Amphiphilic Peptides for Efficient siRNA Delivery
Autor: | Melissa Coyle, Abdulaziz Alasmari, Saghar Mozaffari, Ryley Hall, Parvin Mahdipoor, Robert Lamboy, Hamidreza Montazeri Aliabadi, Emira Bousoik, Keykavous Parang, Farideh Amirrad |
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Jazyk: | angličtina |
Rok vydání: | 2019 |
Předmět: |
Polymers and Plastics
Arginine Stereochemistry Peptide cell internalization Article hydrophobic modification lcsh:QD241-441 03 medical and health sciences 0302 clinical medicine breast cancer lcsh:Organic chemistry Amphiphile Gene silencing 030304 developmental biology chemistry.chemical_classification 0303 health sciences Tryptophan General Chemistry Cyclic peptide Amino acid chemistry 030220 oncology & carcinogenesis siRNA peptides Intracellular |
Zdroj: | Polymers, Vol 11, Iss 4, p 703 (2019) Polymers Volume 11 Issue 4 |
ISSN: | 2073-4360 |
Popis: | A number of amphiphilic cyclic peptides&mdash [FR]4, [WR]5, and [WK]5&mdash containing hydrophobic and positively-charged amino acids were synthesized by Fmoc/tBu solid-phase peptide methods and evaluated for their efficiency in intracellular delivery of siRNA to triple-negative breast cancer cell lines, MDA-MB-231 and MDA-MB-468, in the presence and absence of 1,2-dioleoyl-sn-glycero-3-phosphoethanolamine (DOPE). Among the peptides, [WR]5, which contains alternate tryptophan (W) and arginine (R) residues, was found to be the most efficient in the delivery of siRNA by improving the delivery by more than 3-fold when compared to other synthesized cyclic peptides that were not efficient. The data also showed that co-formulation of [WR]5 with lipid DOPE significantly enhanced the efficiency of siRNA delivery by up to ~2-fold compared to peptide alone. Based on the data indicating the efficiency of [WR]5 in siRNA delivery, peptides containing arginine residues on the ring and tryptophan residues on the side chain, [R6K]W6 and [R5K]W5, were also evaluated, and demonstrated improved delivery of siRNA. The presence of DOPE again enhanced the siRNA delivery in most cases. [WR]5, [R5K]W5, and [R6K]W6 did not show any significant toxicity in MDA-MB-231, MDA-MB-468, and AU565 WT cells at N/P ratios of 20:1 or less, in the presence and absence of DOPE. Silencing of kinesin spindle protein (KSP) and Janus kinase 2 (JAK2) was evaluated in MDA-MB-231 cells in the presence of the peptides. The addition of DOPE significantly enhanced the silencing efficiency for all selected peptides. In conclusion, peptides containing tryptophan and arginine residues were found to enhance siRNA delivery and to generate silencing of targeted proteins in the presence of DOPE. |
Databáze: | OpenAIRE |
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