Aging & Longevity
An integrated transcriptomic analysis of brain aging and strategies for healthy aging
CONCLUSION: The downregulation of many genes is a major contributor to brain aging and neurodegeneration. High levels of physical activity have been shown to effectively reactivate these genes, making it a promising strategy to slow brain aging.
Impairment of lipid homeostasis causes lysosomal accumulation of endogenous protein aggregates through ESCRT disruption
Protein aggregation increases during aging and is a pathological hallmark of many age-related diseases. Protein homeostasis (proteostasis) depends on a core network of factors directly influencing protein production, folding, trafficking, and degradation. Cellular proteostasis also depends on the overall composition of the proteome and numerous environmental variables. Modulating this cellular proteostasis state can influence the stability of multiple endogenous proteins, yet the factors...
EEG brain networks modulation during sleep onset: the effects of aging
The aim of the present study is to investigate differences in brain networks modulation during the pre- and post-sleep onset period, both within and between two groups of young and older individuals. Thirty-six healthy elderly and 40 young subjects participated. EEG signals were recorded during pre- and post-sleep onset periods and functional connectivity analysis, specifically focusing on the small world (SW) index, applied to EEG data (i.e., frequency bands) was examined. Significant...
Variation in brain aging: A review and perspective on the utility of individualized approaches to the study of functional networks in aging
Healthy aging is associated with cognitive decline across multiple domains, including executive function, memory, and attention. These cognitive changes can often influence an individual's ability to function and quality of life. However, the degree to which individuals experience cognitive decline, as well as the trajectory of these changes, exhibits wide variability across people. These cognitive abilities are thought to depend on the coordinated activity of large-scale networks. Like...
A novel 14mer peptide, T14, is associated with age-dependent behaviour in female mice
Age-related cognitive decline presents a healthcare challenge. While age-related mechanisms are mainly studied in humans, animal models provide key insights. Despite evidence of sex-specific differences in aging and cognition, the impact of age on female rodent behaviour is underexplored. This study investigated age-related behavioural changes in female C57BL/6 mice over 8 months, alongside neurochemical markers amyloid, Tau, and T14, a novel peptide from acetylcholinesterase (AChE) that...
The interplay of NAD and hypoxic stress and its relevance for ageing
Nicotinamide adenine dinucleotide (NAD) is an essential regulator of cellular metabolism and redox processes. NAD levels and the dynamics of NAD metabolism change with increasing age but can be modulated via the diet or medication. Because NAD metabolism is complex and its regulation still insufficiently understood, achieving specific outcomes without perturbing delicate balances through targeted pharmacological interventions remains challenging. NAD metabolism is also highly sensitive to...
Development and Validation of a Nutritional Frailty Phenotype for Older Adults Based on Risk Prediction Model: Results From a Population-Based Prospective Cohort Study
CONCLUSIONS AND IMPLICATIONS: A novel nutritional frailty phenotype may have direct implications for decreasing risk of adverse outcomes in older adults. Weakness and slowness play a major role in the progression of nutritional frailty, emphasizing that nutritional supplementation combined with exercise may be one of the feasible pathways to prevent or delay adverse outcomes.
A unique inflammaging profile generated by T cells from people with obesity is metformin resistant
The alarmingly high prevalence of obesity in older adults coupled with the negative health effects of chronic inflammation in both obesity and aging highlight the importance of studies investigating the impacts of obesity on age-related inflammation. Since shifts in peripheral T-cell metabolism and function drive systemic inflammation in both obesity and aging, we hypothesize that obesity impacts the Th17-dominated inflammaging profile we identified in lean subjects and thus modifies the...
The evaluation of depression prevalence and its association with obesity phenotypes in a community-dwelling aged population
CONCLUSION: We did not observe a meaningful association between depressive symptoms and obesity phenotypes. Also, other than malnutrition or its risk, various severities of depressive symptoms correlate with different sociodemographic and medical risk factors among male and female senior citizens.
Different effects of fatty acid oxidation on hematopoietic stem cells based on age and diet
Fatty acid oxidation is of uncertain importance in most stem cells. We show by ^(14)C-palmitate tracing and metabolomic analysis that hematopoietic stem/progenitor cells (HSPCs) engage in long-chain fatty acid oxidation that depends upon carnitine palmitoyltransferase 1a (CPT1a) and hydroxyacyl-CoA dehydrogenase (HADHA) enzymes. CPT1a or HADHA deficiency had little or no effect on HSPCs or hematopoiesis in young adult mice. Young HSPCs had the plasticity to oxidize other substrates, including...
