関連する実験動画
Updated: Apr 19, 2026

13:58
Peptide:MHC Tetramer-based Enrichment of Epitope-specific T cells
Published on: October 22, 2012
18.8K
T細胞の免疫である. ヒトの記憶CD4+T細胞クローンの機能的異質性は,病原体またはワクチンによってプライムされた
Simone Becattini1, Daniela Latorre2, Federico Mele2
1Institute for Research in Biomedicine, Bellinzona, Università della Svizzera Italiana, Lugano, Switzerland. Institute of Microbiology, ETH Zürich, Zürich, Switzerland.
まとめ
病原体に対するヒトT細胞の反応は,これまで考えられていたよりも多様です. 異なる病原体特異のTヘルパー細胞タイプが存在しますが,個々の細胞は複数の運命を発展させ,予期せぬ機能的異質性を明らかにします.
科学分野:
- 免疫学 免疫学とは
- 細胞生物学 細胞生物学
- 微生物学 微生物学とは
背景:
- 異なったCD4〜+) T細胞サブセット (T〜H〜1,T〜H〜2,T〜H〜17) は,さまざまな病原体に対する免疫を提供します.
- 単一の病原体が単一の極化T細胞タイプを誘発するかどうかは不明である.
研究 の 目的:
- ヒトの病原体およびワクチン特異性Tヘルパー記憶細胞の機能的異質性を調査する.
- 個々のT細胞が病原体曝露時に単一または複数の運命に微分するかどうかを決定する.
主な方法:
- T細胞受容体のディープシーケンシングによる抗原刺激を組み合わせた.
- 分析された病原体およびワクチン特異のTヘルパー1 (T(H) 1 ,T(H) 2 ,およびT(H) 17メモリ細胞.
- 単一のナイブT細胞の微分を in vitro で研究した.
主要な成果:
- 病原体とワクチンに特異的なTヘルパー記憶細胞は,周波数が異なるが,多様性が似ている.
- 単一の運命に偏ったT細胞クローンと,その子孫が複数の運命を獲得したクローンを特定しました.
- 単一のナイブT細胞がインビトロでプリミングされることが,複数のT細胞の運命を引き起こす可能性があることを実証しました.
結論:
- 人間のT細胞の反応は,重要なクローン間およびクローン内機能的異質性を示しています.
- 偏極化されたT細胞反応は,初期プライミングバイアスではなく,特定のクローンの好ましい拡張から生じる可能性があります.
さらに関連する動画
関連する概念動画
Cells of the Adaptive Immune Response
10.3K
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...
10.3K
T Cell Activation and Clonal Selection
17.9K
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...
17.9K
Immunological Memory
18.1K
Immunological memory, a pivotal pillar of the adaptive immune system, is responsible for the body's ability to remember and respond more swiftly and effectively to previously encountered pathogens. This remarkable feature is what makes vaccines so effective in preventing diseases.
What is Immunological Memory?
Immunological memory is an integral function of the immune system that allows it to recognize and react more rapidly and effectively to pathogens previously encountered. This feature...
What is Immunological Memory?
Immunological memory is an integral function of the immune system that allows it to recognize and react more rapidly and effectively to pathogens previously encountered. This feature...
18.1K
Special Features of Adaptive Immunity
4.6K
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,...
4.6K
Cell-mediated Immune Responses
88.6K
Overview
88.6K
Vaccines
63
Vaccines are among the most effective tools in preventive medicine, designed to prepare the immune system to recognize and combat infectious agents. By introducing antigens—substances that the immune system identifies as foreign—vaccines stimulate an adaptive immune response that leads to immunological memory. This immunological memory enables the body to mount a faster and more effective response upon future exposures to the actual pathogen.Vaccines can be categorized based on the...
63

