中文摘要：

目的：探讨野木瓜注射液对炎性疼痛模型小鼠的消炎镇痛作用及机制。方法：采用足底皮内注射角叉菜胶制备小鼠炎性疼痛模型，对治疗组小鼠皮下注射12．5％、50％和100％野木瓜注射液，于4、12、24、48 h后测各组小鼠足趾肿胀值和足底热痛阈值，并取小鼠第五腰椎（L5）背根神经节（DRG）行免疫组化染色，检测环氧化酶2（COX-2）蛋白的表达。结果：造模后，模型组小鼠足趾肿胀持续明显，足底热痛阈值持续降低。至48 h时，与对照组相比，模型组足趾肿胀明显；与对照组相比，模型组足底热痛阈值显著降低。与模型组相比，低、中、高剂量野木瓜注射液均可降低小鼠足趾肿胀度，恢复小鼠的热痛阈值，且下调L5 DRG中COX-2的蛋白表达至模型组的70％、66％和30％。结论：野木瓜注射液能降低伤害性刺激诱导的L5 DRG中COX-2蛋白表达，起到抗炎镇痛的效果。

英文摘要：

AIM： To investigate the effect of injection stauntoniae （ IS） on inflammatory pain responses in mice.METHODS：The carrageenan test was used to determine the anti-inflammatory and analgesic effects of IS .Except for control group, the mice in other groups received an injection of λ-carrageenan solution （1%, 50 μL） into the plantar region of the left hind paws , followed by a subcutaneous injection of IS at doses of 12.5%, 50%and 100%or equal vol-ume of 0.9%NaCl.Both paw edema and hyperalgesia to thermal stimulation were measured 4 h, 12 h, 24 h and 48 h after the injection of λ-carrageenan solution.The lumbar-5 （L5） dorsal root ganglions （DRGs） of the mice were taken to inves-tigate the cyclooxygenase 2 （ COX-2） expression by immunohistochemical staining .RESULTS：Subcutaneous injection of IS potently inhibited paw edema and hyperalgesia induced by λ-carrageenan in the mice accompanied with the inhibition of COX-2 protein expression in L 5 DRGs.CONCLUSION：IS exerts the anti-inflammatory and analgesic effects on the in-flammatory responses by inhibiting the protein expression of COX-2 in DRGs.