当前位置： SCI文献检索 > CHEMISTRY AND PHYSICS OF LIPIDS期刊下所有文献 > The effect of non-deuterated and deuterated isopropyl myristate on the thermodynamical and structural behavior of a 2D Stratum Corneum model with Ceramide [AP].

The effect of non-deuterated and deuterated isopropyl myristate on the thermodynamical and structural behavior of a 2D Stratum Corneum model with Ceramide [AP].

Abstract：

:Isopropyl myristate (IPM) is a widely used penetration enhancer in pharmaceutical formulations, however, its mechanism of action on a molecular scale is still not completely understood. Previous work using a quaternary Stratum Corneum (SC) lipid model in bulk suggested the incorporation of isopropyl myristate into the SC lipid matrix, phase separation, and perturbation of the multilamellar lipid assembly. Here, we used 2D Langmuir monolayers of a ternary SC lipid model, containing ceramide AP C18:18, stearic acid and cholesterol in a molar ratio of [1:1:0.7], respectively, to shed light on the mechanism of action of this important lipophilic penetration enhancer. To do so, the synthesis of chain deuterated isopropyl myristate was successfully performed in order to study the different coupling possibilities between the hydrogenated and deuterated IPM and the alkyl chains of the SC molecules. Our results indicate that only a small portion of IPM is able to mix with our SC model leading to a limited fluidizing effect (small increase of the wavenumber of CH2 stretching vibration, increase of the SC layer flexibility), but will be squeezed out at higher lateral pressures. Furthermore, the deuteration of IPM enhances the miscibility with this SC model, probably due to a different coupling between the alkyl chains or the alkyl and deuterated chains. Additionally, using the pure D-form of CER[AP] in the SC model amplifies the obtained results.

journal_name

Chem Phys Lipids

journal_title

Chemistry and physics of lipids

authors

Oliveira JS,Lange S,Dobner B,Brezesinski G

doi

10.1016/j.chemphyslip.2017.02.002

subject

Has Abstract

pub_date

2017-04-01 00:00:00

pages

1-9

eissn

0009-3084

issn

1873-2941

pii

S0009-3084(16)30170-0

journal_volume

204

pub_type

杂志文章

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