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Title: Ethylcellulose nanoparticles as a new "in vitro" transfection tool for antisense oligonucleotide delivery
Author: Leitner, Stefanie
Grijalvo, Santiago
Solans Marsà, Conxita
Eritja i Casadellà, Ramon
García Celma, Ma José
Calderó Linnhoff, Gabriela
Keywords: Nanopartícules
Issue Date: 1-Feb-2020
Publisher: Elsevier B.V.
Abstract: Oil-in-water nano-emulsions have been obtained in the HEPES 20 mM buffer solution / [Alkylamidoammonium:Kolliphor EL = 1:1] / [6 wt% ethylcellulose in ethyl acetate] system over a wide oil-to-surfactant range and above 35 wt% aqueous component at 25 °C. The nano-emulsion with an oil-to-surfactant ratio of 70/30 and 95 wt% aqueous component was used for nanoparticles preparation. These nanoparticles (mean diameter around 90 nm and zeta potential of +22 mV) were non-toxic to HeLa cells up to a concentration of 3 mM of cationic species. Successful complexation with an antisense phosphorothioate oligonucleotide targeting Renilla luciferase mRNA was achieved at cationic/anionic charge ratios above 16, as confirmed by zeta potential measurements and an electrophoretic mobility shift assay, provided that no Fetal Bovine Serum is present in the cell culture medium. Importantly, Renilla luciferase gene inhibition shows an optimum efficiency (40%) for the cationic/anionic ratio 28, which makes these complexes promising for "in vitro" cell transfection.
Note: Versió postprint del document publicat a:
It is part of: Carbohydrate Polymers, 2020, vol. 229
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ISSN: 0144-8617
Appears in Collections:Articles publicats en revistes (Farmàcia, Tecnologia Farmacèutica i Fisicoquímica)

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