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Optimizing Charge Switching in Membrane Lytic Peptides for Endosomal Release of Biomacromolecules
Author(s) -
Sakamoto Kentarou,
Akishiba Misao,
Iwata Takahiro,
Murata Kazuya,
Mizuno Seiya,
Kawano Kenichi,
Imanishi Miki,
Sugiyama Fumihiro,
Futaki Shiroh
Publication year - 2020
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.202005887
Subject(s) - endosome , endocytic cycle , microbiology and biotechnology , intracellular , membrane , cytosol , vesicle , chemistry , lytic cycle , endocytosis , cell , biophysics , biology , biochemistry , enzyme , virus , virology
Endocytic pathways are practical routes for the intracellular delivery of biomacromolecules. Along with this, effective strategies for endosomal cargo release into the cytosol are desired to achieve successful delivery. Focusing on compositional differences between the cell and endosomal membranes and the pH decrease within endosomes, we designed the lipid‐sensitive and pH‐responsive endosome‐lytic peptide HAad. This peptide contains aminoadipic acid (Aad) residues, which serve as a safety catch for preferential permeabilization of endosomal membranes over cell membranes, and His‐to‐Ala substitutions enhance the endosomolytic activity. The ability of HAad to destabilize endosomal membranes was supported by model studies using large unilamellar vesicles (LUVs) and by increased intracellular delivery of biomacromolecules (including antibodies) into live cells. Cerebral ventricle injection of Cre recombinase with HAad led to Cre/loxP recombination in a mouse model, thus demonstrating potential applicability of HAad in vivo.