在Sjögren病的外周发育的所有主要阶段,自我反应的B细胞都增加了
Adrian Ys Lee1,2, Zhankun Qi1, Katherine Jl Jackson3
1Centre for Immunology and Allergy Research, Westmead Institute for Medical Research and Faculty of Medicine and Health, University of Sydney, Westmead, NSW, Australia.
Immunology and cell biology
|February 17, 2025
概括
斯约格伦病 (SjD) 患者在所有发育阶段都显示出自我反应性B细胞的增加. 根据受体特异性而不是发育阶段向B细胞在治疗SjD方面更有效.
科学领域:
- 免疫学 免疫学 免疫学
- 这是一种自身免疫力.
- B细胞生物学B细胞生物学
背景情况:
- 肖格伦病 (SjD) 是一种慢性自身免疫性疾病.
- 增加循环的自我反应性B细胞是SjD的特征.
- 这些细胞在SjD的发育分布尚不清楚.
研究的目的:
- 确定SjD中循环的自我反应性B细胞的免疫类型.
- 为了识别参与SjD病变的特定B细胞子集.
- 为SjD提供更精确的治疗向策略.
主要方法:
- 单细胞分类五个主要的B细胞种群 (过渡期,成熟的原始,切换记忆,双阴性,等离子体).
- 培养精选的B细胞以产生IgG.
- 使用ELISA,流细胞计和间接免疫光学识别自我反应性IgG.
- 免疫球蛋白重链的测序.
主要成果:
- 与健康对照组 (HCs) 相比,SjD患者表现出更高频率的原始和CD21低非典型记忆B细胞.
- 在SjD患者中,抗原经验B细胞显示Ki67和CD86.6的表达增加.
- 在所有外围B细胞发育阶段,SjD患者的自动反应性B细胞高达10倍.
- 在SjD中,自我反应的过渡性B细胞显示出更高的CD38和更低的IgM表面表达.
结论:
- 在耐受性检查点对带有自身抗体的B细胞的反选择减少,有助于增加SjD中的自身反应性B细胞.
- 在SjD中,自反应性B细胞在整个外周发育过程中都存在.
- 针对B细胞以受体特异性而不是发育阶段的治疗策略可能在SjD治疗中更有效.
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