相关实验视频
Updated: Jul 17, 2026

06:06
In Vitro Analysis of E3 Ubiquitin Ligase Function
Published on: May 14, 2021
通过阻碍信号动机的膜封存,激发LAG3免疫检查点功能
Yong Jiang1, Anran Dai2, Yuwei Huang3
1School of Life Science and Technology, ShanghaiTech University, Shanghai 201210, China; Key Laboratory of Multi-Cell Systems, Shanghai Institute of Biochemistry and Cell Biology, Center for Excellence in Molecular Cell Science, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Shanghai 200031, China.
Cell
|March 18, 2025
概括
淋巴细胞激活基因3 (LAG3) 通过非K48结合的多基因激活,从而增强其免疫抑制. 这种由治疗抗体向的机制为癌症免疫治疗提供了新的策略.
科学领域:
- 免疫学
- 分子生物学
- 癌症研究
背景情况:
- 淋巴细胞激活基因3 (LAG3) 是癌症免疫疗法的关键免疫检查点目标.
- 连接器激活后LAG3的确切机制尚不清楚.
研究的目的:
- 阐明LAG3在连接时的激活的分子机制.
- 调查在LAG3功能中的ubiquitination作用及其对癌症免疫治疗的影响.
主要方法:
- 使用生物化学测定和基于细胞的模型研究LAG3的无处不在.
- 研究了E3连接酶c-Cbl和Cbl-b在LAG3无处不在中的作用.
- 在体内分析了LAG3无化对抗瘤免疫力的影响.
- 与LAG3无处不在水平相关的治疗抗体效应.
主要成果:
- 激发非K48结合的LAG3多化,增强其抑制功能.
- 主体组织相容性复合物II类 (MHCII类) 和膜结合的纤维素样蛋白1 (FGL1) 诱导LAG3无处不在.
- 由c-Cbl和Cbl-b介导的化稳定了LAG3细胞质尾部,促进了信号传递.
- 在体内抑制抗瘤免疫力时,LAG3无处不在是必不可少的.
- 治疗性LAG3抗体抑制LAG3无化,与检查点阻断的有效性相关.
结论:
- 激活LAG3涉及非K48结合的多基化,促进其免疫抑制功能.
- 这种无处不在的机制对LAG3介导的T细胞抑制至关重要,并且是癌症免疫治疗的目标.
- 协同表达LAG3/CBL可以作为对LAG3阻断疗法的预测生物标志物.
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