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Relationship between Methylenetetrahydrofolate Reductase (C677T), Factor V Leiden (G1691A), Prothrombin Mutation (G20210A) and Severe Preeclampsia in a Brazilian Population

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http://www.scirp.org/journal/PaperInformation.aspx?PaperID=48153#.VEXyNFfHRK0

Objectives: To better understand the etiologic factors that can influence preeclampsia, we inves- tigated hereditary factors for thrombosis, FV Leiden, F II 20210A mutation and the polymorphism C677T of the MTHFR, as singly and as in association, in a group of women from Ceará state-Northeast Brazil with severe preeclampsia. Material and Methods: We conducted a case-control study. 101 cases of severe preeclampsia were recruited from School Maternity Assis Chateaubriand, a reference Maternity of State of Ceará, Brazil, from December 2009 to December 2010. For clinical correlations, women were interrogated about fetal low weight (less than2500 grams) and fetal loss in previous pregnancies. Low weight, fetal loss and necessity of neonatal intensive care unit (neonatal ICU) related to current pregnancy were registered. 245 healthy voluntary women were recruited from the blood bank donors to verify the frequency of FV Leiden, FII and MTHFR as a control group. The study was approved by the Committee on Ethics in Human Research of Maternidade Escola Assis Chateubriand and all individuals gave their informed consent to participate in the study. Standard veinipuncture, with EDTA as anticoagulant, was used to collect blood samples. Genomic DNA was extracted, soon after, using a salting out method. Agarose gel electrophoresis with ethidium bromide staining was performed to ensure the quality of DNA extraction. Results: The frequencies of FV Leiden and FII mutation carrier were 0.99% (1/101) for both factors in the preeclampsia patients and 1.86% (4/214) and 0.93% (2/214), respectively, in control group. All mutates were heterozygous and concomitance of both mutations was not found. The genotype distribution of the MTHFR C677T in the patients and controls frequencies was in Hardy-Weinberg equilibrium (p ≤ 0.05). No statistical difference was observed between cases and controls in MTHFR genotypes or alleles. Conclusions: The FV Leiden, FII G20210A mutation and MTHFR C677T were not risks for preeclampsia development. FV Leiden and FII G20210A mutations had low frequency in the population studied, which may justify the absence of association.
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Freire, T. , Holanda, G. , Costa, D. , Sampaio, Z. , Feitosa, F. and Rabenhorst, S. (2014) Relationship between Methylenetetrahydrofolate Reductase (C677T), Factor V Leiden (G1691A), Prothrombin Mutation (G20210A) and Severe Preeclampsia in a Brazilian Population. Open Journal of Obstetrics and Gynecology, 4, 628-635. doi: 10.4236/ojog.2014.410087. 
 

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