Williams MA, Sanchez SE, Zhang C, Bazul V. Methylenetetrahydrofolate reductase677 C→T polymorphism and plasma folate in relation to pre-eclampsia risk among Peruvian women.
J Matern Fetal Neonatal Med 2010;
15:337-44. [PMID:
15280126 DOI:
10.1080/14767050410001680037]
[Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
OBJECTIVES
Pre-eclampsia is an important cause of maternal and fetal morbidity and mortality worldwide. Hyperhomocyst(e)inemia in pregnancy is associated with an increased risk of pre-eclampsia in most studies. Nutritional and genetic factors regulate homocyst(e)ine levels. A missense mutation 677 C-->T in the gene for methylenetetrahydrofolate reductase (MTHFR) has been associated with an increased pre-eclampsia risk in some, although not most, previously studied populations.
METHODS
To further understand the role of this polymorphism in the etiology of pre-eclampsia, we genotyped a total of 125 pre-eclamptics and 179 normotensive pregnant Peruvian women.
RESULTS
The wild-type allele frequency among cases and controls was 54% and 58%, respectively. Twenty percent of cases and 17% of controls were homozygous for the 677 C-->T MTHFR genotype (T/T). After adjustment for confounding by covariates including maternal age, nulliparity, pre-pregnancy body mass index and use of prenatal vitamins, women homozygous for the 677 C-->T MTHFR genotype (T/T) experienced a modest, statistically non-significant increased risk of pre-eclampsia (adjusted OR 1.6, 95% CI 0.7, 3.8). Maternal folate deficiency was associated with a statistically non-significant doubling in risk of pre-eclampsia in this population (adjusted OR 2.0, 95% CI 0.9, 4.3).
CONCLUSIONS
There was no evidence to suggest that pre-eclampsia risk is positively associated with the T/T genotype overall, or in the context of folate deficiency.
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