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Changes of expression and function of CXCR4 residing on the membrane of endothelial progentior cells in patients with acute myocardial infarction
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- Author:
- No author available
- Journal Title:
- CHINESE JOURNAL OF EMERGENCY MEDICINE
- Issue:
- 4
- DOI:
- 10.3760/j.issn:1671-0282.2007.04.004
- Key Word:
- 心肌梗死;内皮祖细胞;CXCR4
Abstract： 目的 观察急性心肌梗死(acute myocardial infarction,AMI)患者外周血来源内皮祖细胞(endothelial progentior cells,EPCs)CXCR4受体表达及功能的变化.方法 选择AMI患者15例,对照组非AMI患者15例,抽取外周血密度梯度离心法获取单个核细胞,培养7 d后对贴壁的细胞进行分析.激光共聚焦显微镜鉴定FITC标记荆豆凝集素Ⅰ和DiI标记的乙酰化低密度脂蛋白双染色阳性细胞为EPCs.应用改良的Boyden小室测定EPCs对基质细胞衍生因子-1(stromal cell-derived factor-1,SDF-1)的迁移能力,流式细胞仪测定EPCs的CXCR4的表达,RT-PCR法测CXCR4的mRNA表达.结果 AMI患者外周血EPCs数目增多,对SDF-1的迁移能力增强,其表达CXCR4上调,CXCR4的mRNA合成增强.与对照组相比,差异均具有统计学意义(P＜0.01).结论 AMI患者外周血来源EPCs的CXCR4受体表达上调,功能增强.
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