星球细胞通过GPCR信号介导的F-actin重塑来控制静止NSC的活性
Kun-Yang Lin1, Mahekta R Gujar1, Jiaen Lin1
1Neuroscience and Behavioral Disorders Programme, Duke-NUS Medical School, 8 College Road, Singapore 169857, Singapore.
Science advances
|July 24, 2024
概括
神经干细胞 (NSC) 的重新激活依赖于动因聚合,由天体细胞分泌的信号调节. 这一过程对大脑发育至关重要,涉及Smog-Gαq-Rho1-Dia通路.
科学领域:
- 神经科学是一个神经科学.
- 细胞生物学 细胞生物学
- 发展生物学 发展生物学
背景情况:
- 神经干细胞 (NSC) 状态转换对于大脑发育和恒常状态至关重要.
- 对NSC再激活的失调与神经发育障碍有关.
- 在NSC再激活中,actin细胞骨的作用仍然不清楚.
研究的目的:
- 为了研究在神经干细胞重新激活中的actin细胞骨的功能.
- 阐明在NSC重新激活过程中调节actin动态的分子机制.
- 为了确定信号通路和利基衍生因素参与NSC重新激活.
主要方法:
- 扩展和超分辨率显微镜可视化F-actin结构.
- 分析涉及G蛋白结合受体,G蛋白,GTPase和formins的信号级联.
- 研究星体细胞分泌的调节NSC行为的因素.
主要成果:
- 在静止的NSC突出部位中确定了细丝状actin (F-actin) 结构.
- 证明F-actin聚合促进MRTF的核转位,用于NSC的活性化.
- 确定了一个信号级联 (Smog-Gαq-Rho1-Dia),调节F-actin聚合.
- 星球细胞分泌折叠性胃流,从而激活这个信号轴.
结论:
- F-actin动态对于NSC的活性和大脑发育至关重要.
- 来自天体细胞的Smog-Gαq-Rho1信号轴调节了通过Diaphanous/Formin介导的F-actin聚合.
- 这项研究建立了一个新的天体细胞-NSC通信通道,对大脑平衡至关重要.
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