郑州市汉族女性 MTHFR 和 MTRR 基因多态性分布

目的：探讨郑州市汉族女性5,10-亚甲基四氢叶酸还原酶(MTHFR)、甲硫氨酸合成酶还原酶(MTRR)基因 多态性的频率特征。方法：以郑州市1 253例汉族女性为研究对象，检测MTHFR C677T，A1298C和MTRR A66G的基 因分型。分析基因多态性的频率特征，并与已报道的其他地区汉族女性的数据进行比较。结果：郑州市汉族女性的 MTHFR 1298CC纯合突变基因型频率(1.3%)低于湘潭(4.8%)、延边(3.8%)、镇江(3.5%)、荆州(3.2%)、昆明(2.7%)、德 阳(6.3%)、惠州(7.2%)和乌鲁木齐(3.4%)等地(均P<0.05)，等位基因与烟台、延边、乌鲁木齐、镇江、荆州、昆明、德 州、湘潭、惠州等地差异有统计学意义(均P<0.05)。MTRR 66GG纯合突变基因型频率(5.4%)低于德阳(8.2%)(P<0.01)， 等位基因与德阳差异有统计学意义(P<0.05)。结论：郑州市汉族女性MTHFR A1298C和MTRR A66G基因多态性频率不 同于其他地区，具有地域特异性。

Geographical distribution of MTHFR and MTRR gene polymorphisms among the Han women in Zhengzhou city

Objective: To explore the genotype distribution of 5,10-methylenetetrahydrofolate reductase (MTHFR) and 5-methyltetrahydrofolate-homocysteine methyltransferase reductase (MTRR) among Chinese Han women in Zhengzhou. Methods: A total of 1 253 women were recruited from Zhengzhou city. Th e genotype of MTHFR C677T, A1298C and MTRR A66G was detected to analyze the distribution of gene polymorphisms and to compare them with the published data from other Han women. Results: The frequency of the MTHFR 1298CC genotypes (1.3%) in Zhengzhou was lower than that in Xiangtan (4.8%), Yanbian (3.8%), Zhenjiang (3.5%), Jingzhou (3.2%), Kunming (2.7%), Deyang(6.3%), Huizhou (7.2%) and Wulumuqi (3.4%) (all P<0.05). The difference in allele frequency was significant compared with that in Yantai, Yanbian, Wulumuqi, Zhenjiang, Jingzhou, Kunming, Dezhou, Xiangtan or Huizhou (all P<0.05). The frequency of the MTRR 66GG genotypes (5.4%) in Zhengzhou was lower than that in Deyang (8.2%) (P<0.01) and allele frequency between them was significant difference (P<0.05). Conclusion: The gene polymorphism of MTHFR A1298C and MTRR A66G among the Han women in Zhengzhou is statistically different from that in some regions of China.