湖北汉族变应性哮喘患者GPR154基因单倍型分析

目的探讨G蛋白偶联受体154(Gprotein-coupled receptor154,GPR154)基因多态性与湖北汉族变应性哮喘易感性间的关系。方法用聚合酶链反应和限制性片段长度多态性对145例变应性哮喘患者和120名健康人群GPR154基因的SNP563704和SNP522363位点的多态性进行分析。结果(1)变应性哮喘患者SNP563704 CC、CT和TT基因型频率是0.324、0.524和0.152;与对照组相比差异无统计学意义(χ2=1·880,P>0.05);变应性哮喘组不同基因型间血清总IgE水平差异无统计学意义(F=0.714,P>0.05)。(2)变应性哮喘患者SNP522363CC、CG和GG基因型频率是0.289、0.521和0.190;与对照组相比差异无统计学意义(χ2=0.700,P>0.05);变应性哮喘组不同基因型间血清总IgE水平差异无统计学意义(F=0·083,P>0.05)。(3)对SNP522363和SNP563704进行单倍型分析,4种频率大于0.03的单倍型在哮喘组和对照组间差异有统计学意义(χ2=16.50,P<0.01)。哮喘组CT和GT单倍型频率显著高于对照组,差异有统计学意义(P=0.015;P=0.002)。结论湖北汉族变应性哮喘易感性与单个的单核甘酸多态性无关,但与SNP522363和SNP563704组成的单倍型显著相关。

Study on the association of single nucleotide polymorphisms and haplotypes of GPR154 gene with allergic asthma in Han nationality in Hubei Chinese population

OBJECTIVE: To investigate whether two polymorphism sites of the G protein-coupled receptor 154 gene (GPR154) are associated with asthma in Han nationality of Hubei province in China. METHODS: The polymorphisms were detected by polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) in 145 cases of allergic asthma and 120 healthy controls. RESULTS: (1)The genotype frequencies of SNP563704 were 0.324 for CC, 0.524 for CT, 0.152 for TT in allergic asthma patients in a Chinese population. The genotype frequencies of SNP522363 were 0.289 for CC, 0.521 for CG, 0.190 for GG in allergic asthma patients in a Chinese population. (2)No significant differences in the distributions of SNP563704 and SNP522363 polymorphisms were found between allergic asthma and healthy control subjects (chi square is 1.880, P> 0.05; chi square is 0.700, P> 0.05, respectively). (3)No significant difference in serum total IgE was found between patients with allergic asthma with different genotypes of SNP563704 and SNP522363 (F is 0.714, P> 0.05; F is 0.083, P> 0.05, respectively). (4) The distribution of frequencies of 4 haplotypes showed significant difference(chi square is 16.50,P< 0.01). The haplotype frequencies of CT and GT were remarkably higher in asthma subjects than those in controls. CONCLUSION: The polymorphisms of SNP563704 and SNP522363 are not associated with allergic asthma in Han nationality in Hubei Chinese population. However, the haplotypes are associated with allergic asthma.