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T Cell Activation and Clonal Selection01:22

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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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Murine Superficial Lymph Node Surgery
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BATF3 programs CD8+ T cell memory.

Marco A Ataide1, Karl Komander2, Konrad Knöpper2

  • 1Würzburg Institute of Systems Immunology, Max-Planck Research Group, University of Würzburg, Würzburg, Germany. marco.ataide@uni-wuerzburg.de.

Nature Immunology
|September 29, 2020
PubMed
Summary
This summary is machine-generated.

The transcription factor BATF3 is crucial for CD8+ T cell memory. Loss of BATF3 impairs T cell survival and memory formation, while its overexpression enhances these processes, offering potential for cell therapy.

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Area of Science:

  • Immunology
  • Cellular Biology
  • Molecular Biology

Background:

  • Antiviral CD8+ T cell responses involve activation, proliferation, differentiation, contraction, and memory formation.
  • The transcription factor BATF3 is vital for conventional dendritic cell development, essential for CD8+ T cell priming.

Purpose of the Study:

  • To investigate the role of BATF3 within T cells during antiviral responses.
  • To determine the impact of BATF3 on CD8+ T cell survival, memory development, and its potential therapeutic applications.

Main Methods:

  • Analysis of BATF3 expression dynamics post-T cell priming.
  • Assessment of CD8+ T cell expansion, differentiation, contraction, and memory formation in Batf3-deficient and overexpressing models.
  • Investigation of the molecular mechanisms, including apoptosis regulation via BIM.

Main Results:

  • BATF3 is transiently expressed early after T cell priming but exerts long-lasting, T cell-intrinsic effects.
  • T cells lacking Batf3 exhibited normal expansion/differentiation but increased contraction and reduced memory.
  • BATF3 overexpression enhanced CD8+ T cell survival and memory transition, partly by regulating BIM-mediated apoptosis.

Conclusions:

  • BATF3 plays a critical T cell-intrinsic role in regulating CD8+ T cell survival and memory.
  • BATF3 is a key determinant of long-term T cell memory.
  • Targeting BATF3 could enhance CD8+ T cell-based immunotherapies.