肌痛性胸腺重编程类切换的B细胞成为依赖BAFF的幸存者
Yuanqing Yan1, Diego Avella Patino2, Yimeng Zhao1
1Department of Surgery, Division of Thoracic Surgery, Feinberg School of Medicine, Northwestern University, Chicago, IL, 60611.
bioRxiv : the preprint server for biology
|September 26, 2025
概括
在肌痛性骨髓灰质炎 (MG) 中,胸膜B细胞通过调高BAFF生存信号来逃避正常耐受性. 这一发现揭示了新的治疗点,如自身免疫性疾病的BAFF-BCMA轴.
科学领域:
- 免疫学 免疫学 免疫学
- 神经免疫学 神经免疫学
- 细胞生物学 细胞生物学
背景情况:
- 骨髓灰质炎 (MG) 自体抗体标位不能可靠地预测疾病的严重程度或治疗结果.
- 胸膜切除术在MG中提供了不一致的好处,尽管它去除了自身反应性B细胞的来源.
研究的目的:
- 研究MG中胸膜B细胞获得独立于正常耐受性检查点的生存途径的机制.
- 通过了解胸腺B细胞的持久性来确定MG的新型治疗点.
主要方法:
- 单细胞RNA测序,V(D) J目录分析,以及来自MG患者的237,661个人类胸膜细胞的空间转录学.
- 对B细胞信号通路的分析,包括抗原呈现,共刺激和生存信号.
- 研究T毛囊辅助细胞与B细胞的相互作用.
主要成果:
- 在MG病变发生过程中发现了一种新的耐受性检查点交换.
- 胸膜生殖中心的病态B细胞显示抗原呈现减少和CD40协同刺激.
- 这些B细胞上调了TNFRSF17,使BAFF参与生存,导致多克隆自身反应性B细胞的持久性.
- 毛囊T辅助细胞通过TNFSF13B和CHGB表达促进了这种转变.
结论:
- BAFF-BCMA轴是MG自反应性B细胞持久性的关键驱动因素,绕过正常耐受性.
- 与自身抗体标位相比,血清BAFF和可溶性BCMA可以作为优越的生物标志物.
- 针对BAFF-BCMA轴或调节CD40信号提供了MG和其他自身免疫性疾病的潜在新治疗策略.
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