Melaleuca alternifolia essential oil (Tea Tree Oil, TTO) is well-known for its several biological activities [1,2] and it is largely used as ingredient in skin care products. The aim of this study is the quantitative evaluation on the permeation, skinlayers distribution (stratum corneum, epidermis and dermis) and release in the surrounding environment of TTO markers (i. e. -pinene, β-pinene, α-terpinene, 1,8-cineole, γ-terpinene, 4-terpineol, α-terpineol) when applying a 5 % TTO cream at a finite dosing regimen. Permeation kinetics were studied in vitro on pig ear skin using conventional and ad hoc (for evaluation of released compound in the surrounding environment) static glass Franz diffusion cells. Formulation, receptor phases and skin-layers were analyzed by adopting a fully-automatized and solvent-free analytical method using Headspace Solid Phase Microextraction (HS-SPME) combined with Gas Chromatography- Mass Spectrometry (GC–MS). Skin-layers overall contained less than 1 % of each TTO marker. Only oxygenated terpenes (i. e. 4-terpineol, α-terpineol and 1,8 cineole) significantly permeated through the skin layers, while hydrocarbons were found at trace level in the receptor phase. As expected, due to the volatility of TTO markers, a substantial fraction of each TTO component applied on the skin was released in the surrounding environment. To the best of the authors’ knowledge, in this work for the first time 1) a completely solvent-free approach is used to quantify the TTO markers from skin layers, and 2) an ad hoc modified static Franz cells is used to quantify the release of TTO components in the surrounding environment. References [1] Reichling J, Landvatter U, Wagner H, Kostka KH, Schaefer UF. In vitro studies on release and human skin permeation of Australian tea tree oil (TTO) from topical formulations. Eur J Pharm Biopharm 2006; 64: 222–228 [2] Pazyar N, Yaghoobi R, Bagherani N, Kazerouni A. A review of applications of tea tree oil in dermatology, Int. J Dermatol 2013; 52: 784–790

In vitro permeation, skin-layers distribution and environmental emission of bioactive Tea Tree essential oil components from topic formulations

Barbara Sgorbini
First
;
Francesca Capetti;Cecilia Cagliero;Arianna Marengo;Monica Argenziano;Roberta Cavalli;Stefano Acquadro;Patrizia Rubiolo;Carlo Bicchi
2019-01-01

Abstract

Melaleuca alternifolia essential oil (Tea Tree Oil, TTO) is well-known for its several biological activities [1,2] and it is largely used as ingredient in skin care products. The aim of this study is the quantitative evaluation on the permeation, skinlayers distribution (stratum corneum, epidermis and dermis) and release in the surrounding environment of TTO markers (i. e. -pinene, β-pinene, α-terpinene, 1,8-cineole, γ-terpinene, 4-terpineol, α-terpineol) when applying a 5 % TTO cream at a finite dosing regimen. Permeation kinetics were studied in vitro on pig ear skin using conventional and ad hoc (for evaluation of released compound in the surrounding environment) static glass Franz diffusion cells. Formulation, receptor phases and skin-layers were analyzed by adopting a fully-automatized and solvent-free analytical method using Headspace Solid Phase Microextraction (HS-SPME) combined with Gas Chromatography- Mass Spectrometry (GC–MS). Skin-layers overall contained less than 1 % of each TTO marker. Only oxygenated terpenes (i. e. 4-terpineol, α-terpineol and 1,8 cineole) significantly permeated through the skin layers, while hydrocarbons were found at trace level in the receptor phase. As expected, due to the volatility of TTO markers, a substantial fraction of each TTO component applied on the skin was released in the surrounding environment. To the best of the authors’ knowledge, in this work for the first time 1) a completely solvent-free approach is used to quantify the TTO markers from skin layers, and 2) an ad hoc modified static Franz cells is used to quantify the release of TTO components in the surrounding environment. References [1] Reichling J, Landvatter U, Wagner H, Kostka KH, Schaefer UF. In vitro studies on release and human skin permeation of Australian tea tree oil (TTO) from topical formulations. Eur J Pharm Biopharm 2006; 64: 222–228 [2] Pazyar N, Yaghoobi R, Bagherani N, Kazerouni A. A review of applications of tea tree oil in dermatology, Int. J Dermatol 2013; 52: 784–790
2019
67th International Congress and Annual Meeting of the Society for Medicinal Plant and Natural Product Research (GA) in cooperation with the French Society of Pharmacognosy AFERP
Innsbruck, Austria
September 1–5, 2019
Book of abstracts-67th International Congress and Annual Meeting of the Society for Medicinal Plant and Natural Product Research (GA) in cooperation with the French Society of Pharmacognosy AFERP
1571
1571
Barbara Sgorbini, Francesca Capetti, Cecilia Cagliero, Arianna Marengo, Monica Argenziano, Roberta Cavalli, Stefano Acquadro, Patrizia Rubiolo, Carl...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2318/1829417
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