广东地区汉族人MBL基因启动子区SNP的研究

目的 研究广东汉族人群甘露聚糖结合凝集素(MBL)基因启动子单核苷酸多态性(SNP)。方法 抽提人外周血白细胞基因组DNA，建立SSP-PCR及分子灯塔实时荧光PCR技术，检测MBL基因启动子区SNP位点-550(G／C，称H／L等位基因)、-220(G／C，X／Y等位基因)和 4(C/T，P／Q等位基因)，分析其单倍型及基因型频率。结果 从167人中检出等位基因型LYP／LYP10例(5．9％)、HYP／LYQ7例(4．2％)、LYP／LYQ94例(56．3％)、LXP／LXP6例(3．6％)、LYQ／LYQ4例(2．4％)、LXP／LYQ29例(17．4％)、HYP／LYP3例(1．8％)、HYP／LXP2例(1．2％)、HYP／HYP12例(7．2％)。结论 广东地区汉族人群MBL基因启动子区SNP等位基因型以LYP／LYQ和LXP／LYQ为主。

Investigation of single nucleotide polymorphisms in the promoter region of mannan-binding lectin gene in a Han population from Guangdong]

OBJECTIVE: To investigate the single nucleotide polymorphisms (SNP) in the promoter region of mannan-binding lectin (MBL) gene in a Han population in Guangdong Province. METHODS: A total of 167 blood samples were obtained from this Han population to isolate the genomic DNA from the leucocytes. The polymorphism alleles -550(G/C, named H/L alleles), -220(G/C, X/Y alleles) and +4(C/Tr, P/Q alleles) in the promoter region of MBL gene were detected by PCR with sequence-specific primers and molecular beacon real-time fluorescent PCR, and the frequencies of haplotypes and genotypes were analyzed. RESULTS: The frequencies of several genotypes in the 167 samples were: LYP/LYP, 10(5.9%); HYP/LYQ, 7(4.2%); LYP/LYQ, 94(56.3%); LXP/LXP, 6(3.6%); LYQ/LYQ, 4(2.4%); LXP/LYQ, 29(17.4%); HYP/LYP, 3(1.8%); HYP/LXP, 2(1.2%); HYP/HYP, 12(7.2%). CONCLUSION: The polymorphism genotypes in the promoter region of MBL gene in this chosen population are mostly LYP/LYQ and LXP/LYQ.