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Notch signaling pathway plays a critical role in chemotherapeutic drug-induced vestibular injury.

The vestibule of the inner ear is susceptible to certain chemotherapeutic agents in clinical practice. Therefore, it is of great significance to discover molecular pathways and targets that can protect the vestibule from chemotherapeutic drugs. The Notch signaling pathway is closely related to hair cell regeneration in the inner ear. However, the role of Notch signaling in chemotherapeutic drug-induced vestibular injury still remains unclear. The aim of this study was first to evaluate the role of Notch signaling in chemotherapy-induced vestibular injury. Cisplatin-induced vestibular injury of mice was evaluated by the swimming test. Changes of vestibular hair cells and the expression levels of Notch1, Jagged1, and Hes1 in Notch signaling were observed by immunofluorescence. The results showed that Notch signaling was found activated in cisplatin-induced injured vestibular cells, while, DAPT (Notch signaling inhibitor) could reversed this effect. In conclusion, the Notch signaling pathway may play a critical role in chemotherapeutic drug-induced vestibular injury and, therefore, serves as a promising therapeutic target for vestibular injury.