瞬时受体电位香草酸亚型1在慢性瘙痒和疼痛中的作用:以软调节作为一种治疗策略
TRPV1 in chronic pruritus and pain: Soft modulation as a therapeutic strategy.
作者信息
Fernández-Carvajal Asia, Fernández-Ballester Gregorio, Ferrer-Montiel Antonio
机构信息
Instituto de Investigación, Desarrollo e Innovación en Biotecnología Sanitaria de Elche (IDiBE), Universidad Miguel Hernández, Elche, Spain.
出版信息
Front Mol Neurosci. 2022 Sep 2;15:930964. doi: 10.3389/fnmol.2022.930964. eCollection 2022.
Chronic pain and pruritus are highly disabling pathologies that still lack appropriate therapeutic intervention. At cellular level the transduction and transmission of pain and pruritogenic signals are closely intertwined, negatively modulating each other. The molecular and cellular pathways involved are multifactorial and complex, including peripheral and central components. Peripherally, pain and itch are produced by subpopulations of specialized nociceptors that recognize and transduce algesic and pruritogenic signals. Although still under intense investigation, cumulative evidence is pointing to the thermosensory channel TRPV1 as a hub for a large number of pro-algesic and itchy agents. TRPV1 appears metabolically coupled to most neural receptors that recognize algesic and pruritic molecules. Thus, targeting TRPV1 function appears as a valuable and reasonable therapeutic strategy. In support of this tenet, capsaicin, a desensitizing TRPV1 agonist, has been shown to exhibit clinically relevant analgesic, anti-inflammatory, and anti-pruritic activities. However, potent TRPV1 antagonists have been questioned due to an hyperthermic secondary effect that prevented their clinical development. Thus, softer strategies directed to modulate peripheral TRPV1 function appear warranted to alleviate chronic pain and itch. In this regard, soft, deactivatable TRPV1 antagonists for topical or local application appear as an innovative approach for improving the distressing painful and itchy symptoms of patients suffering chronic pain or pruritus. Here, we review the data on these compounds and propose that this strategy could be used to target other peripheral therapeutic targets.
慢性疼痛和瘙痒是严重致残的病症,仍然缺乏适当的治疗干预措施。在细胞水平上,疼痛和致痒信号的转导与传递紧密相连,相互产生负调节作用。所涉及的分子和细胞途径是多因素且复杂的,包括外周和中枢成分。在外周,疼痛和瘙痒由专门的伤害感受器亚群产生,这些感受器识别并转导伤害性和致痒信号。尽管仍在深入研究中,但越来越多的证据表明,热感觉通道TRPV1是大量促痛和致痒因子的核心。TRPV1在代谢上似乎与大多数识别伤害性和瘙痒性分子的神经受体相关联。因此,靶向TRPV1功能似乎是一种有价值且合理的治疗策略。支持这一原则的是,辣椒素作为一种使TRPV1脱敏的激动剂,已被证明具有临床相关的镇痛、抗炎和止痒活性。然而,强效TRPV1拮抗剂由于存在体温过高的副作用而受到质疑,这阻碍了它们的临床开发。因此,采取更温和的策略来调节外周TRPV1功能似乎有必要,以减轻慢性疼痛和瘙痒。在这方面,用于局部或局部应用的软性、可失活的TRPV1拮抗剂似乎是一种创新方法,可改善慢性疼痛或瘙痒患者令人痛苦的疼痛和瘙痒症状。在此,我们综述了有关这些化合物的数据,并提出该策略可用于靶向其他外周治疗靶点。