在帕金森症中减少了对运动皮质皮质金字塔管神经元的thalamic激发
Liqiang Chen1,2, Samuel Daniels1, Rachel Dvorak1
1Department of Neurodegenerative Science, Van Andel Institute, Grand Rapids, MI 49503 USA.
Science advances
|August 23, 2023
概括
帕金森病 (PD) 涉及多巴胺神经元损失,影响大脑电路和运动控制. 这项研究揭示了大脑对运动皮层神经元的刺激减少,为PD提供了新的见解.
科学领域:
- 神经科学是一个神经科学.
- 细胞和分子生物学 细胞和分子生物学
- 系统神经科学 系统神经科学
背景情况:
- 帕金森病 (PD) 的特点是中脑多巴胺基 (DA) 神经元的退化.
- 这种退化会破坏基底 - 甲状腺皮质电路,导致由于异常的原发动皮质 (M1) 输出导致的运动缺陷.
- 在帕金森症中,细胞和突触水平上的皮层适应性尚未得到充分理解.
研究的目的:
- 为了研究细胞亚型和输入特定的变化,在帕金森症中对M1金字塔管 (PT) 神经元的thalamic激发.
- 为了确定基底的分子机制改变了thalamocortical传播.
- 探索电路层面的修改,这些修改有助于PD中的运动缺陷.
主要方法:
- 采用多学科方法来研究M1适应.
- 研究的细胞亚型和输入特定减少了对M1 PT神经元的thalamic激发.
- 在帕金森症小鼠模型中,利用化学遗传学调节基底性质输出.
主要成果:
- 多巴胺退化导致thalamic激发的减少,特别针对M1金字塔管神经元.
- 鉴定出N-甲基-d-酸盐 (NMDA) 受体是这种降低 thalamocortical 刺激的关键媒介.
- 在帕金森症小鼠中,通过化学遗传学抑制基底腺输出挽救了受损的甲状腺皮质传播.
结论:
- 在M1中细胞亚型和突触特异性适应有助于帕金森症中皮质输出改变.
- 这些发现突出了M1电路修改在帕金森病病理生理学中的作用.
- 了解这些适应提供了PD治疗干预的潜在目标.
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