Monthly Archives: October 2024

Regular Consumption of Soda, Fruit Drinks, and Excessive Coffee Associated with Increased Stroke Risk

New global research co-led by the University of Galway, in collaboration with McMaster University Canada and an international network of stroke researchers, has revealed that regular consumption of fizzy drinks or fruit juice is linked with an increased risk of stroke, as is drinking more than four cups of coffee per day. These findings are part of the INTERSTROKE research project, with results published in the Journal of Stroke and the International Journal of Stroke. The research involved nearly 27,000 participants across 27 countries, including almost 13,500 who experienced their first stroke. This diverse cohort included individuals from various geographical and ethnic backgrounds and with different cardiovascular risk profiles from countries including Ireland and the UK.

The research highlighted significant risks associated with certain beverages. Consumption of fizzy drinks, including sugar-sweetened and artificially sweetened varieties, was connected to a 22% increase in stroke risk, which sharply rose with the intake of two or more such drinks daily. This association was influential in Eastern/Central Europe, the Middle East, Africa, and South America. The study also pointed out that many commercially available fruit juices, often made from concentrates with added sugars and preservatives, might negate the benefits of fresh fruit and even heighten stroke risk.

In terms of fruit juice consumption, the data showed a 37% increased risk of stroke due to bleeding (intracranial haemorrhage) with regular consumption of such drinks, with the risk tripling when consuming two drinks daily. Women exhibited the highest increase in stroke risk due to bleeding associated with these beverages. In contrast, drinking more than seven cups of water daily was linked to reduced odds of stroke caused by a clot, emphasising the benefits of simple water intake over sugary or caffeinated drinks.

The study also explored the effects of coffee and tea consumption on stroke risk. It found that drinking more than four cups of coffee daily raised the risk of stroke by 37%, although lower coffee consumption did not pose the same risk. Conversely, tea drinking was generally associated with a reduced risk of stroke, showing an 18-20% decrease in risk. Drinking 3-4 cups per day of black tea, including varieties like Breakfast and Earl Grey (but not green or herbal teas), was linked with a 29% lower risk of stroke.

However, the beneficial effects of tea could be nullified by adding milk, as this could inhibit the antioxidants in tea that contribute to its protective effects against stroke. The research also highlighted significant geographical differences in how tea consumption affected stroke risk, with a reduced risk noted in regions like China and South America. In contrast, a higher risk was observed in South Asia.

Lead researcher Professor Andrew Smyth, Clinical Epidemiology at the University of Galway and Consultant Physician at Galway University Hospitals, advises caution with fruit and fizzy beverages. He recommends avoiding or minimising consumption of such drinks and suggests switching to water to mitigate stroke risk. Smyth’s findings stress the importance of understanding the health implications of our beverage choices, enlightening us about the significant impact these choices can have on our cardiovascular health.

More information: Andrew Smyth et al, Carbonated Beverage, Fruit Drink, and Water Consumption and Risk of Acute Stroke: the INTERSTROKE Case-Control Study, Journal of Stroke. DOI: 10.5853/jos.2024.01543

Journal information: Journal of Stroke Provided by University of Galway

Modelling Study in The Lancet Public Health Suggests That Accelerating Efforts to Eliminate Tobacco Smoking Could Raise Life Expectancy and Prevent Millions of Premature Deaths by 2050

Leave a Reply

A recent study published in The Lancet Public Health journal by the Global Burden of Disease, Injuries and Risk Factors (GBD) Tobacco Forecasting Collaborators suggests that intensifying efforts to reduce global tobacco smoking to a prevalence of 5% could significantly enhance life expectancy and avert millions of premature deaths by 2050. This comprehensive analysis underscores the potential health benefits arising from hastening the decline in smoking rates over the next thirty years.

The findings indicate that if tobacco smoking rates were to decrease gradually from current levels to 5% by 2050, life expectancy could increase by an additional year for males and 0.2 years for females. In a more ambitious scenario where smoking is wholly eradicated starting from 2023, the potential increase in life expectancy rises to 1.5 years for males and 0.4 years for females by 2050. Under both scenarios, a significant reduction in premature deaths is projected.

Tobacco smoking remains one of the principal risk factors for preventable death and illness worldwide, responsible for over one-tenth of all deaths in 2021. Despite a noticeable reduction in smoking rates over the past three decades, the pace of decline has not been uniform and has slowed in several countries. Diseases such as cancers, ischemic heart disease, and chronic obstructive pulmonary disease (COPD) continue to lead as the primary causes of smoking-related premature deaths, collectively accounting for 85% of potentially preventable years of life lost (YLLs).

