通过结构指导工程扩大T细胞受体的全选择性
Vijaykumar Karuppiah1, Dhaval Sangani2, Lorraine Whaley2
1Immunocore Ltd, 92 Milton Park, Abingdon, Oxfordshire, OX14 4RY, UK. Vijaykumar.Karuppiah@immunocore.com.
Scientific reports
|November 5, 2024
概括
工程T细胞受体 (TCRs) 可以在不同的人类白细胞抗原 (HLA) 基因中识别相同的抗原. 这为更广泛的患者群体推进了基于TCR的疗法.
科学领域:
- 免疫学 免疫学 免疫学
- 分子生物学分子生物学
- 生物化学 生物化学
背景情况:
- T细胞受体 (TCR) 的特异性对免疫反应至关重要,并由与抗原和人类白细胞抗原 (HLA) 分子的相互作用决定.
- 目前基于TCR的治疗方法通常针对单个-HLA组合,限制了它们在不同患者群体中的适用性.
- 设计TCR来识别具有相同的多个HLA等位基因可以显著扩大治疗范围.
研究的目的:
- 设计T细胞受体 (TCRs),能够识别由不同的HLA等位基因 (HLA-A*03:01和HLA-A*11:01) 呈现的PRAME抗原.
- 通过结构引导的亲和力成熟来证明调节特定HLA等位基因的TCR亲和力的可行性.
- 为了验证工程TCR的功能有效性,在多个HLA环境中准单个.
主要方法:
- 结构引导的T细胞受体 (TCR) 的亲和力成熟.
- 工程TCR以准人类白细胞抗原 (HLA) 表面的特定残留物.
- 功能性T细胞测试以评估TCR亲和力和功效.
- 在HLA-A*03:01和HLA-A*11:01.01,研究了与PRAME (ELFSYLIEK) 结合的S2和S8的TCR.
主要成果:
- 通过向工程证明了通过向工程成功调节不同HLA等位基因的TCR亲和力.
- 一个工程TCR表现出与HLA-A*03:01和HLA-A*11:01.两种呈现的PRAME的相似亲和力和功效.
- 实现了开发具有全选择性识别能力的TCR的概念验证.
结论:
- 为选择性设计TCR对于开发适用于全球多样化人口的有效免疫疗法至关重要.
- 这种方法有望扩大符合TCR治疗条件的患者人群.
- 这项研究为设计具有更广泛HLA兼容性的TCR疗法提供了基础.
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