PMID: 9450789Feb 5, 1998Paper

Regulation of the uPAR/uPA system expressed on monocytes by the deactivating cytokines, IL-4, IL-10 and IL-13: consequences on cell adhesion to vitronectin and fibrinogen

British Journal of Haematology
J PaysantC Soria

Abstract

Urokinase (uPA) and its receptor (uPAR) have been proposed to be involved in monocyte migration by inducing degradation of matrix proteins. In addition, uPAR is also implicated in cell adhesion to the vascular wall. The adhesive function of uPAR depends on a direct interaction with vitronectin which is increased by uPA and by modification of cell surface integrin (such as CD11b-CD18) when associated to uPAR. In this study we analysed the role of three deactivating cytokines, IL-4, IL-10 and IL-13, on the surface expression of uPA, uPAR and CD11b by monocytes and their consequences on monocyte adhesion to immobilized fibrinogen and vitronectin. IL-10 induced a decrease in uPA and CD11b after 18 h incubation and a delayed decrease in uPAR which was only significant after 48 h incubation. These results may explain the decrease in monocyte adhesion, which was observed after an 18 h incubation with IL-10, on immobilized vitronectin and fibrinogen. In contrast, IL-4 and IL-13 induced a decrease in uPAR after 18 h and a significant increase in uPA both in the cell lysates and at the cell surface, as well as an increase in cell surface associated CD11b. These cytokines did not modify cell adhesiveness to vitronectin or fibrinogen despi...Continue Reading

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Citations

Mar 24, 2005·International Urology and Nephrology·Attalla Farag El-KottAyman El-Meghawry El-Kenawy
Aug 23, 2001·Proceedings of the National Academy of Sciences of the United States of America·T S MahoneyG A Zimmerman
Feb 25, 2006·Arteriosclerosis, Thrombosis, and Vascular Biology·Koichi ShimizuPeter Libby
Jan 30, 2013·Blood Coagulation & Fibrinolysis : an International Journal in Haemostasis and Thrombosis·Iwona HusAnna Dmoszynska

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