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IL-12和IL-23受体共享的结构基础揭示了对T细胞与NK细胞形成作用的通道
Caleb R Glassman1, Yamuna Kalyani Mathiharan2, Kevin M Jude3
1Program in Immunology, Stanford University School of Medicine, Stanford, CA 94305, USA; Departments of Molecular and Cellular Physiology and Structural Biology, Stanford University School of Medicine, Stanford, CA 94305, USA.
Cell
|February 19, 2021
概括
研究人员设计了新的IL-12部分激动剂,可以选择性地激活CD8+T细胞,同时不影响NK细胞. 这些向性疗法显示出抗瘤免疫力有望降低毒性.
科学领域:
- 免疫学
- 结构生物学
- 生物化学
背景情况:
- 干白素-12 (IL-12) 和干白素-23 (IL-23) 是调节淋巴细胞反应的关键细胞因子.
- 这两种细胞因子共用IL-12受体β1 (IL-12Rβ1) 作为信号的子单元.
- 了解它们的受体相互作用是治疗发展的关键.
研究的目的:
- 阐明IL-12和IL-23受体共享的结构基础.
- 设计基于IL-12的新疗法,以提高安全性和有效性.
- 调查针对共享IL-12Rβ1/p40接口的功能后果.
主要方法:
- 确定IL-23受体复合物的晶体结构.
- 对IL-12和IL-23受体复合物的冷电子显微镜 (冷EM).
- 对IL-12部分激动剂的设计和体外/体内测试.
主要成果:
- 揭示了IL-12和IL-23受体综合体的非正规拓,突出了IL-12Rβ1与p40子单元的直接接触.
- 开发出部分IL-12激动剂,可保持CD8+T细胞的IFNγ诱导,但降低NK细胞的细胞因子产生.
- 证明这些部分激动剂在体内引起抗瘤免疫力,而没有NK细胞介导的毒性.
结论:
- 通过IL-12家族细胞因子共享受体的结构机制提供了蛋白质接口工程的蓝图.
- 向共享的IL-12Rβ1/ p40接口可使细胞偏差型细胞因子激活剂的发展.
- 这种方法具有创造更安全,更有效的免疫疗法的巨大潜力.
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