摘要目的 探讨C23基因的单核苷酸多态性与华南汉族成人支气管哮喘发病的相关性.方法 应用病例对照研究,收集2006年2月至2010年2年南方医院和广东医学院附属医院确诊的汉族成人哮喘患者484例为研究对象,同期健康查体者553名为对照,应用MassARRAY-IPLEX技术和基质辅助激光解吸电离飞行时间质谱平台(matrix-assisted laser desorption/ionization time of flight mass spectrometry,MALDI-TOF-MS)对C3基因的rs10402876和rs366510位点进行基因分型.结果 在华南汉族人群中rs10402876检测到GG、GC和CC 3种基因型,rs366510检测到GG、GT和TT 3种基因型,分型成功率为98.94%.与对照组相比,哮喘组rs10402876的基因型分布(χ2=0.346,P=0.841)和等位基因分布(χ2=0.101,P=0.751)差异均无统计学意义;而rs366510的基因型分布(χ2=9.759,P=0.008;Bonferroni校正法,P=0.016)和等位基因分布(χ2=5.294,P=0.021;Bonferroni校正法,P=0.042)差异均有统计学意义.与GG+GT基因型相比,rs366510的TT基因型显著增加哮喘发生的危险性(OR=1.471,95%CI:1.125～1.923).结论 C3基因rs366510位点单苷酸多态性可能与华南汉族成人哮喘易感性有关.

abstractsObjective To investigate the association between single nucleotide polymorphisms (SNPs) of the complement component 3 gene (C3) and adult asthma of Hans in southern China. Methods A casecontrol study was performed. Four hundred and eighty-four adult asthma patients diagnosed in Nanfang Hospital and Affiliated Hospital of Guangdong Medical College, and 553 healthy subjects were collected from 2006 to 2010 for the study. MassARRAY-IPLEX and matrix-assisted laser desorption/ionization time of flight mass spectrometry (MALDI-TOF-MS) techniques was used to determine the genotypes of the rs10402876 and rs366510 loci of C3 gene. Results Genotypes GG, GT and TT in the rs366510 locus, and genotypes GG, GT and TT in the rs10402876 locus were detected. A total of 98. 94 percent of samples were genotyped. There were no significant differences in genotype frequencies (χ2 =0. 346, P=0. 841 ) and allele frequencies (χ2 =0. 101,P=0. 751) of rs10402876 between the two groups. However, genotype and allele frequencies of the rs366510 locus were significantly different (χ2 = 9.759, P=0. 008, Bonferroni correction,P= 0. 016; χ2 = 5. 294, P= 0. 021, Bonferroni correction, P = 0. 042, respectively). Compared with genotypes GG+GT, genotype TT of rs366510 significantly increased the risk of asthma, with the odds ratio of 1. 471 (95 % confidence interval 1. 125-1. 923). Conclusion These results suggest that C3 gene could be associated with adult asthma of Han population in southern China.