目的观察软脉灵口服液对ApoE基因敲除小鼠动脉粥样硬化斑块内血管新生的影响,探讨其稳定斑块的机制。方法30只6～8周龄ApoE基因敲除小鼠,饲以高脂饲料12周后,随机分为模型组、软脉灵组、辛伐他汀组,另以6只正常C57BL/6J小鼠作为对照组。分别给药12周后,小鼠眼眶静脉采血测定胆固醇(TC)、三酰甘油(TG)、低密度脂蛋白胆固醇(LDL-C)、高密度脂蛋白胆固醇(HDL-C),HE染色观察小鼠主动脉病理形态学变化,免疫组化法测定以CD105标记的斑块内微血管密度(MVD)及小鼠主动脉CD105表达。结果与模型组比较,软脉灵组、辛伐他汀组TC、LDL-C、TG 显著降低,而 HDL-C 显著升高(P＜0.01)；且病理损伤程度减轻,MVD 降低,CD105蛋白表达显著降低(P＜0.01)。软脉灵组与辛伐他汀组比较,上述指标差异无统计学意义(P＞0.05)。结论软脉灵口服液可能通过降低斑块内CD105蛋白表达,抑制血管新生,达到稳定动脉粥样硬化斑块目的。%Objective To observe the effect of Ruanmailing Oral Liquid on angiogenesis in atherosclerosis plaque of Apolipoprotein E (ApoE) gene knock-out mice, and explore the mechanisms of plaque stabilizing. Methods Totally 30 mice 6-8 weeks old ApoE knockout mice were fed a high fat diet for 12 weeks until the formation of a mature atherosclerotic plaque. They were randomly divided into three groups-model group, Ruanmailing group, simvastatin group, with another 6 normal C57BL/6J mice as the control group, and were administered for 12 weeks. Blood was extracted from orbital venous to measure the lipid (TC, TG, LDL-C, HDL-C) variation. HE-stain was used to observe aortic pathomorphological changes, meanwhile, immunohistochemical method was adopted to determine the microvessel density of plagues which is marked by CD105, as well as the expression of CD105 in aorta. Results Compared with the model group, TC, LDL-C, TG of Ruanmailing group and simvastatin group decreased significantly, while HDL-C increased significantly (P<0.01), degree of pathological damage was reduced, microvessel density and the expression of CD105 was significantly lower (P<0.01). There was no significant difference between Ruanmailing group and simvastatin group in above-mentioned indicators (P>0.05). Conclusion Ruanmailing Oral Liquid may reduce the expression of CD105 and inhibit the angiogenesis within the plaque, which is the possible mechanism of stabilizing the atherosclerotic plaque.
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