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Updated: Apr 24, 2026

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

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RSK promotes prostate cancer progression in bone through ING3, CKAP2, and PTK6-mediated cell survival

Guoyu Yu1, Yu-Chen Lee1, Chien-Jui Cheng2

  • 1Department of Translational Molecular Pathology, The University of Texas M. D. Anderson Cancer Center, Houston, Texas.

Molecular Cancer Research : MCR
|September 6, 2014
PubMed
Abstract

Insights

Ribosomal S6 protein kinases (RSK) drive prostate cancer progression in bone. Targeting RSK may offer new therapeutic strategies for bone metastasis.

Area of Science:

  • Oncology
  • Molecular Biology
  • Cancer Metastasis

Background:

  • Prostate cancer frequently metastasizes to bone.
  • The mechanisms enabling prostate cancer cell survival and progression in the bone microenvironment are not fully understood.
  • Identifying key molecules is crucial for developing targeted therapies.

Purpose of the Study:

  • To investigate the role of Ribosomal S6 protein kinases (RSK) in prostate cancer bone metastasis.
  • To determine if RSK is a potential therapeutic target for prostate cancer bone metastasis.

Main Methods:

  • Immunohistochemistry (IHC) analysis of human prostate cancer specimens.
  • In vitro studies using prostate cancer cell lines (C4-2B4 and PC3-mm2) with RSK manipulation.
  • Orthotopic bone injection model in mice to assess tumor progression and bone remodeling.

Main Results:

  • Increased RSK phosphorylation was observed in bone metastasis samples.
  • Expression of active RSK enhanced prostate cancer cell survival and anchorage-independent growth.
  • RSK knockdown reduced tumor progression, bone remodeling, and anchorage-independent growth, mediated by transcriptional regulation of survival factors.

Conclusions:

  • RSK is a significant driver of prostate cancer progression in bone.
  • RSK represents a promising therapeutic target for treating prostate cancer bone metastasis.

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