Various nations have set ambitious objectives to slash smoking rates below 5% in upcoming years. Yet, a substantial opportunity remains to broaden and bolster proven policy measures and interventions to meet these targets. Professor Stein Emil Vollset from the Institute for Health Metrics and Evaluation (IHME), the study’s senior author, emphasises the critical importance of maintaining momentum in global efforts to reduce and eventually eliminate smoking. He points out that millions of premature deaths could be prevented by ending smoking.

The research utilised IHME’s Future Health Scenarios platform, which draws on data from the GBD study to provide detailed health burden forecasts for 204 countries, segmented by age and gender, from 2022 to 2050. This study is the first to comprehensively project the health impacts of smoking across all countries and causes, as well as across 365 different diseases and injuries. YLLs, a key measure of premature deaths that counts each death against the potential life expectancy at the age of death, was the primary metric used in this study.

Three future scenarios were examined: a most likely scenario based on current trends, an optimistic scenario assuming a reduction of smoking prevalence to 5%, and an ideal scenario where smoking is eliminated starting in 2023. The differences between the reference and elimination scenarios allowed researchers to assess the total future health burden that could be avoided with robust anti-smoking measures.

The study’s projections are based on past trends showing a decline in age-standardised smoking rates from 1990 to 2022, with a prediction of continued but slower decline towards 2050. Despite regional variations, the results suggest significant health improvements could be achieved by accelerating anti-smoking efforts.

However, the study acknowledges certain limitations. It estimates only the direct effects of smoking reduction on health. It does not consider the broader health benefits of reduced second-hand smoke exposure or the impacts of emerging products like e-cigarettes. Furthermore, the projections do not account for potential advances in healthcare, such as improvements in lung cancer detection and treatment, which could further influence the outcomes.

In conclusion, this comprehensive analysis highlights the critical need for sustained and intensified global efforts to curb smoking. It underscores the considerable health gains that could be achieved by meeting and exceeding current reduction targets. Such efforts are crucial for extending life expectancy and significantly reducing the burden of disease worldwide.

More information: Tobacco Forecasting Collaborators, Forecasting the effects of smoking prevalence scenarios on years of life lost and life expectancy from 2022 to 2050: a systematic analysis for the Global Burden of Disease Study 2021, The Lancet Public Health. DOI: 10.1016/S2468-2667(24)00166-X

Journal information: The Lancet Public Health Provided by The Lancet

Age Is Merely a Digit

Leave a Reply

As we journey through life, our methods to handle our finances and make decisions about them evolve. It’s been observed in past studies that older adults may sometimes be more inclined to take risks compared to their younger counterparts when faced with financial choices. But what cognitive mechanisms drive these age-related shifts in risk tolerance? It is often suggested that a decline in mental abilities makes us less capable of managing risky or complex financial decisions as we age. However, does this decline truly drive the observed differences in risk-taking behaviour? And what implications does this have for our understanding of intelligence? A recent study titled “Older adults select different but not simpler strategies than younger adults in risky choices,” by Florian Bolenz and Thorsten Pachur from the Science of Intelligence (SCIoI) in Berlin, published in PLOS Computational Biology, proposes a different perspective. This research indicates that older adults employ decision-making strategies as complex as younger adults, albeit reflecting different risk appetites and motivations.

Revisiting cognitive ageing with a fresh lens, the study introduces a new computational model based on resource-rational strategy selection to analyse data from 122 participants, divided between younger adults (aged 18-30) and older adults (aged 63-88), across 105 risky scenarios. This model elucidates decision-making by weighing the mental effort involved against the payoff of a strategy, influenced by an individual’s preference for simplicity over reward. This study’s simulation of decision-making patterns contradicts the assumption that older adults tend towards more straightforward strategies. Interestingly, younger adults often adopt the “minimax heuristic,” a strategy aimed at minimising potential losses, essentially playing it safe to dodge the worst-case scenarios while potentially forgoing higher gains.

In contrast, some older adults favour the “maximax heuristic,” which prioritises maximising the potential for the best outcome over avoiding losses. This suggests that older individuals might be more prepared to pursue higher rewards despite more significant risks, depending on their personal goals and life circumstances. For example, consider Taylor, aged 30, who starts a local café focusing on stable income and low financial risk. On the other hand, Morgan aged 64, might choose to invest in a volatile global tech start-up driven by the possibility of substantial returns. Both individuals make calculated decisions, seeking greater rewards based on what they value most. This demonstrates that older adults’ decision-making is influenced by motivations that are no less complex than those of younger people.

