针对COVID-19疫苗接种IgG抗体反应的遗传决定因素
Shengzhe Bian1, Xinxin Guo1, Xilai Yang1
1School of Public Health (Shenzhen), Shenzhen Campus of Sun Yat-sen University, Shenzhen 518107, P.R. China; School of Public Health (Shenzhen), Sun Yat-sen University, Guangzhou 510006, P.R. China.
人类白细胞抗原 (HLA) II类等位基因的遗传变异显著影响抗体对COVID-19疫苗的反应. 这种HLA-DRB1*13:02等位基因为抗血清消极性提供保护,影响疫苗的疗效.
科学领域:
- 免疫遗传学 免疫遗传学
- 疫苗学 疫苗学 疫苗学
- 人类遗传学 人类遗传学
背景情况:
- 对SARS-CoV-2疫苗的幽默性免疫反应显示出显著的个体间变异性,影响了疫苗的疗效.
- 了解这种变化的遗传基础对于优化疫苗策略至关重要.
研究的目的:
- 为了确定与COVID-19疫苗接种后抗尖峰IgG抗体反应变异相关的遗传因素.
- 阐明这些基因影响疫苗免疫性背后的机制.
主要方法:
- 全基因组关联研究 (GWAS) 针对英国生物库参与者COVID-19疫苗接种后的抗尖峰IgG血清状态 (n > 54,000).
- 分析的重点是以前未被SARS-CoV-2感染的个体.
- 在使用不同的血清学试验的独立队列中复制发现.
主要成果:
- 在IgG血清状态和人类白细胞抗原 (HLA) 类II等位基因之间确定了显著的全基因组关联.
- 这种HLA-DRB1*13:02等位基因表现出对IgG血清消极性的强烈保护作用 (OR=0.75,p=2.34e-16).
- 这种效应与HLA-DRβ1中的Arg71Glu替代有关,它改变了结槽的静电状态,并显示了细胞类型的特异性.
结论:
- 构成性遗传因素,特别是HLAII类等位基因,在COVID-19疫苗反应的个体变异中发挥着重要作用.
- 研究结果表明,疫苗诱导的IgG反应和COVID-19易感性/严重性之间存在共同的遗传基础.
- 基因洞察对于为不同人群制定定制的疫苗接种策略至关重要.
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