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Cell Death and Differentiation

Cell Death and Differentiation

IF: 15.4
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p53-dependent elimination of aneuploid mitotic offspring by entosis

Published:27 October 2020 DOI: 10.1038/s41418-020-00645-3 PMID: 33110215
Jianqing Liang, Zubiao Niu, Bo Zhang, Xiaochen Yu, You Zheng, Chenxi Wang, He Ren, Manna Wang, Banzhan Ruan, Hongquan Qin, Xin Zhang, Songzhi Gu, Xiaoyong Sai, Yanhong Tai, Lihua Gao, Li Ma, Zhaolie Chen, Hongyan Huang, Xiaoning Wang, Qiang Sun

Abstract

Entosis was proposed to promote aneuploidy and genome instability by cell-in-cell mediated engulfment in tumor cells. We reported here, in epithelial cells, that entosis coupled with mitotic arrest functions to counteract genome instability by targeting aneuploid mitotic progenies for engulfment and elimination. We found that the formation of cell-in-cell structures associated with prolonged mitosis, which was sufficient to induce entosis. This process was controlled by the tumor suppressor p53 (wild-type) that upregulates Rnd3 expression in response to DNA damages associated with prolonged metaphase. Rnd3-compartmentalized RhoA activities accumulated during prolonged metaphase to drive cell-in-cell formation. Remarkably, this prolonged mitosis-induced entosis selectively targets non-diploid progenies for internalization, blockade of which increased aneuploidy. Thus, our work uncovered a heretofore unrecognized mechanism of mitotic surveillance for entosis, which eliminates newly born abnormal daughter cells in a p53-dependent way, implicating in the maintenance of genome integrity.

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