LAG-3とT細胞受容体の近接は,T細胞活性化と自己免疫を抑制する
Jasper Du1, Hui Chen2, Jia You1
1Department of Pathology, New York University Grossman School of Medicine, New York, NY 10016, USA; The Laura and Isaac Perlmutter Cancer Center, New York University Langone Health, New York, NY 10016, USA.
Cell
|July 1, 2025
まとめ
LAG-3受容体をT細胞に標的にすることは,自己免疫疾患の治療の鍵です. 新しい双特定抗体はLAG-3の機能を強化し,T細胞受容体と結合し,病原性T細胞を効果的に抑制する.
科学分野:
- 免疫学
- 自己免疫 疾患
- T細胞生物学
背景:
- 自己免疫疾患における病原性T細胞を標的とした治療は依然として重要な課題である.
- 抑制チェックポイント受容体LAG-3はMHCクラスIIに結合しますが,その正確な機能は完全に理解されていません.
研究 の 目的:
- T細胞抑制におけるLAG-3機能のメカニズムを解明する.
- T細胞主導の自己免疫疾患に対する新しい免疫療法を開発する.
主な方法:
- LAG-3,T細胞受容体 (TCR) とCD3εの相互作用を調査した.
- Fc減弱されたLAG-3/TCR阻害バイスペシフィック抗体を開発した.
- 自己免疫疾患の臨床前マウスモデルでの治療効果の評価
主要な成果:
- MHCクラスIIだけでなく,LAG-3とTCRの相互作用は,CD4+T細胞抑制に極めて重要です.
- LAG-3は,細胞内FSALモチーフを通じてCD3ε/ Lck関連性を破壊する.
- 新型双特異抗体はCD4+とCD8+T細胞の両方を強力に抑制し,自己免疫症状を緩和します.
結論:
- LAG-3の機能は,TCRとの空間的接近性に大きく依存しています.
- LAG-3/TCR cis-proximityをターゲットにすると,自己免疫疾患の治療に有望な戦略が生まれます.
- このアプローチは,有効な治療法がない免疫療法に新たな可能性を秘めています.
関連する概念動画
T Cell Types and Functions
1.4K
When T cells with CD4 markers are activated, they give rise to two types of effector cells: helper T cells and regulatory T cells. Meanwhile, T cells with CD8 markers differentiate into effector cytotoxic T cells. The differentiation of CD4 T cells into helper T cell subsets, such as Th1, Th2, and Th17 cells, is dependent on the antigen type, antigen-presenting cell, and regulatory cytokines.
Th1 cells stimulate dendritic cells to express necessary co-stimulatory molecules on their surfaces for...
Th1 cells stimulate dendritic cells to express necessary co-stimulatory molecules on their surfaces for...
1.4K
T Cell Activation and Clonal Selection
5.6K
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...
5.6K
Cell-mediated Immune Responses
73.7K
Overview
73.7K
B Cell Activation and Differentiation
6.6K
The adaptive immune response, a sophisticated defense mechanism, relies on the activation and differentiation of B lymphocytes, or B cells. These processes enable our bodies to mount a tailored response against specific pathogens such as bacteria, free virus particles, toxins, and parasites.
When naive B cells encounter a specific antigen that can bind to the B cell receptor (BCR) on their surface, they undergo sensitization to respond to the antigen's presence. Sensitization begins with...
When naive B cells encounter a specific antigen that can bind to the B cell receptor (BCR) on their surface, they undergo sensitization to respond to the antigen's presence. Sensitization begins with...
6.6K
Special Features of Adaptive Immunity
1.1K
The adaptive immune system, a crucial component of the overall immune response, offers a highly specialized defense against pathogens. It involves specific cell types and features, enabling it to combat infections effectively and efficiently.
The primary cell types involved in adaptive immunity are T cells and B cells. Each type has a unique role in defending the body against pathogens. T cells are responsible for cell-mediated immunity. They identify and eliminate infected cells directly,...
The primary cell types involved in adaptive immunity are T cells and B cells. Each type has a unique role in defending the body against pathogens. T cells are responsible for cell-mediated immunity. They identify and eliminate infected cells directly,...
1.1K


