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Compatibility testing in vitro: a comparison with in vivo patch test data

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For safety reasons cosmetic formulations have to be assessed for putative side effects like skin irritation. The human patch test is an appropriate method for this type of assessment, but it cannot be used for the higher throughput needed for screening innovative formulations and a distinct assessment is often difficult. The aim of this study was therefore to investigate the feasibility of using an in vitro approach for compatibility testing to determine the irritancy of surfactants. Test samples were provided by the German Society of Cosmetic Chemists (DGK), which conducted a human patch test study with the same set of samples in parallel. This gave us the unique opportunity to correlate in vitro with in vivo data. To assess irritant effects in vitro, reconstructed human epidermis was exposed to seven coded test samples consisting of individual anionic surfactants, blends of surfactants, and controls. A multiple endpoint analysis was established comprising the viability, cytotoxicity, histology, cytokine release and differential gene expression. Using this test strategy, a very good correlation was determined for our in vitro assessment of compatibility with a theoretical ranking and the human patch test data.
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Document Type: Abstract

Affiliations: 1: VTB Skin Hair Physiology, Henkel KGaA, Building Z33, Henkelstr. 67, 40191 Düsseldorf, Germany 2: VTD BioServices, Henkel KGaA, 40191 Düsseldorf, Germany 3: Phenion GmbH & Co. KG, 60439 Frankfurt am Main, Germany

Publication date: April 1, 2007

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