to investigate the possible role of proteases in endothelial cell invasiveness in vitro , bovine microvascular endothelial cells ( bmec ) grown on collagen gels were treated with phorbol myristate acetate ( pma ) , a tumor promoter that markedly increases their production of collagenase and plasminogen activator .
C0225336
endothelial
C0032144
plasminogen activator