Saturday, January 20, 2024

 

The Lancet Child & Adolescent Health: Paediatric care for non-White children is universally worse across the USA; policy reform urgently needed to address disparities


Peer-Reviewed Publication

THE LANCET





The Lancet Child & Adolescent Health: Paediatric care for non-White children is universally worse across the USA; policy reform urgently needed to address disparities

  • Two-paper Series identifies pervasive racial inequities in paediatric care in the USA, and outlines policies to address structural racism embedded in wider sectors of society that shape children’s health.
  • A review of recent evidence reveals widespread patterns of inequitable care across paediatric specialties, including neonatal care, emergency medicine, surgery, developmental disabilities, mental health care, and palliative care, regardless of health insurance status.
  • The authors call for policies to counteract structural racism embedded in society including housing, employment, health insurance, immigration, and the criminal justice system, that could help address health inequities and thereby improve the health of children from racial and minority ethnic groups in the USA.  Wide-ranging inequities in paediatric care across specialities 

 

Overcoming these pervasive healthcare inequities – borne of structural racism – requires policy changes in multiple sectors of wider society, including housing, health insurance, and the criminal justice system. 

Series author Dr Monique Jindal, of University of Illinois Chicago School of Medicine, said: “There are deeply entrenched racial disparities that span broad sectors of US society and transcend generations. These lead to, among other disadvantages, stark inequities in healthcare for children from minoritised racial and ethnic groups. It is abundantly clear that to ensure every child in the USA receives the best possible healthcare, there is a critical need for far-reaching policy changes that directly address deep-rooted structural racism at its core.” [1]

Wide-ranging inequities in paediatric care across specialities 

The Series reveals extensive inequities in care across paediatric specialties, including neonatal care, emergency medicine, and palliative care. 

By limiting the review to studies that controlled for health insurance status, the authors identified differences in care quality that are not due to a lack of access to health services. 

Evidence from the past five years indicates infants from minoritised racial and ethnic groups, particularly Black and Hispanic children, consistently receive lower-quality neonatal care than White infants. In primary care, there is poorer quality communication between healthcare providers and children, youth and families from minoritized racial and ethnic groups, contributing to persistent inequalities. 

Disparities also exist in end-of-life care, the study found. Black, Hispanic, and Asian American children who receive palliative care are more likely to die in the hospital compared to White children. Hispanic children are also more likely to receive medically-intense care during their last days of life.

Differences in wait times, triage assessment, and the evaluation of suspected child abuse for children from minoritised racial and ethnic groups were also found for emergency medicine. The strongest evidence of disparities was in pain management with children from minoritised racial and ethnic groups being less likely than their White peers to receive painkillers for a broken arm or leg, appendicitis, or migraine. The overall trend indicated more care for White patients – such as more painkillers, antibiotics, IV fluids, and diagnostic imaging – even when not justified on medical grounds. 

Disparities exist in the diagnosis of developmental disabilities, with Black and Asian children less likely to be diagnosed before preschool or kindergarten as compared to White children, while Latino children with special health care needs receive fewer specialist services than their White peers. There are also inequities in mental health care services, with lower rates of adequate care for major depressive disorder and ADHD among Black, Hispanic, and other children from minoritised racial and ethnic groups compared with White children. 

Dr Natalie Slopen, of Harvard University, who led the research review, said, “From the very earliest moments of life, there are pervasive inequities in the quality of healthcare received by children in the USA. Racism profoundly impacts not only children’s health but also people’s health on into adulthood, emphasising the vital importance of tackling disparities in the care received by children.” [1]

Structural and systemic obstacles to equitable paediatric care

Existing policies and practices at the local, state, and federal levels in the USA create and perpetuate structural racism, leading to paediatric health disparities among minoritised racial and ethnic groups. These pose significant obstacles to achieving child health equity and highlight the need for policy solutions that directly address entrenched structural racism. 

Housing and neighbourhood policies play a major role in health disparities, as housing instability, poor quality, unaffordability, and neighbourhood characteristics significantly influence children's health outcomes. Racial disparities in housing – which are deeply rooted in historical policies – persist and impact health outcomes, indicating a need for comprehensive strategies to improve social and economic conditions in segregated neighbourhoods. 

