Cited by 63RNA Interference and Gene DeliveryNanoparticle-Based Drug DeliveryAdvanced Drug Delivery Systems

The effect of endosomal escape peptides on in vitro gene delivery of polyethylene glycol‐based vehicles

Moore, Nicole M., Sheppard, Clayton L., Barbour, Tiffany R., Sakiyama‐Elbert, Shelly E.·2008·The Journal of Gene Medicine

Abstract

BACKGROUND: With recent progress in gene therapy clinical trials, there is an even greater demand to advance the development of nonviral gene delivery vehicles. We have previously developed poly(ethylene glycol) (PEG)-based vehicles with transfection efficiency similar to polyethyleneimine and low cytotoxicity. It was hypothesized that conjugating endosomal escape peptides (EEPs) to PEG-based vehicles would further increase their transfection efficiency. The present study aimed to determine how two different EEPs, INF7 and H5WYG, which destabilize the endosomal membrane at different pHs, affect the efficiency of PEG-based vehicles. METHODS: INF7 and H5WYG were conjugated to PEG-tetraacrylate (PEG-TA) via a Michael-type addition at the desired molar ratios. The pH-dependent membrane lytic activity, transfection efficiency, particle size, zeta potential, and endosomal escape kinetic rate constants were determined. RESULTS: Fusogenic peptides, INF7 and H5WYG, showed pH-dependent membrane lytic activity when conjugated to PEG-TA. The highest membrane lytic activity of PEG-INF7 and PEG-H5WYG conjugates occurred at pH 5 and 5.5, respectively. Coupling one INF7 peptide to PEG-DNA binding peptide (DBP) vehicles increased the transfection efficiency ten-fold and showed greater transfection efficiency than PEG-DBP vehicles coupled with H5WYG peptide. Fitting a first-order kinetic model to the average intracellular pH of the vehicle/DNA particles over time determined that coupling EEPs to PEG-DBP vehicles increased the endosomal escape rate constant by two orders of magnitude. CONCLUSIONS: Endosomal escape is a key step in nonviral cellular trafficking and thus the transfection efficiency of nonviral vehicles can be increased by targeting release of DNA from the endosome with EEPs.

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Crossref · 10.1002/jgm.1234

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  • Membrane fusion peptides such as GALA peptides and acid-activatable melittin have been introduced into non-viral vectors to facilitate endosomal escape.

    “In addition, inspired by the mechanism of viral infection, some membrane fusion peptides, such as GALA peptides and acid-activatable melittin, have been introduced into non-viral vectors to facilitate endosomal escape [184–186].”

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Authors
Moore, N. M., Sheppard, C. L., Barbour, T. R., & Sakiyama‐Elbert, S. E.
Affiliations
Washington University in St. Louis (US)
Corresponding author
Sakiyama‐Elbert, Shelly E.
Venue
The Journal of Gene Medicine
Publisher
Wiley
Published
2008-07-21
Volume
10
Issue
10
Pages
1134-1149
ISSN
  • 1099-498X (ISSN-L)
  • 1521-2254
OpenAlex
W1975366433
Cited by
63
References
55
Citations by year
2026: 1 · 2022: 3 · 2021: 3 · 2019: 1 · 2018: 6 · 2017: 3 · 2016: 3 · 2015: 3 · 2014: 4 · 2013: 8 · 2012: 10
FWCI
2.47
Type
journal article
Language
en
Open access
closed
Locations
  • The Journal of Gene Medicine (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › RNA Interference and Gene Delivery
  • Physical Sciences › Materials Science › Biomaterials › Nanoparticle-Based Drug Delivery
  • Life Sciences › Pharmacology, Toxicology and Pharmaceutics › Pharmaceutical Science › Advanced Drug Delivery Systems
Keywords
non-viral gene delivery, transfection efficiency, DNA-binding peptides, intracellular pH
MeSH terms
Animals, Cell Survival, Cricetulus, Genetic Vectors, Cricetinae, Hemolysis, Humans, Models, Biological, Peptides, Polyethylene Glycols, Endosomes, Transfection, Genetic Therapy, CHO Cells, Gene Transfer Techniques

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