肌醇需求酶1对顺铂所致小鼠耳蜗毛细胞凋亡的作用研究

Effect of Inositol-requiring Enzyme 1 on Cisplatin-induced Apoptosis of Cochlear Hair Cells in Mouse

张晓;王爱梅

1:河南护理职业学院解剖学教研室

2:锦州医科大学生理学教研室

摘要
目的 研究肌醇需求酶1(inositol-requiring enzyme 1,IRE1)对顺铂所致小鼠耳蜗毛细胞凋亡的作用。方法 分离生后3~5 d的健康昆明小鼠(500只)耳蜗基底膜并进行体外培养,24 h后随机分为对照组和不同浓度顺铂组(4、8、16和32μg/ml)(每组200条),再培养24 h。应用异硫氰酸荧光素(FITC)染色观察小鼠耳蜗毛细胞的缺失;应用Hoechst 33258和四甲基异硫氰酸罗丹明(TRITC)标记的鬼笔环肽双重荧光染色观察小鼠耳蜗毛细胞的凋亡;并用Western blot检测小鼠耳蜗中p-IRE1α、p-JNK、Bax及caspase-3的蛋白水平。结果 与对照组比较,顺铂组小鼠耳蜗毛细胞缺失、细胞凋亡率以及p-IRE1α、p-JNK、Bax、caspase-3等蛋白水平显著增高(P<0.01),并且p-IRE1α与Bax、caspase-3表达和细胞凋亡率呈正相关(P<0.05)。结论 IRE1可能参与调控顺铂所致小鼠耳蜗毛细胞凋亡。
关键词
肌醇需求酶1;顺铂;耳蜗;凋亡
基金项目(Foundation):
辽宁省“兴辽英才计划”项目资助(XLYC2002023)
作者
张晓;王爱梅
参考文献

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张晓王爱梅