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Matrix metalloproteinases and angiogenesis.

Joyce E Rundhaug1

  • 1Department of Carcinogenesis, Science Park--Research Division, The University of Texas M. D. Anderson Cancer Center, Smithville, TX, 78957, USA. jrundhaug@mdanderson.org

Journal of Cellular and Molecular Medicine
|June 21, 2005
PubMed
Summary

Matrix metalloproteinases (MMPs) are enzymes crucial for blood vessel formation (angiogenesis). While MMPs can promote or inhibit angiogenesis, their complex roles necessitate careful evaluation of MMP inhibitors in clinical trials.

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Area of Science:

  • Biochemistry
  • Cell Biology
  • Molecular Biology

Background:

  • Matrix metalloproteinases (MMPs) are enzymes that degrade extracellular matrix (ECM).
  • Angiogenesis, the formation of new blood vessels, involves ECM remodeling.
  • MMPs play a complex role in angiogenesis beyond ECM degradation.

Purpose of the Study:

  • To elucidate the multifaceted roles of MMPs in angiogenesis.
  • To highlight the mechanisms by which MMPs influence blood vessel formation.
  • To underscore the importance of evaluating MMP inhibitors in cancer therapy.

Main Methods:

  • Review of existing literature on MMPs and angiogenesis.
  • Analysis of MMP functions in endothelial cell migration and invasion.
  • Examination of MMPs' interactions with growth factors and cell adhesion molecules.

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Main Results:

  • MMPs enhance angiogenesis by detaching pericytes, releasing growth factors, exposing binding sites, and cleaving cell adhesions.
  • MMPs can inhibit angiogenesis by generating inhibitors and modulating cell signaling.
  • Specific MMPs have diverse and sometimes opposing effects on blood vessel formation.

Conclusions:

  • MMPs exhibit dual roles in angiogenesis, acting as both promoters and inhibitors.
  • Understanding these complex roles is critical for developing effective anti-angiogenic therapies.
  • Clinical trials of MMP inhibitors require careful assessment to ensure they do not inadvertently promote angiogenesis.