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Beta-catenin-related anomalies in apoptosis-resistant and hormone-refractory prostate cancer cells

Alexandre de la Taille1, Mark A Rubin, Min-Wei Chen

  • 1Department of Urology, Assistance Publique des Hôpitaux de Paris-CHU Mondor, 94000 Créteil, France. adelataille@hotmail.com

Clinical Cancer Research : an Official Journal of the American Association for Cancer Research
|May 10, 2003
PubMed
Abstract

Insights

Abnormal beta-catenin expression and localization are linked to prostate cancer progression, particularly to a therapy-resistant state. These findings highlight beta-catenin

Area of Science:

  • Molecular Biology
  • Cancer Research
  • Cell Signaling

Background:

  • Beta-catenin is a key protein in the Wnt signaling pathway, regulating cell growth and behavior.
  • Dysregulation of beta-catenin is implicated in various cancers, including prostate cancer.

Purpose of the Study:

  • To investigate beta-catenin expression, localization, and activity in prostate cancer.
  • To evaluate these changes in an in vitro model of acquired apoptosis resistance and in primary prostate tumors.

Main Methods:

  • Derived apoptosis-resistant prostate cancer cell lines from parental LNCaP cells.
  • Analyzed beta-catenin expression and localization using Western blotting and cell fractionation.
  • Assessed transcriptional activity using a beta-catenin-sensitive reporter plasmid.
  • Evaluated beta-catenin in 212 primary prostate cancer specimens via immunohistochemistry.

Main Results:

  • Apoptosis-resistant cells showed a shift of beta-catenin from membrane to cytoplasmic/nuclear fractions.
  • Transcriptional activity of beta-catenin increased significantly in resistant cells.
  • Nuclear/cytoplasmic beta-catenin correlated with hormone-refractory prostate cancer (HRPC) status and Gleason score.
  • Abnormal beta-catenin in localized prostate cancer was associated with higher Gleason scores and advanced stage.

Conclusions:

  • Anomalies in beta-catenin expression and localization occur in prostate cancer.
  • These anomalies are associated with disease progression, especially the development of therapeutic resistance.

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