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[摘要]
目的研究氧化槐定碱(OSR)的镇痛作用及维拉帕米(Vet)对OSR镇痛作用的影响。方法采用小鼠醋酸扭体法,观察OSR的镇痛作用;采用热板法观察CaCl2和Ver对OSR镇痛作用的影响;采用硝酸还原酶法测定血清NO水平。结果OSR呈剂量依赖性抑制醋酸导致的小鼠扭体反应,延长小鼠舔后足潜伏期;其镇痛作用可被CaCl2拮抗,被Ver增强;OSR镇痛作用同时未见其对小鼠血清NO水平产生明显的影响。结论OSR有明显镇痛作用,Ver能增强OSR镇痛作用。
[Key word]
[Abstract]
Objective To investigate the analgesic effect of oxysophoridine(OSR)and the influence of verapamil(Ver)on the antinociception of OSR when two drugs were co-administrated in mice.Methods The number of writhing within 15 min after ip different doses of OSR was observed in painful mouse mo- dels caused by acetic acid.The hot plate method was used to assess nociceptive sensitivity of CaCl2 and Ver before ip OSR.Nitric oxide(NO)in serum was measured by spectrophotometry.Results The number of writhing was decreased and the latency of licking the hind paws was prolonged in a dose-dependent manner after ip OSR.The antinociception of OSR could be antagonized by CaCl2 and enhanced by Ver.No inter- ference was detected in serum volume of NO.Conclusion These results suggest that OSR can antagonize the acute pain caused by acetic acid and hot plate in a dose-dependent manner in mice.Calcium channel blocker could enhance the effect of OSR.
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[基金项目]
宁夏自然科学基金(0658);宁夏医学院重点科研项目(XZ200701)