MDedge Neurology

French researchers have been working on an innovative vaccine that targets tick microbiota to indirectly reduce the bacterial load within the vector. The results of their study were published in the journal Microbiome.

Ticks are vectors of many harmful pathogens that can cause life-threatening illnesses. Ixodes ricinus (in Europe) and Ixodes scapularis (in Canada and the United States) carry Borrelia, the bacteria that cause Lyme disease. At the moment, there is no vaccine for this disease. But that could all change, thanks to the findings of scientists at the National Research Institute for Agriculture, Food, and Environment (INRAE), in collaboration with the Agency for Food, Environmental, and Occupational Health and Safety and the National Veterinary School of Alfort, France.

“Ticks can transmit a broad variety of pathogens of medical importance, including Borrelia afzelii, the causative agent of Lyme borreliosis in Europe. Tick microbiota is an important factor modulating not only vector physiology, but also the vector competence,” the team reported. They focused their efforts on developing a vaccine that would disturb the tick microbiota and thus reduce Borrelia colonization.

To explore this indirect approach, they injected a harmless strain of Escherichia coli bacteria into mice, which then produced antibodies. Their reasoning was that when a tick bites one of these mice, the antibodies would pass into the arachnid’s microbiota and disturb it, thereby making the tick less harmful. And indeed, the researchers’ work showed that in the ticks that fed on vaccinated mice, levels of Borrelia levels were much lower than in than ticks that fed on unvaccinated mice (see video for an explanation). So, when given to a mouse, this vaccine “protects” the tick against colonization by Borrelia but does not protect the mouse against the disease.

The study has advanced this area of research in two significant ways: It provides new information on the importance of the microbiota when it comes to ticks that are infected with Borrelia, and it suggests an innovative vaccination strategy. Indeed, the results confirm that tick microbiota is essential for the development of Borrelia in the arachnid. As noted in an INRAE press release, “This is a key piece of data that opens the door to one day having an innovative vaccination strategy aimed at perturbing the microbiota of the vector of the Lyme disease agent.”

Dengue, Zika virus, and malaria are also transmitted by a vector – the mosquito. Innovative antimicrobiota vaccines may be able to control these diseases as well.

This article was translated from the Medscape French Edition. A version of this article appeared on Medscape.com.

French researchers have been working on an innovative vaccine that targets tick microbiota to indirectly reduce the bacterial load within the vector. The results of their study were published in the journal Microbiome.

Ticks are vectors of many harmful pathogens that can cause life-threatening illnesses. Ixodes ricinus (in Europe) and Ixodes scapularis (in Canada and the United States) carry Borrelia, the bacteria that cause Lyme disease. At the moment, there is no vaccine for this disease. But that could all change, thanks to the findings of scientists at the National Research Institute for Agriculture, Food, and Environment (INRAE), in collaboration with the Agency for Food, Environmental, and Occupational Health and Safety and the National Veterinary School of Alfort, France.

“Ticks can transmit a broad variety of pathogens of medical importance, including Borrelia afzelii, the causative agent of Lyme borreliosis in Europe. Tick microbiota is an important factor modulating not only vector physiology, but also the vector competence,” the team reported. They focused their efforts on developing a vaccine that would disturb the tick microbiota and thus reduce Borrelia colonization.

To explore this indirect approach, they injected a harmless strain of Escherichia coli bacteria into mice, which then produced antibodies. Their reasoning was that when a tick bites one of these mice, the antibodies would pass into the arachnid’s microbiota and disturb it, thereby making the tick less harmful. And indeed, the researchers’ work showed that in the ticks that fed on vaccinated mice, levels of Borrelia levels were much lower than in than ticks that fed on unvaccinated mice (see video for an explanation). So, when given to a mouse, this vaccine “protects” the tick against colonization by Borrelia but does not protect the mouse against the disease.

The study has advanced this area of research in two significant ways: It provides new information on the importance of the microbiota when it comes to ticks that are infected with Borrelia, and it suggests an innovative vaccination strategy. Indeed, the results confirm that tick microbiota is essential for the development of Borrelia in the arachnid. As noted in an INRAE press release, “This is a key piece of data that opens the door to one day having an innovative vaccination strategy aimed at perturbing the microbiota of the vector of the Lyme disease agent.”

Dengue, Zika virus, and malaria are also transmitted by a vector – the mosquito. Innovative antimicrobiota vaccines may be able to control these diseases as well.

This article was translated from the Medscape French Edition. A version of this article appeared on Medscape.com.

French researchers have been working on an innovative vaccine that targets tick microbiota to indirectly reduce the bacterial load within the vector. The results of their study were published in the journal Microbiome.

Ticks are vectors of many harmful pathogens that can cause life-threatening illnesses. Ixodes ricinus (in Europe) and Ixodes scapularis (in Canada and the United States) carry Borrelia, the bacteria that cause Lyme disease. At the moment, there is no vaccine for this disease. But that could all change, thanks to the findings of scientists at the National Research Institute for Agriculture, Food, and Environment (INRAE), in collaboration with the Agency for Food, Environmental, and Occupational Health and Safety and the National Veterinary School of Alfort, France.

“Ticks can transmit a broad variety of pathogens of medical importance, including Borrelia afzelii, the causative agent of Lyme borreliosis in Europe. Tick microbiota is an important factor modulating not only vector physiology, but also the vector competence,” the team reported. They focused their efforts on developing a vaccine that would disturb the tick microbiota and thus reduce Borrelia colonization.

To explore this indirect approach, they injected a harmless strain of Escherichia coli bacteria into mice, which then produced antibodies. Their reasoning was that when a tick bites one of these mice, the antibodies would pass into the arachnid’s microbiota and disturb it, thereby making the tick less harmful. And indeed, the researchers’ work showed that in the ticks that fed on vaccinated mice, levels of Borrelia levels were much lower than in than ticks that fed on unvaccinated mice (see video for an explanation). So, when given to a mouse, this vaccine “protects” the tick against colonization by Borrelia but does not protect the mouse against the disease.

The study has advanced this area of research in two significant ways: It provides new information on the importance of the microbiota when it comes to ticks that are infected with Borrelia, and it suggests an innovative vaccination strategy. Indeed, the results confirm that tick microbiota is essential for the development of Borrelia in the arachnid. As noted in an INRAE press release, “This is a key piece of data that opens the door to one day having an innovative vaccination strategy aimed at perturbing the microbiota of the vector of the Lyme disease agent.”

Dengue, Zika virus, and malaria are also transmitted by a vector – the mosquito. Innovative antimicrobiota vaccines may be able to control these diseases as well.

This article was translated from the Medscape French Edition. A version of this article appeared on Medscape.com.

New research suggests a potential link between playing tackle football and an increased risk of developing parkinsonism or Parkinson’s disease (PD).

In a cross-sectional study of older men, former tackle football players had a 61% higher likelihood of reporting a diagnosis of parkinsonism or PD, compared with men who played non-football sports.

solar22/Thinkstock

Longer duration of football participation and higher level of play (college and professional) were associated with higher risk.

Lead researcher Michael L. Alosco, PhD, director of the Boston University Alzheimer’s Disease Research Center, said it’s important to note that the findings are from a cohort of men “enriched” for having PD.

“These are people who are likely already concerned for or at risk for having this disease. We don’t yet know how our findings translate to the general population,” Dr. Alosco said in an interview.

The study was published online in JAMA Network Open.
 

Repetitive head impacts

Dating back to the 1920s, PD and parkinsonism an umbrella term that refers to motor symptoms associated with PD and other conditions have long been described in boxers who suffer repetitive head impacts.

Multiple studies have linked tackle football with progressive brain diseases such as chronic traumatic encephalopathy. Few studies, however, have investigated the association between participation in football and PD.

For their study, Dr. Alosco and colleagues leveraged data from Fox Insight, a longitudinal online study of some people with and some without PD that is sponsored by the Michael J. Fox Foundation for Parkinson’s Research.

They focused their analyses on 1,875 men (mean age, 67 years) who reported playing any organized sport. As noted, the cohort was enriched for parkinsonism or PD. A total of 1,602 (85%) had received a diagnosis of parkinsonism/PD, and 273 had not.

Altogether, 729 men had a history of playing tackle football, and 1,146 men played non-football sports (control group). Among the football players, 82% played at youth sports or at the high school level; 17% played at the college level; and fewer than 1% played at the pro or semi-pro level.

Among the football players, 648 (89%) reported a parkinsonism/PD diagnosis.

A history of playing football was associated with higher odds of reporting a parkinsonism/PD diagnosis (odds ratio, 1.61; 95% confidence interval, 1.19-2.17) after accounting for age, education level, history of diabetes and heart disease, body mass index (BMI), traumatic brain injury with loss of consciousness, and family history of PD.

Football players who had longer careers and who played at higher levels of competition were at increased risk of having parkinsonism or PD.

Playing one to four seasons yielded an OR of 1.39 (95% CI, 0.98-1.98). The OR was 2.18 (95% CI, 1.36-3.49) for playing five or more seasons.

Football players who competed at the college or professional level had nearly triple the odds of reporting a parkinsonism/PD diagnosis (OR, 2.93; 95% CI, 1.28-6.73), compared with athletes who played at the youth or high school level.

Age at first exposure to football was not associated with a parkinsonism/PD diagnosis.

The researchers cautioned that this was a convenience sample of mostly White people, and the sample was enriched for having PD – factors that limit the generalizability of the findings.

Also, diagnosis of PD was self-reported by participants through online assessments, and objective in-person evaluations were not conducted.
 

Unequivocal link?

“This is among the first and largest to look at the relationship between football and having a diagnosis of PD in a large cohort of people from the Fox Insight online study,” Dr. Alosco said.

He cautioned that “not all people who play football will develop later-life neurological problems. That being said, the study adds to the accumulating evidence that suggests playing football is one risk factor for the development of later-life brain diseases.

“This represents an opportunity to educate the communities on the potential risks of playing football (short and long term), including what we know and what we don’t know, so that people can make informed decisions on participating in tackle football and develop additional ways to mitigate risk,” Dr. Alosco said.

In a comment, Shaheen Lakhan, MD, PhD, a neurologist and researcher from Boston, said: “The emerging body of research leaves little doubt that engaging in football raises the risk of developing Parkinson’s disease and parkinsonism.

“This progressive line of investigation serves to enhance our understanding, unequivocally demonstrating that even participation in amateur football, including at the youth and high school levels, constitutes a significant risk factor for the onset of Parkinson’s disease,” said Dr. Lakhan, who was not involved in the study.

However, he said it’s “crucial to underscore that the statistics reveal a notable distinction: individuals who have a history of college or professional football play face odds nearly three times higher of receiving a diagnosis of parkinsonism or Parkinson’s disease when compared to their counterparts who engaged in football during their youth or high-school years.

“Ultimately, determinations regarding involvement in sports should be a collaborative endeavor involving parents, young athletes, and health care providers. It is incumbent upon physicians to equip parents and youth with a comprehensive comprehension of the potential risks and rewards inherent in football participation,” Dr. Lakhan said.

He added, though, that there are multifaceted advantages to playing football. “This pursuit nurtures cardiovascular well-being, fosters invaluable social interactions, cultivates teamwork, instills discipline through regimented routines, and hones a spectrum of physical proficiencies,” Dr. Lakhan said.

“It’s worth noting that a constellation of alternative sports, including track and field, swimming, soccer, baseball, and tennis, can be cogently discussed as substitutes, all while preserving the manifold benefits of athletic engagement,” Dr. Lakhan added.

The Fox Insight Study is funded by the Michael J. Fox Foundation for Parkinson’s Research. The study was conducted in collaboration with the Michael J. Fox Foundation for Parkinson’s Research, the sponsor of the Fox Insight study, which collected and aggregated data used in the study. It was also supported by the National Institute of Neurological Disorders and Stroke. Dr. Alosco received grants from the National Institutes of Health during the conduct of the study, an honorarium from the Michael J. Fox Foundation for work unrelated to the study, and royalties from Oxford University Press outside the submitted work. Dr. Lakhan disclosed no relevant financial relationships.

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

New research suggests a potential link between playing tackle football and an increased risk of developing parkinsonism or Parkinson’s disease (PD).

In a cross-sectional study of older men, former tackle football players had a 61% higher likelihood of reporting a diagnosis of parkinsonism or PD, compared with men who played non-football sports.

solar22/Thinkstock

Longer duration of football participation and higher level of play (college and professional) were associated with higher risk.

Lead researcher Michael L. Alosco, PhD, director of the Boston University Alzheimer’s Disease Research Center, said it’s important to note that the findings are from a cohort of men “enriched” for having PD.

“These are people who are likely already concerned for or at risk for having this disease. We don’t yet know how our findings translate to the general population,” Dr. Alosco said in an interview.

The study was published online in JAMA Network Open.
 

Repetitive head impacts

Dating back to the 1920s, PD and parkinsonism an umbrella term that refers to motor symptoms associated with PD and other conditions have long been described in boxers who suffer repetitive head impacts.

Multiple studies have linked tackle football with progressive brain diseases such as chronic traumatic encephalopathy. Few studies, however, have investigated the association between participation in football and PD.

For their study, Dr. Alosco and colleagues leveraged data from Fox Insight, a longitudinal online study of some people with and some without PD that is sponsored by the Michael J. Fox Foundation for Parkinson’s Research.

They focused their analyses on 1,875 men (mean age, 67 years) who reported playing any organized sport. As noted, the cohort was enriched for parkinsonism or PD. A total of 1,602 (85%) had received a diagnosis of parkinsonism/PD, and 273 had not.

Altogether, 729 men had a history of playing tackle football, and 1,146 men played non-football sports (control group). Among the football players, 82% played at youth sports or at the high school level; 17% played at the college level; and fewer than 1% played at the pro or semi-pro level.

Among the football players, 648 (89%) reported a parkinsonism/PD diagnosis.

A history of playing football was associated with higher odds of reporting a parkinsonism/PD diagnosis (odds ratio, 1.61; 95% confidence interval, 1.19-2.17) after accounting for age, education level, history of diabetes and heart disease, body mass index (BMI), traumatic brain injury with loss of consciousness, and family history of PD.

Football players who had longer careers and who played at higher levels of competition were at increased risk of having parkinsonism or PD.

Playing one to four seasons yielded an OR of 1.39 (95% CI, 0.98-1.98). The OR was 2.18 (95% CI, 1.36-3.49) for playing five or more seasons.

Football players who competed at the college or professional level had nearly triple the odds of reporting a parkinsonism/PD diagnosis (OR, 2.93; 95% CI, 1.28-6.73), compared with athletes who played at the youth or high school level.

Age at first exposure to football was not associated with a parkinsonism/PD diagnosis.

The researchers cautioned that this was a convenience sample of mostly White people, and the sample was enriched for having PD – factors that limit the generalizability of the findings.

Also, diagnosis of PD was self-reported by participants through online assessments, and objective in-person evaluations were not conducted.
 

Unequivocal link?

“This is among the first and largest to look at the relationship between football and having a diagnosis of PD in a large cohort of people from the Fox Insight online study,” Dr. Alosco said.

He cautioned that “not all people who play football will develop later-life neurological problems. That being said, the study adds to the accumulating evidence that suggests playing football is one risk factor for the development of later-life brain diseases.

“This represents an opportunity to educate the communities on the potential risks of playing football (short and long term), including what we know and what we don’t know, so that people can make informed decisions on participating in tackle football and develop additional ways to mitigate risk,” Dr. Alosco said.

