在重复接种mRNA-1273的SARS-CoV-2疫苗后,IgG4中和和持续的总IgG Fc-Effector功能
Paulina Kaplonek1, Harry Bertera1, Diana W Lee1
1Moderna, Inc, 325 Binney Street, Cambridge, MA, 02142, USA.
Infectious diseases and therapy
|February 1, 2026
概括
SARS-CoV-2 mRNA疫苗诱导强大的抗体反应,包括增加的免疫球蛋白G4 (IgG4) 抗体. 这些IgG4抗体增强病毒中和,并且在Moderna mRNA-1273接种疫苗后不会阻碍整体免疫功能.
科学领域:
- 免疫学 免疫学 免疫学
- 疫苗学 疫苗学 疫苗学
- 病毒学 病毒学
背景情况:
- SARS-CoV-2 mRNA 疫苗产生各种抗体,包括免疫球蛋白 G (IgG) 亚类.
- 重复注射mRNA疫苗导致抗原特异性IgG4抗体的增加.
- 在SARS-CoV-2 mRNA疫苗免疫力中IgG4抗体的功能作用尚未完全理解.
研究的目的:
- 为了研究Moderna mRNA-1273疫苗接种后IgG亚类反应的动态.
- 评估接种疫苗后的IgG Fc介导功能和中和能力.
- 为了确定高IgG4水平对疫苗诱导的整体免疫力的影响.
主要方法:
- 追踪IgG亚类水平,Fc介导功能和中和.
- 在接种两剂或三剂Moderna mRNA-1273疫苗后对抗体反应的分析.
- 对健康的成年参与者的评估.
主要成果:
- 观察到强大的IgG1和IgG3反应,在重复剂量后IgG4显著增加.
- 升高的IgG4水平并没有损害Fc-effector功能 (例如,细胞化,补体沉积).
- IgG4抗体表现出增强的亲和力和强大的中和能力,补充IgG1反应.
结论:
- 在mRNA-1273疫苗接种后增加的IgG4抗体水平不会对抗Fc介导的效应机制.
- 现代mRNA-1273诱导多个子类抗体反应,维持抗病毒功能.
- 这项研究表明,尽管IgG4反应升高,但抗病毒能力仍然存在.
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