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Epigenetic aging and cancer incidence in a German cohort of older adults

3 days 3 hours ago
Rising life expectancy and an aging population highlight the importance of cancer control. DNA methylation (DNAm)-based biological age (BA) may provide insights into aging, carcinogenesis, and cancer prevention and care. We estimated five BA metrics among 1916 participants aged 50-75 years at baseline in the German ESTHER cohort, with repeat BA measurements available for 894 participants after 8 years. Multivariable linear regression was used to assess associations between prior cancer and...
Qiming Yin

The p21 resilience network: a conceptual framework linking senescence to ferroptosis and cuproptosis resistance

3 days 3 hours ago
We reconceptualize p21 as the master regulator of a "resilience network" that empowers cancer cells to defy therapy. Beyond cell cycle arrest, p21 orchestrates a multi-faceted defense, suppressing ferroptosis and cuproptosis by governing redox and metal ion homeostasis. This perspective demands a therapeutic paradigm shift: targeting the p21 network is essential to dismantle this evolved survival machinery and force durable tumor regression in resistant cancers.
Shantanu Gupta

Effects of daily multivitamin-multimineral and cocoa extract supplementation on epigenetic aging clocks in the COSMOS randomized clinical trial

3 days 3 hours ago
Large-scale randomized trials have found that multivitamin-multimineral (MVM) supplements and cocoa flavanols may benefit several age-related chronic conditions among older adults, but it remains unclear whether these two supplements directly slow the biological aging process. This prespecified ancillary study evaluated the 2-year effect of a daily MVM (Centrum Silver) and cocoa extract (500 mg cocoa flavanols per day, including 80 mg (-)-epicatechin) on five DNA methylation measures of...
Sidong Li

Graded normobaric hypoxia alters cerebral oxygenation and cognition in middle-aged adults: a single-blind counterbalanced randomized crossover trial

3 days 3 hours ago
Aging is associated with reduced cerebrovascular reactivity and impaired neurovascular coupling, limiting the brain's ability to maintain adequate oxygen delivery during physiological stressors such as hypoxia. These vascular changes may heighten middle-aged adults' vulnerability to hypoxia-induced neural and cognitive impairments, yet dose-response data integrating cerebral oxygenation and cognition remain scarce. In a single-blind, randomized crossover trial, 16 participants completed four...
Ayoub Boulares

Development and characterization of experimental beta-cell senescence models revealing autophagy defects and altered stimulus-secretion coupling

3 days 3 hours ago
Aging is a major contributor to β-cell dysfunction in type 2 diabetes, with cellular senescence increasingly recognized as an important underlying mechanism. Here, we established a doxorubicin (DOX)-induced senescence model using MIN6 mouse insulinoma β-cell line to elucidate the mechanisms by which senescence remodels organelle homeostasis and insulin secretion. Senescence was validated by senescence-associated β-galactosidase positivity, p16^(INK4a)/p21/p53 upregulation, and cell cycle arrest....
Nanxiang Yin