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Importance of interfacial water in permeabilization of ceramide bilayers

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dc.contributor.authorNeitchev, V.es
dc.contributor.authorKostova, E.es
dc.contributor.authorDimitrov, A.S.
dc.date.accessioned2011-02-22T10:59:15Z
dc.date.available2011-02-22T10:59:15Z
dc.date.issued1998
dc.description.abstractThe role of structured water at the membrane- aqueous interface in regulating the water permeability functions of the epidermal horny layer (Stratum corneum) is not clear at present. The subject of this review is the effect of perturbed interfacial water structure on the relative water permeability properties in shrinkage experiments of reconstituted vesicle suspensions of ceramides and cholesterol in the gel phase. Water structure was perturbed by a series of reagents known to affect the phase equilibrium of lipid assemblies. Multilamellar bilayers containing synthetic ceramides N-palmitoyl-D-L-dihydrosphingosine, and Noleoyl- D-sphingosine were used as model membranes. The reagent binding to the ceramide membrane was determined by fluorescence measurements with 1- anilino, 8-naphtalene sulphonate (ANS). A dependence of number of binding sites for ANS on the type of reagent was found. The change of relative water permeability with concentration of reagents was studied. Analysis of these data reveals that the anomalous behaviour of relative water permeability with the concentration of reagents used is due to concentrationdependent structural transitions of the bound water at the membrane-aqueous interface. Different possibilities of interaction of the reagents with the interface are discussed. At the end, it is suggested that the interfacial water in multilamellar ceramide structures may also contribute to the water holding and permeability barrier functions of cell membrane complex within the stratum corneum.es
dc.formatapplication/pdfes
dc.format.extent10es
dc.identifier.issn0213-3911es
dc.identifier.urihttp://hdl.handle.net/10201/19092
dc.languageenges
dc.publisherMurcia : F. Hernándezes
dc.relation.ispartofHistology and histopathologyes
dc.rightsinfo:eu-repo/semantics/openAccesses
dc.subjectCeramideses
dc.subjectInterfacial-wateres
dc.subject.otherCDU::5 - Ciencias puras y naturales::57 - Biología::577 - Bioquímica. Biología molecular. Biofísicaes
dc.titleImportance of interfacial water in permeabilization of ceramide bilayerses
dc.typeinfo:eu-repo/semantics/articlees
dspace.entity.typePublicationes
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Histology and histopathology Vol.13, nº 3 (1998)