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转基因-CSF依赖的CD301b+肺树突细胞赋予了对吸入过敏原的耐受性

Christina L Wilkinson¹, Keiko Nakano¹, Sara A Grimm²

¹Immunity, Inflammation and Disease Laboratory, Division of Intramural Research, National Institute of Environmental Health Sciences, NIH, Research Triangle Park, North Carolina 27709, USA.

Research square

|June 17, 2024

概括

研究人员发现特定的肺树突细胞 (CD301b+cDC2s) 诱导T调控细胞,促进对过敏原的耐受性. 颗粒细胞 - 巨细胞殖民地刺激因子 (GM-CSF) 增强了这些细胞,维持了肺部平衡.

科学领域:

免疫学免疫学免疫学
细胞生物学细胞生物学
呼吸系统医学呼吸系统医学

背景情况:

过敏性喘的严重程度取决于T调节 (Treg) 和T辅助 (Th) 2细胞之间的平衡.
特定树突细胞子集在指导Treg和Th2细胞分化中的作用尚不清楚.

研究的目的:

识别调节Treg和Th2细胞分化的常规树突细胞 (cDC) 子集.
为了研究CD301b+类型2cDCs (cDC2s) 在过敏敏感化和肺平衡中的功能.

主要方法:

单细胞RNA测序用于分析cDC子集.
在小鼠中进行了收养转移实验,以评估T细胞分化和免疫耐受性.
评估了GM-CSF在cDC发展和功能中的作用.

主要成果:

一个表达高CD301b的肺内cDC2s子集表现出强大的Treg诱导活性ex vivo.
在过敏敏感化过程中,CD301b+cDC2s转换为CD200+cDC2s,促进Th2分化.
在体内,GM-CSF增强了Treg诱导的CD301b+cDC2s的发展和维持.
通过吸收来自肺部的CD301b+cDC2s的转移,使其对吸入过敏原产生耐受性.

结论:

肺内CD301b+cDC2s在诱导Treg细胞和促进免疫耐受性方面发挥着至关重要的作用.
转基因-CSF通过增加Treg诱导CD301b+cDC2s的数量来支持肺内稳定.

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