Role of regulatory and angiogenic cytokines in invasion of trophoblastic cells

Abstract

Problem: Trophoblast invasion is a temporally and locally restricted process, which regulates implantation and oxygen arrival to the embryo through the dialog with spiral artery endothelium. Trophoblast factors with angiogenic potential are activated by hypoxia. Their capacities to induce proliferation, migration, and invasion of trophoblastic cells have been investigated. Method of study: The expression of interleukin (IL)-6, CD126, CD130, vascular endothelial growth factor (VEGF), and hypoxia inducible factor-1α (HIF-1α) has been silenced in JEG-3 choriocarcinoma cells by using siRNA. Silencing efficacy has been assessed by ELISA, PCR or Western blotting. Proliferation has been measured by flow cytometry, migration by a transwell assay, and invasion by a Matrigel assay. Results: Proliferation was significantly reduced by silencing of CD126 or CD130, migration by silencing of IL-6, VEGF, or HIF-1α, and invasion by silencing of IL-6 and HIF-1α. Conclusion: The expression of IL-6, VEGF, and HIF-1α in trophoblastic cells is involved in the control of trophoblast invasion and migration. © 2009 John Wiley & Sons A/S.