YC-1 reduces placental sFlt-1 and soluble endoglin production and decreases endothelial dysfunction: A possible therapeutic for preeclampsia

Fiona C Brownfoot, Stephen Tong, Natalie J Hannan, Roxanne Hastie, Ping Cannon, Laura Tuohey, Tu'uhevaha J Kaitu'u-Lino
Molecular and Cellular Endocrinology 2015 September 15, 413: 202-8
Preeclampsia is a serious complication of pregnancy with no medical treatment. It is caused by intermittent placental hypoxia and release of sFlt-1 and soluble endoglin, leading to wide spread maternal endothelial dysfunction and multisystem organ injury. YC-1 is a guanylyl cyclase activator and HIF1α inhibitor developed for use in hypertension and atherosclerosis. We examined whether YC-1 reduces sFlt-1 and sENG secretion and reverses endothelial dysfunction in primary human tissues. YC-1 significantly reduced sFlt-1 and sENG secretion from human umbilical vein endothelial cells, purified primary trophoblast cells and placental explants taken from patients with preterm preeclampsia. This was concordant with reduced HIF1α expression. YC-1 also reversed TNFα induced endothelial dysfunction, including reduced vascular cell adhesion molecule 1 expression and monocyte adhesion to primary endothelial cells. We conclude YC-1 decreases placental production of sFlt-1 and sENG and decreases endothelial dysfunction. It is a novel therapeutic candidate for preeclampsia.

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