Daily Archives: 16 July 2024

Embracing a Healthy Lifestyle Could Mitigate Life-Shortening Gene Effects by Over 60%

While genes and lifestyle interact to influence lifespan, it’s crucial to note that an unhealthy lifestyle can independently elevate the risk of premature death by a staggering 78%, regardless of genetic predisposition. This striking finding from recent research, which utilised a polygenic risk score (PRS) to assess genetic predisposition across 353,742 adults from the UK Biobank, tracked from 2006 to 2021, underscores the urgent need for healthier habits. Lifestyle factors such as tobacco use, alcohol consumption, diet, sleep, and physical activity were also evaluated in the study.

The findings suggest that individuals genetically predisposed to a shorter lifespan faced a 21% higher risk of early death compared to those with genetic advantages for longevity, regardless of lifestyle choices. Similarly, those with unfavourable lifestyles were 78% more likely to die prematurely than their counterparts with healthier habits, independent of genetic factors. Those at high genetic risk and with unhealthy lifestyles were twice as likely to die early compared to those with low genetic risk and healthy lifestyles.

The study identified four critical components of an optimal lifestyle: non-smoking, regular physical activity, sufficient sleep, and a healthy diet. These factors collectively contributed to mitigating genetic predispositions to shorter lifespans by approximately 62%. Importantly, the study found that individuals at high genetic risk could extend their life expectancy by up to 5.5 years at age 40 by adopting a healthy lifestyle. This positive message underscores the potential for positive change and encourages individuals to make healthier choices.

The researchers acknowledge limitations, including the study’s observational nature, which precludes definitive cause-and-effect conclusions. Lifestyle assessments were conducted only once, and the study population consisted predominantly of individuals of European ancestry, which may limit generalisability. Despite these constraints, the findings underscore the critical role of healthy lifestyles in offsetting genetic risks for lifespan reduction.

The study emphasises the importance of public health policies promoting healthy lifestyles as complements to conventional healthcare. By encouraging healthy habits earlier in life, these policies could mitigate the impact of genetic factors on lifespan and promote longer, healthier lives.

More information: Zilong Bian et al, Genetic predisposition, modifiable lifestyles, and their joint effects on human lifespan: evidence from multiple cohort studies, BMJ Evidence-Based Medicine. DOI: 10.1136/bmjebm-2023-112583

Journal information: BMJ Evidence-Based Medicine Provided by BMJ Group

Improving Detection of Home Falls Among Older Adults: Researchers Make Breakthrough

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Recent research from Binghamton University, State University of New York, focuses on enhancing response times through a human action recognition (HAR) algorithm. This algorithm uses local computing devices to analyse sensor data and detect unusual movements without needing external processing centres. Developed by Professor Yu Chen and PhD student Han Sun from the Thomas J. Watson College of Engineering and Applied Science’s Department of Electrical and Computer Engineering, the Rapid Response Elderly Safety Monitoring (RESAM) system leverages advancements in edge computing.

Published in the IEEE Transactions on Neural Systems and Rehabilitation Engineering, their study demonstrates that RESAM achieves 99% accuracy with a response time of just 1.22 seconds when deployed on standard devices like smartphones, smartwatches, laptops, or desktop computers. This places RESAM among the most precise methods available today for detecting falls among older adults.

Chen emphasises the significance of this research for an often-overlooked demographic: senior citizens who may lack the resources to voice their technological needs. He contrasts typical high-tech innovations with the practical benefits of RESAM, which utilises familiar devices instead of requiring a complete “smart home” setup, empowering older adults without adopting new technology.

To address privacy concerns, RESAM employs a privacy-preserving approach by reducing monitored images to skeletal representations. This technique enables the system to analyse critical body points such as arms, legs, and torso to detect falls or other incidents that could lead to injuries while respecting users’ privacy preferences.

Recognising that bathrooms pose a high risk for falls but are sensitive areas for surveillance, Chen highlights the reluctance towards camera-based monitoring in such private spaces. Instead, he envisions RESAM as a foundational component of a broader initiative termed “Happy Home,” which integrates thermal or infrared cameras and additional sensors to remotely assess various aspects of a person’s environment and well-being.

Looking ahead, Chen and Associate Professor Shiqi Zhang from the Department of Computer Science explore expanding RESAM to include robotic companions, such as a robot dog. This “pet” could accompany individuals through daily routines, offering personalised monitoring and assistance. Zhang’s earlier work demonstrated how a robot dog could guide visually impaired individuals, underscoring the potential for interactive and adaptive monitoring systems in home environments.

Chen envisions these advancements not only as technical innovations but as supportive companions that enhance the safety and independence of older adults. Integrating intelligent sensors and robotic assistants into daily life, the “Happy Home” concept aims to proactively monitor health indicators and predict potential issues before they escalate, promoting a safer and more supportive living environment for older adults.

More information: Han Sun et al, A Rapid Response System for Elderly Safety Monitoring Using Progressive Hierarchical Action Recognition, IEEE Transactions on Neural Systems and Rehabilitation Engineering. DOI: 10.1109/TNSRE.2024.3409197

Journal information: IEEE Transactions on Neural Systems and Rehabilitation Engineering Provided by Binghamton University

After a Quarter Century, Researchers Identify Genetic Basis of Rare Neurological Disorder

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In some families, Spinocerebellar Ataxia 4 (SCA4) is seen as a test of faith, while for others, it is viewed as a curse. This progressive neurological condition is scarcescarce but exerts severe effects on patients and their families. Typically, the initial symptoms manifest as difficulties with walking and balance, worsening progressively. Onset usually occurs in one’s forties or fifties, though it can begin as early as the late teens. Currently, there is no known cure, and until recently, its underlying cause remained elusive.

