年龄对由腺病毒诱导的自适应性免疫反应产生不同的影响,而不是针对COVID-19的mRNA疫苗
Beatrice Dallan1, Davide Proietto1, Martina De Laurentis1
1Department of Chemical, Pharmaceutical and Agricultural Sciences, University of Ferrara, Ferrara, Italy.
Nature aging
|June 25, 2024
概括
衰老显著削弱了对COVID-19疫苗,特别是mRNA疫苗的免疫反应. 然而,初级腺病毒疫苗之后的mRNA增强剂可以增强老年人的长期免疫记忆.
科学领域:
- 免疫学 免疫学 免疫学
- 疫苗学 疫苗学 疫苗学
- 老年学是一门学科.
背景情况:
- 严重急性呼吸系统综合征冠状病毒2 (SARS-CoV-2) 疫苗对于控制大流行至关重要.
- 老年人对严重的COVID-19具有更高的脆弱性,并且由于免疫衰变,可能会降低疫苗的疗效.
研究的目的:
- 研究免疫性对SARS-CoV-2尖端 (S) 蛋白特异性免疫反应在不同疫苗平台上的影响.
- 为了比较老年人的免疫记忆发育在各种初级疫苗接种和增强方案后.
主要方法:
- 评估S蛋白特异性IgG标位和CD4+/CD8+T细胞免疫力.
- 用BNT162b2或ChAdOx1-S接种疫苗的年龄分层参与者的比较,其次是BNT162b2或mRNA-1273增强剂.
- 对以前没有SARS-CoV-2感染的参与者的分析.
主要成果:
- 在最初用BNT162b2.2.接种疫苗的个体中,衰老显著降低了S蛋白特异性IgG标位和T细胞免疫力.
- 这种免疫力下降可能与老年人中原始淋巴细胞的枯竭有关.
- 主要的ChAdOx1-S接种接种后的BNT162b2或mRNA-1273增强产生了强大的和持续的免疫记忆.
结论:
- 疫苗平台的选择显著影响了老年人免疫记忆的发展.
- 一种主要的腺病毒疫苗,其次是mRNA增强剂,似乎是为在老年人中给予持续的COVID-19保护的最佳方案.
- 了解疫苗平台特异性免疫性对于优化弱势群体疫苗接种策略至关重要.
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