Effects of troglitazone and pioglitazone on cytokine-mediated endothelial cell proliferation in vitro
Gralinski, M.R.; Rowse, P.E.; Breider, M.A.
Journal of Cardiovascular Pharmacology 31(6): 909-913
1998
ISSN/ISBN: 0160-2446 PMID: 9641476 Document Number: 490785
We examined whether troglitazone and pioglitazone, antidiabetic thiazolidinediones, would directly induce endothelial cell proliferation or influence cytokine-driven proliferation in vitro. Monolayers of Balb/c mouse aortic endothelial cells were treated with troglitazone or pioglitazone in the absence of fetal bovine serum. Endothelial cells also were exposed to varying concentrations of basic fibroblast growth factor (bFGF) or insulin with or without either thiazolidinedione. After 48 h, 3-(4,5-dimethylthiozol-2-yl)-2,5 diphenyl tetrazolium bromide (MTT) assays were performed to quantitate endothelial cell proliferation by using the various treatment regimens. The data demonstrate that the antidiabetic thiazolidinediones troglitazone and pioglitazone negligibly affect direct endothelial cell proliferation in vitro. Furthermore, troglitazone and pioglitazone significantly inhibit bFGF-induced endothelial cell mitogenesis, whereas only high concentrations of troglitazone affect insulin-mediated proliferation.