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Related Experiment Videos

Free fatty acid release from endothelial cells.

P H Figard, D P Hejlik, T L Kaduce

    Journal of Lipid Research
    |July 1, 1986
    PubMed
    Summary

    Endothelial cells release free fatty acids (FFA) into their surroundings, primarily from intracellular triglycerides. This process, especially with arachidonic acid, may facilitate fatty acid transfer across the endothelium.

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    Area of Science:

    • Biochemistry
    • Cell Biology
    • Physiology

    Background:

    • Endothelial cells form the inner lining of blood vessels.
    • Fatty acids are crucial for cellular energy and signaling.
    • The release of fatty acids from endothelial cells is not well understood.

    Purpose of the Study:

    • To investigate the capacity of endothelial cells to release free fatty acids (FFA).
    • To identify the source and composition of released FFA.
    • To explore the role of specific fatty acids, like arachidonic acid, in this process.

    Main Methods:

    • Culturing bovine aortic endothelial cells and porcine pulmonary artery endothelial cells.
    • Enriching cells with specific fatty acids (e.g., oleic acid, arachidonic acid).
    • Measuring FFA release into the extracellular fluid in the presence of albumin.

    Main Results:

    • Endothelial cells release FFA into the extracellular fluid without specific stimulation, requiring only albumin.
    • Intracellular triglycerides are the primary source of released FFA.
    • Arachidonic acid enrichment led to significantly higher FFA release compared to oleic acid.
    • Prostaglandins and lipoxygenase products did not substantially contribute to FFA release from arachidonic acid-enriched cells.

    Conclusions:

    • Endothelial cells possess the ability to release fatty acids as FFA.
    • This release mechanism, particularly for arachidonic acid, may be important for transendothelial fatty acid transport.
    • The findings suggest a novel role for endothelial cells in fatty acid metabolism and transport.

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