw materials or is due to the breakdown of ingredients, the FDA said.
The FDA’s website says that so far, the available research doesn’t allow for “definitive conclusions about the potential health risks of PFAS in cosmetics.”
The Centers for Disease Control and Prevention has stated that research has suggested potential links between high levels of certain PFAS, in general, with increased cholesterol levels, changes in liver enzyme levels, increased risk of hypertension or preeclampsia in pregnant women, and increased risk of kidney or testicular cancer.
PFAS compounds often are used to resist grease, oil, water, and heat in industrial settings. They are used in thousands of products, from nonstick cookware to firefighting foams and protective gear, because they can reduce friction, according to a National Academies of Sciences, Engineering, and Medicine report on PFAS that was issued last year.
PFAS are known as “forever chemicals” because they contain a carbon-fluorine bond, which does not break naturally. Even when PFAS are transformed in the body, they can assume other forms of PFAS that preserve the troublesome carbon-fluorine bond. With PFAS, the human body is confronted with a substance it doesn’t have the tools to process.
This is in contrast to proteins and carbohydrates, which are in a sense prepackaged for relatively easy disassembly in the human body. Many of these compounds have weak links that enzymes and stomach acid can take apart, such as sulfur-to-sulfur (disulfide) bonds. That’s why protein-based biotech drugs are injected instead of administered as pills. The ultimate goal of this digestion is for the body to gain energy from these compounds.
But with PFAS, the body faces the challenge of carbon-fluorine bonds that are very hard to break down, and there is no payoff for these efforts, Graham F. Peaslee, PhD, professor of physics at the University of Notre Dame (Indiana), told this news organization.
“Nothing will naturally eat it because when you break the bond, it’s like eating celery,” he said. “You use more calories to eat the celery than you gain back from it.”
Interest from a U.S. senator
Dr. Peaslee was one of the authors of a 2021 article about PFAS in cosmetics that appeared in the journal Environmental Science and Technology Letters.
In the article, Dr. Peaslee and colleagues reported on their screening of 231 cosmetic products purchased in the United States and Canada using particle-induced gamma-ray emission spectroscopy. They found cases of undisclosed PFAS in cosmetic products. Foundations, mascaras, and lip products were noted as being especially problematic.
Sen. Susan Collins (R-ME) cited Dr. Peaslee’s article in a 2021 floor speech as she argued for having the FDA ban the intentional addition of PFAS to cosmetics.
“The findings of this study are particularly alarming, as many of these products are subject to direct human exposure,” Sen. Collins said. “For example, lipstick is often inadvertently ingested, and mascara is sometimes absorbed through tear ducts.”
In addition, workers at cosmetics plants may be exposed to PFAS and discarded cosmetics that have these compounds, which could potentially contaminate drinking water, Sen. Collins said. In 2021, she introduced legislation seeking a ban on PFAS that are intentionally added to cosmetics. That legislation did not advance through the Senate.
But the Senate Appropriations Committee, on which Sen. Collins is the ranking Republican, wants the FDA to keep a ban on PFAS in mind.
The Senate Agriculture Appropriations subcommittee, which oversees the FDA’s budget, raised the issue of PFAS and cosmetics in a June report. The FDA should develop a plan outlining research needed to inform “regulatory decision making, including potential development of a proposed rule to ban intentionally added PFAS substances in cosmetics,” the subcommittee said.
A version of this article first appeared on Medscape.com.
They are also preparing to assess potential risks of so-called forever chemicals in these products.
The Food and Drug Administration last year gained new authority over cosmetics when Congress passed the Modernization of Cosmetics Regulation Act of 2022 (MoCRA) by adding this bill to a December budget package.
“On average, consumers in the U.S. use six to 12 cosmetics products daily. But, until recently the FDA didn’t have the authority to require manufacturers to submit cosmetic product listings, including a list of ingredients used in these products, or register the facilities where they were produced,” Namandjé Bumpus, PhD, FDA’s chief scientist, said in a press release.
In the statement, the FDA announced the release of a draft guidance document that is intended to help companies comply with the transparency requirements slated to kick in this December. The agency is accepting comments on this draft guidance through Sept. 7.
“Later this year, registration and listing of cosmetic product facilities and products will become a requirement, making information about cosmetic products, including the ingredients used in products and the facilities where they are produced, readily available to the agency,” Dr. Bumpus said.
The products, according to the FDA statement, include makeup, nail polishes, shaving creams, other grooming products, perfumes, face and body cleansers, hair products, moisturizers, and other skin care items.
MoCRA “represents a sea change in how FDA regulates the cosmetics industry,” attorneys Frederick R. Ball, Alyson Walker Lotman, and Kelly A. Bonner, wrote in an article for the Food and Drug Law Institute published in spring 2023.
The FDA has called the MoCRA law “the most significant expansion” of its authority to regulate cosmetics since the Federal Food, Drug, and Cosmetic Act was passed in 1938.
The agency is in the process of expanding its staff to carry out newly authorized duties, including the tracking of adverse events. The FDA budget request for fiscal 2024, which begins Oct. 1, seeks $5 million for work needed to implement MoCRA.
PFAS, or ‘forever chemicals’
Some of the requested FDA funding is intended to prepare the agency to assess the use of per-and polyfluoroalkyl substances (PFAS) in cosmetics.
MoCRA sets a 3-year deadline for the FDA to issue an assessment of the use and potential risks of PFAS in cosmetics products. PFAS are sometimes added as ingredients in some cosmetic products, including lotions, cleansers, nail polish, shaving cream, foundation, lipstick, eyeliner, eyeshadow, and mascara, according to the FDA. Sometimes the presence of PFAS in cosmetics is unintentional and is the result of impurities in raw materials or is due to the breakdown of ingredients, the FDA said.
The FDA’s website says that so far, the available research doesn’t allow for “definitive conclusions about the potential health risks of PFAS in cosmetics.”
The Centers for Disease Control and Prevention has stated that research has suggested potential links between high levels of certain PFAS, in general, with increased cholesterol levels, changes in liver enzyme levels, increased risk of hypertension or preeclampsia in pregnant women, and increased risk of kidney or testicular cancer.
PFAS compounds often are used to resist grease, oil, water, and heat in industrial settings. They are used in thousands of products, from nonstick cookware to firefighting foams and protective gear, because they can reduce friction, according to a National Academies of Sciences, Engineering, and Medicine report on PFAS that was issued last year.
PFAS are known as “forever chemicals” because they contain a carbon-fluorine bond, which does not break naturally. Even when PFAS are transformed in the body, they can assume other forms of PFAS that preserve the troublesome carbon-fluorine bond. With PFAS, the human body is confronted with a substance it doesn’t have the tools to process.
This is in contrast to proteins and carbohydrates, which are in a sense prepackaged for relatively easy disassembly in the human body. Many of these compounds have weak links that enzymes and stomach acid can take apart, such as sulfur-to-sulfur (disulfide) bonds. That’s why protein-based biotech drugs are injected instead of administered as pills. The ultimate goal of this digestion is for the body to gain energy from these compounds.
But with PFAS, the body faces the challenge of carbon-fluorine bonds that are very hard to break down, and there is no payoff for these efforts, Graham F. Peaslee, PhD, professor of physics at the University of Notre Dame (Indiana), told this news organization.
“Nothing will naturally eat it because when you break the bond, it’s like eating celery,” he said. “You use more calories to eat the celery than you gain back from it.”
Interest from a U.S. senator
Dr. Peaslee was one of the authors of a 2021 article about PFAS in cosmetics that appeared in the journal Environmental Science and Technology Letters.
In the article, Dr. Peaslee and colleagues reported on their screening of 231 cosmetic products purchased in the United States and Canada using particle-induced gamma-ray emission spectroscopy. They found cases of undisclosed PFAS in cosmetic products. Foundations, mascaras, and lip products were noted as being especially problematic.
Sen. Susan Collins (R-ME) cited Dr. Peaslee’s article in a 2021 floor speech as she argued for having the FDA ban the intentional addition of PFAS to cosmetics.
“The findings of this study are particularly alarming, as many of these products are subject to direct human exposure,” Sen. Collins said. “For example, lipstick is often inadvertently ingested, and mascara is sometimes absorbed through tear ducts.”
In addition, workers at cosmetics plants may be exposed to PFAS and discarded cosmetics that have these compounds, which could potentially contaminate drinking water, Sen. Collins said. In 2021, she introduced legislation seeking a ban on PFAS that are intentionally added to cosmetics. That legislation did not advance through the Senate.
But the Senate Appropriations Committee, on which Sen. Collins is the ranking Republican, wants the FDA to keep a ban on PFAS in mind.
The Senate Agriculture Appropriations subcommittee, which oversees the FDA’s budget, raised the issue of PFAS and cosmetics in a June report. The FDA should develop a plan outlining research needed to inform “regulatory decision making, including potential development of a proposed rule to ban intentionally added PFAS substances in cosmetics,” the subcommittee said.
A version of this article first appeared on Medscape.com.
They are also preparing to assess potential risks of so-called forever chemicals in these products.
The Food and Drug Administration last year gained new authority over cosmetics when Congress passed the Modernization of Cosmetics Regulation Act of 2022 (MoCRA) by adding this bill to a December budget package.
“On average, consumers in the U.S. use six to 12 cosmetics products daily. But, until recently the FDA didn’t have the authority to require manufacturers to submit cosmetic product listings, including a list of ingredients used in these products, or register the facilities where they were produced,” Namandjé Bumpus, PhD, FDA’s chief scientist, said in a press release.
In the statement, the FDA announced the release of a draft guidance document that is intended to help companies comply with the transparency requirements slated to kick in this December. The agency is accepting comments on this draft guidance through Sept. 7.
