摘要
目的观察西红花苷对实验性高脂血症的影响并探讨其作用机制。方法采用高胆固醇饮食饲养SD大鼠2个月,造成高脂血症模型,观察西红花苷对大鼠血脂质的影响。此外体外培养大鼠主动脉平滑肌细胞(SMC),以加高脂血清和加西红花苷等不同培养基分组培养,用四甲基偶氮唑盐微量酶反应(MTT)法检测平滑肌细胞活性,以Western杂交检测p38MAPK磷酸化。结果西红花苷能明显降低血胆固醇,甘油三酯、LDL含量,升高HDL及其亚型含量。西红花苷可明显抑制高脂血清培养下SMC的增殖,其吸光度低于造模组。高脂血清组磷酸化p38MAPK的表达有所增加,加入西红花苷后可显著降低p38MAPK的活化,并能逆转高脂血清诱导的SMC增殖。结论西红花苷可有效地调整脂蛋白代谢,抑制SMC增殖,并通过抑制p38MAPK而使平滑肌细胞增殖减少,从而防治高脂血症、阻止动脉粥样硬化发生发展。
Objective: To study the effect of crocin on rat experimental hyperlipemia and its mechanisms. Method: Hyperlipemia model was established by feeding heavy cholesterol for 2 months and the effect of crocin on blood lipid in experimental hyperlipemia rats was observed. Aortic smooth muscle cells were cultured in different culture media and proliferation was measured by MTT assay. Western blotting was used to detect the effect of crocin on phosphorylation of p38 MAPK. Result: Crocin not only decreased greatly the content of cholesterol,triglyceride and density lipoprotein in blood, but also increased the content of high density lipoprotein. In addition, the proliferation of smooth muscle cells and the activation of p38MAPK were inhibited by Crocin. Conclusion: Crocin prevents atherosclerosis in hyperlipemia, which may be mediated by the inhibition of both proliferation of smooth muscle cells and activation of p38MAPK. [
出处
《中国中药杂志》
CAS
CSCD
北大核心
2005年第5期369-372,共4页
China Journal of Chinese Materia Medica
