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
DOI:10.1021/ja000007g
日期:2000.3.1
Molecular Umbrella-Assisted Transport of Glutathione Across a Phospholipid Membrane
作者:Vaclav Janout、Lan-hui Zhang、Irina V. Staina、Christophe Di Giorgio、Steven L. Regen
DOI:10.1021/ja010124r
日期:2001.6.1
absence of release of GSH into the external aqueous phase. Results that have been obtained from monolayer experiments, together with the fact that the heavily sulfated conjugate is able to cross the phospholipid bilayer, have yielded strong inferential evidence for an "umbrella-like" action of these molecules as they cross the lipid bilayer.