相关实验视频
Updated: May 22, 2025

08:04
Overlapping Peptide Library to Map Qa-1 Epitopes in a Protein
Published on: December 20, 2017
6.8K
QRICH1通过CARD11信号体通过CD8+T细胞激活的细胞内检查点进行介导
Nicole M Carter1, Wihib D Hankore1, Yong-Kang Yang1
1Department of Biological Chemistry and Institute for Cell Engineering, Johns Hopkins University School of Medicine, Baltimore, MD, USA.
Science immunology
|March 14, 2025
概括
富含谷氨胺的蛋白1 (QRICH1) 通过调节卡斯帕斯招募域含蛋白11 (CARD11) 信号传递,作为 CD8+ T 细胞激活的检查点. 这一发现提升了对免疫反应微调的理解.
科学领域:
- 免疫学 免疫学 免疫学
- 分子生物学分子生物学
- 细胞信号传递 细胞信号传递
背景情况:
- 淋巴细胞激活依赖于复杂的信号通路,涉及支架和负调节剂.
- 含有卡斯帕酶招募域的蛋白质11 (CARD11) 是一个关键的支架蛋白,它调解T细胞受体 (TCR),向NF-κB,JNK,mTOR和Akt等下游通路发送信号.
研究的目的:
- 为了识别T细胞激活中CARD11信号传递的新型调节者.
- 阐明富含谷氨胺蛋白1 (QRICH1) 作为 CD8+ T 细胞激活的细胞内检查点的作用.
主要方法:
- 研究了QRICH1在TCR参与后与CARD11的相互作用.
- 分析了QRICH1对NF-κB信号传递和CD8+T细胞功能 (激活,增殖,效应器状态) 的影响.
- 描述了QRICH1内部调节其功能的分子内相互作用.
主要成果:
- QRICH1被确定为CARD11信号的负调节者,特别抑制NF-κB激活.
- 在TCR刺激时,QRICH1与CARD11结合,其结合由分子内域相互作用调节.
- 通过调节基因表达,QRICH1对抗原诱导的CD8+T细胞激活,增殖和效应因子分化进行关键控制.
结论:
- QRICH1 作为抗原受体信号传递中的细胞内检查点,微调 CD8+ T 细胞反应.
- 这项研究揭示了QRICH1作为控制T细胞效应器输出的信号电路的新型组件.
相关概念视频
The Spindle Assembly Checkpoint
3.1K
The spindle assembly checkpoint is a molecular surveillance mechanism ensuring the fidelity of chromosome segregation during anaphase. The checkpoint monitors the completion of all the prerequisite steps before chromosome segregation to determine whether the segregation process should proceed or be delayed.
Many proteins function together to control the spindle assembly checkpoint. Mutations affecting these proteins may allow cells to proceed into anaphase prematurely, resulting in the...
Many proteins function together to control the spindle assembly checkpoint. Mutations affecting these proteins may allow cells to proceed into anaphase prematurely, resulting in the...
3.1K
The Cell Cycle Control System
2.5K
The cell cycle regulation directs how a cell proceeds from one phase to the next and begins mitosis. The cell cycle control system includes intracellular regulatory molecules and external triggers. They provide "stop" or "advance" signals and operate at specific cell cycle stages termed checkpoints to ensure that a particular process is completed before the cell advances to the next phase.
Cyclins and cyclin-dependent kinases (Cdks) are the primary cell cycle regulators and...
Cyclins and cyclin-dependent kinases (Cdks) are the primary cell cycle regulators and...
2.5K
T Cell Activation and Clonal Selection
620
T cells are integral to our adaptive immune system, recognizing and effectively responding to foreign antigens. T cell activation and clonal selection are pivotal in orchestrating this immune response. This article elucidates these mechanisms, detailing the roles of cluster of differentiation (CD) markers, major histocompatibility complex (MHC) molecules, costimulatory signals, and the process of clonal selection.
Naive T cells that have not yet encountered an antigen express two primary CD...
Naive T cells that have not yet encountered an antigen express two primary CD...
620
Inhibition of Cdk Activity
4.6K
The orderly progression of the cell cycle depends on the activation of Cdk protein by binding to its cyclin partner. However, the cell cycle must be restricted when undergoing abnormal changes. Most cancers correlate to the deregulated cell cycle, and since Cdks are a central component of the cell cycle, Cdk inhibitors are extensively studied to develop anticancer agents. For instance, cyclin D associates with several Cdks, such as Cdk 4/6, to form an active complex. The cyclin D-Cdk4/6 complex...
4.6K
Negative Regulator Molecules
35.1K
Positive regulators allow a cell to advance through cell cycle checkpoints. Negative regulators have an equally important role as they terminate a cell’s progression through the cell cycle—or pause it—until the cell meets specific criteria.
35.1K
Cytotoxic T Cells-mediated Immune Response
823
Cytotoxic T cells are a vital component of the immune system. They have the remarkable ability to identify and target antigens on infected or abnormal cells. These antigens often originate from intracellular pathogens such as viruses or abnormal proteins cancer cells produce.
Immunological surveillance is the ability of immune cells to monitor and eliminate infected cells with intracellular pathogens, neoplastically transformed cells, and cells with non-self antigens. Cytotoxic T cells and NK...
Immunological surveillance is the ability of immune cells to monitor and eliminate infected cells with intracellular pathogens, neoplastically transformed cells, and cells with non-self antigens. Cytotoxic T cells and NK...
823

