title: Expression and regulation of vascular endothelial growth factor in a first trimester trophoblast cell line.
abstract: Embryo implantation and development are critically dependent upon the spatial and temporal regulation of angiogenesis and localized vascular permeability. A key mediator of these effects is the endothelial cell mitogen vascular endothelial growth factor (VEGF). VEGF has been shown to promote endometrial vascular permeability, fetal vasculogenesis and placental, fetal and maternal angiogenesis. However, the mechanism through which this regulation occurs in the placenta is poorly understood. This study was conducted to determine if the pro-angiogenic cytokines, TNF-alpha and TGF-beta1, affect VEGF expression in human first trimester trophoblasts. Culture of a first trimester trophoblast cell line (HTR-8/SVneo), in the presence of either TNF-alpha or TGF-beta1, resulted in the expression of significant levels of VEGF in culture. The trophoblast cell line also showed a time-dependent and a dose-dependent increase in VEGF mRNA levels when cultured in the presence of either TNF-alpha or TGF-beta1. These results suggest that both TNF-alpha and TGF-beta1 may regulate the production of VEGF in early gestational trophoblasts and may therefore serve to modulate placental vascular permeability and angiogenesis that are necessary for embryo implantation and placentation.
authors.affiliation: Department of Obstetrics and Gynecology, Wayne State University School of Medicine, Detroit, MI 48201, USA.
authors.forename: I B
authors.initials: IB
authors.lastname: Chung
authors.forename: F D
authors.initials: FD
authors.lastname: Yelian
authors.forename: F M
authors.initials: FM
authors.lastname: Zaher
authors.forename: B
authors.initials: B
authors.lastname: Gonik
authors.forename: M I
authors.initials: MI
authors.lastname: Evans
authors.forename: M P
authors.initials: MP
authors.lastname: Diamond
authors.forename: D M
authors.initials: DM
authors.lastname: Svinarich
mesh_terms: D000328:Adult; D015152:Blotting, Northern; D002461:Cell Line, Transformed; D016228:Endothelial Growth Factors / Q000235:genetics*; D004797:Enzyme-Linked Immunosorbent Assay; D005260:Female; D005786:Gene Expression Regulation; D006801:Humans; D008222:Lymphokines / Q000235:genetics*; D015345:Oligonucleotide Probes / Q000737:chemistry; D011247:Pregnancy; D011261:Pregnancy Trimester, First; D012313:RNA / Q000032:analysis; D012333:RNA, Messenger / Q000096:biosynthesis*; D016212:Transforming Growth Factor beta / Q000494:pharmacology; D014327:Trophoblasts / Q000166:cytology / Q000187:drug effects / Q000378:metabolism*; D014409:Tumor Necrosis Factor-alpha / Q000494:pharmacology; D042461:Vascular Endothelial Growth Factor A; D042442:Vascular Endothelial Growth Factors
chemical_list: D016228:Endothelial Growth Factors; D008222:Lymphokines; D015345:Oligonucleotide Probes; D012333:RNA, Messenger; D016212:Transforming Growth Factor beta; D014409:Tumor Necrosis Factor-alpha; D042461:Vascular Endothelial Growth Factor A; D042442:Vascular Endothelial Growth Factors; D012313:RNA