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 subcellular location its functional role is implicated in both nuclear and structural processes.
Contexte:
La dermatite atopique canine (
Objectifs:
L'objectif principal était d’évaluer le rôle de
Sujets/Méthodes:
Des biopsies cutanées ont été prélevées pour neuf
Résultats:
Nous observons l'expression de
Conclusion: La protéine Plakophiline‐2 dans la peau de chien est exprimée à la fois par les cellules épithéliales et par les cellules immunitaires et, basé sur sa localisation subcellulaire, son rôle fonctionnel est impliqué à la fois dans les processus nucléaires et structurels.
Introducción:
La dermatitis atópica canina (
Objetivos:
El objetivo principal fue evaluar el papel de la
Animales/Métodos:
Se recolectaron biopsias cutáneas de nueve perros afectados por
Resultados:
Se observó por vez primera la expresión de
Conclusión: La proteína placofilina‐2 en la piel de perro se expresa tanto en las células epiteliales como inmunitarias, y basados en su ubicación subcelular su papel funcional estaría implicado en procesos nucleares y estructurales.
Hintergrund:
Die atopische Dermatitis des Hundes (
Ziele:
Das Hauptziel war eine Evaluierung der Rolle von
Tiere/Methoden:
Es wurden Hautbiopsien von neun Schäferhunden mit
Ergebnisse:
Als neue Beobachtung fanden wir die Exprimierung von
Schlussfolgerung: Plakophilin‐2 Protein in der Hundehaut wird sowohl in epithelialen wie auch in Immunzellen exprimiert und aufgrund seiner subzellulären Lokalisation wird seine funktionelle Rolle sowohl in Vorgängen im Kern wie auch in der Struktur vermutet.
背景:
犬アトピー性皮膚炎(
目的:
主要な目的は、
供与動物/方法: CAD罹患した9頭のGSDおよび5頭のコントロールGSDから皮膚生検を採取した。 生検材料を免疫蛍光検査のために凍結させ、電顕免疫標識検査および形態検査のために固定した。
結果:
我々は、犬の皮膚における樹状細胞およびT細胞における
結論: イヌの皮膚において、プラコフィリン‐2タンパク質は、上皮および免疫細胞の両方に発現していた。また、細胞内の発現位置により、その機能的役割は、核および構造形成過程の両方に関与すると考えられる。
背景:
犬异位性皮炎(
目的:
主要目的是研究发生
动物/方法: 从9只CAD和5只健康对照的德国牧羊犬上收集皮肤活检样品。将活检样品冷冻用免疫荧光检测,固定后用于电子显微镜免疫标记检测和形态学观察。
结果:
我们首次发现,在犬皮肤的树突状细胞和T细胞中存在
结论: 犬皮肤中的PKP2蛋白在上皮细胞和免疫细胞中均有表达,根据其亚细胞定位推测,其功能可能涉及细胞核和细胞结构的构建过程。
Contexto:
A dermatite atópica canina (
Objetivos:
O principal objetivo foi avaliar o a função da
Animais/métodos:
Biópsias cutâneas foram coletadas de nove cães atópicos e cinco
Resultados:
Observou‐se a expressão de
Conclusão: A placofilina‐2 é um proteína expressada tanto em células epiteliais quanto do sistema imunológico, e, baseado em sua localização subcelular, a sua função está relacionada tanto a processos nucleares quanto estruturais.
© 2017 The Authors. Veterinary Dermatology published by John Wiley & Sons Ltd on behalf of the ESVD and ACVD.