Histone Deacetylase 10 Regulates the Cell Cycle G2/M Phase Transition Via a Novel Let-7-HMGA2-Cyclin A2 Pathway

Overview

Journal Mol Cell Biol

Specialty Cell Biology

Date 2015 Aug 5

PMID 26240284

Citations 38

Authors

Yixuan Li

Lirong Peng

Edward Seto

Affiliations

Soon will be listed here.

Abstract

Histone deacetylase (HDAC) inhibition leads to cell cycle arrest in G1 and G2, suggesting HDACs as therapeutic targets for cancer and diseases linked to abnormal cell growth and proliferation. Many HDACs are transcriptional repressors. Some may alter cell cycle progression by deacetylating histones and repressing transcription of key cell cycle regulatory genes. Here, we report that HDAC10 regulates the cell cycle via modulation of cyclin A2 expression, and cyclin A2 overexpression rescues HDAC10 knockdown-induced G2/M transition arrest. HDAC10 regulates cyclin A2 expression by deacetylating histones near the let-7 promoter, thereby repressing transcription. In HDAC10 knockdown cells, let-7f and microRNA 98 (miR-98) were upregulated and the let-7 family target, HMGA2, was downregulated. HMGA2 loss resulted in enrichment of the transcriptional repressor E4F at the cyclin A2 promoter. These findings support a role for HDACs in cell cycle regulation, reveal a novel mechanism of HDAC10 action, and extend the potential of HDACs as targets in diseases of cell cycle dysregulation.

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