eISSN: 1644-4124
ISSN: 1426-3912
Central European Journal of Immunology
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vol. 39

Clinical immunology
Cutaneous expressions of interleukin-6 and neutrophil elastase as well as levels of serum IgA antibodies to gliadin nonapeptides, tissue transglutaminase and epidermal transglutaminase: implications for both autoimmunity and autoinflammation involvement in dermatitis herpetiformis

Justyna Gornowicz-Porowska
Monika Bowszyc-Dmochowska
Agnieszka Seraszek-Jaros
Elżbieta Kaczmarek
Paweł Pietkiewicz
Marian Dmochowski

(Centr Eur J Immunol 2014; 39 (3): 331-337)
Online publish date: 2014/10/14
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Introduction: Dermatitis herpetiformis (DH) seems to be a chronic immune-mediated inflammatory disease of partially known origin. In light of its known biological functions and its involvement in tissue pathology in other disease states, particularly in nickel-induced allergic contact dermatitis coexisting with DH, it would appear that the central and peripheral response by neutrophils and their mediators (e.g. neutrophil elastase – NE) in DH may be partially mediated by interleukin-6 (IL-6).

The aim of the study was to assess the role of IL-6 in DH lesions by examining the relationships between IL-6/NE cutaneous expression and levels of serum anti-nonapeptides of gliadin (npG) IgA, anti-tissue transglutaminase (tTG) immunoglobulin A (IgA), anti-epidermal transglutaminase (eTG) IgA in DH.

Material and methods: In total, 24 DH patients having IgA cutaneous deposition were studied. Immunohistochemistry on paraffin-embedded sections with quantitative digital morphometry was used to measure the intensity of IL-6 and NE cutaneous expressions. Levels of serum anti-npG IgA, anti-tTG IgA and anti-eTG IgA were evaluated with ELISA.

Results: We found no statistically significant correlation between the NE and IL-6 expression intensities. Our results revealed also a lack of correlations between NE/IL-6 expressions and levels of anti-npG IgA, anti-tTG IgA, anti-eTG IgA in DH. However, the IL-6 expression level was significantly lower than that of NE.

Conclusions: The lack of correlations suggested no substantial interactions between IL-6, NE, IgA/npG, IgA/tTG or IgA/eTG in DH. Presented results might indicate the heterogenetic nature of DH pathogenesis suggesting further that both autoimmune and autoinflammatory phenomena may be involved in DH cutaneous pathology.

dermatitis herpetiformis, interleukin-6, neutrophil elastase, autoimmunity

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