抗HA糖形式驱动B细胞亲和选择,并确定流感疫苗的有效性
Taia T Wang1, Jad Maamary1, Gene S Tan2
1The Laboratory of Molecular Genetics and Immunology, The Rockefeller University, 1230 York Avenue, New York, NY 10065, USA.
Cell
|July 4, 2015
概括
化免疫复合体 (sFcs) 通过促进B细胞选择更高亲和力的抗体来增强疫苗反应. 这一发现为开发针对流感等病原体的广泛中和抗体提供了新的策略.
科学领域:
- 免疫学 免疫学 免疫学
- 疫苗学 疫苗学 疫苗学
- 结构生物学 结构生物学
背景情况:
- 保护性疫苗通过B细胞受体 (BCR) 选择免疫复合体 (ICs) 诱导高亲缘性抗体.
- 由IgG亚类和Fc糖成分影响的Fc-Fc受体 (FcR) 相互作用对于抗体亲和力成熟至关重要.
- 流感疫苗接种调节抗血素 (HA) IgG亚类和Fc甘氨酸,与化Fc甘氨酸 (sFcs) 预测疫苗反应质量.
研究的目的:
- 阐明化Fc甘氨酸 (sFcs) 调节B细胞受体 (BCR) 亲和选择的机制.
- 研究Fc-Fc受体 (FcR) 相互作用,特别是CD23和FcγRIIB在sFc介导的亲和力成熟中的作用.
- 探索使用含有sFc的免疫复合体 (ICs) 进行免疫的潜力,以产生高亲和度,广泛中和抗体.
主要方法:
- 在接种流感疫苗后对抗血凝素 (HA) IgG亚类和Fc糖甘成分的分析.
- 调查sFc与II型Fc受体CD23的结合及其对B细胞抑制FcγRIIB表达的影响.
- 使用sFc-HA ICs进行免疫研究,以评估引起的抗体反应,包括亲和力和中和范围.
主要成果:
- 发现化Fc甘氨酸 (sFcs) 可以预测流感疫苗接种后疫苗反应的质量.
- sFc通过结合CD23,上调抑制FcγRIIB和增加BCR信号值来促进BCR亲和性选择.
- 用sFc-HA ICs进行免疫接种产生了针对保存的HA茎的保护性,高亲和性IgG,这表明了广泛的中和潜力.
结论:
- 已经确定了一种涉及sFcs和FcR相互作用的抗体亲和力成熟的新型内源途径.
- 通过调节FcR信号值,sFc在选择高亲和度B细胞受体方面发挥着至关重要的作用.
- 用化免疫复合物的向免疫是开发广泛中和抗体的有希望的策略.
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