一种全面的方法,用于对被召回的人类记忆B细胞和T细胞的表型和功能特征,这些细胞是针对疫苗抗原的特异性
Czdari Lee1, Imtisal Imran1, Sara Thomas1
1Florida Atlantic University, Charles E. Schmidt College of Medicine, Department of Medicine, 777 Glades Road, PO Box 3091, Boca Raton, FL 33431, USA.
这项研究表明,R848,而不是CpG,在扩大记忆B细胞和抗体生产方面优越. 疫苗抗原单独可以召回记忆T细胞,提供评估疫苗有效性的新方法.
科学领域:
- 免疫学 免疫学 免疫学
- 疫苗学 疫苗学 疫苗学
背景情况:
- 目前的疫苗有效性测定集中在抗体水平上,忽视了记忆B细胞和T细胞.
- 具有细胞因子的多克隆激活剂,如CpG和R848,可以召回记忆B细胞.
- 活衰减病毒可以刺激记忆T细胞,但激活剂效应和抗原特异性回忆仍然不清楚.
研究的目的:
- 为了比较两个B细胞多克隆激活剂在诱导记忆细胞过渡到抗体分泌细胞 (ASCs) 的有效性.
- 评估疫苗抗原对记忆T细胞的召回到效应子集.
- 通过将抗体水平与记忆细胞相关联,建立一种量化疫苗有效性的方法.
主要方法:
- 对比CpG/IL-6/IL-15和R848/IL-2用于从PBMC中召回B细胞到ASC的记忆B细胞.
- 在用疫苗抗原刺激时,评估记忆T细胞过渡到效应子集.
- 量化总和抗原特异性IgG生产和特征T细胞子集.
主要成果:
- 两种CpG和R848组合都诱导了记忆B细胞分化成ASC.
- CpG扩展了原始和非类切换B细胞;R848扩展了类切换记忆B细胞,血细胞和血细胞.
- R848治疗导致了较高的总和抗原特异性IgG产生.
- 疫苗抗原单独召回了抗原特异性记忆T细胞,主要是产生IFN-γ的CD4T细胞和产生TNF-β的CD8T细胞.
结论:
- 在诱导抗体产生和扩大相关B细胞子集方面,R848比CpG更有效.
- 疫苗抗原足以召回记忆T细胞,表明它们在适应性免疫中的作用.
- 这项研究为选择检测淋巴细胞子集和量化疫苗有效性的方法提供了一个框架.
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