NOTCH3 变异位置影响CADASIL中的多能干细胞水平的表型
Ana Bugallo-Casal1,2, Elena Muiño3,4, Susana B Bravo5
1Translational Stroke Laboratory Group (TREAT), Clinical Neurosciences Research Laboratory (LINC), Health Research Institute of Santiago de Compostela (IDIS), 15706, Santiago de Compostela, Spain.
Neuromolecular medicine
|February 27, 2025
概括
NOTCH3变异在带有皮下心脏病发作和白细胞脑膜病变 (CADASIL) 的脑自体主导动脉病变中的位置会影响疾病的严重程度. 在EGFr域1-6中的变异与Notch3蛋白积累增加和干细胞细胞变化相关.
科学领域:
- 神经遗传学 神经遗传学
- 干细胞生物学 干细胞生物学
- 分子医学是分子医学.
背景情况:
- 大脑自体主导性动脉病变与皮下心脏病发作和白脑病变 (CADASIL) 是主要的遗传性中风原因.
- NOTCH3基因变异,特别是表皮生长因子类重复 (EGFr) 域中的囊蛋白改变突变,是CADASIL的基础.
- 虽然EGFr域1-6中的NOTCH3变异与严重疾病有关,而EGFr7-34中的变异与晚期发病有关,但变异位置对疾病机制的直接影响尚不清楚.
研究的目的:
- 调查NOTCH3致病变体的位置是否影响细胞表型和蛋白质配置.
- 从具有不同EGFr域变异的CADASIL患者中生成和分析人类诱导的多能干细胞 (hiPSC).
主要方法:
- 产生了六个hiPSC线:两个来自NOTCH3 EGFr 1-6变异患者,两个来自EGFr 7-34变异患者,两个来自健康对照.
- 在已建立的hiPSC线条内评估Notch3聚合和蛋白质概况.
- 评估细胞重编程效率和与变异位置相关的蛋白质组变化.
主要成果:
- NOTCH3变种没有妨碍hiPSC重编程效率.
- 与EGFr 7-34变体相比,在EGFr 1-6域中含有NOTCH3变体的hiPSC线条显示了Notch3蛋白积累的增加.
- 蛋白质组分析揭示了高基因细胞体重组机制的变化,具有EGFr 1-6变异的hiPSCs.
结论:
- NOTCH3致病变体的位置直接影响hiPSC中的细胞表型.
- 这些发现支持了临床观察,将NOTCH3变异位置与CADASIL疾病严重程度联系起来.
- 这项研究提供了一个细胞模型,用于在CADASIL中探索基因型-表型相关性.
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