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	<title>Life &#8211; Science</title>
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	<title>Life &#8211; Science</title>
	<link>https://scienmag.com</link>
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		<title>Tuberculosis Drug Scaffold Reborn as Multistage Antimalarial Chemotype</title>
		<link>https://scienmag.com/tuberculosis-drug-scaffold-reborn-as-multistage-antimalarial-chemotype/</link>
		
		<dc:creator><![CDATA[Kristina Jarvis]]></dc:creator>
		<pubDate>Thu, 15 Oct 2026 13:09:11 +0000</pubDate>
				<category><![CDATA[Science News]]></category>
		<category><![CDATA[Activity]]></category>
		<category><![CDATA[Against]]></category>
		<category><![CDATA[antimalarial drug discovery strategies]]></category>
		<category><![CDATA[antimycobacterial]]></category>
		<category><![CDATA[BM212]]></category>
		<category><![CDATA[BM212 antitubercular compound]]></category>
		<category><![CDATA[combating global malaria burden]]></category>
		<category><![CDATA[cycle]]></category>
		<category><![CDATA[derivatives]]></category>
		<category><![CDATA[drug repositioning for antimalarial therapy]]></category>
		<category><![CDATA[falciparum]]></category>
		<category><![CDATA[innovative approaches in infectious disease control]]></category>
		<category><![CDATA[Life]]></category>
		<category><![CDATA[malaria drug development]]></category>
		<category><![CDATA[multi-stage antimalarial agents]]></category>
		<category><![CDATA[multi-stage malaria transmission inhibitors]]></category>
		<category><![CDATA[multiple]]></category>
		<category><![CDATA[new chemotypes for malaria treatment]]></category>
		<category><![CDATA[Plasmodium]]></category>
		<category><![CDATA[Plasmodium falciparum life cycle targeting]]></category>
		<category><![CDATA[Probing]]></category>
		<category><![CDATA[resistance to artemisinin and partner drugs]]></category>
		<category><![CDATA[stages]]></category>
		<category><![CDATA[tuberculosis drug scaffold repurposing]]></category>
		<guid isPermaLink="false">https://scienmag.com/?p=274375</guid>

					<description><![CDATA[Malaria remains one of the world's most stubborn infectious diseases, and the tools used to fight it are losing their edge. According to the World Health Organization, an estimated 280 million malaria cases and roughly 600,000 deaths occurred worldwide in]]></description>
										<content:encoded><![CDATA[<p>Malaria remains one of the world&#8217;s most stubborn infectious diseases, and the tools used to fight it are losing their edge. According to the World Health Organization, an estimated 280 million malaria cases and roughly 600,000 deaths occurred worldwide in 2024, with the African Region bearing 94 percent of cases and 95 percent of deaths. Global progress in reducing malaria morbidity and mortality has effectively stalled since 2015, with incidence and mortality increasing by 9 and 12 percent respectively, driven at least in part by the emergence and spread of resistance to artemisinin and its partner drugs. Against this backdrop, a research collaboration spanning Sapienza University of Rome, the University of Pretoria, and the University of the Witwatersrand has reported a promising new chemotype capable of targeting multiple life cycle stages of Plasmodium falciparum, including the sexual stages responsible for onward transmission. The work, published in Frontiers in Drug Discovery, builds on an unexpected source: an antitubercular compound called BM212.</p>
<p>The scientific logic behind this drug repositioning effort is elegant. BM212 is a 1,3,5-trisubstituted pyrrole originally identified during a phenotypic screen of azole, imidazole, pyrrole, and toluidine derivatives against Mycobacterium tuberculosis, where it displayed a minimal inhibitory concentration of 5 micromolar against drug-sensitive strains and 8 micromolar against multidrug-resistant strains. Whole-genome sequencing of resistant mutants later revealed that BM212 acts by directly binding MmpL3, an essential inner membrane protein involved in trehalose monomycolate flipping during mycobacterial cell wall biosynthesis. Meanwhile, a structurally related pyrazole compound, MMV1580843, had emerged from a parallel screen of the Medicines for Malaria Venture Pandemic Response Box as a hit with striking stage-specific activity against late-stage gametocytes, showing a half-maximal inhibitory concentration of 0.11 micromolar while being comparatively inactive against asexual blood-stage parasites. Recognizing the considerable structural similarity between the two molecules, the team hypothesized that the BM212 pyrrole scaffold could be systematically optimized to yield antiplasmodial activity across the parasite life cycle.</p>
<p>The medicinal chemistry campaign was deliberately modular. The researchers synthesized a focused library of 33 compounds, keeping the central pyrrole core constant while systematically varying substituents at three positions: N1, C5, and C3. The synthetic strategy relied on a Stetter reaction between methyl vinyl ketone and appropriate benzaldehydes to generate 1,4-diketones, which were then cyclized with corresponding amines to afford 1,5-disubstituted pyrroles. A subsequent Mannich reaction with formaldehyde and amines introduced the C3 cyclic amine substituents. This efficient, step-economical route enabled rapid access to structurally diverse derivatives in good overall yields, providing a sufficiently diverse compound set to support a comprehensive structure-activity relationship investigation. Several compounds had been previously reported as BM212 analogues evaluated for antitubercular activity, but they were deliberately resynthesized and re-evaluated within the present work to enable a coherent SAR analysis in the antiplasmodial context.</p>
<p>Biological profiling was conducted across multiple life cycle stages using rigorous, orthogonal assays. Activity against asexual blood-stage parasites of the drug-sensitive NF54 strain was measured using a SYBR Green I fluorescence assay, detecting parasite proliferation after 96 hours of drug pressure. Compounds with IC50 values below 1 micromolar were additionally profiled against the multidrug-resistant Dd2 strain to assess cross-resistance potential. Late-stage gametocyte activity was evaluated using PrestoBlue fluorescence or flow cytometric readouts with MitoTracker Deep Red staining, while cytotoxicity was assessed against a human hepatocellular carcinoma line, Hep G2. All IC50 values were calculated through nonlinear regression using a four-parameter logistic dose-response model, with all data reported from a minimum of three independent biological replicates performed in technical triplicates. Assay reproducibility was confirmed by Z-factors all exceeding 0.8, ensuring the reliability of the SAR conclusions drawn from the dataset.</p>
<p>The first and most striking SAR trend concerned the C3 cyclic amine, which emerged as the dominant driver of life cycle stage preference. BM212 itself, bearing an N-methylpiperazine at C3, displayed more than 50-fold increased activity against late-stage gametocytes over asexual parasites, with an IC50 of 0.18 micromolar against gametocytes while being inactive above 10 micromolar against both NF54 and Dd2 asexual stages. When the researchers replaced this piperazine with a morpholine or a 4,4-difluoropiperidine, gametocytocidal activity collapsed, but measurable activity against asexual blood stages was retained. In contrast, the dimethyl-azasilinane analogue, compound 1, retained potent gametocytocidal activity with an IC50 of 0.48 micromolar while displaying improved activity against asexual parasites with an IC50 of 1.08 micromolar, suggesting that dual-stage activity can indeed be achieved within the BM212 pyrrole scaffold, in contrast to the structurally related pyrazole MMV&#8217;843, which predominantly displays gametocytocidal activity.</p>
<p>Further optimization focused on the electronic properties of the N1 and C5 substituents. Electron-deficient aryl groups such as 4-fluorophenyl and 2-trifluoromethylphenyl consistently enhanced potency and improved physicochemical properties across the series. In the methylpiperazine series, the difluorinated analogue, compound 7, achieved a remarkable IC50 of 0.093 micromolar against late-stage gametocytes, a twofold improvement over BM212 itself, while simultaneously delivering a fourfold improvement in asexual blood-stage activity relative to the parent compound. Aqueous solubility also improved dramatically, reaching 185 micromolar for compound 7 compared with just 10 micromolar for BM212. However, a clear limitation emerged: simultaneously reducing lipophilicity at both N1 and C5, for example by introducing pyridyl rings at both positions, proved detrimental to biological activity, with compound 12 showing a greater than 30-fold reduction in potency against both life cycle stages. This finding underscores the delicate balance between polarity and hydrophobic fit that governs activity in this scaffold.</p>
<p>The morpholine series provided additional SAR insights from a bioisosteric perspective. Morpholine is a privileged heterocycle commonly used in medicinal chemistry to reduce basicity relative to piperazine, improve metabolic stability, and introduce an additional hydrogen-bond acceptor through its ether oxygen. Although the initial morpholine analogue showed limited activity against both asexual parasites and gametocytes, subsequent modifications led to modest improvements in asexual blood-stage activity, with compounds 18 through 20 displaying IC50 values below 2.5 micromolar. Potent gametocytocidal activity was restored by introducing fluorophenyl substituents, with compounds 25, 26, and 32 all retaining sub-micromolar activity against late-stage gametocytes. Notably, exchanging the N1 and C5 substituents between compounds 32 and 33 resulted in a marked change in biological profile, indicating that the positional arrangement of these substituents strongly influences activity. The difluorophenyl analogue, compound 26, exhibited substantially improved aqueous solubility of 180 micromolar compared with less than 5 micromolar for the parent morpholine analogue.</p>
<p>Resistance profiling and transmission-blocking evaluation provided the most compelling translational evidence. Several optimized analogues retained activity against the multidrug-resistant Dd2 strain, with IC50 values ranging from 1.01 to 1.54 micromolar and less than threefold differences in potency relative to the drug-sensitive NF54 strain. This sensitivity profile implies that mutations in the chloroquine resistance transporter PfCRT, antifolate resistance mutations, or copy number variation in the multidrug resistance transporter do not confer resistance to the compounds evaluated here, a critical consideration given the de novo development of artemisinin kelch-13 resistance mutations in African parasite populations. In the standard membrane feeding assay, compound 9 achieved 81 percent transmission-reducing activity, while BM212 itself achieved 62 percent. Interestingly, both compounds showed a markedly stronger effect on female gamete formation than on male gamete exflagellation, a profile that differs from many antimalarial candidates and may suggest a mechanism of action distinct from compounds that primarily interfere with cell division during male gametogenesis.</p>
<p>The molecular target of these compounds in Plasmodium remains unknown, and this represents both a challenge and an opportunity. Plasmodium does not possess an MmpL3 homolog, the primary target of BM212 in mycobacteria, so the antiplasmodial activity must arise through a different mechanism. Interestingly, other well-known MmpL3 inhibitors such as ethambutol and the ethylenediamine SQ109 have previously also shown activity against P. falciparum parasites with a similar preference towards late-stage gametocytes, although the involvement of resistance nodulation-division superfamily proteins has been excluded for these compounds, pointing instead to ionophore activity. The researchers propose that enhanced evolution techniques to select for resistant parasites, thermal protein profiling, or chemical pulldown proteomics using labelled versions of lead compounds could directly identify protein target engagement in the parasites. Determining the minimum inoculum of resistance for this series would also be important to evaluate their potential propensity to resistance.</p>
<p>Overall, this work positions BM212-derived pyrroles as a promising and versatile multistage antiplasmodial chemotype while delineating the key structural determinants required to achieve potency, selectivity, and transmission-blocking efficacy. The scaffold now stands ready for a formal hit-to-lead campaign, where the effects of structural changes on active compounds must be investigated in light of enhanced metabolic stability in microsomes and hepatocytes, leading to pharmacokinetic characterization and in vivo efficacy studies to assess the potential of early lead antimalarial candidates. Given that malaria elimination will require a multipronged approach including recently recommended vaccines such as RTS,S and R21/Matrix-M, together with strategies aimed at blocking parasite transmission, chemotypes that target both asexual blood-stage parasites and mature gametocytes offer genuine promise for reducing transmission rates and preventing the spread of resistance once it has developed in the asexual stages. The BM212 pyrrole scaffold, born from tuberculosis drug discovery and reborn through systematic antiplasmodial optimization, may yet contribute meaningfully to that effort.</p>
<p><strong>Subject of Research:</strong> Probing the activity of BM212, an antimycobacterial, and its derivatives against multiple life cycle stages of Plasmodium falciparum</p>
<p><strong>Article Title:</strong> Probing the activity of BM212, an antimycobacterial, and its derivatives against multiple life cycle stages of Plasmodium falciparum</p>
<p><strong>Article References:</strong> Salvucci, B., van der Watt, M., Tammaro, C., Guida, M., Pantaleo, L., Reader, J., Rabie, T., Tshabalala, S., Naude, M., Venter, N., Welcome, T., Erlank, E., Koekemoer, L. L., Biava, M., Birkholtz, L.-M., &amp; Poce, G. (2026). Probing the activity of BM212, an antimycobacterial, and its derivatives against multiple life cycle stages of Plasmodium falciparum. <em>Frontiers in Drug Discovery, 6</em>, Article 1919483. <a href="https://doi.org/10.3389/fddsv.2026.1919483" rel="noopener noreferrer">https://doi.org/10.3389/fddsv.2026.1919483</a></p>
<p><strong>Image Credits:</strong> AI Generated</p>
<p><strong>DOI:</strong> <a href="https://doi.org/10.3389/fddsv.2026.1919483" rel="noopener noreferrer">10.3389/fddsv.2026.1919483</a></p>
<p><strong>Keywords:</strong> Probing, activity, BM212, antimycobacterial, derivatives, against, multiple, life, cycle, stages, Plasmodium, falciparum</p>
]]></content:encoded>
					