“Later this year, registration and listing of cosmetic product facilities and products will become a requirement, making information about cosmetic products, including the ingredients used in products and the facilities where they are produced, readily available to the agency,” Dr. Bumpus said.
The products, according to the FDA statement, include makeup, nail polishes, shaving creams, other grooming products, perfumes, face and body cleansers, hair products, moisturizers, and other skin care items.
MoCRA “represents a sea change in how FDA regulates the cosmetics industry,” attorneys Frederick R. Ball, Alyson Walker Lotman, and Kelly A. Bonner, wrote in an article for the Food and Drug Law Institute published in spring 2023.
The FDA has called the MoCRA law “the most significant expansion” of its authority to regulate cosmetics since the Federal Food, Drug, and Cosmetic Act was passed in 1938.
The agency is in the process of expanding its staff to carry out newly authorized duties, including the tracking of adverse events. The FDA budget request for fiscal 2024, which begins Oct. 1, seeks $5 million for work needed to implement MoCRA.
PFAS, or ‘forever chemicals’
Some of the requested FDA funding is intended to prepare the agency to assess the use of per-and polyfluoroalkyl substances (PFAS) in cosmetics.
MoCRA sets a 3-year deadline for the FDA to issue an assessment of the use and potential risks of PFAS in cosmetics products. PFAS are sometimes added as ingredients in some cosmetic products, including lotions, cleansers, nail polish, shaving cream, foundation, lipstick, eyeliner, eyeshadow, and mascara, according to the FDA. Sometimes the presence of PFAS in cosmetics is unintentional and is the result of impurities in raw materials or is due to the breakdown of ingredients, the FDA said.
The FDA’s website says that so far, the available research doesn’t allow for “definitive conclusions about the potential health risks of PFAS in cosmetics.”
The Centers for Disease Control and Prevention has stated that research has suggested potential links between high levels of certain PFAS, in general, with increased cholesterol levels, changes in liver enzyme levels, increased risk of hypertension or preeclampsia in pregnant women, and increased risk of kidney or testicular cancer.
PFAS compounds often are used to resist grease, oil, water, and heat in industrial settings. They are used in thousands of products, from nonstick cookware to firefighting foams and protective gear, because they can reduce friction, according to a National Academies of Sciences, Engineering, and Medicine report on PFAS that was issued last year.
PFAS are known as “forever chemicals” because they contain a carbon-fluorine bond, which does not break naturally. Even when PFAS are transformed in the body, they can assume other forms of PFAS that preserve the troublesome carbon-fluorine bond. With PFAS, the human body is confronted with a substance it doesn’t have the tools to process.
This is in contrast to proteins and carbohydrates, which are in a sense prepackaged for relatively easy disassembly in the human body. Many of these compounds have weak links that enzymes and stomach acid can take apart, such as sulfur-to-sulfur (disulfide) bonds. That’s why protein-based biotech drugs are injected instead of administered as pills. The ultimate goal of this digestion is for the body to gain energy from these compounds.
But with PFAS, the body faces the challenge of carbon-fluorine bonds that are very hard to break down, and there is no payoff for these efforts, Graham F. Peaslee, PhD, professor of physics at the University of Notre Dame (Indiana), told this news organization.
“Nothing will naturally eat it because when you break the bond, it’s like eating celery,” he said. “You use more calories to eat the celery than you gain back from it.”
Interest from a U.S. senator
Dr. Peaslee was one of the authors of a 2021 article about PFAS in cosmetics that appeared in the journal Environmental Science and Technology Letters.
In the article, Dr. Peaslee and colleagues reported on their screening of 231 cosmetic products purchased in the United States and Canada using particle-induced gamma-ray emission spectroscopy. They found cases of undisclosed PFAS in cosmetic products. Foundations, mascaras, and lip products were noted as being especially problematic.
Sen. Susan Collins (R-ME) cited Dr. Peaslee’s article in a 2021 floor speech as she argued for having the FDA ban the intentional addition of PFAS to cosmetics.
“The findings of this study are particularly alarming, as many of these products are subject to direct human exposure,” Sen. Collins said. “For example, lipstick is often inadvertently ingested, and mascara is sometimes absorbed through tear ducts.”
In addition, workers at cosmetics plants may be exposed to PFAS and discarded cosmetics that have these compounds, which could potentially contaminate drinking water, Sen. Collins said. In 2021, she introduced legislation seeking a ban on PFAS that are intentionally added to cosmetics. That legislation did not advance through the Senate.
But the Senate Appropriations Committee, on which Sen. Collins is the ranking Republican, wants the FDA to keep a ban on PFAS in mind.
The Senate Agriculture Appropriations subcommittee, which oversees the FDA’s budget, raised the issue of PFAS and cosmetics in a June report. The FDA should develop a plan outlining research needed to inform “regulatory decision making, including potential development of a proposed rule to ban intentionally added PFAS substances in cosmetics,” the subcommittee said.
A version of this article first appeared on Medscape.com.
Probiotics improve nonmotor symptoms of Parkinson’s
COPENHAGEN – results of a new randomized trial show.
Participants taking the probiotic also saw a reduced delay in “time to on” of treatment with levodopa, thus reducing the delay until effectiveness of the treatment, said study presenter Valentina Leta, MD, PhD, department of neurosciences, King’s College London Institute of Psychiatry, Psychology and Neuroscience.
Dr. Leta presented the findings at the International Congress of Parkinson’s Disease and Movement Disorders.
“Virtually every person with Parkinson’s might have some degree of gastrointestinal dysfunction, and virtually the entire tract might be affected, from the mouth to the rectum,” Dr. Leta told attendees of the congress.
A number of different mechanisms have been associated with this gastrointestinal dysfunction, she noted, including proinflammatory changes in the gut microbiota, so a modulatory intervention “could be a therapeutic strategy for Parkinson’s disease.”
However, “despite numerous preclinical studies showing potential beneficial effects on a variety of pathological mechanisms involved in Parkinson’s disease, the clinical evidence is limited ... to the treatment of constipation,” she explained.
The team therefore conducted a multicenter, randomized, double-blind, placebo-controlled trial, in which patients with both Parkinson’s disease and constipation, based on the Rome IV criteria, were randomly assigned to receive a probiotic or placebo for 3 months.
The probiotic used was a liquid formulation (Symprove) and contained four strains: Lacticaseibacillus rhamnosus, Enterococcus faecium, Lactobacillus acidophilus, and Lactiplantibacillus plantarum.
A total of 74 patients were randomly assigned to the two study arms. The two groups were well matched for sociodemographics, Parkinson’s disease, and constipation-related characteristics, Dr. Leta reported, and only 3 patients in each arm discontinued the study. The probiotic intervention had a “good tolerability and safety profile, with a similar number of adverse events between the two groups, and no serious adverse events.”
Increase in healthy bacteria
The study met its primary outcome of changes in gut microbiome at the end of the 12-week intervention, as measured on shallow shotgun sequencing.
The probiotic was associated with a “statistically significant increase of the abundance of bacteria which are known to have beneficial health related properties, such as Odoribacteraceae,” Dr. Leta said.
This bacterium is “known to be reduced in people with Parkinson’s disease,” she explained, “and is involved in the production of short-chain fatty acids, which are known to have beneficial health-related properties.”
The secondary endpoint of the study included changes in motor and nonmotor symptoms, and the probiotic was associated with a significant improvement in the “time to on” with levodopa treatment, shortening this period from an average of 31.43 minutes at baseline to 23.95 minutes at the postintervention assessment (P < .027).
There was also a significant improvement in the Non-Motor Symptoms Scale (NMSS) score between baseline and the postintervention assessment in patients given the probiotic, from 70.71 to 61.34 (P = .005).
This, Dr. Leta observed, was “driven by improvements in the sleep, fatigue, and gastrointestinal domains.”
No such significant improvements were observed in the placebo arm.
Probiotics ‘hot topic’ among patients
Claudia Trenkwalder, MD, full professor of neurology at University Medical Center Goettingen (Germany), said in an interview that the use of probiotics is a “hot topic in Parkinson’s disease research, especially among patients.”
Dr. Trenkwalder, who was not involved in the study, noted that Lactobacillus strains “are established in Parkinson’s disease constipation treatment, with randomized controlled trials showing a significant improvement in constipation.
“Therefore, this is a useful treatment. The question here is: Do we have additional effects that can be measured in the microbiome and in clinical symptomatology?”
The trial showed that the probiotic studied “did alter the microbiome and did improve the constipation,” said Dr. Trenkwalder; however, the current data cannot prove whether the probiotic influenced the symptoms of Parkinson’s disease because the improvement in NMSS scores “is driven by the improvement in constipation.”
This, she argued, could have resulted in better absorption of levodopa.
A dietitian in the audience agreed. She asked whether the probiotic was doing anything “besides improving constipation,” adding that the resulting increased ability to absorb levodopa is also “going to help your sleep.”
Beyond constipation?
Dr. Leta replied that “we can assume that there is a link between the reduction in the ‘time to on’ and the improvement in constipation. We are doing some analyses in terms of levodopa pharmacokinetics to really understand the mechanisms behind this result.”
Although the improvement in constipation is “one of the possible hypotheses for the improvement in ‘time to on,’” she continued, “there is a more speculative one” in which the probiotics are modulating inflammatory parameters that could contribute to the improvement in sleep.
Veronica Bruno, MD, MPH, assistant professor in the department of clinical neurosciences at the University of Calgary (Alta.), commented in a press release that there has been “increasing interest” in examining the relationship between gut dysbiosis and the “gut-brain axis” in Parkinson’s disease.
The current study “stands out as a significant contribution to this area of study,” she said.
“While the implications of the observed changes in gut microbiota remain a captivating realm for further investigation, a particularly noteworthy finding revolves around the reduction in the ‘time to on’ observed within the active treatment group.”
