Remote Ischemic Preconditioning Protects Cisplatin-Induced Acute Kidney Injury through the PTEN/AKT Signaling Pathway.

Although cisplatin (Cis) is an effective chemotherapeutic agent in treatment of various cancers, its adverse effect of nephrotoxicity limits the clinical application. Remote ischemic preconditioning (RIPC) is a strategy to induce resistance in a target organ against the oxidative stress and injury by applying transient, brief episodes of ischemia. However, whether RIPC exerts protective effect on Cis-induced renal injury remains unclear. In this study, we showed that RIPC significantly alleviated the renal functional and histopathological damage of Cis-induced acute kidney injury (AKI) mice. Furthermore, RIPC substantially reversed the downregulation of miR-144 and upregulation of PTEN in renal tissues of Cis-induced AKI mice and alleviated tubular cell apoptosis via activating PTEN/AKT signaling. In mechanism, we demonstrated that miR-144 directly targets the 3'-UTR of PTEN mRNA, and then the elevation of miR-144 in RIPC activates PTEN/AKT signaling by downregulating PTEN expression to achieve its antiapoptosis effect. Collectively, our results indicate that RIPC may be a potential therapeutic strategy in Cis-induced AKI, and provide insights on the underlying molecular mechanisms of cisplatin's nephrotoxicity.