Expression of thymic stromal lymphopoietin in canine atopic dermatitis. Issue 1 (19th January 2013)

• Record Type: Journal Article
• Authors: Klukowska‐Rötzler, Jolanta; Chervet, Ludovic; Müller, Eliane J.; Roosje, Petra; Marti, Eliane; Janda, Jozef
• Is Part Of: Veterinary dermatology. Volume 24:Issue 1(2013:Feb.)
• Page Start: 54
• Page End: e14
• Publication Date: 2013-01-19
• Subjects: Veterinary dermatology -- Periodicals; Pet medicine -- Periodicals; 636.08965
• DOI: 10.1111/j.1365-3164.2012.01096.x
• Languages: English
• ISSNs: 0959-4493

Abstract

<abstract abstract-type="main" xml:lang="en"> <title> <x xml:space="preserve">Abstract</x> </title> <p> <bold>Background – </bold> In humans, thymic stromal lymphopoietin (TSLP) plays a central role in the development of allergic inflammation, such as atopic dermatitis (AD), but it is unknown whether it is involved in the pathogenesis of canine AD (CAD).</p> <p> <bold>Hypothesis/Objectives – </bold> Our aim was to characterize canine <italic>TSLP</italic> and to assess its expression in CAD.</p> <p> <bold>Methods – </bold> Canine <italic>TSLP</italic> was identified based on sequence homology with human <italic>TSLP</italic> and the complementary DNA (cDNA) cloned by RT‐PCR. Real‐time quantitative RT‐PCR was established to assess the expression of canine <italic>TSLP</italic> in cultured canine keratinocytes and in skin biopsy specimens from lesional and nonlesional skin of 12 dogs with CAD and eight healthy control dogs.</p> <p> <bold>Results – </bold> Partial canine <italic>TSLP</italic> cDNA was cloned and characterized. It contained four exons that shared 70 and 73% nucleotide identity with human and equine <italic>TSLP</italic>, respectively, encoding the signal peptide and full‐length secreted protein. We found significantly increased <italic>TSLP</italic> expression in lesional and nonlesional skin of dogs with CAD compared with healthy control dogs (<italic>P </italic><<italic> </italic>0.05), whereas no difference was measured between lesional and nonlesional samples. In cultured primary canine keratinocytes, we found increased <italic>TSLP</italic> expression after stimulation with house dust mite allergen extract or Toll‐like receptor ligands lipopolysaccharide and poly I:C.</p> <p> <bold>Conclusions and clinical importance – </bold> Increased <italic>TSLP</italic> expression in the skin of dogs with CAD supports an involvement of TSLP in the pathogenesis of CAD similar to that in humans. Further studies should elucidate the function and therapeutic potential of TSLP in CAD.</p> </abstract>