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*Compound via MeSH
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Medline Plus Health Information
*Prostate Cancer
Endocrinology Vol. 144, No. 5 1656-1663
Copyright © 2003 by The Endocrine Society

Androgen Stimulates Matrix Metalloproteinase-2 Expression in Human Prostate Cancer

Xinbo Liao, J. Brantley Thrasher, Jill Pelling, Jeffery Holzbeierlein, Qing-Xiang Amy Sang and Benyi Li

Departments of Urology (X.L., J.B.T., J.H., B.L.) and Pathology (J.P.), Kansas Cancer Institute, University of Kansas Medical Center, Kansas City, Kansas 66160; and Department of Chemistry and Biochemistry (Q.-X.A.S.), Florida State University, Tallahassee, Florida 32306

Address all correspondence and requests for reprints to: Benyi Li, M.D./Ph.D., Kansas University Medical Center Urology, 3901 Rainbow Boulevard, Lied 1042, Kansas City, Kansas 66160. E-mail: bli{at}kumc.edu.

Prostate growth and differentiation is androgen dependent, and increased expression of matrix metalloproteinase 2 (MMP-2) has been found in more aggressive prostate cancers. As part of our efforts to elucidate the mechanisms responsible for prostate cancer progression, we evaluated the MMP-2 expression after androgen stimulation in human prostate cancer LNCaP and LAPC-4 cells, which express a functional androgen receptor. Treatment of the cells with a synthetic androgen R1881 resulted in an increase of pro-MMP-2 expression assessed by Western blot and gelatinolytic zymography in both cell lines. R1881-stimulated pro-MMP-2 expression occurred in a dose-dependent manner, which was completely abrogated in the presence of the nonsteroid androgen antagonist bicalutamide. In accordance with the protein expression, MMP-2 promoter activity was also increased by R1881 in a cell-based luciferase reporter assay. However, R1881 treatment did not significantly affect either the pro-MMP-9 expression or its promoter activity. Although we observed an appearance of active form of MMP-2, its activator MT1-MMP was not changed after R1881 treatment. Pretreatment of the cells with inhibitors of RNA transcription, actinomycin D, or protein translation, cycloheximide, significantly suppressed R1881-induced pro-MMP-2 expression in LNCaP cells, indicating that androgen stimulates pro-MMP-2 gene expression. In addition, phosphatidylinositol 3'-kinase inhibitor, LY294002 or wortmannin, strongly inhibited R1881-induced pro-MMP-2 expression. Finally, R1881-enhanced LNCaP cell migration was clearly suppressed by LY294002 or the MMP-2 inhibitor OA-Hy in an in vitro migration assay. In conclusion, our data demonstrated that androgen stimulates pro-MMP-2 expression in LNCaP cells via phosphatidylinositol 3'-kinase-dependent androgen receptor transactivation.




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