中国北方地区汉族人群MCP-1基因多态性与肺癌相关性研究

目的 探讨中国北方地区汉族人群单核细胞趋化因子蛋白-1(monocyte chemoattrac-tant protein 1,MCP-1)基因-2518位点多态性与肺癌的相关性.方法 应用聚合酶链反应-限制性片段长度多态性(polymerase chain reaction-restriction fragment length polymorphism,PCR-RFLP)的方法对中国北方地区汉族人群134例肺癌患者和82例正常对照进行MCP-1基因-2518位点基因多态性检测.结果 AA基因型和GG基因型频率在肺癌病人和对照组间差异有统计学意义.AA基因型患肺癌的相对风险度增加(OR=2.645,X~2=6.532,P=0.011),GG基因型患肺癌的相对风险度降低(OR=0.519,X~2=4.929,P=0.026).肺癌病人中非小细胞肺癌患者AA基因型和GG基因型频率在病人和对照组间差异有统计学意义,AA基因型患病的相对风险度增加(OR=3.138,X~2=8.905,P=0.003),GG基因型患病的相对风险度降低(OR=0.516,X~2=4.613,P=0.032).小细胞肺癌患者各基因型频率与对照组差异无统计学意义.结论 中国北方地区汉族人群MCP-1基因-2518位点多态性与非小细胞肺癌相关,与小细胞肺癌不相关.

Relationship between genetic polymorphism of MCP-1 and lung cancer in Han nationality of North China

Objective To study the relationship between monoeyte chemoattractant protein 1 (MCP-1)-2518A/G polymorphism and lung cancer in Han nationality of North China. Methods One hun-dred and thirty-four unrelated consecutive patients with lung cancer(112 with NSCLC, 22 with SCLC)and 82 healthy individuals were studied. The polymorphisms of MCP-1-2518A/G were detected with polymerase chain reaction-restriction fragment length polymorphism(PCR-RFLP). Results The distribution of AA, AG and GG genotypes of MCP-1-2518 was significantly different in lung cancer patients compared with controls (X~2=8. 486,P=0. 014). There was a significant increase in the frequency of the AA genotype (OR=2. 645, X~2=6. 532, P=0.011) and a significant decrease in the frequency of the GG genotype (OR=0.519, X~2=4.929, P=0. 026)in the lung cancer patients, compared with controls. In the NSCLC patients the fre-quency of the AA genotype was higher than controls(OR=3. 138, X~2=8. 905, P=0.003) and the frequency of the GG genotype was lower than controls(OR=0. 516 ,X~2=4. 613, P=0. 032). The frequencies of AA, AG and GG genotypes in SCLC patients and controls had no difference. Conclusion This preliminary study showed that MCP-1-2518A/G polymorphism was associated with NSCLC but not SCLC.