Microemulsion using polyoxyethylene sorbitan trioleate and its usage for skin delivery of resveratrol to protect skin against UV-induced damage

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Abstract

We examined the phase behavior of various polyoxyethylene sorbitan fatty acid ester (polysorbates)/ethanol/isopropyl myristate (IPM)/150 mM NaCl solution (NaClaq) systems in order to prepare a microemulsion containing a low ratio of ethanol, which is more suitable for in vivo application. Using polyoxyethylene sorbitan trioleate (Tween 85), which has a large lipophilic moiety, as a surfactant component, single-phase domain of the phase diagram was the largest of all the polysorbates examined, and in particular a large oilrich single-phase domain was obtained. When the ratio of Tween 85 to ethanol was changed from 1:1 to 3:1, the oil-rich single-phase domain further expanded, which led to a reduced ethanol concentration in the preparation. Thus, we determined the composition of the microemulsion to be Tween 85: ethanol: IPM: NaClaq= 30:10:53:7, and used it for skin delivery of resveratrol. Microemulsion gel was also prepared by adding 6.5% Aerosil® 200 into the microemulsion for ease of topical application. When applied with each vehicle, delivery of resveratrol into Guinea pig skin in vitro was significantly enhanced compared with that by IPM, and resveratrol incorporated into the skin by microemulsion gel decreased lipid peroxidation to 29.5% compared with that of the control. Pretreatment of Guinea pig dorsal skin with the microemulsion gel containing resveratrol almost completely prevented UV-B-induced erythema formation in vivo. These findings demonstrate that the microemulsion using Tween 85 containing a minimal concentration of ethanol enhanced the skin delivery of resveratrol and the incorporated resveratrol exhibited a protective effect against UV-induced oxidative damage.

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CITATION STYLE

APA

Yutani, R., Teraoka, R., & Kitagawa, S. (2015). Microemulsion using polyoxyethylene sorbitan trioleate and its usage for skin delivery of resveratrol to protect skin against UV-induced damage. Chemical and Pharmaceutical Bulletin, 63(9), 741–745. https://doi.org/10.1248/cpb.c15-00378

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