在一种小鼠功能增益模型中,IKK2控制组织定居调节性T细胞的炎症潜力
Chelisa Cardinez1,2,3,4, Yuwei Hao1,2,3,5, Kristy Kwong1,2,3,5
1Centre for Personalised Immunology, John Curtin School of Medical Research, Australian National University, Canberra, ACT, Australia.
Nature communications
|March 26, 2024
概括
在Ikbkb中获得功能突变会放大调节性T细胞 (Treg) 功能,导致小鼠的牛皮和牛皮性关节炎. 过度活跃的IKK2驱动组织内Treg分化和炎症.
科学领域:
- 免疫学 免疫学 免疫学
- 分子生物学分子生物学
- 皮肤病学 皮肤病学
背景情况:
- 在Foxp3+调节性T细胞 (Tregs) 中功能丧失突变得到了充分研究.
- 放大Treg功能或分化的后果在很大程度上是未知的.
研究的目的:
- 调查Ikbkb功能增益突变对Treg生物学和炎症性疾病的影响.
- 确定IKK2在Treg分化和组织居民Treg扩张中的作用.
主要方法:
- 使用了具有异合体和同合体Ikbkb功能增益突变的小鼠 (IkbkbGoF和IkbkbGoF/GoF).
- 在孤立的Tregs上进行了单细胞转录和表型分析.
- 评估疾病表型,包括牛皮,甲状腺炎,脊髓炎和指甲变化.
主要成果:
- 在IkbkbGoF小鼠中发生了牛皮;在IkbkbGoF/GoF小鼠中表现出牛皮关节炎的特征.
- 在IkbkbGoF小鼠中观察到Foxp3+CD25+Tregs的选择性扩张,其中有一个表达IL-17的子集.
- 发现了表达Th17相关基因的组织居民Tregs和NF-κB转录组的扩张,与炎症相关.
结论:
- IKK2是组织居民Treg分化的关键调节者.
- 过度激活IKK2会导致剂量依赖的皮肤和全身炎症,导致牛皮病.
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