TRIM71的重新激活增强了耳支细胞的线粒细胞和毛细胞形成潜力
Xiao-Jun Li1, Charles Morgan1, Prathamesh T Nadar-Ponniah1
1The Solomon H. Snyder Department of Neuroscience, Johns Hopkins University School of Medicine, Baltimore, MD, USA.
EMBO reports
|July 26, 2023
概括
在成熟的耳支细胞中重新激活TRIM71,恢复了它们再生毛细胞的能力,为治疗聋症提供了新的希望. 这种再生涉及到将其分化为类似祖细胞的细胞.
科学领域:
- 耳鼻神经科学 耳鼻神经科学
- 发展生物学 发展生物学
- 再生医学是一种再生医学.
背景情况:
- 耳毛细胞损失是人类聋的主要原因.
- 耳中的支持细胞可以再生毛细胞,但随着成熟,这种能力会减少.
- 以前的研究表明,LIN28B的重新激活可以恢复成熟的支持细胞中的毛细胞再生潜力.
研究的目的:
- 确定增强成熟耳支细胞再生潜力的新型因素.
- 为了研究TRIM71的作用,一个LIN28B的目标,在支持细胞可塑性和毛细胞再生.
- 阐明TRIM71介导再生的基础分子机制.
主要方法:
- 利用基于器官的测试来研究耳支细胞.
- 重新表达的TRIM71在成熟的 (出生后第五天) 鼠标耳支细胞中.
- 进行了转录基因分析,以识别TRIM71和LIN28B调节的基因模块.
主要成果:
- TRIM71的再表达显著增加了成熟的支持细胞的线粒细胞和毛细胞形成潜力.
- TRIM71促进支细胞的脱差化成为类似祖细胞的细胞,这对于再生至关重要.
- TRIM71的RNA结合活性对其再生功能至关重要.
- 确定了与TRIM71和LIN28B介导的支持细胞重编程相关的基因模块.
- TRIM71-LIN28B的目标Hmga2对于支持细胞自我更新和毛细胞形成至关重要.
结论:
- TRIM71是一种强大的增强器,可支持耳细胞可塑性和毛细胞再生.
- 通过其RNA结合活性,TRIM71通过促进支持细胞脱差异化来促进再生.
- TRIM71-LIN28B-Hmga2轴代表恢复听觉感官细胞的关键途径,并为听力损失提供治疗点.
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