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Measuring Mitochondrial Function of Naïve and Effector CD8 T Cells
Published on: March 28, 2025
T-cell activation induces selective changes of cellular lipidome
Tapio Lonnberg1, Laxman Yetukuri, Tuulikki Seppanen-Laakso
1Turku Centre for Biotechnology, University of Turku and Abo Akademi University, Turku, Finland.
Frontiers in Bioscience (Elite Edition)
|January 2, 2013
Summary
T-cell activation involves metabolic shifts, altering cellular lipid composition. Human umbilical cord blood T-cells showed changes in phosphatidylcholines and phosphatidylethanolamines, indicating de novo fatty acid synthesis during early activation.
Area of Science:
- Immunology
- Cellular Metabolism
- Lipidomics
Background:
- Naïve T helper cell activation initiates complex signaling pathways.
- This activation requires significant metabolic changes for proliferation and effector function.
Purpose of the Study:
- To investigate alterations in cellular lipid composition during T-cell activation.
- To understand the metabolic reprogramming of T-cells post-activation.
Main Methods:
- Human umbilical cord blood T-cells were activated via T-cell receptor stimulation.
- Ultra-performance liquid chromatography mass spectrometry (UPLC-MS) was used to analyze lipid profiles.
- Transcriptomics data were integrated with lipidomic findings.
Main Results:
- Significant changes in cellular lipid concentrations were observed within 72 hours of T-cell activation, correlating with cell division.
- Phosphatidylcholines and phosphatidylethanolamines shifted towards shorter and more saturated molecular species.
- Evidence suggested de novo fatty acid synthesis and incorporation into cellular membranes.
Conclusions:
- T-cell activation induces substantial remodeling of the cellular lipidome.
- Endogenous fatty acid synthesis plays a key role in adapting T-cells for effector functions.
- Lipidomic changes reflect metabolic reprogramming essential for T-cell proliferation and differentiation.
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