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An Orthotopic Murine Model of Human Prostate Cancer Metastasis
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An Orthotopic Murine Model of Human Prostate Cancer Metastasis

Published on: September 18, 2013

NGF/γ-IFN inhibits androgen-independent prostate cancer and reverses androgen receptor function through

Wei Chen1, Guo-Min Wang, Jian-Ming Guo

  • 1Department of Urology, Zhongshan Hospital of Fudan University, Shanghai, People's Republic of China.

Stem Cells and Development
|June 27, 2012
PubMed

Insights

Nerve growth factor (NGF) and gamma-interferon (γ-IFN) inhibit androgen-independent prostate cancer (AIPC) by downregulating fibroblast growth factor receptor 2. This treatment reduces cancer stem cells and tumor growth.

Area of Science:

  • Oncology
  • Molecular Biology
  • Immunology

Background:

  • Androgen-independent prostate cancer (AIPC) presents significant therapeutic challenges.
  • Modulating the cytokine environment offers a potential strategy for AIPC treatment.

Purpose of the Study:

  • To investigate the inhibitory effects of a modified cytokine environment using nerve growth factor (NGF) and gamma-interferon (γ-IFN) on AIPC.
  • To elucidate the underlying mechanisms of NGF/γ-IFN action in AIPC.

Main Methods:

  • Utilized androgen receptor (AR)-negative prostate cancer cell lines and animal models.
  • Employed flow cytometry, immunocytochemistry, western blotting, Tunel assay, colony formation efficiency, gene microarray, and in vivo bioluminescence.
  • Assessed the impact of NGF/γ-IFN on cell proliferation, apoptosis, and tumor growth/metastasis.

Main Results:

  • NGF/γ-IFN inhibited AIPC cell proliferation and induced apoptosis in vitro.
  • NGF/γ-IFN suppressed tumor growth and metastasis in vivo.
  • Treatment led to AR re-expression in AR-negative cells, but dihydrotestosterone addition still inhibited proliferation, suggesting a novel mechanism.
  • NGF/γ-IFN decreased the proportion of cancer stem cells.
  • The primary mechanism involved downregulation of fibroblast growth factor receptor 2 (FGFR2).

Conclusions:

  • NGF/γ-IFN effectively inhibits AIPC progression through mechanisms including cancer stem cell reduction.
  • Downregulation of FGFR2 is a key pathway mediating the anti-cancer effects of NGF/γ-IFN.
  • This cytokine combination represents a promising therapeutic approach for refractory prostate cancer.

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