		
		
		<post-id xmlns="com-wordpress:feed-additions:1">274375</post-id>	</item>
		<item>
		<title>Malnutrition May Shorten Lives in Long-Term Care: A New Systematic Review Aims to Find Out</title>
		<link>https://scienmag.com/malnutrition-may-shorten-lives-in-long-term-care-a-new-systematic-review-aims-to-find-out/</link>
		
		<dc:creator><![CDATA[Daisy Hatcher]]></dc:creator>
		<pubDate>Thu, 15 Oct 2026 09:43:31 +0000</pubDate>
				<category><![CDATA[Medicine]]></category>
		<category><![CDATA[aging and malnutrition prevention in elderly]]></category>
		<category><![CDATA[aging and nutritional health]]></category>
		<category><![CDATA[association]]></category>
		<category><![CDATA[Care]]></category>
		<category><![CDATA[demographic shifts and aging population health]]></category>
		<category><![CDATA[elderly life expectancy and dietary intake]]></category>
		<category><![CDATA[expectancy]]></category>
		<category><![CDATA[facilities]]></category>
		<category><![CDATA[impact of nutrition on elderly health]]></category>
		<category><![CDATA[Length]]></category>
		<category><![CDATA[Life]]></category>
		<category><![CDATA[long-term]]></category>
		<category><![CDATA[long-term care resident health outcomes]]></category>
		<category><![CDATA[malnutrition and hospitalizations in seniors]]></category>
		<category><![CDATA[malnutrition in long-term care facilities]]></category>
		<category><![CDATA[nutrition]]></category>
		<category><![CDATA[nutrition intervention strategies for older adults]]></category>
		<category><![CDATA[nutrition-related health risks in nursing homes]]></category>
		<category><![CDATA[public health challenges of aging Canada]]></category>
		<category><![CDATA[review]]></category>
		<category><![CDATA[services]]></category>
		<category><![CDATA[Stay]]></category>
		<category><![CDATA[systematic]]></category>
		<category><![CDATA[systematic review of malnutrition outcomes]]></category>
		<guid isPermaLink="false">https://scienmag.com/?p=273459</guid>

					<description><![CDATA[What if the difference between a longer life and an earlier death in a nursing home came down to something as basic — and as fixable — as what residents eat and drink? A team of Canadian researchers is betting]]></description>
										<content:encoded><![CDATA[<p>What if the difference between a longer life and an earlier death in a nursing home came down to something as basic — and as fixable — as what residents eat and drink? A team of Canadian researchers is betting it might. In a systematic review protocol published in Ageing International, Idrissa Beogo of the University of Ottawa and colleagues outline an ambitious plan to synthesize the evidence linking malnutrition to two of the most consequential outcomes in long-term care: the occurrence of new morbid events such as hospitalizations and pathological imbalances, and the length of stay — until death — of older people in long-term care facilities. The protocol, received in November 2024 and accepted in October 2026, sets the stage for one of the most comprehensive examinations of the nutrition and life expectancy nexus ever attempted in the sector.</p>
<p>The urgency behind the project is demographic as much as clinical. According to Statistics Canada, by 2050 nearly one in four Canadians — 24.9 percent of the population — will be aged 65 years or older. This shift presents major public health challenges, including ensuring adequate nutrition to support healthy aging and prevent nutrition-related adverse health outcomes among older adults. It is particularly true for the 6.8 percent of Canadians who reside in a long-term care facility, where the stakes of every meal are magnified by frailty, chronic disease and dependence on institutional food services. Despite the importance of nutrition at old age, the current literature, the authors note, puts emphasis on managerial aspects of eating and drinking — how mealtimes are organized, how dining rooms are staffed, how food is prepared — rather than on the hard clinical question of whether malnutrition actually shortens lives.</p>
<p>That gap matters because the biological case for concern is well established. Malnutrition in older adults is not simply a matter of being underweight; it is a syndrome involving inadequate protein and energy intake, unintended weight loss, low body mass index and diminished muscle mass that together erode physiological reserves. Research cited in the protocol shows that weight loss and low BMI are associated with increased mortality among nursing home residents, and that undernutrition still prevails in nursing homes despite decades of awareness. A 2026 systematic review and meta-analysis in BMC Geriatrics examined the incidence and associated factors of malnutrition among older people in nursing homes, underscoring how widespread and persistent the problem remains across settings. Hospital malnutrition, too, carries substantial costs — both human and economic — as documented in studies of hospital malnutrition prevalence and the economic cost of malnutrition in Europe.</p>
<p>The review&#8217;s design reflects the methodological rigor expected of modern evidence synthesis. It will include quantitative studies comparing Canada with Organization for Economic Co-operation and Development member countries, allowing the team to situate Canadian findings within an international context. Participants will include older people residing in any type of long-term care facility, and the analysis will take into account the type of facility, ownership status and participant characteristics — variables that matter enormously in a sector where ownership models range from municipal homes to for-profit chains. The protocol explicitly seeks to synthesize the evidence on the association between malnutrition and the occurrence of morbid events, such as new pathology, pathological imbalance and hospitalization, and the length of stay until death of older people in long-term care facilities.</p>
<p>The search strategy is correspondingly exhaustive. The team will query eight databases: Academic Search Complete, AgeLine, CINAHL, Cochrane CENTRAL, Embase, Food Science and Technology Abstracts, MEDLINE and Web of Science. The preliminary MEDLINE search strategy, reproduced in the protocol&#8217;s appendix, combines controlled vocabulary terms for nursing homes, homes for the aged, skilled nursing facilities and residential facilities with nutrition concepts spanning nutrition therapy, nutritional status, malnutrition, weight loss and feeding behavior, all intersected with geriatric and aged population terms and limited to studies published from 2010 onward. This layered approach — subject headings, title and abstract keywords, and population-specific terms — is designed to capture the full spectrum of quantitative evidence while minimizing the risk of missing relevant studies buried in the literature.</p>
<p>Methodological quality assessment will follow established tools. The protocol references the Newcastle-Ottawa Scale for assessing the quality of studies in systematic reviews, the revised Cochrane risk-of-bias tool for randomized trials, and AMSTAR 2, a critical appraisal tool for systematic reviews that include randomized or non-randomized studies of healthcare interventions. The team will adhere to PRISMA-P, the preferred reporting items for systematic review and meta-analysis protocols, and PRISMA-S, an extension for reporting literature searches. Peer review of electronic search strategies will follow the PRESS 2015 guideline statement, ensuring that the search itself withstands scrutiny. These frameworks, developed and refined over the past two decades, are what separate a credible synthesis from a cherry-picked narrative — and the authors&#8217; adherence to them signals that the eventual findings will be built on transparent, reproducible methods.</p>
<p>The Canadian context gives the project particular resonance. The protocol has the merit, the authors write, of presenting the state of the nutrition and life expectancy nexus in Canadian long-term care facilities where underfunding is apparent. The sector&#8217;s struggles are well documented: studies of staffing levels and expenses in Canadian long-term care facilities by ownership status before and during the COVID-19 pandemic, analyses of who is looking after mom and dad among unregulated workers in Canadian long-term care homes, and the Ontario Long-Term Care COVID-19 Commission&#8217;s final report all point to structural fragility. Low staffing levels have been associated with malnutrition in long-term residential care homes, and longitudinal research has linked staff shortages and staff levels with health outcomes in nursing homes. Dietary service staffing, in turn, has been shown to impact nutritional quality in nursing homes — a chain of evidence connecting workforce to food to health.</p>
<p>The international comparison adds another layer of significance. A comparison of COVID-19 mortality rates among long-term care residents in 12 OECD countries revealed stark cross-national disparities, and OECD analysis of COVID-19 in long-term care documented the impact, policy responses and challenges across member states. By including OECD countries in the review, the team will be able to ask whether the association between malnutrition and life expectancy holds across different health systems, regulatory regimes and funding models — or whether it is modulated by them. The results, the protocol states, will inform the development of best practices and the formulation of nutrition policies, positioning the review as a direct input into policy rather than an academic exercise. Existing ESPEN guidelines on clinical nutrition and hydration in geriatrics provide a clinical foundation, but the protocol&#8217;s focus on facility type, ownership and participant characteristics could reveal how organizational context shapes nutritional outcomes in ways guidelines alone cannot address.</p>
<p>What makes the protocol potentially viral in its implications is the simplicity of its central question. Nutrition is one of the few modifiable factors in long-term care that touches every resident every day. If the synthesis confirms that malnutrition is associated with shorter stays and more morbid events — controlling for facility type, ownership and participant characteristics — the findings could reshape how governments fund food services, how facilities staff dietary departments, and how clinicians screen and intervene. If it does not, that too would be informative, redirecting attention to other drivers of health outcomes. Either way, the review promises to move the conversation from how mealtimes are managed to whether the food on the plate is literally a matter of life and death. The authors declare no competing interests, and no datasets were generated or analysed during the current study, as the protocol precedes the evidence synthesis itself. The full review, once completed, will be watched closely by gerontologists, dietitians and policymakers alike — because in a sector where 6.8 percent of Canadians live out their final years, the answer could not come soon enough.</p>
<p><strong>Subject of Research:</strong> Association of Nutrition Services and Length of Stay/Life Expectancy in Long-term Care Facilities: A Systematic Review Protocol</p>
<p><strong>Article Title:</strong> Association of Nutrition Services and Length of Stay/Life Expectancy in Long-term Care Facilities: A Systematic Review Protocol</p>
<p><strong>Article References:</strong> Association of Nutrition Services and Length of Stay/Life Expectancy in Long-term Care Facilities: A Systematic Review Protocol. (n.d.). <a href="https://doi.org/10.1007/s12126-026-09682-8" rel="noopener noreferrer">https://doi.org/10.1007/s12126-026-09682-8</a></p>
<p><strong>Image Credits:</strong> AI Generated</p>
<p><strong>DOI:</strong> <a href="https://doi.org/10.1007/s12126-026-09682-8" rel="noopener noreferrer">10.1007/s12126-026-09682-8</a></p>
<p><strong>Keywords:</strong> Association, Nutrition, Services, Length, Stay, Life, Expectancy, Long-term, Care, Facilities, Systematic, Review</p>
]]></content:encoded>
					