Dr. Bruno said that shortening of the time to on “holds promise for substantial enhancements in patients’ lives” by reducing “difficult ‘off’ intervals and enhancing overall well-being.”
The study was funded by the UK National Institute for Health Research Mental Health Biomedical Research Centre and Dementia Unit at South London and Maudsley NHS Foundation Trust, and King’s College London. No relevant financial relationships were declared.
A version of this article first appeared on Medscape.com.
COPENHAGEN – results of a new randomized trial show.
Participants taking the probiotic also saw a reduced delay in “time to on” of treatment with levodopa, thus reducing the delay until effectiveness of the treatment, said study presenter Valentina Leta, MD, PhD, department of neurosciences, King’s College London Institute of Psychiatry, Psychology and Neuroscience.
Dr. Leta presented the findings at the International Congress of Parkinson’s Disease and Movement Disorders.
“Virtually every person with Parkinson’s might have some degree of gastrointestinal dysfunction, and virtually the entire tract might be affected, from the mouth to the rectum,” Dr. Leta told attendees of the congress.
A number of different mechanisms have been associated with this gastrointestinal dysfunction, she noted, including proinflammatory changes in the gut microbiota, so a modulatory intervention “could be a therapeutic strategy for Parkinson’s disease.”
However, “despite numerous preclinical studies showing potential beneficial effects on a variety of pathological mechanisms involved in Parkinson’s disease, the clinical evidence is limited ... to the treatment of constipation,” she explained.
The team therefore conducted a multicenter, randomized, double-blind, placebo-controlled trial, in which patients with both Parkinson’s disease and constipation, based on the Rome IV criteria, were randomly assigned to receive a probiotic or placebo for 3 months.
The probiotic used was a liquid formulation (Symprove) and contained four strains: Lacticaseibacillus rhamnosus, Enterococcus faecium, Lactobacillus acidophilus, and Lactiplantibacillus plantarum.
A total of 74 patients were randomly assigned to the two study arms. The two groups were well matched for sociodemographics, Parkinson’s disease, and constipation-related characteristics, Dr. Leta reported, and only 3 patients in each arm discontinued the study. The probiotic intervention had a “good tolerability and safety profile, with a similar number of adverse events between the two groups, and no serious adverse events.”
Increase in healthy bacteria
The study met its primary outcome of changes in gut microbiome at the end of the 12-week intervention, as measured on shallow shotgun sequencing.
The probiotic was associated with a “statistically significant increase of the abundance of bacteria which are known to have beneficial health related properties, such as Odoribacteraceae,” Dr. Leta said.
This bacterium is “known to be reduced in people with Parkinson’s disease,” she explained, “and is involved in the production of short-chain fatty acids, which are known to have beneficial health-related properties.”
The secondary endpoint of the study included changes in motor and nonmotor symptoms, and the probiotic was associated with a significant improvement in the “time to on” with levodopa treatment, shortening this period from an average of 31.43 minutes at baseline to 23.95 minutes at the postintervention assessment (P < .027).
There was also a significant improvement in the Non-Motor Symptoms Scale (NMSS) score between baseline and the postintervention assessment in patients given the probiotic, from 70.71 to 61.34 (P = .005).
This, Dr. Leta observed, was “driven by improvements in the sleep, fatigue, and gastrointestinal domains.”
No such significant improvements were observed in the placebo arm.
Probiotics ‘hot topic’ among patients
Claudia Trenkwalder, MD, full professor of neurology at University Medical Center Goettingen (Germany), said in an interview that the use of probiotics is a “hot topic in Parkinson’s disease research, especially among patients.”
Dr. Trenkwalder, who was not involved in the study, noted that Lactobacillus strains “are established in Parkinson’s disease constipation treatment, with randomized controlled trials showing a significant improvement in constipation.
“Therefore, this is a useful treatment. The question here is: Do we have additional effects that can be measured in the microbiome and in clinical symptomatology?”
The trial showed that the probiotic studied “did alter the microbiome and did improve the constipation,” said Dr. Trenkwalder; however, the current data cannot prove whether the probiotic influenced the symptoms of Parkinson’s disease because the improvement in NMSS scores “is driven by the improvement in constipation.”
This, she argued, could have resulted in better absorption of levodopa.
A dietitian in the audience agreed. She asked whether the probiotic was doing anything “besides improving constipation,” adding that the resulting increased ability to absorb levodopa is also “going to help your sleep.”
Beyond constipation?
Dr. Leta replied that “we can assume that there is a link between the reduction in the ‘time to on’ and the improvement in constipation. We are doing some analyses in terms of levodopa pharmacokinetics to really understand the mechanisms behind this result.”
Although the improvement in constipation is “one of the possible hypotheses for the improvement in ‘time to on,’” she continued, “there is a more speculative one” in which the probiotics are modulating inflammatory parameters that could contribute to the improvement in sleep.
Veronica Bruno, MD, MPH, assistant professor in the department of clinical neurosciences at the University of Calgary (Alta.), commented in a press release that there has been “increasing interest” in examining the relationship between gut dysbiosis and the “gut-brain axis” in Parkinson’s disease.
The current study “stands out as a significant contribution to this area of study,” she said.
“While the implications of the observed changes in gut microbiota remain a captivating realm for further investigation, a particularly noteworthy finding revolves around the reduction in the ‘time to on’ observed within the active treatment group.”
Dr. Bruno said that shortening of the time to on “holds promise for substantial enhancements in patients’ lives” by reducing “difficult ‘off’ intervals and enhancing overall well-being.”
The study was funded by the UK National Institute for Health Research Mental Health Biomedical Research Centre and Dementia Unit at South London and Maudsley NHS Foundation Trust, and King’s College London. No relevant financial relationships were declared.
A version of this article first appeared on Medscape.com.
COPENHAGEN – results of a new randomized trial show.
Participants taking the probiotic also saw a reduced delay in “time to on” of treatment with levodopa, thus reducing the delay until effectiveness of the treatment, said study presenter Valentina Leta, MD, PhD, department of neurosciences, King’s College London Institute of Psychiatry, Psychology and Neuroscience.
Dr. Leta presented the findings at the International Congress of Parkinson’s Disease and Movement Disorders.
“Virtually every person with Parkinson’s might have some degree of gastrointestinal dysfunction, and virtually the entire tract might be affected, from the mouth to the rectum,” Dr. Leta told attendees of the congress.
A number of different mechanisms have been associated with this gastrointestinal dysfunction, she noted, including proinflammatory changes in the gut microbiota, so a modulatory intervention “could be a therapeutic strategy for Parkinson’s disease.”
However, “despite numerous preclinical studies showing potential beneficial effects on a variety of pathological mechanisms involved in Parkinson’s disease, the clinical evidence is limited ... to the treatment of constipation,” she explained.
The team therefore conducted a multicenter, randomized, double-blind, placebo-controlled trial, in which patients with both Parkinson’s disease and constipation, based on the Rome IV criteria, were randomly assigned to receive a probiotic or placebo for 3 months.
The probiotic used was a liquid formulation (Symprove) and contained four strains: Lacticaseibacillus rhamnosus, Enterococcus faecium, Lactobacillus acidophilus, and Lactiplantibacillus plantarum.
A total of 74 patients were randomly assigned to the two study arms. The two groups were well matched for sociodemographics, Parkinson’s disease, and constipation-related characteristics, Dr. Leta reported, and only 3 patients in each arm discontinued the study. The probiotic intervention had a “good tolerability and safety profile, with a similar number of adverse events between the two groups, and no serious adverse events.”
Increase in healthy bacteria
The study met its primary outcome of changes in gut microbiome at the end of the 12-week intervention, as measured on shallow shotgun sequencing.
The probiotic was associated with a “statistically significant increase of the abundance of bacteria which are known to have beneficial health related properties, such as Odoribacteraceae,” Dr. Leta said.
This bacterium is “known to be reduced in people with Parkinson’s disease,” she explained, “and is involved in the production of short-chain fatty acids, which are known to have beneficial health-related properties.”
The secondary endpoint of the study included changes in motor and nonmotor symptoms, and the probiotic was associated with a significant improvement in the “time to on” with levodopa treatment, shortening this period from an average of 31.43 minutes at baseline to 23.95 minutes at the postintervention assessment (P < .027).
There was also a significant improvement in the Non-Motor Symptoms Scale (NMSS) score between baseline and the postintervention assessment in patients given the probiotic, from 70.71 to 61.34 (P = .005).
This, Dr. Leta observed, was “driven by improvements in the sleep, fatigue, and gastrointestinal domains.”
No such significant improvements were observed in the placebo arm.
Probiotics ‘hot topic’ among patients
Claudia Trenkwalder, MD, full professor of neurology at University Medical Center Goettingen (Germany), said in an interview that the use of probiotics is a “hot topic in Parkinson’s disease research, especially among patients.”
Dr. Trenkwalder, who was not involved in the study, noted that Lactobacillus strains “are established in Parkinson’s disease constipation treatment, with randomized controlled trials showing a significant improvement in constipation.
“Therefore, this is a useful treatment. The question here is: Do we have additional effects that can be measured in the microbiome and in clinical symptomatology?”
The trial showed that the probiotic studied “did alter the microbiome and did improve the constipation,” said Dr. Trenkwalder; however, the current data cannot prove whether the probiotic influenced the symptoms of Parkinson’s disease because the improvement in NMSS scores “is driven by the improvement in constipation.”
This, she argued, could have resulted in better absorption of levodopa.
A dietitian in the audience agreed. She asked whether the probiotic was doing anything “besides improving constipation,” adding that the resulting increased ability to absorb levodopa is also “going to help your sleep.”
