相关实验视频
Updated: Jan 11, 2026

Visualizing Antigen Specific CD4+ T Cells using MHC Class II Tetramers
Published on: March 6, 2009
CD4+粘膜相关的不变T细胞表达高度多样化的T细胞受体
Rimanpreet Kaur1,2,3, Danielle Xie1,2,3, Atul Pradhan1,2,3
1Division of Infectious Diseases, Department of Medicine, Renaissance School of Medicine at Stony Brook University, Stony Brook, NY, USA.
粘膜关联的不变T细胞 (MAIT) 对于免疫至关重要,在CD4+子集中显示出多样化的T细胞受体 (TCR) 使用. 这与CD8+MAIT细胞形成鲜明对比,表明其功能多样化,并可能产生新的MR1连接体相互作用.
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
- 这是一种与生俱来的类似免疫力.
背景情况:
- 粘膜关联的不变T细胞 (MAIT) 是具有免疫功能保留的与生俱来的类似淋巴细胞.
- MAIT细胞通常表达CD8αβ+T细胞受体 (TCR),识别MR1呈现的微生物代谢物.
- 较少了解CD4+MAIT细胞子集,但可能具有不同的功能能力.
研究的目的:
- 为了研究CD4+MAIT细胞的T细胞受体 (TCR) 谱.
- 描述CD4+MAIT细胞使用的TCR的多样性和特异性.
- 为了比较CD4+和CD8+MAIT细胞子集之间的TCR使用情况.
主要方法:
- 对MR1-5-OP-RU-四酶反应性T细胞进行无偏的单细胞TCR测序.
- 来自两个独立数据集的VDJ基因序列的分析.
- 在体外培养的T细胞与白素-2和Mycobacterium结核病.
主要成果:
- CD4+MAIT细胞表现出高度多样化的TCR谱,与正规的CD8+子集不同.
- 在CD4+MAIT细胞中确定了特定的TCR家族 (TRAV21,TRAV8,TRAV12) 和可变J段/CDR3α/TRBV序列.
- 在与IL-2和M.结核病进行体外培养后,MAIT细胞TCRs得到了丰富.
结论:
- 成熟的人类CD4+MAIT细胞与CD8+MAIT细胞相比,使用不同的TCR.
- 这种TCR多样性表明,除了正规的 рибофлавин代谢产物之外,还有其他抗原识别方法.
- 替代MR1配体可以选择CD4+MAIT细胞群,这意味着在免疫监测中发挥更广泛的作用.
更多相关视频
09:15Author Spotlight: Optimized Protocol for Detecting Antigen-Specific T Cells in Mouse Lungs Using Tetramers
Published on: July 19, 2024
08:11Assessing the Innate Sensing of HIV-1 Infected CD4+ T Cells by Plasmacytoid Dendritic Cells Using an Ex vivo Co-culture System.
Published on: September 1, 2015
相关概念视频
T Cell Activation and Clonal Selection
Naive T cells that have not yet encountered an antigen express two primary CD...
Diversity of Antigen Receptors
Before encountering any antigen, lymphocytes express these receptors. On B cells, the antigen receptor is a membrane-bound antibody molecule called BCR; on T cells, it is a T cell receptor or TCR. B and T cell receptors are composed of two...
Cytotoxic T Cells-mediated Immune Response
Immunological surveillance is the ability of immune cells to monitor and eliminate infected cells with intracellular pathogens, neoplastically transformed cells, and cells with non-self antigens. Cytotoxic T cells and NK...
T Cell Types and Functions
Th1 cells stimulate dendritic cells to express necessary co-stimulatory molecules on their surfaces for...
Antigens Involved in Adaptive Immunity
Complete Antigens
Complete antigens possess both immunogenicity and...