In a comment, Shaheen Lakhan, MD, PhD, a neurologist and researcher from Boston, said: “The emerging body of research leaves little doubt that engaging in football raises the risk of developing Parkinson’s disease and parkinsonism.

“This progressive line of investigation serves to enhance our understanding, unequivocally demonstrating that even participation in amateur football, including at the youth and high school levels, constitutes a significant risk factor for the onset of Parkinson’s disease,” said Dr. Lakhan, who was not involved in the study.

However, he said it’s “crucial to underscore that the statistics reveal a notable distinction: individuals who have a history of college or professional football play face odds nearly three times higher of receiving a diagnosis of parkinsonism or Parkinson’s disease when compared to their counterparts who engaged in football during their youth or high-school years.

“Ultimately, determinations regarding involvement in sports should be a collaborative endeavor involving parents, young athletes, and health care providers. It is incumbent upon physicians to equip parents and youth with a comprehensive comprehension of the potential risks and rewards inherent in football participation,” Dr. Lakhan said.

He added, though, that there are multifaceted advantages to playing football. “This pursuit nurtures cardiovascular well-being, fosters invaluable social interactions, cultivates teamwork, instills discipline through regimented routines, and hones a spectrum of physical proficiencies,” Dr. Lakhan said.

“It’s worth noting that a constellation of alternative sports, including track and field, swimming, soccer, baseball, and tennis, can be cogently discussed as substitutes, all while preserving the manifold benefits of athletic engagement,” Dr. Lakhan added.

The Fox Insight Study is funded by the Michael J. Fox Foundation for Parkinson’s Research. The study was conducted in collaboration with the Michael J. Fox Foundation for Parkinson’s Research, the sponsor of the Fox Insight study, which collected and aggregated data used in the study. It was also supported by the National Institute of Neurological Disorders and Stroke. Dr. Alosco received grants from the National Institutes of Health during the conduct of the study, an honorarium from the Michael J. Fox Foundation for work unrelated to the study, and royalties from Oxford University Press outside the submitted work. Dr. Lakhan disclosed no relevant financial relationships.

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

New research suggests a potential link between playing tackle football and an increased risk of developing parkinsonism or Parkinson’s disease (PD).

In a cross-sectional study of older men, former tackle football players had a 61% higher likelihood of reporting a diagnosis of parkinsonism or PD, compared with men who played non-football sports.

solar22/Thinkstock

Longer duration of football participation and higher level of play (college and professional) were associated with higher risk.

Lead researcher Michael L. Alosco, PhD, director of the Boston University Alzheimer’s Disease Research Center, said it’s important to note that the findings are from a cohort of men “enriched” for having PD.

“These are people who are likely already concerned for or at risk for having this disease. We don’t yet know how our findings translate to the general population,” Dr. Alosco said in an interview.

The study was published online in JAMA Network Open.
 

Repetitive head impacts

Dating back to the 1920s, PD and parkinsonism an umbrella term that refers to motor symptoms associated with PD and other conditions have long been described in boxers who suffer repetitive head impacts.

Multiple studies have linked tackle football with progressive brain diseases such as chronic traumatic encephalopathy. Few studies, however, have investigated the association between participation in football and PD.

For their study, Dr. Alosco and colleagues leveraged data from Fox Insight, a longitudinal online study of some people with and some without PD that is sponsored by the Michael J. Fox Foundation for Parkinson’s Research.

They focused their analyses on 1,875 men (mean age, 67 years) who reported playing any organized sport. As noted, the cohort was enriched for parkinsonism or PD. A total of 1,602 (85%) had received a diagnosis of parkinsonism/PD, and 273 had not.

Altogether, 729 men had a history of playing tackle football, and 1,146 men played non-football sports (control group). Among the football players, 82% played at youth sports or at the high school level; 17% played at the college level; and fewer than 1% played at the pro or semi-pro level.

Among the football players, 648 (89%) reported a parkinsonism/PD diagnosis.

A history of playing football was associated with higher odds of reporting a parkinsonism/PD diagnosis (odds ratio, 1.61; 95% confidence interval, 1.19-2.17) after accounting for age, education level, history of diabetes and heart disease, body mass index (BMI), traumatic brain injury with loss of consciousness, and family history of PD.

Football players who had longer careers and who played at higher levels of competition were at increased risk of having parkinsonism or PD.

Playing one to four seasons yielded an OR of 1.39 (95% CI, 0.98-1.98). The OR was 2.18 (95% CI, 1.36-3.49) for playing five or more seasons.

Football players who competed at the college or professional level had nearly triple the odds of reporting a parkinsonism/PD diagnosis (OR, 2.93; 95% CI, 1.28-6.73), compared with athletes who played at the youth or high school level.

Age at first exposure to football was not associated with a parkinsonism/PD diagnosis.

The researchers cautioned that this was a convenience sample of mostly White people, and the sample was enriched for having PD – factors that limit the generalizability of the findings.

Also, diagnosis of PD was self-reported by participants through online assessments, and objective in-person evaluations were not conducted.
 

Unequivocal link?

“This is among the first and largest to look at the relationship between football and having a diagnosis of PD in a large cohort of people from the Fox Insight online study,” Dr. Alosco said.

He cautioned that “not all people who play football will develop later-life neurological problems. That being said, the study adds to the accumulating evidence that suggests playing football is one risk factor for the development of later-life brain diseases.

“This represents an opportunity to educate the communities on the potential risks of playing football (short and long term), including what we know and what we don’t know, so that people can make informed decisions on participating in tackle football and develop additional ways to mitigate risk,” Dr. Alosco said.

In a comment, Shaheen Lakhan, MD, PhD, a neurologist and researcher from Boston, said: “The emerging body of research leaves little doubt that engaging in football raises the risk of developing Parkinson’s disease and parkinsonism.

“This progressive line of investigation serves to enhance our understanding, unequivocally demonstrating that even participation in amateur football, including at the youth and high school levels, constitutes a significant risk factor for the onset of Parkinson’s disease,” said Dr. Lakhan, who was not involved in the study.

However, he said it’s “crucial to underscore that the statistics reveal a notable distinction: individuals who have a history of college or professional football play face odds nearly three times higher of receiving a diagnosis of parkinsonism or Parkinson’s disease when compared to their counterparts who engaged in football during their youth or high-school years.

“Ultimately, determinations regarding involvement in sports should be a collaborative endeavor involving parents, young athletes, and health care providers. It is incumbent upon physicians to equip parents and youth with a comprehensive comprehension of the potential risks and rewards inherent in football participation,” Dr. Lakhan said.

He added, though, that there are multifaceted advantages to playing football. “This pursuit nurtures cardiovascular well-being, fosters invaluable social interactions, cultivates teamwork, instills discipline through regimented routines, and hones a spectrum of physical proficiencies,” Dr. Lakhan said.

“It’s worth noting that a constellation of alternative sports, including track and field, swimming, soccer, baseball, and tennis, can be cogently discussed as substitutes, all while preserving the manifold benefits of athletic engagement,” Dr. Lakhan added.

The Fox Insight Study is funded by the Michael J. Fox Foundation for Parkinson’s Research. The study was conducted in collaboration with the Michael J. Fox Foundation for Parkinson’s Research, the sponsor of the Fox Insight study, which collected and aggregated data used in the study. It was also supported by the National Institute of Neurological Disorders and Stroke. Dr. Alosco received grants from the National Institutes of Health during the conduct of the study, an honorarium from the Michael J. Fox Foundation for work unrelated to the study, and royalties from Oxford University Press outside the submitted work. Dr. Lakhan disclosed no relevant financial relationships.

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

A large brain imaging study of adults with six different psychiatric illnesses shows that heterogeneity in regional gray matter volume deviations is a general feature of psychiatric illness, but that these regionally heterogeneous areas are often embedded within common functional circuits and networks.

The findings suggest that “targeting brain circuits, rather than specific brain regions, may be a more effective way of developing new treatments,” study investigator Ashlea Segal said in an email.

The findings also suggest that it’s “unlikely that a single cause or mechanism of a given disorder exists, and that a ‘one-size-fits-all’ approach to treatment is likely only appropriate for a small subset of individuals. In fact, one size doesn’t fit all. It probably doesn’t even fit most,” said Ms. Segal, a PhD candidate with the Turner Institute for Brain and Mental Health’s Neural Systems and Behaviour Lab at Monash University in Melbourne.

“Focusing on brain alterations at an individual level allows us to develop more personally tailored treatments,” Ms. Segal added.

Regional heterogeneity, the authors write, “thus offers a plausible explanation for the well-described clinical heterogeneity observed in psychiatric disorders, while circuit- and network-level aggregation of deviations is a putative neural substrate for phenotypic similarities between patients assigned the same diagnosis.”

The study was published online in Nature Neuroscience
 

Beyond group averages

For decades, researchers have mapped brain areas showing reduced gray matter volume (GMV) in people diagnosed with a variety of mental illnesses, but these maps have only been generated at the level of group averages, Ms. Segal explained.

“This means that we understand how the brains of people with, say, schizophrenia, differ from those without schizophrenia on average, but we can’t really say much about individual people,” Ms. Segal said.

For their study, the researchers used new statistical techniques developed by Andre Marquand, PhD, who co-led the project, to characterize the heterogeneity of GMV differences in 1,294 individuals diagnosed with one of six psychiatric conditions and 1,465 matched controls. Dr. Marquand is affiliated with the Donders Institute for Brain, Cognition, and Behavior in Nijmegen, the Netherlands.

These techniques “allow us to benchmark the size of over 1,000 different brain regions in any given person relative to what we should expect to see in the general population. In this way, we can identify, for any person, brain regions showing unusually small or large volumes, given that person’s age and sex,” Ms. Segal told this news organization.

The clinical sample included 202 individuals with autism spectrum disorder, 153 with attention-deficit/hyperactivity disorder (ADHD), 228 with bipolar disorder, 161 with major depressive disorder, 167 with obsessive-compulsive disorder, and 383 individuals with schizophrenia.

Confirming earlier findings, those with psychiatric illness showed more GMV deviations than healthy controls, the researchers found.

However, at the individual level, deviations from population expectations for regional gray matter volumes were “highly heterogeneous,” affecting the same area in less than 7% of people with the same diagnosis, they note. “This result means that it is difficult to pinpoint treatment targets or causal mechanisms by focusing on group averages alone,” Alex Fornito, PhD, of Monash University, who led the research team, said in a statement.

“It may also explain why people with the same diagnosis show wide variability in their symptom profiles and treatment outcomes,” Dr. Fornito added.

Yet, despite considerable heterogeneity at the regional level across different diagnoses, these deviations were embedded within common functional circuits and networks in up to 56% of cases. 

The salience-ventral attention network, for example, which plays a central role in cognitive control, interoceptive awareness, and switching between internally and externally focused attention, was implicated across diagnoses, with other neural networks selectively involved in depression, bipolar disorder, schizophrenia, and ADHD.

The researchers say the approach they developed opens new opportunities for mapping brain changes in mental illness.

“The framework we have developed allows us to understand the diversity of brain changes in people with mental illness at different levels, from individual regions through to more widespread brain circuits and networks, offering a deeper insight into how the brain is affected in individual people,” Dr. Fornito said in a statement.

The study had no commercial funding. Ms. Segal, Dr. Fornito, and Dr. Marquand report no relevant financial relationships.

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

A large brain imaging study of adults with six different psychiatric illnesses shows that heterogeneity in regional gray matter volume deviations is a general feature of psychiatric illness, but that these regionally heterogeneous areas are often embedded within common functional circuits and networks.

The findings suggest that “targeting brain circuits, rather than specific brain regions, may be a more effective way of developing new treatments,” study investigator Ashlea Segal said in an email.

The findings also suggest that it’s “unlikely that a single cause or mechanism of a given disorder exists, and that a ‘one-size-fits-all’ approach to treatment is likely only appropriate for a small subset of individuals. In fact, one size doesn’t fit all. It probably doesn’t even fit most,” said Ms. Segal, a PhD candidate with the Turner Institute for Brain and Mental Health’s Neural Systems and Behaviour Lab at Monash University in Melbourne.

“Focusing on brain alterations at an individual level allows us to develop more personally tailored treatments,” Ms. Segal added.

Regional heterogeneity, the authors write, “thus offers a plausible explanation for the well-described clinical heterogeneity observed in psychiatric disorders, while circuit- and network-level aggregation of deviations is a putative neural substrate for phenotypic similarities between patients assigned the same diagnosis.”

The study was published online in Nature Neuroscience
 

Beyond group averages

For decades, researchers have mapped brain areas showing reduced gray matter volume (GMV) in people diagnosed with a variety of mental illnesses, but these maps have only been generated at the level of group averages, Ms. Segal explained.

“This means that we understand how the brains of people with, say, schizophrenia, differ from those without schizophrenia on average, but we can’t really say much about individual people,” Ms. Segal said.

For their study, the researchers used new statistical techniques developed by Andre Marquand, PhD, who co-led the project, to characterize the heterogeneity of GMV differences in 1,294 individuals diagnosed with one of six psychiatric conditions and 1,465 matched controls. Dr. Marquand is affiliated with the Donders Institute for Brain, Cognition, and Behavior in Nijmegen, the Netherlands.

These techniques “allow us to benchmark the size of over 1,000 different brain regions in any given person relative to what we should expect to see in the general population. In this way, we can identify, for any person, brain regions showing unusually small or large volumes, given that person’s age and sex,” Ms. Segal told this news organization.

The clinical sample included 202 individuals with autism spectrum disorder, 153 with attention-deficit/hyperactivity disorder (ADHD), 228 with bipolar disorder, 161 with major depressive disorder, 167 with obsessive-compulsive disorder, and 383 individuals with schizophrenia.

Confirming earlier findings, those with psychiatric illness showed more GMV deviations than healthy controls, the researchers found.

However, at the individual level, deviations from population expectations for regional gray matter volumes were “highly heterogeneous,” affecting the same area in less than 7% of people with the same diagnosis, they note. “This result means that it is difficult to pinpoint treatment targets or causal mechanisms by focusing on group averages alone,” Alex Fornito, PhD, of Monash University, who led the research team, said in a statement.

“It may also explain why people with the same diagnosis show wide variability in their symptom profiles and treatment outcomes,” Dr. Fornito added.

Yet, despite considerable heterogeneity at the regional level across different diagnoses, these deviations were embedded within common functional circuits and networks in up to 56% of cases. 

The salience-ventral attention network, for example, which plays a central role in cognitive control, interoceptive awareness, and switching between internally and externally focused attention, was implicated across diagnoses, with other neural networks selectively involved in depression, bipolar disorder, schizophrenia, and ADHD.

The researchers say the approach they developed opens new opportunities for mapping brain changes in mental illness.

“The framework we have developed allows us to understand the diversity of brain changes in people with mental illness at different levels, from individual regions through to more widespread brain circuits and networks, offering a deeper insight into how the brain is affected in individual people,” Dr. Fornito said in a statement.

The study had no commercial funding. Ms. Segal, Dr. Fornito, and Dr. Marquand report no relevant financial relationships.

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

A large brain imaging study of adults with six different psychiatric illnesses shows that heterogeneity in regional gray matter volume deviations is a general feature of psychiatric illness, but that these regionally heterogeneous areas are often embedded within common functional circuits and networks.

The findings suggest that “targeting brain circuits, rather than specific brain regions, may be a more effective way of developing new treatments,” study investigator Ashlea Segal said in an email.

The findings also suggest that it’s “unlikely that a single cause or mechanism of a given disorder exists, and that a ‘one-size-fits-all’ approach to treatment is likely only appropriate for a small subset of individuals. In fact, one size doesn’t fit all. It probably doesn’t even fit most,” said Ms. Segal, a PhD candidate with the Turner Institute for Brain and Mental Health’s Neural Systems and Behaviour Lab at Monash University in Melbourne.