Economic and employment policies underscore the impact of low socioeconomic status on children's health, with racial income gaps persisting and anti-poverty programs needing an anti-racist approach. Disparities in health insurance access persist, especially for children from minoritised racial and ethnic groups, highlighting the importance of expanding Medicaid and Children’s Health Insurance Program (CHIP) coverage to achieve equity in paediatric health. 

The criminal justice system's disproportionate impact on Black people is linked to numerous ill health effects, emphasising the need for policies that prevent young people from going to prison and mitigating the effects on children with parents in prison. Immigration policies also have a significant effect on children's health by determining access to public benefits, with policies enhancing eligibility linked to better paediatric health outcomes.

“We now have more evidence than ever that paediatric care in the USA is not only disparate, but inequitable for a large group of children. Policies that advance health justice and reach across institutions, communities, and populations are urgently needed,” said Series lead Dr Nia Heard-Garris, of the Ann & Robert H. Lurie Children’s Hospital of Chicago and Northwestern University. [1]

Policy reform for healthier children

Based on their analysis, the authors make wide-ranging recommendations for policy changes to counteract pervasive disparities in paediatric care in the USA. “We must fundamentally rethink and redesign systems and policies, not only in healthcare but across the societal spectrum, to promote equitable, excellent health for all children,” said Dr Slopen.

The authors point to numerous changes that could be implemented in broad sectors of society, including measures to improve the social and economic conditions of segregated neighbourhoods, which can benefit child health. Investments in communities can improve access to resources and opportunities, and has been linked to reduced depression and obesity and increased physical activity. Other measures – such as eviction prevention policies – could also ultimately benefit the health of children from racial and minority ethnic backgrounds.

Universal access to health insurance and standardising administrative policies would ultimately deliver greater paediatric health equity. However, there are several areas within health insurance policy that could improve health equity for children more immediately. These include expanding Medicaid/CHIP continuous eligibility beyond 12 months, increasing Medicaid/CHIP provider reimbursement rates, and focusing on social determinants of health.

Enacting policies that set age boundaries to ensure no children are placed in adult prisons can mitigate the heightened risk they face of physical and sexual assault and psychological trauma. In general, policies must reflect that the youth justice system should be used only as a last resort. When it comes to immigration policies, those that increase eligibility for employment, education, and access to resources are also linked with better paediatric health outcomes. 

The authors outline several implications of their findings for healthcare practice and policy, including that hospital and other healthcare systems should investigate and address sources of structural racism within their existing policies and guidelines and that senior managers of healthcare systems and providers must take steps to eliminate race-based paediatric care. They also highlight that policy changes to end racial segregation of paediatric care and enhance the diversity of the medical workforce are needed. 

The authors also say further research is needed to better characterise the experiences of Asian American and Native American paediatric patients, and children classified as belonging to multiple racial or ethnic groups. Future work should also investigate the intersection of race and ethnicity with other socio-demographic features, such as gender identity, sexual orientation, and family immigration history. 

NOTES TO EDITORS

The review paper was funded by the CZI/Silicon Valley Community Foundation, Eunice Kennedy Shriver National Institute for Child Health and Human Development, National Institutes of Health, and National Heart Lung and Blood Institute. It was conducted by researchers from Harvard University, University of California, Davis, University of Southern California, Northwestern University, Ann & Robert H. Lurie Children’s Hospital of Chicago, University of Illinois Chicago, University of Minnesota, Thomas Jefferson University, Australian National University, and Emory University. 

The policy paper was funded by the National Institutes of Health. It was conducted by researchers from University of Illinois Chicago, University of California, Los Angeles, University of Minnesota, Ann & Robert H. Lurie Children’s Hospital of Chicago, Northwestern University, Northeastern University, ohns Hopkins University School of Medicine, US Department of Health and Human Services, Harvard University, Emory University, and Brigham and Women’s Hospital, Boston.

[1] Quote direct from author and cannot be found in the text of the Article.

