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相关概念视频

T Cell Activation and Clonal Selection01:22

T Cell Activation and Clonal Selection

4.7K
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...
4.7K
T Cell Types and Functions01:24

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...
1.4K
B Cell Activation and Differentiation01:24

B Cell Activation and Differentiation

5.7K
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...
5.7K
Cells of the Adaptive Immune Response01:23

Cells of the Adaptive Immune Response

4.1K
The T and B lymphocytes of the adaptive immune system develop from common lymphoid progenitor cells in the bone marrow. These progenitors give rise to precursors that eventually develop into both T and B lymphocytes. As these precursors mature, they gain the ability to detect and respond to foreign antigens in the body, a process known as immunocompetence. Additionally, these precursors acquire self-tolerance, a process that ensures they do not react to self-antigens. This intricate system...
4.1K
Cytotoxic T Cells-mediated Immune Response01:27

Cytotoxic T Cells-mediated Immune Response

2.0K
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...
2.0K

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相关实验视频

Updated: Sep 12, 2025

A TIRF Microscopy Technique for Real-time, Simultaneous Imaging of the TCR and its Associated Signaling Proteins
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A TIRF Microscopy Technique for Real-time, Simultaneous Imaging of the TCR and its Associated Signaling Proteins

Published on: March 22, 2012

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微小的集群对T细胞激活产生重大影响

Guillaume Le Saux1,2, Piotr Nowakowski3, Esti Toledo1,2

  • 1Department of Materials Engineering, Faculty of Engineering, Ben-Gurion University of the Negev, Beer-Sheva 84105, Israel.

Nano letters
|August 6, 2025
PubMed
概括
此摘要是机器生成的。

在阵列上的工程抗体集群可以完全激活T细胞,即使在低平均密度. 这种空间组织是免疫治疗中有效的T细胞激活平台的关键.

关键词:
抗体聚类是对抗体的聚类.膜波动模型的模型纳米光刻法 (Nanolithography) 是一种纳米光刻法.在T细胞激活过程中,

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Spatial and Temporal Control of T Cell Activation Using a Photoactivatable Agonist
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Spatial and Temporal Control of T Cell Activation Using a Photoactivatable Agonist

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Ligand Nano-cluster Arrays in a Supported Lipid Bilayer

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相关实验视频

Last Updated: Sep 12, 2025

A TIRF Microscopy Technique for Real-time, Simultaneous Imaging of the TCR and its Associated Signaling Proteins
16:10

A TIRF Microscopy Technique for Real-time, Simultaneous Imaging of the TCR and its Associated Signaling Proteins

Published on: March 22, 2012

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Spatial and Temporal Control of T Cell Activation Using a Photoactivatable Agonist
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Spatial and Temporal Control of T Cell Activation Using a Photoactivatable Agonist

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Ligand Nano-cluster Arrays in a Supported Lipid Bilayer
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Ligand Nano-cluster Arrays in a Supported Lipid Bilayer

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科学领域:

  • 免疫学 免疫学 免疫学
  • 生物医学工程 生物医学工程
  • 纳米技术 纳米技术

背景情况:

  • 激活T细胞对于免疫反应和免疫疗法至关重要.
  • 之前的研究表明,对T细胞激活的抗体聚类的益处有限.
  • 平均抗体密度被认为是T细胞激活的主要因素.

研究的目的:

  • 研究抗体空间组织对T细胞激活的影响.
  • 挑战抗体聚类提供有限益处的观念.
  • 探索密集的抗体集群对T细胞激活的潜力.

主要方法:

  • 利用纳米光刻图图案阵列来控制抗体分布.
  • 结合实验方法与理论建模.
  • 在不同的抗体密度和集群模式下研究了T细胞激活.

主要成果:

  • 使用少量密集的抗体集群实现了完全的T细胞激活.
  • 即使在平均抗体密度不足以实现均或稀疏分布的情况下,这种方法也有效.
  • 这些发现支持了膜波动模型,包括合作结合和机械反.

结论:

  • 激活配体的空间组织显著影响T细胞激活.
  • 密集的抗体集群比稀疏或均的分布更有效.
  • 这项研究为设计用于免疫治疗的改进的T细胞激活平台提供了框架.