重新感染SARS-CoV-2与增加抗体宽度和针对不同sarbecovirus菌株的强度有关
Michelle Lilly1, Felicitas Ruiz1,2, William B Foreman3
1Human Biology Division, Fred Hutchinson Cancer Center, Seattle, Washington, USA.
mBio
|February 25, 2026
概括
接种疫苗的人重复感染SARS-CoV-2会产生更强大的抗体. 一个新发现的抗体中和了当前的变种和各种各样的萨尔贝科病毒,为未来的流行病提供了潜在的潜力.
科学领域:
- 病毒学 病毒学
- 免疫学 免疫学 免疫学
- 传染性疾病 传染性疾病
背景情况:
- 新出现的SARS-CoV-2变种表现出免疫逃生,限制了疫苗和感染诱导的保护.
- 对各种类型的沙贝科病毒的广泛中和抗体很少见,但在康复者血清中存在.
- 持续暴露于抗原可能会增强抗体的宽度和效力.
研究的目的:
- 为了调查重复的SARS-CoV-2感染是否增强抗体中和功效和范围.
- 从反复暴露于抗原的个体中识别和表征新型单克隆抗体 (mAbs).
- 评估已识别的mAbs对SARS-CoV-2变种和其他sarbecoviruses的治疗潜力.
主要方法:
- 在第一次和第二次SARS-CoV-2感染后,从个人中分离和比较mAbs.
- 对各种SARS-CoV-2变种和sarbecoviruses的中和效能和宽度的评估.
- 对mAb结合位点的表征,重点关注像受体结合域这样的保存区域.
主要成果:
- 在再次感染后分离的单克隆抗体与第一次感染时分离的抗体相比,显示出更好的中和效能和扩展范围.
- 一个特定的mAb,C68.490,准了一个保留的受体结合域区域.
- C68.490对SARS-CoV-2变种和来自不同类型的多种类型的sarbecoviruses表现出广泛的活动.
结论:
- 反复暴露于抗原,例如突破性感染,可以引起更有效的中和抗体.
- 已识别的广泛中和性抗体C68.490显示出对当前和未来的萨尔贝科病毒威胁的治疗用途的希望.
- 专注于多样化和反复暴露于抗原的个体是发现有力的治疗抗体的可行策略.
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