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DNA methylation patterns of genes related to immune response in the different clinical forms of oral lichen planus
Author(s) -
Cruz Aline Fernanda,
Resende Renata Gonçalves,
Lacerda Júlio César Tanos,
Pereira Núbia Braga,
Melo Leonardo Augusto,
Diniz Marina Gonçalves,
Gomes Carolina Cavalieri,
Gomez Ricardo Santiago
Publication year - 2018
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/jop.12645
Subject(s) - oral lichen planus , dna methylation , methylation , immune system , epigenetics , biology , pathogenesis , immunology , oral mucosa , gene , pathology , gene expression , medicine , genetics
Background The oral lichen planus is a chronic inflammatory disease. Although its aetiology is not well understood, the role of T lymphocytes in its inflammatory events is recognised. Identifying the epigenetic mechanisms involved in the pathogenesis of this immune‐mediated condition is fundamental for understanding the inflammatory reaction that occurs in the disease. The purpose of this work was to evaluate the methylation pattern of 21 immune response‐related genes in the different clinical forms of oral lichen planus. Methods A cross‐sectional study was performed to analyse the DNA methylation patterns in three distinct groups of oral lichen planus: (i) reticular/plaque lesions; (ii) erosive lesions; (iii) normal oral mucosa (control group). After DNA extraction from biopsies, the samples were submitted to digestions by methylation‐sensitive and methylation‐dependent enzymes and double digestion. The relative percentage of methylated DNA for each gene was provided using real‐time polymerase chain reaction arrays. Results Hypermethylation of the STAT 5A gene was observed only in the control group (59.0%). A higher hypermethylation of the ELANE gene was found in reticular/plaque lesions (72.1%) compared to the erosive lesions (50.0%). Conclusion Our results show variations in the methylation profile of immune response‐related genes, according to the clinical type of oral lichen planus after comparing with the normal oral mucosa. Further studies are necessary to validate these findings using gene expression analysis.