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Related Concept Videos

T Cell Activation and Clonal Selection01:22

T Cell Activation and Clonal Selection

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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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Generation of Human Chimeric Antigen Receptor Regulatory T Cells
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Reductive carboxylation epigenetically instructs T cell differentiation.

Alison Jaccard1,2, Tania Wyss1,3, Noelia Maldonado-Pérez4

  • 1Department of Oncology, University of Lausanne, Lausanne, Switzerland.

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|September 21, 2023
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Summary
This summary is machine-generated.

Blocking a specific metabolic pathway in CD8+ T cells promotes memory cell formation. This metabolic rewiring enhances chimeric antigen receptor (CAR) T cell therapy efficacy against cancers.

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Area of Science:

  • Immunology
  • Metabolic pathways
  • Cellular metabolism

Background:

  • T cell activation and proliferation require metabolic reprogramming.
  • Naive T cells switch to anabolic metabolism for effector functions.
  • The role of metabolic rewiring in T cell differentiation is not fully understood.

Purpose of the Study:

  • To investigate how metabolic rewiring drives T cell differentiation.
  • To explore the role of reductive carboxylation in CD8+ T cell effector function and memory formation.
  • To assess the therapeutic potential of targeting metabolic pathways in CAR T cell manufacturing.

Main Methods:

  • Investigated glutamine metabolism in proliferating effector CD8+ T cells.
  • Utilized gene deletion of isocitrate dehydrogenase 2 (IDH2) in T cells.
  • Assessed the impact of IDH2 inhibition on CAR T cell differentiation and anti-tumor activity in vivo.
  • Analyzed epigenetic modifications and gene accessibility.

Main Results:

  • CD8+ T cells reductively carboxylate glutamine via IDH2.
  • IDH2 deletion or inhibition does not impair T cell proliferation or effector function.
  • Blocking IDH2 promotes CD8+ T cell differentiation into memory cells.
  • Inhibition of IDH2 during CAR T cell manufacturing enhances anti-tumor efficacy in preclinical models.

Conclusions:

  • Reductive carboxylation by IDH2 is dispensable for effector CD8+ T cell proliferation but drives terminal differentiation.
  • Metabolic pathways regulated by IDH2 epigenetically lock T cells into effector programs.
  • Inhibiting IDH2 increases memory T cell formation, offering a strategy to optimize CAR T cell therapy.