通过降低CD8的贡献来选择具有高亲和力对自身MHC的T细胞受体
L A Sherman1, S V Hesse, M J Irwin
1Department of Immunology, Scripps Research Institute, La Jolla, CA 92037.
概括
改变与CD8核受体的T细胞相互作用可以防止具有高自主主要基因相容复合体 (MHC) 亲和力的T细胞的消除. 这种策略产生识别自我MHC加低亲和力的抗原的T细胞,有助于免疫耐受性.
科学领域:
- 免疫学 免疫学 免疫学
- T细胞生物学T细胞生物学
- 胸膜选择选择 胸膜选择
背景情况:
- 胸腺T细胞的发育涉及对自我主要基因相容性复合体 (MHC) 识别的积极选择和对高亲缘关系相互作用的负面选择.
- T细胞受体 (TCR) 和CD8核受体都对T细胞与MHC I类分子相互作用的亲和性有所贡献.
研究的目的:
- 调查降低CD8核受体亲和度是否可以允许具有高自我MHC亲和度的T细胞在负选择中存活.
- 为了确定通过改性选择过程生成的T细胞的特征.
主要方法:
- 产生具有修改的CD8核受体亲和力的T细胞.
- 评估T细胞与自身MHC和自身MHC加抗原的相互作用.
主要成果:
- 降低CD8核受体亲和力使具有高亲和力自MHC的T细胞能够逃脱负面选择.
- 这些生成的T细胞表现出自我MHC加抗原的低亲和度识别.
结论:
- 调节CD8核受体亲和力是一种可行的策略,可以控制胆髓中的T细胞选择.
- 这种方法可以导致具有潜在更安全的自我反应特征的T细胞的发展,有助于免疫耐受性.
相关概念视频
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