在抗脂综合征中,非典型的CD11c高和CD21低记忆B细胞中富含酸丁胆特异性B细胞
Eduard Nitschke1,2, Van Duc Dang1,2,3, Hector Rincon-Arevalo1,2,4,5
1Department of Rheumatology and Clinical Immunology, Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Berlin, Germany.
抗脂综合征 (APS) 涉及非典型B细胞的增加,特别是脂胆 (PtC) 特定的细胞. 这些细胞与抗脂自身抗体 (aPL) 相相关,这表明它们在APS病变发生过程中起着作用.
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:
- 抗脂综合征 (APS) 患者由于抗脂自身抗体 (aPL) 的存在,患血栓和妊娠并发症的风险更高.
- 驱动APS的确切机制,包括特定自身抗体和自身反应性B细胞的作用,尚未完全理解.
- B细胞是APS的关键参与者,作为抗体分泌血细胞的前体.
研究的目的:
- 为了研究APS中的B细胞失调.
- 分析B细胞子集的分布,重点关注酸丁胆 (PtC) 特定的B细胞.
- 探索PtC特异性B细胞与抗脂自身抗体 (aPL) 水平之间的关系.
主要方法:
- 流细胞测量用于从健康对照组和APS患者 (初级和二级) 的外周血液单核细胞 (PBMCs) 中分析B细胞子集.
- 一种基于脂质体的新方法在这些子集中确定了酸丁胆 (PtC) 特定的B细胞.
- 通过ELISA测量了aPL抗体的血清水平,并进行了相关性分析.
主要成果:
- 初级APS (pAPS) 和二次APS (sAPS) 的患者显示不典型的CD21low和CD11chighB细胞的频率显著更高,包括PtC特异性的B细胞.
- 在pAPS患者中观察到总和未切换的记忆PtC特异性B细胞的水平升高,与aPL抗体标位相关.
- 无监督聚类证实了ptC特异性CD21低CD11chigh未切换和切换的pAPS和sAPS内存B细胞的增加.
结论:
- 在非典型记忆B细胞子集 (CD21lowCD11chigh) 中增加的PtC特异性B细胞在APS患者中的存在是显著的.
- 这些发现表明,这些非典型的B细胞记忆子集与APS中自身抗体的产生之间存在直接联系.
- 这项研究突出了一个潜在的机制,涉及特定的B细胞种群在抗脂综合征的发病.
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