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The functional decline of the hematopoietic system during aging affects organismal function and contributes to reduced healthspan. Quantifying hematopoietic aging holds great scientific and clinical relevance. Alterations in chromatin architecture are a well-established hallmark of aging that encode rich and informative signatures of the aging process, yet they remain largely unexplored as quantitative markers. Here, we present an interpretable deep learning approach based on convolutional...

Autophagy is widely proposed to decline with age; however, direct evidence across human cell types remains limited. Moreover, it is unclear whether age-associated changes in autophagy-gene transcription are accompanied by corresponding changes in autophagic activity, and whether autophagic activity relates to physiological function during aging. We performed transcriptomic and functional autophagy analyses across subject-matched human cell types from a healthy aging cohort. Autophagy-related...

A large health-record analysis found that glucosamine use was associated with a 25% higher likelihood of mild cognitive impairment progressing to dementia. Lab experiments suggest the popular joint supplement may intensify an abnormal sugar-tagging process in the Alzheimer’s brain, although researchers say clinical trials are needed to determine whether it actually causes harm.

Direct oral anticoagulants cut the risk of serious clinical events by 69% in atrial fibrillation patients with an intermediate risk of stroke, according to the randomized SINGLE-AF trial. The benefit was driven mainly by fewer ischemic strokes, with no increase in major bleeding.

A single dose of an experimental CRISPR therapy cut LDL cholesterol and triglycerides by about half in patients with difficult-to-treat lipid disorders. The reductions were still present one year later, with the highest dose lowering LDL by 52.5% and triglycerides by 47.8%.

Pain and fatigue in rheumatoid arthritis can persist even after inflammation improves, with depression, poor sleep, obesity, smoking, and chronic pain potentially helping sustain symptoms. Researchers say identifying these hidden drivers could prevent unnecessary medication changes and lead to more personalized treatment.

Nematode growth medium (NGM) has been the standard culture medium for Caenorhabditis elegans (C. elegans) for over five decades and contains peptone to support proliferation of the bacterial food source, Escherichia coli OP50. However, the increasing use of paraformaldehyde (PFA)-killed OP50 in studies of metabolism, aging, and host-microbe interactions raise the question of whether peptone remains necessary once bacterial proliferation has been eliminated. Here, we systematically compared...

This study examined the impact of nine years of continued cycling exercise on physiological function in older exercisers, viewed as a model of inherent biological aging free from the negative effects of inactivity. A range of cardiorespiratory indices were measured, with peak oxygen consumption (V̇O(2peak)) as the primary outcome. Of an original 125 cyclists first assessed in 2012-2013, 82 (53 males, 29 females) returned 9 years later (aged 64-86 years at follow up). V̇O(2peak) declined by 19.7%...

Eccentric exercise is widely used in rehabilitation protocols for older adults. However, the age-related behavior of the muscle-tendon unit (MTU) during eccentric actions remains incompletely understood, especially regarding muscle-tendon decoupling and its influence on fascicle dynamics and force production. Better characterizing these mechanisms would help optimize the design of rehabilitation protocols in older individuals. This study aimed to investigate age-related differences, while...

DNA storage is a promising solution to data explosion due to its high density and longevity. However, existing coding methods struggle to efficiently avoid error-prone sequences while retaining usable ones, leading to low density and high copy numbers. Here we show Siyuan Code, a DNA storage codec that achieves theoretically optimal density. Our method maps binary data to nearly all suitable low-error sequences in a one-to-one manner, using our data structure to catalog and avoid error-prone...

Scientists have mapped the genetics of cat cancer on an unprecedented scale and found surprising similarities with tumors in humans. The findings could help bring precision cancer treatments to cats while also revealing new clues about how human cancers develop and respond to drugs.

A new analysis suggests mammograms may lead to far less breast cancer overdiagnosis than some earlier studies indicated. Researchers reexamined all eight major randomized screening trials and accounted for differences in follow-up time, screening frequency, and screening after trials ended. Their results were consistent with an overdiagnosis rate below 5%, rather than estimates approaching 30% to 50%.

Researchers found that scented cleaners can react with ozone indoors to create billions or trillions of invisible nanoparticles that can penetrate deep into the lungs. The pollution forms within minutes and, in some cases, may produce an inhaled particle dose comparable to or greater than standing near heavy traffic.

Tirzepatide, sold as Mounjaro and Zepbound, activated calorie-burning brown fat in obese mice, revealing a potential metabolic effect beyond appetite suppression. If confirmed in humans, the finding could help explain the drug’s powerful benefits and inspire more comprehensive treatments for obesity and diabetes.

Scientists discovered a surprising energy paradox in the brain during REM sleep, the stage most closely associated with dreaming. Blood supply to the brain begins increasing even before REM starts, but neurons’ immediately available energy, measured as ATP, then drops. The finding suggests that dreaming may require such intense internal processing that neurons consume energy faster than it can be replenished.