Poor sleep quality is associated with probable sarcopenia in community-dwelling older adults: Results from the longevity check-up (lookup) 8
CONCLUSIONS: Poor sleep quality is associated with increased likelihood of probable sarcopenia in older adults. This finding highlights the importance of addressing sleep quality in interventions aimed at preventing sarcopenia and promoting healthy aging.
Editorial for the special issue on "microbiomes in extremes of aging"
This special issue of the Journal of Experimental Gerontology explores the dynamic interplay between microbiomes and aging-related conditions. The four selected studies highlight the role of microbiota in Alzheimer's disease, cancer immunotherapy, myocardial infarction and tryptophan metabolism, providing insights into how microbiomes influence health and disease in aging. These studies underscore the potential for microbiome-targeted interventions to mitigate aging-related disorders and improve...
Association between number of functional teeth and physical function among community-dwelling older adults: Korean Frailty and Aging Cohort Study
CONCLUSIONS: Fewer functional teeth were associated with low physical function in older adults. Our results emphasize the importance of maintaining adequate functional teeth to preserve physical function in community-dwelling older adults.
Features of effective hospital fall prevention trials: an intervention component analysis
CONCLUSION: Tailored fall prevention approaches and involving patient and family in fall prevention through increasing awareness, in addition to integration with the local intervention setting, appear to play a role in impacting the effectiveness of fall prevention interventions. These theories should be considered in the design of future fall prevention programs and trials and require further evaluation in high quality trials.
Mitochondrial respiration atlas reveals differential changes in mitochondrial function across sex and age
Organ function declines with age, and large-scale transcriptomic analyses have highlighted differential aging trajectories across tissues. The mechanism underlying shared and organ-selective functional changes across the lifespan, however, still remains poorly understood. Given the central role of mitochondria in powering cellular processes needed to maintain tissue health, we therefore undertook a systematic assessment of respiratory activity across 33 different tissues in young (2.5 months)...
Mapping mitochondrial aging
Measuring mitochondrial respiration in frozen tissue samples provides the first comprehensive atlas of how aging affects mitochondrial function in mice.
Investigating cognitive impairments and hippocampal proteome alterations in aged male rats with TAA-Induced minimal hepatic encephalopathy
The aging population faces a gradual decline in physical and mental capacities, with an increased risk of liver cirrhosis and chronic liver diseases leading to hepatic encephalopathy (HE). The intertwining of physiological manifestations of aging with the pathophysiology of HE significantly impairs cognitive ability, reduces quality of life, and increases mortality. Hence, effective therapeutic intervention is imperative. The present study investigated the impact of minimal HE (MHE) on cognitive...
Quercetin preserves mitochondria-endoplasmic reticulum contact sites improving mitochondrial dynamics in aged myocardial cells
Cardiomyocyte senescence plays a crucial role in the pathophysiology of age-related cardiovascular disease. Senescent cells with impaired contractility, mitochondrial dysfunction, and hypertrophic growth accumulate in the heart during aging, contributing to cardiac dysfunction and remodeling. Mitochondrial dynamics is altered in aging cells, leading to changes in their function and morphology. Such rearrangements can affect the spatially restricted region of the mitochondrial membrane that...
Extreme longevity may be the rule not the exception in Balaenid whales
We fit ongoing 40+-year mark-recapture databases from the thriving southern right whale (SRW), Eubalaena australis, and highly endangered North Atlantic right whale (NARW), Eubalaena glacialis, to candidate survival models to estimate their life spans. Median life span for SRW was 73.4 years, with 10% of individuals surviving past 131.8 years. NARW life spans were likely anthropogenically shortened, with a median life span of just 22.3 years, and 10% of individuals living past 47.2 years. In the...
Community-based physical and social activity for older adults with mild frailty: a rapid qualitative study of a collaborative intervention pilot
CONCLUSIONS: Our findings suggest that community-based physical and social activity interventions targeting frailty may be acceptable, feasible and useful. Further work is needed to investigate the impact of such programmes on health and service utilisation. Efforts should be targeted at improving the potential for long-term sustainability of programmes and their impacts.
Aging and Longevity: Latest results from PubMed
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