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Restoration of cyclin D2 has an inhibitory potential on the proliferation of LNCaP cells

Biochemical and Biophysical Research Communications, ISSN: 0006-291X, Vol: 387, Issue: 1, Page: 196-201
2009
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Article Description

Despite well known oncogenic function of G1–S cell-cycle progression, cyclin D2 ( CCND2 ) is often silenced epigenetically in prostate cancers. Here we show that CCND2 has an inhibitory potential on the proliferation of androgen receptor (AR)-dependent prostate cancer LNCaP cells. Forced expression of CCND2 suppressed the proliferative ability and induced cell death in LNCaP cells in a cdk-independent manner. Knocking down CCND2 restored the proliferation of LNCaP subclones with relatively high CCND2 expression and low proliferative profiles. Immunoprecipitation using deletion mutants of CCND2 indicated that a central domain of CCND2 is required for binding to AR. A deletion mutant lacking the central domain failed to hinder LNCaP cells. Collectively, our results indicated that CCND2 inhibits cell proliferation of AR-dependent prostate cancer through the interaction with AR. Our study suggests that restoration of CCND2 expression potentially prevents the carcinogenesis of prostate cancer, which is mostly AR-dependent in the initial settings.

Bibliographic Details

Kobayashi, Takashi; Nakamura, Eijiro; Shimizu, Yosuke; Terada, Naoki; Maeno, Atsushi; Kobori, Go; Kamba, Tomomi; Kamoto, Toshiyuki; Ogawa, Osamu; Inoue, Takahiro

Elsevier BV

Biochemistry, Genetics and Molecular Biology

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