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An Orthotopic Murine Model of Human Prostate Cancer Metastasis
06:48

An Orthotopic Murine Model of Human Prostate Cancer Metastasis

Published on: September 18, 2013

Inactivation of AR activates HGF/c-Met system in human prostatic carcinoma cells

Akinobu Maeda1, Koh-ichi Nakashiro, Shingo Hara

  • 1Department of Urology, Organ Function Integrative Medicine, Ehime University Graduate School of Medicine, Shitsukawa, Toon, Ehime 791-0295, Japan.

Biochemical and Biophysical Research Communications
|July 28, 2006
PubMed

Insights

Androgen receptor (AR) and c-Met signaling interact in prostate cancer. Inhibiting both AR and c-Met slows cancer growth and may prevent genomic instability in androgen-independent states.

Area of Science:

  • Oncology
  • Molecular Biology
  • Genetics

Background:

  • Prostate cancer progression to an androgen-independent state is linked to androgen receptor (AR) alterations and c-Met overexpression.
  • Understanding the interplay between AR and c-Met signaling is crucial for developing new therapeutic strategies.

Purpose of the Study:

  • To investigate the interaction between androgen receptor (AR) and c-Met signaling pathways in human prostate cancer cells.
  • To determine the role of c-Met signaling in the progression of androgen-independent prostate cancer.

Main Methods:

  • Utilized androgen withdrawal and AR-specific small interfering RNA (siRNA) to modulate AR signaling.
  • Employed siRNA to knockdown both AR and c-Met expression.
  • Conducted microarray analysis to assess gene expression changes.
  • Measured intracellular reactive oxygen species (ROS) and DNA damage accumulation.

Main Results:

  • Androgen withdrawal or AR knockdown reduced cell growth and induced c-Met expression.
  • Simultaneous knockdown of AR and c-Met significantly inhibited prostate cancer cell growth.
  • c-Met activation led to downregulation of DNA repair genes, including 8-oxoguanine DNA glycosylase.
  • Hepatocyte growth factor (HGF) induced ROS production and DNA damage.

Conclusions:

  • c-Met signaling activation contributes to genomic instability and spontaneous mutations in prostate cancer.
  • c-Met signaling promotes survival and growth in androgen-depleted conditions, driving progression to an androgen-independent state.
  • Targeting the c-Met pathway may offer a therapeutic approach for advanced prostate cancer.

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