HNRNPH1通过毒素外子排除来调节神经保护性冷震蛋白RBM3的表达
Julie Qiaojin Lin1,2, Deepak Khuperkar1,2, Sofia Pavlou1,3
1UK Dementia Research Institute and Department of Clinical Neurosciences, University of Cambridge, Cambridge Biomedical Campus, Cambridge, UK.
The EMBO journal
|May 30, 2023
概括
低温通过通过剪接因子HNRNPH1.1增加RNA结合动机3 (RBM3) 来增强神经保护. 这种机制涉及抑制毒素外子,为神经保护提供新的治疗点.
科学领域:
- 神经科学是一个神经科学.
- 分子生物学分子生物学
- 遗传学 遗传学 是一个
背景情况:
- 在各种模型中,冷震蛋白RNA结合动机3 (RBM3) 显示出显著的神经保护作用.
- 控制RBM3冷诱导表达的确切分子机制尚未完全理解.
- 确定RBM3的调节者对于开发神经保护策略至关重要.
研究的目的:
- 阐明RBM3冷感应背后的分子机制.
- 为了确定RBM3表达的温度依赖调节器.
- 探索神经保护的新型治疗点.
主要方法:
- 在人类iPSC衍生的神经元中全基因组的CRISPR-Cas9淘汰屏幕.
- 在不同温度下分析RBM3mRNA和蛋白质水平.
- 拼接分析以确定监管要素和因素.
- 研究异质核核核糖核蛋白H1 (HNRNPH1) 的功能.
主要成果:
- RBM3表达受到拼接因子的显著调节,特别是HNRNPH1.1.
- 中度低温抑制了RBM3mRNA中特定毒素外子的包含.
- HNRNPH1调解冷依赖的外子跳过热敏相互作用与G丰富的动机.
- 这个过程可以防止RBM3mRNA的无意中介衰变.
结论:
- 发现了一种用于冷诱导RBM3的新型机制,涉及HNRNPH1介导的替代拼接.
- 确定了一个对温度敏感的调节元件,对RBM3表达至关重要.
- 为增强RBM3介导的神经保护提供了新的分子标.
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