Receptor-mediated basic fibroblast growth factor signaling regulates cyclic pressure-induced human endothelial cell proliferation.
Vascular endothelial cells sense and respond to pressure by molecular mechanism(s) which, to date, remain poorly understood. The present study investigated basic fibroblast growth factor (bFGF) signaling as a putative mechanotransduction pathway involved in the proliferative responses of human umbilical vein endothelia cells (HUVECs) to 60/20 mm Hg cyclic pressure at 1 Hz for 24 h. Under these conditions, the enhanced proliferative response of these HUVECs was not associated with an increased synthesis/release of bFGF, but involved rapid (within 30 min from the onset of exposure to pressure) tyrosine phosphorylation of the bFGF receptor, FGFR-2. Furthermore, monoclonal antibodies to either bFGF or FGFR-2 attenuated the increased proliferation of HUVECs exposed to 60/20 mm Hg cyclic pressure. HUVECs proliferation under 60/20 mm Hg at 1 Hz cyclic pressure is, therefore, dependent upon bFGF and involves FGFR-2 activation.
Shin
Hainsworth Y
HY
Department of Biomedical Engineering, Rensselaer Polytechnic Institute, Troy, New York 12180-3590, USA.
Schwartz
Eric A
EA
Bizios
Rena
R
Gerritsen
Mary E
ME
D000911:Antibodies, Monoclonal / Q000276:immunology; D002455:Cell Division / Q000502:physiology*; D042783:Endothelial Cells / Q000166:cytology / Q000502:physiology*; D004730:Endothelium, Vascular / Q000502:physiology; D016222:Fibroblast Growth Factor 2 / Q000276:immunology / Q000502:physiology*; D006801:Humans; D010766:Phosphorylation; D017468:Receptors, Fibroblast Growth Factor / Q000276:immunology / Q000502:physiology*; D015398:Signal Transduction / Q000502:physiology*; D014443:Tyrosine / Q000378:metabolism
D000911:Antibodies, Monoclonal; D017468:Receptors, Fibroblast Growth Factor; D016222:Fibroblast Growth Factor 2; D014443:Tyrosine