Otol Neurotol:Mitoquinone:在丁胺卡那霉素诱导的耳毒性中保护作用评估

2017-12-19 AlexYang MedSci原创

Mitoquinone(MitoQ)是一种线粒体靶向抗氧化物泛醌的衍生物,能够提高生物利用度,并且在人类中被证明是安全的。研究人员假设MitoQ能够在豚鼠中减弱丁胺卡那霉素诱导的耳毒性,并展开了相关研究。研究人员进行了口服和皮下注射两种测试。丁胺卡那霉素处理的豚鼠(n=12-18只每组)只接受水处理(对照)或者MitoQ 30mg/l(基质为饮用水);或者皮下注射3到5mg/kg或生理盐水(对照)

Mitoquinone(MitoQ)是一种线粒体靶向抗氧化物泛醌的衍生物,能够提高生物利用度,并且在人类中被证明是安全的。研究人员假设MitoQ能够在豚鼠中减弱丁胺卡那霉素诱导的耳毒性,并展开了相关研究。

研究人员进行了口服和皮下注射两种测试。丁胺卡那霉素处理的豚鼠(n=12-18只每组)只接受水处理(对照)或者MitoQ 30mg/l(基质为饮用水);或者皮下注射3到5mg/kg或生理盐水(对照)。研究人员在所有的处理前后进行了听觉脑干响应测试和畸变产物耳声发射,并利用电子扫描显微镜和蛋白免疫印迹技术评估了耳蜗毛细包损伤。

研究发现,仅在24kHz时,口服30mg/l MitoQ的豚鼠在丁胺卡那霉素诱导后的3周和6周具有比对照更好的听力。皮下注射的豚鼠仅在24kHz,丁胺卡那霉素诱导后第2周表现出了比对照更好的听力。畸变产物耳声发射(DPOAE)振幅在丁胺卡那霉素注射后降低,但是在处理之间并没有显著的差异(p>0.05)。扫描电竞结果表明了在不同的处理之间,外听毛细胞损失差异较小。蛋白免疫印迹表明了氧化胁迫在MitoQ处理的豚鼠中具有一定程度的减弱。最后,研究人员指出,口服或者皮下注射MitoQ能够为丁胺卡那霉素诱导的听力损失和耳蜗损伤提供有限的保护,应该积极探索其他能够保护丁胺卡那霉素诱导的耳毒性的策略。

原始出处:

Dirain CO, Ng MRAV, Milne-Davies B et al. Evaluation of Mitoquinone for Protecting Against Amikacin-Induced Ototoxicity in Guinea Pigs. Otol Neurotol. Jan 2018.

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