title: Expression of inflammatory cytokines, RANKL and OPG induced by titanium, cobalt-chromium and polyethylene particles.
abstract: Bone resorption is regulated by cytokines such as tumor necrosis factor-alpha (TNF-alpha), interleukin-1 beta (IL-1beta) and by the balance of a receptor activator of nuclear factor-kappaB ligand (RANKL) and osteoprotegerin (OPG). The aim of this study was to investigate the mechanism of particle-induced osteolysis in murine calvariae by assessing the extent of osteolysis and the expression of inflammatory cytokines, RANKL and OPG after implantation of metal and polyethylene particles. The murine calvariae implanted with Ti6Al4V, CoCr or high-density polyethylene (HDP) particles showed significantly more extensive osteolysis and elevated levels of inflammatory cytokines. The ratio between RANKL and OPG was high in the mice implanted with Ti6Al4V and HDP particles, but not in the mice implanted with CoCr particles. These observations suggested that CoCr particle-induced osteoclastogenesis may be caused directly by inflammatory cytokines rather than by the RANKL-RANK pathway. There might be different mechanisms at work in particle-induced osteolysis between Ti6Al4V, HDP and CoCr.
authors.affiliation: Department of Orthopaedic Surgery, Nagoya University School of Medicine, 65 Tsurumai-Cho, Showa-ku, Nagoya, Aichi 4668550, Japan. tm1998@qc4.so-net.ne.jp
authors.forename: Tetsuo
authors.initials: T
authors.lastname: Masui
authors.forename: Shinji
authors.initials: S
authors.lastname: Sakano
authors.forename: Yukiharu
authors.initials: Y
authors.lastname: Hasegawa
authors.forename: Hideki
authors.initials: H
authors.lastname: Warashina
authors.forename: Naoki
authors.initials: N
authors.lastname: Ishiguro
mesh_terms: D000818:Animals; D001672:Biocompatible Materials / Q000009:adverse effects; D002352:Carrier Proteins / Q000276:immunology* / Q000378:metabolism; D002858:Chromium Alloys / Q000009:adverse effects*; D005549:Foreign-Body Reaction / Q000209:etiology / Q000276:immunology / Q000378:metabolism; D005786:Gene Expression Regulation / Q000276:immunology; D006023:Glycoproteins / Q000276:immunology* / Q000378:metabolism; D008422:Materials Testing; D008562:Membrane Glycoproteins / Q000276:immunology* / Q000378:metabolism; D008571:Men; D051379:Mice; D008810:Mice, Inbred C57BL; D008863:Microspheres; D010014:Osteolysis / Q000209:etiology* / Q000276:immunology* / Q000378:metabolism / Q000473:pathology; D053244:Osteoprotegerin; D010316:Particle Size; D020959:Polyethylene / Q000009:adverse effects*; D016459:Prosthesis-Related Infections / Q000209:etiology / Q000276:immunology / Q000378:metabolism; D053245:RANK Ligand; D053246:Receptor Activator of Nuclear Factor-kappa B; D018160:Receptors, Cytoplasmic and Nuclear / Q000276:immunology* / Q000378:metabolism; D018124:Receptors, Tumor Necrosis Factor; D014025:Titanium / Q000009:adverse effects*
chemical_list: D001672:Biocompatible Materials; D002352:Carrier Proteins; D002858:Chromium Alloys; D006023:Glycoproteins; D008562:Membrane Glycoproteins; D053244:Osteoprotegerin; D053245:RANK Ligand; D053246:Receptor Activator of Nuclear Factor-kappa B; D018160:Receptors, Cytoplasmic and Nuclear; D018124:Receptors, Tumor Necrosis Factor; C505687:Tnfrsf11a protein, mouse; C506031:Tnfrsf11b protein, mouse; C505689:Tnfsf11 protein, mouse; D020959:Polyethylene; D014025:Titanium