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Development, Vol 118, Issue 3 931-939, Copyright © 1993 by Company of Biologists
JOURNAL ARTICLES |
PG McGuire and SM Alexander
Department of Anatomy, University of New Mexico School of Medicine, Albuquerque 87131.
The expression of the serine protease urokinase is elevated during the epithelial-mesenchymal transformation of the endocardium in the developing avian heart. Elevated urokinase expression is associated with the migrating mesenchymal cells of the atrioventricular canal and bulbotruncus and not the myocardium. Treatment of isolated endocardial-derived mesenchymal cells with phosphatidyinositol-specific phospholipase C released urokinase and its receptor from the cell surface and caused significant alterations in cell morphology and motility. Likewise inhibition of urokinase synthesis by treatment of cells with antisense oligonucleotides also inhibited the migration and motility of the endocardial-derived cells. These results suggest an important role for this enzyme in cell-matrix interactions and cell migration during development.
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