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易斯X的Sialyl定义了小鼠中的一个活性和功能调节性T细胞亚群

Kanae Ohishi¹, Asaki Ishikura¹, Shogo Nishida¹

¹Laboratory of Microbiology and Immunology, Graduate School of Pharmaceutical Sciences, Chiba University, Chiba, Japan.

Journal of immunology (Baltimore, Md. : 1950)

|April 19, 2024

概括

易斯X (sLex) 标识了小鼠中激活的调节性T细胞 (Tregs). 这些sLex阳性Tregs表现出增强的免疫抑制功能,对于控制炎症模型中的免疫反应至关重要.

科学领域:

免疫学免疫学免疫学
细胞生物学细胞生物学
在T细胞研究中.

背景情况:

调节性T细胞 (Tregs),特别是CD4+Foxp3+T细胞,通过其免疫抑制功能,对于维持免疫平衡至关重要.
已知四糖抗原Sialyl Lewis X (sLex) 参与白细胞贩运,并标志着人类高度差异化的Tregs.
然而,sLex在小鼠Tregs中的作用和意义在很大程度上仍未被探索.

研究的目的:

调查Sialyl Lewis X (sLex) 作为小鼠激活调节性T细胞 (Tregs) 标记物的功能意义.
确定sLex表达是否与小鼠Tregs中增强的免疫抑制能力和功能标志物相关.

主要方法:

利用小鼠的接触过敏模型来评估激活的Tregs上的sLex表达.
分析了Treg功能标记物 (Foxp3,CD25,CD103,CD39,granzyme B) 与sLex表达的同时.
在sLex阳性 (sLex+) 和sLex阴性 (sLex-) Tregs上进行RNA测序,以比较基因表达特征.
进行了体外抑制试验和体内局部Treg注射以评估免疫抑制功效.

主要成果:

在接触过敏模型中,小鼠Tregs在激活时强烈表达sLex,这与功能Treg标志物的水平升高相吻合.
RNA测序显示,与sLex-Tregs相比,sLex+Tregs表现出与Treg功能相关的基因的更高表达.
在体外和体外研究表明,sLex+ Tregs具有优越的抑制原始CD4+T细胞增殖和减少耳朵炎症的能力.

结论:

易斯Sialyl Lewis X (sLex) 作为小鼠激活和功能强大的免疫抑制调节T细胞 (Tregs) 的可靠表面标记物.
这些发现强调sLex是识别和隔离功能Tregs的宝贵工具,可能有助于开发免疫调节疗法.

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