T-bet+ B细胞通过TLR-依赖的机制被内源逆转录病毒激活和控制
Eileen Rauch1,2, Timm Amendt1,3, Aleksandra Lopez Krol1
1Institute of Immunology, Philipps-Universität Marburg, 35043, Marburg, Germany.
Nature communications
|February 9, 2024
概括
内源逆转录病毒 (ERVs) 触发了针对ERV-GFP的自身免疫B细胞反应,揭示了一个新的免疫监测机制. 这一发现突出了ERVs作为疾病的潜在驱动因素和癌症免疫治疗的目标.
科学领域:
- 免疫学 免疫学 免疫学
- 基因组学就是基因组学.
- 病毒学 病毒学
背景情况:
- 内源逆转录病毒 (ERV) 已经融入哺乳动物基因组,但它们在免疫控制,癌症免疫和自身免疫性疾病中的作用尚不清楚.
- 了解ERV-宿主相互作用对于破译免疫耐受性和疾病病原性至关重要.
研究的目的:
- 研究免疫控制对内源性逆转录病毒 (ERVs) 的机制.
- 分析遗传,表观遗传和细胞因子在ERV激活和调节中的作用.
- 探索ERVs作为潜在的抗癌免疫点和自身免疫性疾病的驱动因素的作用.
主要方法:
- 产生具有生殖线Moloney-Murine白血病病毒标记为GFP (ERV-GFP) 感染的小鼠模型.
- 免疫反应的分析,包括B细胞激活,生殖中心形成和细胞因子概况.
- 研究遗传缺陷 (如TLR缺陷小鼠) 对ERV控制的影响.
主要成果:
- 对ERV-GFP新自我抗原的自身反应性B细胞反应被确定为一个关键的ERV控制机制.
- 自发的ERV-GFP+生殖中心形成,血清IFN-γ升高以及与年龄相关的B细胞 (ABCs) 是这种反应的特征.
- 在TLR缺乏的小鼠中,B细胞受体信号受损导致了缺陷的ERV控制,这表明核酸传感的重要性.
结论:
- 内源逆转录病毒 (ERVs) 可以破坏免疫耐受性,并引起对ERV衍生的自身抗原的免疫监测.
- 鉴定到的自身反应性B细胞反应塑造了宿主免疫反应,对理解自身免疫性疾病有意义.
- 在癌症和自身免疫性疾病中,ERVs代表了一类新的自我抗原,可以作为免疫干预的目标.
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