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When T cells with CD4 markers are activated, they give rise to two types of effector cells: helper T cells and regulatory T cells. Meanwhile, T cells with CD8 markers differentiate into effector cytotoxic T cells. The differentiation of CD4 T cells into helper T cell subsets, such as Th1, Th2, and Th17 cells, is dependent on the antigen type, antigen-presenting cell, and regulatory cytokines.
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TGF - β Signaling Pathway01:16

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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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Regulation of Metabolism01:19

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Cellular needs and conditions vary from cell to cell and change within individual cells over time. For example, the required enzymes and energetic demands of stomach cells are different from those of fat storage cells, skin cells, blood cells, and nerve cells. Furthermore, a digestive cell works much harder to process and break down nutrients during the time that closely follows a meal compared with many hours after a meal. As these cellular demands and conditions vary, so do the amounts and...
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Signaling cascades usually lack linearity. Multiple pathways interact and regulate one another, allowing cells to integrate and respond to diverse environmental stimuli.
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Cellular respiration is a fundamental metabolic process that enables organisms to generate energy from organic molecules. One of its central pathways is the tricarboxylic acid (TCA) cycle, also known as the Krebs cycle, which plays a crucial role in energy production and biosynthetic processes.Conversion of Pyruvate to Acetyl-CoAThe pyruvate generated from glycolysis undergoes oxidative decarboxylation by the pyruvate dehydrogenase complex, producing acetyl-CoA, one molecule of NADH, and one...
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Metabolic Pathways Involved in Regulatory T Cell Functionality.

Rosalie W M Kempkes1, Irma Joosten1, Hans J P M Koenen1

  • 1Laboratory of Medical Immunology, Department of Laboratory Medicine, Radboud University Medical Center, Nijmegen, Netherlands.

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|December 19, 2019
PubMed
Summary

Regulatory T cells (Treg) use glycolysis for proliferation and migration, but oxidative metabolism is key for their suppressive function. Understanding Treg metabolism can improve immunotherapy for autoimmune diseases and transplant rejection.

Keywords:
FOXP3human Treg cellsmetabolismmigrationproliferationsuppressive functiontolerance-inducing therapies

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Area of Science:

  • Immunology
  • Cell Metabolism

Background:

  • Regulatory T cells (Treg) are crucial for immune homeostasis and hold therapeutic potential for autoimmune diseases and transplant rejection.
  • Treg heterogeneity and instability present challenges for Treg-based immunotherapy.
  • The metabolic profiles of Treg cells are largely unknown, hindering optimization of Treg-based therapies.

Purpose of the Study:

  • To review current knowledge on human Treg metabolic profiles and their role in Treg functionality.
  • To explore how Treg metabolism influences proliferation, migration, and suppressive capacity.
  • To identify potential metabolic targets for enhancing Treg-based immunotherapies.

Main Methods:

  • Systematic literature search of PubMed and Embase for articles published before April 28th, 2019.
  • Keywords included "regulatory T lymphocyte," "cell metabolism," "cell proliferation," "migration," "suppressor function," and related terms.
  • Inclusion of mouse study findings where human data was limited.

Main Results:

  • Glycolysis supports the biosynthetic and bioenergetic requirements for Treg proliferation and migration.
  • Oxidative metabolism is primarily responsible for maintaining Treg suppressive function.
  • Metabolic differences exist between Treg and non-Treg cells, offering therapeutic avenues.

Conclusions:

  • Treg functionality is intricately linked to their metabolic state.
  • Targeting Treg metabolism could enhance the efficacy of Treg-based immunotherapy.
  • Further research into Treg metabolism is essential for advancing tolerance-inducing therapies.