New strategies for targeting matrix metalloproteinases

Area of Science:

• Biochemistry
• Pharmacology
• Drug Discovery

Background:

• Matrix metalloproteinase (MMP) inhibitor development faces challenges due to poor specificity and off-target effects.
• Exosite targeting offers a strategy to enhance inhibitor selectivity within the MMP family.

Purpose of the Study:

• To review recent advances in designing specific MMP inhibitors by targeting exosites.
• To highlight various molecular approaches and their success in achieving selectivity.

Main Methods:

• Exploration of small molecules and peptides binding to MMP exosites (e.g., catalytic, hemopexin-like, collagen-binding domains).
• Investigation of antibody-based inhibitors targeting MMP exosites.
• Development of triple-helical mini-proteins utilizing collagen-binding exosites.

Main Results:

• Small molecules and peptides show selectivity for MMP-13, MT1-MMP, MMP-2, and MMP-9 by binding to exosites.
• Antibodies provide selective inhibition for MMP-9 and MT1-MMP via CAT domain exosites.
• Novel probes and inhibitors with improved selectivity across the MMP family have been developed.

Conclusions:

• Targeting exosites is a successful strategy for developing specific MMP inhibitors.
• Diverse approaches, including small molecules, peptides, antibodies, and mini-proteins, can effectively leverage exosite binding for enhanced selectivity.