“Focusing on brain alterations at an individual level allows us to develop more personally tailored treatments,” Ms. Segal added.

Regional heterogeneity, the authors write, “thus offers a plausible explanation for the well-described clinical heterogeneity observed in psychiatric disorders, while circuit- and network-level aggregation of deviations is a putative neural substrate for phenotypic similarities between patients assigned the same diagnosis.”

The study was published online in Nature Neuroscience
 

Beyond group averages

For decades, researchers have mapped brain areas showing reduced gray matter volume (GMV) in people diagnosed with a variety of mental illnesses, but these maps have only been generated at the level of group averages, Ms. Segal explained.

“This means that we understand how the brains of people with, say, schizophrenia, differ from those without schizophrenia on average, but we can’t really say much about individual people,” Ms. Segal said.

For their study, the researchers used new statistical techniques developed by Andre Marquand, PhD, who co-led the project, to characterize the heterogeneity of GMV differences in 1,294 individuals diagnosed with one of six psychiatric conditions and 1,465 matched controls. Dr. Marquand is affiliated with the Donders Institute for Brain, Cognition, and Behavior in Nijmegen, the Netherlands.

These techniques “allow us to benchmark the size of over 1,000 different brain regions in any given person relative to what we should expect to see in the general population. In this way, we can identify, for any person, brain regions showing unusually small or large volumes, given that person’s age and sex,” Ms. Segal told this news organization.

The clinical sample included 202 individuals with autism spectrum disorder, 153 with attention-deficit/hyperactivity disorder (ADHD), 228 with bipolar disorder, 161 with major depressive disorder, 167 with obsessive-compulsive disorder, and 383 individuals with schizophrenia.

Confirming earlier findings, those with psychiatric illness showed more GMV deviations than healthy controls, the researchers found.

However, at the individual level, deviations from population expectations for regional gray matter volumes were “highly heterogeneous,” affecting the same area in less than 7% of people with the same diagnosis, they note. “This result means that it is difficult to pinpoint treatment targets or causal mechanisms by focusing on group averages alone,” Alex Fornito, PhD, of Monash University, who led the research team, said in a statement.

“It may also explain why people with the same diagnosis show wide variability in their symptom profiles and treatment outcomes,” Dr. Fornito added.

Yet, despite considerable heterogeneity at the regional level across different diagnoses, these deviations were embedded within common functional circuits and networks in up to 56% of cases. 

The salience-ventral attention network, for example, which plays a central role in cognitive control, interoceptive awareness, and switching between internally and externally focused attention, was implicated across diagnoses, with other neural networks selectively involved in depression, bipolar disorder, schizophrenia, and ADHD.

The researchers say the approach they developed opens new opportunities for mapping brain changes in mental illness.

“The framework we have developed allows us to understand the diversity of brain changes in people with mental illness at different levels, from individual regions through to more widespread brain circuits and networks, offering a deeper insight into how the brain is affected in individual people,” Dr. Fornito said in a statement.

The study had no commercial funding. Ms. Segal, Dr. Fornito, and Dr. Marquand report no relevant financial relationships.

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

“We were all of us cogs in a great machine which sometimes rolled forward, nobody knew where, sometimes backwards, nobody knew why.” – Ernst Toller

A nice feature of the Apple watch is the stopwatch. With it, I can discreetly click the timer and watch seconds tick away. Tap. There’s one lap. Tap. Two. Tap. That was a quick visit, 6 minutes and 42 seconds. Tap. Under 2 minutes to close the chart. Let’s see if I can beat it. Tap. Tap. What if I moved my Mayo stand over to this side of the room? How about a sign, “All patients must have clothes off if you want a skin exam.” You think ob.gyns. are quick from skin to baby in a stat C-section? You should see how fast I can go from alcohol wipe to Drysol on a biopsy. Seconds. Tick, tick, tap.

Every day I look for ways to go faster. This is not so I can be out the door by 3. Rather, it’s simply to make it through the day without having to log on after we put the kids to bed at night.

Speaking of bedtimes, another nice feature of the Apple watch is the timer. With it, I can set a timer and a lovely chimey alarm will go off. This comes in handy with 3-year-olds. “Sloan, in two minutes we are going to brush your teeth.” Ding. “Sloan, you have one minute to get your pajamas on.” Ding. “Sloanie, I’ll give you 3 more minutes to put the kitties away, then get into bed.” Ding, ding, ding ...

As you can see, using the stopwatch to time a bedtime routine would be demoralizing. If you’ve tried to put a toddler to bed in summer you know. They explore every option to avoid sleeping: one more book (that would make 3), “accidentally” putting their pajamas on backwards, offering to brush their teeth a second time. And once the light is off, “Papa, I have to potty.” No, bedtime routines cannot be standardized. They resist being made efficient.

In contrast, we think of seeing patients as a standardizable process; work to be optimized. This idea that work should be as efficient as possible came from the father of business management, Frederick Taylor. Taylor, a mechanical engineer, observed inefficiencies on the factory floor. His work was seminal in the development of the second industrial revolution. Before then no one had applied scientific rigor to productivity. His book, “The Principles of Scientific Management,” written in 1909, is considered the most influential management book of the 20th century. He was the first to use stopwatches to perform time studies, noting how long each task took with the belief that there was one best way. The worker was an extension of the machine, tuned by management such that he was as efficient as possible.

PublicDomain/commons.wikimedia.org/wiki/File:Ford_assembly_line_-_1913.jpg

A more insidious downside on the drive to efficiency lies in the nature of what we do. We aren’t factory workers punching out widgets, we’re physicians caring for people and people cannot be standardized. In this way, seeing patients is more like putting a toddler to bed than like assembling an iPhone. There will always be by-the-ways, basal cells hiding behind the ear, traffic jams, and bags of products that they want to review. Not sure how to use your fluorouracil? Let’s go over it again. Need to talk more about why you have granuloma annulare? Let me explain. Despite Taylor’s vision, some work simply cannot be optimized. And shouldn’t.

“Where’s my 11:30 patient who checked in half an hour ago?!” I asked my medical assistant. “Oh, she had to go to the bathroom.” Tap.
 

Dr. Benabio is director of Healthcare Transformation and chief of dermatology at Kaiser Permanente San Diego. The opinions expressed in this column are his own and do not represent those of Kaiser Permanente. Dr. Benabio is @Dermdoc on Twitter. Write to him at [email protected].

“We were all of us cogs in a great machine which sometimes rolled forward, nobody knew where, sometimes backwards, nobody knew why.” – Ernst Toller

A nice feature of the Apple watch is the stopwatch. With it, I can discreetly click the timer and watch seconds tick away. Tap. There’s one lap. Tap. Two. Tap. That was a quick visit, 6 minutes and 42 seconds. Tap. Under 2 minutes to close the chart. Let’s see if I can beat it. Tap. Tap. What if I moved my Mayo stand over to this side of the room? How about a sign, “All patients must have clothes off if you want a skin exam.” You think ob.gyns. are quick from skin to baby in a stat C-section? You should see how fast I can go from alcohol wipe to Drysol on a biopsy. Seconds. Tick, tick, tap.

Every day I look for ways to go faster. This is not so I can be out the door by 3. Rather, it’s simply to make it through the day without having to log on after we put the kids to bed at night.

Speaking of bedtimes, another nice feature of the Apple watch is the timer. With it, I can set a timer and a lovely chimey alarm will go off. This comes in handy with 3-year-olds. “Sloan, in two minutes we are going to brush your teeth.” Ding. “Sloan, you have one minute to get your pajamas on.” Ding. “Sloanie, I’ll give you 3 more minutes to put the kitties away, then get into bed.” Ding, ding, ding ...

As you can see, using the stopwatch to time a bedtime routine would be demoralizing. If you’ve tried to put a toddler to bed in summer you know. They explore every option to avoid sleeping: one more book (that would make 3), “accidentally” putting their pajamas on backwards, offering to brush their teeth a second time. And once the light is off, “Papa, I have to potty.” No, bedtime routines cannot be standardized. They resist being made efficient.

In contrast, we think of seeing patients as a standardizable process; work to be optimized. This idea that work should be as efficient as possible came from the father of business management, Frederick Taylor. Taylor, a mechanical engineer, observed inefficiencies on the factory floor. His work was seminal in the development of the second industrial revolution. Before then no one had applied scientific rigor to productivity. His book, “The Principles of Scientific Management,” written in 1909, is considered the most influential management book of the 20th century. He was the first to use stopwatches to perform time studies, noting how long each task took with the belief that there was one best way. The worker was an extension of the machine, tuned by management such that he was as efficient as possible.

PublicDomain/commons.wikimedia.org/wiki/File:Ford_assembly_line_-_1913.jpg

A more insidious downside on the drive to efficiency lies in the nature of what we do. We aren’t factory workers punching out widgets, we’re physicians caring for people and people cannot be standardized. In this way, seeing patients is more like putting a toddler to bed than like assembling an iPhone. There will always be by-the-ways, basal cells hiding behind the ear, traffic jams, and bags of products that they want to review. Not sure how to use your fluorouracil? Let’s go over it again. Need to talk more about why you have granuloma annulare? Let me explain. Despite Taylor’s vision, some work simply cannot be optimized. And shouldn’t.

“Where’s my 11:30 patient who checked in half an hour ago?!” I asked my medical assistant. “Oh, she had to go to the bathroom.” Tap.
 

Dr. Benabio is director of Healthcare Transformation and chief of dermatology at Kaiser Permanente San Diego. The opinions expressed in this column are his own and do not represent those of Kaiser Permanente. Dr. Benabio is @Dermdoc on Twitter. Write to him at [email protected].

“We were all of us cogs in a great machine which sometimes rolled forward, nobody knew where, sometimes backwards, nobody knew why.” – Ernst Toller

A nice feature of the Apple watch is the stopwatch. With it, I can discreetly click the timer and watch seconds tick away. Tap. There’s one lap. Tap. Two. Tap. That was a quick visit, 6 minutes and 42 seconds. Tap. Under 2 minutes to close the chart. Let’s see if I can beat it. Tap. Tap. What if I moved my Mayo stand over to this side of the room? How about a sign, “All patients must have clothes off if you want a skin exam.” You think ob.gyns. are quick from skin to baby in a stat C-section? You should see how fast I can go from alcohol wipe to Drysol on a biopsy. Seconds. Tick, tick, tap.

Every day I look for ways to go faster. This is not so I can be out the door by 3. Rather, it’s simply to make it through the day without having to log on after we put the kids to bed at night.

Speaking of bedtimes, another nice feature of the Apple watch is the timer. With it, I can set a timer and a lovely chimey alarm will go off. This comes in handy with 3-year-olds. “Sloan, in two minutes we are going to brush your teeth.” Ding. “Sloan, you have one minute to get your pajamas on.” Ding. “Sloanie, I’ll give you 3 more minutes to put the kitties away, then get into bed.” Ding, ding, ding ...

As you can see, using the stopwatch to time a bedtime routine would be demoralizing. If you’ve tried to put a toddler to bed in summer you know. They explore every option to avoid sleeping: one more book (that would make 3), “accidentally” putting their pajamas on backwards, offering to brush their teeth a second time. And once the light is off, “Papa, I have to potty.” No, bedtime routines cannot be standardized. They resist being made efficient.

In contrast, we think of seeing patients as a standardizable process; work to be optimized. This idea that work should be as efficient as possible came from the father of business management, Frederick Taylor. Taylor, a mechanical engineer, observed inefficiencies on the factory floor. His work was seminal in the development of the second industrial revolution. Before then no one had applied scientific rigor to productivity. His book, “The Principles of Scientific Management,” written in 1909, is considered the most influential management book of the 20th century. He was the first to use stopwatches to perform time studies, noting how long each task took with the belief that there was one best way. The worker was an extension of the machine, tuned by management such that he was as efficient as possible.

PublicDomain/commons.wikimedia.org/wiki/File:Ford_assembly_line_-_1913.jpg

A more insidious downside on the drive to efficiency lies in the nature of what we do. We aren’t factory workers punching out widgets, we’re physicians caring for people and people cannot be standardized. In this way, seeing patients is more like putting a toddler to bed than like assembling an iPhone. There will always be by-the-ways, basal cells hiding behind the ear, traffic jams, and bags of products that they want to review. Not sure how to use your fluorouracil? Let’s go over it again. Need to talk more about why you have granuloma annulare? Let me explain. Despite Taylor’s vision, some work simply cannot be optimized. And shouldn’t.

“Where’s my 11:30 patient who checked in half an hour ago?!” I asked my medical assistant. “Oh, she had to go to the bathroom.” Tap.
 

Dr. Benabio is director of Healthcare Transformation and chief of dermatology at Kaiser Permanente San Diego. The opinions expressed in this column are his own and do not represent those of Kaiser Permanente. Dr. Benabio is @Dermdoc on Twitter. Write to him at [email protected].

Even at an advanced age, superagers have the memory of someone 20 or 30 years their junior. But why is that? A new study shows that, in superagers, age-related atrophy of the gray matter, especially in the areas responsible for memory, develops much more slowly than in normal older adults. However, the study also emphasizes the importance of physical and mental fitness for a healthy aging process.

“One of the most important unanswered questions with regard to superagers is: ‘Are they resistant to age-related memory loss, or do they have coping mechanisms that allow them to better offset this memory loss?’ ” wrote Marta Garo-Pascual, a PhD candidate at the Autonomous University of Madrid, Spain, and colleagues in the Lancet Healthy Longevity. “Our results indicate that superagers are resistant to these processes.”
 

Six years’ monitoring

From a cohort of older adults who had participated in a study aiming to identify early indicators of Alzheimer’s disease, the research group chose 64 superagers and 55 normal senior citizens. The latter served as the control group. While the superagers performed just as well in a memory test as people 30 years their junior, the control group’s performance was in line with their age and level of education.

All study participants were over age 79 years. Both the group of superagers and the control group included more females than males. On average, they were monitored for 6 years. During this period, a checkup was scheduled annually with an MRI examination, clinical tests, blood tests, and documentation of lifestyle factors.

For Alessandro Cellerino, PhD, of the Leibniz Institute on Aging–Fritz Lipmann Institute in Jena, Germany, this is the most crucial aspect of the study. “Even before this study, we knew that superagers demonstrated less atrophy in certain areas of the brain, but this was always only ever based on a single measurement.”
 

Memory centers protected

The MRI examinations confirmed that in superagers, gray matter atrophy in the regions responsible for memory (such as the medial temporal lobe and cholinergic forebrain), as well in regions important for movement (such as the motor thalamus), was less pronounced. In addition, the volume of gray matter in these regions, especially in the medial temporal lobe, decreased much more slowly in the superagers than in the control subjects over the study period.

Ms. Garo-Pascual and associates used a machine-learning algorithm to differentiate between superagers and normal older adults. From the 89 demographic, lifestyle, and clinical factors entered into the algorithm, two were the most important for the classification: the ability to move and mental health.
 

Mobility and mental health

Clinical tests such as the Timed Up-and-Go Test and the Finger Tapping Test revealed that superagers can be distinguished from the normally aging control subjects with regard to their mobility and fine motor skills. Their physical condition was better, although they, by their own admission, did not move any more than the control subjects in day-to-day life. According to Dr. Cellerino, this finding confirms that physical activity is paramount for cognitive function. “These people were over 80 years old – the fact that there was not much difference between their levels of activity is not surprising. Much more relevant is the question of how you get there – i.e., how active you are at the ages of 40, 50 or even 60 years old.”

