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Agency will no longer allow K career awards to fund clinical trials

New study is among the first to quantify and explain slavery’s influence in contemporary U.S. health disparities

A large study of more than 5,500 adults over 50 found a striking combination of risk factors: abdominal obesity paired with vitamin D deficiency was linked to a 123% higher risk of death over six years. Each condition was associated with increased risk on its own, but together they appeared to create a dangerous feedback loop, with belly fat reducing the amount of vitamin D available in the bloodstream while low vitamin D may worsen inflammation and other health problems.

Dry conditions forced forest-dwelling primates into the cities, bringing with them mosquitoes—and disease

Many scientists are scrambling to make ends meet and reconsidering their future in research

Researchers have discovered that a gene linked to congenital heart disease acts like an architect for the heart cell’s DNA. Losing just one copy of TBX5 can cause the genome’s carefully folded 3D structure to unravel, disrupting the genes needed to build a healthy heart. The effects can vary from cell to cell, which may help explain why people with the same mutation develop different heart defects. The same hidden mechanism could also play a role in other birth defects.

Orange juice may have a much bigger effect on the body than scientists once realized. Drinking it regularly appears to influence genes tied to inflammation, blood pressure, metabolism, and blood sugar control, while studies have also found improvements in cholesterol and blood vessel health. Researchers suspect natural citrus compounds such as hesperidin may be partly responsible. Even the gut microbiome may benefit.

Biology lies at the core of medicine, pharmacy, public health and longevity. However, in the physical world, biology is often too complex to manipulate and too expensive and risky to tamper with. In this Perspective, we put forward a vision of using AI to model and simulate biology and life. We present our vision on how to address this challenge through the construction of an AI-driven digital organism (AIDO)-a system of integrated multiscale foundation models-in a modular, connectable and...

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The pathogenesis of Alzheimer's disease (AD) involves multiple pathological processes, including β-amyloid (Aβ) deposition, aberrant tau modification, oxidative stress, and neuroinflammation. The molecular interaction mechanism among them remains to be further clarified. Peroxynitrite (ONOO⁻) is a potent oxidizing and nitrating reactive nitrogen species formed from the rapid reaction between nitric oxide and superoxide. It mediates protein nitration, lipid peroxidation, and mitochondrial damage,...

CONCLUSION: Temporal gait components were associated with age primarily through cognition-related pathways and may serve as candidate digital markers of cognitive impairment, although longitudinal validation is required. Interpretation is limited by the cross-sectional design and the restricted representation of individuals with moderate-to-severe dementia.

Intervertebral disc degeneration (IVDD) is a leading global cause of chronic pain and functional impairment. The senescence of endplate chondrocytes (EPCs) associated with the IVDD cascade, with mitochondrial homeostatic imbalance serving as the central pathological key mediator. EPCs inhabit a physiological niche defined by hypoxia, limited nutrients, and high mechanical loads, requiring precise metabolic regulation and mitochondrial quality control. This review integrates recent advances in...

Immunosenescence refers to the progressive decline in immune system functionality associated with aging, with thymic involution identified as a primary driver of this process. The thymus, the central organ for T cell development, begins to atrophy from puberty onward, resulting in a marked reduction in naive T cell output and a significant decrease in the diversity of T cell receptor (TCR) repertoires. This decline compromises the immune system's capacity to mount effective responses against...