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  • 1.
    Ardesjö-Lundgren, Brita
    et al.
    Uppsala University, Science for Life Laboratory, SciLifeLab. Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Medical Biochemistry and Microbiology. Swedish Univ Agr Sci, Dept Anim Breeding & Genet, Box 7023, SE-75007 Uppsala, Sweden..
    Tengvall, Katarina
    Uppsala University, Science for Life Laboratory, SciLifeLab. Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Medical Biochemistry and Microbiology. Karolinska Inst, Neuroimmunol Unit, Centrum Mol Med, Dept Clin Neurosci, S-17176 Stockholm, Sweden..
    Bergvall, Kerstin
    Swedish Univ Agr Sci, Dept Clin Sci, Box 7054, SE-75007 Uppsala, Sweden..
    Farias, Fabiana H. G.
    Uppsala University, Science for Life Laboratory, SciLifeLab. Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Medical Biochemistry and Microbiology.
    Wang, Liya
    Swedish Univ Agr Sci, Dept Anat Physiol & Biochem, Box 7011, S-75007 Uppsala, Sweden..
    Hedhammar, Åke
    Swedish Univ Agr Sci, Dept Clin Sci, Box 7054, SE-75007 Uppsala, Sweden..
    Lindblad-Toh, Kerstin
    Uppsala University, Science for Life Laboratory, SciLifeLab. Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Medical Biochemistry and Microbiology. Broad Inst MIT & Harvard, 415 Main St, Cambridge, MA 02142 USA..
    Andersson, Göran
    Swedish Univ Agr Sci, Dept Anim Breeding & Genet, Box 7023, SE-75007 Uppsala, Sweden..
    Comparison of cellular location and expression of Plakophilin-2 in epidermal cells from nonlesional atopic skin and healthy skin in German shepherd dogs2017In: Veterinary dermatology (Print), ISSN 0959-4493, E-ISSN 1365-3164, Vol. 28, no 4, p. 377-e88Article in journal (Refereed)
    Abstract [en]

    Background - Canine atopic dermatitis (CAD) is an inflammatory and pruritic allergic skin disease caused by interactions between genetic and environmental factors. Previously, a genome-wide significant risk locus on canine chromosome 27 for CAD was identified in German shepherd dogs (GSDs) and Plakophilin-2 (PKP2) was defined as the top candidate gene. PKP2 constitutes a crucial component of desmosomes and also is important in signalling, metabolic and transcriptional activities.

    Objectives - The main objective was to evaluate the role of PKP2 in CAD by investigating PKP2 expression and desmosome structure in nonlesional skin from CAD-affected (carrying the top GWAS SNP risk allele) and healthy GSDs. We also aimed at defining the cell types in the skin that express PKP2 and its intracellular location.

    Animals/Methods - Skin biopsies were collected from nine CAD-affected and five control GSDs. The biopsies were frozen for immunofluorescence and fixed for electron microscopy immunolabelling and morphology.

    Results - We observed the novel finding of PKP2 expression in dendritic cells and T cells in dog skin. Moreover, we detected that PKP2 was more evenly expressed within keratinocytes compared to its desmosomal binding partner plakoglobin. PKP2 protein was located in the nucleus and on keratin filaments attached to desmosomes. No difference in PKP2 abundance between CAD cases and controls was observed.

    Conclusion - Plakophilin-2 protein in dog skin is expressed in both epithelial and immune cells; based on Its sub cellular location its functional role is implicated in both nuclear and structural processes.

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