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.
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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
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发表时间:
2022-07-01
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影响因子:
--
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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.
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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
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