SmgGDS is up-regulated in prostate carcinoma and promotes tumour phenotypes in prostate cancer cells

H. Zhi, X. J. Yang, J. Kuhnmuench, T. Berg, R. Thill, H. Yang, W. A. See, C. G. Becker, C. L. Williams, R. Li*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

21 Scopus citations

Abstract

SmgGDS is a guanine nucleotide exchange factor with the unique ability to activate multiple small GTPases, implicating it in cancer development and progression. Here, we investigated the role of SmgGDS in prostate cancer by studying the expression of SmgGDS in benign and malignant prostatic tissues. We also probed SmgGDS function in three prostate carcinoma cell lines using small interfering RNA (siRNA). Immunohistochemical analysis revealed that SmgGDS levels were elevated in prostatic intraepithelial neoplasia (PIN), prostate carcinoma, and metastatic prostate carcinoma. In addition, expression of SmgGDS positively correlated with that of cyclooxygenase-2 (COX-2), a protein believed to promote the development of prostate carcinoma. Reduction of SmgGDS expression in prostate carcinoma cells inhibited proliferation and migration, irrespective of androgen receptor status. These effects were accompanied by a reduction in COX-2 expression and in activity of NF-κB, a known regulator of COX-2. Taken together, these findings suggest that SmgGDS promotes the development and progression of prostate cancer, possibly associated with NF-κB-dependent up-regulation of COX-2.

Original languageEnglish (US)
Pages (from-to)389-397
Number of pages9
JournalJournal of Pathology
Volume217
Issue number3
DOIs
StatePublished - Feb 2009

Keywords

  • COX-2
  • Cancer
  • Prostate
  • SmgGDS
  • Tumourigenesis

ASJC Scopus subject areas

  • Pathology and Forensic Medicine

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