関連する実験動画
Updated: Aug 1, 2026

09:47
Generation of Human Alloantigen-specific T Cells from Peripheral Blood
Published on: November 21, 2014
T細胞は,異なる細胞タイプにおけるアロゲニックメジャーヒストコンパティビリティ・コンプレックス・プロダクトを区別することができる
Nature
|April 28, 1988
まとめ
T細胞受容体は,メジャー・ヒストコンパティビリティ・コンプレックス (MHC) 分子に結合した外来抗原を認識する. 潜在的に自己ペプチドを持つアロゲニックMHC分子は,T細胞反応の高周波を誘発し,B細胞特異的な製品がリガンドを形成することを示唆しています.
科学分野:
- 免疫学 免疫学とは
- 分子生物学は分子生物学である.
- 細胞生物学 細胞生物学
背景:
- T細胞受容体 (TCRs) は,メジャー・ヒストコンパティビリティ・コンプレックス (MHC) 分子が提示する抗原断片と相互作用する.
- T細胞による外来抗原と自己MHCの認識は,通常は低頻度である.
- また,T細胞は,外来抗原のない,アロゲン性MHC分子に対して高周波応答を発揮する.
研究 の 目的:
- アロゲン的なMHC相互作用中にT細胞受容体によって認識されるリガンドの性質を調査する.
- MHC分子と複合した自己ペプチドがアロゲン系リガンドを形成するという仮説を検証する.
- Vβ17a+ T細胞受容体のためのアロゲニックリガンドの細胞源を決定する.
主な方法:
- メジャー・ヒストコンパティビリティ・コンプレックス (MHC) リガンドとのT細胞受容体相互作用の分析.
- ネズミのT細胞受容体をVβ17a元素で利用する.
- I-Eリガンドの発現をB細胞,マクロファージ,感染した線維芽細胞など,さまざまな細胞タイプで調べる.
主要な成果:
- 特定の関連性は,Vベータ17a元素を使用したマウリンT細胞受容体と,IE分子のアロジェニック形態に対する反応性との間で観察されました.
- I-EリガンドはB細胞で検出されました.
- I-Eリガンドは,I-E+マクロファージやI-E遺伝子で感染した線維芽細胞では検出されなかった.
結論:
- これらの発見は,B細胞特異的な製品がI-Eと結合して,オロジェニックリガンドを形成することを示唆しています.
- これは,アロレアクティビティは,非抗原性ペプチドで複合されたMHC分子のT細胞認識を含むという概念を支持する.
- この研究は,特定のT細胞受容体による全種性MHC認識の細胞基盤の証拠を提供します.
関連する概念動画
Cell-mediated Immune Responses
Overview
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,...
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,...
Antigens Involved in Adaptive Immunity
An antigen is any substance the immune system identifies as foreign and potentially harmful to the body, prompting an immune response. Antigens have two functional properties: immunogenicity and reactivity. Immunogenicity is the ability of an antigen to stimulate a specific immune response. At the same time, reactivity describes the antigen's ability to react with the cells and antibodies produced in response to it.
Complete Antigens
Complete antigens possess both immunogenicity and reactivity.
Complete Antigens
Complete antigens possess both immunogenicity and reactivity.
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...
Naive T cells that have not yet encountered an antigen express two primary CD...
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...
Th1 cells stimulate dendritic cells to express necessary co-stimulatory molecules on their surfaces for...
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...
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...

