title: Key roles of the OPG-RANK-RANKL system in bone oncology.
abstract: Osteoprotegerin (OPG)-receptor activator of nuclear factor-kappaB (RANK) and RANK ligand (RANKL) have been identified as members of a ligand-receptor system that directly regulates osteoclast differentiation and osteolysis. RANKL may be a powerful inducer of bone resorption through its interaction with RANK, and OPG is a soluble decoy receptor that acts as a strong inhibitor of osteoclastic differentiation. Any dysregulation of their respective expression leads to pathological conditions. Furthermore, recent data demonstrate that the OPG-RANK-RANKL system modulates cancer cell migration, thus controlling the development of bone metastases. This review describes the most recent knowledge on the OPG-RANK-RANKL system, its involvement in bone oncology and the new therapeutic approaches based on this molecular triad.
authors.affiliation: Université de Nantes, Nantes Atlantique Universités, Laboratoire de Physiopathologie de la Résorption Osseuse et Thérapie des Tumeurs Osseuses Primitives, EA3822, Nantes, F-44035 France. marc.baud-huin@etu.univ-nantes.fr
authors.forename: M
authors.initials: M
authors.lastname: Baud'huin
authors.forename: L
authors.initials: L
authors.lastname: Duplomb
authors.forename: C
authors.initials: C
authors.lastname: Ruiz Velasco
authors.forename: Y
authors.initials: Y
authors.lastname: Fortun
authors.forename: D
authors.initials: D
authors.lastname: Heymann
authors.forename: M
authors.initials: M
authors.lastname: Padrines
mesh_terms: D000818:Animals; D001859:Bone Neoplasms / Q000378:metabolism* / Q000473:pathology* / Q000503:physiopathology; D016723:Bone Remodeling / Q000502:physiology; D001862:Bone Resorption / Q000378:metabolism / Q000473:pathology / Q000503:physiopathology; D006801:Humans; D053244:Osteoprotegerin / Q000502:physiology*; D053245:RANK Ligand / Q000502:physiology*; D053246:Receptor Activator of Nuclear Factor-kappa B / Q000502:physiology*
chemical_list: D053244:Osteoprotegerin; D053245:RANK Ligand; D053246:Receptor Activator of Nuclear Factor-kappa B; C505686:TNFRSF11A protein, human