cPAF triggered significantly increased MT1-MMP, MMP-2, MMP-9, and TIMP-2 mRNA expression, followed by increased active MT1-MMP protein expression at 12 hours, whereas TIMP-2 protein increased at 24 hours. PAF also induced furin gene expression, followed by increased protein expression. Nona-D-arg-NH(2) blocked cPAF induction of MT1-MMP activity. PAF-treated myofibroblasts showed increased active MMP-9 protein, but unchanged MMP-2 activity. Pretreatment with BN 50730 blocked PAF-induced transcription and translation of these proteins.