阿米卡星对豚鼠耳蜗毛细胞的损伤作用.doc

阿米卡星对豚鼠耳蜗毛细胞的损伤作用
文章来源毕业论文网

      【摘要】  目的研究阿米卡星(amikacin,AMK)在不同给药时间内对豚鼠耳蜗毛细胞的损伤作用,探讨AMK的耳毒性。方法豚鼠随机分为对照组、AMK 3 d组、AMK 7 d组和AMK 11 d组。采用异硫***酸四***罗丹明标记的鬼笔环肽荧光染色方法,并结合听脑干反应(auditory brainstem response,ABR)测试,观察用药前后耳蜗毛细胞形态及听功能的改变。结果 AMK首先损伤耳蜗底回的外毛细胞,并且随着给药时间延长,损伤逐渐向顶回发展,外毛细胞缺失明显增多,而AMK对内毛细胞的损伤要轻于外毛细胞。听功能改变与形态学变化基本一致。结论 AMK可损伤豚鼠耳蜗毛细胞,导致听功能下降。
      【关键词】  阿米卡星;豚鼠;耳蜗;听脑干反应
        Impairment Effect of Amikacin on Cochlear Hair Cells in Guinea PigLIU Shuangyue, WANG Aimei, XU Tao, MU Hua(Department of Physiology, Liaoning Medical University, Jinzhou China)Abstract:Objective To investigate the impairment effect of amikacin (AMK) on cochlear hair cells in guinea pig at different injection time, and to explore ototoxicity of AMK. Methods Guinea pigs were randomly assigned to four groups: control group, AMK 3-day group, 7-day group and 11-day group. Tetramethylrhodamine isothiocyanate-labeled phalloidine staining and auditory brainstem response (ABR) measurement were used to evaluate the changes of hair cells morphology and auditory function before and after the drug treatment. Results Outer hair cells (OHCs) in the basal turns were first impaired by AMK, and the impairment of OHCs developed to the apical turns with time prolonging, and the loss of OHCs was increased signif