当前位置: X-MOL 学术Eur. J. Immunol. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Contribution of the SYK Tyrosine kinase expression to human iNKT self-reactivity.
European Journal of Immunology ( IF 4.5 ) Pub Date : 2020-05-27 , DOI: 10.1002/eji.201948416
Jeanne Perroteau 1 , Benjamin Navet 1 , Marie-Claire Devilder 2 , Leslie Hesnard 1 , Emmanuel Scotet 1 , Laurent Gapin 3 , Xavier Saulquin 1 , Laetitia Gautreau-Rolland 1
Affiliation  

Invariant Natural Killer T (iNKT) cells are particular T lymphocytes at the frontier between innate and adaptative immunities. They participate in the elimination of pathogens or tumor cells, but also in the development of allergic reactions and autoimmune diseases. From their first descriptions, the phenomenon of self‐reactivity has been described. Indeed, they are able to recognize exogenous and endogenous lipids. However, the mechanisms underlying the self‐reactivity are still largely unknown, particularly in humans. Using a CD1d tetramer‐based sensitive immunomagnetic approach, we generated self‐reactive iNKT cell lines from blood circulating iNKT cells of healthy donors. Analysis of their functional characteristics in vitro showed that these cells recognized endogenous lipids presented by CD1d molecules through their TCR that do not correspond to α‐glycosylceramides. TCR sequencing and transcriptomic analysis of T cell clones revealed that a particular TCR signature and an expression of the SYK protein kinase were two mechanisms supporting human iNKT self‐reactivity. The SYK expression, strong in the most self‐reactive iNKT clones and variable in ex vivo isolated iNKT cells, seems to decrease the activation threshold of iNKT cells and increase their overall antigenic sensitivity. This study indicates that a modulation of the TCR intracellular signal contributes to iNKT self‐reactivity.

中文翻译:

SYK 酪氨酸激酶表达对人类 iNKT 自身反应性的贡献。

不变的自然杀伤 T (iNKT) 细胞是位于先天免疫和适应性免疫之间的特定 T 淋巴细胞。它们参与消除病原体或肿瘤细胞,但也参与过敏反应和自身免疫性疾病的发展。从他们的第一次描述中,已经描述了自反应现象。事实上,它们能够识别外源性和内源性脂质。然而,自我反应的潜在机制在很大程度上仍是未知的,尤其是在人类中。使用基于 CD1d 四聚体的敏感免疫磁性方法,我们从健康供体的血液循环 iNKT 细胞中生成了自反应 iNKT 细胞系。体外功能特征分析表明,这些细胞通过其 TCR 识别由 CD1d 分子呈递的内源性脂质,这些脂质与 α-糖基神经酰胺不对应。T 细胞克隆的 TCR 测序和转录组学分析表明,特定的 TCR 特征和 SYK 蛋白激酶的表达是支持人类 iNKT 自我反应的两种机制。SYK 表达在最具自身反应性的 iNKT 克隆中很强,在离体分离的 iNKT 细胞中可变,似乎降低了 iNKT 细胞的激活阈值并增加了它们的整体抗原敏感性。该研究表明,TCR 细胞内信号的调节有助于 iNKT 自身反应。T 细胞克隆的 TCR 测序和转录组学分析表明,特定的 TCR 特征和 SYK 蛋白激酶的表达是支持人类 iNKT 自我反应的两种机制。SYK 表达在最具自身反应性的 iNKT 克隆中很强,在离体分离的 iNKT 细胞中可变,似乎降低了 iNKT 细胞的激活阈值并增加了它们的整体抗原敏感性。该研究表明,TCR 细胞内信号的调节有助于 iNKT 自身反应。T 细胞克隆的 TCR 测序和转录组学分析表明,特定的 TCR 特征和 SYK 蛋白激酶的表达是支持人类 iNKT 自我反应的两种机制。SYK 表达在最具自身反应性的 iNKT 克隆中很强,在离体分离的 iNKT 细胞中可变,似乎降低了 iNKT 细胞的激活阈值并增加了它们的整体抗原敏感性。该研究表明,TCR 细胞内信号的调节有助于 iNKT 自身反应。
更新日期:2020-05-27
down
wechat
bug