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, USA.
Journal of virology
|March 25, 2025
概括
病毒印记塑造了免疫反应. 过去的SARS-CoV-2暴露将抗体引导到特定的尖端区域,在印记成人和新感染的婴儿之间存在差异,影响病毒演变.
科学领域:
- 免疫学 免疫学 免疫学
- 病毒学 病毒学
- 遗传学 遗传学是一种遗传学.
背景情况:
- 对病毒感染的免疫反应受到先前暴露的影响,这种现象被称为印记.
- 大多数人已经通过疫苗接种或感染受到早期严重急性呼吸系统综合征冠状病毒2 (SARS-CoV-2) 菌株的印记.
- 随后感染较新的SARS-CoV-2菌株往往会增加最初印记菌株的抗体.
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,与近期变种初级感染的婴儿相比.
- 调查不同SARS-CoV-2暴露史如何影响病毒尖端蛋白的抗体向.
主要方法:
- 利用基于伪病毒的深度突变扫描来评估尖端突变对中和的影响.
- 由原始疫苗打印的成年人/儿童和患有初级XBB*变种感染的婴儿的血清抗体测量中和.
- 在不同暴露队伍中比较抗体中和特异性.
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*感染的婴儿表现出中和活性,主要针对尖端N终端域.
- 婴儿的二次XBB*疫苗接种将中和活性转移到RBD,但与成年人打印不同的地方.
结论:
- 通过中和抗体,SARS-CoV-2暴露史显著地决定了病毒峰值的目标区域.
- 在婴儿和印记个体中观察到的明显的中和性简介突出显示了抗体免疫的异质性.
- 基于暴露史的免疫反应的这种变化可能会影响SARS-CoV-2的进化轨迹.
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