通过BMP-SMAD1信号控制神经元激发抑制平衡
Zeynep Okur1, Nadia Schlauri1,2, Vassilis Bitsikas1
1Biozentrum, University of Basel, Basel, Switzerland.
Nature
|April 17, 2024
概括
科学家发现成年小鼠的骨形态蛋白2 (BMP2) 信号有助于保持大脑激发抑制平衡. 干扰帕瓦胺内神经元的这种通路会导致,这表明重新定位的发育通路会稳定成年神经网络.
科学领域:
- 神经科学
- 分子生物学
- 发育生物学
背景情况:
- 哺乳动物新皮质中的神经网络需要激发和抑制的平衡才能正常工作.
- 这种激发抑制状态的不平衡与神经发育障碍和有关.
- 神经元微电路动态调整连接和功能以保持这种平衡.
研究的目的:
- 通过增加神经元活动激活成年小鼠新皮质的信号通路.
- 研究骨形态蛋白2 (BMP2) 在调节皮质激发抑制平衡中的作用.
- 阐明BMP2信号对帕瓦胺表达 (PV) 内神经元的下游影响.
主要方法:
- 研究成年小鼠新皮质中的信号通路.
- 研究了BMP2及其下游转录因子SMAD1的作用.
- 在PV内部神经元中干扰BMP2-SMAD1信号.
- 评估了质受体内置,周神经网络和神经元刺激性的变化.
- 在小鼠中观察到自发性发作,信号受损.
主要成果:
- 增加的神经元活动会提高新皮层中的BMP2水平.
- BMP2通过SMAD1对PV内部神经元起作用,影响谷氨酸突触和周围神经网络.
- 在PV内部神经元中,BMP2-SMAD1信号的干扰导致内化损失,网络发育不良,刺激能力下降.
- 导致皮质刺激-抑制平衡的损失.
结论:
- 发育形态信号传递 (BMP2-SMAD1) 被重新用于稳定成人皮质网络.
- 这种途径对于通过PV内神经元保持激发抑制平衡至关重要.
- 在PV内部神经元中这种通路的功能障碍导致发作,突出显示了它在神经稳定中的作用.
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