Gene Silence-Induced Downregulation of Survivin Inhibits Bladder Cancer Cells

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Urinary bladder cancer accounts for approximately 3% of all cancers in humans. Treatment for urinary bladder is not satisfactory. The present study aims to elucidate the effect of gene silencing of survivin on the inhibition of bladder cancer cells. In this study, we constructed survivin shRNA-carrying lentiviral vectors. Bladder cancer cell lines, T24 cells and BJ cells, were transduced with the constructed shRNA of survivin. The frequency of apoptotic bladder cancer cells was assessed by flow cytometry. The results showed that transfection with survivin shRNA significantly inhibited cell proliferation of both T24 and BJ cells. Most T24 and BJ cells accumulated at the G2/M stage; a portion of them was at sub-G1 stage. An increase in the fraction of bladder cancer cells undergoing apoptosis was noted. Among eight apoptosis-associated proteins, the amounts of BAX and BAD were significantly increased in the survivin-deficient bladder cancer cells. The findings suggest that survivin may be a therapeutic target of bladder cancer to selectively inhibit cell proliferation of bladder cancer cells.

Keywords: Apoptosis; Bladder cancer; Cell proliferation; Survivin; shRNA

Document Type: Research Article


Publication date: December 1, 2012

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