Análise celular e molecular da ação do peptídeo Ac2-26 da proteína anti-inflamatória Anexina A nas células de carcinoma de colo de útero

• Ano de defesa: 2015
• Autor(a) principal: Moreira, Heloisa Trindade [UNESP]
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Estadual Paulista (Unesp)
• Palavras-chave em Português: Genética; Expressão gênica; Colo uterino - Câncer; Anexina A1; Reação em cadeia da polimerase; Celulas - Cultura e meios de cultura
• Link de acesso: http://hdl.handle.net/11449/127730

INTRODUCTION: Cervical cancer is the second most common cancer in women worldwide and is the fourth leading cause of cancer deaths in developing countries. The cervical carcinogenesis is related to genetic alterations, infection by the Human Papillomavirus (HPV), angiogenesis and inflammation. Annexin-A1 (ANXA1), 37 kDa protein, which is expressed by tumor cells acts as a modulator of the inflammatory process. Evidence suggests that this protein family may have, in addition to its important role in the inflammatory process, significant involvement in cancer, through signaling cascades that include genes related to cell cycle, differentiation and apoptosis. OBJECTIVES: Because of the importance of the anti-inflammatory effect of Ac2-26 peptide in carcinogenic cells, this study aimed to investigate the influence of anti-inflammatory in SiHa cells. MATERIALS AND METHODS: SiHa cell line (derived from squamous cell carcinoma of cervix), treated with Ac2-26 peptide at a concentration of 10μg/mL for 2, 4, 24, 48 and 72 hours. We evaluate morphology; cell proliferation and migration; apoptosis, late apoptosis and necrosis; pro-inflammatory cytokines; protein expression and COX-2 genes, EP3, EP4, MMP2, MMP9, TIMP1 and TIMP2; control and the samples treated with the peptide Ac2-26, by light microscopy techniques, flow cytometry, magipix, Western blotting and quantitative PCR in real time. RESULTS: In cervical carcinoma cells observed that there was no change in cell morphology after treatment with peptide Ac2-26, however, there was a reduction in cell proliferation and migration. In the test flow cytometry there was no induction of apoptosis, late apoptosis or necrosis, but the test Magpix decreased interleukin 6 (IL-6) in SiHa cells treated with the peptide Ac2-26. The effect of treatment carried out with the exogenous protein did not affect the expression of Annexin A1 endogenous protein, but showed...