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基础科学和病原发生学

Jolene Wei Ling Lee1, Adeline Su Lyn Ng2, Eng-King Tan1,2

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概括
此摘要是机器生成的。

这项研究使用患者衍生细胞模型CADASIL,揭示NOTCH3突变损害了血脑屏障的功能. 了解这些血管效应是CADASIL病理生理学的关键.

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科学领域:

  • 神经科学是一个神经科学.
  • 遗传学 是一个遗传学.
  • 干细胞生物学 干细胞生物学

背景情况:

  • 大脑自体主导动脉病变与皮下心脏病发作和白脑病变 (CADASIL) 是一种与NOTCH3基因突变相关的遗传性痴呆症.
  • NOTCH3突变 (MT) 变种在亚洲普遍存在,但其致病性需要功能验证.
  • 血脑屏障 (BBB) 功能障碍与CADASIL的突触功能障碍有关.

研究的目的:

  • 使用患者衍生的诱导多能干细胞 (iPSCs) 建模NOTCH3MT的发病因子.
  • 为了研究NOTCH3 MT对BBB细胞类型内血管功能的影响.
  • 为研究CADASIL建立一个3D体外BBB模型.

主要方法:

  • 将患者的PBMC重新编程为iPSC,并通过CRISPR-Cas9对同位素对照进行MT校正.
  • 将iPSCs分化为内皮细胞 (EC),皮细胞 (PC) 和星球细胞 (AC).
  • 进行功能性测试 (血管生成,迁移,TEER) 并创建3D BBB类微组织.

主要成果:

  • 在MT细胞类型 (EC,AC,PC) 中,NOTCH3的表达有所不同.
  • MT ECs和PCs显示出相反的奥克卢丁趋势,表明了补偿机制.
  • MT ECs表现出降低了血管生成,迁移和屏障紧张; 3D微组织形成了可 perfusable 血管.

结论:

  • NOTCH3 MT对多种细胞类型具有多方面的影响,需要异质模型.
  • 在CADASIL中研究血管放松调节对于了解疾病机制至关重要.
  • 开发的3D BBB模型显示了在CADASIL中研究血管功能的前景.