Inhibition of matrix metalloproteinase 2 maturation and HT1080 invasiveness by a synthetic furin inhibitor

FEBS Letters
E MaquoiJ M Foidart

Abstract

The close correlation observed between matrix metalloproteinase 2 (MMP-2) activation and metastatic progression in various tumors suggests that MMP-2 is a 'master switch' triggering tumor spread. Recently, membrane type 1 MMP (MT1-MMP) was identified as a potential physiological activator of MMP-2. Like all other MMPs, MT1-MMP possesses a pro-domain which must be removed for the enzyme to acquire its catalytic potential. The presence of a typical recognition motif (RXKR) for the furin-like convertases at the end of its pro-domain suggests a potential role for these proteinases in MT1-MMP processing. In order to evaluate the implication of furin in pro-MT1-MMP processing, we treated HT1080 cells with a synthetic furin inhibitor and monitored their ability to activate pro-MMP-2 as well as their invasive potential. Our results demonstrated that the furin inhibitor decreased pro-MT1-MMP processing as well as pro-MMP-2 activation and cell invasiveness. Therefore, our data bring further evidence that furin is a key factor in the maturation of MMPs associated with the invasive and metastatic potential of tumor cells.

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