黑木耳多糖对动脉粥样硬化血管平滑肌细胞表型转化及bFGF和PDGF表达变化的研究

目的通过黑木耳多糖对血管平滑肌细胞表型转化及bFGF和PDGF表达变化的影响,探讨黑木耳多糖降血脂和抗氧化以外的抗动脉粥样硬化形成作用。方法将30只新西兰白兔随机分为正常对照组、模型组和实验组3组,分别给予普通饲料(正常组)、高胆固醇饲料(模型组)以及高胆固醇加黑木耳多糖饲料(实验组)喂养。第12周末处死动物,取主动脉行组织形态学观察及用透射电镜和免疫组织化学方法分析平滑肌细胞表型转化及bFGF和PDGF表达变化。结果实验组主动脉斑块面积明显小于模型组,模型组和实验组分别为(0.44±0.10)和(0.30±0.83),两组比较差异有统计学意义(P<0.01);透射电镜和免疫组化结果显示:模型组动脉粥样硬化斑块的平滑肌细胞内内质网、线粒体增多,主要为合成表型;而实验组平滑肌细胞内内质网、线粒体少,主要为收缩表型,并且斑块内bFGF和PDGF的表达减少。结论黑木耳多糖可抑制动脉粥样硬化过程中血管平滑细胞从收缩表型向合成表型的转化,从而抑制平滑肌细胞合成和分泌bFGF、PDGF和其他细胞外基质的能力,从而减少动脉粥样硬化形成中血管平滑肌细胞参与的过程。

Effects of Auricularia Auricula Polysaccharide on the Phenotypes of Vascular Smooth Muscle Cells and the Expression of bFGF and PDGF in Atherogenesis

Objective To explore the effect of auricularia auricula polysaccharide on the phenotypes of vascular smooth muscle cells(VSMCs) and the also expression of basic fibroblast growth factor(bFGF) and platelet-derived growth factor(PDGF) in the formation of atherosclerosis(AS).Method Thirty New Zealand white rabbits were randomly divided into three groups: normal group,model group and experimental group.The period of experiment is twelve weeks.Normal group received normal food chow.Model group received normal ch...