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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.
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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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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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The immune system's response to viral infections is a complex and coordinated process involving natural killer (NK) cells, T cell-mediated responses, and antibody-mediated responses.
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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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Related Experiment Video

Updated: Nov 27, 2025

Immunopeptidomics: Isolation of Mouse and Human MHC Class I- and II-Associated Peptides for Mass Spectrometry Analysis
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MHC Class III RNA Binding Proteins and Immunity.

Geraldine Schott1,2, Mariano A Garcia-Blanco1,3,4,5

  • 1Department of Biochemistry and Molecular Biology, University of Texas Medical Branch, Galveston, Texas, USA.

RNA Biology
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RNA-binding proteins encoded by Major Histocompatibility Complex class III genes play key roles in vertebrate immunity and RNA regulation. Dysregulation of these proteins is linked to autoimmune diseases.

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Area of Science:

  • Immunology
  • Molecular Biology
  • Genetics

Background:

  • RNA-binding proteins (RBPs) are crucial for regulating gene expression.
  • The Major Histocompatibility Complex (MHC) class III region harbors genes with immune functions.
  • Post-transcriptional gene regulation and RNA surveillance are vital cellular processes.

Purpose of the Study:

  • To review evidence for the role of RBPs in vertebrate immunity.
  • To investigate specific RBPs encoded within the MHC class III region.
  • To explore the connection between these RBPs and autoimmune diseases.

Main Methods:

  • Literature review of existing data.
  • Focus on genes within the MHC class III region.
  • Analysis of gene products with RNA-binding and regulatory functions.

Main Results:

  • Six MHC class III genes (DDX39B, DXO, LSM2, NELFE, PRRC2A, SKIV2L) encode RBPs.
  • These RBPs are involved in post-transcriptional gene regulation and RNA surveillance.
  • These genes are implicated in immune function and associated with autoimmune conditions.

Conclusions:

  • RBPs encoded by MHC class III genes are significant players in vertebrate immunity.
  • These RBPs are critical for RNA regulation and immune system homeostasis.
  • Further research into these RBPs may offer insights into autoimmune disease pathogenesis.