Increased plasminogen activator inhibitor type 1 in coronary artery atherectomy specimens from type 2 diabetic compared with nondiabetic patients: a potential factor predisposing to thrombosis and its persistence

Circulation
B E SobelH Gold

Abstract

Inhibition of fibrinolysis attributable to elevated concentrations of plasminogen activator inhibitor type 1 (PAI-1) in blood is associated with insulin resistance, hyperinsulinemia, and type 2 diabetes mellitus. Because we have shown that insulin can stimulate PAI-1 synthesis in vivo and because accelerated vascular disease is common in such patients as well, we hypothesized that increased PAI-1, potentially predisposing to thrombosis, acute occlusion, and accelerating atherosclerosis because of thrombus-associated mitogens, would be present in excess in atheroma from type 2 diabetic subjects. Samples acquired by directional coronary atherectomy from 25 patients with type 2 diabetes and 18 patients without diabetes were characterized qualitatively histologically for cellularity and by immunohistochemistry visually and qualitatively and by quantitative image analysis for assessment of urokinase-type plasminogen activator (u-PA) and PAI-1. Patients with and without diabetes were similar with respect to demographic features and the distribution and severity of coronary artery disease. Substantially more PAI-1 and substantially less u-PA were present in the atherectomy samples from subjects with diabetes. The disproportionate elev...Continue Reading

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Citations

Jun 20, 2007·Histochemistry and Cell Biology·A K M Tarikuz ZamanBurton E Sobel
Feb 2, 2002·Current Atherosclerosis Reports·Elaine Chiquette, Robert Chilton
Mar 5, 2004·American Heart Journal·Kristina DunderHans Lithell
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