A comparative study of expression of Fc receptors in relation to the autoantibody-mediated immune response and neutrophil elastase expression in autoimmune blistering dermatoses

• Main Authors: Justyna Gornowicz-Porowska, Agnieszka Seraszek-Jaros, Monika Bowszyc-Dmochowska, Elżbieta Kaczmarek, Paweł Pietkiewicz, Paweł Bartkiewicz, Marian Dmochowski
• Format: Article
• Language: English
• Published: Termedia Publishing House 2017-09-01
• Series: Polish Journal of Pathology
• Subjects: receptors; Fc; skin diseases; vesiculobullous
• Online Access: https://www.termedia.pl/A-comparative-study-of-expression-of-Fc-receptors-in-relation-to-the-autoantibody-mediated-immune-response-and-neutrophil-elastase-expression-in-autoimmune-blistering-dermatoses,55,30485,1,1.html
• ISSN: 1233-9687; 2084-9869

Here we investigated the cutaneous CD32A and CD89 expression in relation to the neutrophil elastase (NE) expression and serum level of anti-desmoglein 1 and 3 (DSG1/DSG3) IgG in pemphigus, anti-BP180/BP230 IgG in bullous pemphigoid (BP), anti-gliadin nonapeptides (npG), tissue (tTG), and epidermal transglutaminases (eTG) IgA in dermatitis herpetiformis (DH). The examined material consisted of skin/mucosal tissues and sera. In total, 87 patients were studied. Immunohistochemistry on paraffin-embedded sections with quantitative digital morphometry was used to measure the intensity of CD32A/CD89/NE expressions. Levels of anti-DSG1/DSG3 IgG, anti-BP180/BP230 IgG, and anti-npG/tTG/eTG IgA were evaluated with ELISAs. CD32A was abundantly expressed in cutaneous lesions in pemphigus and BP. We found no statistically significant correlation between the CD32A/CD89 and NE expression intensities in pemphigus, BP, and DH. There was a significant correlation between CD89 expression and anti-npG IgA in DH. Our results revealed a lack of correlation between CD32A expressions and anti-DSG1/DSG3 IgG levels in pemphigus, anti-BP180/BP230 IgG in BP as well as CD89 expression and anti-tTG/eTG IgA in DH. CD89 seems to be linked with gluten intolerance in DH rather than with proteolytic destruction of dermal-epidermal junction. CD32A appears to play an important role in mediating skin injury in pemphigus and BP, but probably independently from specific autoantibodies.