The etiology and pathophysiology of preeclampsia have not been clearly established; impaired immunologic adaptation and genetic incompatibility seem to be involved in deficient trophoblastic implantation. Placental hypoxia and endothelial dysfunction may lead to preeclampsia through an exacerbated systemic inflammatory reaction. Increased placental expression and secretion of soluble fms-like tyrosine kinase 1 appear to play a central role in the pathogenesis of preeclampsia. The soluble fms-like tyrosine kinase 1 antagonizes the proangiogenic biologic activity of circulating vascular endothelial growth factor and placental growth factor, leading to a failure of nitric oxide signaling to smooth muscle The investigators will conduct a randomized, double-blind, placebo-controlled trial designed to evaluate the efficacy and safety of Esomeprazole alone or with Sildenafil Citrate in preterm pregnancies complicated by preeclampsia.
