内部神经元生存雕塑皮质网络的金字塔细胞调节
Fong Kuan Wong1,2, Kinga Bercsenyi1,2, Varun Sreenivasan1,2
1Centre for Developmental Neurobiology, Institute of Psychiatry, Psychology and Neuroscience, King's College London, London, UK.
Nature
|June 1, 2018
概括
在关键的出生后发育窗口中,金字塔细胞活动调节抑制性内神经元的存活. 这种依赖活动的过程确保发育中的大脑皮层中刺激和抑制神经元的正确平衡.
科学领域:
- 神经科学
- 发育生物学
- 细胞生物学
背景情况:
- 哺乳动物的大脑皮层依赖于激发和抑制神经元的平衡网络才能正常运作.
- 在发育过程中建立适当数量的这些神经元群体的确切机制尚未完全理解.
研究的目的:
- 研究金字塔细胞活动在产后发育过程中调节内部神经元存活的作用.
- 阐明参与活动依赖神经元人口控制的分子通路.
主要方法:
- 利用小鼠模型在关键的产后发育窗口中研究神经元的存活率.
- 研究了激发性突触输入对单个内部神经元生存的影响.
- 研究了酸酶和素同类 (PTEN) 信号通路的调节.
主要成果:
- 在产后小鼠皮层中,神经元的存活取决于金字塔细胞的活性.
- 在特定的发育期内对内神经元的激发性突触输入预测了它们的生存或死亡.
- 金字塔细胞负调节PTEN信号,促进内部神经元细胞死亡.
结论:
- 活动依赖的机制在发育皮质电路中动态调节抑制性内神经元的数量.
- 这一过程对于确定大脑皮层中刺激神经元与抑制神经元的正确比例至关重要.
- 研究结果揭示了早期大脑发育过程中活动依赖电路的新机制.
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