持续性疼痛会激活特殊脑细胞|国产午夜精品无码一区二区

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  科技日报讯 (记者刘霞)美国宾夕法尼亚大学费城分校与斯克里普斯研究所的科研团队合作,在最新一期《自然》杂志发表研究成果称,大脑内存在一类长期被忽视的特殊脑细胞,会在持续性疼痛期间被激活。这一发现目前虽然尚在动物研究阶段,但若能在人类身上获得验证,将为治疗全球约1/5人口的慢性疼痛开辟新路径。

  研究团队将目光聚焦于脑桥区域的旁臂核。这个神经核团如同一个精密的中转站,既能接收身体传来的各类感觉信息,又能将这些信息精准传递至大脑其他功能区。在小鼠实验中,研究团队成功定位了散布在旁臂核内的特殊神经元亚群。这些携带神经肽Y受体的神经元如同被设置了“持久模式”,在初始疼痛刺激(如神经损伤)后持续保持活跃状态。

  当团队激活这类Y1R神经元时,小鼠立即表现出典型疼痛反应;反之,当这些神经元的活动被阻断时,小鼠的持续性疼痛明显缓解,但对高温接触等急性危险仍能作出正常反应。

  研究发现,当小鼠处于应激状态时,大脑其他区域会释放神经肽Y至旁臂核,自然实现镇痛效果。这种巧妙的生理机制,为研发新型镇痛药物提供了重要线索。

  团队认为,神经肽Y信号通路或许可作为极具潜力的药物靶点,为长期停滞的疼痛治疗领域带来突破。

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