Hypoxia induces FGF2 production by vascular endothelial cells and alters MMP9 and TIMP1 expression in extravillous trophoblasts and their invasiveness in a cocultured model.
The role of fibroblast growth factor 2 (FGF2) secretion by vascular endothelial cells during trophoblast invasion was assessed. The human extravillous trophoblast cell line, TEV-1, and umbilical vein endothelial cell line, HUVE-12, were cocultured under normal and hypoxic conditions. FGF2 expression in HUVE-12 cells and matrix metalloproteinase 9 (MMP9) and tissue inhibitor of metalloproteinase 1 (TIMP1) expression in TEV-1 cells were analyzed using quantitative RT-PCR and Western blot analyses. TEV-1 cell invasion was also examined. FGF2 expression in the HUVE-12 cells cocultured with TEV-1 cells was significantly increased under hypoxic conditions. In the TEV-1 cells cocultured with HUVE-12, hypoxia reduced MMP9 expression and increased TIMP1 expression; it also reduced cell invasion by 43%. However, the expression of MMP9 and TIMP1 and ratio of MMP9/TIMP1 were increased when the TEV-1 cells were cultured alone under hypoxic conditions. These findings suggest that FGF2 release by stressed endothelial cells of uterine spiral arteries play roles in decreasing MMP9 and increasing TIMP1 production in extravillous trophoblasts (EVT) in response to stress, resulting in reduced EVT invasion and possibly shallow implantation of the placenta.
Department of Obstetrics and Gynecology, Northern Jiangsu Province Hospital, Clinical Medical College, Yangzhou University, Jiangsu, China.
Jianying
J
Luo
Fuyuan
F
Qiao
Xianghua
X
Yin
D015687:Cell Hypoxia; D002460:Cell Line; D002461:Cell Line, Transformed; D054443:Cell Migration Assays; D018920:Coculture Techniques; D004730:Endothelium, Vascular / Q000378:metabolism*; D005260:Female; D016222:Fibroblast Growth Factor 2 / Q000235:genetics / Q000378:metabolism*; D005786:Gene Expression Regulation; D006801:Humans; D020780:Matrix Metalloproteinase 9 / Q000235:genetics / Q000378:metabolism*; D010929:Placentation; D011225:Pre-Eclampsia / Q000209:etiology; D011247:Pregnancy; D012333:RNA, Messenger / Q000378:metabolism; D020133:Reverse Transcriptase Polymerase Chain Reaction; D013315:Stress, Psychological / Q000378:metabolism / Q000503:physiopathology; D019715:Tissue Inhibitor of Metalloproteinase-1 / Q000235:genetics / Q000378:metabolism*; D057705:Transendothelial and Transepithelial Migration; D014327:Trophoblasts / Q000378:metabolism*
D012333:RNA, Messenger; D019715:Tissue Inhibitor of Metalloproteinase-1; D016222:Fibroblast Growth Factor 2; D020780:Matrix Metalloproteinase 9