在多发性硬化症中,记忆B细胞激活大脑的自动反应性CD4+T细胞
Ivan Jelcic1, Faiez Al Nimer2, Jian Wang1
1Neuroimmunology and MS Research Section (NIMS), Neurology Clinic, University of Zurich, University Hospital Zurich, 8091 Zurich, Switzerland.
Cell
|September 4, 2018
概括
多发性硬化症涉及遗传和环境因素. 这项研究表明HLA-DR15阳性患者的T细胞自我反应率升高,由B细胞介导,并确定了脑特异性自身抗原RASGRP2.
科学领域:
- 神经免疫学
- 自体免疫性
- 免疫遗传学
背景情况:
- 多发性硬化症是一种由遗传和环境因素引起的自身免疫性疾病.
- 这些因素产生自反应性T细胞的确切机制尚不清楚.
- 这种HLA-DR15类型是MS的重要遗传风险因素.
研究的目的:
- 研究HLA-DR15在多发性硬化症T细胞自身活性中的作用.
- 阐明B细胞在T细胞自我反应中的作用.
- 确定在多发性硬化中向的特定自身抗原.
主要方法:
- 在患有HLA-DR15单元型的患者中评估T细胞自增殖.
- 研究了以HLA-DR依赖的方式对T细胞自增殖的B细胞调解.
- 使用抗CD20疗法消耗B细胞,并观察其对T细胞自增殖的影响.
- 使用T细胞受体深度测序来表征自增殖的T细胞.
- 使用无偏见的表位发现来识别目标自身抗原.
主要成果:
- 在携带HLA- DR15单元型的患者中,T细胞自增多率升高.
- 记忆B细胞以HLA-DR依赖的方式调解T细胞自增殖.
- 在体外和体内,抗CD20治疗减少了T细胞自增殖.
- 自生增殖的T细胞被丰富为大脑定位的表型.
- RASGRP2被确定为大脑和B细胞表达的目标自身抗原.
结论:
- 在MS中,HLA- DR15类型与B细胞介导的T细胞自我反应性增加有关.
- 特别是抗CD20的B细胞枯竭可以减少T细胞自增殖.
- 在MS的发病过程中,RASGRP2是潜在的自身抗原标.
- 这些发现提供了有关致病性B-T细胞相互作用和MS潜在治疗策略的见解.
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