ArticleScientific reports2025
Fast and efficient intracellular delivery of large size nanoparticles into mammalian cells by in situ electroporation.
Article in Scientific reports, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Nanoparticles of various sizes and materials are widely used for targeted intracellular delivery in mammalian cell models. However, endocytic uptake often leads to endosomes embedding, reducing delivery efficiency, especially for larger particles. Electroporation offers a direct means of accessing the cytosol, bypassing this limitation. Here, we employ a microchip featuring integrated capacitive microelectrodes to perform spatially selective, rapid and efficient electroporation of 200 nm fluorescent nanoparticles into adherent CHO-K1 epithelial cells. Operating at low voltage amplitudes, the system minimizes cellular damage while maintaining high delivery efficiency. We confirm effective cytoplasmic delivery and preferential perinuclear localization of internalized nanoparticles, with minimal impact on cell viability. Through a biophysical two-compartment model of the cell-microelectrode system, we simulate and explain the dependency of delivery efficiency of nanoparticles from the characteristics of electroporation stimuli and from cell geometry. The approach represents a promising platform for applications such as nanoparticle-mediated drug delivery and high-throughput screening even with particles approaching or exceeding 100 nm in diameter.
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