Abstract
To assess the association between human epoxide hydrolase exon 3 and 4 polymorphisms and pre-eclampsia by carrying out a case-control study in Turkish women. DNA was extracted from peripheral blood leukocytes, and genotype distribution of exon 3 and exon 4 of epoxide hydrolase gene (EPHX) was carried out in 271 patients and 155 controls. There was no statistically significant difference in the distribution of genotypes between pre-eclampsia without HELLP and pre-eclampsia plus HELLP cases and controls for the exon 3 and 4 polymorphism of EPHX. However, we found a significant association between the predicted enzyme activity level and pre-eclampsia (P = 0.018). The distribution of subjects with predicted high, intermediate and low microsomal epoxide hydrolase enzyme (EPHX) activity were 23.2, 38.8 and 38% in cases and 12, 47.3 and 40.7% in controls, respectively. Although we could not find any association between genetic variability in exon 3 and 4 of EPHX and pre-eclampsia, genetic variability in these two exons jointly modifies the predicted enzyme activity and may be a risk factor for pre-eclampsia.
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