庆大霉素及其代谢产物对外毛细胞内游离钙浓度的影响

Gentamicin and Its Metabolite Effect [Ca~(2+)]i in Isolated Outer Hair Cells

陈贤明;王锦玲;屈玲

1:第四军医大学西京医院耳鼻咽喉科

2:第四军医大学西京医院耳鼻咽喉科

3:第四军医大学西京医院耳鼻咽喉科 西安 710033现在南京军区福州总医院耳鼻咽喉科

4:福州 350025

摘要
目的 探讨庆大霉素(GM)耳毒性与耳蜗外毛细胞(OHC)内游离钙([Ca2+] i)之间的关系。方法 离体耳蜗OHC经钙荧光指示剂Fluo-3负载后,用激光扫描共聚焦显微镜测定高钾溶液、GM、GM代谢产物等对OHC[Ca2+]i的影响。结果GM使[Ca2+]i短暂下降,并阻滞高钾溶液引起的钙内流;GM代谢产物则使[Ca2 +]i持续升高,对高钾引起的钙内流无明显影响。结论 GM耳毒性与外毛细胞[Ca2+]i持续升高有关。
关键词
庆大霉素;外毛细胞;钙;共聚焦显微镜
基金项目(Foundation):
作者
陈贤明;王锦玲;屈玲
参考文献

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