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INTRODUCTION: White matter hyperintensity (WMH) is a hallmark imaging biomarker of cerebral small vessel disease and are strongly associated with vascular cognitive impairment in the elderly. Morphological changes in large extracranial brain-feeding arteries, such as the internal carotid (ICA) and vertebral arteries (VA), may alter intracranial hemodynamics and contribute to WMH development. This study examined the relationship between arterial tortuosity and WMHs using magnetic resonance...

U.S.-Chinese tensions have left nearly complete observatory in limbo, jeopardizing research into pulsars and other celestial objects

Latest version of Biosecure Act could raise costs for academic biology labs in an effort to prevent theft of Americans’ health data

Aging is characterized by a coordinated functional decline across multiple organs. While cell-autonomous mechanisms contribute to local aging phenotypes, the systemic synchronicity of aging suggests a major role for cell non-autonomous drivers. Emerging evidence implicates the hypothalamus-a central regulator of neuroendocrine and homeostatic functions-as a potential source of circulating pro-geronic signals. A hallmark of brain aging is the accumulation of senescent cells, particularly in...

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Sleep alterations have long been associated with Alzheimer's disease (AD), but whether it is an early symptom or only develops later in the pathological progression remains unknown. To study this, 5xFAD heterozygous (Het) mice, a transgenic model of amyloid overexpression, and wild-type (WT) littermates at 1, 2, 3, 4 and 6 months of age were assessed within instrumented home cages to noninvasively score 3-state sleep using respirations and gross body movements during the dark cycle. Progressive...

BackgroundPsychological disorders and cognitive impairment frequently co-occur in older adults, posing challenges to healthy aging. This study aimed to examine the association between late-life psychological disorders and the risk of developing cognitive impairment.MethodsProspective study analyzed data from 28,706 older adults enrolled in the Taipei City Older Adults Health Examination (2012-2016), among whom 10.3% developed cognitive impairment during follow-up. Psychological disorders were...

Population aging is accelerating, yet the multi-organ aging process and the geroprotective effects of dietary protein restriction (PR) remain poorly understood. Here, we conducted comprehensive proteomic analyses on 41 mouse tissues during male mouse aging and PR. Our findings identified tissue-specific aging hallmarks, including widespread changes in immunoglobulins and serine protease inhibitors across multiple tissues. PR mitigated age-related tissue-specific protein expression, epigenomic...

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Cross-education (CE), the phenomenon whereby unilateral strength training induces neuromuscular adaptations in the contralateral limb, is underpinned by distributed cortical and subcortical plasticity. This study evaluated acute neural responses to a single bout of metronome-paced unilateral strength training in younger (n = 17; 27 ± 6 years) and older adults (n = 18; 67 ± 5 years). Neurophysiological assessments included corticospinal excitability and inhibition via transcranial magnetic...

Ending Palmer lease is one of many belt-tightening moves amid budget uncertainty