Rosiglitazone antagonizes vascular endothelial growth factor signaling and nuclear factor of activated T cells activation in cardiac valve endothelium. Endothelium 2006;13(3):181-90
Date
07/15/2006Pubmed ID
16840174DOI
10.1080/10623320600760308Scopus ID
2-s2.0-33746379872 (requires institutional sign-in at Scopus site) 7 CitationsAbstract
Nuclear factor of activated T cells, Cytoplasmic 1 (NFATc1) is required for heart valve formation. Vascular endothelial growth factor (VEGF) signaling, mediated by NFATc1 activation, positively regulates growth of valvular endothelial cells. However, regulators of VEGF/NFATc1 signaling in valve endothelium are poorly understood. Peroxisome proliferator-activated receptor gamma (PPARgamma) inhibits NFATc1 activity in T cells and cardiomyocytes, but it is not known if PPARgamma controls NFATc1 function in endothelial cells. The authors hypothesize PPARgamma antagonizes VEGF signaling in valve endothelium by inhibiting NFATc1. Endothelial cells isolated from human valve leaflet tissue were shown by immunocytochemistry to express the endothelial-specific markers von Willebrand factor (vWF) and platelet endothelial cell adhesion molecule (PECAM)-1. VEGF-induced proliferation and migration of human pulmonary valve endothelial cells (HPVECs) were inhibited by rosiglitazone (ROSI), a specific ligand of PPARgamma activation, suggesting that PPARgamma disrupts VEGF signaling in the valve endothelium. ROSI also antagonized VEGF-mediated NFATc1 nuclear translocation in HPVECs, suggesting that PPARgamma inhibits VEGF signaling of NFATc1 activation in the valve. The effect of ROSI on nonvalve human umbilical vein endothelial cells (HUVECs) was tested in parallel and a similar inhibition of NFATc1 activation was observed. These data provide the first demonstration that ROSI negatively regulates VEGF signaling in the valve endothelium by a mechanism involving NFATc1 activation and nuclear translocation.
Author List
Sander TL, Noll L, Klinkner DB, Weihrauch D, He BJ, Kaul S, Zangwill SD, Tweddell JS, Pritchard KA Jr, Oldham KTAuthors
Keith Oldham MD Emeritus Professor in the Surgery department at Medical College of WisconsinKirkwood A. Pritchard PhD Professor in the Surgery department at Medical College of Wisconsin
MESH terms used to index this publication - Major topics in bold
Active Transport, Cell NucleusCell Culture Techniques
Cell Movement
Cell Nucleus
Cell Separation
Child
Endothelial Cells
Fibroblast Growth Factors
Heart Valves
Humans
NFATC Transcription Factors
PPAR gamma
Signal Transduction
Thiazolidinediones
Vascular Endothelial Growth Factor A
