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DNA replication stress responses are guardians of genomic stability critical during development, hematopoiesis, cancer therapy response, aging and disease suppression. Central to these responses are reversed forks (RF), which are distinct four-way DNA structures formed during DNA replication stalling to protect against toxic DNA lesions. Historically, RF detection relies on specialized electron microscopy, precluding studies within their native cellular context. By harnessing intrinsic...

CONCLUSIONS: We propose that aging affects RFT performance through two dissociable mechanisms. A general decline in multisensory integration increases overall errors symmetrically across tilt angles. The clockwise-specific asymmetry, by contrast, may reflect age-related changes in lateralized visuospatial attention-specifically, the well-documented rightward attentional shift that accompanies healthy aging-which differentially affects the weighting of visual cues for clockwise vs....

Cognitive impairment associated with obstructive sleep apnea (OSA) is more prevalent and severe in the elderly, possibly due to age-related increases in neuronal susceptibility to intermittent hypoxia (IH). As telomere dysfunction is a key driver of cellular aging, this study aimed to characterize the interaction between telomere dysfunction and IH, and to explore the associated molecular alterations. Using telomere-damaged PC12 cells and G3 Tert^(-/-) progeria mice exposed to IH, we assessed...

OBJECTIVE: Cerebral microbleeds (CMBs) are small vascular lesions detectable on MRI and are associated with increased stroke risk and cognitive decline. However, imaging-based diagnosis is limited by cost and accessibility. This study aimed to identify serum protein biomarkers for early CMB diagnosis and to elucidate molecular mechanisms underlying CMB subtypes.

A pair of studies illuminates these humans’ long, hardscrabble existence

Given autonomous control of other software, programs shared private medical details and deleted files without permission

At least 56 cultural sites have been damaged since strikes began in February—but internet blackouts and academic isolation are obscuring the true toll

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BACKGROUND: Evidence, including animal, clinical, and real-world studies in individuals with type 2 diabetes and/or obesity, suggests reduced risk of dementia and Alzheimer's disease after GLP-1 receptor agonist exposure. The evoke and evoke+ trials aimed to investigate the efficacy and safety of oral semaglutide in individuals with early Alzheimer's disease.

Engineered exosomes are modified extracellular vesicles designed to enhance targeting and cargo delivery, and they have been proposed as a therapeutic strategy for Alzheimer's disease. We systematically reviewed preclinical animal studies evaluating engineered exosomes, synthesized evidence from comparisons with disease models and with natural exosomes, and reported the study in accordance with the PRISMA 2020 checklist. Outcomes included spatial learning and memory assessed by the Morris water...

Cognitive aging is a highly heterogeneous process, with some individuals preserving stable cognitive performance across the lifespan while others exhibiting pronounced decline. This marked interindividual variability indicates that chronological age alone is a poor predictor of cognitive health. Rather than reflecting uniform degeneration, cognitive aging emerges from divergent biological trajectories spanning molecular, cellular, and network levels. In this review, we synthesize emerging...

Macrophages serve as major defenders against pathogens, playing a crucial role in the initiation and modulation of immune responses. Age-related decline in macrophage functions is attributed to a complex network of cellular senescence and immunosenescence. The onset of cellular senescence is often a consequence of sustained oxidative stress, which is worsened by immunosenescence. Green tea catechin, epigallocatechin gallate (EGCG), has emerged as a promising candidate for promoting healthy aging...