Reference : Interaction of fengycin with stratum corneum mimicking model membranes: a calorimetry...
Scientific journals : Article
Life sciences : Biochemistry, biophysics & molecular biology
http://hdl.handle.net/2268/168982
Interaction of fengycin with stratum corneum mimicking model membranes: a calorimetry study
English
Eeman, Marc []
Oloffson, Gerd []
Sparr, Emma []
Nasir, Mehmet Nail mailto [Université de Liège - ULiège > Chimie et bio-industries > Chimie générale et organique >]
Nylander, Tommy []
Deleu, Magali mailto [Université de Liège - ULiège > Chimie et bio-industries > Chimie biologique industrielle >]
2014
Colloids and Surfaces B: Biointerfaces
Elsevier Science
121
27-35
Yes (verified by ORBi)
International
0927-7765
Amsterdam
The Netherlands
[en] Fengycin ; Isothermal titration calorimetry ; Differential scanning calorimetry ; Critical micelle concentration ; Phase transition
[en] Based on its outstanding antifungal properties, it is reasonable to believe that fengycin might be efficient to topically treat localized dermatomycoses. Since most of the fungi species involved in the formation of those mycotic skin diseases colonize primarily the stratum corneum (SC), studying the interaction between fengycin and SC-mimicking lipid membranes is a primary step to determine the potential of fengycin to overcome the physical barrier of the skin.

In this respect, multilamellar lipid vesicles (MLVs), with a lipid composition mimicking that of the SC, were prepared and characterized by differential scanning calorimetry (DSC). The critical micelle concentration (CMC) of fengycin was also assessed under skin conditions and found to be 1.2 ± 0.1 μM. The molecular interactions of fengycin with SC-mimicking MLVs were investigated by both DSC and isothermal titration calorimetry (ITC). Results showed that the interactions were considerably affected by changes in lipid phase behaviour. At 40 °C and below, fengycin induced exothermic changes in the lipid structures suggesting that less-ordered lipid domains became more-ordered in presence of fengycin. At 60 °C, clearly endothermic interaction enthalpies were observed, which could arise from the “melting” of remaining solid domains enriched in high melting lipids that without fengycin melt at higher temperatures.
Fonds de la Recherche Scientifique (Communauté française de Belgique) - F.R.S.-FNRS ; Université de Liège
Researchers ; Professionals ; Students ; General public ; Others
http://hdl.handle.net/2268/168982
10.1016/j.colsurfb.2014.05.019
http://www.sciencedirect.com/science/article/pii/S0927776514002549

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