Polymorphisms of MTHFR and MTRR among the Han women in Laiwu city of Shandong Province

Objective To explore the 5,10-methylenetetrahydrofolate reductase（ MTHFR） and 5-methyltet-rahydrofolate-homocysteine methyltransferase reductase（ MTRR） gene polymorphisms among the Han women in Laiwu City.Methods A total of 559 Han women were recruited.And their oral epithelial cells were collected to extract genome DNA in order to detect gene polymorphisms of MTHFR and MTRR using fluorescence quantitative PCR.Then the results were compared with those in other cities in China.Results The frequency of MTHFR 677CC,677CT and 677TT of Han women in Laiwu city was 14.3%,46.7%and 38.1%,respectively.The frequency of MTHFR 677TT among Laiwu women was significantly different to those of Zhenjiang, Wuhan, Kunming, Deyang, Huizhou, Qionghai （P〈0.05）.The frequency of AA,AC,CC gene type on MTHFR A1298C was 78.2%,19.7% and 2.1%,respec-tively, the frequency was significantly different to those of Zhenjiang, Wuhan, Kunming, Deyang, Huizhou, Qionghai （P〈0.05）.The frequency of AA,AG,GG gene type on MTRR A66G was 53.3%,38.8%and 7.9%,respectively. The frequency of MTRR 66GG was significantly different to that of Qionghai（P〈0.05）.Conclusion The MTHFR, MTRR polymorphism distribution of Han women in Laiwu City has the characteristic of region specificity,respectively. Key words: 5; 10-methylenetetrahydrofolate reductase 5-methyltetrahydrofolate-homocysteine methyltrans-ferase reductase Single nucleotide polymorphism