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相关概念视频

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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B Cell Activation and Differentiation01:24

B Cell Activation and Differentiation

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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...
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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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Immunoglobulin-like Cell Adhesion Molecules01:31

Immunoglobulin-like Cell Adhesion Molecules

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Immunoglobulin-like cell adhesion molecules or Ig-CAMs are a versatile group of cell surface glycoproteins belonging to the immunoglobulin protein superfamily. Ig-CAMs possess the characteristic immunoglobulin protein domains and other domains such as the fibronectin type III domain. The Ig domains are glycosylated to varying degrees in different Ig-CAMs.
Ig-CAMs exhibit either homophilic binding (to other Ig-CAMs) or heterophilic binding (to other ligands such as integrins). While most Ig-CAMs...
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Interactions Between Signaling Pathways01:19

Interactions Between Signaling Pathways

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Signaling cascades usually lack linearity. Multiple pathways interact and regulate one another, allowing cells to integrate and respond to diverse environmental stimuli.
Convergence and divergence, and cross-talk between signaling pathways
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Cell-mediated Immune Responses01:40

Cell-mediated Immune Responses

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Overview
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相关实验视频

Updated: Jul 18, 2025

Murine Model of CD40-activation of B cells
12:24

Murine Model of CD40-activation of B cells

Published on: March 5, 2010

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解码CD40函数的上下文二元性

Syamdas Bandyopadhyay1, Dhiraj Gurjar2, Bhaskar Saha2

  • 1Department of Zoology, Burdwan Raj College, Burdwan, India.

Human immunology
|August 18, 2023
PubMed
概括
此摘要是机器生成的。

跨膜受体CD40表现出功能双重性,从脂质和非域启动不同的信号通路. 这种双重性受到CD40-联结体相互作用和细胞条件的影响,决定了细胞反应.

关键词:
CD40 CD40 CD40 CD40 CD40 CD40 CD40 CD40 CD40 CD40 CD40 CD40 CD40在CD40L中,CD40L是CD40L.基因酶激酶的使用方法漂浮艇是什么意思 漂浮艇是什么意思 漂浮艇是什么意思这就是TRAFs的特点.

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Generation of Human CD40-activated B cells
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Last Updated: Jul 18, 2025

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Generation of Human CD40-activated B cells
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科学领域:

  • 免疫学 免疫学 免疫学
  • 细胞生物学 细胞生物学
  • 分子信号传输的方法

背景情况:

  • 跨膜受体,如CD40,可以根据连接体相互作用和细胞环境引起相反的细胞反应.
  • 由CD40介导的初始信号事件对于确定整体功能结果至关重要.
  • 细胞条件,包括膜脂质组成和先前存在的信号状态,可以调节CD40信号.

研究的目的:

  • 为了研究CD40受体的功能双重性.
  • 阐明CD40-联体相互作用和细胞环境如何影响CD40介导的信号通路.
  • 审查CD40-CD40L相互作用对CD40在各种生理状态中的功能结果的影响.

主要方法:

  • 利用CD40结合来探测受体功能.
  • 采用重组突变的CD40-连接体来剖析相互作用特异信号.
  • 使用激动性抗体激活CD40并研究下游效应.
  • 来自脂质和非膜领域的分化信号通路.

主要成果:

  • 确定CD40在脂质飞和非飞膜域中启动了两个不同的信号体.
  • 证明CD40结合,突变的CD40连接体和激动性抗体揭示了CD40的功能双重性.
  • 证实了最初的CD40-CD40L相互作用在塑造下游信号和细胞反应中的关键作用.
  • 强调了先前存在的细胞信号条件可以修改最初的CD40诱导信号.

结论:

  • CD40表现出功能双重性,从不同的膜微域产生不同的信号通路.
  • CD40-CD40L相互作用是CD40的功能结果的关键决定因素,由细胞环境调节.
  • 了解CD40的信号双重性对于理解其在各种生理过程中的作用至关重要.