Targeting zymogen activation to control the matriptase-prostasin proteolytic cascade

Area of Science:

• Biochemistry
• Molecular Biology
• Drug Discovery

Background:

• Matriptase, a membrane-associated serine protease, is linked to various human diseases.
• Its role in disease pathogenesis makes it a potential therapeutic drug target.

Purpose of the Study:

• To develop a novel class of inhibitors targeting matriptase zymogen activation.
• To identify compounds that can effectively inhibit matriptase activation and its downstream effects.

Main Methods:

• Screening of a compound library using a cell-based matriptase activation assay.
• Computer-aided search for commercially available analogues of a selected compound.
• Testing inhibitors in both intact-cell and cell-free systems.

Main Results:

• Four structurally related compounds were identified that inhibit matriptase activation at low micromolar concentrations.
• These inhibitors target the autoactivation machinery, not intracellular signaling pathways.
• The identified inhibitors also blocked prostasin activation, a downstream event.
• A known catalytic inhibitor (CVS-3983) did not inhibit matriptase activation.

Conclusions:

• Inhibiting matriptase activation is an effective strategy for controlling its function.
• The developed inhibitors represent a promising new approach for therapeutic intervention in matriptase-related diseases.