接种疫苗和感染儿童的SARS-CoV-2特异性粘膜免疫反应
Maria Giulia Conti1, Eva Piano Mortari2, Raffaella Nenna1
1Department of Maternal, Child Health and Urological Sciences, Sapienza University of Rome, Rome, Italy.
Frontiers in cellular and infection microbiology
|April 11, 2024
概括
与感染不同的是,COVID-19疫苗接种在儿童中引起了弱的粘膜免疫反应. 唾液IgA反应在感染和接种疫苗之间有所不同,这凸显了需要使用粘膜免疫激活疫苗的需要.
科学领域:
- 免疫学 免疫学 免疫学
- 病毒学 病毒学
- 儿科 儿科 儿科
背景情况:
- 肌肉内注射的COVID-19疫苗诱导强大的系统免疫力,但在成年人中具有有限的粘膜免疫力.
- 对于SARS-CoV-2感染或儿童接种疫苗的粘膜免疫反应仍然不太了解.
研究的目的:
- 为了研究和比较唾液粘膜对SARS-CoV-2感染和儿童疫苗接种的免疫反应.
- 根据唾液IgA.评估儿童未诊断的SARS-CoV-2感染的流行率.
- 引导开发增强粘膜免疫力的儿科疫苗.
主要方法:
- 对液免疫球蛋白A (IgA) 亚类 (IgA1和IgA2) 针对SARS-CoV-2受体结合域 (RBD) 的分析.
- 对未接种疫苗的儿童,接种疫苗的儿童和感染儿童的免疫反应进行比较.
- 在儿童中检测已存在的唾液IGA对抗SARS-CoV-2.
主要成果:
- 28%的儿童在接种疫苗之前表现出针对SARS-CoV-2的可检测的唾液IgA,这表明潜在的未被诊断的感染.
- 接种COVID-19疫苗导致唾液IgA1显著增加,但不是IgA2,准RBD.
- 与IgA1相比,感染SARS-CoV-2的儿童的唾液RBD-IgA2水平显著更高,表明感染诱导的粘膜反应更强.
结论:
- 与肌内疫苗接种相比,SARS-CoV-2感染在儿童中诱导了更具特异性和强大的粘膜免疫反应.
- 目前的疫苗接种策略可能需要加强,以有效地刺激儿科人口的粘膜免疫力.
- 对激活粘膜免疫力的疫苗技术的进一步研究对于对呼吸道病毒的全面保护至关重要.
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