耳转录的多样性及其在听觉功能的作用,暗示由一个 otoferlin 短的异形
Huihui Liu1,2,3, Hongchao Liu1,2,3, Longhao Wang1,2,3
1Department of Otolaryngology-Head and Neck Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200011, China.
Nature communications
|May 29, 2023
概括
这项研究揭示了尾细胞中的新型基因异型,包括对听力至关重要的短奥托费林异型. 这种异型支持正常听力,但影响内毛细胞功能和膜检索.
科学领域:
- 基因组学就是基因组学.
- 听觉神经科学 听觉神经科学
- 分子生物学分子生物学
背景情况:
- 替代基因拼接产生了具有不同功能的多种蛋白质异型.
- 状中的全谱基因异型,特别是内毛细胞 (IHCs) 中的基因异型,在很大程度上是未知的.
- 了解这些异构体对于破译听觉功能和功能障碍至关重要.
研究的目的:
- 为了全面识别和描述哺乳动物耳中的替代基因拼接异型.
- 研究新型奥托费林异型在内毛细胞 (IHC) 突触传递和听觉表型中的功能意义.
- 扩大对听觉背后的分子机制的理解.
主要方法:
- 集成的单细胞短读和长读RNA测序 (scRNA-seq).
- 生物信息分析用于识别和注释新的转录.
- 使用RNA-seq,RT-PCR,桑格测序和基于质谱 (MS) 的蛋白质组学进行实验验验证.
- 在IHC中通过基因操纵对奥托费林异型的功能分析.
主要成果:
- 在尾中发现了236,012个转录,其中126,612个以前没有注释.
- 识别并验证了新的拼接异型,包括一个短的奥托费林异型.
- 证明了短的奥托费林异型维持正常听力值,但损害了持续的IHC外细胞分裂.
- 在IHC中发现了前所未知的奥托费林在内细胞膜检索中的作用.
- 与特定的IHC功能和听觉表型相关联的奥托费林异型.
结论:
- 这项研究显著扩大了尾管已知的转录作品集.
- 新型奥托费林异型在IHC功能,突触传输和膜动力学中发挥着关键作用.
- 异形水平分析提供了对听觉过程和相关障碍的更深入的机制理解.
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