Construction of histidine-containing hydrocarbon stapled cell penetrating peptides for in vitro and in vivo delivery of siRNAs

Chemical Science
Soonsil HyunJaehoon Yu

Abstract

A hydrocarbon stapled peptide based strategy was used to develop an optimized cell penetrating peptide for siRNA delivery. Various stapled peptides, having amphipathic Leu- and Lys-rich regions, were prepared and their cell penetrating potentials were evaluated. One peptide, stEK, was found to have high cell penetration and siRNA delivery abilities at low nanomolar concentrations. In order to improve its ability to promote gene silencing, stEK was modified by replacing several Lys residues with His moieties. The modified peptide, LKH-stEK, was found to facilitate endosomal escape and to display >90% knock-down with 50 nM of a siRNA targeting cyclophilin B in HeLa cells. The results of an in vivo animal wound healing model study demonstrate that LKH-stEK promotes delivery of an siRNA, which targets the connective tissue growth factor, and that this process leads to efficient gene silencing by the siRNA at a nanomolar level in mouse skin.

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Citations

May 29, 2020·Chemical Record : an Official Publication of the Chemical Society of Japan ... [et Al.]·Hidetomo YokooYosuke Demizu
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Methods Mentioned

BETA
gene knock-down
flow cytometry
transfecting
circular dichroism
confocal microscopy
electrophoresis
transfection
biopsy

Software Mentioned

stAK

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