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O uso de interferência por RNA para a análise da função do gene E2F1 na progressão do ciclo celular em células tumorais / Use of RNA interference for the analysis of E2F1 gene function in cell cycle progression in tumor cells

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Publico-00376f.pdf: 1677823 bytes, checksum: d93d3b40f2c273e474e7fef525f351c8 (MD5) / E2F1 pertence a uma família de fatores de transcrição e possui papel central no controle da expressão de genes relacionados à regulação da proliferação celular, pois ativa genes que participam da síntese de DNA. A atividade de E2F1 é regulada por meio da proteína pRB que, quando fosforilada por quinases associadas à ciclinas (Ciclinas/CDK) libera este fator de transcrição, promovendo assim a proliferação. A disfunção da complexa via de regulação da divisão celular pode acarretar em proliferação exacerbada, sendo a superexpressão de E2F1 bastante comum em diferentes tipos de tumores. Este fenômeno pode ser o principal fator para a alta proliferação de células tumorais. Desta forma, a inibição da atividade de E2F1 através de RNA de interferência (RNAi) pode ser promissora como tratamento para a diminuição da proliferação de células de melanoma. Assim sendo, objetiva-se neste trabalho inativar por RNAi o gene E2f1 em células B16mCAR, derivadas de melanoma de C57BL/6 e que superexpressam o receptor CAR, e averiguar os efeitos de sua ausência na proliferação celular, tanto in vitro como in vivo. / E2F1 belongs to a family of transcription factors and plays a central role in controlling the expression of genes related to regulation of the cell-cycle progression, since it activates genes involved in DNA synthesis. The activity of E2F1 is regulated by pRB protein, that when phosphorylated by cyclin-dependent kinases cyclins (Cyclins/CDK) releases this transcription factor, thereby promoting proliferation. The dysfunction of the complex regulatory pathway of cell division can lead to excessive proliferation, which overexpression of E2F1 is quite common in different types of tumors. This phenomenon may be the main factor for the high proliferation of tumor cells. Thus, inhibition of E2F1 activity by RNA interference (RNAi) may be promising as a treatment for decreased proliferation of melanoma cells. Therefore, the purpose of this work is the inactivation of the E2f1 gene through RNAi in B16mCAR cells, derived from C57BL/6’s melanoma and overexpresses the CAR receptor, and also verifies the effects of its absence on cell proliferation in vitro and in vivo. / TEDE / BV UNIFESP: Teses e dissertações

Identiferoai:union.ndltd.org:IBICT/oai:repositorio.unifesp.br:11600/9874
Date27 October 2010
CreatorsOliveira, Maria Theresa de [UNIFESP]
ContributorsUniversidade Federal de São Paulo (UNIFESP), Monteiro, Hugo Pequeno [UNIFESP]
PublisherUniversidade Federal de São Paulo (UNIFESP)
Source SetsIBICT Brazilian ETDs
LanguagePortuguese
Detected LanguageEnglish
Typeinfo:eu-repo/semantics/publishedVersion, info:eu-repo/semantics/masterThesis
Format137 p.
Sourcereponame:Repositório Institucional da UNIFESP, instname:Universidade Federal de São Paulo, instacron:UNIFESP
Rightsinfo:eu-repo/semantics/openAccess

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