The gene polymorphisms of eNOS and MTHFR modulates the development of preeclampsia in Han population.

We explored the effects of the endothelial nitric oxide synthase (eNOS) gene -786 T > C and 894 G > T locus polymorphisms and the methylenetetrahydrofolate reductase (MTHFR) gene 1298 A > C and 677 C > T locus polymorphisms on preeclampsia (PE) in pregnant women in Quanzhou area and provide reliable and stable predictors PE. This study included 160 normal pregnant women (normal control group) and 160 women with preeclampsia (PE group). Polymorphisms in eNOS gene and MTHFR were analyzed by the polymerase chain reaction/restriction fragment length polymorphism (PCR/RFLP) technique. eNOS 894 G > T locus and MTHFR 1298 A > C locus had no significant difference between the two groups. In the PE patients, eNOS -786 T allele (OR: 2.07,  = 0.03) and MTHFR 677 C allele (OR: 1.83,  = 0.04) had significantly lower frequency. The nitric oxide (NO) level in patients with eNOS -786 C C was significantly lower than that in those with -786 TT. The homocysteine (Hcy) level in patients with MTHFR 677 TT was significantly higher than that in those with 677 C C. In conclusion, the frequency of the eNOS -786 C C genotype and MTHFR 677 TT genotype are higher in women with PE, which cause lower NO level and higher Hcy level.