MDPI Publishing

MDPI Publishing

Polyethyleneimine, poly-L-lysine, chitosan and some others cationic polymers have been thoroughly studied as nucleic acid delivery systems in gene therapy. However, the drug release from these systems proceeds at a very low rate due to extremely high binding between a carrier and gene material. To reduce these interactions and to enhance drug release, we developed a set of amphiphilic polypeptides containing positively and negatively charged amino acids as well as a hydrophobic one. The copolymers obtained were characterized by size-exclusion chromatography, static light scattering, HPLC amino acid analysis and 1 HNMR spectroscopy. All copolymers formed particles due to a self-assembly in aqueous media. Depending on polypeptide composition, the formation of particles with hydrodynamic diameters from 180 to 900 nm was observed. Stability of polymer particles, loading and release efficiency were carefully studied. Cellular uptake of the particles was efficient and their cytotoxicity was negligible. The application of polymer carriers, containing siRNA, to vascular endothelial growth factor (VEGF-A165) silencing of ARPE-19 cells was successful. The gene silencing was confirmed by suppression of both messenger RNA and protein expression. ► ▼ Show Figures Graphical abstract This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited Share and Cite MDPI and ACS Style Osipova, O.; Sharoyko, V.; Zashikhina, N.; Zakharova, N.; Tennikova, T.; Urtti, A.; Korzhikova-Vlakh, E. Amphiphilic Polypeptides for VEGF siRNA Delivery into Retinal Epithelial Cells. Pharmaceutics 2020 , 12 , 39. AMA Style Osipova O, Sharoyko V, Zashikhina N, Zakharova N, Tennikova T, Urtti A, Korzhikova-Vlakh E. Amphiphilic Polypeptides for VEGF siRNA Delivery into Retinal Epithelial Cells. Pharmaceutics . 2020; 12(1):39. Chicago/Turabian Style Osipova, Olga; Sharoyko, Vladimir; Zashikhina, Natalia; Zakharova, Natalya; Tennikova, Tatiana; Urtti, Arto; Korzhikova-Vlakh, Evgenia. 2020. "Amphiphilic Polypeptides for VEGF siRNA Delivery into Retinal Epithelial Cells." Pharmaceutics 12, no. 1: 39. Find Other Styles Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here . Article Metrics



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