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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 TGF-β signaling pathway regulates cell growth, differentiation, adhesion, motility, and development. TGF-β ligands that induce TGF-β signaling are synthesized in their latent form. Several proteases or cell surface receptors such as integrins act upon the latent form, releasing the active ligand. There are three types of mammalian TGF-βs: (TGF-β1, TGF-β2, and TGF-β3) that bind as homodimers or heterodimers to TGF-β receptors. The TGF-β receptors...
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Cytotoxic T cells are a vital component of the immune system. They have the remarkable ability to identify and target antigens on infected or abnormal cells. These antigens often originate from intracellular pathogens such as viruses or abnormal proteins cancer cells produce.
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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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TCF-1: a maverick in T cell development and function.

Fotini Gounari1,2, Khashayarsha Khazaie3

  • 1Knapp Research Center, Section of Rheumatology, Department of Medicine, University of Chicago, Chicago, IL, USA. Gounari.Fotini@mayo.edu.

Nature Immunology
|April 29, 2022
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Summary
This summary is machine-generated.

The T cell factor 1 (TCF-1) protein regulates T cell development and immune responses. It influences gene expression and chromatin structure through various mechanisms, impacting T cell function.

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Area of Science:

  • Immunology
  • Molecular Biology
  • Epigenetics

Background:

  • T cell factor 1 (TCF-1) is a key regulator of T cell development and function.
  • TCF-1 interacts with β-catenin, traditionally linking it to Wnt signaling, but also exhibits β-catenin-independent roles.
  • TCF-1's functions are crucial for immune responses to infection, autoimmunity, and cancer.

Purpose of the Study:

  • To review the multifaceted roles of TCF-1 in T cell biology.
  • To elucidate the mechanistic underpinnings of TCF-1's functions in T cell development and immune regulation.

Main Methods:

  • Literature review of TCF-1's functions in T cell development and immunity.
  • Analysis of TCF-1's interactions with regulatory regions, nuclear factors, and chromatin structure.
  • Discussion of TCF-1's dual role in gene regulation (activation and suppression).

Main Results:

  • TCF-1 binds to accessible regulatory regions, cooperating with other factors to shape epigenetic and transcription programs.
  • TCF-1 can promote or suppress gene expression by modulating chromatin accessibility.
  • TCF-1 binding induces DNA bending, influencing genome-wide chromatin conformation.

Conclusions:

  • TCF-1 is a versatile regulator with diverse roles in T cell development and immune responses.
  • Understanding TCF-1's complex mechanisms, including its impact on chromatin, is essential for T cell biology and therapeutic strategies.