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Sci Rep:综合的应激反应抑制对噪声引起的耳蜗突触反应提供了性别依赖性的保护

2020-11-12 AlexYang MedSci原创

噪声引起的听力损失(NIHL)是一个常见的健康问题,具有明显的社会、心理和认知影响。

噪声引起的听力损失(NIHL)是一个常见的健康问题,具有明显的社会、心理和认知影响。

与耳鸣和言语认知受损有关的中度声学过度刺激会引起耳蜗突触病,其生理特征是阈上听觉脑干反应(ABR)的I波减少和感觉毛细胞和听觉神经元之间的突触数量减少。未折叠蛋白应激(UPR)是一种内质网应激反应途径,与NIHL的发病和治疗以及大脑神经变性和突触损伤有关系。最近,有研究人员使用小分子UPR调节剂Integrated Stress Response InhiBitor(ISRIB)来治疗噪声诱导的小鼠模型耳蜗突触病。研究发现,小鼠在噪声暴露前用ISRIB进行预处理,可以防止噪声诱导的突触损失。雄性(而非雌性)小鼠同时也表现出ISRIB介导的对噪声诱导的阈上ABR 波-I振幅降低的保护。雌性小鼠有更高的基线波-I振幅,但对噪声诱导的波-I减少更敏感。

最后,研究人员指出,UPR与噪声诱导的耳蜗突触病有关,可以作为治疗的靶标。

原始出处:

Stephanie L Rouse , Ian R Matthews , Jiang Li et al. Integrated stress response inhibition provides sex-dependent protection against noise-induced cochlear synaptopathy. Sci Rep. Oct 2020

 

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    2020-11-14 xinmeili
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    2020-11-12 ms3000000449926787

    学习了

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