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一种细胞透的子毒素能够对TRPA1和疼痛进行特定调节
John V Lin King1, Joshua J Emrick2, Mark J S Kelly3
1Department of Physiology, University of California, San Francisco, San Francisco, CA 94143, USA; Neuroscience Graduate Program, University of California, San Francisco, San Francisco, CA 94143, USA.
Cell
|August 27, 2019
概括
一种新的子毒素WATx从细胞内部激活TRPA1离子通道, 引起无炎症的疼痛. 这揭示了刺激物如何向TRPA1通道的趋同演变.
科学领域:
- 神经科学
- 分子生物学
- 药理学
背景情况:
- TRPA1 (短暂受体潜力安基林1) 是刺激物的一个关键传感器.
- 激活通常涉及电友对细胞内氨酸残留物的共价修饰.
- 这种过程会引发疼痛和神经性炎症.
研究的目的:
- 研究一种新型虫毒素 (WaTx) 对TRPA1的作用机制.
- 确定WATX是否与电友刺激剂向相同的细胞内部位.
- 描述WATX诱导的TRPA1激活的功能后果.
主要方法:
- 用于评估TRPA1修饰的生物化学测试.
- 用于测量通道活动的电生理记录.
- 评估疼痛和神经性炎症反应的体内研究.
主要成果:
- WaTx 穿透细胞膜进入细胞内TRPA1激活部位.
- WaTx诱导具有长时间开口和低Ca2+透性的独特活性状态.
- 虽然WaTx会引起急性疼痛和过敏,但不会引起神经性炎症.
结论:
- WaTx为研究TRPA1通道功能提供了一个独特的工具.
- 融合进化允许化学上不同的刺激物通过相同的异质位调节TRPA1.
- 通过WATX和电友的差异TRPA1激活提供了关于疼痛和炎症途径的见解.
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