用somatostatin控制神经元迁移的特定阶段
Elina Yacubova1, Hitoshi Komuro
1Department of Neurosciences, Lerner Research Institute, The Cleveland Clinic Foundation, OH 44195, USA.
Nature
|January 10, 2002
概括
索马托斯塔丁差异调节发育中的神经元迁移. 它在发育早期加速小脑颗粒细胞运动,但后来抑制它,影响和通道.
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
- 细胞生物学 细胞生物学
背景情况:
- 发育中的神经元暂时表达体静止素及其受体,在早期发育中的作用基本上是未知的.
- 大脑小粒细胞在迁移前表达所有五个体静止素受体,使他们成为研究体静止素功能的模型.
研究的目的:
- 研究内源性索马托斯塔丁在控制未成熟小脑颗粒细胞的迁移行为方面的功能.
- 阐明索马托斯塔丁对神经元迁移和细胞内信号传递的特定阶段影响.
主要方法:
- 研究了索马托斯塔丁对小脑颗粒细胞迁移在早期产后小鼠的影响.
- 分析了体静止素受体激活及其对自发的Ca2+波动及其对状Ca2+过渡的影响.
- 研究了K+通道活性在使用通道阻塞的索马托斯塔丁介导作用中的作用.
主要成果:
- 索马托斯塔丁对小脑颗粒细胞迁移表现出相反的,特定阶段的影响.
- 移民率在出生地附近增加,但在最终目的地附近下降.
- 索马托斯塔丁在早期 (增强) 和晚期 (消除) 迁移阶段以不同的方式调节了Ca2+波动.
- 通过阻断K+通道活性,索马托斯塔丁诱导的变化被逆转.
结论:
- 索马托斯塔丁作为一个关键的提示,调节神经元迁移时间.
- 它通过改变细胞内Ca2+和K+通道活性来加速早期迁移并终止晚期迁移.
- 这些发现为指导神经元发育和迁移的分子机制提供了洞察力.
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