Moreover, the study highlights the significant role of emotions in decision-making. The researchers incorporated cognitive and motivational aspects into their model. They discovered that older adults, typically experiencing fewer negative emotions than younger ones, adopt less risk-averse strategies under certain conditions. Analysis indicated that nearly 30% of the differences in decision-making between age groups could be attributed directly to changes in emotional responses. This finding suggests that it is not cognitive decline but shifts in emotional and motivational factors that lead older adults to approach risk differently.

For instance, when an older adult considers investing in a grandchild’s startup, they might focus more on the potential benefits and the satisfaction of supporting the family, driven by positive emotions and long-term goals, rather than strictly weighing the financial risks. Recognising that older adults use different but not necessarily more straightforward strategies can inform the creation of better support systems and public policies, such as personalised health information or tailored retirement planning systems, which could significantly improve decision-making processes for older adults, offering hope for a more secure financial future.

Finally, this study also contributes to the broader field of intelligence research by challenging the stereotype that cognitive decline in older adults results in simpler decision-making when it comes to risk. Instead, it highlights the adaptability and resilience of cognitive processes, showing that older adults are capable of employing sophisticated strategies. By exploring the interplay between cognitive and motivational factors, the research offers new insights into the nature of intelligence throughout life, providing valuable information that significantly enhances our understanding of intelligent decision-making.

More information: Florian Bolenz et al, Older adults select different but not simpler strategies than younger adults in risky choice, PLoS Computational Biology. DOI: 10.1371/journal.pcbi.1012204

Journal information: PLoS Computational Biology Provided by Technische Universität Berlin – Science of Intelligence

Recent Study Provides Optimism in Combating Age-Related Vision Loss

Leave a Reply

Age-related macular degeneration (AMD) is a prominent cause of irreversible vision loss in the United States. Current treatments, while available, offer limited relief and are often accompanied by severe side effects. A groundbreaking study published in Developmental Cell now sheds light on the cellular underpinnings of AMD and opens up possible pathways for innovative treatments.

Dr. Ruchira Singh of the University of Rochester Flaum Eye Institute and Center for Visual Sciences, who spearheaded the research, highlights the limitations of existing AMD therapies. “The treatments currently available for AMD are only partially effective and can have considerable side effects,” she explained. “Our study is focused on uncovering new therapeutic targets that could arrest the progression of AMD and potentially revolutionise treatment approaches.”

To bypass the constraints of prior studies that relied on animal models, Singh’s team utilised human stem cells to create a more accurate model of AMD. This enabled them to examine genes linked to AMD and less common, inherited macular dystrophies. Their research identified a critical protein pivotal in the initial stages of AMD development.

The retinal pigment epithelium (RPE) is integral to the eye’s health and is particularly implicated in AMD. Within the RPE, deposits of proteins and lipids, known as drusen, accumulate, often signalling the onset of AMD. The study pinpointed an overproduction of the protein tissue inhibitor of metalloproteinases 3 (TIMP3) in the RPE of those with AMD. This protein hinders the functioning of matrix metalloproteinase (MMP) enzymes, which are crucial for maintaining ocular health. The impairment of MMP activity, as found in the study, triggers an increase in another enzyme that fosters inflammation and drusen formation.

The researchers employed a novel approach: they used a small-molecule inhibitor to block the activity of the inflammation-promoting enzyme. This intervention successfully reduced drusen accumulation in their AMD model, suggesting that targeting this specific pathway could hold substantial promise for preventing the progression of AMD.

Dr. Singh emphasised the importance of the pathways involved in drusen formation in the progression of AMD. “If we can stop the accumulation of drusen, it might be possible to prevent the disease from advancing to a stage where significant vision loss is inevitable,” she said. “This study not only deepens our understanding of AMD but also presents a beacon of hope for developing therapies that could profoundly benefit the millions suffering from this condition.” This pioneering research marks a significant stride towards deciphering the complexities of AMD and paves the way for potential breakthroughs in treatment strategies that could vastly enhance patient outcomes.

More information: Sonal Dalvi et al, Human iPSC-based disease modeling studies identify a common mechanistic defect and potential therapies for AMD and related macular dystrophies, Developmental Cell. DOI: 10.1007/s00394-023-03123-x

Journal information: Developmental Cell Provided by University of Rochester Medical Center

Association Between Frailty and Prolonged Physical Deterioration in Cancer Survivors

Leave a Reply

A new research paper has been published in the journal Aging, also listed as “Aging (Albany NY)” on MEDLINE/PubMed and “Aging-US” by Web of Science. The article appeared in Volume 16, Issue 18 on September 26, 2024, under the title, “Frailty and Pre-frailty Associated with Long-term Diminished Physical Performance and Quality of Life in Breast Cancer and Hematopoietic Cell Transplant Survivors.” This study highlights the complex challenges survivors face of certain cancers as they age.

