在Tmem135中发生的突变会导致渐进的神经感官听力损失
Mi-Jung Kim1, Shion Simms1, Ghazaleh Behnammanesh2
1Department of Physiology and Aging, University of Florida, Gainesville, FL, United States.
Hearing research
|February 19, 2025
概括
跨膜蛋白135 (TMEM135) 突变导致小鼠逐渐听力损失. TMEM135对于维持耳细胞功能和听觉感官完整性至关重要.
科学领域:
- 遗传学 遗传学 是一个
- 耳鼻喉科 耳鼻喉科 耳鼻喉科
- 细胞生物学 细胞生物学
背景情况:
- 跨膜蛋白135 (TMEM135) 是一种涉及线粒体和过氧体功能的保存蛋白.
- 以前的研究将TMEM135与代谢过程联系起来,但其在听觉系统中的作用尚未被探索.
研究的目的:
- 为了研究TMEM135在哺乳动物听觉系统中的功能.
- 确定Tmem135突变对听力和耳结构的影响.
主要方法:
- 在CBA/CaJ背景上利用了野生型和Tmem135突变 (FUN025) 的小鼠.
- 通过在不同频率和年龄段进行听觉脑干响应 (ABR) 测试来评估听觉功能.
- 检查了耳组织学,包括毛细胞存活率,螺旋质神经元密度和血管完整性.
- 通过BaseScope RNA in situ杂交分析了TMEM135表达模式.
- 使用Volocity和Costes分析研究了TMEM135与毛细胞中的线粒体的同位化.
主要成果:
- 在Tmem135 FUN025突变小鼠中,从3个月开始的感觉神经神经听力损失逐渐发展,到12个月变得更严重.
- 在突变小鼠中观察到显著的外发细胞损失和内发细胞,螺旋质神经元和血管的中度变化.
- 在关键的耳细胞类型中检测到TMEM135表达:内毛细胞,外毛细胞,支细胞和血管.
- 发现TMEM135与头发细胞内的线粒体共局.
结论:
- 在Tmem135中FUN025突变导致年龄依赖的渐进性听力损伤.
- TMEM135对耳细胞,特别是毛细胞的生存和功能起着至关重要的作用.
- TMEM135对于保持整个衰老过程中的听觉感官功能至关重要.
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