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Updated: Apr 20, 2026

Generation of Prostate Cancer Cell Models of Resistance to the Anti-mitotic Agent Docetaxel
06:44

Generation of Prostate Cancer Cell Models of Resistance to the Anti-mitotic Agent Docetaxel

Published on: September 8, 2017

14.2K

PIAS1 is a crucial factor for prostate cancer cell survival and a valid target in docetaxel resistant cells

Martin Puhr1, Julia Hoefer1, Hannes Neuwirt2

  • 1Experimental Urology, Department of Urology, Medical University of Innsbruck, Innsbruck, Austria.

Oncotarget
|December 5, 2014
PubMed

Insights

Targeting PIAS1 shows promise for improving prostate cancer (PCa) treatment. Inhibiting PIAS1 reduces docetaxel resistance and tumor growth in both primary and metastatic castration-resistant PCa.

Area of Science:

  • Oncology
  • Molecular Biology
  • Cancer Research

Background:

  • Docetaxel resistance is a significant challenge in treating various cancers, notably castration-resistant prostate cancer (PCa).
  • Identifying novel therapeutic targets is crucial for overcoming treatment resistance and improving patient outcomes.

Purpose of the Study:

  • To investigate the role of PIAS1 (Protein Inhibitor of Activated STAT1) in the development and progression of prostate cancer.
  • To evaluate PIAS1 as a potential therapeutic target for overcoming docetaxel resistance in PCa.

Main Methods:

  • Analysis of PIAS1 expression in primary and metastatic PCa tissues, including post-chemotherapy samples and docetaxel-resistant cell lines.
  • In vitro and in vivo functional studies involving PIAS1 knockdown using chicken chorioallantoic membrane and mouse xenograft models.

Main Results:

  • PIAS1 is overexpressed in local and metastatic PCa, with further elevation in tumors post-docetaxel treatment and in resistant cells.
  • PIAS1 knockdown led to increased tumor suppressor p21 expression and decreased anti-apoptotic Mcl1, resulting in reduced cell proliferation and tumor growth.
  • PIAS1 is essential for the survival of both standard and docetaxel-resistant PCa cells.

Conclusions:

  • PIAS1 plays a critical role in prostate cancer cell survival, irrespective of docetaxel sensitivity.
  • Targeting PIAS1 represents a promising therapeutic strategy for treating primary, metastatic, and chemotherapy-resistant prostate cancer.

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