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Unraveling metalloproteinase function in skeletal biology and disease using genetically altered mice

Alison Aiken1, Rama Khokha

  • 1Ontario Cancer Institute/University Health Network, Department of Medical Biophysics, University of Toronto, Ontario, Canada M5G 2M9.

Biochimica Et Biophysica Acta
|July 21, 2009
PubMed

Insights

Metalloproteinases, including matrix metalloproteinases (MMPs), ADAMs, and ADAMTS proteases, are crucial for bone development and remodeling. Deficiencies in these enzymes lead to skeletal abnormalities and impact conditions like osteoarthritis.

Area of Science:

  • Biochemistry
  • Molecular Biology
  • Skeletal Biology

Background:

  • The metalloproteinase superfamily encompasses matrix metalloproteinases (MMPs), ADAMs, and ADAMTS proteases, enzymes critical for protein processing.
  • Genetic models, particularly knockout mice for individual or paired metalloproteinases, have revealed spontaneous skeletal abnormalities.

Purpose of the Study:

  • To review the multifaceted roles of metalloproteinases in skeletal development and homeostasis.
  • To elucidate how metalloproteinases mediate cell-cell interactions within the bone microenvironment.
  • To highlight the implications of metalloproteinase function in skeletal diseases such as osteoarthritis and rheumatoid arthritis.

Main Methods:

  • Review of existing literature on metalloproteinase function in skeletal biology.
  • Analysis of data from genetically modified mouse models deficient in specific metalloproteinases.
  • Correlation of metalloproteinase activity with observed skeletal phenotypes and disease states.

Main Results:

  • Metalloproteinases are essential for both endochondral and intramembranous ossification processes.
  • These enzymes facilitate critical communication pathways between distinct bone cell types.
  • Deficiency or dysregulation of metalloproteinases contributes significantly to skeletal abnormalities and inflammatory joint diseases.

Conclusions:

  • Matrix metalloproteinases (MMPs), ADAMs, and ADAMTS proteases are indispensable regulators of skeletal development, remodeling, and overall homeostasis.
  • Understanding metalloproteinase function provides insights into the pathogenesis of skeletal disorders and potential therapeutic targets.

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