Remaining active is important

As a matter of fact, the superagers indicated that generally they had been more active than the control subjects during their middle years. “Attempting to stay physically fit is essential; even if it just means going for a walk or taking the stairs,” said Dr. Cellerino.

On average, the superagers also fared much better in tests on physical health than the control subjects. They suffered significantly less from depression or anxiety disorders. “Earlier studies suggest that depression and anxiety disorders may influence performance in memory tests across all ages and that they are risk factors for developing dementia,” said Dr. Cellerino.

To avoid mental health issues in later life, gerontologist Dr. Cellerino recommended remaining socially engaged and involved. “Depression and anxiety are commonly also a consequence of social isolation,” he said.
 

Potential genetic differences

Blood sample analyses demonstrated that the superagers exhibited lower concentrations of biomarkers for neurodegenerative diseases than the control group did. In contrast, there was no difference between the two groups in the prevalence of the apo e4 allele, one of the most important genetic risk factors for Alzheimer’s disease. Nevertheless, Ms. Garo-Pascual and associates assume that genetics also play a role. They found that, despite 89 variables employed, the algorithm used could only distinguish superagers from normal older adults 66% of the time. This suggests that additional factors must be in play, such as genetic differences.

Body and mind

Since this is an observational study, whether the determined factors have a direct effect on superaging cannot be ascertained, the authors wrote. However, the results are consistent with earlier findings.

“Regarding the management of old age, we actually haven’t learned anything more than what we already knew. But it does confirm that physical and mental function are closely entwined and that we must maintain both to age healthily,” Dr. Cellerino concluded.

This article was translated from the Medscape German Edition. A version appeared on Medscape.com.

Even at an advanced age, superagers have the memory of someone 20 or 30 years their junior. But why is that? A new study shows that, in superagers, age-related atrophy of the gray matter, especially in the areas responsible for memory, develops much more slowly than in normal older adults. However, the study also emphasizes the importance of physical and mental fitness for a healthy aging process.

“One of the most important unanswered questions with regard to superagers is: ‘Are they resistant to age-related memory loss, or do they have coping mechanisms that allow them to better offset this memory loss?’ ” wrote Marta Garo-Pascual, a PhD candidate at the Autonomous University of Madrid, Spain, and colleagues in the Lancet Healthy Longevity. “Our results indicate that superagers are resistant to these processes.”
 

Six years’ monitoring

From a cohort of older adults who had participated in a study aiming to identify early indicators of Alzheimer’s disease, the research group chose 64 superagers and 55 normal senior citizens. The latter served as the control group. While the superagers performed just as well in a memory test as people 30 years their junior, the control group’s performance was in line with their age and level of education.

All study participants were over age 79 years. Both the group of superagers and the control group included more females than males. On average, they were monitored for 6 years. During this period, a checkup was scheduled annually with an MRI examination, clinical tests, blood tests, and documentation of lifestyle factors.

For Alessandro Cellerino, PhD, of the Leibniz Institute on Aging–Fritz Lipmann Institute in Jena, Germany, this is the most crucial aspect of the study. “Even before this study, we knew that superagers demonstrated less atrophy in certain areas of the brain, but this was always only ever based on a single measurement.”
 

Memory centers protected

The MRI examinations confirmed that in superagers, gray matter atrophy in the regions responsible for memory (such as the medial temporal lobe and cholinergic forebrain), as well in regions important for movement (such as the motor thalamus), was less pronounced. In addition, the volume of gray matter in these regions, especially in the medial temporal lobe, decreased much more slowly in the superagers than in the control subjects over the study period.

Ms. Garo-Pascual and associates used a machine-learning algorithm to differentiate between superagers and normal older adults. From the 89 demographic, lifestyle, and clinical factors entered into the algorithm, two were the most important for the classification: the ability to move and mental health.
 

Mobility and mental health

Clinical tests such as the Timed Up-and-Go Test and the Finger Tapping Test revealed that superagers can be distinguished from the normally aging control subjects with regard to their mobility and fine motor skills. Their physical condition was better, although they, by their own admission, did not move any more than the control subjects in day-to-day life. According to Dr. Cellerino, this finding confirms that physical activity is paramount for cognitive function. “These people were over 80 years old – the fact that there was not much difference between their levels of activity is not surprising. Much more relevant is the question of how you get there – i.e., how active you are at the ages of 40, 50 or even 60 years old.”

Remaining active is important

As a matter of fact, the superagers indicated that generally they had been more active than the control subjects during their middle years. “Attempting to stay physically fit is essential; even if it just means going for a walk or taking the stairs,” said Dr. Cellerino.

On average, the superagers also fared much better in tests on physical health than the control subjects. They suffered significantly less from depression or anxiety disorders. “Earlier studies suggest that depression and anxiety disorders may influence performance in memory tests across all ages and that they are risk factors for developing dementia,” said Dr. Cellerino.

To avoid mental health issues in later life, gerontologist Dr. Cellerino recommended remaining socially engaged and involved. “Depression and anxiety are commonly also a consequence of social isolation,” he said.
 

Potential genetic differences

Blood sample analyses demonstrated that the superagers exhibited lower concentrations of biomarkers for neurodegenerative diseases than the control group did. In contrast, there was no difference between the two groups in the prevalence of the apo e4 allele, one of the most important genetic risk factors for Alzheimer’s disease. Nevertheless, Ms. Garo-Pascual and associates assume that genetics also play a role. They found that, despite 89 variables employed, the algorithm used could only distinguish superagers from normal older adults 66% of the time. This suggests that additional factors must be in play, such as genetic differences.

Body and mind

Since this is an observational study, whether the determined factors have a direct effect on superaging cannot be ascertained, the authors wrote. However, the results are consistent with earlier findings.

“Regarding the management of old age, we actually haven’t learned anything more than what we already knew. But it does confirm that physical and mental function are closely entwined and that we must maintain both to age healthily,” Dr. Cellerino concluded.

This article was translated from the Medscape German Edition. A version appeared on Medscape.com.

Even at an advanced age, superagers have the memory of someone 20 or 30 years their junior. But why is that? A new study shows that, in superagers, age-related atrophy of the gray matter, especially in the areas responsible for memory, develops much more slowly than in normal older adults. However, the study also emphasizes the importance of physical and mental fitness for a healthy aging process.

“One of the most important unanswered questions with regard to superagers is: ‘Are they resistant to age-related memory loss, or do they have coping mechanisms that allow them to better offset this memory loss?’ ” wrote Marta Garo-Pascual, a PhD candidate at the Autonomous University of Madrid, Spain, and colleagues in the Lancet Healthy Longevity. “Our results indicate that superagers are resistant to these processes.”
 

Six years’ monitoring

From a cohort of older adults who had participated in a study aiming to identify early indicators of Alzheimer’s disease, the research group chose 64 superagers and 55 normal senior citizens. The latter served as the control group. While the superagers performed just as well in a memory test as people 30 years their junior, the control group’s performance was in line with their age and level of education.

All study participants were over age 79 years. Both the group of superagers and the control group included more females than males. On average, they were monitored for 6 years. During this period, a checkup was scheduled annually with an MRI examination, clinical tests, blood tests, and documentation of lifestyle factors.

For Alessandro Cellerino, PhD, of the Leibniz Institute on Aging–Fritz Lipmann Institute in Jena, Germany, this is the most crucial aspect of the study. “Even before this study, we knew that superagers demonstrated less atrophy in certain areas of the brain, but this was always only ever based on a single measurement.”
 

Memory centers protected

The MRI examinations confirmed that in superagers, gray matter atrophy in the regions responsible for memory (such as the medial temporal lobe and cholinergic forebrain), as well in regions important for movement (such as the motor thalamus), was less pronounced. In addition, the volume of gray matter in these regions, especially in the medial temporal lobe, decreased much more slowly in the superagers than in the control subjects over the study period.

Ms. Garo-Pascual and associates used a machine-learning algorithm to differentiate between superagers and normal older adults. From the 89 demographic, lifestyle, and clinical factors entered into the algorithm, two were the most important for the classification: the ability to move and mental health.
 

Mobility and mental health

Clinical tests such as the Timed Up-and-Go Test and the Finger Tapping Test revealed that superagers can be distinguished from the normally aging control subjects with regard to their mobility and fine motor skills. Their physical condition was better, although they, by their own admission, did not move any more than the control subjects in day-to-day life. According to Dr. Cellerino, this finding confirms that physical activity is paramount for cognitive function. “These people were over 80 years old – the fact that there was not much difference between their levels of activity is not surprising. Much more relevant is the question of how you get there – i.e., how active you are at the ages of 40, 50 or even 60 years old.”

Remaining active is important

As a matter of fact, the superagers indicated that generally they had been more active than the control subjects during their middle years. “Attempting to stay physically fit is essential; even if it just means going for a walk or taking the stairs,” said Dr. Cellerino.

On average, the superagers also fared much better in tests on physical health than the control subjects. They suffered significantly less from depression or anxiety disorders. “Earlier studies suggest that depression and anxiety disorders may influence performance in memory tests across all ages and that they are risk factors for developing dementia,” said Dr. Cellerino.

To avoid mental health issues in later life, gerontologist Dr. Cellerino recommended remaining socially engaged and involved. “Depression and anxiety are commonly also a consequence of social isolation,” he said.
 

Potential genetic differences

Blood sample analyses demonstrated that the superagers exhibited lower concentrations of biomarkers for neurodegenerative diseases than the control group did. In contrast, there was no difference between the two groups in the prevalence of the apo e4 allele, one of the most important genetic risk factors for Alzheimer’s disease. Nevertheless, Ms. Garo-Pascual and associates assume that genetics also play a role. They found that, despite 89 variables employed, the algorithm used could only distinguish superagers from normal older adults 66% of the time. This suggests that additional factors must be in play, such as genetic differences.

Body and mind

Since this is an observational study, whether the determined factors have a direct effect on superaging cannot be ascertained, the authors wrote. However, the results are consistent with earlier findings.

“Regarding the management of old age, we actually haven’t learned anything more than what we already knew. But it does confirm that physical and mental function are closely entwined and that we must maintain both to age healthily,” Dr. Cellerino concluded.

This article was translated from the Medscape German Edition. A version appeared on Medscape.com.

Physicians tend to be compulsive multitaskers. We switch from one task to another all the time – even in front of patients. We think we are more efficient and productive, and that we are accomplishing more in less time. In fact, there is no credible evidence that this is true, and a mountain of evidence showing exactly the opposite.

According to this study and others, multitasking results in an average of 2 hours per day of lost productivity. It decreases the quality of work performed and increases cortisol levels, which impedes cognitive functioning, leading to a further decrease in productivity in a vicious cycle, making you increasingly ineffective and destroying your motivation and mood.

On the surface, the reasons for this are not intuitively obvious. After all, simple and routine tasks are easy to perform simultaneously; we can all walk and chew gum at the same time or eat a snack while watching TV. The problems arise when we try to multitask more complex tasks that require thought and decision-making.

It turns out that the pressures of our modern world have evolved faster than our brains. We are still hard-wired for monotasking. When we think we are completing two tasks simultaneously, we are actually performing individual actions in rapid succession. Each time you switch tasks, your brain must turn off the cognitive rules of the previous task and turn on new rules for the next one. When you switch back, the process repeats in reverse. Each of those mental gear shifts takes time and costs us productivity. According to one psychologist, even brief mental blocks created by shifting between tasks can cost as much as 40% of someone’s productive time. We are also far more likely to make mistakes while we are doing it.

Furthermore, you are stifling your creativity and innovation because you don’t focus on one task long enough to come up with original insights. Multitasking also slows down your general cognitive functions, in the same way that keeping many windows are open on your computer slows down the entire system. A study from my alma mater, the University of California, San Francisco, concluded that multitasking negativity affects memory in both younger and older adults (although the effects were greater in older adults) .

So, what to do? The fact remains that, all too often, there really are too many tasks and not enough hours in the day. How can you get through them without falling into the multitasking trap?

The first rule is to prioritize. In his book “The Seven Habits of Highly Effective People,” Stephen Covey makes an important distinction between tasks that are important and those that are merely urgent. Tasks that are important and urgent tend to make time for themselves, because they must be taken care of immediately.

Jobs that are important but not urgent are the ones we tend to try to multitask. Because there is no immediate deadline, we think we can do two or more of them simultaneously, or we fall into the other major productivity trap: procrastination. Neither of those strategies tends to end well. Identify those important but not urgent tasks and force yourself to go through them one by one.

Urgent but unimportant tasks are the productivity thieves. They demand your attention but are not worthy of it. Most tasks in this category can be delegated. I have written about physicians’ workaholic and perfectionist tendencies that drive our conviction that no one else can do anything as well as we can. Does that unimportant task, even if urgent, really demand your time, skills, education, and medical license? Is there someone in your office, or possibly an outside contractor, who could do it just as well, and maybe faster?

In fact, that is the question you should ask every time a project triggers your urge to multitask: “Who could be doing this job – or at least a major part of it – instead of me?”

If your multitasking urges are deeply ingrained – particularly those that involve phones, laptops, and the cloud – you might consider employing electronic aids. SelfControl, for example, is a free, open-sourced app that lets you block your own access to distracting websites, your email servers, social media, or anything else on the Internet. You list the sites you wish to block and set a period of time to block them. Until the set time expires, you will be unable to access those sites, even if you restart your computer or delete the application.

Dr. Eastern practices dermatology and dermatologic surgery in Belleville, N.J. He is the author of numerous articles and textbook chapters, and is a longtime monthly columnist for Dermatology News. Write to him at [email protected].

Physicians tend to be compulsive multitaskers. We switch from one task to another all the time – even in front of patients. We think we are more efficient and productive, and that we are accomplishing more in less time. In fact, there is no credible evidence that this is true, and a mountain of evidence showing exactly the opposite.

According to this study and others, multitasking results in an average of 2 hours per day of lost productivity. It decreases the quality of work performed and increases cortisol levels, which impedes cognitive functioning, leading to a further decrease in productivity in a vicious cycle, making you increasingly ineffective and destroying your motivation and mood.

On the surface, the reasons for this are not intuitively obvious. After all, simple and routine tasks are easy to perform simultaneously; we can all walk and chew gum at the same time or eat a snack while watching TV. The problems arise when we try to multitask more complex tasks that require thought and decision-making.

It turns out that the pressures of our modern world have evolved faster than our brains. We are still hard-wired for monotasking. When we think we are completing two tasks simultaneously, we are actually performing individual actions in rapid succession. Each time you switch tasks, your brain must turn off the cognitive rules of the previous task and turn on new rules for the next one. When you switch back, the process repeats in reverse. Each of those mental gear shifts takes time and costs us productivity. According to one psychologist, even brief mental blocks created by shifting between tasks can cost as much as 40% of someone’s productive time. We are also far more likely to make mistakes while we are doing it.

Furthermore, you are stifling your creativity and innovation because you don’t focus on one task long enough to come up with original insights. Multitasking also slows down your general cognitive functions, in the same way that keeping many windows are open on your computer slows down the entire system. A study from my alma mater, the University of California, San Francisco, concluded that multitasking negativity affects memory in both younger and older adults (although the effects were greater in older adults) .

So, what to do? The fact remains that, all too often, there really are too many tasks and not enough hours in the day. How can you get through them without falling into the multitasking trap?

The first rule is to prioritize. In his book “The Seven Habits of Highly Effective People,” Stephen Covey makes an important distinction between tasks that are important and those that are merely urgent. Tasks that are important and urgent tend to make time for themselves, because they must be taken care of immediately.

