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鞘内注射吗啡和PKC抑制剂对SNI模型大鼠镇痛效应的影响

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摘要 目的:观察鞘内注射吗啡和PKC抑制剂对坐骨神经分支结扎切断模型(SNI模型)大鼠的镇痛效果,探讨鞘内注射吗啡对神经病理痛大鼠的镇痛机制。方法:30只SD大鼠,随机分为6组:对照组(C组,n=5)、假手术组(N组,n=5)、生理盐水组(NS组,n=5)、吗啡组(M组,n=5)、PKC抑制剂组(P组,n=5)、吗啡和PKC抑制剂组(MP组,n=5)。每组均进行疼痛行为学观察。结果:SNI模型大鼠在术后第1天和第2天出现明显的痛觉过敏(机械性异常疼痛痛阈降低),与术前比较差异有统计学意义(P<0.01)。M组、P组和MP组在注药30min后均使痛阈明显提高,与注药前比较差异有统计学意义(P<0.01);其中MP组的痛阈比M组和P组明显提高(P<0.05)。结论:SNI模型可引起大鼠损伤侧肢体痛觉过敏(机械性异常疼痛),大鼠后爪跖外侧面痛敏明显大于跖内侧面。鞘内注射吗啡和PKC抑制剂组镇痛效应明显优于单纯吗啡组。
出处 《实用医技杂志》 2007年第11期1509-1511,共3页 Journal of Practical Medical Techniques
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