Molecular Umbrella-Assisted Transport of an Oligonucleotide across Cholesterol-Rich Phospholipid Bilayers
作者:Vaclav Janout、Bingwen Jing、Steven L. Regen
DOI:10.1021/ja053930x
日期:2005.11.1
A series of molecular umbrella conjugates, derived from cholic acid, deoxycholic acid, spermidine, lysine, and 5-mercapto-2-nitrobenzoic acid, have been synthesized and found capable of transporting an attached 16-mer oligonucleotide (S-dT(16)) across liposomal membranes made from 1-palmitoyl-2-oleoyl-sn-glycero-3-phosphocholine (POPC), 1-palmitoyl-2-oleoyl-sn-glycero-3-phosphatidyldglycerol (POPG), and cholesterol [POPC/POPG/cholesterol (65/5/30; mol/mol/mol, v/v/v)] at 37 degrees C. Those molecular umbrellas containing four choloyl (or deoxycholoyl) groups resulted in significantly faster rates of transport as compared to those containing only two such moieties. A model that accounts for these membrane transport processes is proposed.
Molecular Umbrella-Assisted Transport of a Hydrophilic Peptide Across a Phospholipid Membrane
作者:Vaclav Janout、Christophe Di Giorgio、Steven L. Regen