在人类小脑中绘制心室区域衍生的神经元的发育概况
Anders W Erickson1,2,3, Henry Tan4, Liam D Hendrikse1,2
1The Arthur and Sonia Labatt Brain Tumor Research Centre, The Hospital for Sick Children, Toronto, ON M5G0A4, Canada.
概括
人类大脑小脑GABAergic神经发生,包括普尔金耶细胞 (PCs),显示保存的进展,但独特的特征,如外部SVZ分化. 早期胚胎中断可以显著影响这种动态的发育过程.
科学领域:
- 发育神经科学的发展神经科学.
- 神经生物学 神经生物学 神经生物学
- 人类胚胎学 人类胚胎学
背景情况:
- 小脑腹腔区域 (VZ) 是大脑GABAergic神经元的原始体的主要来源,包括普尔金耶细胞 (PC) 和内部神经元 (IN).
- 了解人类小脑神经发生对于了解大脑发育和潜在疾病至关重要.
研究的目的:
- 提供人类大脑小脑GABAergic神经发生的详细描述.
- 将人类小脑神经发生的保存和独特特征与动物模型进行比较.
- 为了定义普尔金尼细胞发育的转录级联.
主要方法:
- 人类小脑组织的转录学分析.
- 对正在发育的人类小脑进行组织病理学检查.
- 与动物小脑发育的比较分析.
主要成果:
- 人类小脑GABAergic神经发生在连续的进展中得到保护,发生在怀孕后8周之前.
- 普尔金耶细胞 (PC) 的分化发生在外腹下区域 (SVZ),该区域在小鼠中不存在,而人类PC显示出长时间的增殖标记表达.
- 人类PC的成熟过程是漫长的,在妊娠晚期涉及广泛的迁移和树枝状树木化,从神经上皮细胞到成熟的PC有明确的转录级联. 内部神经元的分化也延长了,延伸到出生后的年龄.
结论:
- 与动物相比,人类大脑小脑GABAergic神经发生表现出既保留又独特的特征,特别是在PC分化和成熟时间表中.
- 人类PC和IN发育的长期性质凸显了胚胎环境的关键作用.
- 胚胎环境的早期干扰可能对人类小脑发育产生重大影响.
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