摘要
Objective: Bacterial DNA has immunostimulatory effect and can induce arthritis; inhibitor of Syk has therapeutic effect in patients with rheumatoid arthritis. In this study, we investigated the role of Syk in the pathogenesis of bacterial DNAinduced arthritis.Methods: We evaluated the role of Syk inhibitor in prevention and treatment of bacterial DNA-induced arthritis animal model and investigated the mechanism that Syk regulated bacterial DNA-induced arthritis. Results: We found that bacterial DNA induced arthritis; inhibitor of Syk R788 prevented and treated arthritis induced by bacterial DNA.Depletion of monocytes/macrophages significantly reduced incidence and severity of arthritis induced by bacterial DNA; Incidence and severity of arthritis induced by bacterial DNA were markedly decreased in TNF deficient mice compared to wild mice. Bacterial DNA stimulated monocytes/macrophages to assembly of lipid rafts that recruit Syk and Toll-like receptor 9(TLR9). Depletion of lipid rafts reduced severity of arthritis induced by bacterial DNA.Conclusions: Syk exerts important role in the pathogenesis of bacterial DNA-induced arthritis; Syk regulates signaling pathway of TLR through lipid rafts.
Objective: Bacterial DNA has immunostimulatory effect and can induce arthritis; inhibitor of Syk has therapeutic effect in patients with rheumatoid arthritis. In this study, we investigated the role of Syk in the pathogenesis of bacterial DNAinduced arthritis.Methods: We evaluated the role of Syk inhibitor in prevention and treatment of bacterial DNA-induced arthritis animal model and investigated the mechanism that Syk regulated bacterial DNA-induced arthritis. Results: We found that bacterial DNA induced arthritis; inhibitor of Syk R788 prevented and treated arthritis induced by bacterial DNA.Depletion of monocytes/macrophages significantly reduced incidence and severity of arthritis induced by bacterial DNA; Incidence and severity of arthritis induced by bacterial DNA were markedly decreased in TNF deficient mice compared to wild mice. Bacterial DNA stimulated monocytes/macrophages to assembly of lipid rafts that recruit Syk and Toll-like receptor 9(TLR9). Depletion of lipid rafts reduced severity of arthritis induced by bacterial DNA.Conclusions: Syk exerts important role in the pathogenesis of bacterial DNA-induced arthritis; Syk regulates signaling pathway of TLR through lipid rafts.
引文