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Protective role of edaravone against neomycin‐induced ototoxicity in zebrafish
Author(s) -
Choi June,
Chang Jiwon,
Jun Hyung Jin,
Im Gi Jung,
Chae Sung Won,
Lee Seung Hoon,
Kwon SoonYoung,
Jung Hak Hyun,
Chung AhYoung,
Park HaeChul
Publication year - 2014
Publication title -
journal of applied toxicology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.784
H-Index - 87
eISSN - 1099-1263
pISSN - 0260-437X
DOI - 10.1002/jat.2964
Subject(s) - neomycin , ototoxicity , edaravone , hair cell , zebrafish , apoptosis , aminoglycoside , tunel assay , pharmacology , toxicity , chemistry , andrology , biology , microbiology and biotechnology , inner ear , anatomy , biochemistry , medicine , chemotherapy , antibiotics , cisplatin , genetics , organic chemistry , gene
Aminoglycosides such as neomycin are one of the most commonly prescribed types of antibiotics worldwide. However, these drugs appear to generate free radicals within the inner ear, which can result in permanent hearing loss. We evaluated the effects of edaravone, a neuroprotective agent, on neomycin‐induced ototoxicity in transgenic zebrafish. The 5‐day post fertilization (dpf) zebrafish larvae were exposed to 125 μM neomycin and various concentrations of edaravone for 1 h. Hair cell survival was calculated as average numbers of the hair cells in the control group, which was not exposed to neomycin. Ultrastructural changes were evaluated using a scanning electron microscope (SEM) and transmission electron microscope (TEM). Edaravone protected against neomycin‐induced hair cell loss in the neuromasts (1000 μM: 11.6 ± 1.1 cells, neomycin only: 5.5 ± 0.5 cells; n = 10, P < 0.05) and decreased the TUNEL reaction for detecting apoptosis. In ultrastructural analysis, structures of mitochondria and hair cells within neuromasts were preserved in zebrafish exposed to 125 μM neomycin and 1000 μM edaravone for 1 h. Edaravone protected against neomycin‐induced hair cell loss by preventing apoptosis. Copyright © 2013 John Wiley & Sons, Ltd.