The abstract of the paper points out that physical frailty, which may signify accelerated ageing, is poorly characterized in individuals who have survived breast cancer (BC) and hematopoietic cell transplant (HCT). The research focuses on understanding how frailty impacts overall outcomes and the quality of life (QOL) of these survivors, areas which have previously been vaguely defined in medical literature.

The research was a collaborative effort involving numerous experts from the University of Minnesota in Minneapolis, Amgen in Thousand Oaks, CA, and Columbia University Medical Center in New York, NY. Researchers such as Najla El Jurdi, Hok Sreng Te, Qing Cao, Char Napurski, Shuo Wang, Andre Robinson, Mukta Arora, Heba ElHusseini, Fiona He, Laura J. Niedernhofer, Bharat Thyagarajan, Anna Prizment, Shernan Holtan, Anne Hudson Blaes, and Matthew J. Yousefzadeh contributed to this prospective analysis, aiming to evaluate the impact of frailty on quality of life and its link to the ageing biomarker, p16INK4a.

The study articulates the alarming prevalence of frailty among survivors, specifically those who have battled breast cancer and those who have undergone hematopoietic cell transplants. The researchers highlight that frailty has significant and detrimental effects on these individuals’ physical functioning, quality of life, and overall well-being. This observation underpins the study’s call for further research and intervention strategies to address these issues.

The study’s findings demonstrate a notable correlation between frailty and the senescence marker p16INK4a, even years after cancer treatments are completed. This link further emphasizes the necessity for well-designed senolytic trials targeting cancer survivors. Such trials could offer new avenues for improving this vulnerable population’s long-term health and quality of life, illustrating a crucial step forward in survivorship care.

More information: Najla El Jurdi et al, Frailty and pre-frailty associated with long-term diminished physical performance and quality of life in breast cancer and hematopoietic cell transplant survivors, Aging-US. DOI: 10.18632/aging.206109

Journal information: Aging-US Provided by Impact Journals LLC

New Psychological Research Reveals How Our Brains Segment the Day into Distinct Chapters

Leave a Reply

From the moment a person transitions from the street to step inside a restaurant, their brain marks the beginning of a new “chapter” in their day. This mental segmentation triggers significant changes in brain activity. This phenomenon occurs frequently as we navigate different settings — a casual lunch out, attending a child’s soccer match, or settling down for an evening in front of the television.

A recent study, a pioneering work in the field, published in the journal Current Biology investigates how our brains divide the day into discrete, comprehensible, and memorable events. The study, spearheaded by Christopher Baldassano, an associate professor of Psychology, and Alexandra De Soares, a former lab member, sheds light on this intriguing cognitive process.

The researchers sought to deepen our understanding of what instigates the brain to delineate these boundaries, thereby registering our daily experiences as distinct “chapters”. One theory posits that these divisions are primarily influenced by significant environmental changes, such as transitioning from an outdoor setting into a restaurant. Alternatively, the study explores whether these “chapters” could be shaped by internal narratives scripted by the brain based on past experiences, suggesting that even major environmental shifts might be overlooked if they do not align with our immediate priorities and goals.

To explore these theories, the research team designed an experiment involving 16 audio narratives, each lasting between three and four minutes. These narratives were set in various locations—a restaurant, an airport, a grocery store, and a lecture hall—and revolved around different social interactions, including a breakup, a marriage proposal, a business transaction, and a casual encounter.

The study revealed that the brain’s method of segmenting experiences highly depends on individual priorities and focus points. For instance, when subjects listened to a narrative about a marriage proposal in a restaurant, their prefrontal cortex typically organised the story around the proposal event, climaxing at the anticipated “yes.” However, when instructed to concentrate on different aspects of the narrative, such as the couple’s dinner orders, these mundane details transform into pivotal “chapters” of the narrative.

Christopher Baldassano highlighted an intention to challenge the notion that the brain passively responds to environmental changes without active involvement in crafting new cognitive chapters. The findings suggest that the brain is indeed actively engaged in structuring our life experiences into meaningful segments, a process that keeps us actively involved in our own memories.

This segmentation process was further analysed using MRI scans to track new brain activity and, alternatively, by instructing another group of participants to indicate when they perceived new story segments by pressing a button. It was observed that the brain segments narratives based on the instructed perspective, applicable across different scenarios, whether it involved a breakup at an airport or a business deal in a grocery store. The details that participants focused on significantly shaped their perception of new narrative chapters.

