| High transepidermal water loss induces fatty acid synthesis and cutaneous fatty acid-binding protein expression in rat skin. | |
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MedLine Citation:
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PMID: 9697049 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Stratum corneum lipids (SCLs) are responsible for the water barrier function (WBF) of the skin in mammals. Recent studies have indicated that epidermal lipid synthesis might be regulated by WBF of stratum corneum and that cutaneous fatty acid-binding protein (C-FABP) plays an important role in fatty acid metabolism in epidermis. To clarify the regulatory mechanism of lipid synthesis, we assessed the effects of barrier disruption induced by either acetone treatment or linoleic acid deficiency on epidermal lipid synthesis in rat. Transepidermal water loss (TEWL) was measured with an evaporimeter before and after treatment. The time course of re-establishing SCLs was examined biochemically and histochemically and the expression of C-FABP in the epidermis was immunohistochemically examined. When the rat skin was covered with a vapor-impermeable membrane after the acetone treatment removing SCLs and inducing WBF disruption, the usual recovery of SCLs was blocked and TEWL was kept high by 24 h. In the uncovered area, rapid redeposition of SCLs within 24 h was found and associated with normal compositions of epidermal lipids including sphingolipids, free fatty acids and sterol and, immunohistochemically, C-FABP was very weakly expressed in epidermis at 0.5 and 2 h, and then strongly in the whole layers at 4 h, and returned to a normal pattern by 8 h. The epidermis of the covered rat skin was kept weak in C-FABP expression by 24 h. In the linoleic acid-deficient rats, TEWL did not increase and the expression pattern of C-FABP showed no notable change until 28 weeks after initiation of the diets, indicating that C-FABP expression may not be affected by altered essential fatty acid metabolism. These results suggest that increase of TEWL itself stimulates C-FABP expression, leading to activation of fatty acid metabolism. |
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Authors:
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H Yamaguchi; A Yamamoto; R Watanabe; N Uchiyama; H Fujii; T Ono; M Ito |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Journal of dermatological science Volume: 17 ISSN: 0923-1811 ISO Abbreviation: J. Dermatol. Sci. Publication Date: 1998 Jul |
Date Detail:
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Created Date: 1998-10-05 Completed Date: 1998-10-05 Revised Date: 2006-11-15 |
Medline Journal Info:
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Nlm Unique ID: 9011485 Medline TA: J Dermatol Sci Country: IRELAND |
Other Details:
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Languages: eng Pagination: 205-13 Citation Subset: IM |
Affiliation:
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Department of Dermatology, Niigata University School of Medicine, Japan. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Acetone
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pharmacology Animals Azo Compounds Biological Transport Body Water / metabolism* Carrier Proteins / metabolism* Chromatography, Gas Fatty Acid-Binding Proteins Fatty Acids / metabolism* Immunoenzyme Techniques Linoleic Acid / deficiency Male Myelin P2 Protein / metabolism* Neoplasm Proteins* Nerve Tissue Proteins* Permeability / drug effects Rats Rats, Inbred F344 Skin / drug effects, metabolism* |
| Chemical | |
Reg. No./Substance:
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0/Azo Compounds; 0/Carrier Proteins; 0/Fabp7 protein, rat; 0/Fatty Acid-Binding Proteins; 0/Fatty Acids; 0/Myelin P2 Protein; 0/Neoplasm Proteins; 0/Nerve Tissue Proteins; 1320-06-5/oil red O; 2197-37-7/Linoleic Acid; 67-64-1/Acetone |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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