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记忆B细胞为接种疫苗的脏移植接受者提供长期保护,防止SARS-CoV-2变种

Maxime Espi¹, Xavier Charmetant^1,2,3, Ilies Benotmane^4,5

¹CIRI, INSERM U1111, Université Claude Bernard Lyon I, CNRS UMR5308, Ecole Normale Supérieure de Lyon, Lyon, France.

Journal of medical virology

|November 12, 2024

概括

移植接受者 (KTRs) 显示对COVID-19变种的抗体保护减弱. 然而,细胞记忆B细胞提供持久的免疫力,对于这种脆弱人群的长期保护至关重要.

科学领域:

免疫学免疫学免疫学
移植移植移植移植
传染性疾病传染性疾病

背景情况:

移植接受者 (KTRs) 面临高的COVID-19风险.
疫苗接种提供短期的抗体保护,但其持续时间尚不清楚.
生殖中心反应对于KTRs的抗体生成至关重要.

研究的目的:

分析KTRs中对COVID-19疫苗接种的纵向免疫反应.
研究KTRs中对SARS-CoV-2变体的长期保护机制.
了解幽默记忆在KTRs疫苗疗效中的作用.

主要方法:

在33个KTR疫苗接种后免疫反应的纵向分析.
在274个KTR中对严重的COVID-19风险进行了回顾性研究.
评估抗体标位,中和能力和B细胞记忆反应.

主要成果:

抗体标位在KTR中迅速下降,其中2/3在几个月内失去对变种的中和能力.
尽管抗体减少,但KTRs中严重的COVID-19风险仍然很低.
针对保存的表位细胞的记忆B细胞持续存在,并在再次暴露时迅速产生抗体.

结论:

在KTRs中,幽默免疫有两个层:快速色的血清学和持久的细胞记忆.
记忆B细胞在KTRs中提供了对COVID-19变体的持续保护.
细胞记忆是长期疫苗有效性的关键,在像KTRs这样的免疫受损个体中.

关键词:

冠状病毒冠状病毒的新冠病毒.疾病控制疾病控制免疫反应的免疫反应.疫苗/疫苗菌株的使用情况病毒分类病毒分类

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