MicroRNA delivery mediated by PEGylated polyethylenimine for prostate cancer therapy

Abstract: A microRNA (miRNA) nanomedicine PEG-PEI/miR-221/222 was synthesized based on PEGylated polyethylenimine PEG-PEI and used to transfect prostate cancer cells (PC-3) in vitro. Gel retardation assay confirmed the formation of nanomedicine, of which the zeta potential and particle size were determined by dynamic light scattering. Its cytotoxicity was analyzed by CCK-8 assay-while its transfection efficiency was analyzed by flow cytometry. Cell uptake and intracellular distribution of nanoparticles were evaluated using laser confocal microscopy. RT-PCR and western-blot assays were conducted to verify the regulation of SIRT1 target gene. We found that the properties of the nanocomplexes of miRNA and PEG-PEI depended on N/P ratios. At higher N/P ratio, accompanied by higher zeta potential and higher cytotoxicity, PEG-PEI is needed to completely condense the miRNA into small particles with uniform size distribution. Under an N/P ratio of 20, high transfection efficiency and low carrier cytotoxicity were obtained simultaneously in PC-3 cells in vitro. Consequently, the SIRT1 expression was up-regulated due to the nanoparticle-delivered miR-221/222, which resulted in effective inhibition of PC-3 cells. Our study revealed the PEG-PEI/miR-221/222 nanomedicine as a prospective alternative for treatment of advanced prostate cancer and also lays a foundation for future in vivo investigation.

Object Details

• Location: Deutsche Nationalbibliothek Frankfurt am Main
• Extent: Online-Ressource
• Language: Englisch

References and Relationships

• Bibliographic citation: MicroRNA delivery mediated by PEGylated polyethylenimine for prostate cancer therapy ; volume:16 ; number:1 ; year:2018 ; pages:1257-1267 ; extent:11 ; Open chemistry ; 16, Heft 1 (2018), 1257-1267 (gesamt 11)

Contributors, Places and Time

• Creator: CY, Chen ; GY, Li ; L, Zhang ; XH, Huang ; D, Cheng ; SC, Wu ; CZ, Xu ; JH, Zhou ; L, Xun

Further information

• DOI: 10.1515/chem-2018-0138
• URN: urn:nbn:de:101:1-2410161618372.280684388154
• Rights: Open Access; Der Zugriff auf das Objekt ist unbeschränkt möglich.
• Last update: 15.08.2025, 7:27 AM CEST