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New air purifier design with innovative foam technology promises virus-stopping performance and zero waste


Purifier invented by University of Bath engineers is ready for commercialization, seeking partners


Business Announcement

UNIVERSITY OF BATH

Professor Semali Perera with FOAM3R foam 

IMAGE: 

PROFESSOR SEMALI PERERA WITH FOAM3R FOAM

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CREDIT: UNIVERSITY OF BATH





Researchers at the University of Bath have invented a new form of high-performance air purifier that promises zero harmful waste.

Key to the purifier and how it works is FOAM3R filter technology, patented by the University, which is described as a highly adaptable disruptor technology for microbial, COand volatile organic compound (VOC) odour removal.

FOAM3R can be used to produce multi-functional foam structures for a wide range of applications, including aircraft cabins, in-car air filters, ship and boat cabins, residential heating, ventilation and air-conditioning, home air purifiers and respirator and breathing apparatus.

The innovative foam comprises of high temperature polymer and active media such as selective adsorbents to capture contaminants and antibacterial agents to combat microbes. It is mouldable and lightweight, energy-efficient and anti-bacterial, and the addition of active metals into the structure makes it 99.999% efficient in removing common bacteria and viruses.

It also boasts a tailorable composition that allows for targeted capture of a wide range of small to large VOCs – some of which are responsible for unpleasant smells, while others can be harmful to human health – and high-performance removal of CO2.

The home air purifier design, currently in the prototype stage, features two cylindrical columns of the FOAM3R material. During operation, one column is used to purify the air, while the other ‘regenerates’ for reuse through heating, restoring the foam’s sorbent properties.

The process also removes collected pollutants and dead microbial debris captured in the air through heating, and recovers volatile components through cooling and condensation, which are collected as a liquid that is safe to pour away.

FOAM3R is created in a simple one-step manufacturing process and can be shaped into a variety of form factors. It can also be retro-fitted into existing technology and is more energy efficient than comparable carbon-granule based air purification systems.

Professor Semali Perera, from Bath’s Department of Chemical Engineering, says the air purifier design and FOAM3R technology could present a breakthrough in air purification. She adds: “We have created a highly efficient design, with none of the disposable cartridges or waste that we see in many commercial air purifiers, so there are several benefits to what we’ve created.

“Our next step is to engage potential commercial partners with the requisite expertise to bring our invention to the market.”

The development team includes Prof Perera, Professor John Chew, Professor Barry Crittenden, Dr Ramya G, Dr Olivier Camus and Dr Stuart Scott.

The University of Bath research team is seeking partnerships to help develop the technology. Interested parties can contact Irene Henning, Technology Transfer Manager, at ih468@bath.ac.uk.

FOAM3R foam developed at the University of Bath

CREDIT

University of Bath

Images are available at: http://tinyurl.com/5jn49ftm (credit: University of Bath)

For more information or to request interviews, contact Will McManus in the University of Bath press office at wem25@bath.ac.uk or on +44 (0)1225 385798.

The University of Bath 

The University of Bath is one of the UK's leading universities for high-impact research with a reputation for excellence in education, student experience and graduate prospects. 

We are named ‘University of the Year’ in The Times and The Sunday Times Good University Guide 2023, and ranked among the world’s top 10% of universities, placing 148th in the QS World University Rankings 2024. We are ranked 5th in the UK in the Complete University Guide 2024, 6th in the Guardian University Guide 2024 and 8th in The Times and Sunday Times Good University Guide 2024. 

Bath is rated in the world’s top 10 universities for sport in the QS World University Ranking by Subject 2023. We produce some of the world’s most job-ready graduates and were named University of the Year for Graduate Jobs by the Daily Mail University Guide 2024, as well as ranking as one of the world’s top 90 universities for employer reputation according to the QS World University Rankings 2024.

Research from Bath is helping to change the world for the better. Across the University’s three Faculties and School of Management, our research is making an impact in society, leading to low-carbon living, positive digital futures, and improved health and wellbeing. Find out all about our Research with Impact: https://www.bath.ac.uk/campaigns/research-with-impact/

 

KIST's 'Moonwalk', a robot that makes climbing Bukhansan Mountain easier


Elderly man wears robot to climb Bukhansan Mountain in wearable robotics challenge. Wearable robots are leaving the hospital and entering our lives.


