Document Detail


The effect of ketoconazole on whole blood and skin ciclosporin concentrations in dogs.
MedLine Citation:
PMID:  23331687     Owner:  NLM     Status:  In-Data-Review    
Abstract/OtherAbstract:
Background -  Ciclosporin (CSA) is approved for the treatment of canine atopic dermatitis. Ciclosporin is metabolized by liver cytochrome P450 enzymes, a process inhibited by ketoconazole (KTZ). Hypothesis/Objectives -  The aims of this study were to determine skin and blood CSA concentrations when CSA was administered alone at 5.0 (Treatment 1) or 2.5 mg/kg (Treatment 2) and when CSA was administered at 2.5 mg/kg concurrently with KTZ at 5 (Treatment 3) or 2.5 mg/kg (Treatment 4). We hypothesized that skin and blood CSA concentrations in Treatment 1 would not differ from those obtained with T3 or T4. Animals -  In a randomized cross-over study, six healthy research dogs received each of the treatments (Treatment 1, 2, 3 and 4) once daily for 7 days. Methods -  After the first, fourth and seventh dose for each treatment, a peak and trough skin punch biopsy sample and whole blood sample were collected and analysed with high-performance liquid chromatography-tandem mass spectrometry. Data were analysed using a repeated measures approach with PROC MIXED in SAS. Pairwise comparisons were performed with least squares means and Tukey-Kramer adjustment for multiple comparisons. Results -  Mean blood CSA concentrations in Treatment 1 were not different from those in Treatment 2 or 4, but were less than in Treatment 3. Mean skin CSA concentrations in Treatment 1 were greater than in Treatment 2, not different from those in Treatment 4, and less than those in Treatment 3. Conclusions and clinical importance -  Administration of CSA and KTZ concurrently at 2.5 mg/kg each may be as effective as CSA alone at 5.0 mg/kg for treatment of canine atopic dermatitis.
Authors:
Laura L Gray; Andrew Hillier; Lynette K Cole; Päivi J Rajala-Schultz
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Veterinary dermatology     Volume:  24     ISSN:  1365-3164     ISO Abbreviation:  Vet. Dermatol.     Publication Date:  2013 Feb 
Date Detail:
Created Date:  2013-01-21     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9426187     Medline TA:  Vet Dermatol     Country:  England    
Other Details:
Languages:  eng     Pagination:  118-e28     Citation Subset:  IM    
Copyright Information:
© 2013 The Authors. Veterinary Dermatology © 2013 ESVD and ACVD.
Affiliation:
Departments of Veterinary Clinical Sciences Veterinary Preventive Medicine, College of Veterinary Medicine, The Ohio State University, Columbus, OH 43210, USA.
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