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Updated: Aug 9, 2026

miRNA Expression Analyses in Prostate Cancer Clinical Tissues
11:29

miRNA Expression Analyses in Prostate Cancer Clinical Tissues

Published on: September 8, 2015

Ras signaling in prostate cancer progression

Michael J Weber1, Daniel Gioeli

  • 1Department of Microbiology and Cancer Center, University of Virginia Health System, Charlottesville, Virginia 22908, USA. mjw@virginia.edu

Journal of Cellular Biochemistry
|December 23, 2003
PubMed

Insights

Prostate cancer often becomes androgen-independent (AI) but still requires the androgen receptor (AR). Growth factors and Ras signaling may drive AI prostate cancer by making the AR hypersensitive to low androgen levels.

Area of Science:

  • Oncology
  • Molecular Biology
  • Biochemistry

Background:

  • Prostate cancer initially depends on androgens but often recurs as androgen-independent (AI) disease.
  • AI prostate cancer is typically fatal and still requires the androgen receptor (AR) for growth.
  • Understanding how the AR functions in AI prostate cancer is crucial for developing effective treatments.

Purpose of the Study:

  • To investigate the mechanisms by which the androgen receptor (AR) remains active in androgen-independent (AI) prostate cancer.
  • To explore the role of growth factors, receptors, and Ras signaling in prostate cancer progression to AI disease.
  • To examine the potential involvement of post-translational modifications in modulating AR activity.

Main Methods:

  • The study proposes a mechanistic hypothesis based on existing evidence.
  • It focuses on the interplay between growth factor signaling pathways (Ras family) and the androgen receptor (AR).
  • It suggests investigating post-translational modifications of transcriptional cofactors.

Main Results:

  • The article posits that growth factors and Ras signaling pathways drive prostate cancer progression towards androgen hypersensitivity.
  • It suggests that post-translational modifications, such as phosphorylations, of transcriptional cofactors may enable AR function at low androgen concentrations.
  • This leads to a state where the AR is active even without sufficient physiological levels of androgens.

Conclusions:

  • Growth factor signaling and Ras pathways are implicated in the progression of prostate cancer to an androgen-independent state.
  • Post-translational modifications of cofactors are proposed as a key mechanism for maintaining AR activity in AI prostate cancer.
  • Further research into these pathways could reveal novel therapeutic targets for hormone-refractory prostate cancer.

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