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http://dx.doi.org/10.4062/biomolther.2012.20.2.171

HaCaT Keratinocytes and Primary Epidermal Keratinocytes Have Different Transcriptional Profiles of Cornified Envelope-Associated Genes to T Helper Cell Cytokines  

Seo, Min-Duk (College of Pharmacy, Ajou University)
Kang, Tae-Jin (Department of Pharmacy, College of Pharmacy, Sahmyook University)
Lee, Chang-Hoon (College of Pharmacy, Dongguk University)
Lee, Ai-Young (Department of Dermatology, Dongguk University School of Medicine)
Noh, Min-Soo (College of Pharmacy, Ajou University)
Publication Information
Biomolecules & Therapeutics / v.20, no.2, 2012 , pp. 171-176 More about this Journal
Abstract
HaCaT cells are the immortalized human keratinocytes and have been extensively used to study the epidermal homeostasis and its pathophysiology. T helper cells play a role in various chronic dermatological conditions and they can affect skin barrier homeostasis. To evaluate whether HaCaT cells can be used as a model cell system to study abnormal skin barrier development in various dermatologic diseases, we analyzed the gene expression profile of epidermal differentiation markers of HaCaT cells in response to major T helper (Th) cell cytokines, such as $IFN{\gamma}$, IL-4, IL-17A and IL-22. The gene transcriptional profile of cornified envelope-associated proteins, such as filaggrin, loricrin, involucrin and keratin 10 (KRT10), in HaCaT cells was generally different from that in normal human keratinocytes (NHKs). This suggests that HaCaT cells have a limitation as a model system to study the pathophysiological mechanism associated with the Th cell cytokine-dependent changes in cornified envelope-associated proteins which are essential for normal skin barrier development. In contrast, the gene transcription profile change of human ${\beta}2$-defensin (HBD2) in response to $IFN{\gamma}$, IL-4 or IL-17A in HaCaT cells was consistent with the expression pattern of NHKs. $IFN{\gamma}$ also up-regulated transglutaminase 2 (TGM2) gene transcription in both HaCaT cells and NHKs. As an alternative cell culture system for NHKs, HaCaT cells can be used to study molecular mechanisms associated with abnormal HBD2 and TGM2 expression in response to $IFN{\gamma}$, IL-4 or IL-17A.
Keywords
HaCaT Keratinocytes; Cornified envelope associated genes; HBD2; $IFN{\gamma}$; IL-4; IL-17A;
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