Ferrocene-containing cationic lipids for the delivery of DNA: oxidation state determines transfection activity

Journal of Controlled Release : Official Journal of the Controlled Release Society
Christopher M JewellDavid M Lynn

Abstract

The ability of two redox-active, ferrocene-containing cationic lipids [11-(ferrocenylundecyl)trimethylammonium bromide (FTMA) and bis(11-ferrocenylundecyl)dimethylammonium bromide (BFDMA)] to transfect mammalian cells was investigated. This study sought to determine the range of conditions over which these lipids were capable of transfecting cells and whether the oxidation state of the ferrocenyl groups in these materials could be used to influence the extent of transfection. Experiments conducted in the COS-7 cell line demonstrated that reduced and oxidized FTMA were substantially cytotoxic and did not transfect cells. Subsequent experiments conducted using BFDMA and reporter plasmids encoding enhanced green fluorescent protein (EGFP) and firefly luciferase demonstrated that BFDMA was able to transfect cells. However, the extent of transfection depended significantly upon both the concentration of BFDMA and the oxidation state of the lipid. Quantitative characterization of cytotoxicity and gene expression demonstrated that a window of concentration existed over which reduced BFDMA was non-cytotoxic and yielded high levels of transfection, but over which electrochemically oxidized BFDMA yielded very low (background) levels of t...Continue Reading

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Citations

Apr 19, 2008·The Journal of Physical Chemistry. B·Claire L PizzeyYeshayahu Talmon
Apr 13, 2007·Langmuir : the ACS Journal of Surfaces and Colloids·Melissa E HaysNicholas L Abbott
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