Article (Scientific journals)
Hyaluronan Metabolism in Human Keratinocytes and Atopic Dermatitis Skin Is Driven by a Balance of Hyaluronan Synthases 1 and 3
Malaisse, Jérémy; Bourguignon, Virginie; De Vuyst, Evelyne et al.
2014In Journal of Investigative Dermatology, 134
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Keywords :
Hyaluronan metabolism; keratinocytes; atopic dermatitis
Abstract :
[en] Hyaluronan (HA) is a glycosaminoglycan synthesized directly into the extracellular matrix by three hyaluronan synthases (HAS1, HAS2, and HAS3). HA is abundantly synthesized by keratinocytes but its epidermal functions remain unclear. We used culture models to grow human keratinocytes as autocrine monolayers or as reconstructed human epidermis (RHE) to assess HA synthesis and HAS expression levels during the course of keratinocyte differentiation. In both the models, epidermal differentiation downregulates HAS3 mRNA expression while increasing HAS1 without significant changes in hyaluronidase expression. HA production correlates with HAS1 mRNA expression level during normal differentiation. To investigate the regulation of HAS gene expression during inflammatory conditions linked to perturbed differentiation, lesional and non-lesional skin biopsies of atopic dermatitis (AD) patients were analyzed. HAS3 mRNA expression level increases in AD lesions compared with healthy and non-lesional skin. Simultaneously, HAS1 expression decreases. Heparin-binding EGF-like growth factor (HB-EGF) is upregulated in AD epidermis. An AD-like HAS expression pattern is observed in RHE incubated with HB-EGF. These results indicate that HAS1 is the main enzyme responsible for HA production by normal keratinocytes and thus, must be considered as an actor of normal keratinocyte differentiation. In contrast, HAS3 can be induced by HB-EGF and seems mainly involved in AD epidermis
Disciplines :
Dermatology
Author, co-author :
Malaisse, Jérémy;  University of Namur > Research Unit of Molecular Physiology
Bourguignon, Virginie;  University of Namur > Research Unit of Molecular Physiology
De Vuyst, Evelyne;  University of Namur > Research Unit of Molecular Physiology
Lambert de Rouvroit, Catherine;  University of Namur > Research Unit of Molecular Physiology
NIKKELS, Arjen ;  Centre Hospitalier Universitaire de Liège - CHU > Dermatologie
Flamion, Bruno;  University of Namur > Research Unit of Molecular Physiology
Poumay, Yves;  University of Namur > Research Unit of Molecular Physiology
Language :
English
Title :
Hyaluronan Metabolism in Human Keratinocytes and Atopic Dermatitis Skin Is Driven by a Balance of Hyaluronan Synthases 1 and 3
Publication date :
2014
Journal title :
Journal of Investigative Dermatology
ISSN :
0022-202X
eISSN :
1523-1747
Publisher :
Nature Publishing Group, New York, United States - New York
Volume :
134
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
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