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氨基糖化物毒性的多种机制是通过作用的亚细胞局部化来区分的

Patricia Wu^1,2, Francisco Barros-Becker^1,3, Roberto Ogelman^1,2

¹Virginia Merrill Bloedel Hearing Research Center, University of Washington, Seattle, WA, United States.

Frontiers in neurology

|November 29, 2024

概括

氨基甘油酸抗生素,如尼奥米辛和热胺,通过不同的途径导致毛细胞死亡. 尼奥米辛诱导急性毒性,而 جنت米辛导致延迟细胞死亡,揭示了这些耳毒药的复杂细胞反应.

科学领域:

耳毒性和细胞毒理学
机械感官细胞生物学
脊椎动物的感觉系统

背景情况:

脊椎动物的机械感知毛细胞易受环境毒素的影响,导致听力和平衡障碍.
氨基甘油酸抗生素 (例如,neomycin,gentamicin) 和抗发性药物是导致毛发细胞脱落的常见原因.
了解毛细胞死亡的机制对于开发治疗干预措施至关重要.

研究的目的:

为了阐明斑马鱼中氨基糖化物诱导的毛细胞死亡的独特细胞路径.
为了区分急性与延迟毛细胞死亡的时间和分子机制.
为潜在的治疗策略提供信息,以预防耳毒性.

主要方法:

斑马鱼侧线毛细胞暴露于neomycin和gentamicin的作用.
药物暴露后细胞死亡的时间分析.
冲洗实验,以评估持续暴露的要求.
线粒体和溶酶体功能的测定.
对抗氧化剂和内分泌体调节效应的评估.

主要成果:

尼奥米辛在1小时内诱导了急性头发细胞死亡,与线粒体流相关,并通过线粒体TEMPO减轻.
亨塔米辛诱导发毛细胞死亡延迟至24小时,与溶解体积累相关,对内溶解体操纵有反应.
延迟死亡不需要持续的药物暴露,这表明有明显的下游信号通路.

结论:

氨基糖化物中毒性涉及至少两种不同的细胞死亡途径,具有不同的动力学和分子基础.
急性毒性与线粒体功能障碍有关,而延迟的毒性涉及溶酶体路径.
针对早期的细胞事件而不是特定的死亡途径,可能为氨基糖化物诱导的头发细胞损失提供更有效的治疗方法.

关键词:

氨基甘油化是一种氨基甘油化.头发细胞是指毛细胞.lysosome lysosome 是一种溶解体的组成部分.耳毒性耳毒性耳毒性斑马鱼是一种斑马鱼.

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