We found a match
Your institution may have rights to this item. Sign in to continue.
- Title
The Transport of Charged Molecules across Three Lipid Membranes Investigated with Second Harmonic Generation.
- Authors
Xu, Baomei; Li, Jianhui; Zhang, Shuai; Zeb, Johar; Chen, Shunli; Yuan, Qunhui; Gan, Wei
- Abstract
Subtle variations in the structure and composition of lipid membranes can have a profound impact on their transport of functional molecules and relevant cell functions. Here, we present a comparison of the permeability of bilayers composed of three lipids: cardiolipin, DOPG (1,2-dioleoyl-sn-glycero-3-phospho-(1′-rac-glycerol), and POPG (1-palmitoyl-2-oleoyl-sn-glycero-3-phospho-(1′-rac-glycerol)). The adsorption and cross-membrane transport of a charged molecule, D289 (4-(4-diethylaminostyry)-1-methyl-pyridinium iodide), on vesicles composed of the three lipids were monitored by second harmonic generation (SHG) scattering from the vesicle surface. It is revealed that structural mismatching between the saturated and unsaturated alkane chains in POPG leads to relatively loose packing structure in the lipid bilayers, thus providing better permeability compared to unsaturated lipid bilayers (DOPG). This mismatching also weakens the efficiency of cholesterol in rigidifying the lipid bilayers. It is also revealed that the bilayer structure is somewhat disturbed by the surface curvature in small unilamellar vesicles (SUVs) composed of POPG and the conical structured cardiolipin. Such subtle information on the relationship between the lipid structure and the molecular transport capability of the bilayers may provide clues for drug development and other medical and biological studies.
- Subjects
SECOND harmonic generation; MOLECULAR structure; MOLECULES; BILAYER lipid membranes; CARDIOLIPIN; MEMBRANE lipids
- Publication
Molecules, 2023, Vol 28, Issue 11, p4330
- ISSN
1420-3049
- Publication type
Article
- DOI
10.3390/molecules28114330