		
		
		<post-id xmlns="com-wordpress:feed-additions:1">273459</post-id>	</item>
		<item>
		<title>Wild Mexican Worm Reveals How Decades of Lab Life Reshaped the Famous N2 Nematode</title>
		<link>https://scienmag.com/wild-mexican-worm-reveals-how-decades-of-lab-life-reshaped-the-famous-n2-nematode/</link>
		
		<dc:creator><![CDATA[Juliet Wilcox]]></dc:creator>
		<pubDate>Sat, 03 Oct 2026 23:38:55 +0000</pubDate>
				<category><![CDATA[Biology]]></category>
		<category><![CDATA[Caenorhabditis elegans]]></category>
		<category><![CDATA[Caenorhabditis elegans wild strain comparison]]></category>
		<category><![CDATA[evolutionary effects of laboratory propagation on Caenorhabditis elegans]]></category>
		<category><![CDATA[fertility]]></category>
		<category><![CDATA[genetic divergence between wild and laboratory C. elegans]]></category>
		<category><![CDATA[heat shock response]]></category>
		<category><![CDATA[impact of long-term lab cultivation on nematode genetics]]></category>
		<category><![CDATA[laboratory adaptation]]></category>
		<category><![CDATA[laboratory domestication effects on C. elegans]]></category>
		<category><![CDATA[Life]]></category>
		<category><![CDATA[lifespan]]></category>
		<category><![CDATA[Mexico City]]></category>
		<category><![CDATA[N2 Bristol]]></category>
		<category><![CDATA[Oxidative stress]]></category>
		<category><![CDATA[Pseudomonas aeruginosa]]></category>
		<category><![CDATA[stress resistance]]></category>
		<category><![CDATA[stress response variation in wild and lab C. elegans]]></category>
		<category><![CDATA[transcriptomic differences in domesticated and wild C. elegans]]></category>
		<category><![CDATA[Transcriptomics]]></category>
		<category><![CDATA[wild isolate]]></category>
		<category><![CDATA[wild versus lab strains of Caenorhabditis elegans]]></category>
		<guid isPermaLink="false">https://scienmag.com/?p=232366</guid>

					<description><![CDATA[A newly isolated wild C. elegans strain from Mexico City shows that the laboratory reference N2 strain has transcriptionally and phenotypically diverged from both its ancestral lineage and nature.]]></description>
										<content:encoded><![CDATA[<p>For more than seventy years, the microscopic roundworm Caenorhabditis elegans has been one of biology&#8217;s most celebrated model organisms, underpinning Nobel-winning discoveries in apoptosis, microRNAs, RNA interference, and the genetic control of aging. Yet the strain at the heart of that legacy, the N2 Bristol reference, has been propagated in laboratories since Sydney Brenner picked it up in the 1960s from material isolated near Bristol, UK, in 1951. A new study published in Ecology and Evolution asks a deceptively simple question: how different is that domesticated reference strain from both its own ancestral lineage and a worm freshly plucked from the wild? The answer, drawn from life-history assays, stress tests, and transcriptomics, is striking.</p>
<p>Researchers led by a team at the Universidad Nacional Autónoma de México isolated a new wild C. elegans strain, designated VJV2, from rotting pear fruit buried in gardens in Mexico City in June 2023. Species identity was confirmed by PCR amplification and Sanger sequencing of the ITS2 ribosomal DNA region, and further validated by backcrossing with males of a fluorescent reporter strain. The team then compared this Mexican isolate with two laboratory lineages obtained from the Caenorhabditis Genetics Center: the contemporary N2 Bristol strain, referred to as N2 Lab, and the so-called N2 Ancestral strain, derived from material cryopreserved in 1969 and estimated to be fewer than six generations from that frozen stock. All experiments used worms within ten generations of frozen stocks, minimizing further laboratory drift.</p>
<p>The three strains turned out to differ substantially in core life-history traits. Under standard laboratory conditions of 20 degrees Celsius and an E. coli diet, the Mexican strain had a median lifespan of just 10 days, compared with 12 days for N2 Lab and 13 days for the Ancestral strain, a statistically significant reduction. Fertility told a similar story: total offspring production over six days was highest in N2 Lab at roughly 282 larvae, followed by the Ancestral strain at about 264, while the Mexican strain produced only about 204, the lowest of the three. Daily fertility analysis showed the Mexican strain lagging from the second day of adulthood onward, and the Ancestral strain also produced fewer offspring than N2 Lab on day three, hinting that even the two N2 lineages have quietly diverged during their separate laboratory histories.</p>
<p>Stress-resistance assays revealed a mosaic of strain-specific strengths and weaknesses rather than a uniform hierarchy. When exposed to the bacterial pathogen Pseudomonas aeruginosa strain PA14, the Mexican worm proved the hardiest, with 50 percent lethality occurring at 43 hours post-infection compared with 37 hours for both N2 lineages. Yet under oxidative stress induced by paraquat, the picture reversed: the Mexican strain succumbed fastest, with a median lethal time of 4.7 hours, while the Ancestral strain was the most resistant at 7.8 hours and N2 Lab intermediate at 6.6 hours. Heat stress at 35 degrees Celsius showed yet another pattern, with the Mexican and N2 Lab strains equally tolerant at 7.5 hours and the Ancestral strain more vulnerable at 6.5 hours. Notably, the Mexican strain carries the npr-1 215F allele and displays the characteristic social feeding behavior of wild isolates, aggregating at the low-oxygen edges of bacterial lawns, while both N2 strains feed solitarily.</p>
<p>Transcriptomic profiling by RNA-sequencing under standard conditions provided a molecular explanation for these phenotypic contrasts. Principal component analysis showed that the N2 Lab strain separated cleanly from the other two along the first principal component, which accounted for 78 percent of total variance, while the Mexican and Ancestral strains diverged from each other only along the second axis. Differential expression analysis identified roughly 3,400 genes differing between the wild-type comparisons and N2 Lab, and 55 percent of these were shared between the Mexican and Ancestral strains, an overlap far exceeding chance. In other words, the laboratory-adapted reference strain has drifted furthest from the wild-type transcriptional state, and the Ancestral lineage, despite decades of lab propagation, remains closer to the newly isolated Mexican worm than to its own modern descendant.</p>
<p>Functional enrichment analysis connected these expression differences to observable phenotypes. Genes upregulated uniquely in the Mexican strain were enriched for pathogen-response and lysozyme categories, including lys-7, a lysozyme gene that P. aeruginosa actively suppresses during infection and whose restoration rescues worms from mortality. The Mexican strain also showed reduced expression of spl-2, a sphingosine phosphate lyase whose hyperactivation increases pathogen susceptibility. Conversely, the Ancestral strain, the most paraquat-resistant, showed elevated baseline expression of antioxidant genes including sod-3, gst-4, and gpx-5, while the oxidative-sensitive Mexican strain uniquely downregulated ctl-1, a catalase critical for hydrogen peroxide detoxification. The Ancestral strain&#8217;s reduced thermotolerance was mirrored by downregulation of several heat shock genes, including hsp-1, hsp-6, and hsp-60.</p>
<p>One of the most intriguing shared signatures involved the cuticle. More than 60 collagen transcripts were upregulated in both the Mexican and Ancestral strains relative to N2 Lab, alongside the transcription factor elt-3, which regulates collagen expression in response to environmental stress. Because the collagen-rich cuticle serves as the worm&#8217;s primary protective barrier, and because prior work has shown that cuticle-related traits differ between ancestral and laboratory backgrounds, the authors suggest that laboratory adaptation may have reshaped cuticle biology in the reference strain. Shared downregulated genes, meanwhile, were enriched for DNA repair, chromatin modification, and small noncoding RNA functions, pointing to chromatin-level regulatory differences as a promising avenue for future study.</p>
<p>When the team exposed all three strains to acute heat stress, two hours at 35 degrees Celsius, every strain mounted a massive transcriptional response involving roughly 2,400 to 2,900 differentially expressed genes. Yet the overlap was remarkably narrow: only 27 upregulated and 54 downregulated genes were shared across all three strains. The conserved core centered on the canonical heat-inducible genes hsp-16.2, hsp-16.41, and hsp-70, each induced approximately eight-fold in every background. Beyond that shared core, the Mexican and Ancestral strains again clustered together, sharing nearly a quarter of upregulated and a third of downregulated heat-responsive genes, while N2 Lab followed its own program. RT-qPCR validation confirmed these patterns for hsf-1, hsp-6, hsp-16.2, and daf-18, which were upregulated in the Mexican and Ancestral strains but reduced or unchanged in N2 Lab.</p>
<p>The authors are careful to frame these findings as associations rather than proof of causation. The Mexican strain represents a single isolate, so its traits cannot be generalized to the species&#8217; full diversity, and all RNA-seq reads were mapped to the N2 reference genome, a limitation the team acknowledges by noting that mapping metrics showed no major bias and that strain-specific genomic references would refine future analyses. Standard laboratory conditions, including atmospheric oxygen and a monobacterial diet, may themselves constitute an altered environment for non-domesticated strains, meaning some transcriptional differences could reflect environmental response rather than fixed genetic divergence. The reduced lifespan and fertility of the Mexican worm under lab conditions may likewise reflect a trade-off between traits that enhance survival in nature, such as pathogen defense, and traits favored by stable laboratory culture, such as maximal reproductive output.</p>
<p>Nevertheless, the study carries a practical warning for the thousands of laboratories that rely on C. elegans daily. Strain background, laboratory history, and even the choice between the contemporary N2 and its 1969 ancestor can measurably alter lifespan, fertility, stress resistance, and global gene expression, meaning that experimental outcomes may depend on which version of the reference worm sits in the incubator. As the Caenorhabditis Genetics Center&#8217;s Natural Diversity Resource now catalogs over 2,000 wild isolates from every continent except Antarctica, this work underscores that the wild relatives of our laboratory workhorses are not mere curiosities but essential yardsticks for measuring how domestication has quietly rewritten one of biology&#8217;s most trusted model systems.</p>
<p><strong>Subject of Research:</strong> Phenotypic and transcriptomic comparison of a wild Mexican C. elegans isolate with contemporary and ancestral N2 laboratory lineages</p>
<p><strong>Article Title:</strong> Life‐History, Stress‐Resistance, and Transcriptomic Variation Among a Mexican Caenorhabditis elegans Isolate and Contemporary and Ancestral N2 Lineages</p>
<p><strong>Article References:</strong> Life‐History, Stress‐Resistance, and Transcriptomic Variation Among a Mexican Caenorhabditis elegans Isolate and Contemporary and Ancestral N2 Lineages. (n.d.). <a href="https://doi.org/10.1002/ece3.74378" rel="noopener noreferrer">https://doi.org/10.1002/ece3.74378</a></p>
<p><strong>Image Credits:</strong> AI Generated</p>
<p><strong>DOI:</strong> <a href="https://doi.org/10.1002/ece3.74378" rel="noopener noreferrer">10.1002/ece3.74378</a></p>
<p><strong>Keywords:</strong> Caenorhabditis elegans, N2 Bristol, laboratory adaptation, wild isolate, lifespan, fertility, stress resistance, transcriptomics, heat shock response, Pseudomonas aeruginosa, oxidative stress, Mexico City</p>
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		<post-id xmlns="com-wordpress:feed-additions:1">232366</post-id>	</item>
		<item>
		<title>UBC study links shorter shelf life to perceptions of naturalness and health</title>
		<link>https://scienmag.com/ubc-study-links-shorter-shelf-life-to-perceptions-of-naturalness-and-health/</link>
		
