Matrix Metalloproteinases: From Molecular Mechanisms to Physiology, Pathophysiology, and Pharmacology

Area of Science:

• Biochemistry
• Molecular Biology
• Pharmacology

Background:

• Matrix metalloproteinases (MMPs) are enzymes discovered in 1962, initially known for degrading extracellular matrix.
• MMPs also regulate cell signaling, immune responses, and gene transcription, indicating broader biological functions.
• MMPs are implicated in inflammatory, autoimmune, cancer, and pathogen-mediated diseases, with complex roles in disease progression and resolution.

Purpose of the Study:

• To review major discoveries and milestones in matrix metalloproteinase (MMP) research.
• To discuss the outcomes of clinical trials involving MMP inhibitors, particularly their failures in cancer and inflammatory diseases.
• To explore current misconceptions and future strategies for inhibiting detrimental MMP functions.

Main Methods:

• Literature review of MMP research, clinical trials, and preclinical/pathological studies.
• Discussion of biochemical tools for tracking MMP activity in vivo and ex vivo.
• Exploration of novel pharmacological approaches for MMP inhibition.

Main Results:

• MMP inhibitors have largely failed in clinical trials for cancer and inflammatory diseases due to complex MMP roles.
• Despite extensive research, significant knowledge gaps and misconceptions about MMP functions persist.
• New tools and strategies are emerging for better understanding and targeting MMPs.

Conclusions:

• Matrix metalloproteinases (MMPs) possess multifaceted roles in health and disease, requiring nuanced therapeutic strategies.
• Overcoming challenges in MMP inhibition necessitates a deeper understanding of their specific functions and substrates.
• Future research should focus on advanced biochemical tools and targeted pharmacological interventions for effective disease management.