After 25 years of uncertainty, a multinational research effort led by Stefan Pulst, M.D., and K. Pattie Figueroa from the University of Utah’s Spencer Fox Eccles School of Medicine has finally identified the genetic mutation responsible for SCA4. Published in Nature Genetics, their findings provide much-needed answers to affected families and pave the way for potential future treatments. The inheritance pattern of SCA4 strongly suggested a genetic origin, with previous studies pinpointing the responsible gene to a specific region on a chromosome. However, this region posed significant challenges for analysis due to its complex structure, which was filled with repetitive DNA segments that resemble portions of other chromosomes and possessed an unusual chemical composition that thwarted conventional genetic testing methods.

Pulst, Figueroa, and their team used cutting-edge sequencing technology to compare DNA samples from affected individuals within several Utah families to unaffected counterparts. They discovered that SCA4 patients exhibit an abnormally elongated segment within a gene called ZFHX3, containing an extended repeat of repetitive DNA. In laboratory tests using isolated human cells carrying this extended version of ZFHX3, researchers observed impaired protein recycling mechanisms and the accumulation of protein aggregates, indicating cellular dysfunction. Interestingly, similarities in protein recycling dysfunction have been observed in another type of ataxia, SCA2. Current clinical trials testing therapies for SCA2 suggest that treatments targeting this pathway may also benefit SCA4 patients.

Understanding the genetic basis of SCA4 is crucial for developing more effective treatments, notes Pulst, emphasizing that targeting the underlying cause offers the best chance to improve patients’ lives. While the journey towards viable treatments may be lengthy, simply identifying the genetic basis of SCA4 holds immense value for affected families. Figueroa underscores this point, highlighting that genetic testing can now provide definitive answers to families considering their future, including decisions related to family planning. The researchers express deep gratitude to the SCA4 patients and their families whose contributions of biological samples and family histories were essential for this breakthrough.

Through their generosity, researchers traced the disease’s origins in Utah to a pioneer couple who settled in Salt Lake Valley in the 1840s. Figueroa reflects on the personal impact of studying SCA4 since 2010, recalling how interactions with affected families transformed her perspective. “These are not just research subjects; they are individuals whose lives are profoundly affected. This work is more than science; it’s about understanding and supporting real people,” she affirms. In summary, identifying the genetic mutation causing SCA4 represents a significant step forward in scientific understanding and potential treatment development.

By unravelling this genetic mystery, researchers have brought hope to affected families and underscored the importance of community collaboration in advancing medical research and support.

More information: Karla P. Figueroa et al, A GGC-repeat expansion in ZFHX3 encoding polyglycine causes spinocerebellar ataxia type 4 and impairs autophagy, Nature Genetics. DOI: 10.1038/s41588-024-01719-5

Journal information: Nature Genetics Provided by University of Utah Health

Residing Close to Green Spaces Linked to Reduced Emotional Issues in Preschool-Age Children, NIH Study Reveals

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Children who grow up in environments rich with natural spaces such as forests, parks, and backyards may experience fewer emotional issues during their early years, according to a groundbreaking study funded by the NIH Environmental Influences on Child Health Outcomes (ECHO) program. Published in JAMA Network Open, the research fills a critical gap in understanding the impact of nature on young children’s mental health, providing a wealth of new insights for parents, educators, policymakers, and researchers.

The study, led by meticulous researchers from the Frank Porter Graham Child Development Institute at the University of North Carolina, Chapel Hill, analysed data from over 2,100 children aged 2 to 11 across 199 counties in 41 U.S. states. They combined parental reports on children’s behaviour with satellite-derived data on vegetation density around their homes, ensuring a comprehensive and reliable analysis.

Findings indicated that higher levels of green space within three-fourths of a mile from a child’s residence were associated with reduced anxiety and depression symptoms between the ages of 2 and 5. This association remained significant even after accounting for the child’s sex, parental education, and neighbourhood socioeconomic status. However, no significant correlation was found between green space and mental health symptoms in later childhood (ages 6 to 11), when children typically spend more time at school.

Dr. Nissa Towe-Goodman, an ECHO researcher involved in the study, emphasised the importance of early childhood exposure to natural environments, affirming that such experiences can positively impact children’s emotional well-being. She highlighted the nationwide scope of the study, contrasting it with previous research that often focused on limited geographic areas or adult populations.

Using the Normalised Difference Vegetation Index (NDVI) to quantify vegetation density, the study found that areas with higher NDVI values (indicative of dense vegetation like forests) were particularly beneficial. This metric allowed researchers to objectively measure the presence of natural environments around children’s homes and assess its impact on their mental health outcomes.

Looking forward, Dr. Towe-Goodman suggested further exploration into specific nature experiences that benefit children’s mental health. She also proposed studying how creating and preserving natural areas around homes and schools could enhance emotional well-being in early childhood, underscoring the potential public health implications of integrating green spaces into urban planning and educational environments.

The study underscores the positive influence of early exposure to green spaces on reducing anxiety and depression symptoms in young children. It highlights the potential for policies and initiatives that promote access to natural environments during crucial developmental stages. This promising outlook could pave the way for a brighter future for children’s mental health.

More information: Nissa Towe-Goodman et al, Green Space and Internalizing or Externalizing Symptoms Among Children, JAMA Network Open. DOI: 10.1001/jamanetworkopen.2024.5742

Journal information: JAMA Network Open Provided by Environmental influences on Child Health Outcomes