Jobs that are important but not urgent are the ones we tend to try to multitask. Because there is no immediate deadline, we think we can do two or more of them simultaneously, or we fall into the other major productivity trap: procrastination. Neither of those strategies tends to end well. Identify those important but not urgent tasks and force yourself to go through them one by one.

Urgent but unimportant tasks are the productivity thieves. They demand your attention but are not worthy of it. Most tasks in this category can be delegated. I have written about physicians’ workaholic and perfectionist tendencies that drive our conviction that no one else can do anything as well as we can. Does that unimportant task, even if urgent, really demand your time, skills, education, and medical license? Is there someone in your office, or possibly an outside contractor, who could do it just as well, and maybe faster?

In fact, that is the question you should ask every time a project triggers your urge to multitask: “Who could be doing this job – or at least a major part of it – instead of me?”

If your multitasking urges are deeply ingrained – particularly those that involve phones, laptops, and the cloud – you might consider employing electronic aids. SelfControl, for example, is a free, open-sourced app that lets you block your own access to distracting websites, your email servers, social media, or anything else on the Internet. You list the sites you wish to block and set a period of time to block them. Until the set time expires, you will be unable to access those sites, even if you restart your computer or delete the application.

Dr. Eastern practices dermatology and dermatologic surgery in Belleville, N.J. He is the author of numerous articles and textbook chapters, and is a longtime monthly columnist for Dermatology News. Write to him at [email protected].

Physicians tend to be compulsive multitaskers. We switch from one task to another all the time – even in front of patients. We think we are more efficient and productive, and that we are accomplishing more in less time. In fact, there is no credible evidence that this is true, and a mountain of evidence showing exactly the opposite.

According to this study and others, multitasking results in an average of 2 hours per day of lost productivity. It decreases the quality of work performed and increases cortisol levels, which impedes cognitive functioning, leading to a further decrease in productivity in a vicious cycle, making you increasingly ineffective and destroying your motivation and mood.

On the surface, the reasons for this are not intuitively obvious. After all, simple and routine tasks are easy to perform simultaneously; we can all walk and chew gum at the same time or eat a snack while watching TV. The problems arise when we try to multitask more complex tasks that require thought and decision-making.

It turns out that the pressures of our modern world have evolved faster than our brains. We are still hard-wired for monotasking. When we think we are completing two tasks simultaneously, we are actually performing individual actions in rapid succession. Each time you switch tasks, your brain must turn off the cognitive rules of the previous task and turn on new rules for the next one. When you switch back, the process repeats in reverse. Each of those mental gear shifts takes time and costs us productivity. According to one psychologist, even brief mental blocks created by shifting between tasks can cost as much as 40% of someone’s productive time. We are also far more likely to make mistakes while we are doing it.

Furthermore, you are stifling your creativity and innovation because you don’t focus on one task long enough to come up with original insights. Multitasking also slows down your general cognitive functions, in the same way that keeping many windows are open on your computer slows down the entire system. A study from my alma mater, the University of California, San Francisco, concluded that multitasking negativity affects memory in both younger and older adults (although the effects were greater in older adults) .

So, what to do? The fact remains that, all too often, there really are too many tasks and not enough hours in the day. How can you get through them without falling into the multitasking trap?

The first rule is to prioritize. In his book “The Seven Habits of Highly Effective People,” Stephen Covey makes an important distinction between tasks that are important and those that are merely urgent. Tasks that are important and urgent tend to make time for themselves, because they must be taken care of immediately.

Jobs that are important but not urgent are the ones we tend to try to multitask. Because there is no immediate deadline, we think we can do two or more of them simultaneously, or we fall into the other major productivity trap: procrastination. Neither of those strategies tends to end well. Identify those important but not urgent tasks and force yourself to go through them one by one.

Urgent but unimportant tasks are the productivity thieves. They demand your attention but are not worthy of it. Most tasks in this category can be delegated. I have written about physicians’ workaholic and perfectionist tendencies that drive our conviction that no one else can do anything as well as we can. Does that unimportant task, even if urgent, really demand your time, skills, education, and medical license? Is there someone in your office, or possibly an outside contractor, who could do it just as well, and maybe faster?

In fact, that is the question you should ask every time a project triggers your urge to multitask: “Who could be doing this job – or at least a major part of it – instead of me?”

If your multitasking urges are deeply ingrained – particularly those that involve phones, laptops, and the cloud – you might consider employing electronic aids. SelfControl, for example, is a free, open-sourced app that lets you block your own access to distracting websites, your email servers, social media, or anything else on the Internet. You list the sites you wish to block and set a period of time to block them. Until the set time expires, you will be unable to access those sites, even if you restart your computer or delete the application.

Dr. Eastern practices dermatology and dermatologic surgery in Belleville, N.J. He is the author of numerous articles and textbook chapters, and is a longtime monthly columnist for Dermatology News. Write to him at [email protected].

Several signs are pointing to an impending surge in the number of human cases of West Nile virus in several regions of the United States.

West Nile virus is spread by infected mosquitoes and currently there is no cure or virus-specific treatment. In rare cases, it can be deadly. It can infect humans, birds, horses, and other mammals.

West Nile Virus is the leading cause of mosquito-borne disease in the continental United States. As of Aug. 8, 126 human cases had been identified across 22 states, according to the Centers for Disease Control and Prevention.

“Particularly here in California, it’s peak risk right now,” said Vicki Kramer, PhD, chief of vector-borne diseases in the California Department of Public Health. She said scientists there are seeing higher mosquito and infected mosquito numbers.
 

“Peak risk right now”

Dead birds are tested for the virus and by Aug. 4, 181 of the 913 birds tested in California have been positive, three times the total testing positive by this time in 2022.

“Last year at this time, we had 60 positive dead birds out of 817 tested,” Dr. Kramer said.

Severe flooding and high heat can contribute to the rise in mosquito populations and many parts of the country have seen plenty of both.

One of the ways scientists track infected mosquito patterns in California is by using flocks of strategically placed sentinel chickens.

“Chickens are a mosquito magnet,” Dr. Kramer said.

Chickens don’t get sick with the virus, but they do build antibodies to it. Surveillance teams check their blood every other week to track the virus.

Daniel Pastula, MD, MHS, chief of neuroinfectious diseases and global neurology at the University of Colorado School of Medicine and the Colorado School of Public Health, said the state is watching troubling signs as well.

“The concern this year,” Dr. Pastula said, “particularly along the Front Range in Colorado, is we’ve found many more mosquitoes [that are] positive for West Nile earlier in the season compared with other years.

“We’re bracing for higher-than-baseline human cases,” he said.

Asked about this year’s first human case, reported in Toronto, a region with a long winter and low incidence of the virus, he said that provides a further example that people need to be prepared even in climates not known to be mosquito-dense.

He added, however, that climate is only one factor in the severity of the season. Others include birds’ immunity and migratory patterns.

Dr. Pastula said that fluctuations in temperature and rainfall are rising with climate change and are disrupting normal baseline levels of West Nile.

“That shows we need to be prepared for West Nile virus and other mosquito-borne diseases in any place in North America or really the world. We recently saw malaria cases in the southern United States. It just shows you how dangerous mosquitoes can be.”
 

Avoid mosquito bites

Dr. Pastula and Dr. Kramer list the precautions people can take to protect themselves from West Nile virus:

• Limit outdoor exposure particularly at dusk and dawn.
• Wear protective clothing.
• Use .
• Repair window screens so mosquitoes cannot fly through.
• Dump and drain standing water on your property and maintain swimming pools.

Dr. Pastula noted that summer is the time human cases start to mount – typically from July and August to the first hard freeze.

“We have been warning people here up and down the Front Range of Colorado to take prevention very seriously,” Dr. Pastula said.

He pointed out that 80% who are infected with West Nile will have no symptoms.

About 20% will have flu-like illness – high fever, body and joint aches, rash, diarrhea, or headaches. Symptoms may last for weeks. About 1% of the time, he said, people can get neuroinvasive West Nile.

Dr. Pastula explained that the virus can infect the covering of the brain and spinal cord causing meningitis with very high fever, severe headaches, stiff neck, and sensitivity to light.

So far this year, there have been 89 neuroinvasive cases reported nationally, according to the CDC.

With West Nile encephalitis, the virus “can infect the brain itself causing altered mental status, movement disorders, or weakness,” Dr. Pastula said.

Sometimes it can infect the gray matter of the spinal cord causing a West Nile virus poliomyelitis, which brings polio-like symptoms.

“The West Nile encephalitis and poliomyelitis can cause permanent deficits or even death,” he said. “It’s uncommon but it’s not trivial.”

Several vaccine candidates are in development, Dr. Pastula said, but none has reached clinical trials. Part of the reason for that, he said, is that scientists must be able to predict the timing of an outbreak.

“We’re not really great at predicting outbreaks,” he said.

Although the risk for neuroinvasive disease is small, it can be higher in certain groups, he said – those who are over age 60 years or are immunocompromised; those who have diabetes, cancer, or kidney disease; or those who have undergone organ transplants.

Those infected should see a health care professional and may be able to get relief with the usual medications for flu-like illness.

Some with severe infection may need to go to the hospital, Dr. Pastula said.
 

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

Several signs are pointing to an impending surge in the number of human cases of West Nile virus in several regions of the United States.

West Nile virus is spread by infected mosquitoes and currently there is no cure or virus-specific treatment. In rare cases, it can be deadly. It can infect humans, birds, horses, and other mammals.

West Nile Virus is the leading cause of mosquito-borne disease in the continental United States. As of Aug. 8, 126 human cases had been identified across 22 states, according to the Centers for Disease Control and Prevention.

“Particularly here in California, it’s peak risk right now,” said Vicki Kramer, PhD, chief of vector-borne diseases in the California Department of Public Health. She said scientists there are seeing higher mosquito and infected mosquito numbers.
 

“Peak risk right now”

Dead birds are tested for the virus and by Aug. 4, 181 of the 913 birds tested in California have been positive, three times the total testing positive by this time in 2022.

“Last year at this time, we had 60 positive dead birds out of 817 tested,” Dr. Kramer said.

Severe flooding and high heat can contribute to the rise in mosquito populations and many parts of the country have seen plenty of both.

One of the ways scientists track infected mosquito patterns in California is by using flocks of strategically placed sentinel chickens.

“Chickens are a mosquito magnet,” Dr. Kramer said.

Chickens don’t get sick with the virus, but they do build antibodies to it. Surveillance teams check their blood every other week to track the virus.

Daniel Pastula, MD, MHS, chief of neuroinfectious diseases and global neurology at the University of Colorado School of Medicine and the Colorado School of Public Health, said the state is watching troubling signs as well.

“The concern this year,” Dr. Pastula said, “particularly along the Front Range in Colorado, is we’ve found many more mosquitoes [that are] positive for West Nile earlier in the season compared with other years.

“We’re bracing for higher-than-baseline human cases,” he said.

Asked about this year’s first human case, reported in Toronto, a region with a long winter and low incidence of the virus, he said that provides a further example that people need to be prepared even in climates not known to be mosquito-dense.

He added, however, that climate is only one factor in the severity of the season. Others include birds’ immunity and migratory patterns.

Dr. Pastula said that fluctuations in temperature and rainfall are rising with climate change and are disrupting normal baseline levels of West Nile.

“That shows we need to be prepared for West Nile virus and other mosquito-borne diseases in any place in North America or really the world. We recently saw malaria cases in the southern United States. It just shows you how dangerous mosquitoes can be.”
 

Avoid mosquito bites

Dr. Pastula and Dr. Kramer list the precautions people can take to protect themselves from West Nile virus:

• Limit outdoor exposure particularly at dusk and dawn.
• Wear protective clothing.
• Use .
• Repair window screens so mosquitoes cannot fly through.
• Dump and drain standing water on your property and maintain swimming pools.

Dr. Pastula noted that summer is the time human cases start to mount – typically from July and August to the first hard freeze.

“We have been warning people here up and down the Front Range of Colorado to take prevention very seriously,” Dr. Pastula said.

He pointed out that 80% who are infected with West Nile will have no symptoms.

About 20% will have flu-like illness – high fever, body and joint aches, rash, diarrhea, or headaches. Symptoms may last for weeks. About 1% of the time, he said, people can get neuroinvasive West Nile.

Dr. Pastula explained that the virus can infect the covering of the brain and spinal cord causing meningitis with very high fever, severe headaches, stiff neck, and sensitivity to light.

So far this year, there have been 89 neuroinvasive cases reported nationally, according to the CDC.

With West Nile encephalitis, the virus “can infect the brain itself causing altered mental status, movement disorders, or weakness,” Dr. Pastula said.

Sometimes it can infect the gray matter of the spinal cord causing a West Nile virus poliomyelitis, which brings polio-like symptoms.

“The West Nile encephalitis and poliomyelitis can cause permanent deficits or even death,” he said. “It’s uncommon but it’s not trivial.”

Several vaccine candidates are in development, Dr. Pastula said, but none has reached clinical trials. Part of the reason for that, he said, is that scientists must be able to predict the timing of an outbreak.

“We’re not really great at predicting outbreaks,” he said.

Although the risk for neuroinvasive disease is small, it can be higher in certain groups, he said – those who are over age 60 years or are immunocompromised; those who have diabetes, cancer, or kidney disease; or those who have undergone organ transplants.

Those infected should see a health care professional and may be able to get relief with the usual medications for flu-like illness.

Some with severe infection may need to go to the hospital, Dr. Pastula said.
 

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

Several signs are pointing to an impending surge in the number of human cases of West Nile virus in several regions of the United States.

West Nile virus is spread by infected mosquitoes and currently there is no cure or virus-specific treatment. In rare cases, it can be deadly. It can infect humans, birds, horses, and other mammals.

West Nile Virus is the leading cause of mosquito-borne disease in the continental United States. As of Aug. 8, 126 human cases had been identified across 22 states, according to the Centers for Disease Control and Prevention.

“Particularly here in California, it’s peak risk right now,” said Vicki Kramer, PhD, chief of vector-borne diseases in the California Department of Public Health. She said scientists there are seeing higher mosquito and infected mosquito numbers.
 

“Peak risk right now”

Dead birds are tested for the virus and by Aug. 4, 181 of the 913 birds tested in California have been positive, three times the total testing positive by this time in 2022.

“Last year at this time, we had 60 positive dead birds out of 817 tested,” Dr. Kramer said.

Severe flooding and high heat can contribute to the rise in mosquito populations and many parts of the country have seen plenty of both.

One of the ways scientists track infected mosquito patterns in California is by using flocks of strategically placed sentinel chickens.

“Chickens are a mosquito magnet,” Dr. Kramer said.

Chickens don’t get sick with the virus, but they do build antibodies to it. Surveillance teams check their blood every other week to track the virus.

Daniel Pastula, MD, MHS, chief of neuroinfectious diseases and global neurology at the University of Colorado School of Medicine and the Colorado School of Public Health, said the state is watching troubling signs as well.

“The concern this year,” Dr. Pastula said, “particularly along the Front Range in Colorado, is we’ve found many more mosquitoes [that are] positive for West Nile earlier in the season compared with other years.

“We’re bracing for higher-than-baseline human cases,” he said.

Asked about this year’s first human case, reported in Toronto, a region with a long winter and low incidence of the virus, he said that provides a further example that people need to be prepared even in climates not known to be mosquito-dense.

He added, however, that climate is only one factor in the severity of the season. Others include birds’ immunity and migratory patterns.