		<dc:creator><![CDATA[Courtney Benton]]></dc:creator>
		<pubDate>Fri, 02 Oct 2026 11:43:17 +0000</pubDate>
				<category><![CDATA[Bussines]]></category>
		<category><![CDATA[consumer behavior]]></category>
		<category><![CDATA[consumer behavior and food choices]]></category>
		<category><![CDATA[environmental impact of food waste]]></category>
		<category><![CDATA[food shelf life perceptions]]></category>
		<category><![CDATA[food waste]]></category>
		<category><![CDATA[Foods]]></category>
		<category><![CDATA[healthiness of processed foods]]></category>
		<category><![CDATA[impact of shelf life on food perception]]></category>
		<category><![CDATA[influence of shelf life on purchase decisions]]></category>
		<category><![CDATA[Journal of Consumer Psychology]]></category>
		<category><![CDATA[Life]]></category>
		<category><![CDATA[natural]]></category>
		<category><![CDATA[naturalness]]></category>
		<category><![CDATA[naturalness heuristic in food selection]]></category>
		<category><![CDATA[nutrition and food processing levels]]></category>
		<category><![CDATA[perceptions of food freshness and health]]></category>
		<category><![CDATA[role of naturalness in consumer psychology]]></category>
		<category><![CDATA[seen]]></category>
		<category><![CDATA[shelf]]></category>
		<category><![CDATA[shelf life]]></category>
		<category><![CDATA[shorter]]></category>
		<category><![CDATA[UBC]]></category>
		<category><![CDATA[ultra-processed foods]]></category>
		<category><![CDATA[ultra-processed foods health risks]]></category>
		<guid isPermaLink="false">https://scienmag.com/?p=227587</guid>

					<description><![CDATA[A new UBC study reveals that consumers use shelf life as a mental shortcut to judge food naturalness, often preferring shorter-lived products even when they are equivalent in health and nutrition, leading to potential food waste.]]></description>
										<content:encoded><![CDATA[<p>Nutrition experts have long cautioned against the consumption of ultra-processed foods, citing risks such as obesity, cardiovascular disease, and diabetes. In response, many consumers are advised to prioritize more natural food options. However, a new study from the University of British Columbia (UBC) Sauder School of Business suggests that shoppers often rely on a simple heuristic to determine the naturalness of a product: its shelf life. The research indicates that consumers frequently use the duration a product remains fresh as a shorthand for its healthiness, even when this metric is not a reliable indicator of nutritional quality or processing level.</p>
<p>The study, titled “Naturalness against environment-friendliness: The impact of shelf life on food perceptions and purchase decisions,” was published in the Journal of Consumer Psychology. The research team, led by UBC Sauder Associate Professor Dr. Yann Cornil, along with Dr. Dan Liu of Jinan University and Dr. Xiaobing Xu of Hainan University, conducted a series of experiments to explore how shelf life influences consumer perceptions and purchasing behavior. Their findings reveal a complex interplay between the desire for natural foods and the environmental implications of food waste.</p>
<p>In one experimental condition, participants were asked to compare two types of potato chips: one with a five-month shelf life and another with a nine-month shelf life. The results showed that participants consistently rated the chips with the shorter shelf life as more natural and healthier. Conversely, the chips with the longer shelf life were perceived as more environmentally friendly and better for reducing waste. This initial finding established a clear dichotomy in consumer perception, where naturalness and environmental responsibility were viewed as competing priorities.</p>
<p>Further experiments explored how contextual framing affects these decisions. In a study involving pasta sauces with one-year and three-year shelf lives, researchers manipulated the emphasis placed on different values. When participants were reminded of the importance of consuming natural foods, nearly 70 percent chose the sauce with the one-year shelf life. However, when the researchers emphasized the importance of protecting the environment, the preference for the shorter-shelf-life product dropped significantly to 43 percent. This shift demonstrates that consumer choices are highly sensitive to the specific cues provided by marketing or personal values.</p>
<p>The researchers also tested whether providing explicit information could override the shelf-life heuristic. In one scenario, participants were shown mayonnaise jars where the only difference between the shorter and longer shelf-life versions was the packaging; specifically, the longer-lasting version featured a high-performance seal. Despite being informed that the extended shelf life was due to superior packaging rather than additional processing, participants still opted for the mayonnaise with the shorter life when naturalness was the primary concern. This suggests that the mental shortcut associated with shelf life is robust and resistant to logical counter-evidence.</p>
<p>Similar results were observed in tests involving granola bars. Participants were presented with two bars that had nearly identical ingredients and nutritional information but different shelf lives. When the context emphasized naturalness, consumers again preferred the product with the shorter shelf life. These findings highlight that the association between shelf life and naturalness persists even when objective data suggests that the products are equivalent in terms of health and composition. The study underscores the power of peripheral cues, such as shelf life, packaging, and marketing, in shaping consumer judgments.</p>
<p>Dr. Cornil explains that consumers are often overwhelmed by the amount of information available on food labels, including ingredient lists and nutritional facts. In this complex environment, shoppers tend to rely on peripheral cues to make quick decisions. “We provide all the necessary information to make a rational choice&#8230; But it&#8217;s a lot to process,” Dr. Cornil notes. Instead of analyzing every detail, consumers use shelf life as a mental shortcut to infer whether a product is natural. This heuristic, while intuitive, can lead to suboptimal choices that do not align with actual nutritional value or environmental impact.</p>
<p>The study is particularly timely given the high prevalence of ultra-processed foods in modern diets. Approximately 46 percent of Canadians’ daily caloric intake comes from ultra-processed foods, a figure that rises to about 55 percent in the United States. These foods are often derived from substances extracted from sugars, oils, and starches, and are significantly altered from their natural state. They can be high in sodium, saturated fat, and added sugar, while being lower in essential nutrients. As nutrition science shifts its focus from simply limiting fat and sugar to reducing overall processing, the perception of naturalness has become a critical factor in consumer behavior.</p>
<p>While there is some truth to the association between shelf life and processing, Dr. Cornil points out that it is not absolute. Improvements in packaging technology have dramatically extended the shelf life of many foods without increasing their processing level. “To some extent they are correct, because the more you extend the shelf life of a food, the more likely it went through this ultra-processing technique… but not necessarily,” he says. Better packaging, similar to the introduction of refrigeration decades ago, has improved food conservation. However, consumers often overestimate the link between shelf life and naturalness, leading to the unnecessary discarding of food that is still safe and healthy to eat.</p>
<p>The study is the first of its kind to demonstrate the tension between environmental friendliness and naturalness, as well as the strength of the shelf-life heuristic. Dr. Cornil emphasizes that the effect persists even when consumers are provided with nutritional information and explanations about packaging. “The fact that we still find this effect even when we provide nutrition information, and even when we make consumers understand that packaging is responsible for the longer shelf life and not processing, is really interesting,” he says. This misleading heuristic can lead consumers to choose foods that are more likely to be wasted, thereby undermining both health and environmental goals. The findings suggest that future efforts to reduce food waste and improve dietary quality may need to address these deep-seated perceptual biases.</p>
<p><strong>Subject of Research:</strong> Consumer Psychology and Food Science</p>
<p><strong>Article Title:</strong> Foods with shorter shelf life are seen as more natural and healthier: UBC study</p>
<p><strong>Article References:</strong> Foods with shorter shelf life are seen as more natural and healthier: UBC study. (n.d.). <a href="https://www.eurekalert.org/news-releases/1144852" rel="noopener noreferrer">Original publication</a></p>
<p><strong>Image Credits:</strong> AI Generated</p>
<p><strong>DOI:</strong> Not provided</p>
<p><strong>Keywords:</strong> food waste, consumer behavior, shelf life, naturalness, UBC, ultra-processed foods, Journal of Consumer Psychology, Foods, shorter, shelf, life, seen</p>
]]></content:encoded>
					
