Influência das células mioepiteliais neoplásicas benignas de adenoma pleomórfico na produção de MMPs -1, -2, - 8, -9 e -13 por células epiteliais malignas e sua possível relação com o índice de invasão

• Ano de defesa: 2015
• Autor(a) principal: Rodrigues, Neliana Salomão [UNESP]
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Estadual Paulista (Unesp)
• Palavras-chave em Português: Glândulas salivares; Metaloproteases; Adenocarcinoma; Salivary glands
• Link de acesso: http://hdl.handle.net/11449/134198; http://www.athena.biblioteca.unesp.br/exlibris/bd/cathedra/28-01-2016/000857811.pdf

The myoepithelial cell is a component of various glandular organs, including salivary and mammary glands, which aids in the excretion of glandular content, also acting in embryogenesis and morphogenesis of the gland. In addition to their normal functions, tumor suppressive action has been attributed to this cell. Using as a model the carcinoma ex pleomorphic adenoma, malignant neoplasm from the malignancy of pleomorphic adenoma cells (PA), the influence of neoplastic myoepithelial cells in the invasive behavior of malignant epithelial cells in an in vitro study was studied. Therefore, cells of oral squamous cell carcinoma (CAL 27, ATCC) and ductal carcinoma (HS578T, ATCC) were cultured in invasion chambers on matrigel with conditioned media of myoepithelial cells of PA for 96 hours. We calculated the invasion índex, quantified the secretion of MMP-1, -2, -8, -9 and -13 and TIMP-1 and -2 by ELISA and the proteolytic activity by zymography. The results were statistically analyzed and showed that the conditioned media of myoepithelial cells caused increased invasive potential of both malignant cells. The conditioned media showed, in general, larger amounts and proteolytic activities of MMP-1 and -2 and amounts of TIMP-1 and -2 than the malignant cells. MMP-8 was decreased in all samples and MMP-9 and -13 were not detected. Under these experimental conditions, myoepithelial cells caused an increase in invasive behavior of malignant epithelial cells and MMP-1 and -2 produced by them may be involved in the process