Effect of chronic iron overload on atherosclerosis lesion in apolipoprotein E knockout mice

XIE Xiu-mei 1,CAO Xia 2,CHEN Mei-fang 1,ZHOU Yu-cheng 1,CHEN Xiao-bin 2,JIANG Hai-ying 3(1.Department of Geriatric Medicine;2.Department of Cardiology;3.Department of Pathology,Xiangya Hospital,Central South University,Changsha 410008,China)  

TitleEffect of chronic iron overload on atherosclerosis lesion in apolipoprotein E knockout mice AuthorXIE Xiu-mei 1,CAO Xia 2,CHEN Mei-fang 1,ZHOU Yu-cheng 1,CHEN Xiao-bin 2,JIANG Hai-ying 3(1.Department of Geriatric Medicine;2.Department of Cardiology;3.Department of Pathology,Xiangya Hospital,Central South University,Changsha 410008,China) Objective To explore the effect of chronic iron overload on the lesion of atherosclerosis(AS)in apolipoprotein(Apo)E knockout mice.Methods Twenty-four ApoE knockout mice were randomly divided into ApoE knockout group(0.1 mL saline for 4 weeks)and iron overload group(10 mg iron dextran for 4 weeks).The levels of serum iron(SI),total iron binding capacity,contents of malondialdehyde(MDA),and acti-vity of superoxide dismutase(SOD)in the liver were measured.Iron deposition in the liver and heart was determined,and atherosclerotic plaque areas of the sinus aortae were analyzed.Results In the iron overload group,the levels of SI increased by 377.86%,the saturation of transferrin increased by 121.98% and the levels of iron in the liver increased by 2 548.15%(P 0.01).The contents of MDA in the liver increased by 32.51%(P 0.01),and the activity of SOD in the liver decreased by 17.2% in the ApoE knockout group(P 0.05).The level of MDA in the liver increased by 411.15%,and the acti-vity of SOD in the liver decreased by 46.84% in the iron overload group(P 0.01).There was a significant deposition of iron in the liver and heart of mice,and the areas of atherosclerotic plaque of sinus aortae increased markedly in the iron overload group.Conclusion Chronic iron overload may promote the development of AS lesion in the ApoE knockout mice,in which the increased oxidative stress and lipid oxidation may involve. Keywordsiron overload;atherosclerosis;oxidative stress

【CateGory Index】： R543.5

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