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对CELF1-RNA相互作用的映射揭示了透视镜发育的转录后控制
bioRxiv : the preprint server for biology
|January 16, 2026
概括
结合RNA的蛋白CELF1对于脊椎动物的透镜发育至关重要. CELF1通过抑制向mRNA来调节基因表达,防止白内障并确保眼睛的正常发育.
科学领域:
- 分子生物学分子生物学
- 发展生物学 发展生物学
- 眼科医生 眼科 眼科
背景情况:
- 转录后基因调节对于脊椎动物的透镜发育至关重要.
- 破坏RNA结合蛋白CELF1基因会导致小鼠早期白内障.
研究的目的:
- 为了映射透视镜中的全转录组CELF1结合部位.
- 研究CELF1在透镜发育过程中调节基因表达中的作用.
- 了解在透镜形态发生过程中CELF1介导抑制的分子机制.
主要方法:
- 个体核酸分辨率交联免疫沉,然后在小鼠透镜中进行测序 (iCLIP-seq).
- 转录基因分析和 luciferase 记者测定.
- 在Xenopus laevis中进行基因操纵.
主要成果:
- CELF1与关键透镜发育和病理转录的3'UTRs结合,包括*Gja8*, *Jag1*, *Maf*, *Pax6*和*Prox1*.
- 通过破坏转录和/或抑制翻译,CELF1结合抑制了目标mRNA.
- 与白内障相关的*Maf*和*Gja8*,在*Celf1*条件淘汰镜头中得到了上调.
- 在Xenopus laevis中, *maf* 的过度表达会导致异常的透镜结构和眼睛形态.
结论:
- 通过限制mRNA水平上关键基因的表达,CELF1控制了透镜形态发生.
- 通过CELF1介导的抑制对于在透镜发育过程中实现适当的基因剂量至关重要.
- 这项研究揭示了脊椎动物眼睛发育中由CELF1控制的转录后调节网络.
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