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Osteoprotegerin: multiple partners for multiple functions.

Marc Baud'huin1, Laurence Duplomb, Stéphane Teletchea

  • 1INSERM, UMR957, Nantes F-44035, France; Université de Nantes, Nantes atlantique universités, Laboratoire de Physiopathologie de la Résorption Osseuse et Thérapie des Tumeurs Osseuses Primitives, Nantes F-44035, France; CHU, Hôtel Dieu, Nantes, France.

Cytokine & Growth Factor Reviews
|July 6, 2013
PubMed
Summary
This summary is machine-generated.

Osteoprotegerin (OPG) is crucial for bone health by inhibiting osteoclast formation. This review explores OPG

Keywords:
Cell adhesionGlycosaminoglycansMonocytesOsteoprotegerin

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Area of Science:

  • Biochemistry
  • Molecular Biology
  • Cell Biology

Background:

  • Osteoprotegerin (OPG) is a key regulator of bone turnover.
  • OPG functions as a decoy receptor for Receptor Activator of Nuclear Factor-kB ligand (RANKL), inhibiting osteoclast differentiation.
  • Beyond its role in bone, OPG interacts with other ligands, influencing diverse biological processes.

Purpose of the Study:

  • To provide a comprehensive overview of the various ligands that bind to Osteoprotegerin (OPG).
  • To elucidate the diverse biological functions mediated by these OPG-ligand interactions.
  • To highlight the involvement of OPG in vascular, bone, immune, and tumor biology.

Main Methods:

  • Literature review of in vitro, pre-clinical, and clinical studies.
  • Analysis of OPG's interactions with its known ligands.
  • Synthesis of evidence regarding OPG's multifaceted biological roles.

Main Results:

  • OPG binds to RANKL, inhibiting osteoclast differentiation and bone resorption.
  • OPG also interacts with TNF-related apoptosis inducing ligand (TRAIL), glycosaminoglycans, and proteoglycans.
  • These interactions contribute to OPG's roles in cell survival, proliferation, and migration.

Conclusions:

  • OPG is a pleiotropic protein with functions extending beyond bone metabolism.
  • Understanding OPG-ligand interactions is crucial for comprehending its roles in various physiological and pathological contexts.
  • This review consolidates current knowledge on OPG's diverse biological activities regulated by its ligands.