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Cellular senescence and neurodegeneration

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Abstract

Advancing age is a major risk factor of Alzheimer’s disease (AD). The worldwide prevalence of AD is approximately 50 million people, and this number is projected to increase substantially. The molecular mechanisms underlying the aging-associated susceptibility to cognitive impairment in AD are largely unknown. As a hallmark of aging, cellular senescence is a significant contributor to aging and age-related diseases including AD. Senescent neurons and glial cells have been detected to accumulate in the brains of AD patients and mouse models. Importantly, selective elimination of senescent cells ameliorates amyloid beta and tau pathologies and improves cognition in AD mouse models, indicating a critical role of cellular senescence in AD pathogenesis. Nonetheless, the mechanisms underlying when and how cellular senescence contributes to AD pathogenesis remain unclear. This review provides an overview of cellular senescence and discusses recent advances in the understanding of the impact of cellular senescence on AD pathogenesis, with brief discussions of the possible role of cellular senescence in other neurodegenerative diseases including Down syndrome, Parkinson’s disease, multiple sclerosis, and amyotrophic lateral sclerosis.

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Funding

This work is supported by NIH grants RF1AG056302 and RF1AG068281 to H.Z.

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Correspondence to Hong Zhang.

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Holloway, K., Neherin, K., Dam, K.U. et al. Cellular senescence and neurodegeneration. Hum. Genet. 142, 1247–1262 (2023). https://doi.org/10.1007/s00439-023-02565-x

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  • DOI: https://doi.org/10.1007/s00439-023-02565-x

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