MT1-MMP on the cell surface causes focal degradation of gelatin films

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Updated: Oct 30, 2026

Quantitative Measurement of Invadopodia-mediated Extracellular Matrix Proteolysis in Single and Multicellular Contexts
14:23

Quantitative Measurement of Invadopodia-mediated Extracellular Matrix Proteolysis in Single and Multicellular Contexts

Published on: August 27, 2012

M P d'Ortho1, H Stanton, M Butler

  • 1INSERM U296, Faculté de Médecine, Créteil, France.

FEBS Letters
|February 19, 1998
PubMed

Insights

Membrane-type matrix metalloproteinases (MT-MMPs), like MT1-MMP, initiate matrix degradation and progelatinase A activation. Cell surface MT1-MMP expression causes gelatin proteolysis, inhibited by TIMP-2, highlighting its role in extracellular matrix remodeling.

Area of Science:

  • Biochemistry
  • Cell Biology
  • Molecular Biology

Background:

  • Membrane-type matrix metalloproteinases (MT-MMPs) are a distinct subclass of MMPs.
  • MT-MMPs feature a transmembrane domain and initiate progelatinase A (MMP-2) activation.
  • Emerging evidence suggests MT-MMPs directly degrade matrix macromolecules.

Purpose of the Study:

  • To investigate the cell surface activity of MT1-MMP.
  • To determine if MT1-MMP mediates extracellular matrix degradation.
  • To assess the role of TIMP-1 and TIMP-2 in MT1-MMP-mediated proteolysis.

Main Methods:

  • Utilized cells engineered to express MT1-MMP on their surface.
  • Assessed proteolysis of a gelatin film substrate.
  • Evaluated the inhibitory effects of TIMP-1 and TIMP-2.

Main Results:

  • Cells expressing MT1-MMP demonstrated significant proteolysis of the gelatin film.
  • This MT1-MMP-induced proteolysis was effectively inhibited by TIMP-2.
  • TIMP-1 did not inhibit the observed proteolysis.

Conclusions:

  • Cell surface expression of MT1-MMP directly contributes to extracellular matrix degradation.
  • MT1-MMP plays a dual role in activating progelatinase A and degrading matrix components.
  • TIMP-2 is a specific inhibitor of MT1-MMP-mediated matrix degradation.

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