Aggregator

Scientists have taken a surprising step toward unlocking regeneration in mammals, showing that the ability to rebuild complex body parts may not be lost after all—it may simply be switched off. Using a two-stage treatment, researchers redirected the body’s normal healing response away from scar formation and toward regrowth, successfully restoring bone, joints, ligaments, and tendons after amputation in animal studies.

A Rutgers study suggests GLP-1 drugs such as Ozempic and Wegovy may weaken the link between impulsive tendencies and violent behavior. The surprising finding hints that these medications could affect how people act on impulses, though researchers stress that cause and effect have not been proven.

Vehicle will attempt a daring capture-and-boost mission to extend the life of the Swift observatory

Exposure to a common plastic chemical before and shortly after birth may have lasting effects on behavior. Researchers found that male rats exposed early in life to DEHP—a plasticizer used in products ranging from medical devices to toys—showed significantly higher anxiety as adults, even long after exposure had ended. The animals were more hesitant to explore open spaces and spent more time frozen in place, classic signs of anxiety in rodents.

The Bundibugyo virus only emerged twice before. Now, scientists see a chance to get to know it better

Ancient hunter-gatherers may have contracted the pathogen from marmots

The etiology of Alzheimer's disease (AD) remains unclear but is likely driven by gene-environment interactions. We present a multi-organ untargeted metabolomics atlas (n = 2,271) paired with metagenomics data (n = 666) from two AD transgenic mouse models (3xTg and 5xFAD) under colonized and germ-free conditions. Systems-level analyses revealed clusters of dysregulated molecules across tissues, including carnitines, bile acids, B vitamins, neurotransmitters, and N-acyl lipids. Metabolic shifts...

The etiology of Alzheimer's disease (AD) remains unclear but is likely driven by gene-environment interactions. We present a multi-organ untargeted metabolomics atlas (n = 2,271) paired with metagenomics data (n = 666) from two AD transgenic mouse models (3xTg and 5xFAD) under colonized and germ-free conditions. Systems-level analyses revealed clusters of dysregulated molecules across tissues, including carnitines, bile acids, B vitamins, neurotransmitters, and N-acyl lipids. Metabolic shifts...

The human heart undergoes continuous transcriptional remodeling from development through aging, yet the cellular and regulatory features governing this process remain incompletely defined. Here, we generated a single-nucleus RNA sequencing atlas of 442,239 nuclei from 54 nonfailing myocardial tissues of 29 individuals spanning development, adulthood, and aging, covering left and right ventricles. Across all major cell types, we uncovered coordinated yet cell type-specific transcriptional...

Cerebrospinal fluid circulation through the glymphatic system plays a crucial role in removing metabolic waste from the central nervous system. However, the mechanism underlying the brain-wide glymphatic dynamics is not yet fully understood, in part due to the lack of glymphatic imaging technologies on deep brains. Here, we report a hybrid imaging technology that integrates three-dimensional photoacoustic tomography and ultrasound localization microscopy (3D-PAULM), enhanced by a photoacoustic...

Peripheral tolerance depends on limiting conventional T cell responses to self-antigens. To define the contribution of nutritional factors and related epigenetic regulation, we perform in vivo CRISPR screening and identify the ascorbate transporter Slc23a2 as a key regulator of naive T cell (Tn) reactivity. T cell-specific loss of Slc23a2 reduces intracellular ascorbate, induces regional DNA hypermethylation, enhances differentiation of Tn cells into effector and memory populations, and promotes...

STING is an innate immune adaptor, classically activated by cytosolic DNA via cGAS-cGAMP to induce interferon signaling. Recent studies reveal that STING participates in non-canonical signaling pathways and localizes to the nucleus, where its functions remain poorly understood. In Hutchinson-Gilford Progeria Syndrome (HGPS), a premature aging disease caused by expression of the lamin-A mutant protein 'progerin', STING accumulates in the nucleus and drives chronic inflammation. Here, we show that...

With the global rise in life expectancy, promoting healthy aging has become a central focus in biomedical research. From global initiatives like The World Health Organization's Decade of Healthy Ageing (2021-2030) to local ones, they highlight the need for accessible, non-invasive, and cost-effective tools to monitor aging-related physiological changes. Since the hand skin is an easily accessible tissue, it can offer valuable insights into aging processes, influenced by age, gender, and...

Frailty is a heterogeneous aging phenotype that represents accumulated biological vulnerability among very old adults. How frailty relates to key late-life transitions at advanced ages remains incompletely understood. We examined the longitudinal association between frailty status and a composite endpoint of incident long-term care insurance certification (level ≥ 2) or death, and assessed whether circulating biomarkers (growth differentiation factor-15 [GDF-15] and N-terminal pro-B-type...

CONCLUSIONS: Resistance exercise exerts significant beneficial effects on handgrip strength, ASMI, gait speed, and physical performance, as assessed by the five-times sit-to-stand test, in older adults with sarcopenia.

CONCLUSIONS: Concurrent frailty and depressive symptoms constitute the highest-risk phenotype for cardio-oncology comorbidity in community-dwelling older adults. These findings suggest that combined assessment of frailty and depressive symptoms may improve baseline risk stratification of cardio-oncology comorbidity.

Identification of natural compounds that delay aging and prevent age-related neurodegeneration is a key goal in gerontology. Fucoxanthin, a marine-derived xanthophyll, exhibits potent antioxidant properties, yet its effects on organismal aging and specific molecular mechanisms remain underexplored. Here, we investigated the pro-longevity and neuroprotective effects of fucoxanthin using Caenorhabditis elegans. Fucoxanthin supplementation significantly extended the mean lifespan of wild-type...

A small clinical trial suggests that probiotics may offer a surprising mental health boost for older adults with depression. Seniors who took a daily probiotic alongside their regular antidepressant treatment experienced slightly greater improvements in depression and anxiety symptoms than those who received a placebo.