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Updated: Aug 8, 2026
Generation of Human CD40-activated B cells
Published on: October 17, 2009
Lysophosphatidylcholine upregulates CD40 ligand expression in newly activated human CD4+ T cells
S Sakata-Kaneko1, Y Wakatsuki, T Usui
1Department of Clinical Bio-regulatory Science, Kyoto University Graduate School of Medicine, Japan.
Insights
Lysophosphatidylcholine (lyso-PC) promotes T cell inflammation by increasing IFN-gamma and CD40L, impacting Th1/Th2 balance and atherosclerosis pathogenesis. This modified lipid plays a novel role in immune responses.
Area of Science:
- Immunology
- Lipid Metabolism
- Atherosclerosis Research
Background:
- Lysophosphatidylcholine (lyso-PC) accumulates in inflammatory conditions like atherosclerosis.
- T cell infiltration is a hallmark of these disease states.
Purpose of the Study:
- To investigate the effect of lyso-PC on CD4+ T cell function.
- To explore the role of lyso-PC in modulating immune responses and T cell-mediated pathogenesis in atherosclerosis.
Main Methods:
- Stimulation of CD4+ T cells with anti-CD3 antibody and recombinant CD80.
- Treatment with lyso-PC to assess cytokine production and surface marker expression.
Main Results:
- Lyso-PC significantly increased Interferon-gamma (IFN-gamma) production.
- Lyso-PC enhanced CD40L expression on CD4+ T cells.
- Interleukin-2 (IL-2) and Interleukin-4 (IL-4) production remained unaffected by lyso-PC.
Conclusions:
- Lyso-PC can modulate CD4+ T cell functions, potentially propagating local inflammation.
- Lyso-PC may play a role in selecting the Th1/Th2 immune response balance.
- This modified lipid contributes to T cell-mediated pathogenesis in atherosclerosis.
Abstract:
Lysophosphatidylcholine (lyso-PC) accumulates in tissues undergoing inflammation and atherosclerosis, where an infiltration of T cells is also seen. We found that lyso-PC increased IFN-gamma production and CD40L expression in CD4+ T cells stimulated with anti-CD3 Ab and recombinant CD80 molecules, whereas lyso-PC did not affect IL-2 and IL-4 production. These results suggest that lyso-PC, in combination with other stimuli, may regulate CD4+ T cell functions to propagate local inflammatory reactions and also imply a novel role played by a modified lipid in the selection of Th1/Th2 immune response as well as in the T cell mediated pathogenesis in atherosclerosis.
