Monogenic TCRβ Assembly and Expression Are Paramount for Uniform Antigen Receptor Specificity of Individual αβ T Lymphocytes.

Monogenic TCRβ Assembly and Expression Are Paramount for Uniform Antigen Receptor Specificity of Individual αβ T Lymphocytes.
复制标题

单基因TCRβ的组装和表达对于单个αβ T淋巴细胞的统一抗原受体特异性至关重要。

DOI:
10.4049/jimmunol.2200176
复制
发表时间:
2022-07-01
期刊:
Journal of immunology (Baltimore, Md. : 1950)
影响因子:
--
通讯作者:
--
中科院分区:
其他
文献类型:
--
作者:

文献摘要

参考文献

相似文献

单个T细胞和B细胞显示独特的统一特异性的Ag受体的能力是获得性免疫的分子基础。大多数αβT细胞通过在TcRβ和TcRα基因座的一个等位基因拷贝上组装框内基因来实现一致的特异性,而另一些细胞则阻止这两个等位基因的TcRα蛋白进入TCRs。对表达TcR蛋白的小鼠的分析表明,TcR蛋白配对限制实现了表达两种类型TcRβ蛋白的细胞的一致特异性。然而,这种机制是否在每个双TCRβ细胞表达一组大量不同TCRβ蛋白的生理背景下仍是一个悬而未决的问题,主要是因为有一小部分细胞携带两个框内TCRβ基因。为了解决这个问题,我们在一个新的小鼠品系中灭活了TCRα基因的一个等位拷贝,该品系在提高的细胞比例中组装了两个框内TCRβ基因。这种遗传操作对显示多种类型αββ的细胞的频率没有影响,但增加了显示TCR TCR蛋白的细胞的代表性,从而产生更高表达的TCR。我们的数据表明,一些TcRβ蛋白与TcRα蛋白表现出不同的功能配对,但这些限制对确保表达两种类型TcRβ蛋白的细胞的一致特异性的贡献可以忽略不计。因此,我们得出结论,调控TcRβ基因在单个细胞中的单基因组装和表达的机制对于αβT淋巴细胞的一致特异性至关重要。
The ability of individual T and B cells to display Ag receptors of unique uniform specificity is the molecular basis of adaptive immunity. Most αβ T cells achieve uniform specificity by assembling in-frame genes on only one allelic copy of TCRβ and TCRα loci, while others prevent incorporation of TCRα protein from both alleles into TCRs. Analysis of mice expressing TCR proteins from a restricted combination of transgenes showed that TCR protein pairing restrictions achieve uniform specificity of cells expressing two types of TCRβ proteins. However, whether this mechanism operates in the physiological context where each dual-TCRβ cell expresses one set of a vast number of different TCRβ proteins remains an open question, largely because there is a low, but significant, portion of cells carrying two in-frame TCRβ genes. To resolve this issue, we inactivated one allelic copy of the TCRα locus in a new mouse strain that assembles two in-frame TCRβ genes in an elevated fraction of cells. This genetic manipulation has no effect on the frequency of cells that display multiple types of αβ TCRs yet increases the representation of cells displaying TCRβ proteins that generate more highly expressed TCRs. Our data demonstrate that some TCRβ proteins exhibit differential functional pairing with TCRα proteins but these restrictions have negligible contribution for ensuring uniform specificity of cells that express two types of TCRβ proteins. Therefore, we conclude that mechanisms governing monogenic assembly and expression of TCRβ genes in individual cells are paramount for uniform specificity of αβ T lymphocytes.
人T淋巴细胞上的双T细胞受体β链表达。
DOI: 10.1084/jem.181.4.1391
发表时间: 1995-04-01
影响因子: 15.3
作者:
Davodeau, Francois;Peyrat, Marie-Alix;Romagne, Francois;Necker, Antje;Hallet, Marie-Martine;Vie, Henri;Bonneville, Marc
通讯作者: Bonneville, Marc
DOI: 10.4049/jimmunol.1700406
发表时间: 2017-07-01
期刊: Journal of immunology (Baltimore, Md. : 1950)
影响因子: --
作者:
Schuldt NJ;Auger JL;Spanier JA;Martinov T;Breed ER;Fife BT;Hogquist KA;Binstadt BA
通讯作者: Binstadt BA
DOI: 10.1084/jem.174.4.815
发表时间: 1991-10-01
期刊: The Journal of experimental medicine
影响因子: --
作者:
van Meerwijk JP;Romagnoli P;Iglesias A;Bluethmann H;Steinmetz M
通讯作者: Steinmetz M
DOI: 10.1038/ni.2938
发表时间: 2014-09
期刊: Nature immunology
影响因子: 30.5
作者:
通讯作者: --
DOI: 10.1073/pnas.93.17.9102
发表时间: 1996-08-20
影响因子: 11.1
作者:
Zal, T;Weiss, S;Stockinger, B
通讯作者: Stockinger, B