一个依赖于微生物群和IL-15的与生俱来的类似B细胞原始体,表达E4BP4BP4
Junming He1,2, Xinlei Hou3, Xiaomei Feng4,5,6,7
1Beijing Tsinghua Changgung Hospital, School of Clinical Medicine, Tsinghua University, Beijing, 102218, China.
Advanced science (Weinheim, Baden-Wurttemberg, Germany)
|December 2, 2025
概括
研究人员确定了一种新的与生俱来的类似B细胞原始体,称为NK-B细胞,在PDK1缺乏的小鼠中得到丰富. 这些细胞由IL-15和肠道微生物群调节,表达E4BP4并分化为B细胞.
科学领域:
- 免疫学 免疫学 免疫学
- 细胞生物学 细胞生物学
- 发展生物学 发展生物学
背景情况:
- 自然杀手 (NK) 细胞和B细胞起源于常见的淋巴细胞原始体.
- 存在和共同表达NK和B细胞标记物 (NK-B细胞) 的细胞的特征受到争论.
- 以前的研究还没有完全阐明这种混合免疫细胞的发育途径和调节机制.
研究的目的:
- 识别和描述 NK-B 细胞的潜在新型种群.
- 研究这些NK-B细胞的发育阶段和功能性质.
- 阐明调控NK-B细胞生存和功能的调控途径.
主要方法:
- 使用了缺乏氨基酸依赖蛋白激酶-1 (PDK1) 的小鼠和野生类型骨髓.
- 采用单细胞RNA测序和高维流细胞测量来进行细胞识别和表征.
- 对淋巴细胞缺乏宿主进行了采养转移实验,并使用了一种新的E4促进体结合蛋白4 (E4BP4) 报告模型.
主要成果:
- 确定了早期B细胞发育阶段 (pro-B/pre-B) 的CD3−NKp46−CD19+NK1.1+细胞 (NK-B细胞) 的显著种群.
- 证明NK-B细胞在收养转移时优先分化为B细胞,并具有先天性特征,分泌IFN-γ和TGF-β.
- 揭示了互白素-15 (IL-15) 信号传递和托尔类受体9 (TLR9) 介导的肠道微生物群的传感合作维持E4BP4表达,这对NK-B细胞存活至关重要.
结论:
- 揭示了一种独特的与生俱来的类似B细胞原始细胞通路,其特征是E4BP4表达.
- 已经确定,这种途径是由IL-15信号传递和肠道微生物群的相互作用来调节的.
- 这些发现为免疫细胞的发育和调节提供了新的见解,突出了具有双重天生的和适应潜力的新型祖先群体.
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