Shin Jieun, Cho Hawon, Hwang Sun Wook, Jung Jooyoung, Shin Chan Young, Lee Soon-Youl, Kim So Hee, Lee Myung Gull, Choi Young Hae, Kim Jinwoong, Haber Nicole Alessandri, Reichling David B, Khasar Sachia, Levine Jon D, Oh Uhtaek
Sensory Research Center, National Creative Research Initiatives, Seoul National University, San 56-1, Shinlim, Kwanak-Gu, Seoul 151-742, Korea.
Proc Natl Acad Sci U S A. 2002 Jul 23;99(15):10150-5. doi: 10.1073/pnas.152002699. Epub 2002 Jul 3.
The capsaicin-sensitive vanilloid receptor (VR1) was recently shown to play an important role in inflammatory pain (hyperalgesia), but the underlying mechanism is unknown. We hypothesized that pain-producing inflammatory mediators activate capsaicin receptors by inducing the production of fatty acid agonists of VR1. This study demonstrates that bradykinin, acting at B2 bradykinin receptors, excites sensory nerve endings by activating capsaicin receptors via production of 12-lipoxygenase metabolites of arachidonic acid. This finding identifies a mechanism that might be targeted in the development of new therapeutic strategies for the treatment of inflammatory pain.
辣椒素敏感的香草酸受体(VR1)最近被证明在炎性疼痛(痛觉过敏)中起重要作用,但其潜在机制尚不清楚。我们推测,产生疼痛的炎性介质通过诱导VR1的脂肪酸激动剂生成来激活辣椒素受体。本研究表明,缓激肽作用于B2缓激肽受体,通过花生四烯酸的12-脂氧合酶代谢产物的生成激活辣椒素受体,从而使感觉神经末梢兴奋。这一发现确定了一种机制,可能成为开发治疗炎性疼痛新策略的靶点。