MicroRNA let-7c suppresses androgen receptor expression and activity via regulation of Myc expression in prostate cancer cells Article (Faculty180)

cited authors

  • Nadiminty, Nagalakshmi; Tummala, Ramakumar; Lou, Wei; Zhu, Yezi; Zhang, Jin; Chen, Xinbin; deVere White, Ralph W; Kung, Hsing- Jien; Evans, Christopher P; Gao, Allen C


  • Castration-resistant prostate cancer continues to rely on androgen receptor (AR) expression. AR plays a central role in the development of prostate cancer and progression to castration resistance during and after androgen deprivation therapy. Here, we identified miR-let-7c as a key regulator of expression of AR. miR-let-7c suppresses AR expression and activity in human prostate cancer cells by targeting its transcription via c-Myc. Suppression of AR by let-7c leads to decreased cell proliferation of human prostate cancer cells. Down-regulation of Let-7c in prostate cancer specimens is inversely correlated with AR expression, whereas the expression of Lin28 (a repressor of let-7) is correlated positively with AR expression. Our study demonstrates that the miRNA let-7c plays an important role in the regulation of androgen signaling in prostate cancer by down-regulating AR expression. These results suggest that reconstitution of miR-let-7c may aid in targeting enhanced and hypersensitive AR in advanced prostate cancer.

publication date

  • 2012

published in

start page

  • 1527

end page

  • 37


  • 287