Business Announcement

NATIONAL RESEARCH COUNCIL OF SCIENCE & TECHNOLOGY

Figure 1 

IMAGE: 

(BUKHANSAN CHALLENGE)AN ELDERLY MAN WALKS UP A COMPLEX STONE STAIRCASE ENVIRONMENT WHILE WEARING A ROBOT DURING A WEARABLE CHALLENGE IN KOREA.(BUKHANSAN CHALLENGE)

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CREDIT: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY





As people age, they gradually lose muscle strength in their arms and legs, making it difficult for them to participate in leisure activities such as hiking and traveling, and they often need to rely on assistive devices such as canes and wheelchairs for mobility. However, these assistive devices do not improve muscle strength, so wearable robots that can compensate for the lack of muscle strength with the help of robots are attracting attention as an innovative technology to improve the health and quality of life of the elderly.

Dr. Lee Jongwon of the Intelligent Robotics Research Center at the Korea Institute of Science and Technology(KIST) has developed a wearable robot, MOONWALK-Omni, which means 'to actively support leg strength in any direction(omnidirection) to help walk like walking on the moon', has announced that a senior citizen wearing it successfully completed a wearable robot challenge to climb to the top of Mount Yeongbong (604 meters above sea level) in Korea. The challenge raised the possibility of commercializing wearable robots in outdoor complex environments by successfully climbing with the help of the robot's muscle strength without changing batteries or intervention from developers.

Various types of wearable robots have been developed in the past, but due to their heavy weight and large volume, they have been limited to the rehabilitation process of patients in hospitals with simple indoor environments. However, MOONWALK-Omni is an ultra-lightweight wearable strength-assistance robot that predicts the user's movements and supports insufficient leg strength to help the elderly rehabilitate and assist with daily activities. The 2-kilogram device can be easily donned by an older adult in less than 10 seconds without assistance, and its four ultra-lightweight, high-powered actuators on either side of the pelvis help balance the user while walking and boost the wearer's leg strength by up to 30 percent to increase propulsion.

The robot's artificial intelligence (AI) analyzes the wearer's gait in real time and provides safe and effective muscle support in a variety of walking environments, including gentle slopes, rough rocky paths, steep wooden stairs, and uneven stone steps. Through the Bukhansan Mountain Wearable Robot Challenge, the research team succeeded in verifying the performance and reliability of muscle support using wearable robots in everyday environments that are more complex than hospitals.

An elderly participant in the challenge said, "I thought I would have to give up mountain climbing, which I have enjoyed since I was young, but I feel 10 to 20 years younger after climbing the mountain comfortably with the wearable robot," and shared his impressions of climbing the mountain with the wearable robot.

Dr. Lee Jong-won of KIST said, "Through this challenge, we have obtained experimental data that shows that safe and effective strength support is possible in a variety of walking environments." "Through the convergence of ultra-lightweight, high-power wearable robot drive technology and personalized artificial intelligence strength support technology, it is expected to be widely used in the fields of daily assistance, rehabilitation, and exercise for the elderly who lack muscle strength due to aging."

As a follow-up to MOONWALK-Omni, the research team is developing MOONWALK-Support, which not only strengthens leg muscles but also supports the complex joints of the lower extremities such as hip and knee. In addition, the team has achieved achievements in various fields by transferring core technologies and components such as motors, reducers, and computing circuits for wearable robots to company in Korea.

 

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KIST was established in 1966 as the first government-funded research institute in Korea. KIST now strives to solve national and social challenges and secure growth engines through leading and innovative research. For more information, please visit KIST’s website at https://eng.kist.re.kr/

 

For this beetle, ‘date night’ comes every other day


Researchers study anomalous 48-hour cycle of large black chafer beetle

Peer-Reviewed Publication

UNIVERSITY OF CALIFORNIA - DAVIS

For This Beetle, ‘Date Night’ Comes Every Other Day 

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HOLOTRICHIA PARALLELA, THE LARGE BLACK CHAFER BEETLE, IS A SERIOUS AGRICULTURAL PEST IN ASIA. THE BEETLES HAVE AN UNUSUAL MATING STRATEGY, WITH FEMALES EMERGING EVERY OTHER NIGHT AND RELEASING A PHEROMONE SCENT TO ATTRACT MALES. A NEW STUDY BY RESEARCHERS AT UC DAVIS AND IN CHINA SHOWS THAT THE MALE BEETLES' ABILITY TO DETECT FEMALE PHEROMONES IS ALSO ON A 48-HOUR, OR CIRCABIDIAN, CYCLE.

