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丁素2A1对于γδ T细胞的抗原反应是必不可少的

Marc Rigau^1,2,3, Simone Ostrouska^4,5, Thomas S Fulford¹

¹Department of Microbiology and Immunology at the Peter Doherty Institute for Infection and Immunity, The University of Melbourne, Parkville, Victoria 3010, Australia.

Science (New York, N.Y.)

|January 11, 2020

概括

研究人员确定了Butyrophilin 2A1 (BTN2A1) 作为Vγ9⁺ T细胞受体 (TCR) 的关键配体. 这一发现促进了对马三角 (γδ) T 细胞激活的理解,并为新的免疫疗法开辟了道路.

科学领域:

免疫学
分子生物学
细胞生物学

背景情况:

马三角形 (γδ) T 细胞对于免疫防御至关重要.
人类γδT细胞主要使用Vγ9Vδ2+T细胞受体 (TCRs) 来检测病原体和癌症的质抗原 (pAgs).
这些γδTCR的特定分子标仍未确定.

研究的目的:

通过Vγ9Vδ2+γδ T细胞受体识别的分子配体.
阐明γδ T细胞对素抗原的识别机制.

主要方法:

蛋白质-配体结合测试以确定γδTCRs和潜在配体之间的相互作用.
细胞测试以评估T细胞激活对已识别的配体和原原的反应.
调查丁素家族成员在T细胞激活中的作用.

主要成果:

鉴定出Butyrophilin 2A1 (BTN2A1) 是Vγ9+ TCR γ链的一个直接结合伙伴.
BTN2A1与BTN3A1组合起作用,启动对质抗原的γδT细胞反应.
第二个配体相互作用,可能涉及BTN3A1和Vδ2TCR域,是完全激活T细胞所必需的.

结论:

该研究确定BTN2A1为Vγ9+γδT细胞的关键配体,澄清了它们激活的关键方面.
这一发现揭示了一种涉及双联体识别的抗原依赖T细胞激活的新机制.
这些结果为开发涉及光抗原识别的疾病的向性 γδ T 细胞免疫疗法提供了基础.

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