Dr. Pastula said that fluctuations in temperature and rainfall are rising with climate change and are disrupting normal baseline levels of West Nile.

“That shows we need to be prepared for West Nile virus and other mosquito-borne diseases in any place in North America or really the world. We recently saw malaria cases in the southern United States. It just shows you how dangerous mosquitoes can be.”
 

Avoid mosquito bites

Dr. Pastula and Dr. Kramer list the precautions people can take to protect themselves from West Nile virus:

• Limit outdoor exposure particularly at dusk and dawn.
• Wear protective clothing.
• Use .
• Repair window screens so mosquitoes cannot fly through.
• Dump and drain standing water on your property and maintain swimming pools.

Dr. Pastula noted that summer is the time human cases start to mount – typically from July and August to the first hard freeze.

“We have been warning people here up and down the Front Range of Colorado to take prevention very seriously,” Dr. Pastula said.

He pointed out that 80% who are infected with West Nile will have no symptoms.

About 20% will have flu-like illness – high fever, body and joint aches, rash, diarrhea, or headaches. Symptoms may last for weeks. About 1% of the time, he said, people can get neuroinvasive West Nile.

Dr. Pastula explained that the virus can infect the covering of the brain and spinal cord causing meningitis with very high fever, severe headaches, stiff neck, and sensitivity to light.

So far this year, there have been 89 neuroinvasive cases reported nationally, according to the CDC.

With West Nile encephalitis, the virus “can infect the brain itself causing altered mental status, movement disorders, or weakness,” Dr. Pastula said.

Sometimes it can infect the gray matter of the spinal cord causing a West Nile virus poliomyelitis, which brings polio-like symptoms.

“The West Nile encephalitis and poliomyelitis can cause permanent deficits or even death,” he said. “It’s uncommon but it’s not trivial.”

Several vaccine candidates are in development, Dr. Pastula said, but none has reached clinical trials. Part of the reason for that, he said, is that scientists must be able to predict the timing of an outbreak.

“We’re not really great at predicting outbreaks,” he said.

Although the risk for neuroinvasive disease is small, it can be higher in certain groups, he said – those who are over age 60 years or are immunocompromised; those who have diabetes, cancer, or kidney disease; or those who have undergone organ transplants.

Those infected should see a health care professional and may be able to get relief with the usual medications for flu-like illness.

Some with severe infection may need to go to the hospital, Dr. Pastula said.
 

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

Among military veterans who die by suicide, those who experience a traumatic brain injury (TBI) during service take their lives 21% sooner after deployment than those without a TBI history, a new study shows.

Investigators also found that increases in new mental health diagnoses are significantly higher in soldiers with a history of TBI – in some cases, strikingly higher. For example, cases of substance use disorder rose by 100% among veterans with TBI compared to just 14.5% in those with no brain injury.

Veterans Health Administration

“We had had pieces of these findings for a long time but to be able to lay out this longitudinal story over time is the part that’s new and important to really switch the focus to people’s whole lives and things that happen over time, both psychological and physical,” lead author Lisa Brenner, PhD, director of the Veterans Health Administration (VHA) Rocky Mountain Mental Illness Research Education and Clinical Center, Aurora, Colo., said in an interview.

“If we take that life-course view, it’s a very different way about thinking about conceptualizing exposures and conceptualizing risk and it’s a different way of thinking about treatment and prevention,” added Dr. Brenner, professor of physical medicine and rehabilitation, psychiatry, and neurology at the University of Colorado, Aurora. “I think that definitely applies to civilian populations.”

The findings were published online in JAMA Network Open.
 

Largest, longest study to date

Researchers have long suspected that TBI and a higher rate of new mental illness and a shorter time to suicide are all somehow linked. But this study examined all three components longitudinally, in what is thought to be the largest and longest study on the topic to date, including more than 860,000 people who were followed for up to a decade.

Investigators studied health data from the Substance Use and Psychological Injury Combat Study database on 860,892 U.S. Army soldiers who returned from deployment in Iraq or Afghanistan between 2008 and 2014 and were 18-24 years old at the end of that deployment. They then examined new mental health diagnoses and suicide trends over time.

Nearly 109,000 (12.6%) experienced a TBI during deployment, and 2,695 had died by suicide through the end of 2018.

New-onset diagnoses of anxiety, mood disorders, posttraumatic stress disorder, alcohol use, and substance use disorder (SUD) after deployment were all more common in soldiers who experienced PTSD while serving compared with those with no history of TBI.

There was a 67.7% increase in mood disorders in participants with TBI compared with a 37.5% increase in those without TBI. The increase in new cases of alcohol use disorder was also greater in the TBI group (a 31.9% increase vs. a 10.3% increase).

But the sharpest difference was the increase in substance use disorder among those with TBI, which rose 100% compared with a 14.5% increase in solders with no history of TBI.
 

Sharp differences in time to suicide

Death by suicide was only slightly more common in those with TBI compared with those without (0.4% vs. 0.3%, respectively). But those with a brain injury committed suicide 21.3% sooner than did those without a head injury, after the researchers controlled for sex, age, race, ethnicity, and fiscal year of return from deployment.

Time to suicide was faster in those with a TBI and two or more new mental health diagnoses and fastest among those with TBI and a new SUD diagnosis, who took their own lives 62.8% faster than did those without a TBI.

The findings offer an important message to medical professionals in many different specialties, Dr. Brenner said.

“Folks in mental health probably have a lot of patients who have brain injury in their practice, and they don’t know it and that’s an important thing to know,” she said, adding that “neurologists should screen for depression and other mental health conditions and make sure those people have evidence-based treatments for those mental health conditions while they’re addressing the TBI-related symptoms.”
 

Applicable to civilians?

“The complex interplay between TBI, its potential effects on mental health, and risk of suicide remains a vexing focus of ongoing investigations and academic inquiry,” Ross Zafonte, DO, president of Spaulding Rehabilitation Hospital Network and professor and chair of physical medicine and rehabilitation at Harvard Medical School, Boston, and colleagues, wrote in an accompanying editorial.

The study builds on earlier work, they added, and praised the study’s longitudinal design and large cohort as key to the findings. The data on increased rates of new-onset substance use disorder, which was also associated with a faster time to suicide in the TBI group, were of particular interest.

“In this work, Brenner and colleagues identified substance use disorder as a key factor in faster time to suicide for active-duty service members with a history of TBI compared with those without TBI and theorized that a multiple stress or exposure burden may enhance risk,” they wrote. “This theory is reasonable and has been postulated among individuals with medical sequelae linked to TBI.”

However, the authors caution against applying these findings in military veterans to civilians.

“While this work is critical in the military population, caution should be given to avoid direct generalization to other populations, such as athletes, for whom the linkage to suicidal ideation is less understood,” they wrote.

The study was funded by National Institute of Mental Health and Office of the Director at National Institutes of Health. Dr. Brenner has received personal fees from Wolters Kluwer, Rand, American Psychological Association, and Oxford University Press and serves as a consultant to sports leagues via her university affiliation. Dr. Zafonte reported receiving royalties from Springer/Demos; serving as a member of the editorial boards of Journal of Neurotrauma and Frontiers in Neurology and scientific advisory boards of Myomo, Nanodiagnostics, Onecare.ai, and Kisbee; and evaluating patients in the MGH Brain and Body-TRUST Program, which is funded by the National Football League Players Association.
 

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

Among military veterans who die by suicide, those who experience a traumatic brain injury (TBI) during service take their lives 21% sooner after deployment than those without a TBI history, a new study shows.

Investigators also found that increases in new mental health diagnoses are significantly higher in soldiers with a history of TBI – in some cases, strikingly higher. For example, cases of substance use disorder rose by 100% among veterans with TBI compared to just 14.5% in those with no brain injury.

Veterans Health Administration

“We had had pieces of these findings for a long time but to be able to lay out this longitudinal story over time is the part that’s new and important to really switch the focus to people’s whole lives and things that happen over time, both psychological and physical,” lead author Lisa Brenner, PhD, director of the Veterans Health Administration (VHA) Rocky Mountain Mental Illness Research Education and Clinical Center, Aurora, Colo., said in an interview.

“If we take that life-course view, it’s a very different way about thinking about conceptualizing exposures and conceptualizing risk and it’s a different way of thinking about treatment and prevention,” added Dr. Brenner, professor of physical medicine and rehabilitation, psychiatry, and neurology at the University of Colorado, Aurora. “I think that definitely applies to civilian populations.”

The findings were published online in JAMA Network Open.
 

Largest, longest study to date

Researchers have long suspected that TBI and a higher rate of new mental illness and a shorter time to suicide are all somehow linked. But this study examined all three components longitudinally, in what is thought to be the largest and longest study on the topic to date, including more than 860,000 people who were followed for up to a decade.

Investigators studied health data from the Substance Use and Psychological Injury Combat Study database on 860,892 U.S. Army soldiers who returned from deployment in Iraq or Afghanistan between 2008 and 2014 and were 18-24 years old at the end of that deployment. They then examined new mental health diagnoses and suicide trends over time.

Nearly 109,000 (12.6%) experienced a TBI during deployment, and 2,695 had died by suicide through the end of 2018.

New-onset diagnoses of anxiety, mood disorders, posttraumatic stress disorder, alcohol use, and substance use disorder (SUD) after deployment were all more common in soldiers who experienced PTSD while serving compared with those with no history of TBI.

There was a 67.7% increase in mood disorders in participants with TBI compared with a 37.5% increase in those without TBI. The increase in new cases of alcohol use disorder was also greater in the TBI group (a 31.9% increase vs. a 10.3% increase).

But the sharpest difference was the increase in substance use disorder among those with TBI, which rose 100% compared with a 14.5% increase in solders with no history of TBI.
 

Sharp differences in time to suicide

Death by suicide was only slightly more common in those with TBI compared with those without (0.4% vs. 0.3%, respectively). But those with a brain injury committed suicide 21.3% sooner than did those without a head injury, after the researchers controlled for sex, age, race, ethnicity, and fiscal year of return from deployment.

Time to suicide was faster in those with a TBI and two or more new mental health diagnoses and fastest among those with TBI and a new SUD diagnosis, who took their own lives 62.8% faster than did those without a TBI.

The findings offer an important message to medical professionals in many different specialties, Dr. Brenner said.

“Folks in mental health probably have a lot of patients who have brain injury in their practice, and they don’t know it and that’s an important thing to know,” she said, adding that “neurologists should screen for depression and other mental health conditions and make sure those people have evidence-based treatments for those mental health conditions while they’re addressing the TBI-related symptoms.”
 

Applicable to civilians?

“The complex interplay between TBI, its potential effects on mental health, and risk of suicide remains a vexing focus of ongoing investigations and academic inquiry,” Ross Zafonte, DO, president of Spaulding Rehabilitation Hospital Network and professor and chair of physical medicine and rehabilitation at Harvard Medical School, Boston, and colleagues, wrote in an accompanying editorial.

The study builds on earlier work, they added, and praised the study’s longitudinal design and large cohort as key to the findings. The data on increased rates of new-onset substance use disorder, which was also associated with a faster time to suicide in the TBI group, were of particular interest.

“In this work, Brenner and colleagues identified substance use disorder as a key factor in faster time to suicide for active-duty service members with a history of TBI compared with those without TBI and theorized that a multiple stress or exposure burden may enhance risk,” they wrote. “This theory is reasonable and has been postulated among individuals with medical sequelae linked to TBI.”

However, the authors caution against applying these findings in military veterans to civilians.

“While this work is critical in the military population, caution should be given to avoid direct generalization to other populations, such as athletes, for whom the linkage to suicidal ideation is less understood,” they wrote.

The study was funded by National Institute of Mental Health and Office of the Director at National Institutes of Health. Dr. Brenner has received personal fees from Wolters Kluwer, Rand, American Psychological Association, and Oxford University Press and serves as a consultant to sports leagues via her university affiliation. Dr. Zafonte reported receiving royalties from Springer/Demos; serving as a member of the editorial boards of Journal of Neurotrauma and Frontiers in Neurology and scientific advisory boards of Myomo, Nanodiagnostics, Onecare.ai, and Kisbee; and evaluating patients in the MGH Brain and Body-TRUST Program, which is funded by the National Football League Players Association.
 

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

Among military veterans who die by suicide, those who experience a traumatic brain injury (TBI) during service take their lives 21% sooner after deployment than those without a TBI history, a new study shows.

Investigators also found that increases in new mental health diagnoses are significantly higher in soldiers with a history of TBI – in some cases, strikingly higher. For example, cases of substance use disorder rose by 100% among veterans with TBI compared to just 14.5% in those with no brain injury.

Veterans Health Administration

“We had had pieces of these findings for a long time but to be able to lay out this longitudinal story over time is the part that’s new and important to really switch the focus to people’s whole lives and things that happen over time, both psychological and physical,” lead author Lisa Brenner, PhD, director of the Veterans Health Administration (VHA) Rocky Mountain Mental Illness Research Education and Clinical Center, Aurora, Colo., said in an interview.

“If we take that life-course view, it’s a very different way about thinking about conceptualizing exposures and conceptualizing risk and it’s a different way of thinking about treatment and prevention,” added Dr. Brenner, professor of physical medicine and rehabilitation, psychiatry, and neurology at the University of Colorado, Aurora. “I think that definitely applies to civilian populations.”

The findings were published online in JAMA Network Open.
 

Largest, longest study to date

Researchers have long suspected that TBI and a higher rate of new mental illness and a shorter time to suicide are all somehow linked. But this study examined all three components longitudinally, in what is thought to be the largest and longest study on the topic to date, including more than 860,000 people who were followed for up to a decade.

Investigators studied health data from the Substance Use and Psychological Injury Combat Study database on 860,892 U.S. Army soldiers who returned from deployment in Iraq or Afghanistan between 2008 and 2014 and were 18-24 years old at the end of that deployment. They then examined new mental health diagnoses and suicide trends over time.

Nearly 109,000 (12.6%) experienced a TBI during deployment, and 2,695 had died by suicide through the end of 2018.

New-onset diagnoses of anxiety, mood disorders, posttraumatic stress disorder, alcohol use, and substance use disorder (SUD) after deployment were all more common in soldiers who experienced PTSD while serving compared with those with no history of TBI.

There was a 67.7% increase in mood disorders in participants with TBI compared with a 37.5% increase in those without TBI. The increase in new cases of alcohol use disorder was also greater in the TBI group (a 31.9% increase vs. a 10.3% increase).

But the sharpest difference was the increase in substance use disorder among those with TBI, which rose 100% compared with a 14.5% increase in solders with no history of TBI.
 

Sharp differences in time to suicide

Death by suicide was only slightly more common in those with TBI compared with those without (0.4% vs. 0.3%, respectively). But those with a brain injury committed suicide 21.3% sooner than did those without a head injury, after the researchers controlled for sex, age, race, ethnicity, and fiscal year of return from deployment.

Time to suicide was faster in those with a TBI and two or more new mental health diagnoses and fastest among those with TBI and a new SUD diagnosis, who took their own lives 62.8% faster than did those without a TBI.

The findings offer an important message to medical professionals in many different specialties, Dr. Brenner said.

“Folks in mental health probably have a lot of patients who have brain injury in their practice, and they don’t know it and that’s an important thing to know,” she said, adding that “neurologists should screen for depression and other mental health conditions and make sure those people have evidence-based treatments for those mental health conditions while they’re addressing the TBI-related symptoms.”
 

Applicable to civilians?

“The complex interplay between TBI, its potential effects on mental health, and risk of suicide remains a vexing focus of ongoing investigations and academic inquiry,” Ross Zafonte, DO, president of Spaulding Rehabilitation Hospital Network and professor and chair of physical medicine and rehabilitation at Harvard Medical School, Boston, and colleagues, wrote in an accompanying editorial.