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CREDIT: HOLOTRICHIA PARALLELA OBSERVED IN HONG KONG BY LTONG__, LICENSED UNDER HTTP://CREATIVECOMMONS.ORG/LICENSES/BY-NC/4.0/. (VIA HTTPS://WWW.GBIF.ORG/OCCURRENCE/4416893806.)




Life on Earth runs on a 24-hour cycle as the planet turns. Animals and plants have built-in circadian clocks that synchronize metabolism and behavior to this daily cycle. But one beetle is out of sync with the rest of nature.

A new study, published Jan. 18 in Current Biology, looks at a beetle with a unique, 48-hour cycle. The large black chafer beetle, Holotrichia parallela, is an agricultural pest in Asia. Every other night, the female beetles emerge from the soil, climb up a host plant and release pheromones to attract males.

This mating behavior by the female beetles is under the control of a 48-hour, or “circa-bi-dian” clock, for reasons that remain mysterious. A team led by Walter Leal, professor of molecular and cellular biology at the University of California, Davis, and Jiao Yin at the Chinese Academy of Agricultural Sciences, Beijing, wanted to know if the male beetles’ ability to smell the females was also on a 48-hour clock.

Leal’s lab at UC Davis studies chemical sensing in insects. Many insects, from moths to mosquitoes, use scent to attract a mate. Insects “smell” with their antennae, which contain specialized receptors that react to specific chemicals wafting through the air.

Following pheromones

The team’s first step was to identify the gene in large black chafers for the receptor that reacts to the female pheromone, which has the seductive name L-isoleucine methyl ester, or LIME. The researchers initially cloned 14 candidate genes. A series of experiments led them to a gene called HparOR14 as the sex pheromone receptor — incidentally, the first such to be identified in a beetle species.

Having identified the receptor gene, they could measure levels of HparOR14 gene transcripts throughout the beetle’s life and its activity over 48 hours. They found that on “date night,” when females would be climbing plants to release scent, HparOR14 transcription was higher after dark. But receptor activity was low on the alternating days. (In a control experiment, the response to a chemical signal from damaged leaves, indicating food for the beetle, remained constant day after day.)

The results show that male chafer’s ability to detect the female sex pheromone does run on a 48-hour, circabidian cycle that matches the female mating behavior.

Why, and how, large black chafers have these 48-hour cycles is unknown. Circadian, 24-hour clocks are synchronized by cues that change over a 24-hour cycle — the most obvious being the rising or setting of the sun. But there are no 48-hour cues in nature, so exactly how the circabidian cycles of large black chafers are set — including how males and females can synchronize with each other, so they all know which night is date night — is a mystery still to be solved.

“Twenty-four hour rhythms in physiology and behavior are commonly observed in organisms from bacteria to humans, but observations of 48-hour rhythms in nature are rare,” said Professor Joanna Chiu, chair of the Department of Entomology and Nematology at UC Davis and an expert on circadian rhythms, who was not involved in the work. “This elegant study by Professor Leal and his collaborators has provided us with an in-depth description of how the circabidian rhythm of pheromone detection in this beetle is generated.”

Additional authors on the study are: Yinliang Wang, Huanhuan Dong, Yafei Qu, Jianhui Qin, Kebin Li, Yazhong Cao and Shuai Zhang, Chinese Academy of Agricultural Sciences, Beijing; Yuxin Zhou and Bingzhong Ren, Northeast Normal University, Changchun, China; and Chen Luo, Beijing Academy of Agriculture and Forestry Sciences. The work was supported by the National Key R&D Foundation of China; National Natural Science Foundation, China; and the Natural Science Foundation of Beijing.





MENTAL HEALTH

Don’t look back: The aftermath of a distressing event is more memorable than the lead-up, study suggests


The moments that follow a distressing episode are more memorable than the moments leading up to it.


