调节CeA-Vme投射在由抑制应力引起的masseter过度活动中的调节
Ya-Juan Zhao1, Ji Chen2, Yang Liu1
1State Key Laboratory of Oral and Maxillofacial Reconstruction and Regneration, Department of General Dentistry and Emergency, National Clinical Research Center for Oral Diseases, Shaanxi International Joint Research Center for Oral Diseases, School of Stomatology, The Fourth Military Medical University, Xi'an, China.
Frontiers in cellular neuroscience
|December 6, 2024
概括
压力诱导的牙紧 (牙紧) 涉及中枢桃体 (CeA) 和中脑三角核 (Vme). 从CeA到Vme的GABAergic通路是大肌过度活动的关键,但不是焦虑.
科学领域:
- 神经科学是一个神经科学.
- 压力和焦虑研究 压力和焦虑研究
- 口腔运动功能 口腔运动功能
背景情况:
- Bruxism (牙紧) 与压力和肌肉疼痛有关,但它的神经基础尚不清楚.
- 中枢桃体 (CeA) 影响应激反应,并向中脑三角核 (Vme) 投射,这对部运动至关重要.
研究的目的:
- 调查CeA-Vme神经投射在压力诱导的肌过度活动和焦虑中的作用.
- 为了阐明连接慢性压力与 Bruxism 的特定神经机制.
主要方法:
- 建立了一个克制压力动物模型来观察与焦虑相关的行为和按摩器肌肉活动.
- 使用免疫光的前进和跨突触追踪来绘制CeA-Vme神经通路.
- 使用化学遗传学和光遗传学来操纵CeA和CeA-Vme预测中的GABAergic神经元活动.
主要成果:
- 慢性压力增加了VME中的焦虑,按摩器肌肉活动,改变了神经元刺激能力.
- 对Vme的CeA投射被确定为主要是GABAergic,准Vme内部神经元.
- 抑制CeAGABAergic神经元降低了焦虑和masseter活动;抑制CeA-VmeGABAergic预测特别降低了masseter过度活动.
结论:
- 从CeA到Vme的GABAergic投射对于压力诱导的肌过度活动至关重要.
- 这些发现突出了一个特定的神经回路,涉及到压力的身体表现,如 Bruxism.
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