期刊
PAIN
卷 154, 期 9, 页码 1749-1757出版社
LIPPINCOTT WILLIAMS & WILKINS
DOI: 10.1016/j.pain.2013.05.032
关键词
Voltage-gated sodium channel; Allodynia
资金
- NHMRC [569918, APP1019761]
- Australian Postgraduate Award
- Australian Research Council
- Cancer Council Research Grant
- National Institutes of Health [R01NS41233]
Cold allodynia, pain in response to cooling, occurs during or within hours of oxaliplatin infusion and is thought to arise from a direct effect of oxaliplatin on peripheral sensory neurons. To characterize the pathophysiological mechanisms underlying acute oxaliplatin-induced cold allodynia, we established a new intraplantar oxaliplatin mouse model that rapidly developed long-lasting cold allodynia mediated entirely through tetrodotoxin-sensitive Na-v pathways. Using selective inhibitors and knockout animals, we found that Na(v)1.6 was the key isoform involved, while thermosensitive transient receptor potential channels were not involved. Consistent with a crucial role for delayed-rectifier potassium channels in excitability in response to cold, intraplantar administration of the K+-channel blocker 4-aminopyridine mimicked oxaliplatin-induced cold allodynia and was also inhibited by Na(v)1.6 blockers. Intraplantar injection of the Na(v)1.6 activator Cn2 elicited spontaneous pain, mechanical allodynia, and enhanced 4-aminopyridine-induced cold allodynia. These findings provide behavioural evidence for a crucial role of Na(v)1.6 in multiple peripheral pain pathways including cold allodynia. (c) 2013 International Association for the Study of Pain. Published by Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据