中文摘要：

背景 Cisplatin ( DDP )是在治疗肿瘤的很有效、最通常使用的治疗学的代理人之一，它能在肾积累并且导致尖锐肾的 failure.MicroRNA-181a 能由压制 Bcl-2 family.In 的表示导致房间 apoptosis 现在的学习，我们在 DDP.Methods HK-2 房间导致的管状的上皮的房间的 apoptosis 调查了 microRNA-181a 的角色是有教养的，有为 48 个小时的 microRNA-181a 禁止者的 transfected ，并且与 50 mol/L cisplatin f 刺激了

英文摘要：

Background Cisplatin （DDP） is one of most effective and most commonly used therapeutic agent in treating tumors,it can accumulate in the kidney and lead to acute renal failure.MicroRNA-181a can induce cell apoptosis by suppressing the expression of Bcl-2 family.In the present study,we investigated the role of microRNA-181a in the apoptosis of tubular epithelial cell induced by DDP.Methods HK-2 cells were cultured,transfected with microRNA-181a inhibitor for 48 hours,and stimulated with 50 μmol/L cisplatin for 24 hours.MicroRNA-181a expression was analyzed by real time PCR,and cell apoptosis was detected by flow cytometry.Moreover,Bcl-2 and Bcl-2-associated X protein （Bax） expression were measured by Western blotting.Results MicroRNA-181a expression significantly down-regulated in cells transfected with microRNA-181a inhibitor,compared with that in untransfectd cells （21.19±2.01 vs.38.87±1.97,P 〈0.05）.Cell apoptosis induced by DDP significantly decreased in cells transfected with MicroRNA-181a inhibitor.Compared with DDP treated cells alone,Bcl-2 expression strikingly was up-regulated and Bax expression was down-regulated in cells transfected with microRNA-181a inhibitor.Conclusion One pathway of DDP induces apoptosis of tubular epithelial cell by suppressing Bcl-2 expression is achieved by regulating the target gene of MicroRNA-181a.