816-脊髓-大脑-脊髓慢性疼痛环路解析 episode artwork

EPISODE · Apr 18, 2026 · 21 MIN

816-脊髓-大脑-脊髓慢性疼痛环路解析

from 聊聊Sci

这项研究揭示了驱动慢性机械性疼痛的一条从脊髓到大脑再回到脊髓的多突触回路。研究人员发现,位于延髓头端腹内侧(RVM)的一群表达μ-阿片受体(OPRM1+)的神经元,在痛觉过敏的启动和维持中起着核心作用。实验证明,该回路起源于脊髓丘脑束,经由丘脑(VPL和Po)传导至初级躯体感觉皮层(SS),再通过外侧上丘(lSuC)反馈至RVM。令人关注的是,干预此回路可以消除神经病理性或炎症性疼痛引发的过敏反应,却不影响健康状态下的正常触觉或急性痛觉感知。这一发现不仅打破了传统的外周疼痛认知,还为针对性治疗慢性疼痛且保留保护性痛觉提供了新的细胞靶点。References: Wang Q, Lee J H, Nachtrab G, et al. Deconstruction of a spino-brain–spinal cord circuit that drives chronic pain[J]. Nature, 2026: 1-10.前往小宇宙评论区与主播互动

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816-脊髓-大脑-脊髓慢性疼痛环路解析

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