多模式感官神经元的疼痛和的编码机制
Changxiong Guo1, Haowu Jiang1, Cheng-Chiu Huang1
1Washington University Pain Center, Department of Anesthesiology, Washington University School of Medicine in St. Louis, St. Louis, MO 63110, USA.
Cell reports
|October 27, 2023
概括
多模态感觉神经元传递疼痛和的信号. 神经胺乙基 (NMB) 对于是必不可少的,而谷氨酸对疼痛和都至关重要,揭示了不同的信号通路.
科学领域:
- 神经科学是一个神经科学.
- 感官生物学 感官生物学
- 分子生物学分子生物学
背景情况:
- 多模态感觉神经元整合各种刺激.
- 这些神经元对疼痛和的编码背后的机制尚未完全理解.
- MrgprD+神经元是介导机械疼痛和非胰岛素的关键群体.
研究的目的:
- 研究来自MrgprD+多模式神经元的疼痛和信号的独特分子和神经电路机制.
- 确定谷氨酸和神经丁B (NMB) 在疼痛和传播中的作用.
- 为了识别用于处理的专用中央电路.
主要方法:
- 在体内激活MrgprD+神经元的化基激活.
- 评估与疼痛和有关的行为.
- 神经元活动的电生理记录.
- 选择性切除脊髓神经元.
- 分析VGlut2和NMB的信号通路.
主要成果:
- 化学遗传激活MrgprD+神经元诱导了剂量依赖的疼痛和行为.
- 谷氨酸释放 (依赖于VGlut2) 对于疼痛和都是必要的.
- 神经丁B (NMB) 选择性地需要用于的信号传递.
- 谷氨酸与NMB协同作用,激发对NMB敏感的突触后神经元.
- 脊髓神经元切除可以消除,但不能消除疼痛信号.
结论:
- 多模式神经元可以同时处理疼痛和的信号.
- 独特的神经递质 (两者都是谷氨酸,的NMB) 调解疼痛和.
- 一个专门的中央电路处理来自MrgprD+神经元的信号,与疼痛通路分开.
- 这些发现为疼痛和的感觉的编码和处理提供了新的见解.
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