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Keratinocyte Growth Factor Stimulation of Gelatinase (Matrix Metalloproteinase-9) and Plasminogen Activator in Histiotypic Epithelial Cell Culture

1995; Elsevier BV; Volume: 104; Issue: 6 Linguagem: Inglês

10.1111/1523-1747.ep12606233

1523-1747

Edward E. Putnins, James D. Firth, Veli-Jukka Uitto,

Blood Coagulation and Thrombosis Mechanisms

The purpose of this investigation was to examine the role that keratinocyte growth factor (KGF) plays in the control of matrix-degrading protease activity in epithelial cells. The culture conditions had a significant effect on cellular responses to the growth factor. In histiotypic culture on porous-polycarbonate membranes, porcine periodontal ligament epithelial cells responded to KGF with increased 92-kDa gelatinase (matrix metalloproteinase [MMP]-9) activity. No such response was observed in cells maintained on plastic plates. Epidermal growth factor and platelet-derived growth factor also increased MMP-9 activity in the histiotypic cultures of epithelial cells. Addition of heparin with KGF produced a further increase in MMP-9 activity, with heparin alone having no effect. Precoating of polycarbonate membranes with matrix components showed that fibronectin and an engineered poly-RGD molecule substrate were required for KGF plus heparin to increase MMP-9 activity. Precoating plastic culture plates with the same proteins did not generate the same response. Concomitant with gelatinase activity, KGF also increased urokinase-type plasminogen activator in the epithelial cells. Thus, KGF appears to be an important regulator of protease secretion in epithelial cells.