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Are transepidermal water loss and clinical signs correlated in canine atopic dermatitis? A compilation of studies.
MedLine Citation:
PMID:  22575022     Owner:  NLM     Status:  In-Data-Review    
Abstract/OtherAbstract:
Background -  Cutaneous impairment plays a crucial role in atopic dermatitis (AD). Transepidermal water loss (TEWL) measurement is an indirect assessment of skin barrier function and correlates with disease severity in humans. Skin impairment also exists in canine AD; however, concerns exist regarding variability and reliability of TEWL measurements in dogs. Hypothesis/Objectives -  The purposes of this retrospective study were twofold: first, to investigate the correlation between severity of dermatitis [measured by Canine Atopic Dermatitis Extent and Severity Index (CADESI)] and TEWL; and second, to evaluate whether increased TEWL at a young age correlates with disease severity later in life. Methods -  Data from atopic beagles and dogs with natural AD were analysed. Transepidermal water loss was measured in atopic beagles (n = 24) with an open chamber and in dogs with naturally occurring AD with a closed chamber device (two studies, with n = 14 and n = 18). Pearson product-moment correlation was used for analyses. Transepidermal water loss of the inguinal region, axilla, antebrachial flexure and pinna was analysed. Correlations were investigated for each study, separately first and then jointly. They included CADESI and TEWL of individual regions, total CADESI and total TEWL of all measured regions, and total CADESI and TEWL of key regions. Results -  In atopic beagles, TEWL measured at 1 year of age pre- and post-allergen challenge was correlated with CADESI at 1, 3 and 6 years of age. Overall, low correlation coefficients were found; therefore, a biologically relevant connection could not be demonstrated. The main significant positive correlation was found between TEWL in the pinna and total CADESI. Conclusions and clinical importance -  It is concluded that TEWL does not correlate with disease severity.
Authors:
Rosanna Marsella
Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Veterinary dermatology     Volume:  23     ISSN:  1365-3164     ISO Abbreviation:  Vet. Dermatol.     Publication Date:  2012 Jun 
Date Detail:
Created Date:  2012-05-11     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9426187     Medline TA:  Vet Dermatol     Country:  England    
Other Details:
Languages:  eng     Pagination:  238-e49     Citation Subset:  IM    
Copyright Information:
© 2012 The Author. Veterinary Dermatology. © 2012 ESVD and ACVD.
Affiliation:
Department of Small Animal Clinical Sciences, University of Florida, Gainesville, FL, USA.
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