		
		
		<post-id xmlns="com-wordpress:feed-additions:1">227587</post-id>	</item>
		<item>
		<title>How a Child&#8217;s Growth Curve Could Predict Heart Health Years Later</title>
		<link>https://scienmag.com/how-a-childs-growth-curve-could-predict-heart-health-years-later/</link>
		
		<dc:creator><![CDATA[Ophelia Keating]]></dc:creator>
		<pubDate>Sat, 12 Sep 2026 22:07:53 +0000</pubDate>
				<category><![CDATA[Medicine]]></category>
		<category><![CDATA[BMI curve shapes and long-term health outcomes]]></category>
		<category><![CDATA[cardiometabolic]]></category>
		<category><![CDATA[Child growth patterns]]></category>
		<category><![CDATA[childhood BMI trajectory]]></category>
		<category><![CDATA[childhood obesity and future heart health]]></category>
		<category><![CDATA[Children]]></category>
		<category><![CDATA[course]]></category>
		<category><![CDATA[early childhood development and cardiovascular risk]]></category>
		<category><![CDATA[early indicators of cardiometabolic risk]]></category>
		<category><![CDATA[growth]]></category>
		<category><![CDATA[growth curve analysis in pediatrics]]></category>
		<category><![CDATA[Health]]></category>
		<category><![CDATA[impact]]></category>
		<category><![CDATA[Life]]></category>
		<category><![CDATA[longitudinal birth cohort studies]]></category>
		<category><![CDATA[longitudinal health research in children]]></category>
		<category><![CDATA[markers]]></category>
		<category><![CDATA[patterns]]></category>
		<category><![CDATA[pediatric growth monitoring for disease prevention]]></category>
		<category><![CDATA[perspective]]></category>
		<category><![CDATA[predictive modeling of childhood health]]></category>
		<category><![CDATA[risk factors for childhood cardiometabolic diseases]]></category>
		<category><![CDATA[Scientific Research]]></category>
		<guid isPermaLink="false">https://scienmag.com/?p=199084</guid>

					<description><![CDATA[Every child's growth tells a story, and researchers are learning to read it with remarkable precision. A new study drawing on nearly 1,800 children from a prospective birth cohort in China suggests that the shape of a child's body mass]]></description>
										<content:encoded><![CDATA[<p>Every child&#8217;s growth tells a story, and researchers are learning to read it with remarkable precision. A new study drawing on nearly 1,800 children from a prospective birth cohort in China suggests that the shape of a child&#8217;s body mass index curve from infancy through school age carries powerful signals about future cardiometabolic health. The findings, published in the World Journal of Pediatrics, indicate that children whose growth follows certain high-risk patterns face a dramatically elevated likelihood of clustering multiple cardiovascular risk factors by the time they enter school, with relative risks exceeding sixfold in boys and eightfold in girls compared with their low-risk peers.</p>
<p>The research team, led by investigators at Anhui Medical University, turned to the Ma&#8217;anshan birth cohort, a longitudinal study that has followed children from birth with repeated measurements of body length or height and weight at every follow-up visit. Rather than treating growth as a series of isolated snapshots, the scientists modeled each child&#8217;s body mass index trajectory as a continuous curve spanning the first years of life. This approach allowed them to extract eleven distinct growth markers, including the timing and magnitude of the adiposity peak in infancy, the timing and level of the adiposity rebound in early childhood, the steepness of growth slopes during infancy, toddlerhood, and the preschool and school-age periods, and the cumulative area under the BMI curve across each developmental window.</p>
<p>Two of these markers deserve particular attention because they encode milestones that pediatricians have watched for decades. The adiposity peak is the point in the first year or so of life when a baby&#8217;s BMI reaches its maximum before naturally declining. The adiposity rebound, first described in the 1980s by French researchers as a simple predictor of later obesity, marks the moment when the BMI curve bottoms out and begins climbing again. An early rebound has long been associated with elevated obesity risk, but the new study goes further by embedding these milestones within a comprehensive, quantitative portrait of each child&#8217;s growth across the entire early life course.</p>
<p>To characterize growth patterns rather than individual markers alone, the team applied k-means clustering, an unsupervised machine learning technique that groups children according to the overall similarity of their BMI trajectories. This data-driven classification revealed distinct growth archetypes within the cohort, some of which corresponded to persistently high or rapidly rising BMI across multiple developmental stages. When the researchers examined cardiometabolic outcomes at school age, including waist circumference, blood pressure, blood glucose, and blood lipids, the differences between these archetypes proved striking. Children in high-risk growth patterns were significantly more likely to display clustered cardiometabolic risk factors, a composite indication of emerging metabolic syndrome.</p>
<p>The numbers are arresting. Among boys, membership in a high-risk growth pattern was associated with a relative risk of 6.75 for clustered cardiometabolic risk factors, with a 95 percent confidence interval of 3.81 to 12.92. Among girls, the relative risk climbed to 8.34, with a confidence interval of 4.15 to 18.69. In practical terms, a child whose early growth curve resembles a high-risk archetype faces several times the odds of exhibiting the combined metabolic warning signs, such as central adiposity alongside elevated blood pressure, glucose, or adverse lipid profiles, compared with a child on a low-risk trajectory. Crucially, when the researchers stratified their analyses by obesity status, the associations remained significant, suggesting that the information encoded in growth patterns is not simply a proxy for whether a child is currently obese.</p>
<p>Ten of the eleven growth markers showed significant associations with clustered cardiometabolic risk in both boys and girls. The lone exception was the age at adiposity peak, whose association proved to be sex-specific, a nuance the authors highlight as evidence that growth-related risk may unfold differently along biological sex lines. The remaining markers, spanning the BMI values at peak and rebound, the timing of the rebound, the slopes of BMI gain in infancy, toddlerhood, and later childhood, and the cumulative BMI exposure measured as area under the curve in each period, all carried statistical weight. This breadth implies that no single developmental window holds a monopoly on risk; instead, cardiometabolic vulnerability appears to accumulate across the life course, from the first months of infancy through the transition into school age.</p>
<p>The statistical machinery behind these conclusions reflects the growing sophistication of life-course epidemiology. The team fitted childhood BMI growth curves using linear mixed modeling, a framework well suited to the irregular, repeated measurements that characterize real-world cohort data. The analysis was carried out with the EGGLA R package, an open-source tool for growth curve modeling that the authors make available on GitHub, lowering the barrier for other research groups to adopt the same methodology. By combining flexible curve fitting with clustering and conventional risk estimation, the study demonstrates how modern computational tools can convert routine pediatric measurements, the kind recorded at every well-child visit, into clinically meaningful risk stratification.</p>
<p>What makes the findings compelling is their grounding in a prospective birth cohort rather than retrospective recall. The Ma&#8217;anshan birth cohort has collected anthropometric data from birth onward, meaning the growth curves were constructed from measurements taken as children developed, not reconstructed years later. At school age, the same children underwent direct assessment of cardiometabolic risk factors, creating a temporal chain from early growth to measurable health outcomes. The study was approved by the Committee of Bio-Medical Ethics of Anhui Medical University, and informed consent was obtained from all participants. The cohort itself has been previously described in the International Journal of Epidemiology, and earlier analyses from the same group have examined how birth outcomes and early growth relate to the age at adiposity rebound.</p>
<p>The broader context sharpens the urgency of this work. Cardiovascular disease remains the leading cause of death worldwide, and projections published in the European Journal of Preventive Cardiology anticipate a rising global burden through mid-century. Risk factors that were once considered adult problems, including hypertension, dyslipidemia, and type 2 diabetes, are increasingly documented in children and adolescents, and long-running cohort studies such as Bogalusa have shown that childhood BMI and blood pressure cast long shadows into midlife, influencing adult dyslipidemia, diabetes, and even left ventricular structure. Against this backdrop, identifying modifiable or at least detectable signals in early childhood becomes a public health priority, and growth trajectories are among the most accessible signals available.</p>
<p>The authors conclude that childhood growth patterns and markers across different phases of the life course are closely tied to cardiometabolic health, and they argue that monitoring growth trajectories from infancy onward could enable earlier identification of children at elevated risk. In an era when childhood overweight and obesity are projected to keep climbing globally, the message is that the growth chart pinned to a pediatrician&#8217;s wall may be one of the most underused predictive instruments in preventive medicine. A child&#8217;s curve, read carefully and early, may whisper warnings about the heart long before any symptom appears, offering families and clinicians a window for intervention measured not in decades but in the crucial first years of life.</p>
<p><strong>Subject of Research:</strong> Impact of growth markers and patterns of growth on children’s cardiometabolic health: a life course perspective</p>
<p><strong>Article Title:</strong> Impact of growth markers and patterns of growth on children’s cardiometabolic health: a life course perspective</p>
<p><strong>Article References:</strong> Luo, L., Tong, J., Wang, X., Huang, Q.-Z., Liu, Y.-K., Lv, P., Wang, J., Geng, C., Gao, H., Gan, H., Geng, M.-L., Zhu, B.-B., Tao, S.-M., Wu, X.-Y., Huang, K., Yan, S.-Q., &amp; Tao, F.-B. (2026). Impact of growth markers and patterns of growth on children’s cardiometabolic health: a life course perspective. <em>World Journal of Pediatrics</em>. <a href="https://doi.org/10.1007/s12519-026-01072-z" rel="noopener noreferrer">https://doi.org/10.1007/s12519-026-01072-z</a></p>
<p><strong>Image Credits:</strong> AI Generated</p>
<p><strong>DOI:</strong> <a href="https://doi.org/10.1007/s12519-026-01072-z" rel="noopener noreferrer">10.1007/s12519-026-01072-z</a></p>
<p><strong>Keywords:</strong> Impact, growth, markers, patterns, children, cardiometabolic, health, life, course, perspective, scientific research</p>
]]></content:encoded>
					
		
		
		<post-id xmlns="com-wordpress:feed-additions:1">199084</post-id>	</item>
		<item>
		<title>A mixed-methods study of indoor air quality on children’s respiratory health and quality of life</title>
		<link>https://scienmag.com/a-mixed-methods-study-of-indoor-air-quality-on-childrens-respiratory-health-and-quality-of-life/</link>
		
