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通道突触介导呼吸道保护性化学反应的神经传递
Shogo Soma1, Norihito Hayatsu2, Kengo Nomura1
1Department of Molecular Cell Physiology, Kyoto Prefectural University of Medicine, Kyoto, Kyoto 602-8566, Japan.
Cell
|April 5, 2025
概括
研究人员发现喉中专门的细胞会触发保护性呼吸道反应, 这些与慢性咳相关的细胞为呼吸道防御和高反应提供了新的治疗点.
科学领域:
- 神经科学
- 细胞生物学
- 生理学
背景情况:
- 喉的神经反射对于保护呼吸道免受吸入和感染至关重要.
- 这些反射的确切机制,特别是在慢性咳等疾病中,尚不完全理解.
- 慢性咳是由于其流行程度和缺乏有效治疗方法而造成的重大未满足的临床需求.
研究的目的:
- 确定喉中化学感应反应的细胞和分子基础.
- 阐明特定细胞通路在呼吸道保护反应中的作用.
- 研究导致呼吸道反应过敏的机制.
主要方法:
- 在小鼠中利用全身搜索通道突触和单细胞转录组.
- 研究了Pou2f3+细胞和CALHM1/3通道在喉化学感应中的功能.
- 使用淘汰模型 (Calhm3和Pou2f3) 和光遗传刺激来评估反射活动.
- 检查了空气过敏原暴露对反射通路的影响.
主要成果:
- 在喉中发现了Pou2f3+化学感应细胞的子类,通过CALHM1/3通道突触与阴道神经元进行通信.
- 这些细胞表达T2Rs (味觉受体),在受到有害化学物质的刺激时,引起像吞和咳一样的排斥反射.
- 在Calhm3和Pou2f3淘汰小鼠中,反射被消除了,并且可以通过光遗传刺激触发.
- 暴露于气体过敏剂增强了CALHM3依赖的驱逐反射,表明过度反应的作用.
结论:
- 鉴定了具有CALHM通道突触的Pou2f3+上皮细胞作为呼吸道保护反射的关键化学感应末端器官.
- 确定这些细胞是呼吸道反射的高响应部位.
- 了解呼吸道防御方案的先进机制, 并突出了慢性咳等疾病的潜在治疗目标.
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