"The levels of miR-33a were significantly decreased in renal cell cancer (RCC) tissues and cell lines. Low expression of miR-33a in RCC patients indicated a shorter overall survival. MDM4 was identified as a direct target of miR-33a in RCC and the expression level of MDM4 was significantly increased in RCC cells group than the control group. Study results indicate that miR-33a inhibits RCC cell growth by targeting MDM4."xsd:string