関連する実験動画
Updated: Jul 14, 2026

09:27
New Tools to Expand Regulatory T Cells from HIV-1-infected Individuals
Published on: May 30, 2013
CD4+CD25+T細胞媒介抑制のトール経路に依存したブロックが,デンドリット細胞によって行われます
Chandrashekhar Pasare1, Ruslan Medzhitov
1Howard Hughes Medical Institute and Section of Immunobiology, Yale University School of Medicine, New Haven, CT 06520, USA.
まとめ
トール型受容体 (TLRs) は,調節性T細胞 (TR細胞) を阻害することで,適応免疫を誘発する. このTLR媒介の免疫誘導は,部分的にインタールイキン-6を介して,病原体に特異的な反応を可能にします.
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:
- トール型受容体 (TLR) は,抗原呈現細胞 (APC) による適応性免疫反応の活性化に不可欠です.
- 調節性T細胞 (TR細胞) は通常,自己反応性T細胞の活性化を阻害し,免疫の開始を制御する.
研究 の 目的:
- トール型受容体 (TLRs) によって媒介される免疫誘導の新しいメカニズムを調査する.
- TLRsが適応性免疫における調節性T細胞 (TR細胞) の機能に影響を与えるかどうかを判断する.
主な方法:
- Toll経路の活性化を誘発するために,微生物刺激が使用されました.
- CD4+CD25+TR細胞の抑制活性に対するTLR誘導の効果を評価した.
- 微生物の認識時にTLRによるインタールイキン-6 (IL-6) 誘導を測定した.
主要な成果:
- Toll経路の微生物誘導は,CD4+CD25+TR細胞の抑制機能をブロックすることが判明しました.
- TLRsによる抑制活性へのこのブロックは,病原体特異の適応免疫応答の活性化を可能にしました.
- 観察された効果は,TLRsによって誘発されたインタールイキン-6 (IL-6) に部分的に依存していた.
結論:
- トール型受容体 (TLR) は,共刺激効果とは独立して,免疫誘導のための第二のメカニズムを持っています.
- TLRsは,調節性T細胞 (TR細胞) の抑制活動を克服することができ,それによって病原体に対する適応免疫を促進します.
- インターリューキン-6は,TR細胞抑制機能のTLR媒介阻害に作用する.
関連する概念動画
Inhibition of CDK Activity
The orderly progression of the cell cycle depends on the activation of Cdk protein by binding to its cyclin partner. However, the cell cycle must be restricted when undergoing abnormal changes. Most cancers correlate to the deregulated cell cycle, and since Cdks are a central component of the cell cycle, Cdk inhibitors are extensively studied to develop anticancer agents. For instance, cyclin D associates with several Cdks, such as Cdk 4/6, to form an active complex. The cyclin D-Cdk4/6 complex...
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...

