U0126 pretreatment inhibits cisplatin-induced apoptosis and autophagy in HEI-OC1 cells and cochlear hair cells.

U0126 pretreatment inhibits cisplatin-induced apoptosis and autophagy in HEI-OC1 cells and cochlear hair cells. Toxicol Appl Pharmacol. 2021 Feb 09;:115447 Authors: Wang D, Shi S, Ren T, Zhang Y, Guo P, Wang J, Wang W Abstract Deafness is the most common sensory disorder in the world. Ototoxic drugs are common inducing factors of sensorineural hearing loss, and cochlear hair cell (HC) damage is the main concern of the present studies. Cisplatin is a widely used, highly effective antitumor drug, but some patients have experienced irreversible hearing loss as a result of its application. This hearing loss is closely related to HC apoptosis and autophagy. U0126 is a specific inhibitor of the extracellular signal-regulated protein kinases 1 and 2 (ERK1/2) signaling pathway and has neuroprotective effects. For example, the neuroprotective effect of U0126 on ischemic stroke has been widely recognized. In neural cells, U0126 can prevent death due to excess glutamate, dopamine, or zinc ions. However, no studies of U0126 and ototoxic drug-induced injury have been reported to date. In the present study, we found that U0126 pretreatment significantly reduced the apoptosis and autophagy of HCs in auditory House Ear Institute-Organ of Corti 1 (HEI-OC1) cells and cochlear HCs. In addition, U0126 reduced the cisplatin-induced production of reactive oxygen species as well as the cisplatin-induced decrease in the mitochondrial membrane potential. The...
Source: Toxicology and Applied Pharmacology - Category: Toxicology Authors: Tags: Toxicol Appl Pharmacol Source Type: research