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《BEIJING BIOMEDICAL ENGINEERING》 1998-02
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Protective Effect of Selenium on Human Erythrocyte Rheology 

Huang Yimin,Yu Xin,Han Ling,Gu Yun,Jin Ming,Chen Baotian (Beijing Institute of Heart Lung & Blood Vessel Disease,Beijing 100029)Guo Jinliang,Li Yong(Dept.of Chemistry,Tsing Hua University,Beijing 100084)  
To assess the protective effect of selenium on RBC rheology in cardiac ischemia/reperfusion,in two groups of patients with VSD or ASD(in selenium group,each patient was orally administrated selenium 400μg perday for 5 to 12 days preopen heart surgery,in control group,each one was without selenium treatment) who were undergoing cardiopulmonary bypass,blood samples were taken from the coronary sinus,and ascorbyl free radical (A·),peroxidants(MDA),antiperoxidative activities (plasma SOD,erythrocyte GSHPx),the membrane shear elastic modulus of RBC(μ),molecular rotational correlation times of lipids and proteins of RBC membrane(τ1,τp)were measured and compared.Results show that myocardial reperfusion only for one minute,in both groups A·were significantly increased(increasing percentage in control group +68%,in selenium group +66%),but selenium group had lower MDA and GSHPx activity.On contrary to high A·level in control group,A·of selenium group were dropped about half since reperfusion 5 minutes and returned to preischemia level.After myocardial reperfusion,control group had a specific changes in membrane μ values as well as an evidently prolonged τ1 and τp.Simultaneously,except τp at 5 minutes of reperfusion was obviously prolonged,no changes in the membrane μ and τ1 were observed in selenium group during cardiac ischemia/reperfusion period.Above results indicate that selenium can protect RBC rheology from free radical damage during myocardial sichemia/reperfusion.
【CateGory Index】: R318.01,
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