茶色素对兔实验性动脉粥样硬化的预防作用
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Preventive Effects of Tea Pigment on Experimental Atherosclerosis in Hypercholesterolemia Rabbits
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    摘要:

    为探讨茶色素对高胆固醇兔动脉粥样硬化的影响,将2 4只新西兰雄性白兔按血脂水平随机分为对照组、茶色素低剂量组[32 μg (g·d) ]和高剂量组[96 μg (g·d) ],每组8只,实验期间均以高胆固醇饮食。喂养8周后处死动物,测定血脂水平、血浆内皮素水平和斑块面积比。结果发现,实验4周及8周后血清总胆固醇和甘油三酯水平明显高于实验前,但三组间没有明显差异。实验8周后对照组、茶色素低剂量组和高剂量组血浆内皮素水平分别为775 .5 8±6 6 8.72 μg L、2 5 1.73±2 41.5 7μg L和6 5 .43±17.18μg L。与对照组相比,茶色素低剂量组内皮素水平有所降低,但无显著性差异(P>0 .0 5 ) ,茶色素高剂量组内皮素水平明显降低(P<0 .0 5 )。对照组、茶色素低剂量组和高剂量组动物胸主动脉斑块面积百分比分别为0 .793±0 .0 77、0 .5 88±0 .2 0 5和0 .437±0 .116 ,内膜面积与中膜面积百分比分别为0 .6 2 5±0 .2 0 6、0 .32 6±0 .2 76和0 .175±0 .0 92 ,茶色素组斑块面积明显低于对照组(P<0 .0 5 )。结果提示,茶色素能够防止兔实验性粥样斑块的形成,并降低血浆内皮素水平

    Abstract:

    Aim To investigate the effects of tea pigment on experimental atherosclerosis in hypercholesterolemia rabbits.Methods According to serum cholesterol and triglyceride level twenty-four rabbits were divided into control group fed with high cholesterol diet, low dose tea pigments group fed with high cholesterol diet and 32 μg/g·d tea pigments orally, high dose tea pigments group fed with high cholesterol diet and 96 μg/g·d tea pigment orally. After 8 weeks, all animals were killed to determine the serum lipids, plasma endothelin, the percent of thoracic aorta inner surface covered by plaque and the ratio of intimal to medial cross-sectional areas in ascendent aorta. Results Tea pigments had no effect on lipid level within the experimental doses.The plasma endothelin level was reduced in high dose tea pigments group (P<0.05). The aorta plaque areas in both tea pigment groups were significantly lower than that of control group (P<0.05). Conclusions It is suggested that tea pigments could protect the formation of aorta plaque and reduce the level of endothelin in plasma in the hypercholesterolemia rabbits.

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伭万里,王申五,韩驰,陈君石.茶色素对兔实验性动脉粥样硬化的预防作用[J].中国动脉硬化杂志,2000,8(2):131~132.

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  • 收稿日期:1999-10-27
  • 最后修改日期:2000-05-15
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