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T Cell Activation and Clonal Selection01:22

T Cell Activation and Clonal Selection

706
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...
706
Cell-mediated Immune Responses01:40

Cell-mediated Immune Responses

68.1K
Overview
68.1K
Cells of the Adaptive Immune Response01:23

Cells of the Adaptive Immune Response

980
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...
980
B Cell Activation and Differentiation01:24

B Cell Activation and Differentiation

1.7K
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...
1.7K
Antigen Presenting Cells01:22

Antigen Presenting Cells

1.8K
The immune system is a complex network of cells and molecules that protects the body from foreign invaders. T cells, a type of white blood cell, play a crucial role in this process. They recognize and attack foreign substances, such as pathogens, that enter the body.
T cells require the help of antigen-presenting cells (APCs), which process foreign antigens into smaller fragments that can be recognized by T cells. These APCs are highly specialized cells that efficiently internalize antigens...
1.8K
T Cell Types and Functions01:24

T Cell Types and Functions

1.0K
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...
1.0K

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関連する実験動画

Updated: Jun 24, 2025

Generation of Human Alloantigen-specific T Cells from Peripheral Blood
09:47

Generation of Human Alloantigen-specific T Cells from Peripheral Blood

Published on: November 21, 2014

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細胞 構造 が 素朴 な T 細胞 の 反応 を 形成 する

Benjamin D Hale1, Yannik Severin1, Fabienne Graebnitz2

  • 1Institute of Molecular Systems Biology, Department of Biology, ETH Zürich, Zürich, Switzerland.

Science (New York, N.Y.)
|June 6, 2024
PubMed
まとめ

細胞の構造,特に原始的なCD8T細胞の核包膜の形成は,その分化に影響する. インヴァギナーションを持つ先天的なTØ細胞は,異なる反応を示し,刺激時により多くのエフェクタ細胞を生成します.

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Isolation and Ex Vivo Culture of Vδ1+CD4+γδ T Cells, an Extrathymic αβT-cell Progenitor
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Isolation and Ex Vivo Culture of Vδ1+CD4+γδ T Cells, an Extrathymic αβT-cell Progenitor

Published on: December 7, 2015

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Mouse Naïve CD4+ T Cell Isolation and In vitro Differentiation into T Cell Subsets
07:12

Mouse Naïve CD4+ T Cell Isolation and In vitro Differentiation into T Cell Subsets

Published on: April 16, 2015

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関連する実験動画

Last Updated: Jun 24, 2025

Generation of Human Alloantigen-specific T Cells from Peripheral Blood
09:47

Generation of Human Alloantigen-specific T Cells from Peripheral Blood

Published on: November 21, 2014

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Isolation and Ex Vivo Culture of Vδ1+CD4+γδ T Cells, an Extrathymic αβT-cell Progenitor
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Mouse Naïve CD4+ T Cell Isolation and In vitro Differentiation into T Cell Subsets
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Mouse Naïve CD4+ T Cell Isolation and In vitro Differentiation into T Cell Subsets

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科学分野:

  • 免疫学
  • 細胞生物学
  • 分子生物学

背景:

  • ネイブT細胞は,個々の細胞の分化経路によって誘発される,抗原刺激後の予測可能な集団反応を示します.
  • これらの単細胞T細胞の決定を左右する本質的な要因は,ほとんど不明のままである.
  • サブセル構造,特に核膜の特徴は,T細胞の運命を決定する要因として広く研究されていない.

研究 の 目的:

  • 素朴なCD8T細胞の分化におけるサブセルラー構造,特に核包膜の侵入の役割を調査する.
  • 核包膜の侵入 (TØ vs. TO細胞) がT細胞の刺激反応に影響するかどうかを判断する.
  • 細胞構造とエフェクターとメモリT細胞の生成の関係を探求する.

主な方法:

  • 先例のCD8T細胞におけるサブセル構造の特徴化,TØ (陰道化存在) とTO (陰道化不在) 集団を定義する.
  • T細胞受容体 (TCR) 刺激後の早期応答遺伝子 Nr4a1 を含む遺伝子発現の分析.
  • TØ 細胞と TO 細胞の増殖能力とフェノタイプのアウトカムを比較する in vitro 微分化試験

主要な成果:

  • 原始的なCD8T細胞の核包膜は成熟,活性化,分化状態とともに変化する.
  • TØ細胞は,TCR刺激時に,カルシウム流入に依存して,Nr4a1発現を増加させる.
  • TO細胞と比較して,TØ細胞はエフェクタルのような細胞に優遇的に分化するが,TO細胞は増殖が少なく,メモリ前駆体フェノタイプへの傾向が大きい.

結論:

  • 細胞構造は核包膜の侵入によって特徴付けられ,先天的なCD8T細胞の運命の潜在的決定因子として機能する.
  • 異なるサブセルラー構造は,抗原刺激に対する差異的反応と,その後の差異化経路と相関する.
  • これらの発見は,T細胞の免疫生物学と潜在的治療標的を理解するための新しい道を開きます.