Estudo de biomarcadores relacionados à agressividade e invasividade em carcinoma de células escamosas oral

• Ano de defesa: 2015
• Autor(a) principal: Callegari, Eline Manhães Reid
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal do Espírito Santo; BR; Mestrado em Clinica Odontológica; Centro de Ciências da Saúde; UFES; Programa de Pós-Graduação em Clínica Odontológica
• Palavras-chave em Português: Laminin-332; Y2 Chain; Matrix metalloproteinase-9; Oral squamous cell carcinoma; Laminina-332; Cadeia γ2; Laminina; Metaloproteinase 9 da matriz; Carcinoma de células escamosas oral; Carcinoma de células escamosas; Marcadores biológicos; Odontologia; 616.314
• Link de acesso: http://repositorio.ufes.br/handle/10/8197

In tumorigenesis process, laminin-332 performs multiple biologic effects by γ2 chain, and MMP-9 acts disrupting extracellular components. We aimed to assess the molecular profile of γ2 chain and MMP-9 in leukoplakias oral high-risk, carcinoma in situ (CIS) and oral invasive carcinoma cell squamous (OSCC) and establish possible associations with clinicopathologic features. γ2 chain and MMP-9 expression were assessed by immunohistochemistry in 10 patients with high-risk malignancy lesions and 26 cases of invasive OSCC. The immunostaining of γ2 chain in high-risk lesions showed most cases with a continuous basement membrane, on the other hand the majority of invasive OSCC had a discontinuous membrane or absence. OSCC stromal cells showed a higher presence of MMP-9 compared to cases of high-risk lesions. The association between clinical and expression profile demonstrated that smokers with invasive OSCC had a higher expression of γ2 chain in epithelium and MMP-9 in invasive fronts. A higher expression of MMP-9 in stromal cells was associated with male patients, older than 60 years and diagnosed with invasive OSCC when compared with high-risk lesions. Our results indicate an association between clinical and microscopic features in oral lesions with high malignant potential and oral carcinomas, with a progressive change in γ2 chain and MMP-9 expression during tumorigenesis.