USP22 transcriptional activity is negatively regulated by the histone deacetylase inhibitor trichostatin A

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Repressing Gene Transcription by Redirecting Cellular Machinery with Chemical Epigenetic Modifiers
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Repressing Gene Transcription by Redirecting Cellular Machinery with Chemical Epigenetic Modifiers

Published on: September 20, 2018

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Jianjun Xiong1, Xiaoyuan Xu1, Xiaou Zhou1

  • 1Jiangxi Province Key Laboratory of Systems Biomedicine, Jiujiang University, Jiujiang, Jiangxi 332000, P.R. China.

Molecular Medicine Reports
|October 18, 2014
PubMed

Insights

Trichostatin A (TSA) inhibits USP22 gene expression by blocking transcription, a key mechanism in its anticancer activity. Overexpressing USP22 reduces TSA-induced apoptosis, revealing new insights into cancer drug regulation.

Area of Science:

  • Molecular Biology
  • Cancer Research
  • Epigenetics

Background:

  • The ubiquitin-specific protease 22 (USP22) gene is frequently overexpressed in various cancers and linked to tumorigenesis.
  • Mechanisms regulating USP22 expression, particularly in response to therapeutic agents, are not well understood.

Purpose of the Study:

  • To investigate the regulatory effects of trichostatin A (TSA) on USP22 gene expression.
  • To elucidate the molecular mechanisms by which TSA influences USP22 transcription and its role in cancer cell apoptosis.

Main Methods:

  • Utilized histone deacetylase inhibitor TSA to treat cancer cells.
  • Assessed USP22 gene expression levels and transcriptional activity.
  • Investigated the interaction between RNA polymerase II and the USP22 promoter.
  • Examined the impact of USP22 overexpression on TSA-induced apoptosis in HeLa cells.

Main Results:

  • TSA negatively regulates USP22 gene expression.
  • TSA inhibits USP22 transcription by preventing RNA polymerase II binding to the USP22 promoter.
  • Overexpression of USP22 diminishes TSA-mediated apoptosis in HeLa cells.

Conclusions:

  • This study provides the first evidence of USP22 gene regulation by an antitumor drug (TSA).
  • The findings reveal that TSA suppresses USP22 transcription, contributing to its anticancer effects.
  • USP22 plays a role in modulating apoptosis induced by TSA, offering potential therapeutic targets.

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