急性水肿性胰腺炎大鼠胰腺微血流变化和环氧合酶-2的表达

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目的 探讨环氧合酶-2(COX-2) mRNA的表达在急性水肿性胰腺炎(AEP)大鼠胰腺局部微血管变化中的作用.方法皮下注射蛙皮缩胆囊肽(Caerulein)诱发急性水肿性胰腺炎.RT-PCR检测胰腺COX-2 mRNA表达.分光光度法检测胰腺炎指标:血浆髓过氧化酶(MPO)和血清淀粉酶(AMS)的活性.异硫氰酸荧光素标记红细胞(FITC-RBC) 技术对胰腺活体进行局部微血管观察.结果 COX-2 mRNA在正常对照组各时点均呈低水平表达,而在AEP组表达在Caerulein诱发后上调;与正常组相比,AEP组血清淀粉酶(AMS)、血浆髓过氧化酶(MPO)活性水平增加(P<0.05);与对照组相比, AEP组的胰腺微血管改变如下:胰腺毛细血管血流4~8 h减少、功能毛细血管密度4~8 h减少、毛细血管在8 h趋于通透.结论 COX-2在AEP组中的表达上调是客观反映胰腺微循环功能损害,如毛细血管灌流、血流及组织水肿等的指标。

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