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High molecular weight hyaluronic acid regulates osteoclast formation by inhibiting receptor activator of NF-κB ligand through Rho kinase.
Ariyoshi, W; Okinaga, T; Knudson, C B; Knudson, W; Nishihara, T.
Afiliación
  • Ariyoshi W; Division of Infections and Molecular Biology, Department of Health Promotion, Kyushu Dental University, Kitakyushu, Fukuoka, Japan. Electronic address: arikichi@kyu-dent.ac.jp.
  • Okinaga T; Division of Infections and Molecular Biology, Department of Health Promotion, Kyushu Dental University, Kitakyushu, Fukuoka, Japan. Electronic address: t-oki@kyu-dent.ac.jp.
  • Knudson CB; Department of Anatomy and Cell Biology, The Brody School of Medicine, East Carolina University, Greenville, NC, USA. Electronic address: knudsonc@ecu.edu.
  • Knudson W; Department of Anatomy and Cell Biology, The Brody School of Medicine, East Carolina University, Greenville, NC, USA. Electronic address: knudsonw@ecu.edu.
  • Nishihara T; Division of Infections and Molecular Biology, Department of Health Promotion, Kyushu Dental University, Kitakyushu, Fukuoka, Japan. Electronic address: tatsujin@kyu-dent.ac.jp.
Osteoarthritis Cartilage ; 22(1): 111-20, 2014 Jan.
Article en En | MEDLINE | ID: mdl-24185105
OBJECTIVE: To determine the effects of high molecular weight hyaluronic acid (HMW-HA) on osteoclast differentiation by monocytes co-cultured with stromal cells. METHODS: Mouse bone marrow stromal cell line ST2 cells were incubated with HMW-HA or 4-methylunbeliferone (4-MU) for various times. In some experiments, cells were pre-treated with the anti-CD44 monoclonal antibody (CD44 mAb) or Rho kinase pathway inhibitors (simvastatin or Y27632), then treated with HMW-HA. The expression of receptor activator of NF-κB ligand (RANKL) was determined using real-time reverse transcription polymerase chain reaction (RT-PCR), western blotting, and immunofluorescence microscopy, while the amount of active RhoA was measured by a pull-down assay. To further clarify the role of HMW-HA in osteoclastogenesis, mouse monocyte RAW 264.7 cells were co-cultured with ST2 cells pre-stimulated with 1,25(OH)2D3. Osteoclast-like cells were detected by staining with tartrate-resistant acid phosphatase (TRAP). RESULTS: HMW-HA decreased RANKL mRNA and protein expressions, whereas inhibition of hyaluronic acid (HA) synthesis by 4-MU enhanced RANKL expression. Blockage of HA-CD44 binding by CD44 mAb suppressed HMW-HA-mediated inhibition of RANKL. Pull-down assay findings also revealed that HMW-HA transiently activated RhoA in ST2 cells and pre-treatment with CD44 mAb inhibited the activation of RhoA protein mediated by HMW-HA. Moreover pre-treatment with Rho kinase pathway inhibitors also blocked the inhibition of RANKL by HMW-HA. Co-culture system results showed that HMW-HA down-regulated differentiation into osteoclast-like cells by RAW 264.7 cells induced by 1,25(OH)2D3-stimulated ST2 cells. CONCLUSIONS: These results indicated that HA-CD44 interactions down-regulate RANKL expression and osteoclastogenesis via activation of the Rho kinase pathway.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Osteoclastos / Ligando RANK / Quinasas Asociadas a rho / Ácido Hialurónico Límite: Animals Idioma: En Revista: Osteoarthritis Cartilage Asunto de la revista: ORTOPEDIA / REUMATOLOGIA Año: 2014 Tipo del documento: Article Pais de publicación: Reino Unido
Texto completo
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Osteoclastos / Ligando RANK / Quinasas Asociadas a rho / Ácido Hialurónico Límite: Animals Idioma: En Revista: Osteoarthritis Cartilage Asunto de la revista: ORTOPEDIA / REUMATOLOGIA Año: 2014 Tipo del documento: Article Pais de publicación: Reino Unido