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Coffee doesn’t have to keep you awake to disrupt your sleep

4 days 3 hours ago
Caffeine may make sleep less restorative even when you fall asleep normally and stay in bed for eight hours, with EEG recordings revealing fewer of the slow brain waves associated with deep sleep. Individual sensitivity varies dramatically, meaning even caffeine consumed earlier in the day could affect nighttime recovery for some people.

This emerging treatment could help people avoid knee replacement surgery

4 days 3 hours ago
A minimally invasive procedure called genicular artery embolization could offer a new middle ground between conservative treatments and knee replacement for osteoarthritis. By blocking tiny blood vessels associated with inflammation, GAE can significantly reduce pain, with some patients reporting little or no pain afterward. Studies suggest the benefits may last two to four years in people who respond well.

Blood proteomics of menopause map to brain aging and dementia risk

4 days 6 hours ago
Menopause is a hallmark process in biological aging that has been implicated in later neurodegenerative risk, but the pathways underlying this connection remain unclear. Here we used blood proteomics data from several cohorts to identify biological changes associated with menopause and its links to brain aging. In n = 80 rigorously staged (STRAW+10) pre-, peri- and postmenopausal women (aged 43-58 years) with serum NULISAseq proteomics, we show that spontaneous menopause is characterized by...
Madeline Wood Alexander

Cellular senescence and the SASP in skeletal ageing: convergent mechanisms of progressive bone loss in osteoporosis

4 days 6 hours ago
Skeletal ageing involves changes in endocrine regulation, mechanical loading and cellular function that can impair bone remodelling. Cellular senescence and the senescence-associated secretory phenotype (SASP) have emerged as mechanisms that help close this gap. In the ageing bone microenvironment, senescent osteocytes, mesenchymal stem cells, osteoblasts, immune cells, and vascular endothelial cells secrete pro-inflammatory cytokines, chemokines, matrix metalloproteinases, and Wnt antagonists...
Haotian Liu

Blood proteomics of menopause map to brain aging and dementia risk

4 days 6 hours ago
Menopause is a hallmark process in biological aging that has been implicated in later neurodegenerative risk, but the pathways underlying this connection remain unclear. Here we used blood proteomics data from several cohorts to identify biological changes associated with menopause and its links to brain aging. In n = 80 rigorously staged (STRAW+10) pre-, peri- and postmenopausal women (aged 43-58 years) with serum NULISAseq proteomics, we show that spontaneous menopause is characterized by...
Madeline Wood Alexander

Tissue-specific aging clocks map structured aging-modulatory drug-score patterns across 49 human tissue and cell-line categories

4 days 6 hours ago
Aging clocks are typically trained on pooled multi-tissue data, implicitly assuming that aging is uniform across organs. Here we challenge this assumption by constructing 49 transcriptomic clocks across 47 tissue types and 2 cell-line categories from GTEx v8 (948 unique donors contributing to the retained clock categories) using donor-grouped cross-validation. Clocks achieved a median Pearson r of 0.543 (best: artery aorta, r = 0.855). We identified 10,253 unique clock genes, of which 69.2%...
Dongdong Zhang