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Polymer Nanoparticles Enhance Irreversible Electroporation In Vitro.

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    |January 13, 2022
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    Adding polyethylenimine nanoparticles (PEI-NP) to irreversible electroporation (IRE) and high frequency irreversible electroporation (H-FIRE) significantly increased ablation size. This synergy enhances cancer cell ablation without altering media conductivity.

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    Area of Science:

    • Biomedical Engineering
    • Oncology
    • Materials Science

    Background:

    • Irreversible electroporation (IRE) is a cancer treatment modality.
    • Expanding treatment volume often requires increased electrical parameters.
    • Novel strategies are needed to enhance ablation efficiency.

    Purpose of the Study:

    • To investigate the combined effect of polyethylenimine nanoparticles (PEI-NP) and pulsed electric field (PEF) treatments on ablation size.
    • To determine if PEI-NPs enhance irreversible electroporation (IRE), high frequency irreversible electroporation (H-FIRE), and nanosecond pulsed electric fields (nsPEF).

    Main Methods:

    • U118 cells in a 3D culture model were treated with IRE, H-FIRE, or nsPEF, with and without PEI-NPs.
    • Ablation sizes were measured and mapped onto an electric field model.
    • PEI-NP effects on media conductivity, degradation, and uptake were analyzed.

    Main Results:

    • PEI-NPs significantly increased ablation diameter for IRE and H-FIRE treatments.
    • No significant increase in ablation size was observed for nsPEF with PEI-NPs.
    • PEI-NPs did not alter media conductivity, showed no degradation, and had moderate uptake.

    Conclusions:

    • Cationic polymer nanoparticles like PEI-NP synergize with IRE and H-FIRE for enhanced cancer cell ablation.
    • This approach offers a foundation for developing nanoparticles specifically for electroporation therapies.
    • Further research into PEI-NP engineered for electroporation is warranted.