Beyond constipation?
Dr. Leta replied that “we can assume that there is a link between the reduction in the ‘time to on’ and the improvement in constipation. We are doing some analyses in terms of levodopa pharmacokinetics to really understand the mechanisms behind this result.”
Although the improvement in constipation is “one of the possible hypotheses for the improvement in ‘time to on,’” she continued, “there is a more speculative one” in which the probiotics are modulating inflammatory parameters that could contribute to the improvement in sleep.
Veronica Bruno, MD, MPH, assistant professor in the department of clinical neurosciences at the University of Calgary (Alta.), commented in a press release that there has been “increasing interest” in examining the relationship between gut dysbiosis and the “gut-brain axis” in Parkinson’s disease.
The current study “stands out as a significant contribution to this area of study,” she said.
“While the implications of the observed changes in gut microbiota remain a captivating realm for further investigation, a particularly noteworthy finding revolves around the reduction in the ‘time to on’ observed within the active treatment group.”
Dr. Bruno said that shortening of the time to on “holds promise for substantial enhancements in patients’ lives” by reducing “difficult ‘off’ intervals and enhancing overall well-being.”
The study was funded by the UK National Institute for Health Research Mental Health Biomedical Research Centre and Dementia Unit at South London and Maudsley NHS Foundation Trust, and King’s College London. No relevant financial relationships were declared.
A version of this article first appeared on Medscape.com.
AT MDS 2023
CTE common among young athletes in largest brain donor study
Analysis of brain tissue from athletes who were exposed to RHIs and died before the age of 30 revealed neuropathological evidence of shrinkage of the brain and microscopic changes that indicate a breach of the blood-brain barrier. The case series also identified the first known American female athlete with CTE.
Nearly all of those with CTE had a mild form of the disease and 71% played only at the amateur level in youth, high school, or college sports.
“A lot of people think CTE is a result of high-level, professional play such as football, ice hockey, and boxing, but it can affect amateur athletes and can affect people at a young age,” lead author Ann McKee, MD, professor of neurology and pathology and director of the Chronic Traumatic Encephalopathy Center at Boston University, said in an interview.
The findings were published online in JAMA Neurology.
A rare look
Brain donation at younger ages is rare, so most of what is known about CTE comes from studies in older athletes.
“We’ve always known that young people could develop this disease early after just amateur high school, youth, and college exposure, but this is the largest study of donor brains at this age,” Dr. McKee said.
The case series included 152 brains of athletes who played contact sports, experienced RHIs, and died before age 30. The tissues are part of the Understanding Neurologic Injury and Traumatic Encephalopathy (UNITE) Brain Bank and were donated between February 2008 and September 2022.
Researchers reviewed the donors’ medical records and conducted retrospective interviews with the donors’ next of kin to assess cognitive symptoms, mood disturbances, and neurobehavioral issues.
Donors died between the ages of 13 and 29 years, 92.8% were male and 73% were White. In 57.2% of the cases, suicide was the cause of death, with no difference between those with or without CTE.
CTE was neuropathologically diagnosed in 41.4% of athletes, using diagnostic criteria developed by the National Institute of Neurological Disorders and Stroke.
More than 95% had mild CTE. Diagnosis was associated with older age (mean difference, 3.92 years; P < .001) and significantly more years of exposure to contact sports (11.6 vs. 8.8 years).
Among those with CTE, 71.4% played amateur sports, including football (60.9%), soccer (17.2%), hockey (7.8%), and wrestling (7%).
The cohort includes the first known American female athlete with CTE. Recruiting female brain donors has always been a challenge, Dr. McKee said. In this study, females comprised about 7% of the entire cohort and tended to be younger and play fewer years of a sport, compared with their male counterparts. All of that could lower their risk for CTE, Dr. McKee said.
“We don’t have enough brain donations to make any comments about differences between the genders, but we’ve always known that women can develop CTE,” she said. “It’s been reported after domestic violence and in an autistic woman who was a headbanger, so it was just a matter of time before we found our first case.”
Early stage of CTE?
Neuropathological analysis revealed neuronal p-tau aggregates in all CTE cases, a hallmark of the disease.
Young athletes with CTE had significantly more ventricular dilatation, suggesting atrophy or shrinkage of the brain, and more cavum septum pellucidum.
“I was surprised that even at this very young age group we could see structural changes to the gross pathology,” Dr. McKee said.
Investigators also found evidence of perivascular macrophages in the deep white matter, a microscopic change that correlated with CTE and years of play and indicates a breach of the blood-brain barrier that could allow pro-inflammatory molecules to enter the brain, setting up a neuroinflammatory response.
“Neuroinflammation is a very early change after repetitive head impacts, as well as in CTE,” Dr. McKee said. “This may be one of the mechanisms by which the inflammation starts, meaning microvascular injury might be an integral part of the pathogenesis of CTE.”
A message for clinicians
All athletes had symptoms of mood and neurobehavioral dysfunction common in people with RHIs. There were no significant differences in those clinical symptoms based on CTE diagnosis, which is likely related to the retrospective nature of the clinical evaluations, Dr. McKee said.
While the study leaves many questions about CTE in younger athletes unanswered, there is a message for clinicians and for patients in the findings, she said.
For clinicians, it’s important to note that “this young population of amateur athletes can be very symptomatic, and in all likelihood, a lot of these symptoms are reversible with proper care and management,” Dr. McKee said.
“For individual athletes, it’s important to note that 58% of this cohort did not have CTE, so just because you have these symptoms is not an indication that you have a neurodegenerative disease,” she added.
The study was funded by Andlinger Foundation, the National Football League, Mac Parkman Foundation, National Operating Committee on Standards for Athletic Equipment, and the Nick and Lynn Buoniconti Foundation, World Wrestling Entertainment, Alzheimer’s Association, National Institutes of Health, Concussion Legacy Foundation, U.S. Department of Defense and the U.S. Department of Veterans Affairs. Dr. McKee is a member of the Mackey-White Health and Safety Committee of the National Football League Players Association and reported receiving grants from the NIH and Department of Veteran Affairs and other funding from the Buoniconti Foundation and Mac Parkman Foundation during the conduct of the study.
A version of this article appeared on Medscape.com.
Analysis of brain tissue from athletes who were exposed to RHIs and died before the age of 30 revealed neuropathological evidence of shrinkage of the brain and microscopic changes that indicate a breach of the blood-brain barrier. The case series also identified the first known American female athlete with CTE.
Nearly all of those with CTE had a mild form of the disease and 71% played only at the amateur level in youth, high school, or college sports.
“A lot of people think CTE is a result of high-level, professional play such as football, ice hockey, and boxing, but it can affect amateur athletes and can affect people at a young age,” lead author Ann McKee, MD, professor of neurology and pathology and director of the Chronic Traumatic Encephalopathy Center at Boston University, said in an interview.
The findings were published online in JAMA Neurology.
A rare look
Brain donation at younger ages is rare, so most of what is known about CTE comes from studies in older athletes.
“We’ve always known that young people could develop this disease early after just amateur high school, youth, and college exposure, but this is the largest study of donor brains at this age,” Dr. McKee said.
The case series included 152 brains of athletes who played contact sports, experienced RHIs, and died before age 30. The tissues are part of the Understanding Neurologic Injury and Traumatic Encephalopathy (UNITE) Brain Bank and were donated between February 2008 and September 2022.
Researchers reviewed the donors’ medical records and conducted retrospective interviews with the donors’ next of kin to assess cognitive symptoms, mood disturbances, and neurobehavioral issues.
Donors died between the ages of 13 and 29 years, 92.8% were male and 73% were White. In 57.2% of the cases, suicide was the cause of death, with no difference between those with or without CTE.
CTE was neuropathologically diagnosed in 41.4% of athletes, using diagnostic criteria developed by the National Institute of Neurological Disorders and Stroke.
More than 95% had mild CTE. Diagnosis was associated with older age (mean difference, 3.92 years; P < .001) and significantly more years of exposure to contact sports (11.6 vs. 8.8 years).
Among those with CTE, 71.4% played amateur sports, including football (60.9%), soccer (17.2%), hockey (7.8%), and wrestling (7%).
The cohort includes the first known American female athlete with CTE. Recruiting female brain donors has always been a challenge, Dr. McKee said. In this study, females comprised about 7% of the entire cohort and tended to be younger and play fewer years of a sport, compared with their male counterparts. All of that could lower their risk for CTE, Dr. McKee said.
“We don’t have enough brain donations to make any comments about differences between the genders, but we’ve always known that women can develop CTE,” she said. “It’s been reported after domestic violence and in an autistic woman who was a headbanger, so it was just a matter of time before we found our first case.”
Early stage of CTE?
Neuropathological analysis revealed neuronal p-tau aggregates in all CTE cases, a hallmark of the disease.
Young athletes with CTE had significantly more ventricular dilatation, suggesting atrophy or shrinkage of the brain, and more cavum septum pellucidum.
“I was surprised that even at this very young age group we could see structural changes to the gross pathology,” Dr. McKee said.
Investigators also found evidence of perivascular macrophages in the deep white matter, a microscopic change that correlated with CTE and years of play and indicates a breach of the blood-brain barrier that could allow pro-inflammatory molecules to enter the brain, setting up a neuroinflammatory response.
“Neuroinflammation is a very early change after repetitive head impacts, as well as in CTE,” Dr. McKee said. “This may be one of the mechanisms by which the inflammation starts, meaning microvascular injury might be an integral part of the pathogenesis of CTE.”
A message for clinicians
All athletes had symptoms of mood and neurobehavioral dysfunction common in people with RHIs. There were no significant differences in those clinical symptoms based on CTE diagnosis, which is likely related to the retrospective nature of the clinical evaluations, Dr. McKee said.