		<dc:creator><![CDATA[Russell Cooper]]></dc:creator>
		<pubDate>Fri, 11 Sep 2026 06:13:12 +0000</pubDate>
				<category><![CDATA[Climate]]></category>
		<category><![CDATA[air pollution and vulnerable populations]]></category>
		<category><![CDATA[asthma exacerbation from indoor air pollution]]></category>
		<category><![CDATA[Children]]></category>
		<category><![CDATA[children’s respiratory health]]></category>
		<category><![CDATA[community-based participatory research]]></category>
		<category><![CDATA[dust storms and particulate matter]]></category>
		<category><![CDATA[environmental justice and health disparities]]></category>
		<category><![CDATA[Health]]></category>
		<category><![CDATA[health effects of wildfire smoke on children]]></category>
		<category><![CDATA[impact of outdoor weather on indoor air]]></category>
		<category><![CDATA[indoor]]></category>
		<category><![CDATA[indoor air quality]]></category>
		<category><![CDATA[Life]]></category>
		<category><![CDATA[mixed methods]]></category>
		<category><![CDATA[mixed-methods environmental research]]></category>
		<category><![CDATA[photovoice methodology in environmental studies]]></category>
		<category><![CDATA[quality]]></category>
		<category><![CDATA[respiratory]]></category>
		<category><![CDATA[Salton Sea environmental health]]></category>
		<category><![CDATA[Scientific Research]]></category>
		<guid isPermaLink="false">https://scienmag.com/?p=192484</guid>

					<description><![CDATA[On a windy afternoon in the Eastern Coachella Valley, the horizon can vanish behind a wall of dust rolling off the exposed lakebed of California's Salton Sea. For most residents, the haboobs that sweep across this agricultural desert region are]]></description>
										<content:encoded><![CDATA[<p>On a windy afternoon in the Eastern Coachella Valley, the horizon can vanish behind a wall of dust rolling off the exposed lakebed of California&#8217;s Salton Sea. For most residents, the haboobs that sweep across this agricultural desert region are an inconvenience. For the mothers of children with asthma who live along the Sea&#8217;s shrinking shoreline, they are a signal to seal the doors, cover their children&#8217;s faces, and wait out the storm indoors—only to discover that the storm has followed them inside. A new mixed-methods study published in BMC Environmental Science has now quantified what these families have long described from lived experience: when extreme weather strikes outdoors, the air inside their homes degrades dramatically, with particulate matter levels doubling during fires and spiking six-fold during dust storms.</p>
<p>The research, led by Ashley Trinidad and Ann Marie Cheney of the University of California, Riverside, together with atmospheric physicist William C. Porter and community partners, combined hard sensor data with the deeply personal lens of photovoice, a method in which participants photograph their own environments and narrate their meaning. Fifteen Latina mothers, nearly all born in Mexico and many belonging to the Indigenous Purépecha community, took part. Each household received a low-cost MODULAIR-PM air quality monitor placed in the room where the family spent the most time, recording fine and coarse particulate matter—PM2.5 and PM10—at one-minute resolution. The mothers then documented their surroundings with smartphone cameras during two deliberately chosen weekends in March and July 2022, periods selected because meteorological forecasts pointed to likely dust events, and sat for semi-structured interviews about what their images revealed.</p>
<p>The technical findings are stark. During a March garbage fire that erupted within a mile of several participants&#8217; apartment building, indoor PM2.5 concentrations in the nearest homes more than doubled—and remained elevated for days after the blaze was extinguished within 24 hours. In July, a full-blown dust storm known as a haboob drove average indoor PM10 levels in participating homes to six times their typical range, as fine desert sand infiltrated even sealed doors and windows. Because the sensors recorded continuously, the team could distinguish event periods from baseline conditions in each home, comparing daily averages for the longer fire episode and rapid 15-minute intervals for the fast-moving dust storm, an approach that preserved the sharp temporal signature of coarse particles dominating during windblown dust.</p>
<p>But the numbers only tell half the story. The photographs and narratives the mothers produced reveal how environmental degradation becomes embodied in the rhythms of family life. One mother, Sol, photographed a fire near her home and described rushing her three-year-old son inside to protect his lungs, knowing the smoke could trigger an asthma attack. Another, Sabina, captured a windborne plume of smoke visible from miles away and recounted how her thirteen-year-old son began coughing uncontrollably during outdoor activities until she brought him inside and reached for his inhaler. Nora photographed a highway dissolving into brown haze as a dust storm arrived, remarking how a pleasant sunny morning can turn into choking winds by afternoon.</p>
<p>The mothers&#8217; accounts describe dust so fine that it penetrates homes even when windows are shut, accumulating along door cracks and window sills. Noemi photographed the dust blanketing her front doormat and described how her eight-year-old daughter&#8217;s eyes tear up when the wind rises. The caregivers consistently linked the dust to their children&#8217;s asthma, allergies, and nosebleeds. Beyond individual symptoms, the exposures ripple outward into education and employment: children miss school during dusty days, schools send symptomatic children home—sometimes mistaking allergic reactions for contagious illnesses such as COVID-19—and caregivers are forced to leave work, compounding the economic precarity of families already facing disadvantage.</p>
<p>In response, the mothers have developed elaborate strategies of vigilance and avoidance. They keep children indoors when the air smells of rotten eggs—a sulfurous odor associated with the Salton Sea&#8217;s hypersaline, fish-strewn shores—or when heat and wind combine to worsen symptoms. They wrap children&#8217;s heads, throats, and mouths before outings, ration outdoor play, and manage daily regimens of allergy medications and inhalers. The study&#8217;s authors frame these behaviors as rational adaptations to conditions largely outside families&#8217; control, recommending that households in affected regions keep doors and windows closed or sealed with weatherstripping during extreme weather events and use air filters to circulate and clean indoor air.</p>
<p>The setting itself is inseparable from the science. The Salton Sea, California&#8217;s largest body of water, has been sustained for a century by agricultural runoff from the Colorado River, driving its salinity far above ocean levels. Since 2018, Colorado River water has ceased flowing into the Sea, and rising temperatures have accelerated the exposure of its toxic lakebed. As the shoreline recedes, windblown dust from the dried bed has become a growing public health emergency. Prior research cited in the study found that Salton Sea PM10 is particularly harmful, associated with significantly elevated rates of respiratory hospitalization in surrounding communities, and laboratory work showed that aerosolized dust extracts from the drying lake trigger acute neutrophilic lung inflammation in animal models—a distinct innate immune response rather than a typical allergic reaction.</p>
<p>The study also situates these findings within a broader architecture of environmental inequity. Many of the communities near the Sea, including Thermal, North Shore, Mecca, and Oasis, are unincorporated—lacking mayors, city councils, paved roads, sidewalks, clinics, and structurally sound housing with adequate ventilation and insulation. National data show that people of color in the United States experience systematically higher PM2.5 exposure than White populations, shaped by land-use policies, housing patterns, and weak regulatory enforcement. Children are especially vulnerable because their lungs are still developing and they breathe more air relative to body weight than adults. The authors argue that photographs of hazy horizons and dust-caked doorsteps constitute visual evidence of what scholar Rob Nixon terms &#8220;slow violence&#8221;—gradual, dispersed harm that accumulates in bodies and places while remaining invisible to policymakers.</p>
<p>By merging caregiver testimony with objective air quality measurements, the study fills a methodological gap in environmental health research, in which the lived experience of affected communities is rarely paired with standardized exposure data. It also elevates a population—Latino and Indigenous Mexican families—that has been historically underrepresented in environmental health studies. The work was grounded in community-based participatory research, with bilingual community health workers, or promotoras, and a twelve-member community advisory board shaping everything from recruitment to dissemination, and the findings were shared back to the community through a photovoice gallery presented at a public meeting attended by a congressional representative.</p>
<p>The road ahead, the researchers say, involves understanding how housing typologies—trailers, converted sheds, multifamily apartments, and aging mobile homes—mediate indoor air quality, and how seasonal temperature differences between indoors and outdoors govern pollutant infiltration. Evidence already suggests mobile and multifamily housing admits more ambient particulate matter than detached single-family homes. For now, the study&#8217;s message is blunt: policies that improve housing quality, expand environmental health education, and ensure equitable access to air filtration and clinical care are urgently needed to reduce particulate matter exposure for children whose homes offer no true refuge from the dust storm outside.</p>
<p>The biological basis for concern is well established. Particulate matter is classified by diameter, with PM2.5 and PM10 referring to particles smaller than 2.5 and 10 microns respectively. Because of their small size, these particles can bypass the body&#8217;s natural defenses, penetrate deep into lung tissue, and in the finest fraction even enter the bloodstream. Chronic exposure has been linked to asthma exacerbations, reduced lung function, heart attacks, and stroke, making repeated indoor infiltration during dust events a compounding rather than transient hazard for children whose lungs are still developing.</p>
<p>The study&#8217;s indoor findings also connect to a broader literature on housing and exposure pathways. In multi-unit buildings, air moves between apartments through shared hallways, stairwells, ventilation ducts, and gaps around plumbing and electrical systems, meaning that cooking, smoking, or cleaning in one unit can degrade air in neighboring units. Older buildings often have outdated or poorly maintained ventilation, leading residents to rely on open windows for airflow—a practice that improves circulation but draws in outdoor pollutants in areas with high ambient particulate levels. Overcrowding further reduces air exchange and promotes the accumulation of allergens and moisture.</p>
<p>Exposure risks can also travel home from work. Pollutants encountered in occupational settings, such as agricultural dust and chemicals common in low-wage labor, adhere to clothing, shoes, skin, and hair, carrying hazards into households and exposing children indirectly. The researchers note that these layered environmental, occupational, and residential exposures contribute to pulmonary, renal, immunological, and cardiovascular disease, and that community-engaged methods like photovoice remain rare companions to standardized air monitoring despite their value in revealing how families recognize and respond to hazards.</p>
<p><strong>Subject of Research:</strong> A mixed-methods study of indoor air quality on children’s respiratory health and quality of life</p>
<p><strong>Article Title:</strong> A mixed-methods study of indoor air quality on children’s respiratory health and quality of life</p>
<p><strong>Article References:</strong> Trinidad, A., Porter, W. C., Rodriguez, S., Ortiz, G., Pozar, M., &amp; Cheney, A. M. (2026). A mixed-methods study of indoor air quality on children’s respiratory health and quality of life. <em>BMC Environmental Science, 3</em>(1), Article 18. <a href="https://doi.org/10.1186/s44329-026-00060-y" rel="noopener noreferrer">https://doi.org/10.1186/s44329-026-00060-y</a></p>
<p><strong>Image Credits:</strong> AI Generated</p>
<p><strong>DOI:</strong> <a href="https://doi.org/10.1186/s44329-026-00060-y" rel="noopener noreferrer">10.1186/s44329-026-00060-y</a></p>
<p><strong>Keywords:</strong> mixed-methods, indoor, quality, children, respiratory, health, life, scientific research</p>
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		<post-id xmlns="com-wordpress:feed-additions:1">192484</post-id>	</item>
		<item>
		<title>Materialistic Heritage: The Influence of Parental Figures on Children’s Life Goals</title>
		<link>https://scienmag.com/materialistic-heritage-the-influence-of-parental-figures-on-childrens-life-goals/</link>
		
