Evidence of free fatty acid interdigitation in stratum corneum model membranes based on ceramide [AP] by deuterium labelling.
This research paper provides direct evidence concerning the localisation of free fatty acids in stratum corneum lipid model membranes. We employed partially deuterated free fatty acids to gain further information about the assembly of a stratum corneum lipid model membrane based on a ceramide of the phytosphingosine-type (ceramide [AP]) with particular respect to the position of the deuterated groups of the free fatty acids. The application of behenic-22,22,22-d(3)-acid and cerotic-12,12,13,13-d(4)-acid confirmed that the short-chain ceramide [AP] forces the longer-chained free fatty acids to incorporate into the bilayer created by ceramide [AP]. The ceramide [AP] molecules determine the structural assembly of this model membrane and obligate the long-chain free fatty acids to either arrange inside this formation or to separate as a fatty acid rich phase.
Schroeter
Annett
A
Martin-Luther-Universität Halle-Wittenberg, Institute of Pharmacy, Department of Pharmaceutics and Biopharmaceutics, Halle, Germany.
Kiselev
Mikhail A
MA
Hauss
Thomas
T
Dante
Silva
S
Neubert
Reinhard H H
RH
D002518:Ceramides / Q000737:chemistry*; D003903:Deuterium / Q000737:chemistry*; D005230:Fatty Acids, Nonesterified / Q000737:chemistry* / Q000378:metabolism; D008051:Lipid Bilayers / Q000737:chemistry*; D008567:Membranes, Artificial; D033363:Neutron Diffraction; D012867:Skin / Q000737:chemistry*
D002518:Ceramides; D005230:Fatty Acids, Nonesterified; D008051:Lipid Bilayers; D008567:Membranes, Artificial; D003903:Deuterium