毒理性
树脂毒素(Resiniferatoxin)激活了一部分初级传入感觉神经元的香草酸受体,这些神经元参与痛觉传递(生理性疼痛的传递)。RTX导致感觉神经元的质膜上出现一种新型的离子通道,即瞬时受体电位香草酸1通道,使其对阳离子,尤其是钙离子的通透性增加。这引发了一种强烈的刺激效应,随后是脱敏和镇痛作用。
Resiniferatoxin activates the vanilloid receptor in a subpopulation of primary afferent sensory neurons involved in nociception (the transmission of physiological pain). RTX causes a novel ion channel in the plasma membrane of sensory neurons, the transient receptor potential vanilloid 1, to become permeable to cations, most particularly the calcium cation. This evokes a powerful irritant effect followed by desensitization and analgesia. (L1244)
来源:Toxin and Toxin Target Database (T3DB)