Document Detail


Vitamin C, uric acid, and glutathione gradients in murine stratum corneum and their susceptibility to ozone exposure.
MedLine Citation:
PMID:  10594762     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The stratum corneum has been recognized as the main cutaneous oxidation target of atmospheric ozone (O3), a major part of photochemical smog. This study reports the presence and distribution of vitamin C, glutathione, and uric acid in murine stratum corneum, and evaluates their susceptibility to acute environmental exposure to O3. Based on tape stripping and a modified extraction method with high performance liquid chromatography electrochemical analysis, we detected vitamin C (208.0 +/- 82.5 pmol per 10 consecutive pooled tapes), glutathione (283.7 +/-96.3), and uric acid (286.4 +/-47.1) in murine stratum corneum as compared with only 16.5 +/- 1.4 pmol alpha-tocopherol. Vitamin C, glutathione (both p < 00.001), and urate (p < 0.01) were found to exhibit a gradient with the lowest concentrations in the outer layers and a steep increase in the deeper layers. To investigate the effect of O3 exposure on hydrophilic antioxidants, we exposed SKH-1 hairless mice to O3 concentrations of 0, 0.8, 1, and 10 p.p.m., and stratum corneum was analyzed before and after exposure. Whereas mock exposure with 0 p.p. m. for 2 h had no significant effect, O3 doses of 1 p.p.m. for 2 h and above showed depletion of all three antioxidants. Vitamin C was decreased to 80% +/- 15% of its pretreatment content (p < 0.05), GSH to 41% +/- 24% (p < 0.01), and uric acid to 44% +/- 28% (p < 0.01). This report demonstrates the previously unrecognized role of hydrophilic antioxidants in the stratum corneum and provides further evidence that O3 induces oxidative stress in this outer skin layer.
Authors:
S U Weber; J J Thiele; C E Cross; L Packer
Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  The Journal of investigative dermatology     Volume:  113     ISSN:  0022-202X     ISO Abbreviation:  J. Invest. Dermatol.     Publication Date:  1999 Dec 
Date Detail:
Created Date:  2000-01-13     Completed Date:  2000-01-13     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  0426720     Medline TA:  J Invest Dermatol     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  1128-32     Citation Subset:  IM    
Affiliation:
Department of Molecular and Cell Biology, University of California, Berkeley, USA. stefanw@socrates.berkeley.edu
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MeSH Terms
Descriptor/Qualifier:
Animals
Antioxidants / analysis*
Ascorbic Acid / analysis*
Epidermis / chemistry,  drug effects*
Female
Glutathione / analysis*
Mice
Mice, Hairless
Ozone / toxicity*
Uric Acid / analysis*
Chemical
Reg. No./Substance:
0/Antioxidants; 10028-15-6/Ozone; 50-81-7/Ascorbic Acid; 69-93-2/Uric Acid; 70-18-8/Glutathione

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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