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Cell Research

Cell Research

IF: 25.9
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Elimination of senescent cells by ?-galactosidase-targeted prodrug attenuates inflammation and restores physical function in aged mice.

Published:27 April 2020 DOI: 10.1038/s41422-020-0314-9 PMID: 32341413
Yusheng Cai, Huanhuan Zhou, Yinhua Zhu, Qi Sun, Yin Ji, Anqi Xue, Yuting Wang, Wenhan Chen, Xiaojie Yu, Longteng Wang, Han Chen, Cheng Li, Tuoping Luo, Hongkui Deng

Abstract

Cellular senescence, a persistent state of cell cycle arrest, accumulates in aged organisms, contributes to tissue dysfunction, and drives age-related phenotypes. The clearance of senescent cells is expected to decrease chronic, low-grade inflammation and improve tissue repair capacity, thus attenuating the decline of physical function in aged organisms. However, selective and effective clearance of senescent cells of different cell types has proven challenging. Herein, we developed a prodrug strategy to design a new compound based on the increased activity of lysosomal β-galactosidase (β-gal), a primary characteristic of senescent cells. Our prodrug SSK1 is specifically activated by β-gal and eliminates mouse and human senescent cells independently of senescence inducers and cell types. In aged mice, our compound effectively cleared senescent cells in different tissues, decreased the senescence- and age-associated gene signatures, attenuated low-grade local and systemic inflammation, and restored physical function. Our results demonstrate that lysosomal β-gal can be effectively leveraged to selectively eliminate senescent cells, providing a novel strategy to develop anti-aging interventions.

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