共享T细胞受体α谱的差异与病毒抗原的识别相关
Tiitus Lamponen1, Joonatan Mattila1, Nelli Heikkilä1,2
1Translational Immunology Research Program and Medicum, University of Helsinki, Helsinki, Finland.
分享的T细胞受体 (TCR) α链通常只有很少的核酸添加. 然而,识别简单疹病毒2 (HSV-2) 的TCRα序列显示出令人惊的变异性,这表明选择驱动的剧目多样性.
科学领域:
- 免疫学 免疫学 免疫学
- 分子生物学分子生物学
- 遗传学 是一个遗传学.
背景情况:
- 阿尔法-β T 细胞受体 (TCR) 谱系多样化,但相同的 TCR 链经常在个人之间共享.
- 这种共享的谱系主要包括TCR链,其中最少的非生殖细胞核酸添加,通常识别保存的病毒.
- 目前尚不清楚共享TCR链中核酸添加的程度是否与抗原特异性有所不同.
研究的目的:
- 为了研究参与病毒抗原识别的共享人类TCRα链.
- 分析这些TCR链的频率和特性,在前免疫和外周的曲目.
- 为了确定TCR核酸添加模式是否根据病毒特异性不同.
主要方法:
- 从已发布的数据库中检索共享的TCRα链序列.
- 分析了6个胸腺和10个血液样本的TCRα序列.
- 评估了在前免疫和外周反应谱中的频率和核酸添加特性.
主要成果:
- 大多数已识别的TCRα序列,除了简单疹病毒2 (HSV-2) 的序列外,呈现出高频率的生殖系重组和很少的核酸添加,与公众目录一致.
- 特定于HSV-2的TCRα序列显示出双模分布:一组具有众多核酸插入,而另一组则接近生殖线.
- 这一发现与观察到的其他病毒抗原的典型公共剧目特征形成鲜明对比.
结论:
- 发现了一种新的共享TCR谱系,可能是由免疫选择而不是融合重组产生的.
- 针对HSV-2的独特模式表明,独特的机制影响了针对特定病原体的TCR曲目生成.
- 需要进一步的研究来确认这些发现是否仅限于对HSV-2的免疫反应.
更多相关视频
08:48Generating De Novo Antigen-specific Human T Cell Receptors by Retroviral Transduction of Centric Hemichain
Published on: October 25, 2016
09:53Using X-ray Crystallography, Biophysics, and Functional Assays to Determine the Mechanisms Governing T-cell Receptor Recognition of Cancer Antigens
Published on: February 6, 2017
相关概念视频
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...
T Cell Activation and Clonal Selection
Naive T cells that have not yet encountered an antigen express two primary CD...
Immune Response Against Viral Pathogens
NK Cells
NK cells are a crucial part of our innate immune system, acting as the first line of defense against viral infections. These cells can recognize and kill infected cells without prior exposure to the virus, effectively slowing down the spread of infection. Additionally, NK cells produce proinflammatory...
Antigens Involved in Adaptive Immunity
Complete Antigens
Complete antigens possess both immunogenicity and...
Special Features of Adaptive Immunity
The primary cell types involved in adaptive immunity are T cells and B cells. Each type has a unique role in defending the body against pathogens. T cells are responsible for cell-mediated immunity. They identify and eliminate infected cells directly,...
Cross-reactivity
