Abstract
We studied the effect of urokinase, its recombinant forms, and domain fragments on migration and proliferation of adipose tissue mesenchymal stromal cells (MSCs) and MMP secretion by these cells. Urokinase, but not its recombinant forms, slightly induced directed migration of MSCs. Spontaneous migration of MSCs increased under the action of urokinase or its isolated kringle domain. Migration induced by platelet-derived growth factor was inhibited by proteolytically inactive form of urokinase, the kringle domain, and blocking antibody to urokinase receptor. Urokinase, its proteolytically inactive form, and kringle domain produced no effect on MSC proliferation. In contrast to platelet-derived growth factor, all urokinase forms induced secretion of MMP-9 by MSCs.
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