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Issue 10, 2010
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Lipo-oligoarginines as effective delivery vectors to promote cellular uptake

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Abstract

An effective cellular delivery vector with enhanced intracellular retention was developed by conjugating a cell-penetrating peptide (CPP) with a fatty acid chain. The optimized lipopeptide (LP), myristoylated hendecaarginine (C14R11), penetrated the cell membrane with high efficiency, and achieved superior metabolic stability and versatility as compared with unmodified oligoarginine CPPs, offering no adverse effect on cell viability and function. Cellular uptake, intracellular localization, cytotoxicity, and release kinetics of oligoarginines and LPs were investigated using flow cytometry analysis, cytotoxicity assay, and confocal microscopy. The cellular uptake efficiency and intracellular metabolic stability of C14R11 LP was further enhanced by replacing the L-arginine residues with D-arginine isomers. The cellular uptake and intracellular metabolic stability of D-form C14R11 (C14dR11) was significantly increased without any noticeable cytotoxicity compared to the unmodified parent hepta-arginine CPP or L-arginine LPs.

Graphical abstract: Lipo-oligoarginines as effective delivery vectors to promote cellular uptake

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Article information


Submitted
26 Mar 2010
Accepted
14 Jul 2010
First published
09 Aug 2010

Mol. BioSyst., 2010,6, 2049-2055
Article type
Paper

Lipo-oligoarginines as effective delivery vectors to promote cellular uptake

J. S. Lee and C. Tung, Mol. BioSyst., 2010, 6, 2049
DOI: 10.1039/C004684A

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