在TWNK的衰退变异导致综合征和非综合征后突触性听觉神经病变通过mtDNA复制缺陷
Xue Gao1, Ying Ma2,3,4, Wei-Qian Wang1
1Department of Otolaryngology, PLA Rocket Force Characteristic Medical Center, 16# XinWai Da Jie, Beijing, 100088, People's Republic of China.
Human genetics
|September 9, 2025
概括
递归TWNK基因变异导致线粒体DNA枯竭,导致听力神经病变. 这些遗传突变会影响后突触听力通路,导致耳植入物效果不佳.
科学领域:
- 遗传学 遗传学 是一个
- 神经科学是一个神经科学.
- 眼科医生 眼科 眼科
背景情况:
- TWNK基因的衰退变异与线粒体DNA (mtDNA) 枯竭综合征有关.
- 听力损失是主要症状,但临床和病理细节尚不清楚.
- 听力神经病变 (AN) 和佩罗综合征是已知的表现.
研究的目的:
- 研究由双基TWNK变异引起的听力损失的临床和病理生理特征.
- 探索TWNK在听觉通路中的作用及其对耳植入结果的影响.
- 阐明TWNK相关的听力功能障碍背后的分子机制.
主要方法:
- 收集并分析了来自中国三大家族的5例双基TWNK变异病例.
- 进行临床评估,包括听力学评估和遗传分析.
- 在小鼠内耳和听觉皮层进行免疫定位研究,并对TWNK转录进行RT-PCR分析.
主要成果:
- 确定了两例孤立的听觉神经病变和三例佩罗综合征.
- 带有耳植入器的患者表现出不良的语音歧视,表明后突触缺陷.
- 分析了Twinkle蛋白位址和mtDNA结合的变异效应,揭示了不同的致病机制.
- 观察到TWNK转录在内耳和大脑中的差异表达.
结论:
- 双基TWNK变体导致综合征和非综合征性听觉神经病变.
- 分子病变发生涉及后突触听觉部位的mtDNA复制受损.
- 与TWNK相关的听力损失患者是耳植入的不佳候选人;基因疗法可能是未来的治疗选择.
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