 NEWS RELEASE 

BECKMAN INSTITUTE FOR ADVANCED SCIENCE AND TECHNOLOGY

Paul Bogdan (left) and Sanda and Florin Dolcos. 

IMAGE: 

PAUL BOGDAN (LEFT) AND SANDA AND FLORIN DOLCOS.

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CREDIT: PHOTO BY L. BRIAN STAUFFER.





Halfway through a true crime podcast, a morning commuter jerks the wheel to narrowly avoid a collision. When discussing the podcast with a coworker later that day, the driver can easily recall the details of the episode’s second half but retains only a blurry recollection of how it began.

A new study from psychologists at the Beckman Institute for Advanced Science and Technology suggests that we remember the moments immediately following a distressing episode more sharply than the moments leading up to it. Clarifying the relationship between trauma and memory can improve how we evaluate eyewitness testimonies, inform therapies to treat PTSD, and help clinicians combat memory decline in brain disorders like Alzheimer’s disease.

This study appears in the journal Cognition and Emotion.

“It’s a clean finding, and it opens up an entirely new dimension for understanding emotion’s impacts on memory,” said lead author Paul Bogdan, whose Ph.D. research at the University of Illinois Urbana-Champaign formed the basis for this study.

Bogdan’s research was conducted within the Dolcos Lab headed by psychology professors Florin Dolcos and Sanda Dolcos. For more than 15 years, the Dolcoses have studied the relationship between mental health and memory — specifically, unwanted memories that intrude into our daily lives, degrading mental health and aggravating anxiety, depression, and PTSD. The result of their research is an emotional security system, crafted with cognitive therapies that protect emotional security and preserve focus in the face of troublesome recollections.

Studying traumatic memories is tricky, the researchers say, because our brains tend to auto-edit negative experiences. Big ideas trump details, peripheral features concede to central ones, and specific moments are cut loose from their context: the where, when, and “what else,” Florin Dolcos said.

So far, there is little evidence to explain how negative emotion impacts the when: our ability to situate a sequence of memories along a timeline.

“Suppose your partner unexpectedly insults you in the middle of an otherwise neutral discussion. Later, when you are trying to make sense of the encounter …, will you more accurately remember what happened before or after the insult?” Bogdan said. “Existing research does not give us a clear answer.”

But Bogdan’s new research might. His team orchestrated two identical experiments: an initial study of 72 participants to pin down their procedures and predictions, and a replication study with 150 participants to confirm the results.

First, participants viewed a series of images simulating a string of memories. Half of the images elicited negative emotional responses, and half were emotionally neutral. To contextualize the images — and make them more memory-like — the participants were asked to privately imagine themselves traveling among the locations pictured and to craft a creative story arc to bind them together. This “promoted the feeling that pairs of sequential images are meaningfully related,” the researchers wrote.

An hour later, participants viewed pairs of images from the series. For each pair, they were asked whether the second picture occurred immediately before or immediately after the first. (They were also offered a “neither” option and could indicate if they did not remember the order.)

Results were consistent across both studies. The participants’ ability to accurately place the second image improved when the negative memories occurred before the neutral ones on the timeline. If participants were shown a negative image first, they did a better job of recalling neutral images that followed it; inversely, if participants were first shown a neutral image, they could more consistently place the negative images that came before.

In other words, memory flows from negative to neutral.

“So, our results suggest that if insulted in a conversation, one would better retrieve what was said immediately afterward than what was said immediately beforehand,” Bogdan said.

This is unintuitive, the researchers say.

“You might imagine that humans evolved to have a good memory for what led to negative things,” Bogdan said. “If you got bit by a snake, what foolhardy thing were you doing beforehand?”

One explanation is that negative emotional spikes (for example, upon sustaining a snake bite) cause a rush of focus and alertness, telling our brains to take exhaustive notes about what happens next and squirrel them away for future use.

But the prelude to trauma employs a much less diligent notetaker. This casts a dubious eye on scenarios like witness testimonies, where contextual details are paramount.

“Knowing that people are more likely to miss details leading to something negative that happened, we can be more cautious about statements related to events that have led to a crime, compared to memories of what happened after, which we know will be sharper,” Florin Dolcos said.

