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Related Concept Videos

Antigens Involved in Adaptive Immunity01:26

Antigens Involved in Adaptive Immunity

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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
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Antigen Presenting Cells01:22

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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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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.
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Cells of the Epidermis01:24

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The epidermis is made of four or five layers of epithelial cells, depending on its location in the body. From deep to superficial, these layers are the stratum basale, stratum spinosum, stratum granulosum, stratum lucidum, and stratum corneum.
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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.
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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.
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Preparation of Single-cell Suspensions for Cytofluorimetric Analysis from Different Mouse Skin Regions
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Dendritic cells and the skin environment.

Franca Ronchese1, Kerry L Hilligan2, Johannes U Mayer1

  • 1Malaghan Institute of Medical Research, Wellington 6012, New Zealand.

Current Opinion in Immunology
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Summary
This summary is machine-generated.

Skin dendritic cells act as sentinels, interacting with surrounding cells. This network shapes their function, influencing immune responses against pathogens.

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Area of Science:

  • Immunology
  • Dermatology
  • Cell Biology

Background:

  • The skin hosts immune cells, including dendritic cells, crucial for defense against pathogens.
  • Dendritic cells function as sentinels, capturing antigens and migrating to lymph nodes to initiate immune responses.

Purpose of the Study:

  • To review recent advances on the interactions between skin dendritic cells and their surrounding cellular network.
  • To explore how this network influences dendritic cell phenotype and function.

Main Methods:

  • Review of recent scientific literature and research findings.
  • Synthesis of information on the structural and functional connections within the skin immune microenvironment.

Main Results:

  • Skin dendritic cells are integrated into a network with epithelial and stromal cells.
  • This network provides structural support, growth factors, spatial cues, and environmental contact.
  • The network facilitates interactions with other immune cells and the skin microbiome.

Conclusions:

  • The complex network of cells in the skin creates a unique microenvironment.
  • This skin environment significantly conditions the phenotype and function of dendritic cells.
  • Understanding this network is key to comprehending skin immunity and immune responses.