Related Experiment Video
Updated: May 12, 2026
09:41
Preparation of Single-Cell Suspension of Mouse Thymic Epithelial Cells and Staining of Intracellular Molecules for Flow Cytometric Analysis
Published on: July 26, 2024
Thymus-homing dendritic cells in central tolerance
Husein Hadeiba1, Eugene C Butcher
1Laboratory of Immunology and Vascular Biology, Department of Pathology, Stanford University School of Medicine, Stanford, CA, USA. hadeiba@stanford.edu
European Journal of Immunology
|April 26, 2013
Summary
Peripheral dendritic cells (DCs) transport antigens to the thymus, which is crucial for establishing central tolerance. Understanding DC trafficking and localization helps explain how developing T cells avoid self-reactivity.
Area of Science:
- Immunology
- Cell Biology
Background:
- Central tolerance prevents autoimmunity by eliminating self-reactive T cells.
- Antigen presentation in the thymus is key for central tolerance.
- Peripheral antigens can be presented in the thymus via thymic epithelial cells, blood-borne antigens, or migrating dendritic cells.
Purpose of the Study:
- To discuss the role of thymic dendritic cells (DCs) in central tolerance.
- To examine the trafficking properties of three principal thymic DC populations.
- To explore the functional consequences of DC localization within the thymus on T cell selection.
Main Methods:
- Review and discussion of existing literature on thymic DC populations.
- Characterization of DC subsets based on their trafficking and microenvironmental positioning.
- Analysis of the functional impact of DC localization on thymic selection events.
Main Results:
- Peripheral DCs migrate to the thymus to present antigens.
- Three distinct thymic DC populations exhibit unique trafficking patterns.
- DC localization within the thymus influences thymic selection processes.
Conclusions:
- Thymic homing peripheral DCs are essential for presenting peripheral antigens during central tolerance.
- Understanding the characteristics and trafficking of thymic DCs provides insight into T cell repertoire development.
- The functional consequences of DC localization highlight their critical role in maintaining immune homeostasis.
Related Concept Videos
01:20Special 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,...
01:22T 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...
01:23Cells 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...
01:16Primary Lymphoid Organs
Primary lymphoid organs are pivotal in the formation, development, and maturation of lymphocytes, the white blood cells that serve as the backbone of our immune system. This crucial function underscores their fundamental role in maintaining our overall health and immunity. The two primary lymphoid organs of prime importance are the red bone marrow and the thymus.
The red bone marrow is a soft, spongy tissue nestled in the interior of long bones such as the humerus and femur. It is the site...
The red bone marrow is a soft, spongy tissue nestled in the interior of long bones such as the humerus and femur. It is the site...
01:24T 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...
01:29Hypersensitivity Reactions: Delayed Hypersensitivity Reactions
Delayed-Type Hypersensitivity (DTH), or Type IV hypersensitivity, is a cell-mediated immune response. It occurs when T cells, rather than antibodies, mediate a reaction to specific antigens. It is characterized by a delayed onset (1-2 days) and involves the recruitment of macrophages to the inflammation site.The initiation of a DTH response begins with the sensitization of T cells. During this phase, which lasts at least 1-2 weeks, antigen-specific T cells are activated, clonally expanded, and...