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MEIS1 functions as a potential AR negative regulator.

Liang Cui1, Mingyang Li2, Fan Feng3

  • 1Department of Urology, Chinese PLA Medical School/Chinese PLA General Hospital, Beijing 100853, PR China; Department of Urology, Civil Aviation General Hospital/Civil Aviation Medical College of Peking University, Beijing 100123, PR China.

Experimental Cell Research
|August 27, 2014
PubMed
Summary
This summary is machine-generated.

MEIS1 protein acts as a novel androgen receptor (AR) co-repressor, inhibiting prostate cancer cell growth. This study reveals MEIS1

Keywords:
AndrogenAndrogen receptorGene expressionMEIS1Physical protein interactionProstatic carcinomaTranscriptional activity

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Area of Science:

  • Molecular Biology
  • Cancer Research
  • Cell Biology

Background:

  • Androgen receptor (AR) signaling is crucial in prostate cancer progression.
  • AR activity is modulated by co-regulatory proteins.
  • MEIS1 protein levels are reduced in aggressive prostate tumors.

Purpose of the Study:

  • To investigate the interaction between MEIS1 and AR.
  • To determine MEIS1's role in AR transcriptional activity.
  • To explore MEIS1's function in prostate cancer cells.

Main Methods:

  • Overexpression of MEIS1 in prostate cancer cells.
  • Immunoprecipitation and GST pull-down assays for protein interaction.
  • Analysis of AR target gene expression and cellular proliferation.
  • Assessment of MEIS1's effect on AR nuclear translocation and co-repressor recruitment.

Main Results:

  • MEIS1 overexpression inhibited AR transcriptional activity and target gene expression.
  • Protein-protein interaction between MEIS1 and AR was confirmed.
  • MEIS1 modulated AR translocation and its binding to the PSA gene promoter.
  • MEIS1 promoted the recruitment of NCoR and SMRT corepressors.
  • MEIS1 inhibited LNCaP cell proliferation and anchor-independent growth.

Conclusions:

  • MEIS1 functions as a novel co-repressor of the androgen receptor.
  • MEIS1 suppresses prostate cancer cell proliferation.
  • MEIS1 represents a potential therapeutic target for prostate cancer.