Resumo
Para melhor compreensão do comportamento
biológico do mixoma odontogênico (MO),
imuno-histoquímica foi realizada em 31
amostras, utilizando marcadores relacionados
aos mecanismos de progressão tumoral
(adesão, angiogênese, apoptose, inflamação
e proliferação celular). Epitélio odontogênico
foi detectado em quatro amostras por CK19
e CD138, o último mostrou baixa expressão
na matriz extracelular (MEC) e alta em células
tumorais. A microdensidade vascular (MDV)
média foi de 7.51 e 5.35 vasos marcados
com CD34 e VEGF-A, respectivamente.
Uma alta expressão de Orosomucoide-1 e
Mast Cell Tryptase foi observada nas células
tumorais e na MEC. O MO mostrou
negatividade para Calretinina. O perfil
imuno-histoquímico mencionado acima, a
baixa expressão de Ki-67, Bcl-2 e p53 e a
relativamente baixa MDV, sugerem que a
atividade proliferativa, anti-apoptótica ou
angiogênica não representam os principais
mecanismos de crescimento do MO, os
quais poderiam estar associados com eventos
como imunomodulação e degradação da
MEC
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