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Related Concept Videos

Diversity of Antigen Receptors01:28

Diversity of Antigen Receptors

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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 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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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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Immune surveillance is an integral part of the innate immune system, involving the continuous monitoring of peripheral tissues to detect and respond to pathogens, infected cells, or cancerous cells. This surveillance is conducted primarily by natural killer (NK) cells and phagocytes, which employ distinct but complementary mechanisms to identify and eliminate threats.
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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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Pattern Recognition by CD6: A Scavenger-Like Lymphocyte Receptor.

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CD6, a T cell membrane glycoprotein, may act as a pattern recognition receptor (PRR). Its interaction with microbial signals could offer new therapies for bacterial infections, especially drug-resistant strains.

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Area of Science:

  • Immunology
  • Cell Biology
  • Microbiology

Background:

  • CD6 is a T cell surface glycoprotein associated with the T cell receptor (TCR) complex.
  • Its primary known function involves modulating TCR-mediated signaling pathways.

Purpose of the Study:

  • To explore the potential role of CD6 as a pattern recognition receptor (PRR).
  • To discuss CD6 interactions with microbe- and damage-associated signals.
  • To investigate the therapeutic potential of soluble CD6 in treating bacterial infections.

Main Methods:

  • Review of existing literature on CD6 function and scavenger receptor superfamily.
  • Analysis of potential functional interactions between CD6 and microbial patterns.
  • Discussion of therapeutic applications of soluble CD6.

Main Results:

  • Growing evidence suggests CD6 functions beyond TCR modulation, potentially as a PRR.
  • CD6 recognizes microbe- and damage-associated molecular patterns.
  • Soluble CD6 forms show promise for treating bacterial infections, including multi-drug resistant strains.

Conclusions:

  • CD6 exhibits characteristics of a pattern recognition receptor.
  • CD6-mediated microbial recognition may impact T cell activation and differentiation.
  • Soluble CD6 represents a potential therapeutic strategy against bacterial pathogens.