Fig. 4

IPA treatment protected against TCP-induced neurodegeneration. (A) Morphological results of SGNs in the basal turn of mouse cochlea after 21 days of gavage in the NC, 40 mg/kg IPA, 50 mg/kg TCP, 20 mg/kg IPA + 50 mg/kg TCP, and 40 mg/kg IPA + 50 mg/kg TCP groups (Corn oil as solvent, n = 3). Bar = 50 μm; (B) Morphological results of NFs in the basal turn of mice cochlea after 21 days of gavage in the NC, 40 mg/kg IPA, 50 mg/kg TCP, 20 mg/kg IPA + 50 mg/kg TCP, and 40 mg/kg IPA + 50 mg/kg TCP groups (Corn oil as solvent, n = 3). Bar = 50 μm and 25 μm.