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Updated: Dec 1, 2025

Enzymatic Synthesis of Epoxidized Metabolites of Docosahexaenoic, Eicosapentaenoic, and Arachidonic Acids
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Enzymatic Synthesis of Epoxidized Metabolites of Docosahexaenoic, Eicosapentaenoic, and Arachidonic Acids

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Eicosapentaenoic acid reduces inflammation and apoptosis by SREBP1/TLR4/MYD88

L Zhang, N N Jia, R H Yang

    Bratislavske Lekarske Listy
    |November 9, 2020
    PubMed
    Abstract

    Insights

    Eicosapentaenoic acid (EPA) protects kidney podocytes from high glucose damage by reducing inflammation and apoptosis. EPA achieves this by inhibiting the SREBP-1/TLR4/MYD88 signaling pathway, offering a potential therapeutic strategy for diabetic nephropathy.

    Area of Science:

    • Nephrology
    • Cell Biology
    • Biochemistry

    Background:

    • Podocyte dysfunction is central to diabetic nephropathy, involving compromised cell integrity, apoptosis, and inflammation.
    • Understanding the mechanisms behind podocyte injury is critical for developing effective treatments.

    Purpose of the Study:

    • To investigate the protective effects of eicosapentaenoic acid (EPA) on podocytes exposed to high glucose.
    • To elucidate the underlying molecular mechanisms of EPA's protective action.

    Main Methods:

    • MPC5 podocyte cell line was treated with high glucose and varying concentrations of EPA.
    • Cell viability was assessed using CCK8 assay, and apoptosis was analyzed by flow cytometry.
    • Changes in podocyte structure markers (podocin, synaptopodin) and signaling pathway components (SREBP-1, TLR4, MYD88) were examined.

    Main Results:

    • EPA significantly reduced high glucose-induced apoptosis and inflammation in podocytes.
    • EPA administration prevented the disruption of podocyte structure markers caused by hyperglycemia.
    • Overexpression of sterol regulatory element-binding protein-1 (SREBP-1) negated EPA's protective effects, indicating its involvement.
    • EPA was found to inhibit the SREBP-1/TLR4/MYD88 signaling pathway in high glucose-treated cells.

    Conclusions:

    • Eicosapentaenoic acid (EPA) demonstrates significant protective effects against podocyte dysfunction in a high glucose environment.
    • EPA exerts its protective action by regulating the SREBP-1 signaling pathway, specifically inhibiting SREBP-1/TLR4/MYD88.
    • These findings suggest EPA as a potential therapeutic agent for diabetic nephropathy, offering a novel treatment strategy.
    Keywords:
    apoptosis SREBP1/TLR4/MYD88.eicosapentaenoic acidinflammation

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