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相关概念视频

Tumor Immunotherapy01:27

Tumor Immunotherapy

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Immunotherapy is a treatment that boosts or manipulates the immune system to fight diseases, including cancer. For instance, by stimulating an immune response through vaccinations against viruses that cause cancers, like hepatitis B virus and human papillomavirus, these diseases can be prevented. Nonetheless, some cancer cells can avoid the immune system due to their rapid mutation and division. The immune response to many cancers involves three phases: elimination, equilibrium, and escape.
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T Cell Activation and Clonal Selection01:22

T Cell Activation and Clonal Selection

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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...
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Special Features of Adaptive Immunity01:20

Special Features of Adaptive Immunity

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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,...
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T Cell Types and Functions01:24

T Cell Types and Functions

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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...
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Cell-mediated Immune Responses01:40

Cell-mediated Immune Responses

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Overview
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Autocrine Signaling01:01

Autocrine Signaling

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Autocrine signaling is one of the many signaling mechanisms that function inside multicellular organisms to carry out intercellular communication. In this type of signaling mechanism, the same cell that secretes an extracellular signaling molecule also expresses the receptors to bind and respond to that signaling molecule.
Autocrine Signaling in Macrophages
Under normal physiological conditions, autocrine signaling is essential for maintaining homeostasis. This process is well characterized in...
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相关实验视频

Updated: Mar 4, 2026

A Syngeneic Mouse B-Cell Lymphoma Model for Pre-Clinical Evaluation of CD19 CAR T Cells
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T细胞受体信号传递和免疫耐受性:从自身免疫到癌症免疫

Atsushi Tanaka1,2, Shimon Sakaguchi1,3

  • 11Laboratory of Experimental Immunology, Immunology Frontier Research Center, The University of Osaka, Suita, Japan;

Annual review of immunology
|March 2, 2026
PubMed
概括

T细胞受体 (TCR) 信号强度决定T细胞的选择和激活,影响免疫缺陷和自身免疫力. 调节TCR信号为自身免疫性疾病和癌症免疫提供治疗潜力.

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Regulatory T cells: Therapeutic Potential for Treating Transplant Rejection and Type I Diabetes
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相关实验视频

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科学领域:

  • 免疫学 免疫学 免疫学
  • 分子生物学分子生物学
  • 细胞生物学 细胞生物学

背景情况:

  • T细胞受体 (TCR) 信号强度对于T细胞的发育和功能至关重要.
  • 失调的TCR信号导致了一系列免疫疾病,包括自身免疫.
  • 调控T细胞 (Treg) 和常规T细胞 (Tconv) 都受到TCR信号强度的影响.

研究的目的:

  • 研究逐渐降低TCR信号对T细胞选择和激活的影响.
  • 探索TCR信号在自身免疫性疾病发展中的作用.
  • 评估调节TCR信号在自身免疫和癌症中的治疗潜力.

主要方法:

  • 对T细胞选择和激活的分析,以应对不同的TCR信号强度.
  • 使用TCR信号衰减模型,例如ZAP-70低形态突变.
  • 研究药理学TCR信号减弱对外围T细胞的影响.

主要成果:

  • 降低TCR信号转移T细胞谱向自我反应,并损害Treg细胞的产生.
  • TCR信号衰减可能导致自发的T细胞介导的自身免疫和炎症性疾病.
  • 药理学TCR信号减弱可以选择性地消耗Treg细胞并增强抗瘤免疫力.

结论:

  • TCR-近位信号传递是T细胞恒温和免疫反应的关键调节者.
  • 针对TCR信号提供了一个有希望的策略来管理自身免疫性疾病.
  • 调节TCR信号传递具有改善癌症免疫疗法的潜力.