The researchers aim to continue exploring how expectations affect long-term memory retention. Preliminary tasks involved participants recounting what they remembered from each story, with ongoing analysis to understand how adopted perspectives during the narratives influence memory recall. This study is part of a broader effort to develop a comprehensive theory on how real-life experiences are segmented into event memories, emphasising the role of prior knowledge and expectations in this cognitive process. We invite you to stay connected with our ongoing research.

Baldassano views this work as a passion project. He points out the complexities involved in tracking brain activity patterns over time and utilising mathematical models alongside meaningful narratives to unveil new insights into cognitive processes. His enthusiasm for this unconventional approach underscores the innovative nature of the research conducted in his lab.

More information: Alexandra De Soares et al, Top-down attention shifts behavioral and neural event boundaries in narratives with overlapping event scripts, Current Biology. DOI: 10.1016/j.cub.2024.09.013

Journal information: Current Biology Provided by Columbia University

Face-to-Face Interaction Associated with Reduced Loneliness Among Elderly Adults

Leave a Reply

Direct interactions reduce loneliness among older individuals more effectively than remote communication, like phone calls, emails, or texts, according to research conducted by teams from the University of Texas at Austin and the University of Michigan. These findings, published today in The Journals of Gerontology: Series B Psychological Science, could significantly influence the health and well-being of many seniors.

Shiyang Zhang, a postdoctoral fellow in human development and family sciences at UT and co-author of the study, noted their team’s interest in understanding the behavioural responses of older adults to feelings of loneliness and the impact of various forms of social contact. “Our observations revealed that although older adults often resort to making phone calls when feeling isolated, only face-to-face interactions were effective in actually reducing the feelings of loneliness,” Zhang explained.

The importance of regular social interactions for mental and physical health is well-documented. They contribute to longer life spans in the elderly while reducing risks of heart disease, cognitive decline, and premature mortality; despite the challenges that chronic health issues and limited mobility pose, which may restrict face-to-face interactions, this research underscores the vital role that direct contact plays in comprehensive strategies to combat loneliness among the elderly.

Conducted in the Austin, Texas, area during 2016 and 2017—before the COVID-19 pandemic, which later amplified the reliance on digital communication and heightened isolation levels—the study engaged over 300 participants aged 65 and above. Participants were questioned every three waking hours about their feelings of loneliness and their recent social interactions, whether in-person, over the phone, or digital (including texting and social media).

The research also considered the strength of social bonds in these interactions, discovering that lonely older adults often reached out to close friends and family. Interestingly, it was found that even minimal in-person contact with merely an acquaintance could more effectively alleviate loneliness compared to more frequent phone conversations with closer contacts.

Zhang highlighted that while telephone and digital communications offer convenient ways for older adults to connect when they feel isolated, these methods must match direct interactions’ emotional support and comfort. “Telephone and digital connections fail to serve as adequate substitutes for the physical presence and reassurance that come with in-person contacts,” Zhang remarked, underscoring the unique value of physical presence in social interactions for reducing loneliness among older adults.

More information: Shiyang Zhang et al, Loneliness and Mode of Social Contact in Late Life, The Journals of Gerontology Series B. DOI: 10.1093/geronb/gbae115

Journal information: The Journals of Gerontology Series B Provided by University of Texas at Austin

Laughter Could Be as Beneficial as Eye Drops for Dry Eyes

Leave a Reply

“Laughter may be as effective as eye drops in treating symptoms of dry eye disease, according to findings from a clinical trial in China published by The BMJ. Researchers consider laughter exercise a potential initial treatment for relieving dry eye disease symptoms. Dry eye disease (DED) is a chronic condition affecting an estimated 360 million people worldwide, characterized by uncomfortable, red, scratchy, or irritated eyes. Studies have shown that laughter therapy can alleviate conditions like depression, anxiety, stress, and chronic pain, enhance immune function, and is acknowledged as a valuable complementary treatment for a range of chronic conditions, including mental health disorders, cancer, and diabetes. However, the specific impact of laughter therapy on dry eye disease has yet to be fully understood.

To delve deeper into this potential therapy, researchers from China and the UK embarked on a study to assess the effectiveness and safety of laughter exercises in patients suffering from symptoms of dry eye disease. The study involved 283 participants between 18 and 45 (average age 29; 74% female) evaluated for dry eye disease using the ocular surface disease index (OSDI) score. Participants were randomly assigned to either a laughter exercise group or a control group that received 0.1% sodium hyaluronic acid eye drops four times daily for eight weeks. To ensure a clear comparison, those with existing eye conditions, injuries, infections, allergies, recent use of contact lenses, or prior dry eye disease treatments were excluded from the trial.

