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记忆CD8T细胞区随着免疫学经验的增长而变大.
Vaiva Vezys1, Andrew Yates, Kerry A Casey
1Department of Microbiology and Center for Immunology, University of Minnesota, Minneapolis, Minnesota 55455, USA.
Nature
|November 14, 2008
概括
小鼠内存CD8T细胞的数量可以扩大以容纳新的细胞,挑战固定的免疫空间的想法. 这种扩张是由效应记忆CD8T细胞驱动的,可以保持现有的免疫力.
科学领域:
- 免疫学 免疫学 免疫学
- 疫苗学 疫苗学 疫苗学
- T细胞生物学T细胞生物学
背景情况:
- 记忆 CD8 T 细胞对于对病原体的适应性免疫是至关重要的.
- 人们假设记忆CD8 T细胞区是不灵活的,竞争空间有限.
- 这种不灵活性表明,新的记忆CD8T细胞可以取代先前存在的,可能会损害免疫力.
研究的目的:
- 为了研究记忆CD8T细胞区对接种疫苗的反应的适应性.
- 为了确定是否引入大量的新记忆CD8T细胞会影响现有的免疫记忆.
- 挑战在记忆中不灵活的免疫空间的范式 CD8 T 细胞.
主要方法:
- 在小鼠中开发了一种疫苗接种方案,以引入大量抗原特异性记忆CD8 T细胞.
- 在接种疫苗之前和之后,量化了CD8记忆T细胞的总数.
- 评估了对其他免疫细胞群 (CD4 T 细胞,B 细胞,天真 CD8 T 细胞) 和先前存在的记忆 CD8 T 细胞的影响.
主要成果:
- 记忆CD8 T细胞区间大小翻了一番,以容纳新引入的细胞.
- 这种扩张仅归因于效应记忆CD8T细胞的增加.
- CD4 T 细胞,B 细胞,天真 CD8 T 细胞和先前存在的记忆 CD8 T 细胞的数量基本上没有受到影响.
结论:
- 效应体内存CD8 T细胞区的尺寸是可适应的,并根据免疫学经验扩大.
- 引入丰富的新记忆CD8T细胞的疫苗可能不一定会消除先前存在的免疫力.
- 这一发现对疫苗设计和了解免疫记忆动态有重大影响.
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