Photochemically enhanced gene delivery with cationic lipid formulations

Entrapment and degradation of transfecting DNA in endocytic vesicles often hampers the use of lipidic vectors for gene delivery purposes. Photochemical internalisation (PCI) is a technology for achieving light-induced release of DNA trapped inside these vesicles, and therefore represents a way of ov...

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Bibliographic Details
Published in:Photochemical & photobiological sciences 2003-04, Vol.2 (4), p.407-411
Main Authors: Hellum, Marit, Høgset, Anders, Engesaeter, Birgit O, Prasmickaite, Lina, Stokke, Trond, Wheeler, Carl, Berg, Kristian
Format: Article
Language:English
Subjects:
Cations
Cell Survival
DNA - administration & dosage
Flow Cytometry
Humans
Lipids - administration & dosage
Photochemistry
Transfection - methods
Tumor Cells, Cultured
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Summary:Entrapment and degradation of transfecting DNA in endocytic vesicles often hampers the use of lipidic vectors for gene delivery purposes. Photochemical internalisation (PCI) is a technology for achieving light-induced release of DNA trapped inside these vesicles, and therefore represents a way of overcoming the endocytic membrane barrier and improving gene transfer. The technology is based on utilising photosensitizers which localise in the membranes of endocytic vesicles, causing photochemical damages that rupture the vesicles upon illumination. The purpose of this work was to study the effect of PCI on transfection mediated by the cationic lipid N-(2-aminoethyl)-N,N-dimethyl-2,3-bis(tetradecyloxy)-1-propanaminium bromide (betaAE-DMRIE), with or without the helper lipid 1,2-dioleoyl-sn-glycero-3-phosphoethanolamine (DOPE). It was shown that PCI has no effect on betaAE-DMRIE mediated transfection, whereas it significantly enhances transfection mediated by the combination of betaAE-DMRIE and DOPE. The effect of PCI was highly dependent on the timing of illumination relative to the time of DNA delivery, both regarding the sequence of, and the time between, these two treatments.
ISSN:1474-905X
1474-9092
DOI:10.1039/b211880g