HMG CoA Reductase Inhibitors Reduce Plasminogen Activator Inhibitor-1 Expression by Human Vascular Smooth Muscle and Endothelial Cells
Access StatusFull text of the requested work is not available in DASH at this time ("restricted access"). For more information on restricted deposits, see our FAQ.
MetadataShow full item record
CitationBourcier, Todd, and Peter Libby. 2000. “HMG CoA Reductase Inhibitors Reduce Plasminogen Activator Inhibitor-1 Expression by Human Vascular Smooth Muscle and Endothelial Cells.” Arteriosclerosis, Thrombosis, and Vascular Biology 20 (2) (February 1): 556–562. doi:10.1161/01.atv.20.2.556. http://dx.doi.org/10.1161/01.ATV.20.2.556.
AbstractThe clinical benefit of 3-hydroxy-3-methylglutaryl coenzyme A reductase inhibitors (statins) may derive from a qualitative, functional change in atherosclerotic lesions in addition to their lipid-lowering properties. We examined whether statins altered expression of the major determinants of fibrinolytic balance, plasminogen activator inhibitor-1 (PAI-1), and tissue-type plasminogen activator (tPA) in human vascular smooth muscle (SMC) and endothelial (EC) cells. Simvastatin reduced levels of PAI-1 antigen released from SMCs and ECs stimulated with platelet-derived growth factor or transforming growth factor-β (IC50 ≈1 μmol/L). Levels of EC-derived tPA increased 2-fold over the same concentrations of simvastatin that inhibited release of PAI-1. Simvastatin’s inhibitory effect was mimicked by C3 exoenzyme and prevented by geranylgeranyl pyrophosphate, but not by farnesyl pyrophosphate, suggesting the involvement of geranylgeranyl-modified intermediates. Decreased PAI-1 antigen was correlated with reduced mRNA transcription and activity of the PAI-1 promoter. By inhibiting expression of PAI-1 from SMCs and ECs while increasing expression of tPA from ECs, simvastatin may alter the local fibrinolytic balance within the vessel wall toward increased fibrinolytic capacity that, in turn, would reduce thrombotic risk after plaque rupture.
Citable link to this pagehttp://nrs.harvard.edu/urn-3:HUL.InstRepos:12760261
- HMS Scholarly Articles