The laughter exercise group participated in a unique regimen. They watched an instructional video and were guided to vocalize and repeat the phrases “Hee hee hee, hah hah hah, cheese cheese cheese, cheek cheek cheek, hah hah hah hah hah hah” 30 times in a five-minute session. This exercise was standardized using a face recognition mobile app to ensure consistency and enhance facial movements. Meanwhile, the control group applied the prescribed eye drops to both eyes four times daily, tracking usage via the same mobile app.

After the eight-week intervention period, both treatments ceased, and changes in eye surface discomfort were measured at the 10th and 12th weeks. The findings revealed that the average OSDI score was 10.5 points lower in the laughter exercise group, indicating less discomfort than 8.83 points lower in the eye drop group, with a mean difference of −1.45 points. This suggested that laughter exercises were comparably practical to eye drops.

In addition to the primary outcome, laughter exercise showed significant improvements in non-invasive tear break-up time, the time taken for the first dry spot to appear on the cornea after a blink, and meibomian gland function, which helps prevent tears from evaporating too quickly. Improvements in mental health scores were also observed, with no adverse events reported in either group throughout the study.

While the authors acknowledge certain limitations in their study that could influence the results, they conclude that laughter exercise is non-inferior to 0.1% sodium hyaluronic acid in improving symptoms and clinical signs of dry eye disease. They propose laughter exercise as a safe, environmentally friendly, and low-cost intervention that could serve as a first-line, home-based treatment for people with symptomatic dry eye disease and limited corneal staining, thereby adding a new dimension to holistic approaches in healthcare management.

More information: Jing Li et al, Effect of laughter exercise versus 0.1% sodium hyaluronic acid on ocular surface discomfort in dry eye disease: non-inferiority randomised controlled trial, The BMJ. DOI: 10.1136/bmj-2024-080474

Journal information: The BMJ Provided by BMJ Group

Nutritional Component Shown to Extend Lifespan and Defend Against Alzheimer’s in Research Models

Leave a Reply

A collaborative study between the Colour and Food Quality group at the University of Seville’s Faculty of Pharmacy and Dr Marina Ezcurra’s team at the University of Kent has demonstrated that the carotenoid phytoene enhances the longevity of the nematode Caenorhabditis elegans and mitigates the onset of paralysis linked to amyloid plaque formation in Alzheimer’s disease models. The research noted longevity increases ranging from 10 to 18.6% and reductions in the proteotoxic effects of the plaques by 30 to 40%.

This investigation is part of Ángeles Morón Ortiz’s doctoral work, which explored pure phytoene and microalgae-derived extracts rich in this carotenoid. Dr. Paula Mapelli Brahm expressed optimism about these initial findings, highlighting the team’s pursuit of additional funding to explore the mechanisms behind these beneficial effects further.

The use of Caenorhabditis elegans in this study underscores its value as a model organism in biomedical research. It has previously facilitated groundbreaking discoveries in areas like programmed cell death, RNA interference, and the applications of GFP protein, which have garnered Nobel Prizes.

The research team, led by Professor Antonio Jesús Meléndez Martínez, has dedicated over 15 years to the study of phytoene, a carotenoid present in various foods, including tomatoes, carrots, apricots, red peppers, oranges, mandarins, and passion fruit. Notably, phytoene is effectively absorbed by the body and prevalent in numerous tissues, such as the skin, where it is believed to offer protection against ultraviolet radiation.

Professor Meléndez Martínez’s team focuses on the sustainable production of nutritious foods that could decrease disease risks, mainly through applying carotenoids in agriculture, nutrition, and cosmetics. Their efforts include leading international networks with contributions from researchers across 50 countries to enhance global health through improved food quality.

More information: Ángeles Morón-Ortiz et al, Phytoene and Phytoene-Rich Microalgae Extracts Extend Lifespan in C. elegans and Protect against Amyloid-β Toxicity in an Alzheimer’s Disease Model, Antioxidants. DOI: 10.3390/antiox13080931

Journal information: Antioxidants Provided by University of Seville

Significant Disparities Observed in Home Medical Testing Among Older Adults

Leave a Reply

With the latest distribution of free COVID-19 rapid tests across the nation and a variety of other home medical tests now easily accessible on store shelves and online platforms, a recent study delves into the perceptions of older adults regarding this surge in opportunities to address medical queries from the comfort of their homes.

The research utilises data gathered from a survey involving individuals aged between 50 and 80, probing their past experiences and opinions on a broad spectrum of home medical tests. These inquiries covered tests for conditions such as cancer, infections, allergies, and genetic traits and distinguished between tests that deliver immediate results and those that require samples to be mailed for analysis.

