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Detecting the Ligand-binding Domain Dimerization Activity of Estrogen Receptor Alpha Using the Mammalian Two-Hybrid Assay
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HDAC3 regulates stability of estrogen receptor α mRNA

Shohei Oie1, Kazuya Matsuzaki, Wataru Yokoyama

  • 1Graduate School of Life and Environmental Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba 305-8577, Japan.

Biochemical and Biophysical Research Communications
|February 14, 2013
PubMed

Insights

Histone deacetylase 3 (HDAC3) stabilizes estrogen receptor alpha (ERα) mRNA, promoting ERα-positive breast cancer proliferation. Inhibiting HDAC3 may offer a therapeutic strategy for ERα-positive breast cancers.

Area of Science:

  • Molecular biology
  • Oncology
  • Biochemistry

Background:

  • Estrogen receptor alpha (ERα) expression is a known risk factor for breast cancer development.
  • Histone deacetylase (HDAC) inhibitors show potential in down-regulating ERα expression in ERα-positive breast cancer cell lines.
  • The precise molecular mechanisms underlying HDAC inhibitor effects on ERα expression remain unclear.

Purpose of the Study:

  • To elucidate the molecular mechanisms by which HDAC inhibitors affect ERα expression.
  • To investigate the role of HDAC3 in ERα mRNA stability and breast cancer cell proliferation.
  • To explore the potential of targeting HDAC3 for ERα-positive breast cancer therapy.

Main Methods:

  • Utilized breast cancer cell lines (MCF-7) to study ERα mRNA stability.
  • Employed knockdown techniques to deplete HDAC3 expression.
  • Analyzed HDAC3 expression levels in ERα-positive versus ERα-negative tumors using the Oncomine database.

Main Results:

  • HDAC inhibitors were found to decrease the stability of ERα mRNA.
  • Knockdown of HDAC3 led to decreased ERα mRNA stability and suppressed estrogen-dependent proliferation in MCF-7 cells.
  • HDAC3 expression levels were significantly higher in ERα-positive tumors compared to ERα-negative tumors.

Conclusions:

  • HDAC3 is crucial for maintaining ERα mRNA stability.
  • HDAC3 plays a significant role in the estrogen-dependent proliferation of ERα-positive breast cancer cells.
  • Targeting HDAC3 presents a potential therapeutic avenue for ERα-positive breast cancers.

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