壳多糖对实验性家兔动脉粥样硬化的作用

目的 :观察壳多糖对实验性家兔动脉粥样硬化的影响。 方法 :采用高脂喂养的家兔动脉粥样硬化模型 ,实验分为普食组、高脂组、壳多糖高脂组、壳多糖普食组 ,第 0、4、8周空腹采血测定血脂含量 ,第 8周处死动物 ,制备主动脉标本 ,油红 O染色观察并测定降主动脉粥样硬化斑块面积 ,升主动脉 H- E染色。 结果 :第 4、8周壳多糖高脂组三酰甘油 (TG)、总胆固醇(TC)、低密度脂蛋白胆固醇 (L DL- C)均低于高脂组 (P<0 .0 5或 0 .0 1 ) ,普食组与壳多糖普食组血脂水平相似 ;壳多糖高脂组的斑块面积显著小于高脂组 (30 .5 5± 7.5 0 ) % vs(5 6 .6 8± 7.1 1 ) % ,P<0 .0 1 ];H- E染色示壳多糖高脂组内膜增厚轻于高脂组。 结论 :壳多糖具有抗动脉粥样硬化作用 ,与其降低血脂有关

Effects of chitosan on experimental rabbit atherosclerosis

Objective:To investigate the effects of chitosan on experimental rabbit atherosclerosis(AS).Methods:The models of rabbit AS were produced by a high fat diet.The rabbits were randomly assigned into normal diet(ND) group,high fat diet(HFD) group,chitosan and high fat diet(CHFD) group,chitosan and normal diet(CND) group.Fasting blood samples were collected for serum lipid assay on 0,4,8 weeks;the animals were killed on the 8th week to make aorta samples.AS plaque areas were estimated in the descending aorta dyed with oil red O and the ascending aorta dyed with H E.Results:TG,TC,LDL C in the CHFD group were lower than those in HFD group on 4 and 8 weeks;serum lipid concentration in ND group was similar with that in CND group;plaque areas in CHFD group were smaller than those in HFD group;intima thickness in CHFD group was thinner than that in HFD group.Conclusion:Chitosan reduces AS degree in rabbits of HFD group,which might be related to the decrease of serum lipid.