Expression of miR-223 in clear cell renal cell carcinoma and its significance / 南方医科大学学报

<p><b>OBJECTIVE</b>To investigate the expression of miR-223 in clear cell renal cell carcinoma (ccRcc) and its clinical implications.</p><p><b>METHODS</b>Quantitative real-time PCR was employed to detect the levels of miR- 223 expression in ccRcc, pair-matched adjacent normal tissues and different renal cancer cell lines. Transwell migration essay and wound healing essay were used to evaluate the invasion and migration of renal cancer 786-O cells transfected with miR-223 mimics. MTT essay was used to measure the cell proliferation, and the cell cycle changes following the transfection were analyzed with flow cytometry.</p><p><b>RESULTS</b>Compared with the normal tissues, the cancer samples showed up-regulated miR-223 expression, which was associated with tumor size. In 786-O cell cultures, transfection with miR-223 mimics significantly enhanced cell migration (P<0.0001) and growth (P=0.006) and induced G1 cell cycle arrest.</p><p><b>CONCLUSION</b>miR-223 promotes renal cancer cell migration and proliferation and may serve as a potential therapeutic target for ccRcc.</p>

Construction of a recombinant lentiviral vector for VHL and VHL shRNA and its effect on proliferation and apoptosis of renal cell carcinoma cells / 南方医科大学学报

<p><b>OBJECTIVE</b>To construct a lentiviral expression vector for human VHL and its shRNA vector, and study the effect of VHL on proliferation and apoptosis of renal cell carcinoma cell lines.</p><p><b>METHODS</b>Lentiviral vectors pZsGreen1-VHL and pLL3.7-shVHL were constructed and transfected into 293T cells with 3 packaging plasmids by Lipofectamine(TM) 2000 reagent. The supernatant was collected to infect A498 and Caki-1 cells, respectively. VHL mRNA and protein levels were detected by RT-PCR and Western blotting, respectively. The effect of VHL on the proliferation, cell cycle and cell apoptosis were analyzed by MTS and flow cytometry.</p><p><b>RESULTS</b>The recombinant lentiviral vectors were successfully constructed. The proliferation of A498 cells with reconstituted wild-type VHL was significantly inhibited, while the proliferation of Caki-1 cells with VHL knockdown was significantly enhanced as compared with the control cells (P<0.05). VHL induced G0/G1-S cell cycle arrest. The apoptosis rate of A498 cells with reconstituted wild-type VHL was significantly increased while that of Caki-1 cells with VHL knockdown was significantly lowered compared with the control cells (P<0.05).</p><p><b>CONCLUSION</b>VHL can inhibit the proliferation and induce apoptosis of renal cell carcinoma cells.</p>