Avaliação da atividade genotóxica do lapachol e β-lapachona e anticarcinogênica do lapachol, em células somáticas de Drosophila melanogaster

• Ano de defesa: 2010
• Autor(a) principal: Costa, Wender Ferreira
• Tipo de documento: Tese
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal de Uberlândia; BR; Programa de Pós-graduação em Genética e Bioquímica; Ciências Biológicas; UFU
• Palavras-chave em Português: Drosophila melanogaster; Lapachol; Epitélio - Câncer; Epitélio Câncer Tratamento; Naftoquinonas; Topoisomerase; Doxorrubicina; Wing spot test; SMART; Doxorubicin; Cytochrome P450; CNPQ::CIENCIAS BIOLOGICAS::GENETICA
• Link de acesso: https://repositorio.ufu.br/handle/123456789/15712

This study investigated the genotoxicity of Lapachol (LAP) evaluated by wing spot test of Drosophila melanogaster in the descendants from standard (ST) and high bioactivation (HB) crosses. This assay detects the loss of heterozygosity of marker genes expressed phenotypically on the fly s wings. Drosophila has extensive genetic homology to mammals, which makes it a suitable model organism for genotoxic investigations. Larvae of three days were used, resulting from ST cross (females flr3 /TM3, Bds x males mwh/mwh), with basal levels of the cytochrome P450 and larvae of high metabolic bioactivity capacity (HB cross) (females ORR; flr3/ TM3, Bds x males mwh/mwh). The results showed that LAP is a promutagen, exhibiting genotoxic activity in larvae from the HB cross, in other words, there is an increase in the frequency of spots occurring only in individuals with a high level of the cytochrome P450. Results also indicate that recombinogenicity is the main genotoxic event induced by LAP.