		<dc:creator><![CDATA[Glenn Wilkins]]></dc:creator>
		<pubDate>Fri, 11 Sep 2026 02:12:57 +0000</pubDate>
				<category><![CDATA[Psychology & Psychiatry]]></category>
		<category><![CDATA[Children]]></category>
		<category><![CDATA[connection between materialism and well-being]]></category>
		<category><![CDATA[cultural factors in materialism development]]></category>
		<category><![CDATA[family environment and materialistic attitudes]]></category>
		<category><![CDATA[Figures]]></category>
		<category><![CDATA[Goals]]></category>
		<category><![CDATA[Heritage]]></category>
		<category><![CDATA[impact of parental role models on materialism]]></category>
		<category><![CDATA[influence]]></category>
		<category><![CDATA[influence of parental values on children's life goals]]></category>
		<category><![CDATA[intergenerational transfer of material values]]></category>
		<category><![CDATA[Life]]></category>
		<category><![CDATA[Materialism transmission in families]]></category>
		<category><![CDATA[Materialistic]]></category>
		<category><![CDATA[Parental]]></category>
		<category><![CDATA[parenting styles and children's materialistic orientation]]></category>
		<category><![CDATA[psychological effects of materialistic upbringing]]></category>
		<category><![CDATA[research on materialism and life success goals]]></category>
		<category><![CDATA[role of family climate in consumer behavior]]></category>
		<category><![CDATA[Scientific Research]]></category>
		<category><![CDATA[societal influence on family materialism]]></category>
		<guid isPermaLink="false">https://scienmag.com/?p=192202</guid>

					<description><![CDATA[Materialism does not simply flow from parent to child like an inherited trait, according to a new study published in Trends in Psychology. Instead, researchers report that the family environment acts as a gatekeeper that determines whether parents' materialistic values]]></description>
										<content:encoded><![CDATA[<p>Materialism does not simply flow from parent to child like an inherited trait, according to a new study published in Trends in Psychology. Instead, researchers report that the family environment acts as a gatekeeper that determines whether parents&#8217; materialistic values are actually transmitted to the next generation, and, in turn, whether young people orient their life goals toward money, image, and status. The study, led by Samuel Lins of the Center for Psychology at the University of Porto, together with Maria Almeida Caria of the University of Fortaleza and Cynthia Freitas de Melo of the University of Porto, offers a nuanced picture of how one of consumer culture&#8217;s most consequential value systems takes root in young minds.</p>
<p>Materialistic values, defined by the prominence people place on financial success, possessions, and physical appearance relative to other life priorities, have been extensively linked to poorer well-being. Meta-analytic evidence, including a large 2014 synthesis by Dittmar and colleagues in the Journal of Personality and Social Psychology, shows that a strong materialistic orientation is reliably associated with lower personal well-being. More recent meta-analytic work by Bradshaw and colleagues in 2023 extended this conclusion to the domain of life goals, finding universal wellness costs when people prioritize extrinsic goals over intrinsic ones. Understanding where these values come from, and how they are or are not passed down within families, therefore carries practical significance well beyond academic curiosity.</p>
<p>To probe the mechanisms of value transmission, the research team recruited 208 young adults, of whom 168 were women and 40 were men, with a mean age of 20.20 years and a standard deviation of 6.42 years. Participants, described as being in the stage of emerging adulthood theorized by Jeffrey Arnett, reported on their own materialistic values, their perceptions of their parents&#8217; materialism, the parenting environment they grew up in, and their own life goals. Emerging adulthood is a developmental window in which identity, values, and long-term aspirations are still actively being shaped, making it a strategic period in which to examine the residue of family socialization.</p>
<p>Statistically, the study employed moderated mediation analysis, a regression-based framework popularized by Andrew Hayes that tests whether an indirect effect operates through a mediator and whether that indirect effect changes strength depending on a moderator. In this design, children&#8217;s materialism was modeled as the mediator linking parental materialism to children&#8217;s life goals, while the perceived family environment, specifically whether it was democratic or authoritarian in character, was tested as a moderator of the first path, the link between parental materialism and children&#8217;s own materialism. This architecture allowed the researchers to ask not merely whether parents influence children, but under what relational conditions that influence materializes.</p>
<p>The results delivered a surprise in the direct path. Parental materialism, on its own, did not predict whether the young adult participants endorsed extrinsic life goals centered on wealth, fame, or image. Values transmission, in other words, is not automatic. A materialistic parent does not reliably produce a materialistically driven child simply by existing as a role model. This finding echoes a broader literature on parent-child value similarity, including work by Barni, Knafo-Noam, and Schwartz, which shows that resemblance between parents and children on values is often modest and depends heavily on the quality of the relationship and the socialization context rather than on parental intentions alone.</p>
<p>The critical factor turned out to be the family environment. When participants perceived a democratic family climate, one characterized by warmth, dialogue, negotiation, and responsiveness to the child&#8217;s perspective, the relationship between parental materialism and children&#8217;s materialism was positive. In such homes, materialistic parents apparently modeled and communicated consumer values that children absorbed and internalized. In contrast, under an authoritarian family environment, marked by coercive control, strict demands, and limited open communication, the relationship between parental materialism and children&#8217;s materialism was negative. Children raised in authoritarian households were less likely to adopt their parents&#8217; materialistic orientation, suggesting that value transmission requires a channel of influence that authoritarian climates appear to close.</p>
<p>The interpretation offered by the researchers is that the family environment enables or disables the transmission of materialistic values, and that these values, once adopted, guide young people&#8217;s focus toward extrinsic objectives. Theoretical frameworks from Grusec and Goodnow on value internalization help explain the pattern: children internalize parental values most effectively when they accurately perceive the values&#8217; content and accept them, both of which are fostered by democratic, warm parenting and undermined by coercive discipline that provokes resistance rather than emulation. Related consumer research, such as Richins and Chaplin&#8217;s work on material parenting, similarly shows that how goods are used in the parenting process matters as much as parental attitudes toward possessions themselves.</p>
<p>Why might authoritarian parenting blunt materialistic transmission? One possibility is reactance: adolescents in controlling households may distance themselves from parental models, rejecting values associated with parents they experience as domineering. Another relates to emotional security, since prior research, including Ching and Wu&#8217;s study of parental conflict and adolescent materialism, suggests that insecurity can itself foster materialistic values as a compensatory mechanism, but the dynamics of that compensation may interact with parenting style in complex ways. The moderated mediation results indicate that materialism in children did serve as the conduit through which family conditions ultimately related to extrinsic life goals, meaning that the family climate shaped children&#8217;s materialism, and children&#8217;s materialism in turn shaped the goals they set for their lives.</p>
<p>The study&#8217;s limitations warrant caution in interpretation. The design was cross-sectional and correlational, relying on retrospective perceptions of parenting rather than observed family behavior, so causal direction cannot be firmly established; it is possible, for instance, that shared materialism produces a more relaxed family climate rather than the reverse. The sample was also skewed toward women, and all measures were self-reported by adult children, leaving parental perspectives unmeasured directly. The authors note that data supporting the findings are available from the corresponding author upon request, and the work followed ethical protocols including informed consent.</p>
<p>Nevertheless, the findings carry clear implications. For practitioners and parents concerned about the cultural pull of consumerism, the message is that values are not inherited through instruction alone but through relational climate. Democratic parenting appears to open a channel through which parental values, for better or worse, flow to children, which means the same openness that helps transmit generosity, curiosity, or civic engagement can also transmit materialism. Authoritarian environments, while perhaps limiting materialistic contagion, come with their own well-documented psychological costs. The broader takeaway is a call for intentionality: parents who wish to buffer their children against materialistic values may need to attend not only to their own consumption habits and stated ideals, but to the everyday emotional and communicative fabric of family life in which those values either take root or wither. As societies grapple with the well-being toll of extrinsic goal pursuit documented across cultures, this research suggests that the first and perhaps most powerful arena of intervention remains the home.</p>
<p>The distinction between intrinsic and extrinsic goals traces back to self-determination theory, which holds that aspirations such as personal growth, close relationships, and community contribution tend to satisfy basic psychological needs, whereas pursuits of wealth, fame, and image offer only contingent satisfactions. The present findings suggest that the family is one setting where this goal orientation is calibrated long before individuals make deliberate choices about their priorities.</p>
<p>It is also worth noting that value transmission in families is rarely a one-way street. Research on parent-child value similarity indicates that children actively filter, negotiate, and sometimes reject what parents offer, and that perceived norms within the family shape whether parental messages are heard as genuine convictions or as mere expectations. The democratic climate in this study may function precisely as such a channel, giving children enough access to parental reasoning to reconstruct materialistic values as their own.</p>
<p>Future work could follow families over time, incorporate both parents&#8217; and children&#8217;s reports, and test whether these dynamics hold across cultures with differing levels of consumer development, questions the authors&#8217; data-sharing statement should help address.</p>
<p><strong>Subject of Research:</strong> Materialistic Heritage: The Influence of Parental Figures on Children’s Life Goals</p>
<p><strong>Article Title:</strong> Materialistic Heritage: The Influence of Parental Figures on Children’s Life Goals</p>
<p><strong>Article References:</strong> Lins, S., Caria, M. A., &amp; de Melo, C. F. (2026). Materialistic Heritage: The Influence of Parental Figures on Children’s Life Goals. <em>Trends in Psychology</em>. <a href="https://doi.org/10.1007/s43076-026-00536-5" rel="noopener noreferrer">https://doi.org/10.1007/s43076-026-00536-5</a></p>
<p><strong>Image Credits:</strong> AI Generated</p>
<p><strong>DOI:</strong> <a href="https://doi.org/10.1007/s43076-026-00536-5" rel="noopener noreferrer">10.1007/s43076-026-00536-5</a></p>
<p><strong>Keywords:</strong> Materialistic, Heritage, Influence, Parental, Figures, Children, Life, Goals, scientific research</p>
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		<post-id xmlns="com-wordpress:feed-additions:1">192202</post-id>	</item>
		<item>
		<title>Managing Everyday Life in Double Exposure: Frail Older People’s Experiences During a Pandemic</title>
		<link>https://scienmag.com/managing-everyday-life-in-double-exposure-frail-older-peoples-experiences-during-a-pandemic/</link>
		
