来自巴西南部的COVID-19接种疫苗的个体中的细胞免疫记忆T细胞和IL15RA基因多态性
Grazielle Motta Rodrigues1,2, Pâmela Portela da Silva3, Maria Clara de Freitas Pinho2
1Postgraduate Program in Medical Sciences, Federal University of Rio Grande do Sul, Porto Alegre 90010-150, Brazil.
对SARS-CoV-2的细胞免疫记忆随着时间的推移而减弱,这表明需要COVID-19疫苗增剂剂量,以保持对变种的保护并确保持久的免疫力.
科学领域:
- 免疫学 免疫学 免疫学
- 疫苗学 疫苗学 疫苗学
- 遗传学 遗传学 是一个
背景情况:
- 由于COVID-19大流行,需要开发SARS-CoV-2疫苗,以提高人群免疫力.
- 建立持久的细胞免疫记忆对于持续的保护至关重要.
研究的目的:
- 评估针对SARS-CoV-2接种疫苗的个体的细胞免疫记忆.
- 为了研究IL15RA基因rs2228059多态化对免疫记忆的影响.
- 评估与不同疫苗接种方案和时间有关的免疫记忆.
主要方法:
- 流细胞计用于分析T细胞子集 (CD3 +,CD4 +,CD8 +) 作为对SARS-CoV-2刺激的反应.
- 在IL15RA基因中进行了rs2228059多态的基因定型.
- 参与者接受了各种COVID-19疫苗接种方案.
主要成果:
- 在接种疫苗后观察到记忆T细胞子集 (CD3 +,CD4 +,CD8 +) 的下降.
- 大多数参与者在研究前两年内接受了最后一剂疫苗.
- 在一个特定的疫苗接种组 (ChAdOx1/ChAdOx1/BNT162b2) 中,rs2228059的TT基因型与天真T细胞子集的增加有关.
结论:
- 记忆T细胞的逐渐减少凸显了增强剂量的重要性.
- 增强剂量对于维持细胞免疫保护对新出现的SARS-CoV-2变种至关重要.
- 维持细胞免疫记忆需要持续的疫苗接种策略.
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