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Background  Preeclampsia is a frequent complication of pregnancy and a leading cause of perinatal mortality. Both genetic and environmental risk factors have been identified. Lipid metabolism, particularly cholesterol metabolism, is associated with this disease. Liver X receptors alpha (NR1H3, also known as LXRalpha) and beta (NR1H2, also known as LXRbeta) play a key role in lipid metabolism. They belong to the nuclear receptor superfamily and are activated by cholesterol derivatives. They have been implicated in preeclampsia because they modulate trophoblast invasion and regulate the expression of the endoglin (CD105) gene, a marker of preeclampsia. The aim of this study was to investigate associations between the  NR1H3  and  NR1H2  genes and preeclampsia.    Methods  We assessed associations between single nucleotide polymorphisms of  NR1H3  (rs2279238 and rs7120118) and  NR1H2  (rs35463555 and rs2695121) and the disease in 155 individuals with preeclampsia and 305 controls. Genotypes were determined by high-resolution melting analysis. We then used a logistic regression model to analyze the different alleles and genotypes for those polymorphisms as a function of case/control status.    Results  We found no association between  NR1H3  SNPs and the disease, but the  NR1H2  polymorphism rs2695121 was found to be strongly associated with preeclampsia (genotype C/C: adjusted odds ratio, 2.05; 95% CI, 1.04-4.05;  p  = 0.039 and genotype T/C: adjusted odds ratio, 1.85; 95% CI, 1.01-3.42;  p  = 0.049).    Conclusions  This study provides the first evidence of an association between the  NR1H2  gene and preeclampsia, adding to our understanding of the links between cholesterol metabolism and this disease.

A common polymorphism in NR1H2 (LXRbeta) is associated with preeclampsia