While the study leaves many questions about CTE in younger athletes unanswered, there is a message for clinicians and for patients in the findings, she said.
For clinicians, it’s important to note that “this young population of amateur athletes can be very symptomatic, and in all likelihood, a lot of these symptoms are reversible with proper care and management,” Dr. McKee said.
“For individual athletes, it’s important to note that 58% of this cohort did not have CTE, so just because you have these symptoms is not an indication that you have a neurodegenerative disease,” she added.
The study was funded by Andlinger Foundation, the National Football League, Mac Parkman Foundation, National Operating Committee on Standards for Athletic Equipment, and the Nick and Lynn Buoniconti Foundation, World Wrestling Entertainment, Alzheimer’s Association, National Institutes of Health, Concussion Legacy Foundation, U.S. Department of Defense and the U.S. Department of Veterans Affairs. Dr. McKee is a member of the Mackey-White Health and Safety Committee of the National Football League Players Association and reported receiving grants from the NIH and Department of Veteran Affairs and other funding from the Buoniconti Foundation and Mac Parkman Foundation during the conduct of the study.
A version of this article appeared on Medscape.com.
Analysis of brain tissue from athletes who were exposed to RHIs and died before the age of 30 revealed neuropathological evidence of shrinkage of the brain and microscopic changes that indicate a breach of the blood-brain barrier. The case series also identified the first known American female athlete with CTE.
Nearly all of those with CTE had a mild form of the disease and 71% played only at the amateur level in youth, high school, or college sports.
“A lot of people think CTE is a result of high-level, professional play such as football, ice hockey, and boxing, but it can affect amateur athletes and can affect people at a young age,” lead author Ann McKee, MD, professor of neurology and pathology and director of the Chronic Traumatic Encephalopathy Center at Boston University, said in an interview.
The findings were published online in JAMA Neurology.
A rare look
Brain donation at younger ages is rare, so most of what is known about CTE comes from studies in older athletes.
“We’ve always known that young people could develop this disease early after just amateur high school, youth, and college exposure, but this is the largest study of donor brains at this age,” Dr. McKee said.
The case series included 152 brains of athletes who played contact sports, experienced RHIs, and died before age 30. The tissues are part of the Understanding Neurologic Injury and Traumatic Encephalopathy (UNITE) Brain Bank and were donated between February 2008 and September 2022.
Researchers reviewed the donors’ medical records and conducted retrospective interviews with the donors’ next of kin to assess cognitive symptoms, mood disturbances, and neurobehavioral issues.
Donors died between the ages of 13 and 29 years, 92.8% were male and 73% were White. In 57.2% of the cases, suicide was the cause of death, with no difference between those with or without CTE.
CTE was neuropathologically diagnosed in 41.4% of athletes, using diagnostic criteria developed by the National Institute of Neurological Disorders and Stroke.
More than 95% had mild CTE. Diagnosis was associated with older age (mean difference, 3.92 years; P < .001) and significantly more years of exposure to contact sports (11.6 vs. 8.8 years).
Among those with CTE, 71.4% played amateur sports, including football (60.9%), soccer (17.2%), hockey (7.8%), and wrestling (7%).
The cohort includes the first known American female athlete with CTE. Recruiting female brain donors has always been a challenge, Dr. McKee said. In this study, females comprised about 7% of the entire cohort and tended to be younger and play fewer years of a sport, compared with their male counterparts. All of that could lower their risk for CTE, Dr. McKee said.
“We don’t have enough brain donations to make any comments about differences between the genders, but we’ve always known that women can develop CTE,” she said. “It’s been reported after domestic violence and in an autistic woman who was a headbanger, so it was just a matter of time before we found our first case.”
Early stage of CTE?
Neuropathological analysis revealed neuronal p-tau aggregates in all CTE cases, a hallmark of the disease.
Young athletes with CTE had significantly more ventricular dilatation, suggesting atrophy or shrinkage of the brain, and more cavum septum pellucidum.
“I was surprised that even at this very young age group we could see structural changes to the gross pathology,” Dr. McKee said.
Investigators also found evidence of perivascular macrophages in the deep white matter, a microscopic change that correlated with CTE and years of play and indicates a breach of the blood-brain barrier that could allow pro-inflammatory molecules to enter the brain, setting up a neuroinflammatory response.
“Neuroinflammation is a very early change after repetitive head impacts, as well as in CTE,” Dr. McKee said. “This may be one of the mechanisms by which the inflammation starts, meaning microvascular injury might be an integral part of the pathogenesis of CTE.”
A message for clinicians
All athletes had symptoms of mood and neurobehavioral dysfunction common in people with RHIs. There were no significant differences in those clinical symptoms based on CTE diagnosis, which is likely related to the retrospective nature of the clinical evaluations, Dr. McKee said.
While the study leaves many questions about CTE in younger athletes unanswered, there is a message for clinicians and for patients in the findings, she said.
For clinicians, it’s important to note that “this young population of amateur athletes can be very symptomatic, and in all likelihood, a lot of these symptoms are reversible with proper care and management,” Dr. McKee said.
“For individual athletes, it’s important to note that 58% of this cohort did not have CTE, so just because you have these symptoms is not an indication that you have a neurodegenerative disease,” she added.
The study was funded by Andlinger Foundation, the National Football League, Mac Parkman Foundation, National Operating Committee on Standards for Athletic Equipment, and the Nick and Lynn Buoniconti Foundation, World Wrestling Entertainment, Alzheimer’s Association, National Institutes of Health, Concussion Legacy Foundation, U.S. Department of Defense and the U.S. Department of Veterans Affairs. Dr. McKee is a member of the Mackey-White Health and Safety Committee of the National Football League Players Association and reported receiving grants from the NIH and Department of Veteran Affairs and other funding from the Buoniconti Foundation and Mac Parkman Foundation during the conduct of the study.
A version of this article appeared on Medscape.com.
Could retinal changes be a harbinger of Parkinson’s?
Changes in retinal tissues known to be associated with Parkinson’s disease (PD) may occur up to 7 years before clinical symptoms of the disease appear, a new study suggests.
Researchers used artificial intelligence (AI) to analyze data from two population-level data sets and the world’s largest database of retinal images and associated clinical data to detect the retinal changes in patients with PD and in healthy individuals who developed the disease years later.
Prior research had shown that PD is associated with a thinning of the ganglion cell-inner plexiform layer (GCIPL) in the retina, something that investigators confirmed in this new study. But they also identified changes in the inner nuclear layer (INL), which is a new finding.
The study is the largest to date on retinal markers in PD and the first to show these changes in living patients.
“I think we are still several years away from converting these findings into individual level prediction for patients,” lead author, Siegfried Wagner, MD, MsC, Honorary Clinical Senior Research Fellow at Moorfields Eye Hospital and University College of London Institute of Ophthalmology in London, told this news organization. “The most important takeaway is that there are observable differences in the retina of individuals who go on to develop Parkinson’s disease.”
The findings were published online in Neurology.
Another look at OCT
Researchers used data from retinal eye scans taken by optical coherence tomography (OCT), a noninvasive three-dimensional imaging technology that is widely used by opticians.
Other studies have used OCT to detect retinal changes in multiple sclerosis and cognitive decline.
For this research, investigators identified markers in people with PD using ophthalmic imaging data from 700 patients and 105,770 controls who participated in the retrospective AlzEye study.
After adjustment for age, sex, ethnicity, hypertension, and diabetes, individuals with PD had significantly thinner GCIPL and reduced thickness of the INL.
To evaluate retinal changes in patients before a PD diagnosis, researchers then turned to 50,405 participants in the UK Biobank with no history of PD who received a retinal scan as part of their baseline visit. Of that group, 53 were diagnosed with PD during the study period.
Researchers found an association between new diagnoses of PD and reduced thickness of the GCIPL (hazard ratio [HR], 0.62; P = .002) and thinner INL, especially at the inferior subfield (HR, 0.66; P = .002). That association persisted even in people whose clinical symptoms developed within 2 years of the retinal scan.
“We wonder if the reduced INL thickness is indicating a direct dopaminergic impairment occurring within the inner retina,” Dr. Wagner said. “Dopaminergic amacrine cells only account for a small proportion of the cells in this layer but previous work in the laboratory shows observable abnormalities in Parkinson’s disease.”
Too early for diagnostics?
Commenting on the findings, Rebecca Gilbert, MD, PhD, chief scientific officer, American Parkinson Disease Association, noted that the changes in the retinal thickness identified in the study were too small to be useful in the clinic as a screening tool for early PD.
“In order for that to happen, the specificity and sensitivity needs to be established,” she said. “Both specificity and sensitivity need to be high enough so that the test can be used to give clinically meaningful results – and reliably tell an individual with PD that he or she does have the disease and individual without PD that he or she doesn’t have the disease.”
Authors of an accompanying editorial agreed. Valeria Koska, MD, and Philipp Albrecht, MD, both of Heinrich Heine University Düsseldorf in Germany, noted that though the effect sizes of retinal changes were small, the study “sets new standards for the role of retinal morphology as potential biomarker in neurodegenerative disease.”
The study was funded by Fight for Sight UK, Medical Research Council, UK Research & Innovation, Basque Health Department, and the Wellcome Trust Study. Dr. Wagner reported funding from the Medical Research Council and the Rank Prize. Dr. Gilbert is employed by the American Parkinson Disease Association. Dr. Albrecht has received grant and personal fees and nonfinancial support from Allergan, Biogen, Celgene, Ipsen, Janssen Cilag, Merck, Merz Pharmaceuticals, Novartis, Roche, and Teva, outside the submitted work. Dr. Koska reported no relevant disclosures.
A version of this article appeared on Medscape.com.
