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氯胺铜对大鼠交感神经节NO与NOS的抑制作用 被引量:1

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摘要 目的以观察大鼠切口疼痛模型中皮下注射(sc)氯胺酮对外周交感神经节一氧化氮(NO)和一氧化氮合酶(NOS)的影响。方法雄性SD大鼠65只,行为学评分分组:分五组,每组5只:生理盐水组,氯胺酮组(5mg/kg组,10mg/kg组,20mg/kg组),吗啡组;NO和NOS测定分组:分五组,每组8只:正常组,生理盐水组,氯胺酮组(10mg/kg组,20mg/kg组),吗啡组。按Brennan法[1]制成切口疼痛模型,以累积疼痛评分和冷刺激评分确定疼痛行为。在给药后30min快速脱臼处死动物取交感神经节,用分光光度计测定NOS(总NOS和iNOS)活性,酶标仪测定NO含量。结果累积疼痛评分和冷刺激评分,氯胺酮组(10mg/kg组,20mg/kg组)、吗啡组均低于生理盐水组(P<0.05)。NO含量测定,氯胺酮组(10mg/kg组,20mg/kg组)、吗啡组均低于生理盐水组(P<0.05)。NOS活性测定,氯胺酮组(10mg/kg组,20mg/kg组)、吗啡组均低于生理盐水组(P<0.05)。但与正常组没有明显差别。结论在大鼠切口疼痛模型中,皮下注射不同剂量氯胺酮,其镇痛机制可能与降低外周交感神经系统NO含量和NOS活性有关。
出处 《国际医药卫生导报》 2006年第4期4-6,共3页 International Medicine and Health Guidance News
基金 国家自然科学基金(39970715) 广西自然科学基金(自0447045)
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