title: Stability of giant unilamellar vesicles and large unilamellar vesicles of liquid-ordered phase membranes in the presence of Triton X-100.
abstract: We have investigated the stability of giant unilamellar vesicles (GUVs) and large unilamellar vesicles (LUVs) of lipid membranes in the liquid-ordered phase (lo phase) against a detergent, Triton X-100. We found that in the presence of high concentrations of Triton X-100, the structure of GUVs and LUVs of dipalmitoyl-PC (DPPC)/cholesterol (chol) and sphingomyelin (SM)/chol membranes in the lo phase was stable and no leakage of fluorescent probes from the vesicles occurred. We also found that ether-linked dihexadecylphosphatidylcholine (DHPC) membranes containing more than 20 mol% cholesterol were in the lo phase, and that DHPC/chol-GUV and DHPC/chol-LUV in the lo phase were stable and no leakage of internal contents occurred in the presence of Triton X-100. In contrast, octylglucoside solution could easily break these GUVs and LUVs of the lo phase membranes and induced internal contents leakage. These data indicate that GUVs and LUVs of the lo phase membranes are very valuable for practical use.
authors.affiliation: Materials Science, Graduate School of Science and Engineering, Shizuoka University, 422-8529, Japan.
authors.forename: Yukihiro
authors.initials: Y
authors.lastname: Tamba
authors.forename: Tomoki
authors.initials: T
authors.lastname: Tanaka
authors.forename: Takeshi
authors.initials: T
authors.lastname: Yahagi
authors.forename: Yuko
authors.initials: Y
authors.lastname: Yamashita
authors.forename: Masahito
authors.initials: M
authors.lastname: Yamazaki
mesh_terms: D002784:Cholesterol; D008081:Liposomes / Q000737:chemistry*; D017830:Octoxynol / Q000494:pharmacology*; D010539:Permeability / Q000187:drug effects; D044367:Phase Transition; D010713:Phosphatidylcholines; D013109:Sphingomyelins
chemical_list: D008081:Liposomes; D010713:Phosphatidylcholines; D013109:Sphingomyelins; D017830:Octoxynol; D002784:Cholesterol