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• W2072341873 abstract "Nuclear entry of hyperbranched polylysine nanoparticles into cochlear cells Weikai Zhang1, Ya Zhang1, Marian Löbler2, Klaus-Peter Schmitz2, Aqeel Ahmad3, Ilmari Pyykkö1, Jing Zou11Department of Otolaryngology, University of Tampere, Medical School, Tampere, Finland; 2University of Rostock, Institute for Biomedical Engineering, Rostock, Germany; 3Department of Biomedical Engineering and Computational Science, Aalto University, Espoo, FinlandBackground: Gene therapy is a potentially effective therapeutic modality for treating sensorineural hearing loss. Nonviral gene delivery vectors are expected to become extremely safe and convenient, and nanoparticles are the most promising types of vectors. However, infrequent nuclear localization in the cochlear cells limits their application for gene therapy. This study aimed to investigate the potential nuclear entry of hyperbranched polylysine nanoparticles (HPNPs) for gene delivery to cochlear targets.Methods: Rat primary cochlear cells and cochlear explants generated from newborn rats were treated with different concentrations of HPNPs. For the in vivo study, HPNPs were administered to the rats&#39; round window membranes. Subcellular distribution of HPNPs in different cell populations was observed with confocal microscope 24 hours after administration.Results: Nuclear entry was observed in various cochlear cell types in vitro and in vivo. In the primary cochlear cell culture, concentration-dependent internalization was observed. In the cochlear organotypic culture, abundant HPNPs were found in the modiolus, including the spiral ganglion, organ of Corti, and lateral wall tissues. In the in vivo study, a gradient distribution of HPNPs through different layers of the round window membrane was observed. HPNPs were also distributed in the cells of the middle ear tissue. Additionally, efficient internalization of HPNPs was observed in the organ of Corti and spiral ganglion cells. In primary cochlear cells, HPNPs induced higher transfection efficiency than did LipofectamineTM.Conclusion: These results suggest that HPNPs are potentially an ideal carrier for gene delivery into the cochlea.Keywords: gene therapy, hearing loss, cochlea, internalization, nanoparticles, nuclear localization" @default.
• W2072341873 created "2016-06-24" @default.
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• W2072341873 date "2011-03-01" @default.
• W2072341873 modified "2023-10-14" @default.
• W2072341873 title "Nuclear entry of hyperbranched polylysine nanoparticles into cochlear cells" @default.
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• W2072341873 doi "https://doi.org/10.2147/ijn.s16973" @default.
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