The study builds on earlier work, they added, and praised the study’s longitudinal design and large cohort as key to the findings. The data on increased rates of new-onset substance use disorder, which was also associated with a faster time to suicide in the TBI group, were of particular interest.

“In this work, Brenner and colleagues identified substance use disorder as a key factor in faster time to suicide for active-duty service members with a history of TBI compared with those without TBI and theorized that a multiple stress or exposure burden may enhance risk,” they wrote. “This theory is reasonable and has been postulated among individuals with medical sequelae linked to TBI.”

However, the authors caution against applying these findings in military veterans to civilians.

“While this work is critical in the military population, caution should be given to avoid direct generalization to other populations, such as athletes, for whom the linkage to suicidal ideation is less understood,” they wrote.

The study was funded by National Institute of Mental Health and Office of the Director at National Institutes of Health. Dr. Brenner has received personal fees from Wolters Kluwer, Rand, American Psychological Association, and Oxford University Press and serves as a consultant to sports leagues via her university affiliation. Dr. Zafonte reported receiving royalties from Springer/Demos; serving as a member of the editorial boards of Journal of Neurotrauma and Frontiers in Neurology and scientific advisory boards of Myomo, Nanodiagnostics, Onecare.ai, and Kisbee; and evaluating patients in the MGH Brain and Body-TRUST Program, which is funded by the National Football League Players Association.
 

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

Measuring levels of the synaptic protein NPTX2 in cerebrospinal fluid (CSF) may serve as an early predictor of mild cognitive impairment (MCI) years before symptoms appear, new research indicates.

“Our study shows that low NPTX2 levels are predictive of MCI symptom onset more than 7 years in advance, including among individuals who are in late middle age,” said study investigator Anja Soldan, PhD, associate professor of neurology, Johns Hopkins University School of Medicine, Baltimore.

NPTX2 is still considered an “emerging biomarker” because knowledge about this protein is limited, Dr. Soldan noted.

Prior studies have shown that levels of NPTX2 are lower in people with MCI and dementia than in those with normal cognition and that low levels of this protein in people with MCI are associated with an increased risk of developing dementia.

“Our study extends these prior findings by showing that low protein levels are also associated with the onset of MCI symptoms,” Dr. Soldan said.

The study was published online in Annals of Neurology.
 

New therapeutic target?

The researchers measured NPTX2, as well as amyloid beta 42/40, phosphorylated (p)-tau181, and total (t)-tau in CSF collected longitudinally from 269 cognitively normal adults from the BIOCARD study.

The average age at baseline was 57.7 years. Nearly all were White, 59% were women, most were college educated, and three-quarters had a close relative with Alzheimer’s disease.

During a mean follow-up average of 16 years, 77 participants progressed to MCI or dementia within or after 7 years of baseline measurements.

In Cox regression models, lower baseline NPTX2 levels were associated with an earlier time to MCI symptom onset (hazard ratio, 0.76; P = .023). This association was significant for progression within 7 years (P = .036) and after 7 years from baseline (P = .001), the investigators reported.

Adults who progressed to MCI had, on average, about 15% lower levels of NPTX2 at baseline, compared with adults who remained cognitively normal.

Baseline NPTX2 levels improved prediction of time to MCI symptom onset after accounting for baseline Alzheimer’s disease biomarker levels (P < .01), and NPTX2 did not interact with the CSF Alzheimer’s disease biomarkers or APOE-ε4 genetic status.

Higher baseline levels of p-tau181 and t-tau were associated with higher baseline NPTX2 levels (both P < .001) and with greater declines in NPTX2 over time, suggesting that NPTX2 may decline in response to tau pathology, the investigators suggested.

Dr. Soldan said NPTX2 may be “a novel target” for developing new therapeutics for Alzheimer’s disease and other dementing and neurodegenerative disorders, as it is not an Alzheimer’s disease–specific protein.

“Efforts are underway for developing a sensitive way to measure NPTX2 brain levels in blood, which could then help clinicians identify individuals at greatest risk for cognitive decline,” she explained.

“Other next steps are to examine how changes in NPTX2 over time relate to changes in brain structure and function and to identify factors that alter levels of NPTX2, including genetic factors and potentially modifiable lifestyle factors,” Dr. Soldan said.

“If having higher levels of NPTX2 in the brain provides some resilience against developing symptoms of Alzheimer’s disease, it would be great if we could somehow increase levels of the protein,” she noted.
 

Caveats, cautionary notes

Commenting on this research, Christopher Weber, PhD, Alzheimer’s Association director of global science initiatives, said, “Research has shown that when NPTX2 levels are low, it may lead to weaker connections between neurons and could potentially affect cognitive functions, including memory and learning.”

“This new study found an association between lower levels of NPTX2 in CSF and earlier time to MCI symptom onset, and when combined with other established Alzheimer’s biomarkers, they found that NPTX2 improved the prediction of Alzheimer’s symptom onset,” Dr. Weber said.

“This is in line with previous research that suggests NPTX2 levels are associated with an increased risk of progression from MCI to Alzheimer’s dementia,” Dr. Weber said.

However, he noted some limitations of the study. “Participants were primarily White [and] highly educated, and therefore findings may not be generalizable to a real-world population,” he cautioned.

Dr. Weber said it’s also important to note that NPTX2 is not considered an Alzheimer’s-specific biomarker but rather a marker of synaptic activity and neurodegeneration. “The exact role of NPTX2 in predicting dementia is unknown,” Dr. Weber said.

He said that more studies with larger, more diverse cohorts are needed to fully understand its significance as a biomarker or therapeutic target for neurodegenerative diseases, as well as to develop a blood test for NPTX2.  

The study was supported by the National Institutes of Health. Dr. Soldan and Dr. Weber report no relevant financial relationships.

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

Measuring levels of the synaptic protein NPTX2 in cerebrospinal fluid (CSF) may serve as an early predictor of mild cognitive impairment (MCI) years before symptoms appear, new research indicates.

“Our study shows that low NPTX2 levels are predictive of MCI symptom onset more than 7 years in advance, including among individuals who are in late middle age,” said study investigator Anja Soldan, PhD, associate professor of neurology, Johns Hopkins University School of Medicine, Baltimore.

NPTX2 is still considered an “emerging biomarker” because knowledge about this protein is limited, Dr. Soldan noted.

Prior studies have shown that levels of NPTX2 are lower in people with MCI and dementia than in those with normal cognition and that low levels of this protein in people with MCI are associated with an increased risk of developing dementia.

“Our study extends these prior findings by showing that low protein levels are also associated with the onset of MCI symptoms,” Dr. Soldan said.

The study was published online in Annals of Neurology.
 

New therapeutic target?

The researchers measured NPTX2, as well as amyloid beta 42/40, phosphorylated (p)-tau181, and total (t)-tau in CSF collected longitudinally from 269 cognitively normal adults from the BIOCARD study.

The average age at baseline was 57.7 years. Nearly all were White, 59% were women, most were college educated, and three-quarters had a close relative with Alzheimer’s disease.

During a mean follow-up average of 16 years, 77 participants progressed to MCI or dementia within or after 7 years of baseline measurements.

In Cox regression models, lower baseline NPTX2 levels were associated with an earlier time to MCI symptom onset (hazard ratio, 0.76; P = .023). This association was significant for progression within 7 years (P = .036) and after 7 years from baseline (P = .001), the investigators reported.

Adults who progressed to MCI had, on average, about 15% lower levels of NPTX2 at baseline, compared with adults who remained cognitively normal.

Baseline NPTX2 levels improved prediction of time to MCI symptom onset after accounting for baseline Alzheimer’s disease biomarker levels (P < .01), and NPTX2 did not interact with the CSF Alzheimer’s disease biomarkers or APOE-ε4 genetic status.

Higher baseline levels of p-tau181 and t-tau were associated with higher baseline NPTX2 levels (both P < .001) and with greater declines in NPTX2 over time, suggesting that NPTX2 may decline in response to tau pathology, the investigators suggested.

Dr. Soldan said NPTX2 may be “a novel target” for developing new therapeutics for Alzheimer’s disease and other dementing and neurodegenerative disorders, as it is not an Alzheimer’s disease–specific protein.

“Efforts are underway for developing a sensitive way to measure NPTX2 brain levels in blood, which could then help clinicians identify individuals at greatest risk for cognitive decline,” she explained.

“Other next steps are to examine how changes in NPTX2 over time relate to changes in brain structure and function and to identify factors that alter levels of NPTX2, including genetic factors and potentially modifiable lifestyle factors,” Dr. Soldan said.

“If having higher levels of NPTX2 in the brain provides some resilience against developing symptoms of Alzheimer’s disease, it would be great if we could somehow increase levels of the protein,” she noted.
 

Caveats, cautionary notes

Commenting on this research, Christopher Weber, PhD, Alzheimer’s Association director of global science initiatives, said, “Research has shown that when NPTX2 levels are low, it may lead to weaker connections between neurons and could potentially affect cognitive functions, including memory and learning.”

“This new study found an association between lower levels of NPTX2 in CSF and earlier time to MCI symptom onset, and when combined with other established Alzheimer’s biomarkers, they found that NPTX2 improved the prediction of Alzheimer’s symptom onset,” Dr. Weber said.

“This is in line with previous research that suggests NPTX2 levels are associated with an increased risk of progression from MCI to Alzheimer’s dementia,” Dr. Weber said.

However, he noted some limitations of the study. “Participants were primarily White [and] highly educated, and therefore findings may not be generalizable to a real-world population,” he cautioned.

Dr. Weber said it’s also important to note that NPTX2 is not considered an Alzheimer’s-specific biomarker but rather a marker of synaptic activity and neurodegeneration. “The exact role of NPTX2 in predicting dementia is unknown,” Dr. Weber said.

He said that more studies with larger, more diverse cohorts are needed to fully understand its significance as a biomarker or therapeutic target for neurodegenerative diseases, as well as to develop a blood test for NPTX2.  

The study was supported by the National Institutes of Health. Dr. Soldan and Dr. Weber report no relevant financial relationships.

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

Measuring levels of the synaptic protein NPTX2 in cerebrospinal fluid (CSF) may serve as an early predictor of mild cognitive impairment (MCI) years before symptoms appear, new research indicates.

“Our study shows that low NPTX2 levels are predictive of MCI symptom onset more than 7 years in advance, including among individuals who are in late middle age,” said study investigator Anja Soldan, PhD, associate professor of neurology, Johns Hopkins University School of Medicine, Baltimore.

NPTX2 is still considered an “emerging biomarker” because knowledge about this protein is limited, Dr. Soldan noted.

Prior studies have shown that levels of NPTX2 are lower in people with MCI and dementia than in those with normal cognition and that low levels of this protein in people with MCI are associated with an increased risk of developing dementia.

“Our study extends these prior findings by showing that low protein levels are also associated with the onset of MCI symptoms,” Dr. Soldan said.

The study was published online in Annals of Neurology.
 

New therapeutic target?

The researchers measured NPTX2, as well as amyloid beta 42/40, phosphorylated (p)-tau181, and total (t)-tau in CSF collected longitudinally from 269 cognitively normal adults from the BIOCARD study.

The average age at baseline was 57.7 years. Nearly all were White, 59% were women, most were college educated, and three-quarters had a close relative with Alzheimer’s disease.

During a mean follow-up average of 16 years, 77 participants progressed to MCI or dementia within or after 7 years of baseline measurements.

In Cox regression models, lower baseline NPTX2 levels were associated with an earlier time to MCI symptom onset (hazard ratio, 0.76; P = .023). This association was significant for progression within 7 years (P = .036) and after 7 years from baseline (P = .001), the investigators reported.

Adults who progressed to MCI had, on average, about 15% lower levels of NPTX2 at baseline, compared with adults who remained cognitively normal.

Baseline NPTX2 levels improved prediction of time to MCI symptom onset after accounting for baseline Alzheimer’s disease biomarker levels (P < .01), and NPTX2 did not interact with the CSF Alzheimer’s disease biomarkers or APOE-ε4 genetic status.

Higher baseline levels of p-tau181 and t-tau were associated with higher baseline NPTX2 levels (both P < .001) and with greater declines in NPTX2 over time, suggesting that NPTX2 may decline in response to tau pathology, the investigators suggested.

Dr. Soldan said NPTX2 may be “a novel target” for developing new therapeutics for Alzheimer’s disease and other dementing and neurodegenerative disorders, as it is not an Alzheimer’s disease–specific protein.

“Efforts are underway for developing a sensitive way to measure NPTX2 brain levels in blood, which could then help clinicians identify individuals at greatest risk for cognitive decline,” she explained.

“Other next steps are to examine how changes in NPTX2 over time relate to changes in brain structure and function and to identify factors that alter levels of NPTX2, including genetic factors and potentially modifiable lifestyle factors,” Dr. Soldan said.

“If having higher levels of NPTX2 in the brain provides some resilience against developing symptoms of Alzheimer’s disease, it would be great if we could somehow increase levels of the protein,” she noted.
 

Caveats, cautionary notes

Commenting on this research, Christopher Weber, PhD, Alzheimer’s Association director of global science initiatives, said, “Research has shown that when NPTX2 levels are low, it may lead to weaker connections between neurons and could potentially affect cognitive functions, including memory and learning.”

“This new study found an association between lower levels of NPTX2 in CSF and earlier time to MCI symptom onset, and when combined with other established Alzheimer’s biomarkers, they found that NPTX2 improved the prediction of Alzheimer’s symptom onset,” Dr. Weber said.

“This is in line with previous research that suggests NPTX2 levels are associated with an increased risk of progression from MCI to Alzheimer’s dementia,” Dr. Weber said.

However, he noted some limitations of the study. “Participants were primarily White [and] highly educated, and therefore findings may not be generalizable to a real-world population,” he cautioned.

Dr. Weber said it’s also important to note that NPTX2 is not considered an Alzheimer’s-specific biomarker but rather a marker of synaptic activity and neurodegeneration. “The exact role of NPTX2 in predicting dementia is unknown,” Dr. Weber said.

He said that more studies with larger, more diverse cohorts are needed to fully understand its significance as a biomarker or therapeutic target for neurodegenerative diseases, as well as to develop a blood test for NPTX2.  

The study was supported by the National Institutes of Health. Dr. Soldan and Dr. Weber report no relevant financial relationships.

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

Inhaling a pleasant aroma during sleep has been linked to a “dramatic” improvement in memory, early research suggests.

In a small, randomized controlled trial researchers found that when cognitively normal individuals were exposed to the scent of an essential oil for 2 hours every night over 6 months, they experienced a 226% improvement in memory compared with a control group who received only a trace amount of the diffused scent.

In addition, functional magnetic resonance imaging (fMRI) showed that those in the enriched group had improved functioning of the left uncinate fasciculus, an area of the brain linked to memory and cognition, which typically declines with age.

“To my knowledge, that level of [memory] improvement is far greater than anything that has been reported for healthy older adults and we also found a critical memory pathway in their brains improved to a similar extent relative to unenriched older adults,” senior investigator Michael Leon, PhD, professor emeritus, University of California, Irvine, said in an interview.

The study was published online in Frontiers of Neuroscience.
 

The brain’s “superhighway”

Olfactory enrichment “involves the daily exposure of individuals to multiple odorants” and has been shown in mouse models to improve memory and neurogenesis, the investigators noted.

A previous study showed that exposure to individual essential oils for 30 minutes a day over 3 months induced neurogenesis in the olfactory bulb and the hippocampus.

