亲溶解巨诱导的IL-35+但不是TGF-β1+ 调节性B细胞激活 需要PD-L1/PD-1通路
Guoqin Cao1,2, Takumi Memida1, Shengyuan Huang2
1Department of Oral Science and Translational Research, College of Dental Medicine, Nova Southeastern University, 3200 South University Drive, Fort Lauderdale, FL 33328, USA.
International journal of molecular sciences
|June 13, 2025
概括
亲溶解的M2巨细胞通过PD-L1/PD-1信号传导诱导调节性B细胞 (Breg),促进IL-35的表达. 这种相互作用对免疫平衡至关重要,突出了炎症解决的新型调节机制.
科学领域:
- 免疫学 免疫学 免疫学
- 细胞生物学 细胞生物学
- 炎症研究 炎症研究
背景情况:
- 免疫平衡依赖于调节性B细胞 (Breg) 和M2巨细胞之间的相互作用.
- M2巨细胞利用PD-L1进行免疫调节,影响PD-1信号传递.
- 虽然Breg对M2巨细胞的影响已知,但M2巨细胞对Breg分化的调控理解较少.
研究的目的:
- 在体外研究M2巨对Breg诱导的影响.
- 阐明潜在的机制 M2 巨介导的布雷格分化.
- 确定PD-L1/PD-1通路在这种相互作用中的作用.
主要方法:
- 用IL-4/IL-13将骨髓衍生的巨细胞分离和体外偏离到M2表型中.
- 脊髓B细胞 (野生型或PD-1淘汰) 与天真 (M0) 或M2巨细胞的共同培养,带有或没有跨井插入.
- 流细胞计和免疫光染色以评估B细胞中的IL-10,IL-35和TGF-β1表达.
- 用重组PD-L1刺激激活的B细胞,以评估IL-35和TGF-β1的产生.
主要成果:
- M2巨细胞显著增加了B细胞中的IL-35和TGF-β1表达,这种效应取决于细胞与细胞的接触.
- 在B细胞中,PD-L1/PD-1信号对M2巨诱导的IL-35产生至关重要.
- 在B细胞中,M2巨诱导的TGF-β1产生独立于PD-L1/PD-1通路发生.
- 激活B细胞中的IL-35表达随着PD-L1刺激而增加,而TGF-β1无论PD-L1.
结论:
- 亲溶解的M2巨细胞通过PD-L1/PD-1信号传递诱导产生IL-35的调节性B细胞.
- PD-L1 / PD-1通路对于M2巨细胞介导的Breg激活至关重要,特别是对于IL-35诱导.
- 这项研究揭示了一种新的机制,即M2巨细胞调节布雷格分化,有助于免疫解决.
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