CtBP2 modulates the androgen receptor to promote prostate cancer progression

Ken Ichi Takayama, Takashi Suzuki, Tetsuya Fujimura, Tomohiko Urano, Satoru Takahashi, Yukio Homma, Satoshi Inoue

研究成果: Article査読

35 被引用数 (Scopus)

抄録

The androgen receptor (AR) is the key driver of both early and advanced prostate cancer, making a complete understanding of its regulation important. Here, we report the identification of multiple AR-binding sites in the gene encoding the transcription factor CtBP2 (carboxyl terminal-binding protein), genetic variations of which have been associated with prostate cancer susceptibility. Notably, we found that SNPs in the human CTBP2 gene that were associated with prostate cancer development were correlated with AR-enhancer activity. High CtBP2 expression levels correlated with poor prognosis in patients, whereas CtBP2 silencing reduced tumor growth in a mouse xenograft model of human prostate cancer. Consistent with its function as a transcriptional corepressor, CtBP2 repressed tumor-suppressor genes and AR corepressors in prostate cancer cells, such as NCOR and RIP140, by binding with AR to the promoter enhancers of these genes. Global gene-expression analyses revealed a positive effect on androgen-mediated gene expression, and CtBP2 silencing was found to increase AR interactions with corepressors that limit histone modification. Overall, our results show how CtBP2 contributes to prostate cancer progression by modulating AR and oncogenic signaling.

本文言語English
ページ(範囲)6542-6553
ページ数12
ジャーナルCancer Research
74
22
DOI
出版ステータスPublished - 2014 11 15
外部発表はい

ASJC Scopus subject areas

  • 腫瘍学
  • 癌研究

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