Changes in retinal tissues known to be associated with Parkinson’s disease (PD) may occur up to 7 years before clinical symptoms of the disease appear, a new study suggests.
Researchers used artificial intelligence (AI) to analyze data from two population-level data sets and the world’s largest database of retinal images and associated clinical data to detect the retinal changes in patients with PD and in healthy individuals who developed the disease years later.
Prior research had shown that PD is associated with a thinning of the ganglion cell-inner plexiform layer (GCIPL) in the retina, something that investigators confirmed in this new study. But they also identified changes in the inner nuclear layer (INL), which is a new finding.
The study is the largest to date on retinal markers in PD and the first to show these changes in living patients.
“I think we are still several years away from converting these findings into individual level prediction for patients,” lead author, Siegfried Wagner, MD, MsC, Honorary Clinical Senior Research Fellow at Moorfields Eye Hospital and University College of London Institute of Ophthalmology in London, told this news organization. “The most important takeaway is that there are observable differences in the retina of individuals who go on to develop Parkinson’s disease.”
The findings were published online in Neurology.
Another look at OCT
Researchers used data from retinal eye scans taken by optical coherence tomography (OCT), a noninvasive three-dimensional imaging technology that is widely used by opticians.
Other studies have used OCT to detect retinal changes in multiple sclerosis and cognitive decline.
For this research, investigators identified markers in people with PD using ophthalmic imaging data from 700 patients and 105,770 controls who participated in the retrospective AlzEye study.
After adjustment for age, sex, ethnicity, hypertension, and diabetes, individuals with PD had significantly thinner GCIPL and reduced thickness of the INL.
To evaluate retinal changes in patients before a PD diagnosis, researchers then turned to 50,405 participants in the UK Biobank with no history of PD who received a retinal scan as part of their baseline visit. Of that group, 53 were diagnosed with PD during the study period.
Researchers found an association between new diagnoses of PD and reduced thickness of the GCIPL (hazard ratio [HR], 0.62; P = .002) and thinner INL, especially at the inferior subfield (HR, 0.66; P = .002). That association persisted even in people whose clinical symptoms developed within 2 years of the retinal scan.
“We wonder if the reduced INL thickness is indicating a direct dopaminergic impairment occurring within the inner retina,” Dr. Wagner said. “Dopaminergic amacrine cells only account for a small proportion of the cells in this layer but previous work in the laboratory shows observable abnormalities in Parkinson’s disease.”
Too early for diagnostics?
Commenting on the findings, Rebecca Gilbert, MD, PhD, chief scientific officer, American Parkinson Disease Association, noted that the changes in the retinal thickness identified in the study were too small to be useful in the clinic as a screening tool for early PD.
“In order for that to happen, the specificity and sensitivity needs to be established,” she said. “Both specificity and sensitivity need to be high enough so that the test can be used to give clinically meaningful results – and reliably tell an individual with PD that he or she does have the disease and individual without PD that he or she doesn’t have the disease.”
Authors of an accompanying editorial agreed. Valeria Koska, MD, and Philipp Albrecht, MD, both of Heinrich Heine University Düsseldorf in Germany, noted that though the effect sizes of retinal changes were small, the study “sets new standards for the role of retinal morphology as potential biomarker in neurodegenerative disease.”
The study was funded by Fight for Sight UK, Medical Research Council, UK Research & Innovation, Basque Health Department, and the Wellcome Trust Study. Dr. Wagner reported funding from the Medical Research Council and the Rank Prize. Dr. Gilbert is employed by the American Parkinson Disease Association. Dr. Albrecht has received grant and personal fees and nonfinancial support from Allergan, Biogen, Celgene, Ipsen, Janssen Cilag, Merck, Merz Pharmaceuticals, Novartis, Roche, and Teva, outside the submitted work. Dr. Koska reported no relevant disclosures.
A version of this article appeared on Medscape.com.
Changes in retinal tissues known to be associated with Parkinson’s disease (PD) may occur up to 7 years before clinical symptoms of the disease appear, a new study suggests.
Researchers used artificial intelligence (AI) to analyze data from two population-level data sets and the world’s largest database of retinal images and associated clinical data to detect the retinal changes in patients with PD and in healthy individuals who developed the disease years later.
Prior research had shown that PD is associated with a thinning of the ganglion cell-inner plexiform layer (GCIPL) in the retina, something that investigators confirmed in this new study. But they also identified changes in the inner nuclear layer (INL), which is a new finding.
The study is the largest to date on retinal markers in PD and the first to show these changes in living patients.
“I think we are still several years away from converting these findings into individual level prediction for patients,” lead author, Siegfried Wagner, MD, MsC, Honorary Clinical Senior Research Fellow at Moorfields Eye Hospital and University College of London Institute of Ophthalmology in London, told this news organization. “The most important takeaway is that there are observable differences in the retina of individuals who go on to develop Parkinson’s disease.”
The findings were published online in Neurology.
Another look at OCT
Researchers used data from retinal eye scans taken by optical coherence tomography (OCT), a noninvasive three-dimensional imaging technology that is widely used by opticians.
Other studies have used OCT to detect retinal changes in multiple sclerosis and cognitive decline.
For this research, investigators identified markers in people with PD using ophthalmic imaging data from 700 patients and 105,770 controls who participated in the retrospective AlzEye study.
After adjustment for age, sex, ethnicity, hypertension, and diabetes, individuals with PD had significantly thinner GCIPL and reduced thickness of the INL.
To evaluate retinal changes in patients before a PD diagnosis, researchers then turned to 50,405 participants in the UK Biobank with no history of PD who received a retinal scan as part of their baseline visit. Of that group, 53 were diagnosed with PD during the study period.
Researchers found an association between new diagnoses of PD and reduced thickness of the GCIPL (hazard ratio [HR], 0.62; P = .002) and thinner INL, especially at the inferior subfield (HR, 0.66; P = .002). That association persisted even in people whose clinical symptoms developed within 2 years of the retinal scan.
“We wonder if the reduced INL thickness is indicating a direct dopaminergic impairment occurring within the inner retina,” Dr. Wagner said. “Dopaminergic amacrine cells only account for a small proportion of the cells in this layer but previous work in the laboratory shows observable abnormalities in Parkinson’s disease.”
Too early for diagnostics?
Commenting on the findings, Rebecca Gilbert, MD, PhD, chief scientific officer, American Parkinson Disease Association, noted that the changes in the retinal thickness identified in the study were too small to be useful in the clinic as a screening tool for early PD.
“In order for that to happen, the specificity and sensitivity needs to be established,” she said. “Both specificity and sensitivity need to be high enough so that the test can be used to give clinically meaningful results – and reliably tell an individual with PD that he or she does have the disease and individual without PD that he or she doesn’t have the disease.”
Authors of an accompanying editorial agreed. Valeria Koska, MD, and Philipp Albrecht, MD, both of Heinrich Heine University Düsseldorf in Germany, noted that though the effect sizes of retinal changes were small, the study “sets new standards for the role of retinal morphology as potential biomarker in neurodegenerative disease.”
The study was funded by Fight for Sight UK, Medical Research Council, UK Research & Innovation, Basque Health Department, and the Wellcome Trust Study. Dr. Wagner reported funding from the Medical Research Council and the Rank Prize. Dr. Gilbert is employed by the American Parkinson Disease Association. Dr. Albrecht has received grant and personal fees and nonfinancial support from Allergan, Biogen, Celgene, Ipsen, Janssen Cilag, Merck, Merz Pharmaceuticals, Novartis, Roche, and Teva, outside the submitted work. Dr. Koska reported no relevant disclosures.
A version of this article appeared on Medscape.com.
FDA okays first biosimilar for multiple sclerosis
including clinically isolated syndrome, relapsing remitting MS, and active secondary progressive disease.
“Biosimilar medications offer additional effective treatment options that have the potential to increase access for people living with relapsing forms of multiple sclerosis. [This] approval could have a meaningful impact for patients managing their disease,” Paul R. Lee, MD, PhD, director of the division of neurology II, FDA Center for Drug Evaluation and Research, said in a statement.
The natalizumab biosimilar is given using the same dosing and administration schedule. Like the reference product, it is indicated for adults with moderately to severely active Crohn’s disease unresponsive to other medications.
The approval of the natalizumab biosimilar is based on results of the phase 3 Antelope trial, which showed no clinically meaningful differences between it and the reference product.
The trial included 264 adults (mean age, 36 years; 61% women) with relapsing remitting MS from 48 centers in seven Eastern European countries.
All were randomly assigned to receive intravenous infusions every 4 weeks of 300 mg of the natalizumab biosimilar or the reference product for a total of 12 infusions.
At 24 and 48 weeks, there were no between-group differences in annualized relapse rates or Expanded Disability Status Scale scores, which were similar between treatment groups at baseline. There were also no significant differences in safety, tolerability, or immunogenicity.
The prescribing information for both natalizumab products includes a boxed warning about the increased risk of progressive multifocal leukoencephalopathy (PML), a viral infection of the brain that usually leads to death or severe disability.
Risk factors for the development of PML include the presence of antibodies to the JC virus, longer duration of therapy, and prior use of immunosuppressants.
“These factors should be considered in the context of expected benefit when initiating and continuing treatment with natalizumab products, and health care providers should monitor patients and withhold treatment immediately at the first sign or symptom suggestive of PML,” the FDA advises.
Because of the risks of PML, natalizumab products are available only through a restricted drug distribution program under a risk evaluation and mitigation strategy.
In a statement, Sandoz said it’s committed to having the product available in the United States “as soon as possible.”
A version of this article appeared on Medscape.com.
including clinically isolated syndrome, relapsing remitting MS, and active secondary progressive disease.