A considerable portion of the older demographic, 48%, reported purchasing at least one such test previously, excluding those obtained for free like the COVID-19 tests and according to results published in the journal Inquiry, which draw from data compiled by the University of Michigan National Poll on Healthy Aging, a vast majority of these purchasers, 91%, expressed willingness to repurchase these tests. The convenience of conducting tests at home was acknowledged by nearly 80% of the participants, with 60% deeming them reliable and 75% finding them cost-effective.

Interestingly, even among those who had not yet experimented with home testing at the time of the survey, 75% were open to trying it in the future, and 71% appreciated the convenience. However, fewer participants regarded them as reliable or financially worthwhile.

The survey highlighted notable disparities in the uptake and perception of home medical tests across different demographics, potentially exacerbating existing inequities in early disease detection and risk assessment. The researchers, affiliated with the U-M Institute for Healthcare Policy and Innovation, noted that individuals with higher educational attainments or household incomes were likelier to engage with these tests. For instance, 56% of respondents with a college degree and 61% with an income over $100,000 had purchased a home medical test, compared to lower percentages among other educational and income groups.

Educational background also influenced perceptions of convenience and the likelihood of future purchases. Meanwhile, racial and gender differences were evident as nicely, with 36% of Black older adults having purchased such tests, compared to higher percentages among other racial groups. Women showed a higher inclination towards future purchases of home tests, with 87% expressing interest, compared to 76% of men.

The study’s lead author, Dr. Joshua Rager, expressed surprise at the high proportion of older adults who had purchased home DNA tests, either for medical reasons or ancestry tracing. The proportion stood at 16% overall but was higher among those with higher education and income levels.

Concerns were also raised about one of the major companies in the DNA testing market, 23andMe, currently experiencing financial difficulties, which could affect customers’ control over their genetic information. This issue underscores the importance of ongoing scrutiny of how home testing impacts patient care and the broader healthcare landscape.

The researchers emphasise the necessity for clinicians to be aware of their patients’ increasing reliance on home testing and discuss the results and reasons for choosing these over traditional testing methods. Moreover, the regulatory landscape surrounding home tests, overseen by entities such as the U.S. Food and Drug Administration, plays a crucial role in shaping user experience and trust.

Ultimately, the findings from this study prompt a broader discussion on health equity and the potential for home testing to address disparities in access to medical services, especially in critical areas like cancer screening and managing conditions disproportionately affecting specific demographic groups. The insights from this poll are expected to inform regulators, policymakers, and further research in this evolving field.

More information: Joshua Rager et al, Use of At-Home Medical Tests Among Older US Adults: A Nationally Representative Survey, Inquiry. DOI: 10.1177/00469580241284168

Journal information: Inquiry Provided by Michigan Medicine – University of Michigan

Are Preventive Health Technologies Beneficial or Detrimental to Consumer Wellbeing?

Leave a Reply

Preventive health technologies, such as wrist-worn activity trackers and various health and fitness applications, have become popular tools designed to augment well-being. These devices and apps, equipped to track and analyze personal health data, are lauded for their potential to empower users by providing detailed insights into their physical activities, dietary habits, and overall health. Despite their apparent benefits, a recent study published in the Journal of Consumer Affairs presents a nuanced examination of these technologies, suggesting that the reality of their impact on wellbeing is complex and dual-natured.

The research involved in-depth interviews with 30 individuals who regularly use these preventive health technologies. The study participants represented a diverse group, each employing these tools for various personal health objectives. Some sought to lose weight, others aimed to elevate their athletic performance, some monitored their engagement in pleasurable activities, and a few strived to establish or maintain a healthy lifestyle. This variety of motivations underscores these technologies’ broad appeal and versatility in addressing different health and wellness goals.

Interestingly, the study revealed distinct patterns of user engagement, termed “engagement trajectories,” which varied significantly among participants. A typical trajectory observed was an initial surge in usage, which eventually plateaued as users integrated the technology into their daily routines. Another group exhibited diminishing engagement over time, losing interest after the initial novelty wore off. Conversely, some individuals showed signs of becoming overly reliant on the technology, developing compulsive usage habits that could potentially lead to negative psychological impacts.

The investigators noted that the consequences of engaging with preventive health technologies could be beneficial or detrimental. On the one hand, these tools can promote awareness and foster healthier habits by keeping users informed about their daily health behaviours. On the other hand, they can lead to obsessive behaviours, where constant monitoring becomes a source of stress rather than a means to better health. This compulsive engagement with technology not only disrupts daily life but can also contribute to mental distress and decreased well-being.

