巨细胞病毒感染的载脂蛋白E基因敲除小鼠动脉粥样硬化发生的可能机制  

The Mechanism of Murine Cytomegalovirus Infection Contributing to Atherogenesis in Apolipoprotein E Knockout Mice

作　　者：陈瑞珍[1] 熊思东[2] 许从峰[1] 杨英珍[1] 邹云增[1] 葛均波[1] 陈灏珠[1] 

机构地区：[1]复旦大学附属中山医院上海市心血管病研究所卫生部病毒性心脏病重点实验室,上海市200032 [2]复旦大学免疫学系,上海市200032

出　　处：《中国动脉硬化杂志》2008年第8期589-592,共4页Chinese Journal of Arteriosclerosis

基　　金：国家自然科学基金(30571741);教育部新世纪优秀人才计划(NCET-06-0354);国家973项目(2007CB512003)

摘　　要：目的研究巨细胞病毒感染引起的免疫损伤导致动脉粥样硬化发生的可能机制。方法载脂蛋白E基因敲除的8周龄C57BL/6雌性小鼠,随机分成对照组、高脂饮食组、鼠巨细胞病毒感染组和高脂饮食+鼠巨细胞病毒感染组。在不同时间段分别处死小鼠,截取主动脉,利用逆转录聚合酶链反应、免疫组织化学等方法检测主动脉单核细胞趋化因子1、生长相关癌基因α、Fractalkine和调节活化正常T细胞表达与分泌的趋化因子的表达。结果第8周时,巨细胞病毒感染后可显著提高生长相关癌基因α在主动脉的表达,并可诱导Fractalkine、活化正常T细胞表达与分泌的趋化因子和单核细胞趋化因子1的表达,而在高脂饮食+巨细胞病毒感染的小鼠主动脉组织中,Fractalkine的表达较其它组明显升高。第12周时,高脂饮食+巨细胞病毒感染组中Fractalkine和活化正常T细胞表达与分泌的趋化因子和单核细胞趋化因子1的表达较其它组更高些。免疫组织化学结果发现,高脂饮食后,生长相关癌基因α、Fractalkine和单核细胞趋化因子1的表达均有明显升高,但Fractalkine的表达较局限,单核细胞趋化因子1和生长相关癌基因α在整个血管壁都存在,但以内膜较高。单纯巨细胞病毒感染组与高脂饮食组相似,可诱导单核细胞趋化因子1、生长相关癌基因α和Fractalkine的表达,但不同的是Fractalkine的表达广泛存在。而高脂饮食+巨细胞病毒感染组单核细胞趋化因子1、生长相关癌基因α和Fractalkine表达的升高更为明显,尤其是斑块部位。结论巨细胞病毒感染后通过调节趋化因子表达水平的改变,从而促进炎症细胞的迁移,促进动脉粥样硬化的发生。Aim To study the immmunologic injury mechanism of atherogenesis by mtwine cytomegalolovrus （MCMV） infection. Methods Animal model of atherosclerosis （C57BId6） with apolipoprotein E knockout mice were randomized to four groups： control group, hypercholesterol diet group, MCMV infection group, MCMV infection add hypercholesterol diet group, respectivcly. Mice from each group were sacrificed in different period. Portions of aortas were kept in - 80℃. The expression of monocyte chemaattractant protein-1 （MCP-1）, growth-related oncogene-α （GRO-α）, fractalldne （FKN） and regulated activation nonnal T cell expressed arid secreted （RANTES） in aortas were detected by RT-PCR and inm,unnbdstochemistry. Results In the 8th week, the expression of GRO-α in aorta tissues was significant by CMV infection, and the expression of FKN, RANFES aJld MCP-1 was induced. The expression of FEN was more significant in MCMV infection add hypercholesterol diet group than other groups. In the 12th week, the expression of FKN and RANTES was marked than others. Inununohistochemistry staiting also showed that the expression of MCP-1, GRO-α asld FKN was enhanced in athemsclerotic lesion, but expression of FKN was variable, and correlated with the atherosdemtic plaque. Condusion MCM＇V infection could contribute to atherogenesis by inducing file expression of chemokines and enhance the migration of inflammatory cells.

关 键 词：病理学与病理生理学 巨细胞病毒 动脉粥样硬化 趋化因子 基因敲除 

分 类 号：R363[医药卫生—病理学]