Requirement of histone deacetylase1 (HDAC1) in signal transducer and activator of transcription 3 (STAT3) nucleocytoplasmic distribution

Sutapa Ray, Chang Lee, Tieying Hou, Istvan Boldogh, Allan R. Brasier

Research output: Contribution to journalArticle

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Abstract

Signal Transducer and Activator of Transcription 3 (STAT3) is a transcription factor that plays a crucial role in interleukin-6 (IL-6) signaling, mediating the acute-phase induction of the human Angiotensinogen (hAGT) gene in hepatocytes. We showed earlier that IL-6 induces acetylation of the STAT3 NH2-terminus by the recruitment of the p300 coactivator. We had also observed a physical interaction of STAT3 and Histone Deacetylase1 (HDAC1) in an IL-6-dependent manner that leads to transcriptional repression. In this study, we sought to elucidate the mechanism by which HDAC1 controls STAT3 transcriptional activity. Here, we mapped the interacting domains of both STAT3 and HDAC1 and found that the COOH-terminal domain of HDAC1 is necessary for IL-6-induced STAT3 transcriptional repression, whereas the NH2-terminal acetylation domain of STAT3 is required for HDAC1 binding. Interestingly, over expression of HDAC1 in HepG2 cells leads to significantly reduced amounts of nuclear STAT3 after IL-6 induction, whereas silencing of HDAC1 resulted in accumulation of total and acetylated STAT3 in the nucleus. We have found that HDAC1 knockdown also interferes with the responsiveness of the STAT3-dependent MCP1 target gene expression to IL-6, as confirmed by real-time RT-PCR analysis. Together, our study reveals the novel functional consequences of IL-6-induced STAT3-HDAC1 interaction on nucleocytoplasmic distribution of STAT3.

Original languageEnglish (US)
Pages (from-to)4510-4520
Number of pages11
JournalNucleic Acids Research
Volume36
Issue number13
DOIs
StatePublished - Aug 2008

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STAT3 Transcription Factor
Histones
Interleukin-6
Acetylation
Angiotensinogen
Hep G2 Cells
Real-Time Polymerase Chain Reaction
Hepatocytes
Transcription Factors

ASJC Scopus subject areas

  • Genetics

Cite this

Requirement of histone deacetylase1 (HDAC1) in signal transducer and activator of transcription 3 (STAT3) nucleocytoplasmic distribution. / Ray, Sutapa; Lee, Chang; Hou, Tieying; Boldogh, Istvan; Brasier, Allan R.

In: Nucleic Acids Research, Vol. 36, No. 13, 08.2008, p. 4510-4520.

Research output: Contribution to journalArticle

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