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Cellular senescence is a complex biological process that plays a pathophysiological role in aging and age-related diseases. The biological understanding of senescence at the cellular and tissue levels remains incomplete due to the lack of specific biomarkers as well as the relative rarity of senescent cells, their phenotypic heterogeneity and dynamic features. This Review provides a comprehensive overview of multiomic approaches for the characterization and biological understanding of cellular...

Aging occurs at different rates across individuals and physiological systems, but most epigenetic clocks provide a single age estimate, overlooking within-person variation. Here we developed systems-based DNA methylation clocks that measure aging in 11 distinct physiological systems-Heart, Lung, Kidney, Liver, Brain, Immune, Inflammatory, Blood, Musculoskeletal, Hormone and Metabolic-using data from a single blood draw. By integrating supervised and unsupervised machine learning with clinical...

Post-traumatic stress disorder (PTSD) and depressive symptoms Have been linked to cognitive functioning. However, the impact of PTSD and depression on cognitive functioning, especially among middle-aged urban adults, is not well understood. Cross-sectional data were analyzed from 1434 participants from the Healthy Aging in Neighborhoods of Diversity across the Life Span study. We used multivariable adjusted linear regression and structural equation models (SM) to test the association between...

Genome-wide association studies (GWASs) have been performed on multiple epigenetic clocks to understand the genetic underpinnings of epigenetic age acceleration (EAA). To explore ethnic differences and individual variability in Asian populations, we conducted a GWAS of EAA using multiple epigenetic clocks in the Korean population. Genome-wide single-nucleotide polymorphism (SNP) and methylation data were obtained from 1962 Korean individuals. Five epigenetic clocks (Hannum, DNAm PhenoAge,...

CONCLUSION: Older adult informal caregivers are a vulnerable subgroup at a higher risk of loneliness compared to non-caregivers. Although informal caregiving does not impact social networks, older adult informal caregivers experience loneliness, i.e., a perceived discrepancy between their actual and desired social relationships. Our study suggests the need for further examination of the underlying mechanisms between informal caregiving at older ages and loneliness, as well as a special focus on...

CONCLUSION: These findings demonstrate that shift work is associated with accelerated apparent brain aging, even after controlling for systematic model bias and demographic covariates. The observed reduction in BAG with extended shift work exposure may reflect adaptive or selective effects, emphasizing the need for longitudinal studies to clarify these mechanisms. This research highlights the importance of incorporating occupational exposures in neuroimaging and brain health investigations.

The aging brain undergoes complex neuroinflammatory changes that are increasingly recognized as contributing factors to the development and progression of neurodegenerative diseases. Emerging research reveals that biological sex profoundly shapes these neuroinflammatory dynamics, resulting in distinct trajectories of immune function, glial activity, and neural vulnerability in males and females. This mini-review focuses on recent advances in understanding the interplay of hormonal, genetic, and...

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