反侧面第二剂改善了对2剂量mRNA疫苗接种方案的抗体反应
Sedigheh Fazli1, Archana Thomas2, Abram E Estrada3
1Department of Occupational Health.
The Journal of clinical investigation
|January 16, 2024
概括
反侧面的COVID-19疫苗增强,或在相反的手臂中注射第二剂量,显著增强了抗体反应. 这种在以前未接触过的成年人中观察到的效应随着时间的推移而增加,并改善了抗体宽度和中和能力.
科学领域:
- 免疫学 免疫学 免疫学
- 疫苗学 疫苗学 疫苗学
- 传染性疾病 传染性疾病
背景情况:
- 疫苗注射部位经常被忽视,但可能会影响免疫反应.
- 了解影响疫苗有效性的因素对于公共卫生至关重要.
研究的目的:
- 评估疫苗接种臂位置是否会影响对COVID-19疫苗增剂的血清反应.
- 评估对抗体水平和中和的反侧面与异侧面增强的长期影响.
主要方法:
- 在接受COVID-19疫苗增剂的基线血清阴性成年人中测量了血清反应.
- 与初次接种疫苗相比,参与者在ipsilateral或contralateral臂中接受了增强剂.
- 抗体标位 (尖端特异性Ig,RBD特异性IgG,核囊特异性IgG和中和抗体) 在增强后的多个时间点被测量.
主要成果:
- 反侧面增强与更高的尖端特异性Ig和RBD特异性IgG相关,其效果持续长达14个月.
- 匹配的对显示出明显更高的结合和中和抗体标位,在以后的时间点 (W3和W4) 出现相反的增强.
- 针对SARS-CoV-2菌株 (D614G和Omicron) 的中和抗体标位在反侧增强时显著增加.
结论:
- 用BNT162b2 mRNA COVID-19疫苗进行的反侧增强显著增加了先前未暴露的成年人中的抗体量和范围.
- 观察到的抗体反应与逆侧增强的增加持续超过疫苗接种后3周.
- 接下来接种疫苗剂量的手臂选择可能是优化多剂量方案中的免疫反应的相关考虑因素.
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