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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 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...
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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.
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Tolerance in T-cell clones.

M Feldmann1, E D Zanders2, J R Lamb3

  • 1ICRF Tumour Immunology Unit, Zoology Department, University College London, London WC 1E 6BT, UK.

Immunology Today
|October 8, 2014
PubMed
Summary
This summary is machine-generated.

Antigen interaction with immune cells can cause immune responses or antigen-specific unresponsiveness, known as immunological tolerance. This review explores new insights into T-cell tolerance, crucial for self-non-self discrimination and immune regulation.

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Area of Science:

  • Immunology
  • Cellular Biology
  • Autoimmunity

Background:

  • Antigen interaction with immune cells can induce immune responses or antigen-specific unresponsiveness (immunological tolerance).
  • Immunological tolerance is a key mechanism for distinguishing self from non-self antigens.
  • Understanding tolerance is vital for managing autoimmune diseases and transplantation rejection.

Purpose of the Study:

  • To review recent advancements in understanding T-cell tolerance.
  • To explore the significance of these findings for immune activation and regulation.
  • To provide insights into the mechanisms underlying self-non-self discrimination.

Main Methods:

  • Review of current literature on T-cell tolerance.
  • Analysis of in vivo and in vitro studies.
  • Synthesis of findings related to immune activation and regulation.

Main Results:

  • New insights into the mechanisms of T-cell tolerance have emerged.
  • These insights enhance our understanding of how the immune system distinguishes self from non-self.
  • The findings have implications for immune regulation and activation pathways.

Conclusions:

  • T-cell tolerance plays a critical role in immune homeostasis.
  • Further research into T-cell tolerance can inform therapeutic strategies for immune-related disorders.
  • Understanding tolerance mechanisms is fundamental to immunology.