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Emerging evidence suggests that creatine, a naturally occurring amino acid derivative and conditionally essential nutrient, may modulate cellular senescence through mechanisms such as enhancing cellular energy homeostasis, mitigating oxidative stress, and influencing key signaling pathways implicated in aging processes. This review critically evaluates the current body of research, highlights existing gaps in the mechanistic understanding, and emphasizes the importance of targeted studies to...

CONCLUSIONS: The changes in end-of-life care models for Chinese older adults are influenced by both age and period effects. The sustainability of the child-centered care model, influenced by filial piety culture, is facing challenges, as the responsibility for end-of-life care has gradually expanded from children to a broader circle of caregivers. Future efforts should focus on developing a care model based on family caregiving, supplemented by formal care services. Additionally, older women and...

CONCLUSIONS AND IMPLICATIONS: Sensory impairments are associated with an increased risk of organic mental disorders, potentially partly mediated by accelerated biological aging, with social support demonstrating a significant moderating effect. The gradient of risk across impairment types and the substantial potential mediating effect of biological age acceleration are consistent with multiple pathways linking sensory and cognitive health. These findings indicate that comprehensive interventions...

Retinal degeneration (RD), a group of progressive diseases marked by the loss of retinal neurons. Aging contributes to the gradual decline in cellular function, which, in turn, exacerbates the pathogenesis of RD through complex molecular mechanisms, including aberrant gene expression, impaired cellular signaling pathways, oxidative stress, and inflammation. The pivotal role of epigenetic histone modifications in mediating the onset and progression of neurological disorders has garnered...

Hematopoietic stem cell (HSC) transplantation offers a cure for a variety of blood disorders, predominantly affecting the elderly; however, its application, especially in this demographic, is limited by treatment toxicity. In response, we employ a murine transplantation model based on low-intensity conditioning protocols using antibody-mediated HSC depletion. While aging presents a significant barrier to effective HSC engraftment, optimizing HSC doses and non-genotoxic targeting methods greatly...

The folate and methionine cycles (Met-C) are regulated by vitamin B12 (B12), obtained exclusively from diet and microbiota. Met-C supports amino acid, nucleotide, and lipid biosynthesis and provides one-carbon moieties for methylation reactions. While B12 deficiency and polymorphisms in Met-C genes are clinically attributed to neurological and metabolic disorders, less is known about their cell-non-autonomous regulation of systemic physiological processes. Using a B12-sensitive Caenorhabditis...

Aging is one of the most prominent risk factors for neurodegeneration, yet the molecular mechanisms underlying the deterioration of old neurons are mostly unknown. To efficiently study neurodegeneration in the context of aging, we transdifferentiated primary human fibroblasts from aged healthy donors directly into neurons, which retained their aging hallmarks, and we verified key findings in aged human and mouse brain tissue. Here we show that aged neurons are broadly depleted of RNA-binding...

Jansen's metaphyseal chondrodysplasia (JMC) is a rare disorder caused by activating mutations in the parathyroid hormone (PTH)/PTH-related peptide (PTHrP) receptor (PTH1R). Patients exhibit short stature, dysmorphic bones, and severe growth plate abnormalities, as well as hypercalcemia, hypercalciuria, hypophosphatemia, and reduced plasma PTH levels. Humanized PTH1R (hPTH1R) mice expressing the H223R-hPTH1R JMC mutation die early without breeding. We therefore generated and characterized a...

Bisphenol A (BPA) substitutes are widely used as food contact materials and consumer products, while the effects of pathophysiologically relevant concentrations of BPA substitutes on aging remain unclear. In this study, we used Caenorhabditis elegans (C. elegans) to investigate the effects of five BPA substitutes [bisphenol S (BPS), bisphenol B, bisphenol F (BPF), tetramethyl BPF, and 4,4'-(Perfluoropropane-2,2-diyl)diphenol] at pathophysiologically relevant exposure levels during aging and...

Recent advances in isolating cells based on visual phenotypes have transformed our ability to identify the mechanisms and consequences of complex traits. Micronucleus (MN) formation is a frequent outcome of genome instability, triggers extensive changes in genome structure and signaling coincident with MN rupture, and is almost exclusively defined by visual analysis. Automated MN detection in microscopy images has proved challenging, limiting discovery of the mechanisms and consequences of MN....

The loss of bone volume during aging is common in both men and women and can have substantial negative health impacts. Weakened bones can lead to fractures which in turn can result in hospitalization, decreased quality of life, and early death. The post-diagnosis treatment of osteoporosis has received the bulk of attention with less research focused on prevention and modifiable risk factors such as nutrition. Calcium and vitamin D supplementation has provided limited skeletal benefit in healthy...

A major aging hallmark is the accumulation of cellular senescence burden. Over time, senescent cells contribute to tissue deterioration through chronic inflammation and fibrosis driven by the senescence-associated secretory phenotype (SASP). The human ovary is one of the first organs to age, and prominent age-related fibroinflammation within the ovarian microenvironment is consistent with the presence of senescent cells, but these cells have not been characterized in the human ovary. We thus...

Rapid transmission through sexual networks raises fears of wider spread in the region