与POI相关的EIF4ENIF1突变显示出翻译调节能力受损
Yuxi Ding1, Shuya Chen2, Jing Jin3
1The State Key Laboratory for Complex, Severe, and Rare Diseases, SXMU-Tsinghua Collaborative Innovation Center for Frontier Medicine, Department of Basic Medical Sciences, School of Medicine, Tsinghua University, Beijing 100084, China.
Gene
|April 11, 2024
概括
EIF4ENIF1中的遗传变异与早产卵巢缺陷 (POI) 有关. 一种新型变异,R208H,和以前识别的突变,Q842P,显示了改变的翻译调节,可能解释POI病原体. 在变异函数分析中,T&T-seq被证明是有效的.
科学领域:
- 遗传学 遗传学 是一个
- 生殖生物学 生殖生物学
- 分子生物学分子生物学
背景情况:
- 遗传变异与早产卵巢缺陷 (POI) 有关.
- 在体外评估这些变异的功能影响可能具有挑战性.
- 全外体序列测序 (WES) 在零星POI患者的EIF4ENIF1基因中发现了一种新的误解变异 (c.623G>A;p.R208H).
研究的目的:
- 调查EIF4ENIF1 R208H变体和之前报告的POI相关突变体 (Q842P) 对蛋白质特性和翻译调节的功能影响.
- 评估翻译-转录双奥米克测序 (T&T-seq) 对评估变异函数的有用性.
主要方法:
- 在93名零星的POI患者中进行全外体测序 (WES).
- 在293FT细胞中对野生型 (WT) EIF4ENIF1及其突变 (R208H,Q842P) 的体外分析.
- 翻译-转录双奥米克测序 (T&T-seq) 在过度表达EIF4ENIF1 WT和突变后,以分析基因表达和翻译效率 (TE).
主要成果:
- 实验室试验没有显示R208H和Q842P突变体的亚细胞分布或核进口发生变化.
- EIF4ENIF1 WT过度表达显著降低了总体翻译效率 (TE).
- Q842P突变未能抑制全球翻译,显示TE高于WT.
- 突变R208H降低了整体TE,但对高TE基因的抑制作用减少了.
- 与生育相关的基因 (AMH,SERPINE1,THBS1) 与WT相比,在突变群体中显示出翻译上调.
结论:
- 突变EIF4ENIF1可能会通过受损的翻译抑制引起POI.
- T&T-seq是一种敏感的方法,用于评估由转化调节基因变异引起的功能变化.
- 这种方法可以帮助澄清遗传变异的临床意义.
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