针对自然IgM的致病性后血性自我识别,以防止移植后的心脏再输血损伤
Carl Atkinson1, Fei Qiao1, Xiaofeng Yang1
1From Department of Microbiology and Immunology, Medical University of South Carolina, Charleston (CA., F.Q., X.Y., P.Z., N.R., S.T.); Department of Medicine and Immunology, University of Colorado Denver, Aurora (L.K., V.M.H.); Department of Pathology, Papworth Hospital, Cambridgeshire, UK (M.G.); and Ralph H. Johnson Veterans Affairs Medical Center, Charleston, SC (S.T.).
Circulation
|April 1, 2015
概括
自然的IgM抗体通过在缺血后识别新位体来促进移植移植的损伤. 一种针对抗附素IV scFv-Crry构造物的新疗法有效地减少了炎症和损伤,而不会损害抗感染免疫力.
科学领域:
- 免疫学 免疫学 免疫学
- 移植免疫学 移植免疫学
- 具有天生的免疫力.
背景情况:
- 自然的IgM抗体是天生的免疫受体,可识别应激细胞上的危险信号,帮助组织稳定.
- 虽然具有保护性,但移植期间的缺血会触发致病性IgM结合和补体激活,导致炎症和损伤.
- 自反应性IgM在器官移植中的作用,包括冷和热缺血,需要研究.
研究的目的:
- 为了研究自我反应性IgM在移植中缺血性损伤后的移植损伤中的作用.
- 确定在缺血后在移植器官上表达的新表位,这些新表位被自然IgM识别.
- 开发和测试一种针对移植中向补体抑制的新疗法策略.
主要方法:
- 将野生型老鼠心脏移植到缺乏抗体的老鼠体内,用特定的IgM单克隆抗体复制.
- 鉴定了移植心脏上的新表位,并评估了IgM识别在移植损伤中的作用.
- 开发的抗附素IV单链抗体 (scFv) 和scFv-Crry结构用于向补体抑制.
主要成果:
- 证明了IgM对移植后新位体的识别是移植损伤的关键.
- 在allograft模型中,scFv和scFv-Crry结构都有效地阻止了IgM结合和补充激活.
- 治疗显著减少了移植体的炎症和损伤,scFv-Crry显示有针对性的作用而不影响抗感染免疫力.
结论:
- 在心脏移植后缺血症上确定了关键的病理生理表位.
- 开发了一种新的,可翻译的策略,用于移植中的向补体抑制.
- 这种方法比目前的方法具有优势,特别是对于免疫抑制的接受者.
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