摘要
目的 :建立动脉粥样硬化大鼠模型。方法 :4 0只雄性 Wistar大鼠随机分成对照组 (10只 )和实验组 (30只 )。实验组在喂食开始时一次性腹腔注射维生素 D 6 0万 IU / kg,喂食高脂饲料 ;对照组给予同等体积的生理盐水 ,喂食基础饲料。观察主动脉、心脏、肝脏的病理变化 ,并根据病变程度评分。结果 :对照组大鼠未出现明显病变。实验组大鼠 2周后未出现明显病变。4周后大鼠主动脉出现动脉粥样硬化斑块 ,病变评分为 0 .5 0± 0 .39;冠状血管仅出现少量脂质浸润 ;心肌组织有少量脂质沉积 ;肝脏切片油红 O染色呈强阳性。 6周后主动脉斑块增多 ,病变评分为 0 .75± 0 .34;冠状动脉形成典型动脉粥样硬化病变 ,病变评分为 1.12± 0 .4 8;心肌组织脂质沉积严重 ,病变区心肌细胞胞质内出现大量红染颗粒。其发病病理过程与人类相似。结论 :成功建立了快速简便的大鼠动脉粥样硬化模型 。
Objective: To establish an experimental model of atherosclerosis in rats and to study the atherosclerotic lesions in the aorta,heart and liver.Methods: The rats in experimental groups were injected with a single dose of vitamin D (600 000 IU/kg) and loaded with high fat diet;control group was given saline and basic food.The pathological changes were observed in the aorta,heart and liver after 2,4,6 weeks.The scores were evaluated according to the pathological degrees.Results: No changes were observed after 2 weeks,but after 4 weeks atheroslerotic plaques were seen in the aorta and the score of the lesions were 0.50±0.39; a little lipid were found in coronary arteries;deposition of lipid was seen in the myocardium; many positive red pellets were found in the plasma of cells in the liver.After 6 weeks,more atheroslerotic plaques were observed in the aorta,and atheroslerotic plaques in coronary arteries were formed (pathological score 1.12±0.48); abundant positive red pellets were found in the plasma of the cardiac myocyte.The pathological changes occurred in rats were very similar to that of man.Conclusion: The experimental model of atherosclerosis in rat may be conveniently established by injection of vitamin D with loading of high fat diet,which can be used for the pathological and pharmacological study of atherosclerosis.
出处
《第二军医大学学报》
CAS
CSCD
北大核心
2003年第7期802-804,共3页
Academic Journal of Second Military Medical University
基金
国家自然科学基金 ( 3 9870 870 )