As relevant in a clinic as it is in a courtroom, these results help clarify the mechanisms behind PTSD, where an objectively neutral activity can trigger an involuntary surge of negative emotions.

“For example, a war veteran hearing a loud noise and inferring that their building will soon collapse due to an explosion,” Florin Dolcos said. “This happens because there is a rupture between the memory of the traumatic experience and its original context: the what breaks from the where and the when.”

Taking back control over traumatic memories, then, requires reattaching them to their context — their original place and time. The researchers hope to incorporate this strategy into cognitive therapies for people with PTSD.

In addition to muting the maelstrom of negative memories, another therapeutic avenue may entail using positive emotions to reconstruct sturdier, sharper memories for those who need them, according to Sanda Dolcos.

“As people age, problems with memories become more serious, especially conditions like Alzheimer’s,” she said. “The memory for context suffers the most. If we know exactly what’s happening, we can build future strategies to better encode information that will help us help others with those conditions.”


Editor’s note

The paper titled “Emotional dissociations in temporal associations: opposing effects of arousal on memory for details surrounding unpleasant events” is available online here: https://doi.org/10.1080/02699931.2023.2270196

For full author information, please consult the publication.

Bogdan recently defended his Ph.D. thesis and will soon begin a postdoctoral research position at Duke University. Florin Dolcos is also a professor of biomedical and translational sciences, and both Florin and Sanda Dolcos are affiliates of the Center for Social and Behavioral Science.





Repeated sexual failures cause social stress in fruit flies


Rejected males experience frustration that impairs their ability to cope with other stresses


Peer-Reviewed Publication

PLOS





Repeated failures to reproduce make fruit flies stressed and frustrated, which in turn makes them less resilient to other types of stress, Julia Ryvkin at Bar-Ilan University and colleagues report in the open-access journal PLOS Genetics, publishing January 18.

Animals are motivated to take actions that improve their survival and reproduction through reward systems in the brain, but failure causes stress. The reward systems have been extensively studied, but less attention has been paid to how animals respond to failure. To investigate, researchers compared the behaviour of male fruit flies (Drosophila melanogaster) that had experienced repeated sexual rejection, with males that had recently mated and naïve males that had been kept in isolation. They found that rejected males were more active, more aggressive, and less social towards other males — indicating a frustration-like state of stress. Rejected males were also less resilient to two other types of stress: starvation and exposure to a toxic herbicide that causes oxidative damage. To understand how this stress response is controlled in the brain, the researchers manipulated the signaling system of neuropeptide F, which is involved in reward processing and aggression. Inhibiting neuropeptide F receptors made flies less resilient against starvation, mimicking the effects of repeated sexual rejection. Using a technique called optogenetics, which uses light to stimulate activity in specific cells, the team activated neuropeptide F receptor neurons and found that this also reduced the flies’ ability to withstand starvation.

These results show for the first time that fruit flies experience social stress when their attempts to mate repeatedly fail. The response is mediated by a brain signaling system involving neuropeptide F, which also plays a role in reward- and stress-responses in other organisms. This offers an opportunity to further investigate social stress in a model organism with a simple nervous system, the authors say.

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In your coverage, please use this URL to provide access to the freely available article in PLOS Genetics:

http://journals.plos.org/plosgenetics/article?id=10.1371/journal.pgen.1011054

Citation: Ryvkin J, Omesi L, Kim Y-K, Levi M, Pozeilov H, Barak-Buchris L, et al. (2024) Failure to mate enhances investment in behaviors that may promote mating reward and impairs the ability to cope with stressors via a subpopulation of Neuropeptide F receptor neurons. PLoS Genet 20(1): e1011054. https://doi.org/10.1371/journal.pgen.1011054

Author Countries: Israel, US

Funding: This work was supported by the Israel Science Foundation Grants (384/14 and 174/19 to GSO). The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.

 


Household income and health insurance among factors in decision to withdraw life support after hemorrhagic stroke


Peer-Reviewed Publication

NYU LANGONE HEALTH / NYU GROSSMAN SCHOOL OF MEDICINE





Living in a high-income neighborhood, having private health insurance, and being older are tied to an increased likelihood that life support will be withdrawn for people who have suffered severe bleeding in the brain, a new study shows.