“The olfactory system is the only sense that has a direct ‘superhighway’ input to the memory centers areas of the brain; all the other senses have to reach those brain areas through what you might call the ‘side streets’ of the brain, and so consequently, they have much less impact on maintaining the health of those memory centers.”

When olfaction is compromised, “the memory centers of the brain start to deteriorate and, conversely, when people are given olfactory enrichment, their memory areas become larger and more functional,” he added.

Olfactory dysfunction is the first symptom of Alzheimer’s disease (AD) and is also found in virtually all neurological and psychiatric disorders.

“I’ve counted 68 of them – including anorexia, anxiety, [attention-deficit/hyperactivity disorder], depression, epilepsy, and stroke. In fact, by mid-life, your all-cause mortality can be predicted by your ability to smell things,” Dr. Leon said.

Dr. Leon and colleagues previously developed an effective treatment for autism using environmental enrichment that focused on odor stimulation, along with stimulating other senses. “We then considered the possibility that olfactory enrichment alone might improve brain function.”
 

Rose, orange, eucalyptus …

For the study, the researchers randomly assigned 43 older adults, aged 60-85 years, to receive either nightly exposure to essential oil scents delivered via a diffuser (n = 20; mean [SD] age, 70.1 [6.6] years) or to a sham control with only trace amounts of odorants (n = 23; mean age, 69.2 [7.1] years) for a period of 6 months.

The intervention group was exposed to a single odorant, delivered through a diffuser, for 2 hours nightly, rotating through seven pleasant aromas each week. They included rose, orange, eucalyptus, lemon, peppermint, rosemary, and lavender scents.

All participants completed a battery of tests at baseline, including the Mini-Mental State Examination (MMSE), which confirmed normal cognitive functioning. At baseline and after a 6-month follow-up, participants completed the Rey Auditory Verbal Learning Test (RAVLT) as well as three subsets of the Wechsler Adult Intelligence Scale–Third Edition (WAIS-III).

Olfactory system function was assessed using “Sniffin Sticks,” allowing the researchers to determine if olfactory enrichment enhanced olfactory performance.

Participants underwent fMRI at baseline and again at 6 months.

Brain imaging results showed a “clear, statistically significant 226% difference between enriched and control older adults in performance on the RAVLT, which evaluates learning and memory (timepoint × group interaction; F = 6.63; P = .02; Cohen’s d = 1.08; a “large effect size”).

They also found a significant change in the mean diffusivity of the left uncinate fasciculus in the enriched group compared with the controls (timepoint × group interaction; F = 4.39; P = .043; h 2 p = .101; a “medium-size effect”).

The uncinate fasciculus is a “major pathway” connecting the basolateral amygdala and the entorhinal cortex to the prefrontal cortex. This pathway deteriorates in aging and in AD and “has been suggested to play a role in mediating episodic memory, language, socio-emotional processing, and selecting among competing memories during retrieval.”

No significant differences were found between the groups in olfactory ability.

Limitations of the study include its small sample size. The investigators hope the findings will “stimulate larger scale clinical trials systematically testing the therapeutic efficacy of olfactory enrichment in treating memory loss in older adults.”
 

Exciting but preliminary

Commenting for this article, Donald Wilson, PhD, professor of child and adolescent psychiatry and of neuroscience and physiology, the Child Study Center, NYU Langone Medical Center, New York, said that multiple studies have “demonstrated that problems with sense of smell are associated with and sometimes can precede other symptoms for many disorders, including AD, Parkinson’s disease, and depression.”

Recent work has suggested that this relationship can be “bidirectional” – for example, losing one’s sense of smell might promote depression, while depressive disorder might lead to impaired smell, according to Dr. Wilson, also director and senior research scientist, the Emotional Brain Institute, Nathan Kline Institute for Psychiatric Research. He was not involved with the study.

This “two-way interaction” may raise the possibility that “improving olfaction could impact nonolfactory disorders.”

This paper “brings together” previous research findings to show that odors during bedtime can improve some aspects of cognitive function and circuits that are known to be important for memory and cognition – which Dr. Wilson called “a very exciting, though relatively preliminary, finding.”

A caveat is that several measures of cognitive function were assessed and only one (verbal memory) showed clear improvement.

Nevertheless, there’s “very strong interest now in the olfactory and nonolfactory aspects of odor training and this training expands the training possibilities to sleep. This could be a powerful tool for cognitive improvement and/or rescue if follow-up studies support these findings,” Dr. Wilson said.

A version of this article appeared on Medscape.com.

Inhaling a pleasant aroma during sleep has been linked to a “dramatic” improvement in memory, early research suggests.

In a small, randomized controlled trial researchers found that when cognitively normal individuals were exposed to the scent of an essential oil for 2 hours every night over 6 months, they experienced a 226% improvement in memory compared with a control group who received only a trace amount of the diffused scent.

In addition, functional magnetic resonance imaging (fMRI) showed that those in the enriched group had improved functioning of the left uncinate fasciculus, an area of the brain linked to memory and cognition, which typically declines with age.

“To my knowledge, that level of [memory] improvement is far greater than anything that has been reported for healthy older adults and we also found a critical memory pathway in their brains improved to a similar extent relative to unenriched older adults,” senior investigator Michael Leon, PhD, professor emeritus, University of California, Irvine, said in an interview.

The study was published online in Frontiers of Neuroscience.
 

The brain’s “superhighway”

Olfactory enrichment “involves the daily exposure of individuals to multiple odorants” and has been shown in mouse models to improve memory and neurogenesis, the investigators noted.

A previous study showed that exposure to individual essential oils for 30 minutes a day over 3 months induced neurogenesis in the olfactory bulb and the hippocampus.

“The olfactory system is the only sense that has a direct ‘superhighway’ input to the memory centers areas of the brain; all the other senses have to reach those brain areas through what you might call the ‘side streets’ of the brain, and so consequently, they have much less impact on maintaining the health of those memory centers.”

When olfaction is compromised, “the memory centers of the brain start to deteriorate and, conversely, when people are given olfactory enrichment, their memory areas become larger and more functional,” he added.

Olfactory dysfunction is the first symptom of Alzheimer’s disease (AD) and is also found in virtually all neurological and psychiatric disorders.

“I’ve counted 68 of them – including anorexia, anxiety, [attention-deficit/hyperactivity disorder], depression, epilepsy, and stroke. In fact, by mid-life, your all-cause mortality can be predicted by your ability to smell things,” Dr. Leon said.

Dr. Leon and colleagues previously developed an effective treatment for autism using environmental enrichment that focused on odor stimulation, along with stimulating other senses. “We then considered the possibility that olfactory enrichment alone might improve brain function.”
 

Rose, orange, eucalyptus …

For the study, the researchers randomly assigned 43 older adults, aged 60-85 years, to receive either nightly exposure to essential oil scents delivered via a diffuser (n = 20; mean [SD] age, 70.1 [6.6] years) or to a sham control with only trace amounts of odorants (n = 23; mean age, 69.2 [7.1] years) for a period of 6 months.

The intervention group was exposed to a single odorant, delivered through a diffuser, for 2 hours nightly, rotating through seven pleasant aromas each week. They included rose, orange, eucalyptus, lemon, peppermint, rosemary, and lavender scents.

All participants completed a battery of tests at baseline, including the Mini-Mental State Examination (MMSE), which confirmed normal cognitive functioning. At baseline and after a 6-month follow-up, participants completed the Rey Auditory Verbal Learning Test (RAVLT) as well as three subsets of the Wechsler Adult Intelligence Scale–Third Edition (WAIS-III).

Olfactory system function was assessed using “Sniffin Sticks,” allowing the researchers to determine if olfactory enrichment enhanced olfactory performance.

Participants underwent fMRI at baseline and again at 6 months.

Brain imaging results showed a “clear, statistically significant 226% difference between enriched and control older adults in performance on the RAVLT, which evaluates learning and memory (timepoint × group interaction; F = 6.63; P = .02; Cohen’s d = 1.08; a “large effect size”).

They also found a significant change in the mean diffusivity of the left uncinate fasciculus in the enriched group compared with the controls (timepoint × group interaction; F = 4.39; P = .043; h 2 p = .101; a “medium-size effect”).

The uncinate fasciculus is a “major pathway” connecting the basolateral amygdala and the entorhinal cortex to the prefrontal cortex. This pathway deteriorates in aging and in AD and “has been suggested to play a role in mediating episodic memory, language, socio-emotional processing, and selecting among competing memories during retrieval.”

No significant differences were found between the groups in olfactory ability.

Limitations of the study include its small sample size. The investigators hope the findings will “stimulate larger scale clinical trials systematically testing the therapeutic efficacy of olfactory enrichment in treating memory loss in older adults.”
 

Exciting but preliminary

Commenting for this article, Donald Wilson, PhD, professor of child and adolescent psychiatry and of neuroscience and physiology, the Child Study Center, NYU Langone Medical Center, New York, said that multiple studies have “demonstrated that problems with sense of smell are associated with and sometimes can precede other symptoms for many disorders, including AD, Parkinson’s disease, and depression.”

Recent work has suggested that this relationship can be “bidirectional” – for example, losing one’s sense of smell might promote depression, while depressive disorder might lead to impaired smell, according to Dr. Wilson, also director and senior research scientist, the Emotional Brain Institute, Nathan Kline Institute for Psychiatric Research. He was not involved with the study.

This “two-way interaction” may raise the possibility that “improving olfaction could impact nonolfactory disorders.”

This paper “brings together” previous research findings to show that odors during bedtime can improve some aspects of cognitive function and circuits that are known to be important for memory and cognition – which Dr. Wilson called “a very exciting, though relatively preliminary, finding.”

A caveat is that several measures of cognitive function were assessed and only one (verbal memory) showed clear improvement.

Nevertheless, there’s “very strong interest now in the olfactory and nonolfactory aspects of odor training and this training expands the training possibilities to sleep. This could be a powerful tool for cognitive improvement and/or rescue if follow-up studies support these findings,” Dr. Wilson said.

A version of this article appeared on Medscape.com.

Inhaling a pleasant aroma during sleep has been linked to a “dramatic” improvement in memory, early research suggests.

In a small, randomized controlled trial researchers found that when cognitively normal individuals were exposed to the scent of an essential oil for 2 hours every night over 6 months, they experienced a 226% improvement in memory compared with a control group who received only a trace amount of the diffused scent.

In addition, functional magnetic resonance imaging (fMRI) showed that those in the enriched group had improved functioning of the left uncinate fasciculus, an area of the brain linked to memory and cognition, which typically declines with age.

“To my knowledge, that level of [memory] improvement is far greater than anything that has been reported for healthy older adults and we also found a critical memory pathway in their brains improved to a similar extent relative to unenriched older adults,” senior investigator Michael Leon, PhD, professor emeritus, University of California, Irvine, said in an interview.

The study was published online in Frontiers of Neuroscience.
 

The brain’s “superhighway”

Olfactory enrichment “involves the daily exposure of individuals to multiple odorants” and has been shown in mouse models to improve memory and neurogenesis, the investigators noted.

A previous study showed that exposure to individual essential oils for 30 minutes a day over 3 months induced neurogenesis in the olfactory bulb and the hippocampus.

“The olfactory system is the only sense that has a direct ‘superhighway’ input to the memory centers areas of the brain; all the other senses have to reach those brain areas through what you might call the ‘side streets’ of the brain, and so consequently, they have much less impact on maintaining the health of those memory centers.”

When olfaction is compromised, “the memory centers of the brain start to deteriorate and, conversely, when people are given olfactory enrichment, their memory areas become larger and more functional,” he added.

Olfactory dysfunction is the first symptom of Alzheimer’s disease (AD) and is also found in virtually all neurological and psychiatric disorders.

“I’ve counted 68 of them – including anorexia, anxiety, [attention-deficit/hyperactivity disorder], depression, epilepsy, and stroke. In fact, by mid-life, your all-cause mortality can be predicted by your ability to smell things,” Dr. Leon said.

Dr. Leon and colleagues previously developed an effective treatment for autism using environmental enrichment that focused on odor stimulation, along with stimulating other senses. “We then considered the possibility that olfactory enrichment alone might improve brain function.”
 

Rose, orange, eucalyptus …

For the study, the researchers randomly assigned 43 older adults, aged 60-85 years, to receive either nightly exposure to essential oil scents delivered via a diffuser (n = 20; mean [SD] age, 70.1 [6.6] years) or to a sham control with only trace amounts of odorants (n = 23; mean age, 69.2 [7.1] years) for a period of 6 months.

The intervention group was exposed to a single odorant, delivered through a diffuser, for 2 hours nightly, rotating through seven pleasant aromas each week. They included rose, orange, eucalyptus, lemon, peppermint, rosemary, and lavender scents.

All participants completed a battery of tests at baseline, including the Mini-Mental State Examination (MMSE), which confirmed normal cognitive functioning. At baseline and after a 6-month follow-up, participants completed the Rey Auditory Verbal Learning Test (RAVLT) as well as three subsets of the Wechsler Adult Intelligence Scale–Third Edition (WAIS-III).

Olfactory system function was assessed using “Sniffin Sticks,” allowing the researchers to determine if olfactory enrichment enhanced olfactory performance.

Participants underwent fMRI at baseline and again at 6 months.

Brain imaging results showed a “clear, statistically significant 226% difference between enriched and control older adults in performance on the RAVLT, which evaluates learning and memory (timepoint × group interaction; F = 6.63; P = .02; Cohen’s d = 1.08; a “large effect size”).

They also found a significant change in the mean diffusivity of the left uncinate fasciculus in the enriched group compared with the controls (timepoint × group interaction; F = 4.39; P = .043; h 2 p = .101; a “medium-size effect”).

The uncinate fasciculus is a “major pathway” connecting the basolateral amygdala and the entorhinal cortex to the prefrontal cortex. This pathway deteriorates in aging and in AD and “has been suggested to play a role in mediating episodic memory, language, socio-emotional processing, and selecting among competing memories during retrieval.”

No significant differences were found between the groups in olfactory ability.

Limitations of the study include its small sample size. The investigators hope the findings will “stimulate larger scale clinical trials systematically testing the therapeutic efficacy of olfactory enrichment in treating memory loss in older adults.”
 

Exciting but preliminary

Commenting for this article, Donald Wilson, PhD, professor of child and adolescent psychiatry and of neuroscience and physiology, the Child Study Center, NYU Langone Medical Center, New York, said that multiple studies have “demonstrated that problems with sense of smell are associated with and sometimes can precede other symptoms for many disorders, including AD, Parkinson’s disease, and depression.”

Recent work has suggested that this relationship can be “bidirectional” – for example, losing one’s sense of smell might promote depression, while depressive disorder might lead to impaired smell, according to Dr. Wilson, also director and senior research scientist, the Emotional Brain Institute, Nathan Kline Institute for Psychiatric Research. He was not involved with the study.

This “two-way interaction” may raise the possibility that “improving olfaction could impact nonolfactory disorders.”

This paper “brings together” previous research findings to show that odors during bedtime can improve some aspects of cognitive function and circuits that are known to be important for memory and cognition – which Dr. Wilson called “a very exciting, though relatively preliminary, finding.”

A caveat is that several measures of cognitive function were assessed and only one (verbal memory) showed clear improvement.

Nevertheless, there’s “very strong interest now in the olfactory and nonolfactory aspects of odor training and this training expands the training possibilities to sleep. This could be a powerful tool for cognitive improvement and/or rescue if follow-up studies support these findings,” Dr. Wilson said.

A version of this article appeared on Medscape.com.