来自自然疟疾感染的非典型记忆B细胞产生了针对Plasmodium vivax变体的广泛中和抗体
Piyawan Kochayoo1, Saya Moriyama2, Ryutaro Kotaki2
1Department of Clinical Microbiology and Applied Technology, Faculty of Medical Technology, Mahidol University, Bangkok, Thailand.
PLoS pathogens
|January 23, 2025
概括
不典型的记忆B细胞 (aMBCs) 特定于P. vivax杜菲结合蛋白II (PvDBPII) 在疟疾感染期间发展并持续存在. 这些细胞产生广泛中和的抗体,这表明它们在抗疟疾的保护性免疫力中发挥着作用.
科学领域:
- 免疫学 免疫学 免疫学
- 传染性疾病 传染性疾病
- 疟疾学 疟疾学
背景情况:
- 在暴露于疟疾的个体中观察到非典型的记忆B细胞 (aMBC).
- 保护性免疫中P.vivax特异性aMBCs的生成和功能尚不清楚.
研究的目的:
- 调查自然感染后P.vivax特异性aMBCs的发展,持久性和抗体产生能力.
- 确定这些aMBC是否可以产生对P. vivax杜菲结合蛋白II (PvDBPII) 的中和抗体.
主要方法:
- 生产P. vivax杜菲结合蛋白II (PvDBPII) 探针,以检测特定的aMBCs.
- 培养单个aMBCs以评估分泌的IgG结合和中和活动.
- 分析B细胞受体 (BCR) 基因使用率,体质突变 (SHM) 率和CDR3长度.
主要成果:
- 在疟疾期间引起了P. vivax特异性的aMBCs,并持续到恢复阶段.
- 一些aMBC衍生克隆产生了高水平的抗PvDBPII IgG,与经典MBC相比.
- 特定的aMBC克隆 (A1F12,B4E11) 产生了针对PvDBPII变异的广泛中和抗体,具有独特的IGHV基因使用.
结论:
- P. vivax感染诱导P. vivax特有的aMBCs的发展和持续.
- 这些aMBCs有助于产生抗疟疾的保护性中和抗体.
- aMBCs的积累可能对疟疾的幽默性免疫反应至关重要.
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