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通过增强耳线粒体功能,SIRT1可以预防噪音引起的听力损失

Yuelian Luo¹, Haoyang Wu¹, Xin Min¹

¹Department of Otolaryngology, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou, China.

Cell communication and signaling : CCS

|April 2, 2025

概括

赛尔图因1 (SIRT1) 通过保持耳氧化还原平衡和线粒体功能来保护免受噪声引起的听力损失. 恢复SIRT1水平为预防和治疗听力损伤提供了一个有希望的治疗策略.

科学领域:

耳神经病学耳神经病学
分子生物学分子生物学
遗传学是一个遗传学.

背景情况:

噪音引起的听力损失 (NIHL) 是一种普遍存在的疾病,治疗选择有限.
赛尔图因1 (SIRT1) 是一种依赖NAD+的脱乙酶,在NIHL的发病过程中作用不明.
了解SIRT1的功能对于开发新型治疗干预措施至关重要.

研究的目的:

研究SIRT1在噪音引起的听力损失的发展中的作用.
探索SIRT1在噪音暴露后在尾管中的功能背后的分子机制.
评估SIRT1调制对NIHL的治疗潜力.

主要方法:

利用NIHL的小鼠模型来评估耳SIRT1表达的变化.
产生毛细胞特异性SIRT1敲击小鼠以研究其功能.
在体内使用腺相关病毒 (AAV) 介导的SIRT1过度表达.
在氧化应激下对听觉细胞 (HEI-OC1) 进行了转录组分析和体外研究.

主要成果:

在NIHL小鼠的耳中,SIRT1表达显著下降.
SIRT1缺乏会加剧毛细胞损伤,突触损失和氧化应激,恶化NIHL.
SIRT1过度表达减弱了噪音引起的耳损伤和减轻了听力损失.
缺少SIRT1会影响葡萄糖代谢和抗氧化途径;SIRT1的激活会通过AMPK促进抗氧化作用.

结论:

SIRT1在尾细胞中发挥着关键的保护作用,防止噪音引起的损伤.
在暴露于噪音后,SIRT1对于维持氧化还原平衡和线粒体功能至关重要.
准SIRT1代表了一种有希望的治疗途径,用于管理噪音引起的听力损失.

关键词:

在 AAV AAV AAV 中.线粒体功能障碍线粒体功能障碍噪音引起的听力损失这是一个SIRT1条件淘汰赛.感官毛发细胞是一种感官毛发细胞.

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