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関連する概念動画

Cell-mediated Immune Responses01:40

Cell-mediated Immune Responses

Overview
Special Features of Adaptive Immunity01:20

Special Features of Adaptive Immunity

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,...
Cells of the Adaptive Immune Response01:23

Cells of the Adaptive Immune Response

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...
T Cell Activation and Clonal Selection01:22

T Cell Activation and Clonal Selection

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...
T Cell Types and Functions01:24

T Cell Types and Functions

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...
Cytotoxic T Cells-mediated Immune Response01:27

Cytotoxic T Cells-mediated Immune Response

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...

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関連する実験動画

Updated: Jul 16, 2026

Murine Superficial Lymph Node Surgery
04:36

Murine Superficial Lymph Node Surgery

Published on: May 21, 2012

CD4 T細胞の必要性は,機能的なCD8 T細胞の記憶を生成するのに役立ちます.

Devon J Shedlock1, Hao Shen

  • 1Department of Microbiology, University of Pennsylvania School of Medicine, Philadelphia, PA 19104, USA.

Science (New York, N.Y.)
|April 12, 2003
PubMed
まとめ

CD4 T細胞の助けは,強固なCD8メモリを開発するために不可欠です. 初期プライミング中にCD4細胞を枯渇させるが,リコールすることはないが,再感染時にCD8記憶細胞の機能を損なう.

科学分野:

  • 免疫学 免疫学とは
  • 細胞免疫学 細胞免疫学
  • 感染症 感染症とは

背景:

  • CD8 T細胞の免疫は,ウイルス感染症や癌の制御に不可欠です.
  • CD8 T細胞のプリミングは,一般的にCD4 T細胞の助けから独立しているが,長寿CD8記憶を生成するCD4細胞の役割はあまり理解されていない.

研究 の 目的:

  • CD4 T細胞が,記憶CD8 T細胞の生成と機能に役立つ役割を調査する.
  • 効果的な二次CD8T細胞応答のために,プライミングまたはリコール段階でCD4T細胞の助けが必要かどうかを判断する.

主な方法:

  • 免疫応答の異なる段階 (プライミング対リコール) の間にCD4T細胞枯渇したマウスモデル.
  • CD4 T細胞の存在または不在で生成されたメモリCD8 T細胞を用いた養子移植実験.
  • 二次的な挑戦 (再感染) に対する記憶CD8T細胞応答の評価.

主要な成果:

  • リコール段階におけるCD4細胞の枯渇は,二次的なCD8T細胞応答に最小限の影響を及ぼした.
  • 初期プライミング段階でのCD4細胞の枯渇は,再感染時にメモリCD8T細胞の応答の大きさを著しく減少させた.
  • CD4なしで生成された記憶CD8T細胞は,CD4が十分な環境に移転しても,欠陥のあるリコール応答を示すのに役立ちます.

さらに関連する動画

Manufacturing Chimeric Antigen Receptor (CAR) T Cells for Adoptive Immunotherapy
06:51

Manufacturing Chimeric Antigen Receptor (CAR) T Cells for Adoptive Immunotherapy

Published on: December 17, 2019

A DNA/Ki67-Based Flow Cytometry Assay for Cell Cycle Analysis of Antigen-Specific CD8 T Cells in Vaccinated Mice
09:17

A DNA/Ki67-Based Flow Cytometry Assay for Cell Cycle Analysis of Antigen-Specific CD8 T Cells in Vaccinated Mice

Published on: January 5, 2021

関連する実験動画

Last Updated: Jul 16, 2026

Murine Superficial Lymph Node Surgery
04:36

Murine Superficial Lymph Node Surgery

Published on: May 21, 2012

Manufacturing Chimeric Antigen Receptor (CAR) T Cells for Adoptive Immunotherapy
06:51

Manufacturing Chimeric Antigen Receptor (CAR) T Cells for Adoptive Immunotherapy

Published on: December 17, 2019

A DNA/Ki67-Based Flow Cytometry Assay for Cell Cycle Analysis of Antigen-Specific CD8 T Cells in Vaccinated Mice
09:17

A DNA/Ki67-Based Flow Cytometry Assay for Cell Cycle Analysis of Antigen-Specific CD8 T Cells in Vaccinated Mice

Published on: January 5, 2021

結論:

  • CD4 T細胞の助けは,機能記憶CD8 T細胞の発達に不可欠です.
  • CD4 T細胞の助けの必要性は,CD8 T細胞の記憶形成のリコール・フェーズではなく,プライミング・フェーズで発生する.
  • これらの発見は,CD4 T細胞が長期的な免疫のための効果的なCD8記憶を確立する上で,これまで認識されていない重要な役割を明らかにしています.