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A Bioluminescent and Fluorescent Orthotopic Syngeneic Murine Model of Androgen-dependent and Castration-resistant Prostate Cancer
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[Geinsten inhibits the proliferation of VCaP castration-resistant prostate cancer cells]

Fei Li1, Yan-Feng Zhu1, Jing-Yao Chen1

  • 1Department of Public Health, Chengdu Medical College, Chengdu, Sichuan 610500, China.

Zhonghua Nan Ke Xue = National Journal of Andrology
|December 29, 2017
PubMed
Abstract

Insights

Genistein (GEN) effectively inhibits VCaP castration-resistant prostate cancer cell proliferation. This compound halts cell cycle progression and alters key protein expressions, offering a potential therapeutic strategy.

Area of Science:

  • Oncology
  • Molecular Biology
  • Pharmacology

Background:

  • Prostate cancer remains a significant health concern, with castration-resistant prostate cancer (CRPC) presenting a therapeutic challenge.
  • Genistein (GEN), a soy isoflavone, has demonstrated potential anti-cancer properties.
  • Understanding the mechanisms by which GEN affects CRPC cells is crucial for developing novel treatments.

Purpose of the Study:

  • To investigate the inhibitory effects of genistein (GEN) on the proliferation of VCaP castration-resistant prostate cancer (CRPC) cells.
  • To elucidate the impact of GEN on cell cycle progression and the expression of key proteins involved in cancer cell proliferation.

Main Methods:

  • VCaP CRPC cells were exposed to varying concentrations of GEN (0-200 μmol/L) for 24, 48, and 72 hours.
  • Cell proliferation was assessed using the CCK-8 assay.
  • Cell cycle distribution was analyzed by flow cytometry.
  • Immunocytochemistry and Western blot were employed to evaluate the expression of Ki-67, PSA, Cyclin D1, PCNA, and P53.

Main Results:

  • GEN significantly inhibited VCaP cell proliferation in a dose-dependent manner, with inhibition rates up to 68.21% at 200 μmol/L after 72 hours.
  • GEN treatment led to G2/M phase cell cycle arrest and reduced Ki-67 expression.
  • Down-regulation of PSA, Cyclin D1, and PCNA, along with up-regulation of P53, was observed with increasing GEN concentrations.

Conclusions:

  • Genistein exhibits significant anti-proliferative effects on VCaP CRPC cells.
  • GEN-induced inhibition is mediated through cell cycle arrest at the G2/M phase.
  • Altered expression of key proteins involved in cell cycle regulation and cancer progression supports GEN's therapeutic potential in CRPC.
Keywords:
castration-resistant prostate cancergenisteinproliferation

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