Matrix metalloproteinases in the CNS: interferons get nervous

Area of Science:

• Neuroscience
• Immunology
• Biochemistry

Background:

• Matrix metalloproteinases (MMPs) traditionally linked to extracellular matrix (ECM) degradation in inflammation.
• Disappointing clinical trials prompted re-evaluation of MMP roles.
• Emerging evidence highlights novel functions in viral infections and autoimmune diseases.

Purpose of the Study:

• To explore the multifaceted roles of MMPs beyond ECM degradation.
• To investigate the beneficial and destructive functions of MMPs in central nervous system (CNS) pathologies.
• To discuss therapeutic strategies involving MMP inhibitors.

Main Methods:

• Review of recent scientific literature on MMPs in inflammation and CNS diseases.
• Analysis of MMPs' proteolytic processing of immune signaling molecules (chemokines, cytokines).
• Examination of MMPs' substrate cleavage within the CNS.

Main Results:

• MMPs regulate immune responses through chemokine and cytokine processing, affecting signaling pathways.
• MMPs cleave CNS substrates, contributing to both disease promotion and dampening.
• Over 10 MMPs exhibit protective functions, challenging the initial view of solely pathological roles.

Conclusions:

• MMPs possess diverse functions in CNS pathologies, extending beyond ECM degradation.
• Understanding the dual roles of MMPs is crucial for developing targeted therapies.
• MMP inhibitors offer potential therapeutic strategies for CNS inflammatory diseases.