Class effects of proton pump inhibitors in preventing oxaliplatin-induced peripheral neurotoxicity.

Oxaliplatin-induced peripheral neuropathy (OIPN) is a dose-limiting toxicity with limited countermeasures. Basic research has revealed that omeprazole, a proton pump inhibitor (PPI), exerts preventive effects against OIPN. In this study, we evaluated whether other PPIs exert similar effects via in vitro and in vivo experiments. Notably, esomeprazole, lansoprazole, and rabeprazole, classified as PPIs, prevented oxaliplatin-induced cultured F11 neuronal cell damage, and repeated PPI administration prevented mechanical allodynia in rats. However, vonoprazan, a potassium ion-competitive acid blocker, did not exert such effects. Overall, our results highlight the class effects of PPIs against OIPN.