Aggregator

How the nucleolus recovers from acute proteostatic stress, particularly in multinucleate syncytia, remains poorly understood. In the highly polarized hyphae of the model filamentous fungus Magnaporthe oryzae, we uncover a novel stress-induced spatial quality control pathway that promotes the inheritance of rejuvenated nucleolar material during nuclear division. This pathway discriminates between newly formed and damaged nucleolar compartments, selectively partitioning and sequestering the...

Transcriptome-wide association studies (TWAS) have successfully identified genes associated with complex traits and diseases, but most have been performed using bulk gene expression data, which aggregate signals across heterogeneous cell types. Population-scale single-cell RNA sequencing data now make it possible to perform TWAS at the cell-type resolution, but present unique challenges due to strong noises, technical variations, and high sparsity. Here, we propose scTWAS, a statistical method...

The redox theory of aging proposes that an oxidative imbalance, possibly amplified by infection, drives senescence. We experimentally evolved mosquitoes under early or late reproduction with or without parasite exposure, and quantified longevity, fecundity, and redox markers. Although selection generated the expected life-history divergence, there was only a poor, non-linear association between a redox gradient and longevity. Thus, oxidative stress contributed to, but did not determine, the...

Vascular dysfunction, including endothelial cell (EC) senescence and hypertension, is a hallmark of metabolic syndrome, yet its underlying mechanisms remain unclear. Here, we show that metabolic stress upregulates regulated in development and DNA damage response 1 (REDD1), driving vascular dysfunction. Overexpression of REDD1, but not the REDD1^(KK219/220AA) mutant, which cannot activate atypical NF-κB, promotes EC senescence and hypertension through NF-κB-dependent induction of miR-155-5p and...

Senescent cells (SnCs) are increasingly recognized as key contributors to osteoarthritis, with conventional strategies centered on their elimination. However, senolytic approaches face mounting limitations, driving the need for refined interventions. Here, we exploit SnCs' lipid metabolic signature to develop a senotherapeutic strategy. Given the universal lipid accumulation in SnCs and the dual role of lipids as both metabolic liabilities and essential lubricants, we engineer an injectable...

No abstract

No abstract

No abstract

Normal aging leads to regional vascular and neural alterations. Age-related impairments in neurovascular coupling (NVC) affect the blood-oxygen-level-dependent (BOLD) hemodynamic response function (HRF) measured with functional magnetic resonance imaging, causing changes in both amplitude and temporal dynamics. Previously, global, systematic age-related changes in HRF characteristics were demonstrated, consistent with known microvascular aging effects. In this follow-up study, a standard space...

Fossil finds suggest nearly 80% of life on Earth died some 550 million years ago

Trump’s pullout from WHO bars federal scientists from working with the International Agency for Research on Cancer and could slash its funding

$1 billion AXIS proposal fell victim to agency upheaval, principal investigator says