陈皮半夏对颈动脉硬化家兔血管细胞黏附分子-1及基质金属蛋白酶-9表达的影响

Effect of Tangerine Peel and Pinellia Ternata on Expression of VCAM-1 and MMP-9 in Carotid Atherosclerosis Rabbits

目的观察对药陈皮半夏对颈动脉粥样硬化家兔血管细胞黏附分子-1(VCAM-1)及基质金属蛋白酶-9(MMP-9)的干预作用,探讨抗动脉硬化的作用机制。方法将25只雄性新西兰白兔随机分为正常组、模型组和中药大、中、小剂量组。正常组给予基础饲料喂饲,模型组和中药组予高脂饲料喂饲,并在喂饲1周后实施颈动脉内膜空气干燥术,术后中药组按10、8、6 mL/kg剂量予陈皮半夏煎剂灌胃,每日1次。4周后处死家兔,取每只家兔右侧颈动脉远端1 cm,固定后行HE染色,观察病理改变。应用免疫组化SABC法检测VCAM-1和MMP-9表达情况。结果模型组血管壁泡沫细胞、平滑肌细胞和内皮细胞的胞浆中有VCAM-1和MMP-9强阳性表达,显著高于正常组(P<0.01)。中药组细胞内VCAM-1和MMP-9阳性表达显著低于模型组(P<0.01),且随剂量的增加,陈皮半夏煎剂对VCAM-1和MMP-9的抑制逐渐增强。结论对药陈皮半夏可以有效抑制颈动脉硬化家兔VCAM-1和MMP-9的表达,提示其可能是通过抑制血管炎症反应、稳定斑块而发挥抗颈动脉硬化作用的。

Objective To research the influence of tangerine peel and pineUia temata on the expression of VCAM-1 and MMP-9 in carotid atherosclerosis rabbits, and explore its mechanism. Methods Totally 25 male rabbits were divided into control group, model group and Chinese medicine group. Control group was treated with basic diet, model group and Chinese medicine group were treated with both high-fat diet and carotid artery intima-alr drying technique. Chinese medicine decoction group was treated with tangerine peel and pinellia ternata decoction, as 10, 8, 6 mL/kg, for 4 weeks. Then the right carotid was cut and fhxed, and pathological changes were observed by HE staining. The expressions of VCAM-1 and MMP-9 were observed by immunol histochemistry SABC method. Results Compared with control group, the expression of VCAM-1 and MMP-9 in model group was significantly increased （P〈0.01）. And compared with model group, tangerine peel and pinellia temata decoction significantly restrained VCAM-1 and MMP-9 expression （P 〈0.05）. Conclusion Tangerine peel and pineUia ternata could restrained VCAM-1 and MMP-9 expression in carotid atherosclerosis rabbits, suggesting that its mechanism may be related with inhibiting vascular inflammatory reaction and stabilizing plaques.