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Capsaicin causes inactivation and degradation of the androgen receptor by inducing the restoration of miR-449a in prostate cancer

  • Authors:
    • Long Zheng
    • Jiaqi Chen
    • Zhenkun Ma
    • Wei Liu
    • Fei Yang
    • Zhao Yang
    • Ke Wang
    • Xinyang Wang
    • Dalin He
    • Lei Li

  • View Affiliations

  • Published online on: June 11, 2015     https://doi.org/10.3892/or.2015.4055
  • Pages: 1027-1034
Metrics: Total Views: 0 (Spandidos Publications: | PMC Statistics: )
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Abstract

Capsaicin, a novel antitumor agent extracted from chili peppers, has been proven to induce growth inhibition in various types of cancer including prostate cancer. However, the detailed mechanisms remain largely undiscovered. In the present study, we explored the regulation of the androgen receptor (AR) by capsaicin and further researched the mechanisms of their interaction in AR-positive prostate cancer cells. In the present study, cell viability was assessed by MTT assay. Cell cycle distribution was determined using flow cytometry. Expression levels of cyclin D1, miR-449a, AR and prostate‑specific antigen (PSA) were assessed by quantitative real-time polymerase chain reaction or western blot analysis. To further confirm the relationship among miR-449a, AR and prostate cancer proliferation, miR-449a was overexpressed by a lentivirus in prostate cancer cells. We discovered that capsaicin prevented tumor proliferation and cell cycle progression through inactivation and degradation of AR. We also found that restoration of miR-449a induced by capsaicin treatment resulted in the inhibition of AR signaling. Finally, we demonstrated that increased expression of miR-449a sensitized prostate cancer to capsaicin treatment. Finally, our experimental results indicated that capsaicin negatively modulates the activity of AR at the mRNA and protein levels by restoring miR-449a profiling in prostate cancer. In addition, increased expression of miR-449a may facilitate the sensitivity of prostate cancer to capsaicin treatment. Thus, capsaicin may be developed as a novel anti-AR drug for the therapy of prostate cancer.
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August-2015
Volume 34 Issue 2

Print ISSN: 1021-335X
Online ISSN:1791-2431

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  • Impact Factor: 3.8
  • Ranked Oncology
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  • CiteScore: 8.5
  • CiteScore Rank: Q1: #74/404 Oncology
  • Source Normalized Impact per Paper (SNIP): 0.719
  • SCImago Journal Rank (SJR): 0.864
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Spandidos Publications style
Zheng L, Chen J, Ma Z, Liu W, Yang F, Yang Z, Wang K, Wang X, He D, Li L, Li L, et al: Capsaicin causes inactivation and degradation of the androgen receptor by inducing the restoration of miR-449a in prostate cancer. Oncol Rep 34: 1027-1034, 2015.
APA
Zheng, L., Chen, J., Ma, Z., Liu, W., Yang, F., Yang, Z. ... Li, L. (2015). Capsaicin causes inactivation and degradation of the androgen receptor by inducing the restoration of miR-449a in prostate cancer. Oncology Reports, 34, 1027-1034. https://doi.org/10.3892/or.2015.4055
MLA
Zheng, L., Chen, J., Ma, Z., Liu, W., Yang, F., Yang, Z., Wang, K., Wang, X., He, D., Li, L."Capsaicin causes inactivation and degradation of the androgen receptor by inducing the restoration of miR-449a in prostate cancer". Oncology Reports 34.2 (2015): 1027-1034.
Chicago
Zheng, L., Chen, J., Ma, Z., Liu, W., Yang, F., Yang, Z., Wang, K., Wang, X., He, D., Li, L."Capsaicin causes inactivation and degradation of the androgen receptor by inducing the restoration of miR-449a in prostate cancer". Oncology Reports 34, no. 2 (2015): 1027-1034. https://doi.org/10.3892/or.2015.4055