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Salvador; s.n; 2015. 89 p. ilus, tab.
Thesis in Portuguese | LILACS | ID: biblio-1000977

ABSTRACT

O adenoma pleomórfico (AP), o carcinoma mucoepidermóide (CME) e o carcinoma adenóide cístico (CAC) representam tumores frequentes em glândula salivar. A via de sinalização Sonic Hedgehog (Hh) e o Transdutor de sinal e ativador da transcrição 3 (STAT3) desempenham funções importantes na proliferação celular, favorecendo o desenvolvimento tumoral e a proteína MCM3 tem sido considerada uma nova classe de marcadores de proliferação celular. Portanto, o presente trabalho propõe-se a estudar componentes da via Hh, bem como o STAT3 e o MCM3 em neoplasias de glândula salivar, na tentativa de adicionar informações sobre as características biológicas dessas neoplasias. Foram utilizados 9 casos de AP, 17 casos de CAC e 20 casos de CME e, por meio da técnica imunoistoquímica, realizou-se a detecção das seguintes proteínas: SHH, GLI1, SUFU, HHIP, STAT3 e MCM3. No AP, observou-se alta expressão citoplasmática de SHH e SUFU, e baixa expressão de STAT3 e MCM3. No CAC, observou-se alta expressão de GLI1, HHIP e STAT3 e baixa expressão de SHH, SUFU e MCM3. No CME, observou-se alta expressão de SHH, GLI1, SUFU e HHIP e baixa expressão de STAT3 e MCM3. Quando comparado entre os tipos tumorais, observou-se diferença estatisticamente significante para expressão de SHH (p=0.0064), STAT3 (p=0.0003) e MCM3 (p=0.0257)...


The pleomorphic adenoma (PA), mucoepidermoid carcinoma (MEC) and the adenoid cystic carcinoma (ACC) are common tumors arising from salivary glands. The Sonic Hedgehog signaling pathway (Hh) and signal transducer and activator of transcription 3 (STAT3) play important roles in cell proliferation, favoring tumor growth. The MCM3 protein has been considered as a novel class of cell proliferation markers. The aim of this investigation was to study components of the Hh pathway, as well as STAT3 and MCM3 in salivary gland neoplasms in an attempt to add information about the biological characteristics of these neoplasms. We used 9 cases of PA, 17 cases of ACC and 20 cases of MEC. Using immunohistochemistry, were investigated: SHH, GLI1, Sufu, HHIP, STAT3 and MCM3. In PA, there was high expression of cytoplasmic SHH and Sufu, and low expression of STAT3 and MCM3. In the ACC, there was high expression of GLI1, HHIP and STAT3 and low expression of SHH, SUFU and MCM3. In the MEC, we observed high expression of SHH, GLI1, SUFU and HHIP and low expression of STAT3 and MCM3. There was a statistically significant difference between SHH (p=0.0064), STAT3 (p=0.0003) and MCM3 (p=0.0257) when all tumors were compared...


Subject(s)
Humans , Adenoma/immunology , Carcinoma, Adenoid Cystic/diagnosis , Carcinoma, Adenoid Cystic/epidemiology , Carcinoma, Adenoid Cystic/immunology , Carcinoma, Adenoid Cystic/prevention & control , Carcinoma, Adenoid Cystic/blood , Carcinoma, Mucoepidermoid/complications , Carcinoma, Mucoepidermoid/pathology
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