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脊髓水平环氧合酶和前列腺素E_2在术后痛觉超敏中的作用 被引量:3

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摘要 目的探讨脊髓水平环氧合酶两种亚型(COX-1和COX-2)以及主要致痛物质前列腺素E2(PGE2)在术后痛觉超敏中的作用。方法采用大鼠术后疼痛模型,分别通过Western blot和ELISA的方法,观察大鼠术后疼痛形成和发展的过程中COX-1和COX-2蛋白和PGE2表达的变化。同时,通过检测大鼠机械缩足发射阈值来测定痛觉超敏情况。结果①行为学观察:与术前和非手术侧相比,大鼠术后2 h术侧后足机械缩足反射阈值(MWT)明显下降(P<0.01),此后逐渐升高,5 d以后恢复正常。②Western blot分析:与术前相比,术后2 h脊髓中COX-1和COX-2蛋白表达明显增加,4 h达到高峰(P<0.01),COX-1蛋白表达增加一直持续到24 h,而COX-2仅持续到术后6 h。③ELISA检测:术后大鼠腰段脊髓中PGE2含量迅速增高,4 h达高峰(P<0.01),术后24 h虽有所降低,但与术前相比差异有显著性(P<0.05)。结论脊髓水平COX主要是COX-1和PGE2参与切口痛大鼠术后痛觉超敏的形成和早期维持过程。
出处 《广东医学》 CAS CSCD 北大核心 2008年第4期570-572,共3页 Guangdong Medical Journal
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