“Biosimilar medications offer additional effective treatment options that have the potential to increase access for people living with relapsing forms of multiple sclerosis. [This] approval could have a meaningful impact for patients managing their disease,” Paul R. Lee, MD, PhD, director of the division of neurology II, FDA Center for Drug Evaluation and Research, said in a statement.
The natalizumab biosimilar is given using the same dosing and administration schedule. Like the reference product, it is indicated for adults with moderately to severely active Crohn’s disease unresponsive to other medications.
The approval of the natalizumab biosimilar is based on results of the phase 3 Antelope trial, which showed no clinically meaningful differences between it and the reference product.
The trial included 264 adults (mean age, 36 years; 61% women) with relapsing remitting MS from 48 centers in seven Eastern European countries.
All were randomly assigned to receive intravenous infusions every 4 weeks of 300 mg of the natalizumab biosimilar or the reference product for a total of 12 infusions.
At 24 and 48 weeks, there were no between-group differences in annualized relapse rates or Expanded Disability Status Scale scores, which were similar between treatment groups at baseline. There were also no significant differences in safety, tolerability, or immunogenicity.
The prescribing information for both natalizumab products includes a boxed warning about the increased risk of progressive multifocal leukoencephalopathy (PML), a viral infection of the brain that usually leads to death or severe disability.
Risk factors for the development of PML include the presence of antibodies to the JC virus, longer duration of therapy, and prior use of immunosuppressants.
“These factors should be considered in the context of expected benefit when initiating and continuing treatment with natalizumab products, and health care providers should monitor patients and withhold treatment immediately at the first sign or symptom suggestive of PML,” the FDA advises.
Because of the risks of PML, natalizumab products are available only through a restricted drug distribution program under a risk evaluation and mitigation strategy.
In a statement, Sandoz said it’s committed to having the product available in the United States “as soon as possible.”
A version of this article appeared on Medscape.com.
including clinically isolated syndrome, relapsing remitting MS, and active secondary progressive disease.
“Biosimilar medications offer additional effective treatment options that have the potential to increase access for people living with relapsing forms of multiple sclerosis. [This] approval could have a meaningful impact for patients managing their disease,” Paul R. Lee, MD, PhD, director of the division of neurology II, FDA Center for Drug Evaluation and Research, said in a statement.
The natalizumab biosimilar is given using the same dosing and administration schedule. Like the reference product, it is indicated for adults with moderately to severely active Crohn’s disease unresponsive to other medications.
The approval of the natalizumab biosimilar is based on results of the phase 3 Antelope trial, which showed no clinically meaningful differences between it and the reference product.
The trial included 264 adults (mean age, 36 years; 61% women) with relapsing remitting MS from 48 centers in seven Eastern European countries.
All were randomly assigned to receive intravenous infusions every 4 weeks of 300 mg of the natalizumab biosimilar or the reference product for a total of 12 infusions.
At 24 and 48 weeks, there were no between-group differences in annualized relapse rates or Expanded Disability Status Scale scores, which were similar between treatment groups at baseline. There were also no significant differences in safety, tolerability, or immunogenicity.
The prescribing information for both natalizumab products includes a boxed warning about the increased risk of progressive multifocal leukoencephalopathy (PML), a viral infection of the brain that usually leads to death or severe disability.
Risk factors for the development of PML include the presence of antibodies to the JC virus, longer duration of therapy, and prior use of immunosuppressants.
“These factors should be considered in the context of expected benefit when initiating and continuing treatment with natalizumab products, and health care providers should monitor patients and withhold treatment immediately at the first sign or symptom suggestive of PML,” the FDA advises.
Because of the risks of PML, natalizumab products are available only through a restricted drug distribution program under a risk evaluation and mitigation strategy.
In a statement, Sandoz said it’s committed to having the product available in the United States “as soon as possible.”
A version of this article appeared on Medscape.com.
Gene therapy offers new way to fight alcohol use disorder
Researchers from Oregon Health & Science University, Portland implanted the therapy directly into the brains of rhesus monkeys that had been conditioned to drink 8-10 alcoholic drinks a day. A harmless virus that carried a specific gene was placed in the region of the brain that regulates dopamine, which provides feelings of reward and pleasure.
“We wanted to see if we could normalize the dopamine in these motivational areas – if, indeed, motivation to overdrink or drink heavily would be mitigated,” said study author Kathleen Grant, PhD, a professor and chief of the division of neuroscience at the university’s Oregon National Primate Research Center.
The need for new alcohol use disorder treatments may be more dire than ever. Alcohol-related deaths in the United States increased dramatically between 2007 and 2020, especially in women, according to research published in the journal JAMA Network Open. The next year, they spiked again, to 108,791 alcohol-related deaths in 2021 alone, according to the National Institutes of Health. That’s slightly more than the number of drug overdoses recorded in 2021.
For the 29.5 million Americans with alcohol use disorder, also known as alcohol abuse or dependence, the road to recovery can be challenging. One reason is that the reward systems in their brains are working against them.
At the first taste of alcohol, the body releases dopamine. But if a person drinks too much for too long, the brain reduces dopamine production and even more alcohol is needed to feel good again.
The gene researchers placed in the monkeys’ brains is called glial-derived neurotrophic factor. It is a growth factor, stimulating cells to multiply. It may help improve function of brain cells that synthesize dopamine, effectively resetting the whole system and reducing the urge to drink.
The study was surprisingly successful. Compared with primates that received a placebo, those that received the growth factor gene decreased their drinking by about 90%. They basically quit drinking, while the primates that got the placebo resumed their habit.
A similar procedure is already used in patients with Parkinson’s disease. But more animal studies, and human clinical trials, would be needed before this therapy could be used in humans with alcohol use disorder. This invasive treatment involves brain surgery, which has risks, so it would likely be reserved for those with the most severe, dangerous drinking habits.
“I think it’d be appropriate for individuals where other treatment modalities just weren’t effective, and they’re worried for their lives,” Dr. Grant said.
Alcohol use disorder treatments
Today, treatment for alcohol use disorder ranges from a brief conversation with a health care provider, in mild cases, to psychiatric treatment or medication in moderate or severe cases.
There are four Food and Drug Administration–approved treatments for alcohol use disorder and a few more medications that health care providers can prescribe off label.
“They’re not widely used,” said Henry Kranzler, MD, a professor of psychiatry and director of the Center for Studies of Addiction at the University of Pennsylvania, Philadelphia. “They’re shockingly underutilized.”
One reason: Just 4.6% of people with alcohol use disorder seek treatment each year, according to NIH data.
“Some of the issues include the ubiquity of alcohol, and its acceptance in American culture – and the fact that that makes it difficult for people to acknowledge that they have a problem with alcohol,” said Dr. Kranzler.
But another problem is that many health care professionals don’t recognize and treat alcohol use disorder in patients who do seek care. Those seeking treatment for alcohol use disorder can find a qualified provider at the American Academy of Addiction Psychiatry or American Society of Addiction Medicine directories.
The future of treatment
Ongoing research could lead to more treatments, and make them more available and more appealing.
Unlike many other drugs that work on a single receptor in the body – like opioids that target opioid receptors, or nicotine, which targets choline receptors – alcohol affects many different receptors, said Robert Swift, MD, PhD, a professor of psychiatry and human behavior at Brown University, Providence, R.I. It also penetrates cells at high doses.
“There are so many different effects of alcohol, which makes it very hard to treat,” he said. “But on the other hand, it gives us an advantage, and there are probably different points that we can attack.”
Other exciting developments are underway, although more research, including clinical trials in humans, is needed before they arrive.
Some of the most promising:
- Hallucinogens. In the 1950s, before they became illegal, these drugs helped people drink less. Even Bill Wilson, cofounder of Alcoholics Anonymous, used hallucinogenic treatment in his recovery; it helped him envision overcoming a challenge. Today, there is renewed interest in hallucinogens for alcohol use disorder. In a study published in , people with alcohol use disorder who were given the hallucinogen psilocybin along with therapy spent fewer days drinking heavily over the following 32 weeks than people who received a different medication. Don’t try to do this yourself, though. “It’s not just taking a hallucinogen and having a trip,” Dr. Swift said. “It’s a therapy-guided session, so it’s a combination of using the hallucinogenic substance with a skilled therapist, and sometimes two skilled therapists, helping to guide the experience.”
- Epigenetic editing. Alcohol exposure can affect the activity of a gene in the amygdala, a brain region involved in emotional processing. found that, by editing that gene in rats through an intravenous line of genetic material, they reduced the rodents’ drinking and anxiety.
- Oxytocin. The so-called love hormone could help reset the dopamine system to make alcohol less appealing. “There are oxytocin receptors on dopamine neurons, and oxytocin makes your dopamine system more effective,” Dr. Swift said. In a from the Medical University of South Carolina, Charleston, mice injected with oxytocin didn’t drink during a stressful situation that could have otherwise led to relapse.
- Ghrelin. This stomach hormone could help curb drinking. In a study published in , mice that received drugs that increased ghrelin reduced their alcohol intake.
A version of this article first appeared on WebMD.com.
Researchers from Oregon Health & Science University, Portland implanted the therapy directly into the brains of rhesus monkeys that had been conditioned to drink 8-10 alcoholic drinks a day. A harmless virus that carried a specific gene was placed in the region of the brain that regulates dopamine, which provides feelings of reward and pleasure.
“We wanted to see if we could normalize the dopamine in these motivational areas – if, indeed, motivation to overdrink or drink heavily would be mitigated,” said study author Kathleen Grant, PhD, a professor and chief of the division of neuroscience at the university’s Oregon National Primate Research Center.
The need for new alcohol use disorder treatments may be more dire than ever. Alcohol-related deaths in the United States increased dramatically between 2007 and 2020, especially in women, according to research published in the journal JAMA Network Open. The next year, they spiked again, to 108,791 alcohol-related deaths in 2021 alone, according to the National Institutes of Health. That’s slightly more than the number of drug overdoses recorded in 2021.
