Keywords: LMO4; Lim domain only 4; PNDC; peroxynitrite decomposition catalyst; ABR; auditory brainstem responses; MTT; 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide; Cisplatin; Ototoxicity; Protein nitration; LMO4; Cochlea; Hearing loss;