补体调节受损导致肺移植后慢性肺异位功能障碍
Hrishikesh S Kulkarni1,2, Laneshia K Tague1, Daniel R Calabrese3,4
1Department of Medicine, Washington University School of Medicine, St. Louis, MO, USA.
对补充激活的遗传倾向与肺移植 (LTx) 后更糟糕的结果有关. 这种遗传因素促进B细胞激活,增加慢性肺异位移植功能障碍 (CLAD) 的风险.
科学领域:
- 免疫学 免疫学 免疫学
- 移植科学 移植科学
- 遗传学 是一个遗传学.
背景情况:
- 慢性肺异位移植功能障碍 (CLAD) 是肺移植 (LTx) 后死亡的主要原因.
- 补体系统在先天性和适应性免疫中起着至关重要的作用,在LTx后很早就开始活跃.
- 了解影响补充激活的遗传因素对于改善LTx结果至关重要.
研究的目的:
- 调查补充成分3 (C3R102G) 中特定的遗传多态性和LTx受体中无CLAD存活率之间的关联.
- 探索补充体调节受损在适应性共免疫和CLAD发展中的作用.
- 确定补充剂激活对B细胞群和捐赠者特异性抗体 (DSA) 水平的影响.
主要方法:
- 在两个独立的LTx受体队列中分析一个功能C3多态 (C3R102G).
- 与C3R102G状态相关的无CLAD生存率的评估,特别是在DSA阳性接受者中.
- 使用小鼠正管肺移植模型研究补充体调节受损对移植病理和免疫细胞透的影响.
主要成果:
- 在超过三分之一的LTx接受者中存在的C3R102G多态性与明显更差的CLAD无存活率有关.
- 这种关联在开发出供体特异抗体 (DSA) 的接受者中更为明显.
- 在小鼠模型中,补体调节受损导致更严重的气道病变,并增加了内移植内存B细胞和抗体分泌细胞的积累,与较高的DSA水平相关.
结论:
- 通过C3R102G多态,对增强补体激活的遗传倾向与肺移植后较差的CLAD-free生存有关.
- 补体调节受损促进B细胞激活和抗体产生,有助于CLAD的发展.
- 向补充通路可能提供一种治疗策略,以减轻CLAD并改善长期肺异构移植生存率.
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