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作 者:张小娟[1] 任满意[1] 曹晓青[1] 张春盛[1] 刘同宝[1]
机构地区:[1]山东大学医学院山东省胸科医院心内科,山东省济南市250014
出 处:《中国循环杂志》2014年第4期300-303,共4页Chinese Circulation Journal
摘 要:目的:探讨趋化因子受体6(CCR6)基因敲除对ApoE基因敲除(ApoE-/-)小鼠主动脉粥样硬化斑块形成的影响及其作用机制。方法:杂交培育CCR6基因敲除(CCR6-/-)ApoE-/-小鼠20只作为实验组,普通CCR6+/+ApoE-/-小鼠20只作为对照组,给予高脂饮食。12周后将小鼠处死进行取材固定,主动脉根部冰冻切片进行苏木素伊红(HE)染色、油红O染色及巨噬细胞和单核细胞趋化蛋白1(MCP-1)的免疫组化染色,对斑块的形态、面积及组成进行观测。并培育巨噬细胞,进行了噻唑蓝比色实验及细胞迁移实验,对机制进一步分析。结果:实验组与对照组相比斑块面积显著减小[(8.3±1.9)%vs(16.1±2.0)%,P<0.05];实验组与对照组相比主动脉根部脂质沉积[(14.4±2.1)%vs(28.5±3.4)%]及主动脉大体脂质沉积[(4.9±2.8)%vs(13.6±3.2)%]均提示实验组脂质沉积显著减小(P<0.05);实验组与对照组相比斑块内巨噬细胞[(18.9±2.8)%vs(35.7±4.5)%]及MCP-1表达减少[(16.3±2.2)%vs(23.1±5.6)%]。差异均有统计学意义(P<0.05)。结论:CCR6通过影响脂质沉积、巨噬细胞增殖迁移促进动脉粥样硬化的形成。Objective: To explore the effect of chemokine receptor 6 (CCR6) on atherosclerosis plaque formation in ApoE-/- mice. Methods: Our research included 2 groups, Experimental group, n=20 CCR6-/- ApoE-/- mice and Control group, n=20 CCR6+/+ApoE-/- mice. Both groups received high-fat diet for 12 weeks, and then, the aortic roots were collected for HE staining, the monocyte chemoattractant protein-1 (MCP-1) in macrophages for immune-histochemisty staining, the macrophages were cultured for migration study, and the results were compared between 2 groups. Results: The plaque areas in Experimental group was significantly smaller than those in Control group, (8.3±1.9) % vs (16.1±2.0) %, P〈0.05. The Experimental group had less lipid deposition in aortic root, (14.4±2.1) % v s (28.5±3.4) %, and less lipid deposition in aorta (4.9±2.8) % vs (13.6±3.2) %, all P〈0.05. The Experimental group showed less macrophages and lower MCP-1 expression in plaques, (18.9±2.8) % vs (35.7±4.5) % and (16.3±2.2) % vs (23.1±5.6) %, all P〈0.05. Conclusion: CCR6 promotes atherogenesis plaque formation by lipid deposition and macrophage migration in ApoE-/- mice.
关 键 词:动脉粥样硬化 趋化因子受体6 巨噬细胞 单核细胞趋化蛋白1
分 类 号:R541[医药卫生—心血管疾病]
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