Regulation of prostate cancer progression by galectin-3

Yi Wang, Pratima Nangia-Makker, Larry Tait, Vitaly Balan, Victor Hogan, Kenneth J. Pienta, Avraham Raz

Research output: Contribution to journalArticlepeer-review

92 Scopus citations


Galectin-3, a β-galactoside-binding protein, has been implicated in a variety of biological functions including cell proliferation, apoptosis, angiogenesis, tumor progression, and metastasis. The present study was undertaken to understand the role of galectin-3 in the progression of prostate cancer. Immunohistochemical analysis ofgalectin-3 expression revealed that galectin-3 was cleaved during the progression of prostate cancer. Galectin-3 knockdown by small interfering RNA (siRNA) was associated with reduced cell migration, invasion, cell proliferation, anchorage-independent colony formation, and tumor growth in the prostates of nude mice. Galectin-3 knockdown in human prostate cancer PC3 cells led to cell-cycle arrest at G1 phase, up-regulation of nuclear p21, and hypo- hosphorylation of the retinoblastoma tumor suppressor protein (pRb), with no effect on cyclin D1, cyclin E, cyclin-dependent kinases (CDK2 and CDK4), and p27 protein expression levels. The data obtained here implicate galectin-3 in prostate cancer progression and suggest that galectin-3 may serve as both a diagnostic marker and therapeutic target for future disease treatments.

Original languageEnglish (US)
Pages (from-to)1515-1523
Number of pages9
JournalAmerican Journal of Pathology
Issue number4
StatePublished - Apr 2009
Externally publishedYes

ASJC Scopus subject areas

  • Pathology and Forensic Medicine


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