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Immune‐expression of HSP27 and IL‐10 in recurrent aphthous ulceration
Author(s) -
Miyamoto Jr Nelson T.,
Borra Ricardo Carneiro,
Abreu Marilda,
Weckx Luc Louis Maurice,
Franco Marcello
Publication year - 2008
Publication title -
journal of oral pathology and medicine
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.887
H-Index - 83
eISSN - 1600-0714
pISSN - 0904-2512
DOI - 10.1111/j.1600-0714.2008.00665.x
Subject(s) - medicine , immune system , cytokine , proinflammatory cytokine , hsp27 , lesion , immunology , immunohistochemistry , oral mucosa , hyperplasia , colitis , pathology , heat shock protein , inflammation , hsp70 , biology , biochemistry , gene
Background: Recently, abnormal cellular immune response has been considered responsible for the oral lesion in the recurrent aphthous ulceration (RAU). For reasons not yet defined, antigens of the oral microbiota would trigger abnormal Th1 immune response against epithelial cells. On the other hand, studies have demonstrated that heat shock proteins (HSP) can block the production of proinflammatory cytokine through inhibition of NF‐κB and mitogen‐activated protein kinase pathways or activate anti‐inflammatory cytokines and therefore control the magnitude of the immune response. HSP27 has been considered a powerful inductor of IL‐10, a major inhibitor of Th1 response. Methods: Using immunohistochemistry, we studied the expression and location of HSP27 and IL‐10 in ulcerated lesions clinically diagnosed as RAU ( n = 27) and to compare it with that of oral clinically normal mucosa (CT; n = 6) and of other inflammatory chronic diseases such as oral fibrous inflammatory hyperplasia (FIH; n = 18), Crohn’s disease (CD; n = 10) and ulcerative colitis (UC; n = 9). Results: A lower proportion of HSP27‐positive epithelial cells in RAU and CD were observed when compared with CT and FIH ( P < 0.001**; P = 0.013**). A lower proportion of IL‐10‐positive interstitial cells in RAU was observed when compared with FIH, UC, CT and CD ( P < 0.001**; P < 0.001**; P < 0.001**; P = 0.034*). Conclusion: Altogether the data suggest that a reduced cellular expression of HSP27 and IL‐10 in RAU might be related with the aetiopathogenesis of the ulcerated oral lesions.