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An Orthotopic Murine Model of Human Prostate Cancer Metastasis
06:48

An Orthotopic Murine Model of Human Prostate Cancer Metastasis

Published on: September 19, 2013

Decreased expression of cellular prostatic acid phosphatase increases tumorigenicity of human prostate cancer cells

M F Lin1, M S Lee, X W Zhou

  • 1Department of Biochemistry, College of Medicine, University of Nebraska Medical Center and Omaha Veterans Administration Medical Center, Omaha, Nebraska, USA.

The Journal of Urology
|October 5, 2001
PubMed
Abstract

Insights

Decreased expression of human prostatic acid phosphatase (PAcP) in prostate cancer cells correlates with tumor growth. Restoring PAcP levels inhibits cancer cell proliferation and tumor development, suggesting PAcP

Area of Science:

  • Oncology
  • Molecular Biology
  • Biochemistry

Background:

  • Protein tyrosine phosphatases regulate cell proliferation and are implicated in oncogenesis.
  • The functional roles of phosphatases in human prostate cancer are largely unknown.
  • Human prostatic acid phosphatase (PAcP) is a key phosphatase in prostate epithelium with potential roles in cancer.

Purpose of the Study:

  • To investigate the biological significance of cellular PAcP expression in human prostate cancer cells.
  • To determine the relationship between PAcP levels and prostate cancer progression.
  • To explore PAcP's role in regulating cell proliferation and oncogenesis.

Main Methods:

  • Immunohistochemical analysis of PAcP expression in prostate cancer specimens.
  • Biochemical assays including immunoprecipitation and immunoblotting to assess PAcP levels and protein tyrosine phosphorylation.
  • In vitro and in vivo characterization of prostate cancer cell behavior, including soft agar assays and xenograft models.

Main Results:

  • Cellular PAcP levels significantly decrease in prostate cancer cells compared to normal tissue.
  • Lower PAcP levels correlate negatively with the growth rate of human prostate cancer cell lines.
  • Restoration of PAcP expression in cancer cells reduced proliferation, anchorage-independent growth, and c-ErbB-2/neu phosphorylation.
  • Xenograft models showed that higher tumor growth and size were associated with lower cellular PAcP levels.

Conclusions:

  • Cellular PAcP down-regulates prostate cancer cell growth, partly through dephosphorylation of c-ErbB-2/neu.
  • Reduced cellular PAcP expression is implicated in prostate cancer progression.
  • PAcP represents a potential therapeutic target for managing prostate cancer growth.

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