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Author(s): Ana M Cardoso
Sara Trabulo
Ana L Cardoso
Silvia Maia
Paula Gomes
Amalia S Jurado
Maria C P Pedroso de Lima
Title: Comparison of the Efficiency of Complexes Based on S4(13)-PV Cell-Penetrating Peptides in Plasmid DNA and siRNA Delivery
Issue Date: 2013
Abstract: The successful application of gene therapy approaches is highly dependent on the efficient delivery of nucleic acids into target cells. In the present study, new peptide-based nonviral systems were developed to enhance plasmid DNA and siRNA delivery, aiming at generating appropriate gene delivery and gene silencing tools for preclinical and clinical application. For this purpose, 0 cell-penetrating peptide derived from the wild-type S4(13)-PV peptide was synthesized through the addition of a five-histidine tail to its N-terminus (H-5-S4(13)-PV), and its ability to mediate gene expression and gene silencing was evaluated and compared to that of the wild-type peptide. The histidine-enriched peptide, H-5-S4(13)-PV, proved to be generally more efficient and less toxic than the wild-type peptide in the delivery of plasmid DNA. In addition, complexes of H-5-S4(13)-PV with siRNAs, but not of S4(13)-PV, were efficiently internalized by cells and presented high knockdown activity (63%). Interestingly, systems containing the S4(13)-PV or the H-5-S4(13)-PV peptide exhibited superior biological activity when compared to those containing the reverse NLS or scrambled peptides, suggesting that both the cell-penetrating; sequence and the NLS of the S4(13)-PV peptide influence the competence Of binary and ternary complexes to accomplish nucleic acid delivery. In order to unravel the cancer therapeutic potential of formulations with the histidine-enriched peptide, their efficiency to mediate silencing of the oncogenic protein survivin was evaluated. As opposed to complexes with the wild-type peptide, H-5-S4(13)-PV complexes showed the ability to promote a high survivin knockdown at the level of both protein (44%) and mRNA (73%), in HT1080 cells.
Subject: Outras ciências médicas
Other medical sciences
Scientific areas: Ciências médicas e da saúde::Outras ciências médicas
Medical and Health sciences::Other medical sciences
Document Type: Artigo em Revista Científica Internacional
Rights: openAccess
Appears in Collections:FCUP - Artigo em Revista Científica Internacional

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