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Coordination between cell proliferation and apoptosis after DNA damage in Drosophila. | LitMetric

Coordination between cell proliferation and apoptosis after DNA damage in Drosophila.

Cell Death Differ

Centro de Biología Molecular "Severo Ochoa", CSIC-UAM, C/Nicolás Cabrera 1, 28049, Madrid, Spain.

Published: April 2022

AI Article Synopsis

Article Abstract

Exposure to genotoxic stress promotes cell cycle arrest and DNA repair or apoptosis. These "life" or "death" cell fate decisions often rely on the activity of the tumor suppressor gene p53. Therefore, the precise regulation of p53 is essential to maintain tissue homeostasis and to prevent cancer development. However, how cell cycle progression has an impact on p53 cell fate decision-making is mostly unknown. In this work, we demonstrate that Drosophila p53 proapoptotic activity can be impacted by the G2/M kinase Cdk1. We find that cell cycle arrested or endocycle-induced cells are refractory to ionizing radiation-induced apoptosis. We show that p53 binding to the regulatory elements of the proapoptotic genes and its ability to activate their expression is compromised in experimentally arrested cells. Our results indicate that p53 genetically and physically interacts with Cdk1 and that p53 proapoptotic role is regulated by the cell cycle status of the cell. We propose a model in which cell cycle progression and p53 proapoptotic activity are molecularly connected to coordinate the appropriate response after DNA damage.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8989919PMC
http://dx.doi.org/10.1038/s41418-021-00898-6DOI Listing

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