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在体外模型下使用人类诱导的多能干干细胞进行唐氏综合征神经发生

Vishi Sharma¹, Harish Chhawari², Pournima Joshi²

¹Stem Cell and Neurobiology Lab, National Centre for Cell Science, S.P. Pune University Complex.

Journal of visualized experiments : JoVE

|March 24, 2025

概括

唐氏综合征 (DS) 损害了神经发生,原因是神经前代细胞 (NPC) 中的双相细胞周期缺陷,导致智力障碍. 这项研究详细介绍了一项使用患者衍生的干细胞来建模和理解这些神经发育问题的协议.

科学领域:

神经科学是一个神经科学.
发展生物学发展生物学
遗传学是一个遗传学.

背景情况:

唐氏综合症 (DS),由三形21引起,是智力障碍的最常见的遗传原因.
胎儿发育期间神经发生障碍是导致DS认知缺陷的关键因素.
来自DS患者的人类诱导多能干细胞 (hiPSC) 为研究神经发育异常提供了有价值的模型.

研究的目的:

在胎儿阶段描述一个综合性协议来回顾唐氏综合征受损的神经发生.
用同位素hiPSC模型研究DS神经发育异常背后的细胞机制.
提供一个强大的实验系统,用于探索三症21中大脑发育的变化.

主要方法:

产生和维护唐氏综合征 (DS) -hiPSCs (染色体21的三副本) 和同源性欧普洛伊德hiPSCs (染色体21的两副本).
将hiPSC分化为神经系,以模拟神经发生.
分析神经原生细胞 (NPC) 增殖和神经原生阶段的细胞周期动态.
在DS衍生的神经细胞中减少神经元分化的验证.

主要成果:

该协议成功地回顾了DS受损神经发生的过程.
在DS NPC中发现了一种双相细胞周期缺陷:早期减少增殖,随后在神经原生阶段晚期增加增殖.
晚期扩散的增加导致细胞周期退出延迟,并减少了神经元转移后的产生.

结论:

神经前体细胞中的双相细胞周期缺陷是唐氏综合征中神经发生障碍的主要原因.
描述的协议提供了一种可靠的方法来研究DS神经发育缺陷在体外.
这种模型系统有助于研究三症21相关的大脑变化和潜在的治疗点.

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