Led by researchers at NYU Grossman School of Medicine, the study focused on the social and economic factors linked to the withdrawal of life support and related death after being hospitalized for intracerebral hemorrhages. Such bleeds, sometimes referred to as hemorrhagic stroke, often lead to swelling in the brain, which can put a patient into a coma and frequently cause death.

Previous studies had identified racial and religious disparities in death rates after such hemorrhages, with higher rates seen among Black and Hispanic patients and patients with deeply held religious beliefs.

The study authors say their new work, published in the journal Neurology online Jan. 18, is important because it offers a better understanding of disparities that may help physicians to tailor end-of-life conversations with patients’ families, with the goal of removing age, racial, and economic disparities in health care.

Unlike ischemic stroke, which is caused by blocked blood vessels that can be cleared in many cases, hemorrhagic strokes are more often deadly. Some hemorrhagic stroke patients may undergo surgery to minimize the effects of swelling. In most cases, however, recovery is limited, and many patients need life-sustaining assistance with breathing and feeding. For these reasons, many patients and their families choose to withdraw life support.

For the new study, researchers examined the medical records of 868 patients admitted to three NYU Langone Health hospitals in Manhattan, Brooklyn, and Long Island for intracerebral hemorrhage from 2017 through 2022. Most were seniors and men of all races, with half relying on Medicare and one in five on Medicaid. While many survived their severe brain bleed and were discharged home or to a rehabilitation or nursing facility, 148 did not, and most of the decedents (84%) had had their life support, including ventilators and feeding tubes, withdrawn during their hospital stay.

The researchers found that hemorrhagic stroke patients living in city neighborhoods with higher incomes (i.e., above a yearly median of $88,687) were as much as 88% more likely to have life support withdrawn and to die subsequently than those living in poorer parts of the city (i.e., with yearly median incomes below $70,784). Being older than age 77 and on Medicare also heightened chances of having life support ended.

By contrast, being Black and having private insurance were factors tied to a lower likelihood of life support being withdrawn. Among hospitalized hemorrhagic stroke patients, Blacks made up 7% of those who had life support withdrawn but counted for 18% of those who maintained life support. Similarly, while 37% had private health insurance, only 20% of those who decided to withdraw life support had private insurance.

Among the other study findings, Christians, especially Catholics, were 10% more likely to have life support withdrawn poststroke than maintained, and Jewish patients were 15% more likely to have life support maintained than withdrawn.

“Our study results highlight the many complex social, economic, religious, and racial factors that may play a role in decision making after a patient has suffered a severe bleed in the brain, or hemorrhagic stroke, and dies after withdrawal of life support,” said study lead investigator and neurologist Kara Melmed, MD.

Melmed, a clinical assistant professor in the Departments of Neurology and Neurosurgery at NYU Langone, says that while it has long been known that socioeconomic factors play a role in health and how well people recover, the role of these factors, beyond religion and race, have not until now been explored in detail for patients with intracerebral hemorrhages.

Further research is needed, the researchers say, because death is far more common in hemorrhagic stroke than in ischemic stroke.

Strokes of all kinds in the United States are not only a leading cause of death, but are also a health care disparity concern because strokes are twice as common in Blacks than in non-Blacks.

“Knowing that socioeconomic factors, especially income, play a role in hemorrhagic stroke outcomes is the first step in comprehending why these imbalances exist and how best to address them to make health care more equitable,” said senior study investigator and neurologist Jennifer Frontera, MD.

“Seeing any kind of disparity in health care is concerning,” said Frontera, a professor in the Department of Neurology at NYU Langone. “Clinicians in future may need to tailor end-of-life care discussions, taking into account cultural and social factors when treating patients who have suffered an intracerebral hemorrhage and, in particular, with respect to withdrawing life support.”

Besides Melmed and Frontera, other researchers at NYU Langone involved in this study, which was self-funded by the health system, are Ariane Lewis, MD; Lindsey Kuohn, MD; Joanna Marmo, BSN, RN, SCRN; Nirmala Rossan-Raghunath, MSN, SCRN; Jose Torres, MD; Rajanandini Muralidharan, MD; Aaron Lord, MD; and Koto Ishida, MD.