静脉注射的马球蛋白通过一种新的T(H) 2通路抑制炎症
Robert M Anthony1, Toshihiko Kobayashi, Fredrik Wermeling
1Laboratory of Molecular Genetics and Immunology, The Rockefeller University, 1230 York Avenue, New York, New York 10065, USA.
Nature
|June 21, 2011
概括
高剂量静脉注射免疫球蛋白 (IVIG) 含有化IgG片段 (sFc),可以抑制炎症. 这通过一种新的途径发生,涉及髓状细胞,IL-33和基细胞,为自身免疫性疾病提供治疗潜力.
科学领域:
- 免疫学 免疫学 免疫学
- 类风湿病学 类风湿病学
- 分子医学是分子医学.
背景情况:
- 高剂量静脉注射免疫球蛋白 (IVIG) 是一种治疗自身免疫性疾病的疗法.
- 它的抗炎作用与化IgG结晶碎片 (sFc) 有关.
- 这些sFc向表达树突细胞特异ICAM-3抓取非整蛋白 (DC-SIGN) 的髓状细胞.
研究的目的:
- 为了阐明IVIG抗炎活性的机制.
- 描述DC-SIGN通路在免疫平衡中的作用.
- 探索自身免疫性疾病的治疗策略.
主要方法:
- 人性化的DC-SIGN小鼠 (hDC-SIGN) 的生成.
- 转移sFc处理的髓状细胞以评估抗炎作用.
- 对细胞因子 (IL-33,IL-4) 和Fc受体 (FcγRIIB) 表达的分析.
- 诱导性关节炎模型的评估.
主要成果:
- 用sFc处理的髓状细胞的转移模仿了IVIG的抗炎作用.
- sFc的使用诱导了IL-33的产生,导致IL-4产生的基细胞扩张.
- 这条通路在巨细胞上调节FcγRIIB,抑制关节炎.
- 接受IL-33治疗的基细胞的转移也抑制了关节炎.
结论:
- 由sFc启动的新型DC-SIGN-T(H) 2通路调节免疫平衡.
- 这一途径涉及IL-33,基和FcγRIIB在巨细胞上升调节.
- 这种机制为自身免疫性疾病提供了潜在的治疗点.
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