| The role of chronic inflammation in cutaneous fibrosis: fibroblast growth factor receptor deficiency in keratinocytes as an example. | |
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MedLine Citation:
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PMID: 22076327 Owner: NLM Status: In-Data-Review |
Abstract/OtherAbstract:
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Fibrosis is associated with a variety of skin diseases and causes severe aesthetic and functional impairments. Functional studies in rodents, together with clinical observations, strongly suggest a crucial role of chronic injury and inflammation in the pathogenesis of fibrotic diseases. The phenotype of mice lacking fibroblast growth factor (FGF) receptors 1 and 2 in keratinocytes supports this concept. In these mice, a defect in keratinocytes alone initiated an inflammatory response, which in turn caused keratinocyte hyperproliferation and dermal fibrosis. As the mechanism underlying this phenotype, we identified a loss of FGF-induced expression of claudins and occludin, which caused abnormalities in tight junctions with concomitant deficits in epidermal barrier function. This resulted in severe transepidermal water loss and skin dryness. In turn, activation of keratinocytes and epidermal γδ T cells occurred, which produced IL-1 family member 8 and S100A8 and S100A9. These cytokines attracted immune cells and activated fibroblasts, resulting in a double paracrine loop through production of keratinocyte mitogens by dermal cells. In addition, a profibrotic response was induced in fibroblasts. Our results highlight the importance of an intact epidermal barrier for the prevention of inflammation and fibrosis and the role of chronic inflammation in the pathogenesis of fibrotic diseases. |
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Authors:
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Michael Meyer; Anna-Katharina Müller; Jingxuan Yang; Jitka Sbreve Ulcová; Sabine Werner |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: The journal of investigative dermatology. Symposium proceedings / the Society for Investigative Dermatology, Inc. [and] European Society for Dermatological Research Volume: 15 ISSN: 1529-1774 ISO Abbreviation: J. Investig. Dermatol. Symp. Proc. Publication Date: 2011 Dec |
Date Detail:
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Created Date: 2011-11-14 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 9609059 Medline TA: J Investig Dermatol Symp Proc Country: United States |
Other Details:
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Languages: eng Pagination: 48-52 Citation Subset: IM |
Affiliation:
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Department of Biology, Institute of Cell Biology, ETH Zurich, Zurich, Switzerland. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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