呼吸障碍的器官模型揭示了由PHOX2B-PARMs引起的后脑神经元的模式缺陷
Kathy Nga-Chu Lui1, Zhixin Li1, Frank Pui-Ling Lai1
1Department of Surgery, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Pokfulam, Hong Kong SAR.
Stem cell reports
|June 23, 2023
概括
PHOX2B-聚氨酸的重复突变破坏了呼吸中心的形成. 人类脑干有机体揭示了这些突变如何损害逆核神经元发育,影响呼吸调节.
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:
- 逆状核 (RTN) 对于调节高二氧化碳水平的呼吸至关重要.
- PHOX2B-多聚氨酸重复突变 (PHOX2B-PARMs) 与呼吸功能障碍有关,但它们对RTN形成的确切影响尚不清楚.
研究的目的:
- 研究PHOX2B-PARM如何影响PHOX2B功能和RTN神经元的发育.
- 使用人类脑干器官模型,模拟与RTN相关的呼吸系统疾病.
主要方法:
- 从多能干细胞生成人类大脑干器官 (HBSO) 和未指导的大脑器官 (HCO).
- 利用单细胞转录组学来分析神经元分化.
- 采用患者衍生和工程诱导的多能干细胞系,具有不同的PHOX2B聚氨酸重复长度.
主要成果:
- 在HBSO中,PHOX2B+7Ala PARM表达改变了后脑神经元分化,并损害了RTN类神经元形成.
- 在HCO中,PHOX2B+7Ala PARM破坏了PHOX2B+神经元的模式,影响了Hedgehog和HOX基因表达.
- 在聚氨酸重复长度和RTN形之间建立了相关性,这表明PHOX2B-PARMs的有毒功能获取机制.
结论:
- PHOX2B-PARMs显著阻碍了RTN呼吸中心的发展.
- 机体模型为研究PHOX2B相关呼吸系统疾病的发病学提供了一个独特的平台.
- 在PHOX2B中聚氨酸重复的长度会影响RTN形的严重程度.
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