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Age-related decline in physical function is a hallmark of aging and a major driver of morbidity, disability, and loss of independence in older adults, yet the molecular processes linking muscle aging to functional deterioration remain incompletely defined. Emerging evidence implicates ferroptosis, defined as iron-dependent, lipid peroxidation-driven cell death, as a compelling but underexplored contributor to age-related muscle wasting and weakness. Although ferroptosis signatures appear in aged...

Alzheimer's disease (AD) is characterized by the accumulation of amyloid-β42 (Aβ42) neurotoxic peptides that cause oxidative stress and neurodegeneration. The current study examined the neuroprotective properties of salvianolic acid A (SalA), an antioxidant polyphenol, in a Drosophila melanogaster model of AD. Transgenic flies expressing human Aβ42 were assayed for eye morphology, life span, and locomotor function after SalA diet supplementation. RNA-seq and RT-qPCR were used to quantify...

CONCLUSIONS: In this nationally representative cohort, vision difficulty and motor impairments were independently associated with increased dementia risk over up to 11 years. The presence of multiple sensory difficulties and motor impairments substantially increased the risk of dementia, emphasizing the importance of their early detection and management to reduce dementia risk.