Lipid membrane composition influences drug release from dioleoylphosphatidylethanolamine-based liposomes on exposure to ultrasound
2011
Evjen, Tove J. | Nilssen, Esben A. | Fowler, Robert A. | Røgnvaldsson, Sibylla | Brandl, Martin | Fossheim, Sigrid L.
The effect of membrane composition on calcein release from dioleoylphosphatidylethanolamine (DOPE)-based liposomes on exposure to low doses of 1.13MHz focused ultrasound (US) was investigated by multivariate analysis, with the goal of designing liposomes for US-mediated drug delivery. Regression analysis revealed a strong correlation between sonosensitivity and the non-bilayer forming lipids DOPE and pegylated distearoylphosphatidylethanolamine (DSPE-PEG 2000), with DOPE having the strongest impact. Unlike most of the previously studied distearoylphosphatidylethanolamine (DSPE)-based liposomes, all the current DOPE-based liposome formulations were found stable in 20% serum in terms of drug retention.
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