For the 29.5 million Americans with alcohol use disorder, also known as alcohol abuse or dependence, the road to recovery can be challenging. One reason is that the reward systems in their brains are working against them.
At the first taste of alcohol, the body releases dopamine. But if a person drinks too much for too long, the brain reduces dopamine production and even more alcohol is needed to feel good again.
The gene researchers placed in the monkeys’ brains is called glial-derived neurotrophic factor. It is a growth factor, stimulating cells to multiply. It may help improve function of brain cells that synthesize dopamine, effectively resetting the whole system and reducing the urge to drink.
The study was surprisingly successful. Compared with primates that received a placebo, those that received the growth factor gene decreased their drinking by about 90%. They basically quit drinking, while the primates that got the placebo resumed their habit.
A similar procedure is already used in patients with Parkinson’s disease. But more animal studies, and human clinical trials, would be needed before this therapy could be used in humans with alcohol use disorder. This invasive treatment involves brain surgery, which has risks, so it would likely be reserved for those with the most severe, dangerous drinking habits.
“I think it’d be appropriate for individuals where other treatment modalities just weren’t effective, and they’re worried for their lives,” Dr. Grant said.
Alcohol use disorder treatments
Today, treatment for alcohol use disorder ranges from a brief conversation with a health care provider, in mild cases, to psychiatric treatment or medication in moderate or severe cases.
There are four Food and Drug Administration–approved treatments for alcohol use disorder and a few more medications that health care providers can prescribe off label.
“They’re not widely used,” said Henry Kranzler, MD, a professor of psychiatry and director of the Center for Studies of Addiction at the University of Pennsylvania, Philadelphia. “They’re shockingly underutilized.”
One reason: Just 4.6% of people with alcohol use disorder seek treatment each year, according to NIH data.
“Some of the issues include the ubiquity of alcohol, and its acceptance in American culture – and the fact that that makes it difficult for people to acknowledge that they have a problem with alcohol,” said Dr. Kranzler.
But another problem is that many health care professionals don’t recognize and treat alcohol use disorder in patients who do seek care. Those seeking treatment for alcohol use disorder can find a qualified provider at the American Academy of Addiction Psychiatry or American Society of Addiction Medicine directories.
The future of treatment
Ongoing research could lead to more treatments, and make them more available and more appealing.
Unlike many other drugs that work on a single receptor in the body – like opioids that target opioid receptors, or nicotine, which targets choline receptors – alcohol affects many different receptors, said Robert Swift, MD, PhD, a professor of psychiatry and human behavior at Brown University, Providence, R.I. It also penetrates cells at high doses.
“There are so many different effects of alcohol, which makes it very hard to treat,” he said. “But on the other hand, it gives us an advantage, and there are probably different points that we can attack.”
Other exciting developments are underway, although more research, including clinical trials in humans, is needed before they arrive.
Some of the most promising:
- Hallucinogens. In the 1950s, before they became illegal, these drugs helped people drink less. Even Bill Wilson, cofounder of Alcoholics Anonymous, used hallucinogenic treatment in his recovery; it helped him envision overcoming a challenge. Today, there is renewed interest in hallucinogens for alcohol use disorder. In a study published in , people with alcohol use disorder who were given the hallucinogen psilocybin along with therapy spent fewer days drinking heavily over the following 32 weeks than people who received a different medication. Don’t try to do this yourself, though. “It’s not just taking a hallucinogen and having a trip,” Dr. Swift said. “It’s a therapy-guided session, so it’s a combination of using the hallucinogenic substance with a skilled therapist, and sometimes two skilled therapists, helping to guide the experience.”
- Epigenetic editing. Alcohol exposure can affect the activity of a gene in the amygdala, a brain region involved in emotional processing. found that, by editing that gene in rats through an intravenous line of genetic material, they reduced the rodents’ drinking and anxiety.
- Oxytocin. The so-called love hormone could help reset the dopamine system to make alcohol less appealing. “There are oxytocin receptors on dopamine neurons, and oxytocin makes your dopamine system more effective,” Dr. Swift said. In a from the Medical University of South Carolina, Charleston, mice injected with oxytocin didn’t drink during a stressful situation that could have otherwise led to relapse.
- Ghrelin. This stomach hormone could help curb drinking. In a study published in , mice that received drugs that increased ghrelin reduced their alcohol intake.
A version of this article first appeared on WebMD.com.
Researchers from Oregon Health & Science University, Portland implanted the therapy directly into the brains of rhesus monkeys that had been conditioned to drink 8-10 alcoholic drinks a day. A harmless virus that carried a specific gene was placed in the region of the brain that regulates dopamine, which provides feelings of reward and pleasure.
“We wanted to see if we could normalize the dopamine in these motivational areas – if, indeed, motivation to overdrink or drink heavily would be mitigated,” said study author Kathleen Grant, PhD, a professor and chief of the division of neuroscience at the university’s Oregon National Primate Research Center.
The need for new alcohol use disorder treatments may be more dire than ever. Alcohol-related deaths in the United States increased dramatically between 2007 and 2020, especially in women, according to research published in the journal JAMA Network Open. The next year, they spiked again, to 108,791 alcohol-related deaths in 2021 alone, according to the National Institutes of Health. That’s slightly more than the number of drug overdoses recorded in 2021.
For the 29.5 million Americans with alcohol use disorder, also known as alcohol abuse or dependence, the road to recovery can be challenging. One reason is that the reward systems in their brains are working against them.
At the first taste of alcohol, the body releases dopamine. But if a person drinks too much for too long, the brain reduces dopamine production and even more alcohol is needed to feel good again.
The gene researchers placed in the monkeys’ brains is called glial-derived neurotrophic factor. It is a growth factor, stimulating cells to multiply. It may help improve function of brain cells that synthesize dopamine, effectively resetting the whole system and reducing the urge to drink.
The study was surprisingly successful. Compared with primates that received a placebo, those that received the growth factor gene decreased their drinking by about 90%. They basically quit drinking, while the primates that got the placebo resumed their habit.
A similar procedure is already used in patients with Parkinson’s disease. But more animal studies, and human clinical trials, would be needed before this therapy could be used in humans with alcohol use disorder. This invasive treatment involves brain surgery, which has risks, so it would likely be reserved for those with the most severe, dangerous drinking habits.
“I think it’d be appropriate for individuals where other treatment modalities just weren’t effective, and they’re worried for their lives,” Dr. Grant said.
Alcohol use disorder treatments
Today, treatment for alcohol use disorder ranges from a brief conversation with a health care provider, in mild cases, to psychiatric treatment or medication in moderate or severe cases.
There are four Food and Drug Administration–approved treatments for alcohol use disorder and a few more medications that health care providers can prescribe off label.
“They’re not widely used,” said Henry Kranzler, MD, a professor of psychiatry and director of the Center for Studies of Addiction at the University of Pennsylvania, Philadelphia. “They’re shockingly underutilized.”
One reason: Just 4.6% of people with alcohol use disorder seek treatment each year, according to NIH data.
“Some of the issues include the ubiquity of alcohol, and its acceptance in American culture – and the fact that that makes it difficult for people to acknowledge that they have a problem with alcohol,” said Dr. Kranzler.
But another problem is that many health care professionals don’t recognize and treat alcohol use disorder in patients who do seek care. Those seeking treatment for alcohol use disorder can find a qualified provider at the American Academy of Addiction Psychiatry or American Society of Addiction Medicine directories.
The future of treatment
Ongoing research could lead to more treatments, and make them more available and more appealing.
Unlike many other drugs that work on a single receptor in the body – like opioids that target opioid receptors, or nicotine, which targets choline receptors – alcohol affects many different receptors, said Robert Swift, MD, PhD, a professor of psychiatry and human behavior at Brown University, Providence, R.I. It also penetrates cells at high doses.
“There are so many different effects of alcohol, which makes it very hard to treat,” he said. “But on the other hand, it gives us an advantage, and there are probably different points that we can attack.”
Other exciting developments are underway, although more research, including clinical trials in humans, is needed before they arrive.
Some of the most promising:
- Hallucinogens. In the 1950s, before they became illegal, these drugs helped people drink less. Even Bill Wilson, cofounder of Alcoholics Anonymous, used hallucinogenic treatment in his recovery; it helped him envision overcoming a challenge. Today, there is renewed interest in hallucinogens for alcohol use disorder. In a study published in , people with alcohol use disorder who were given the hallucinogen psilocybin along with therapy spent fewer days drinking heavily over the following 32 weeks than people who received a different medication. Don’t try to do this yourself, though. “It’s not just taking a hallucinogen and having a trip,” Dr. Swift said. “It’s a therapy-guided session, so it’s a combination of using the hallucinogenic substance with a skilled therapist, and sometimes two skilled therapists, helping to guide the experience.”
- Epigenetic editing. Alcohol exposure can affect the activity of a gene in the amygdala, a brain region involved in emotional processing. found that, by editing that gene in rats through an intravenous line of genetic material, they reduced the rodents’ drinking and anxiety.
- Oxytocin. The so-called love hormone could help reset the dopamine system to make alcohol less appealing. “There are oxytocin receptors on dopamine neurons, and oxytocin makes your dopamine system more effective,” Dr. Swift said. In a from the Medical University of South Carolina, Charleston, mice injected with oxytocin didn’t drink during a stressful situation that could have otherwise led to relapse.
- Ghrelin. This stomach hormone could help curb drinking. In a study published in , mice that received drugs that increased ghrelin reduced their alcohol intake.
A version of this article first appeared on WebMD.com.
FROM NATURE MEDICINE