G1691A MUTATION OF  F5 GENE AND PREECLAMPSIA
Background:G1691A mutation of F5 gene is a risk factor of thrombosis and endothelial dysfunction causing preeclampsia (PE). This study aimed to (1) determine the rate of 1691GG, 1691GA and 1691AA genotypes of F5 gene in preeclamptic and normotensive pregnant women, and (2) survey the association between G1691A mutation of F5 gene and preeclampsia. Patients and methods: 73 preeclamptic pregnant women and 292 normotensive pregnant women were determined G1691A genotypes of F5 gene by PCR-RFLP in with DNA samples extracted from peripheral blood lymphocytes. Results:100% normotensive pregnant women were 1691GG genotype. In the group of preeclamptic pregnant women, the rate of 1691GA genotype and 1691GG were 4.1% and 95.9%, respectively. G1691A mutation was a risk factor of preeclampsia, with OR = 29.04, 95%CI = 1.48-558.72. The rate of G1691A mutation carriers in mild PE group was 0%, in severe PE was 7.7% and in eclampsia was 100%. Conclusion:There was the association between G1691A mutation and the development and severity of preeclampsia. Keywords: Preeclampsia, G1691A mutation, factor V Leiden, F5 gene.