在仿真抗原受体 (CAR) T细胞中使用的CD28链在全球性疾病中表现出局部结构和构造性交换
Varvara Folimonova1, Xiang Chen1, Hitendra Negi1
1Protein Processing Section, Center for Structural Biology, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Frederick, MD, USA.
Communications biology
|August 31, 2024
概括
研究人员在癌症治疗中研究了CD28 CAR链 (CD28H) 结构. 生物物理方法揭示了短暂的局部结构,如螺旋,有助于灵活性,这可能会改善仿真抗原受体 (CAR) T 细胞治疗设计.
科学领域:
- 生物物理学的生物物理.
- 免疫学 免疫学 免疫学
- 结构生物学 结构生物学
背景情况:
- 化学抗原受体 (CAR) T细胞疗法对复发性/耐药性癌症具有前景.
- CARs通过链和跨膜区域将抗原识别与细胞内信号联系起来.
研究的目的:
- 在FDA批准的CD19 CAR中,描述CD28 CAR链 (CD28H) 的结构和动态.
- 了解链区域结构在CAR T细胞功能中的作用.
主要方法:
- 核重复效应光谱学 (NOESY) 用于检测局部结构动机.
- 应用生物物理方法来分析CD28H区域.
主要成果:
- 在CD28H中观察到过渡的局部结构,包括β-链到310-螺旋形状开关.
- 识别了松散形成的延伸几何和烯异构,有助于结构可塑性.
- 展示了一种检测内在无序系统中的短暂结构的方法.
结论:
- CD28H中的局部结构元素可能会影响识别,信号和域间距.
- 这些发现可能有助于设计未来的CAR T细胞疗法.
- 烯异构化是CAR中链区域可塑性的关键.
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