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Reduced receptor-mediated processing of model immune complexes by macrophages from patients with rheumatoid arthritis and its regulation by cytokines

机译:类风湿关节炎患者巨噬细胞对受体介导的模型免疫复合物的加工减少,并受细胞因子调节

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The present study was conducted to understand the role of peripheral blood-derived monocytes in the pathogenesis of rheumatoid arthritis (RA), their contribution in relation to the receptor-mediated processing of circulating immune-complexes (ICs) and the phenotypic and functional changes they undergo due to the abundant cytokines, In this study we have checked the expression of FcRIII (CD16), CR1 and CR3 on the cultured monocytes of RA patients and their phagocytic activity by flow cytometry, Significantly reduced expression of FcRIII, CR1 and CR3 was observed on the monocyte-derived macrophages of RA patients. Phagocytosis of soluble ICs both in the absence and presence of complement was reduced in RA patients. significant direct relationship was observed between FcRIII expression and FcR-mediated phagocytosis as well as between CR1 expression and complement-mediated phagocytosis, indicating impaired receptor-mediated processing in RA patients, Effect of three cytokines, TNF-beta, IL1-alpha and IFN-gamma on the receptor expression and phagocytic activity was also determined. Our results suggest that receptor expression and phagocytic activity of monocyte population in RA is affected by the existing cytokine milieu. [References: 28]
机译:进行本研究的目的是了解外周血源性单核细胞在类风湿关节炎(RA)发病机理中的作用,它们在循环介导的免疫复合物(ICs)受体介导的加工过程中的贡献以及它们的表型和功能变化由于存在丰富的细胞因子,本研究通过流式细胞术检查了FcRIII(CD16),CR1和CR3在RA患者培养的单核细胞中的表达及其吞噬活性,观察到FcRIII,CR1和CR3的表达明显降低在RA患者的单核细胞衍生巨噬细胞中。在RA患者中,在不存在补体和存在补体的情况下,可溶性IC的吞噬作用均降低。在FcRIII表达和FcR介导的吞噬作用之间以及CR1表达和补体介导的吞噬作用之间观察到显着的直接关系,表明在RA患者中受体介导的加工受损,三种细胞因子,TNF-beta,IL1-alpha和IFN-α的作用。还确定了γ对受体的表达和吞噬活性。我们的结果表明,RA中单核细胞群体的受体表达和吞噬活性受现有细胞因子环境的影响。 [参考:28]

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