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Related Concept Videos

T Cell Activation and Clonal Selection01:22

T Cell Activation and Clonal Selection

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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...
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Diversity of Antigen Receptors01:28

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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...
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T Cell Types and Functions01:24

T Cell Types and Functions

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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...
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B Cell Activation and Differentiation01:24

B Cell Activation and Differentiation

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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...
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Cell Diversity01:13

Cell Diversity

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The concept of a cell started with microscopic observations of dead cork tissue by Robert Hooke in 1665. Hooke coined the term "cell" based on the resemblance of the small subdivisions in the cork to the rooms that monks inhabited, called cells. About ten years later, Antonie van Leeuwenhoek became the first person to observe the living and moving cells under a microscope. In the century that followed, the theory that cells represented the basic unit of life developed.
Multicellular...
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Antigen Presenting Cells01:22

Antigen Presenting Cells

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The immune system is a complex network of cells and molecules that protects the body from foreign invaders. T cells, a type of white blood cell, play a crucial role in this process. They recognize and attack foreign substances, such as pathogens, that enter the body.
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Related Experiment Video

Updated: Mar 27, 2026

Generation of Immature, Mature and Tolerogenic Dendritic Cells with Differing Metabolic Phenotypes
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Generation of Immature, Mature and Tolerogenic Dendritic Cells with Differing Metabolic Phenotypes

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Dendritic cells: phenotypic and functional heterogeneity.

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    Italian Journal of Anatomy and Embryology = Archivio Italiano Di Anatomia Ed Embriologia
    |January 12, 2016
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    This summary is machine-generated.

    Dendritic cells are key immune cells that capture and present antigens to T cells, initiating immune responses. Understanding their diverse subsets and functions is crucial for controlling infections, cancer, and autoimmune diseases.

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    Area of Science:

    • Immunobiology
    • Cellular Immunology

    Background:

    • Dendritic cells (DCs) are crucial for initiating and regulating adaptive immune responses.
    • DCs are specialized antigen-presenting cells with diverse subsets and functions.
    • Their central role in immunobiology has driven increasing research interest for over four decades.

    Purpose of the Study:

    • To review the heterogeneity of dendritic cells.
    • To highlight their differentiation, migration, and maturation processes.
    • To underscore the clinical relevance of understanding DC subsets and behavior.

    Main Methods:

    • Literature review and synthesis of existing research on dendritic cells.
    • Analysis of dendritic cell differentiation from hematopoietic stem cells.
    • Examination of dendritic cell migration and maturation in lymphoid organs.

    Main Results:

    • Identification of distinct dendritic cell subsets, including myeloid and plasmacytoid DCs.
    • Description of DC differentiation from precursors and their migration to lymphoid organs.
    • Elucidation of DC maturation into potent antigen-presenting cells.

    Conclusions:

    • Dendritic cells are essential for orchestrating immune responses against pathogens and tumors.
    • Knowledge of DC subsets and their functions is vital for managing clinical conditions like infections, cancer, allergy, autoimmunity, and graft rejection.
    • Further understanding of dendritic cells offers potential for developing new therapeutic strategies.