Ecabet sodium alleviates neomycin-induced hair cell damage

Yoon Chan Rah, June Choi, Myung Hoon Yoo, Gunhwee Yum, Saemi Park, Kyoung Ho Oh, Seung Hoon Lee, Soon Young Kwon, Seung Hyun Cho, Suhyun Kim, Hae Chul Park

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)

Abstract

Ecabet sodium (ES) is currently applied to some clinical gastrointestinal disease primarily by the inhibition of the ROS production. In this study, the protective role of ES was evaluated against the neomycin-induced hair cell loss using zebrafish experimental animal model. Zebrafish larvae (5-7 dpf), were treated with each of the following concentrations of ES: 5, 10, 20, 40, and 80 μg/mL for 1 h, followed by 125 μM neomycin for 1 h. The positive control group was established by 125 μM neomycin-only treatment (1 h) and the negative control group with no additional chemicals was also established. Hair cells inside four neuromasts (SO1, SO2, O1, OC1) were assessed using fluorescence microscopy (n=10). Hair cell survival was calculated as the mean number of viable hair cells for each group. Apoptosis and mitochondrial damage were investigated using special staining (TUNEL and DASPEI assay, respectively), and compared among groups. Ultrastructural changes were evaluated using scanning electron microscopy. Pre-treatment group with ES increased the mean number of viable hair cells as a dose-dependent manner achieving almost same number of viable hair cells with 40 μM/ml ES treatment (12.98±2.59 cells) comparing to that of the negative control group (14.15±1.39 cells, p=0.72) and significantly more number of viable hair cells than that of the positive control group (7.45±0.91 cells, p<0.01). The production of reactive oxygen species significantly increased by 183% with 125 μM neomycin treatment than the negative control group and significantly decreased down to 105% with the pre-treatment with 40 μM/ml ES (n=40, p=0.04). A significantly less number of TUNEL-positive cells (reflecting apoptosis, p<0.01) and a significantly increased DASPEI reactivity (reflecting viable mitochondria, p<0.01) were observed in 40 μM/ml ES pre-treatment group. Our data suggest that ES could protect against neomycin-induced hair cell loss possibly by reducing apoptosis, mitochondrial damages, and the ROS generation.

Original languageEnglish
Pages (from-to)1176-1183
Number of pages8
JournalFree Radical Biology and Medicine
Volume89
DOIs
Publication statusPublished - 2015 Dec

Keywords

  • Ecabet sodium
  • Hair cell
  • Neomycin
  • Reactive oxygen species
  • Zebrafish

ASJC Scopus subject areas

  • Biochemistry
  • Physiology (medical)

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