関連する実験動画
Updated: Jun 23, 2026

09:47
Generation of Human Alloantigen-specific T Cells from Peripheral Blood
Published on: November 21, 2014
抗原特異性,メジャーヒストコンパティビリティ複合体限定T細胞クローンのアルロ活性性の分子基礎
L A Matis1, S B Sorger, D L McElligott
1Molecular Immunology Laboratory, Food and Drug Administration, Bethesda, Maryland 20892.
Cell
|October 9, 1987
まとめ
T細胞受容体遺伝子発現は,T細胞が外来または自己メジャーヒストコンパティビリティコンプレックス (MHC) 分子を認識する方法を明らかにします. この研究は,MHC制限認識とアロ認識が,主にT細胞受容体-MHC分子結合親和性によって異な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.
- 遺伝学 遺伝学とは
背景:
- 適応性免疫システムは,自己と非自己を区別するためにT細胞に依存しています.
- メジャー・ヒストコンパティビリティ・コンプレックス (MHC) 分子は,T細胞に抗原を提示する.
- T細胞受容体 (TCR) とMHCの相互作用を理解することは,免疫学にとって極めて重要です.
研究 の 目的:
- MHC限定抗原認識とアルレアクティビティの関係を調査する.
- 特定のT細胞クローンにおけるT細胞受容体 (TCR) アルファおよびベータ遺伝子発現を分析する.
主な方法:
- 研究されたT細胞受容体 (TCR) アルファおよびベータ遺伝子発現.
- 利用されたB10.Aマウスからのシトクロームc特異,Ekα:Ekβ (Ek) 制限ヘルパーT細胞クローン.
- 異なるオロ活性パターンに基づくクローンの分離.
主要な成果:
- T細胞クローンの間で4つの異なるアロレアクティビティパターンを特定しました.
- クローンは,VαとVβの遺伝子セグメントを共有した,複数のアロゲニックLA分子に対して交叉反応する.
- アロリアクティブ特異性は,ユニークなVα-JαおよびVβ-Dβ-Jβ結合イベントから生じた.
- アロ認識と自己MHC認識を媒介するTCRの間でホモロジーが観察されました.
結論:
- MHC限定認識とアロ認識は,主にTCRとMHC分子の結合親和性によって異なる可能性があります.
- TCR遺伝子の使用は,抗原認識とアルレアクティビティのメカニズムについての洞察を提供します.
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,...
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...
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.
Diversity of Antigen Receptors
Antigen receptors are essential components of the immune system crucial in defending the body against foreign invaders. These receptors are present on the surface of B and T cells, enabling them to recognize antigens and mount an appropriate immune response.
Before encountering any antigen, lymphocytes express these receptors. On B cells, the antigen receptor is a membrane-bound antibody molecule called BCR; on T cells, it is a T cell receptor or TCR. B and T cell receptors are composed of two...
Before encountering any antigen, lymphocytes express these receptors. On B cells, the antigen receptor is a membrane-bound antibody molecule called BCR; on T cells, it is a T cell receptor or TCR. B and T cell receptors are composed of two...
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...

