最近感染的婴儿和免疫印记的个体之间,SARS-CoV-2 中和抗体的特异性显著不同
Bernadeta Dadonaite1, Allison R Burrell2, Jenni Logue3
1Basic Sciences Division and Computational Biology Program, Fred Hutchinson Cancer Center, Seattle, Washington, 98109, USA.
bioRxiv : the preprint server for biology
|February 3, 2025
概括
之前的SARS-CoV-2 (COVID-19) 暴露会影响免疫反应. 印记成年人准的是尖蛋白质.
科学领域:
- 免疫学 免疫学 免疫学
- 病毒学 病毒学
- 传染性疾病 传染性疾病
背景情况:
- 对病毒感染的免疫反应受到先前接触相关菌株的影响,这一过程称为印记.
- 由于早期的流行病感染和疫苗接种,SARS-CoV-2 (COVID-19) 疫苗的广泛印记发生了.
- 印记塑造了抗体反应,通常会从初始暴露中增加交叉反应性抗体.
研究的目的:
- 为了比较早期SARS-CoV-2菌株印记的个体中的中和抗体特异性,与最近XBB*变种的主要感染的婴儿相比.
- 为了研究不同SARS-CoV-2暴露史如何影响尖端蛋白的抗体向.
主要方法:
- 利用基于伪病毒的深度突变扫描来评估抗体中和.
- 由原始疫苗打印的成年人/儿童和患有初级XBB*感染的婴儿的血清抗体测量中和.
- 通过婴儿接种疫苗对二次XBB*峰值暴露之前和之后的抗体反应的比较.
主要成果:
- 印制个体的血清抗体主要向尖端受体结合域 (RBD).
- 患有初级XBB*感染的婴儿显示出中和活性,主要针对尖端N终端域 (NTD).
- 婴儿疫苗接种促进了对RBD的中和活性,但针对的地点不同于印记成年人.
结论:
- 不同的SARS-CoV-2暴露史导致中和抗体特异性的显著差异.
- 印记个体和初级感染的婴儿中的抗体反应显示了尖端蛋白域的分歧向.
- 这些中和特性的差异可能会影响SARS-CoV-2的未来演变.
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