		<dc:creator><![CDATA[Kristina Jarvis]]></dc:creator>
		<pubDate>Thu, 03 Sep 2026 20:51:25 +0000</pubDate>
				<category><![CDATA[Medicine]]></category>
		<category><![CDATA[aging and resilience during COVID-19]]></category>
		<category><![CDATA[COVID-19 pandemic impact on frail older adults]]></category>
		<category><![CDATA[double]]></category>
		<category><![CDATA[double exposure effects on elderly during COVID-19]]></category>
		<category><![CDATA[during]]></category>
		<category><![CDATA[elderly adaptation to social distancing measures]]></category>
		<category><![CDATA[Everyday]]></category>
		<category><![CDATA[experiences]]></category>
		<category><![CDATA[experiences of frail seniors in quarantine]]></category>
		<category><![CDATA[Exposure]]></category>
		<category><![CDATA[Frail]]></category>
		<category><![CDATA[intersection of age-related vulnerabilities and pandemic restrictions]]></category>
		<category><![CDATA[lessons]]></category>
		<category><![CDATA[Life]]></category>
		<category><![CDATA[managing]]></category>
		<category><![CDATA[mental health effects of COVID-19 on frail seniors]]></category>
		<category><![CDATA[occupational therapy insights on elderly pandemic experiences]]></category>
		<category><![CDATA[Older]]></category>
		<category><![CDATA[Pandemic]]></category>
		<category><![CDATA[people]]></category>
		<category><![CDATA[public health restrictions and elderly well-being]]></category>
		<category><![CDATA[qualitative study on older people's daily lives during pandemic]]></category>
		<category><![CDATA[Scientific Research]]></category>
		<category><![CDATA[social isolation and vulnerability in older adults]]></category>
		<guid isPermaLink="false">https://scienmag.com/?p=186739</guid>

					<description><![CDATA[When the Covid-19 pandemic swept through the world in early 2020, few groups felt its consequences as profoundly as frail older people. In Sweden, where people aged 70 and older were urged to restrict their social contacts and avoid gatherings,]]></description>
										<content:encoded><![CDATA[<p>When the Covid-19 pandemic swept through the world in early 2020, few groups felt its consequences as profoundly as frail older people. In Sweden, where people aged 70 and older were urged to restrict their social contacts and avoid gatherings, a new qualitative study has now documented in unusual depth how this advice played out in the daily lives of the most vulnerable members of that population. Published in the Scandinavian Journal of Occupational Therapy, the research reveals that frail older people experienced the pandemic not as a single burden but as a form of double exposure, in which their own age-related vulnerabilities intersected with external restrictions to constrain nearly every dimension of everyday life. The findings offer a technical and deeply human picture of what isolation does to people whose capacity to adapt is already diminished, and they carry lessons that extend far beyond any single public health crisis.</p>
<p>The study, conducted within the framework of the larger Swedish randomized controlled CGA Swed trial, set out to explore how frail older people managed everyday life in quarantine during the first year of the pandemic. Frailty, in the clinical sense, refers to a state of reduced bodily function, increased vulnerability, and diminished ability to handle stressors, often assessed through criteria such as general weakness, reduced endurance, weight loss, low physical activity, and slow walking speed. Because frailty markedly increases after the age of 80 and is associated with reduced quality of life, impaired cognition, and heightened risk of depression and pain, the researchers reasoned that this group would experience pandemic restrictions differently from healthier older adults. Yet, until now, in-depth knowledge about the consequences for frail older people specifically remained scarce, leaving a gap in both gerontology and occupational therapy research.</p>
<p>Twenty participants, aged 78 to 100 years and including 11 women and 9 men, were recruited through strategic sampling designed to capture heterogeneity in age, illness, functional ability, and dependence in activities of daily living. Almost all depended on home-help services, two lived in nursing homes, and seven rated their health as good while the rest described it as fair or poor. Because meeting in person posed an unacceptable infection risk, the researchers conducted semi-structured telephone interviews between October 2020 and February 2021, lasting from 11 to 33 minutes with a median of 23 minutes. Notably, recruitment and data collection never occurred digitally, an advantage the researchers highlight given that digital exclusion is itself a barrier for this population. The interviews were transcribed verbatim and analyzed using the qualitative content analysis method described by Graneheim and Lundman, in which meaning units are coded, grouped into categories, and distilled into themes, ultimately yielding one overarching theme and four subthemes.</p>
<p>That overarching theme, everyday life in double exposure, captures the central insight of the study: even before the pandemic, limitations already existed across multiple domains of these participants&#8217; lives as consequences of ageing and illness. Dependence on elder care services could negatively affect control over daily routines, and most participants had already adapted their leisure activities to a reduced capacity. The loss of friends to old age had narrowed social interactions, and reliance on relatives for support had heightened dependence. The restrictions then compounded every one of these pre-existing limitations. Rather than confronting the pandemic from a baseline of healthy autonomy, these older people faced a crisis that amplified vulnerabilities they were already struggling to manage, and their diminished capacity to generate new coping strategies made the disruption especially destabilizing.</p>
<p>The first subtheme, powerlessness under the restrictions, describes the tension between adhering to public health guidance and struggling with its suffocating impact. Participants spoke of the pandemic period as a lost year, a time of living unnaturally under a new set of rules about how to exist. The constraints heightened their awareness of life&#8217;s finite nature and intensified the desire to engage in meaningful occupations, while simultaneously undermining their sense of autonomy and occupational identity. For those in care homes, limitations were particularly severe, with periods when residents could not move through common areas or meet relatives, and when fellow residents died from the virus. One participant described a common room where only three grieving residents remained after many others had died at the same time. Relatives&#8217; opinions also shaped what activities participants felt permitted to pursue, an external control that reinforced feelings of limited agency and left some waiting for something to change without knowing how to influence their situation.</p>
<p>To manage this powerlessness, participants adopted a strategy the researchers termed acceptance and trust in the restrictions. Accepting the necessity and effectiveness of the measures became a way to cope with double exposure, allowing participants to focus on external factors such as vaccination prospects or changing seasons. Strict adherence, including avoiding all social contact, provided a sense of security for some, while others balanced precautions such as masks, sanitizers, and physical distance with continued essential activities. Healthcare was still sought when needed, and routine visits continued. Yet the study uncovered a novel and troubling finding: inconsistent adherence to safety measures among elder care staff, such as variable use of protective equipment, undermined participants&#8217; sense of security and even led some to cancel support services they clearly needed, despite having extensive care needs that limited that option. Over time, pandemic behaviors like distancing and abstaining from handshakes became routine, but adherence occasionally relaxed, with some participants prioritizing physical contact with close relatives over fear of infection, weighing emotional needs against physical risk.</p>
<p>The third subtheme, limitations in everyday life beyond control, documents how the pandemic profoundly restricted activities and deepened boredom. The inability to meet relatives, socialize with friends, or leave the home for everyday societal activities such as shopping, using public transport, or simply sitting on a bench was experienced as particularly restrictive. Shifting social and religious activities to digital platforms was often impossible due to limited technological skills or resources, meaning that lost participation also meant lost routines, health benefits, and intellectual engagement. Dependence on family members introduced further constraints, as feelings of being a burden inhibited participants from expressing their own needs. Practical frictions multiplied; one participant described the difficulty of coordinating a hairdresser visit with home care schedules that had themselves become unpredictable because of pandemic staffing uncertainties. One participant, asked what she did when spontaneous meetings were no longer possible, responded through tears that she simply lay down in bed and fell asleep, calling the situation awful.</p>
<p>Against these losses, the final subtheme, striving for meaningfulness in everyday life, reveals remarkable resilience. Participants adapted leisure activities to fit within restrictions, meeting friends outdoors when weather permitted, maintaining phone contact, and turning to solitary hobbies such as reading, puzzles, radio, crosswords, and television. Some expanded their use of smartphones and tablets to access social media or games, while others relied on relatives for basic digital tasks, but for many, technology remained inaccessible due to lack of access or competence. Crucially, even participants with digital tools did not perceive online interaction as a true replacement for in-person contact, consistent with prior research on occupational disruption. In care settings, the social interaction provided by care staff grew increasingly important, and some participants supported peers facing greater challenges, demonstrating solidarity, such as one resident who gave fruit to and talked with two women who died the very same night.</p>
<p>The authors conclude that frail older people may have limited capability to adapt to new circumstances, make active decisions to influence their situation, and proactively manage their health, which underscores the central role of occupational therapy in mitigating the impact of disrupted everyday life. Occupational therapists, the study argues, are uniquely positioned to identify how frailty constrains activity performance and participation, to co-create modified routines, to enable safe engagement in daily activities, to strengthen social participation through both digital and non-digital means, and to work with families and care staff to stabilize expectations around daily roles. Addressing digital exclusion, ensuring stable and predictable care environments, and strengthening continuity in primary care through designated contact persons emerge as concrete priorities. Perhaps most significantly, the mechanisms identified here, including reduced activity opportunities, disrupted roles, and weakened belonging, operate not only during pandemics but also in ordinary circumstances where illness, mobility limitations, or restricted social networks chronically isolate frail older people. The study&#8217;s findings thus serve as both a record of a lost year and a blueprint for sustaining leisure, connection, and wellbeing in future disruptive events.</p>
<p><strong>Subject of Research:</strong> Managing Everyday Life in Double Exposure: Frail Older People’s Experiences During a Pandemic</p>
<p><strong>Article Title:</strong> Managing Everyday Life in Double Exposure: Frail Older People’s Experiences During a Pandemic</p>
<p><strong>Article References:</strong> Sjöberg, K., Dahlin-Ivanoff, S., Wilhelmson, K., &amp; Andersson Hammar, I. (2026). Managing Everyday Life in Double Exposure: Frail Older People’s Experiences During a Pandemic. <em>Scandinavian Journal of Occupational Therapy, 33</em>(1), Article 1. <a href="https://doi.org/10.1007/s44474-026-00001-7" rel="noopener noreferrer">https://doi.org/10.1007/s44474-026-00001-7</a></p>
<p><strong>Image Credits:</strong> AI Generated</p>
<p><strong>DOI:</strong> <a href="https://doi.org/10.1007/s44474-026-00001-7" rel="noopener noreferrer">10.1007/s44474-026-00001-7</a></p>
<p><strong>Keywords:</strong> Managing, Everyday, Life, Double, Exposure, Frail, Older, People, Experiences, During, Pandemic, scientific research</p>
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		<post-id xmlns="com-wordpress:feed-additions:1">186739</post-id>	</item>
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