RESUMO
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. The 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.