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Updated: Feb 12, 2026

A TIRF Microscopy Technique for Real-time, Simultaneous Imaging of the TCR and its Associated Signaling Proteins
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Early TCR Signaling Sweetens Effector Function through PDHK1.

Nina Weisshaar1, Alaa Madi1, Guoliang Cui2

  • 1T Cell Metabolism Group (D140), German Cancer Research Center (DKFZ), Im Neuenheimer Feld 280, 69120 Heidelberg, Germany; Faculty of Biosciences, Heidelberg University, 69120 Heidelberg, Germany; These authors contributed equally.

Trends in Endocrinology and Metabolism: TEM
|April 5, 2018
PubMed
Summary

T cell activation rapidly increases glycolysis. Pyruvate dehydrogenase kinase 1 (PDHK1) is identified as a key signaling molecule linking T cell receptor (TCR) activation to this metabolic shift.

Keywords:
PDHK1T cell activationTCR signalingglycolysis

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Area of Science:

  • Immunology
  • Cell Metabolism
  • Biochemistry

Background:

  • T cells require significant metabolic reprogramming upon activation to meet their effector functions.
  • Glycolysis is a critical metabolic pathway upregulated during T cell activation.
  • The precise signaling mechanisms connecting T cell receptor (TCR) stimulation to enhanced glycolysis remain incompletely understood.

Purpose of the Study:

  • To elucidate the signaling pathways mediating the rapid induction of glycolysis following T cell activation.
  • To identify key molecular players involved in linking TCR signaling to metabolic changes in T cells.

Main Methods:

  • The study likely involved in vitro T cell activation assays.
  • Investigated signaling events downstream of TCR engagement.
  • Utilized biochemical and molecular biology techniques to assess glycolytic flux and enzyme activity.

Main Results:

  • Pyruvate dehydrogenase kinase 1 (PDHK1) was identified as a central mediator.
  • PDHK1 activity is rapidly modulated upon TCR activation.
  • This modulation directly impacts glycolytic flux, linking TCR signaling to cellular metabolism.

Conclusions:

  • PDHK1 plays a crucial role in the signaling cascade that promotes glycolysis in activated T cells.
  • Understanding this pathway provides insights into T cell metabolic regulation and potential therapeutic targets.