动脉粥样硬化家兔血浆及组织金属硫蛋白含量变化

Changes of metallothionein contents in plasma and tissues of rabbit with atherosclerosis

目的 :在家兔动脉粥样硬化 (AS)模型上观察肝、主动脉组织及血浆金属硫蛋白 (MT)含量变化 ,认识AS时机体氧化防御系统的改变。方法 :家兔高脂饮食 8周 ,复制高脂血症 -动脉粥样硬化模型 ,分别以[10 9Cd]血红蛋白饱和法和硫代巴比妥酸法测定家兔肝、主动脉组织及血浆MT及丙二醛 (MDA)含量。结果 :AS家兔肝组织和血浆MT水平分别较对照组高 318% (P <0 0 1)和 6 2 % (P <0 0 1) ,而主动脉组织MT含量较对照组低 33 % (P <0 0 1)。肝、主动脉组织及血浆MDA含量分别较对照组高 95 % (P <0 0 1) ,76 % (P <0 0 5 )和 42 % (P <0 0 1) ,肝组织 ,血浆MT变化与MDA变化相关。结论 :AS家兔肝组织和血浆MT产生增多与脂质过氧化损伤有关。

AIM: To observe the level of metallothionein (MT) in liver, aorta and plasma of rabbit with atherosclerosis (AS) in order to recognize the alteration of oxidative defense system in body when AS occurred.METHODS:Preparation of AS model of rabbit induced by having high-fat diet for eight weeks; the levels of MT and malondialdehyde (MDA) were measured in the tissues of liver and aorta and plasma of rabbit.RESULTS:The MT levels in liver tissues and plasma in atherosclerotic group increased 318%( P <0 01) and 62% ( P <0 01), compared with control group, but its level in aortic tissue in atherosclerotic group decreased 33% ( P <0 01). The MDA levels in liver, aortic and plasma in atherosclerotic group increased 95%( P <0 01), 76%( P <0 01) and 42%( P <0 01), respectively, compared with control group. The changes of contents of MT in liver and plasma have relation with level of MDA in liver tissues and plasma.CONCLUSION:The alteration of MT in liver tissues and plasma in atherosclerotic rabbits may be related to lipid hyperoxidative injury.