The study’s lead author, Lisa Baiwir, a PhD candidate at the University of Liège in Belgium, emphasized the critical implications of these findings. She pointed out that understanding the triggers and consequences of over-engagement is crucial as these technologies become more integrated into our daily lives. This knowledge is essential for developers and designers of health applications, as it highlights the need to create features that promote balanced and healthy use of technology without fostering dependency.

While preventive health technologies promise to improve health outcomes and enhance quality of life, this study highlights the importance of using them judiciously. As they become ever more embedded in our daily routines, users and developers must remain vigilant about the potential pitfalls of technology use. It is imperative that future designs not only enhance functionality but also consider the psychological and emotional well-being of users, ensuring that these tools genuinely contribute to, rather than detract from, overall health and happiness.

More information: Lisa Baiwir et al, Consumer engagement with preventive health technologies: A double-edged sword for consumer wellbeing, Journal of Consumer Affairs. DOI: 10.1111/joca.12603

Journal information: Journal of Consumer Affairs Provided by Wiley

Genetic Insights into Lyme Disease: Enhancing Diagnostic and Treatment Approaches

Leave a Reply

A comprehensive genetic analysis of the bacteria responsible for Lyme disease has the potential to revolutionise the way we diagnose, treat, and prevent this increasingly prevalent tick-borne illness.

By charting the genetic landscapes of 47 distinct strains of Lyme disease-causing bacteria from across the globe, an international research team has crafted an invaluable resource that could pinpoint the exact bacterial strains infecting individuals. This precision might lead to the development of more accurate diagnostic tools and bespoke treatments that directly target the specific bacteria involved in each patient’s illness, thereby enhancing the effectiveness and efficiency of medical interventions.

Steven Schutzer, a professor at Rutgers New Jersey Medical School and co-author of this pivotal study published in the journal mBio, highlights the significance of their findings: “This detailed and high-calibre sequencing study of Lyme disease and its related bacteria lays a robust foundation that will significantly advance the entire field. It supports a wide spectrum of research—from clinical studies and public health initiatives to investigations into bacterial physiology, ecology, evolution, and the development of medical tools.”

The genetic data unearthed through this study elucidates how the bacteria evolve and disperse and identifies genes crucial for survival. Such insights are expected to spur the development of more effective vaccines against Lyme disease, a pressing need given the disease’s status as the most commonly reported tick-borne illness in North America and Europe, where it impacts hundreds of thousands annually.

The research delineates the complete genomes of bacteria from all 23 known species within the Borrelia burgdorferi sensu lato group, responsible for Lyme disease, including several strains that had yet to be sequenced before this project. Funded by the National Institutes of Health, this groundbreaking endeavour provides a historical reconstruction of the evolutionary trajectory of Lyme disease bacteria, tracing their origins back millions of years to a time likely preceding the breakup of the ancient supercontinent Pangea. This ancient origin story helps explain the bacteria’s current global distribution.

The team also shed light on the bacteria’s genetic recombination processes, through which they exchange genetic material within and between species. This mechanism enables rapid evolution and adaptation to new hosts and environments. By identifying specific genomic ‘hot spots’ where the genetic exchange is most frequent, researchers have pinpointed areas that often involve genes essential for the bacteria’s interactions with their tick carriers and various animal hosts.

Weigang Qiu, a biology professor at the City University of New York and the senior author of the study, explained the practical implications of these findings: “Understanding the evolutionary dynamics and genetic adaptability of these bacteria enhances our capacity to predict and mitigate shifts in their pathogenic potential, which is crucial for anticipating and thwarting their ability to cause disease in humans.”

To aid further research, the team has developed BorreliaBase.org, a web-based platform that allows scientists worldwide to analyse Borrelia genomes and pinpoint critical factors influencing their pathogenicity. This tool is set to be instrumental in future research efforts.

Future directions of this research include deeper genomic analyses of Lyme disease bacteria, particularly those from regions previously underexplored, and an in-depth investigation into the functions of genes unique to disease-causing strains. Such studies could uncover novel targets for therapeutic intervention.

As Lyme disease expands geographically, partly due to climate change, this research offers essential tools and insights for addressing this growing public health challenge. Benjamin Luft, the Edmund D. Pellegrino Professor of Medicine at the Renaissance School of Medicine at Stony Brook University, aptly summarises the impact of this work: “This seminal study not only equips researchers with the data and tools needed to refine treatments for all variants of Lyme disease but also sets a model for similar strategies against other infectious diseases caused by pathogens.”

More information: Saymon Akther et al, Natural selection and recombination at host-interacting lipoprotein loci drive genome diversification of Lyme disease and related bacteria, mBio. DOI: 10.1128/mbio.01749-24

Journal information: mBio Provided by Rutgers University