癌症新抗原的T细胞识别的结构基础和预测新表位细胞免疫性方面的影响
Roy A Mariuzza1,2, Daichao Wu3, Brian G Pierce1,2
1W.M. Keck Laboratory for Structural Biology, University of Maryland Institute for Bioscience and Biotechnology Research, Rockville, MD, United States.
Frontiers in immunology
|December 4, 2023
概括
了解T细胞如何识别癌症新抗原是采用细胞疗法 (ACT) 和癌症疫苗的关键. 结构研究表明,突变可以增强抗原呈现或被T细胞受体 (TCR) 直接检测到.
科学领域:
- 在瘤学瘤学.
- 免疫学 免疫学 免疫学
- 结构生物学 结构生物学
背景情况:
- 采用细胞疗法 (ACT) 利用瘤特异性T细胞进行癌症回归.
- T细胞的反应主要针对新抗原,这些新抗原是由癌症发育过程中自身抗原的突变引起的.
- 区分新抗原与自我抗原对于避免自身免疫至关重要,但对T细胞识别的精确要求尚未完全理解.
研究的目的:
- 审查关于T细胞受体 (TCR) 识别共享癌症新抗原的结构和生物物理研究.
- 探索免疫系统检测癌症突变的机制.
- 讨论TCR模仿抗体和预测新表位细胞免疫性方面的计算进步.
主要方法:
- 对结构和生物物理研究的审查,重点是特定瘤新抗原的TCR识别 (例如,p53R175H,KRASG12D).
- 分析机制,包括增强的-MHC结合和与突变的直接/间接TCR相互作用.
- 对TCR模仿抗体和用于新表位预测的计算方法的审查.
主要成果:
- 致癌突变可以通过增强-MHC结合来改善抗原呈现.
- 突变通过直接的TCR相互作用或间接机制来识别,并不总是需要与突变残留物直接接触.
- 模仿TCR的抗体为针对癌症新抗原提供了TCR的替代方案.
结论:
- 结构性见解对于理解TCR-新抗原相互作用和设计有效的癌症免疫疗法至关重要.
- 直接和间接的识别机制都有助于T细胞对癌症新抗原的反应.
- 基于结构数据的计算预测的进步,有望改善癌症疫苗和ACT的新位选择.
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