Aging & Longevity

No abstract

Paraneoplastic syndrome represents severe and complex systemic clinical symptoms manifesting in multiple organs of cancer patients, but its cause and cellular underpinnings remain little explored. In this study, establishing a Drosophila model of paraneoplastic syndrome triggered by tumor transplantation, we found that the innate immune response, initiated by translocated commensal bacteria from a compromised intestine, significantly contributes to reduced lifespan in tumor-bearing hosts. Our...

Aging is the major risk factor for neurodegeneration and is associated with structural and functional alterations in white matter. Myelin is particularly vulnerable to aging, resulting in white matter-associated microglia activation. Here we used pharmacological and genetic approaches to investigate microglial functions related to aging-associated changes in myelinated axons of mice. Our results reveal that maladaptive microglia activation promotes the accumulation of harmful CD8^(+) T cells,...

CONCLUSIONS: This study provides new insights into the associations between specific IADL activities and cognitive function domains among Chinese older adults. Concentrate on monitoring limitations related to "Use public transit," "Make food" and "Walk 1 km," and promoting broader life-space mobility may be beneficial to preventing the decline of cognitive function. The findings underscore the importance of targeting interventions not only by specific cognitive domains, but also potentially by...

Stiffening of the aorta is a key antecedent to cardiovascular diseases (CVD) with aging. Age-related aortic stiffening is driven, in part, by cellular senescence-a hallmark of aging defined primarily by irreversible cell cycle arrest. In this study, we assessed the efficacy of 25-hydroxycholesterol (25HC), an endogenous cholesterol metabolite, as a naturally occurring senolytic to reverse vascular cell senescence and reduce aortic stiffness in old mice. Old (22-26 months) p16-3MR mice, a...

Changes to improve waiver access to adults aging solo.

Few animals have the cognitive faculties or prehensile abilities needed to eliminate tooth-damaging grit from food surfaces. Some populations of monkeys wash sand from foods when standing water is readily accessible, but this propensity varies within groups for reasons unknown. Spontaneous food-washing emerged recently in a group of long-tailed macaques (Macaca fascicularis) inhabiting Koram Island, Thailand, and it motivated us to explore the factors that drive individual variability. We...

T-cell metabolism is a key regulator of immune function. Metabolic dysfunction in T cells from young mice results in an aged phenotype, accelerating immunosenescence. Physical activity (PA) maintains T-cell function and delays immunosenescence in older adults, but the underlying mechanisms are poorly understood. We investigated the effects of PA on the metabolic and functional profiles at a single-cell resolution of resting and stimulated T cells from young adults (N = 9, 23 ± 3 years) and...

BACKGROUND: We examined the efficacy of physical exercise with nutritional lectures in preventing cognitive decline among older adults.

Alzheimer's disease (AD) is a neurodegenerative condition associated with aging. As the population ages, the incidence of AD has risen annually, making it the fourth leading cause of death, following cardiovascular disease, cancer, and stroke. The main pathological features of AD are now thought to include the accumulation of extracellular amyloid-β (Aβ) plaques, the formation of intracellular neurofibrillary tangles, and a reduction in synaptic connections in the cerebral cortex and...

CONCLUSION: The comprehensive clinical use of multiple laboratory biomarkers can contribute both to the early identification of trajectories of cognitive and functional decline in older adults, and to the identification of mechanisms underlying the effect of multidisciplinary interventions on age-related pathological processes.

The salivary gland (SG) is vital for oral function and overall health through secretion of saliva. However salivary dysfunction due to aging, medications, autoimmune disorders, and cancer treatments poses significant challenges. We established the first diverse and clinically annotated salivary regenerative biobank at Mayo Clinic to study salivary gland stem/progenitor cells (SGSPCs). Optimization of cell isolation and progenitor assays revealed SGSPCs enriched within the CD24/EpCAM/CD49f+ and...

Lymph nodes (LN) are the key organs in charge of long-term maintenance of naïve lymphocytes and their initial, primary activation upon infection. Accumulating evidence indicates that LN stromal cells undergo degenerative changes with aging that critically impair LN function, including the generation of protective primary immune responses. The nature of these defects remains incompletely understood. We here demonstrate that age-related LN stromal changes manifest themselves in mitochondrial...

CONCLUSIONS: ICs generally accepted the use of CR, but they also reported some concerns about using CR for implement. In order to support the safe, equitable, and people-oriented implementation of CR in the long-term care system, we propose consider the ICs' attitudes to optimize CR, offer more technical support to IC, and find a way to balance the conflict of use right between IC and their care recipients in the use of CR.

The sense of smell is essential for human perception. Olfactory function declines with increasing age, affecting a substantial portion of the elderly population, and this decline is more pronounced in men. This reduction can be attributed to anatomical and degenerative changes in the brain and olfactory receptors. There is robust clinical evidence indicating an association between olfactory perception decline/deficit (OPD) and major neurodegenerative diseases, with severe deficits observed in...

CONCLUSIONS: These findings identify self-perceptions of aging as a strong predictor of physical recovery and disability following a fall, independent of other important factors such as age, gender, and pre-fall physical function. These novel observations advance our understanding of the psychological factors impacting physical recovery from a fall. Future work should explore if targeting such perceptions can directly improve physical recovery and outcomes following a fall.

Skeletal muscle undergoes many alterations with aging. However, the impact of aging on muscle's ability to secrete myokines and its subsequent effects on the body remain largely unexplored. Here, we identify myokines that have the potential to ameliorate age-related muscle and bone decline. Notably, circulating levels of cardiotrophin-like cytokine factor 1 (CLCF1) decrease with age, while exercise significantly upregulates CLCF1 levels in both humans and rodents. Restoring CLCF1 levels in aged...

Maladaptive proximal tubular (PT) epithelial cells have been implicated in progression of chronic kidney disease (CKD), however the complexity of epithelial cell states within the fibrotic niche remains incompletely understood. Hence, we integrated snRNA and ATAC-seq with high-plex single-cell molecular imaging to generate a spatially-revolved multiomic atlas of human kidney disease. We demonstrate that in injured kidneys, a subset of HAVCR1^(+)VCAM1^(+) PT cells acquired an inflammatory...

Current approaches used to track stem cell clones through differentiation require genetic engineering^(1,2) or rely on sparse somatic DNA variants^(3,4), which limits their wide application. Here we discover that DNA methylation of a subset of CpG sites reflects cellular differentiation, whereas another subset undergoes stochastic epimutations and can serve as digital barcodes of clonal identity. We demonstrate that targeted single-cell profiling of DNA methylation⁵ at single-CpG resolution can...

CONCLUSIONS: This study identified the prevalence and specific patterns of multimorbidity among older hospital dental patients, providing essential insights for dental professionals to enhance service provision and manage complex multimorbidity cases.