RESUMEN
Abstract The aim of this study was to evaluate the immunoexpression of glucose transporters 1 (GLUT-1) and 3 (GLUT-3) in keratocystic odontogenic tumors associated with Gorlin syndrome (SKOTs) and non-syndromic keratocystic odontogenic tumors (NSKOTs), and to establish correlations with the angiogenic index. Seventeen primary NSKOTs, seven recurrent NSKOTs, and 17 SKOTs were selected for the study. The percentage of immunopositive cells for GLUT-1 and GLUT-3 in the epithelial component of the tumors was assessed. The angiogenic index was determined by microvessel count. The results were analyzed statistically using the nonparametric Kruskal-Wallis test and Spearman’s correlation test. High epithelial immunoexpression of GLUT-1 was observed in most tumors (p = 0.360). There was a higher frequency of negative cases for GLUT-3 in all groups. The few GLUT-3-positive tumors exhibited low expression of this protein in epithelial cells. No significant difference in the angiogenic index was observed between groups (p = 0.778). GLUT-1 expression did not correlate significantly with the angiogenic index (p > 0.05). The results suggest that the more aggressive biological behavior of SKOTs when compared to NSKOTs may not be related to GLUT-1 or GLUT-3 expression. GLUT-1 may play an important role in glucose uptake by epithelial cells of KOTs and this process is unlikely related to the angiogenic index. GLUT-1 could be a potential target for future development of therapeutic strategies for KOTs.
Asunto(s)
Humanos , Síndrome del Nevo Basocelular/patología , Transportador de Glucosa de Tipo 1/análisis , Transportador de Glucosa de Tipo 3/análisis , Neovascularización Patológica/patología , Quistes Odontogénicos/patología , Tumores Odontogénicos/patología , Síndrome del Nevo Basocelular/metabolismo , Células Epiteliales/patología , Inmunohistoquímica , Quistes Odontogénicos/química , Tumores Odontogénicos/química , Adhesión en Parafina , Valores de Referencia , Estadísticas no ParamétricasRESUMEN
Com o objetivo de estabelecer as características imunocitoquímicas de folículos pericoronários, cistos dentígeros e queratocistos odontogênicos, foram selecionados dos arquivos do Laboratório de Anatomia Patológica do Departamento de Patologia da Faculdade de Odontologia de Bauru USP, dez casos de folículos pericoronários com epitélio reduzido do orgäo do esmalte, dez casos de folículos pericoronários com metaplasia escamosa, dez casos de cistos dentígeros e dez casos de queratocistos odontogênicos, submetidos a evidenciaçäo imunocitoquímica de um painel constituído dos seguintes marcadores: citoqueratina de alto peso molecular, citoqueratina de baixo peso molecular, laminina, fibronectina, colágeno IV, vimentina e proteína S100. A partir dos resultados obtidos pudemos concluir que o padräo imunocitoquímico das 4 condiçöes estudadas permite uma diferenciaçäo diagnóstica entre folículos pericoronários, cistos dentígeros e queratocistos odontogênicos, utilizando-se a marcaçäo da proteína S100. A diferenciaçäo pela marcaçäo com a proteína S100 pode ser complementada pela evidenciaçäo das células de Langerhans, que caracteristicamente estäo presentes nos revestimentos epiteliais dos cistos dentígeros