Hallmarks of Atopic Skin Mimicked In Vitro by Means of a Skin Disease Model Based on FLG Knock-down

Sarah Küchler, Dominika Henkes, Katja-Martina Eckl, Katharina Ackermann, Johanna Plendl, Hans-Christian Korting, Hans-Christian Hennies, Monika Schäfer-Korting

Research output: Contribution to journalArticlepeer-review

56 Citations (Scopus)


Loss-of-function mutations in the filaggrin gene (FLG) are a strong predisposing factor for atopic dermatitis, although their relevance to the disease pathomechanism needs further elucidation. The generation of an in vitro model of atopic skin would not only permit further evaluation of the underlying pathogenetic mechanisms and the testing of new treatment options, but would also allow toxicological studies to be performed in a simple, rapid and inexpensive manner. In this study, we have knocked down FLG expression in human keratinocytes and created three-dimensional skin models, which we used to investigate the impact of FLG on epidermal maturation and on skin absorption and its response to irritation. Histopathological evaluation of the skin models showed impaired epidermal differentiation in the FLG knock-down model. In addition, skin irritation induced by an application of sodium dodecyl sulphate resulted in significantly higher lactate dehydrogenase leakage, and interleukin (IL)-6 and IL-8 levels, than in the control model. To assess the effect of filaggrin deficiency on skin absorption of topically applied agents, we quantified the percutaneous absorption of lipophilic and hydrophilic model drugs, finding clinical relevance only for lipophilic drugs. This study clearly demonstrates that important clinical characteristics of atopic skin can be mimicked by using in vitro skin models. The FLG knock-down construct is the first step toward an in vitro model that allows clinical and toxicological studies of atopic-like skin.

Original languageEnglish
Pages (from-to)471-480
Number of pages10
JournalATLA Alternatives to Laboratory Animals
Issue number5
Publication statusPublished - Oct 2011
Externally publishedYes


Dive into the research topics of 'Hallmarks of Atopic Skin Mimicked In Vitro by Means of a Skin Disease Model Based on FLG Knock-down'. Together they form a unique fingerprint.

Cite this