メジャー・ヒストコンパティビリティ・コンプレックス+ペプチドの溶性T細胞受容体による特定の低親和認識
S Weber1, A Traunecker, F Oliveri
1Basel Institute for Immunology, Switzerland.
Nature
|April 30, 1992
まとめ
研究者らは,溶性T細胞受容体 (TCR) を開発し,主要組織適合性複合体の分子によって提示される特定のペプチドと結合した. この生物学的に活性な溶解性TCRは,関連性のあるペプチド抗原と関連性のないペプチド抗原を区別することで,T細胞の活性化を阻害することができます.
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.
- バイオケミストリー バイオケミストリー
背景:
- T細胞受容体 (TCR) は,ペプチド-MHC複合体を認識するために重要である.
- CD4やCD8のような共受容体は,T細胞の抗原認識に役立ちます.
- TCR結合ダイナミクスを理解することは,免疫応答の研究に不可欠です.
研究 の 目的:
- 溶性分子を用いてT細胞受容体 (TCR) 結合を分析する.
- 機能研究のために,溶性TCR-免疫グロブリンキメラを設計する.
- 溶性TCRの生物学的活性と特異性を評価する.
主な方法:
- TCRアルファとベータ鎖の変数と定数領域と免疫グロブリン軽鎖の定数領域を組み込んだTCR-免疫グロブリンキメラを構築しました.
- 発現,組み立て,そして,感染した骨髄腫細胞系を使用して,溶解性TCRをアルファベータヘテロダイマーとして分泌した.
- 抗原依存型T細胞クローン活性化の阻害を測定することによって,生物学的活動を評価した.
主要な成果:
- 溶性TCR-免疫グロブリンキメラを成功裏に生成した.
- 溶解性TCRは,機能的なαβヘテロジマーとして分泌された.
- 溶性TCRが抗原依存型T細胞の活性化を特異的に抑制することを実証した.
- MHC分子によって提示される正しいペプチドと不正なペプチドを区別する溶解TCRの能力を確認しました.
結論:
- 溶解性TCRは,生物学的活性を維持するように設計することができます.
- 溶解性TCRは,T細胞の反応を特異的に抑制することができます.
- この溶解性TCRは,T細胞の認識と抗原特異性を研究するための新しいツールを提供します.
関連する概念動画
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...
Antigen Processing Pathways
MHC molecules are key players in the immune response, enabling T cells to recognize and respond to specific antigens. They are present on the surface of all nucleated cells in the body and are instrumental in presenting antigens to T cells and activating them. T cells recognize the MHC-antigen complex and initiate an immune response. MHC class I and MHC class II are two main types of MHC molecules, each associated with a distinct antigen processing pathway.
MHC Class I: Presenting Endogenous...
MHC Class I: Presenting Endogenous...
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...
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...
B Cell Activation and Differentiation
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...
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...


