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Updated: Jun 6, 2026

miRNA Expression Analyses in Prostate Cancer Clinical Tissues
11:29

miRNA Expression Analyses in Prostate Cancer Clinical Tissues

Published on: September 8, 2015

Regulatory Role of mir-203 in Prostate Cancer Progression and Metastasis

Sharanjot Saini1, Shahana Majid, Soichiro Yamamura

  • 1Department of Urology, Veterans Affairs Medical Center and University of California, San Francisco, California 94121, USA.

Clinical Cancer Research : an Official Journal of the American Association for Cancer Research
|December 17, 2010
PubMed
Abstract

Insights

MicroRNA-203 (miR-203) acts as an antimetastatic factor in prostate cancer (PCa) bone metastasis. Restoring miR-203 suppresses PCa cell invasion and motility, offering a potential therapeutic target.

Area of Science:

  • Oncology
  • Molecular Biology
  • Genetics

Background:

  • Advanced metastatic prostate cancer (PCa) has limited therapeutic options.
  • Bone metastasis is common in PCa, but its molecular drivers are poorly understood.
  • Identifying regulatory genes is crucial for understanding PCa metastasis.

Purpose of the Study:

  • To identify microRNA (miRNA) genes that regulate PCa metastasis.
  • To investigate the role of miR-203 in PCa bone metastasis.

Main Methods:

  • miRNA expression profiling in PCa cell lines.
  • Assessing miR-203 expression in PCa cell lines and clinical specimens using real-time PCR and in situ hybridization.
  • Functional assays (in vitro and in vivo) after reexpressing miR-203 in bone metastatic PCa cells.

Main Results:

  • miR-203 expression is reduced in bone metastatic PCa.
  • Reintroducing miR-203 inhibits epithelial-mesenchymal transition, invasion, and motility of PCa cells.
  • Ectopic miR-203 suppressed metastasis in a PCa bone metastasis model, regulating genes like ZEB2, Bmi, survivin, and Runx2.

Conclusions:

  • miR-203 functions as an antimetastatic miRNA in PCa.
  • It targets multiple steps in the PCa metastatic cascade by repressing pro-metastatic genes.
  • miR-203 represents a potential therapeutic target for advanced PCa.

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