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期刊论文

Inhibitory effect of intrathecal meptazinol on carrageenan-induced thermal hyperalgesia in rats

仇缀百Hua Zhanga Yu-Qiu Zhangab* Zhui-Bai Qiuc Zhi-Qi Zhaoa

Neuroscience Letters 356(2004)9-12,-0001,():

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摘要/描述

The effect of meptazinol in the spinal cord on carrageenan-induced hyperalgesia was investigated. The latency of paw withdrawal (PWL) to a thermal stimulus was used as an index of inflammatory hyperalgesia in awake rats. Intrathecal (i.t.) injection of 10 and 100mg meptazinol markedly increased the PWL of the carrageenan-injected paw (P, 0:01). The PWL of the non-injected paw was not detectably affected by the administration of meptazinol at the doses tested. I.t. injection of naloxone (5mg) or atropine (1mg) alone exhibited no effect on the PWLs of either the carrageenan-injected or non-injected paw. Pretreatment with naloxone, but not atropine, completely blocked the meptazinol-induced anti-hyperalgesia. These observations suggested that mu opioid receptor rather than muscarinic acetylcholine receptor may be involved in the anti-hyperalgesia of meptazinol in the spinal cord.

版权说明:以下全部内容由仇缀百上传于   2006年07月06日 19时14分20秒,版权归本人所有。

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