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(2) Xu B, Yang M, Li Z, Zhang Y, Jiang Z, Guan S, Jiang D

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SIRT1 targets over 100 different proteins involved in metabolism, stress responses, and longevity pathways, including the tumor suppressor p53, the transcriptional coactivator PGC-1α, and the DNA repair protein Ku70. Through deacetylation of PGC-1α, SIRT1 promotes mitochondrial biogenesis and oxidative metabolism, while deacetylation of p53 reduces apoptotic responses to mild stress, promoting cellular survival and longevity