中文摘要：

目的：探讨趋化因子CX3CL1与冠心病合并2型糖尿病发病的相关关系。方法：采用病例-对照的研究方法,收集冠心病合并2型糖尿病患者400例,收集对照组400例,利用免疫组化检测冠心病合并2型糖尿病患者颈外动脉旋切术后斑块组织中CX3CL1表达水平,分别检测上述2组不同人群血清中的CX3CL1表达水平,同时采用直接测序方法检测CX3CL1基因rs170364位点基因型及等位基因的分布频率在对照组和冠心病合并2型糖尿病人群的分布差异。结果：冠心病合并2型糖尿病患者颈外动脉斑块组织中CX3CL1表达明显增高,冠心病合并2型糖尿病患者血清中CX3CL1的表达水平明显高于对照人群中CX3CL1的表达。CX3CL1基因rs170364单核苷酸多态位点的三种基因型分布频率（GG型,GT型和TT型）在冠心病合并2型糖尿病患者的分布频率为42.7%,40.0%和17.2%,在对照组分布频率为50.2%,39.6%和10.2%,CX3CL1基因rs170364位点T等位基因是冠心病合并2型糖尿病发病的一个独立危险因素（P〈0.05）。Logistic回归校正性别、年龄、体重指数、吸烟、高血压、高脂血症等冠心病合并2型糖尿病的易患因素后,CX3CL1基因rs170364 T等位基因仍是冠心病合并2型糖尿病发病的一个独立的危险因素。结论：CX3CL1在冠心病合并2型糖尿病的患者血清和颈外动脉动脉血管组织中表达明显增高,CX3CL1基因rs170364T等位基因可能是冠心病合并2型糖尿病患者发病的独立危险因素。

英文摘要：

Objective： CX3CL1 played an important role in atherosclerosis recently. We investigated the association between the chemokine CX3CL1 with coronary artery disease in type 2 diabetes mellitus. Methods： CX3CL1 expression in carotid artery specimens was analysed by immunohistochemistry. The study was conducted in 400 coronary artery disease in type 2 diabetes mellitus and 400 control subjects in a case-control study.CX3CL1 gene rs170364 variant was detected by the directing sequencing technology. Results：CX3CL1 expressions were increased markedly in carotid artery plaque than in normal carotid artery. CX3CL1 gene rs170364 genotype（GG,GT and TT） frequency in coronary artery disease in type 2 diabetes mellitus is 42.7%, 40.0% and 17.2%, and 50.2%, 39.6% and10.2% in the control group. CX3CL1 gene rs170364 variant is a genetic risk factor for coronary artery disease in type 2 diabetes mellitus（P〈0.05）. Logistic regression analysis with adjustments for other risk factors showed that the CX3CL1 gene rs170364 T allele significantly increases the risk of coronary artery disease in type 2 diabetes mellitus compared with the control subjects（P〈0.05）.Conclusion： Our study shows that the CX3CL1 expression increased in the carotid plaques and serum of the coronary artery disease in type 2 diabetes mellitus.CX3CL1 gene rs170364 variant may be considered a genetic risk factor for coronary artery disease in type 2diabetes mellitus.