Increase in mitotic recombination in diploid cells of Aspergillus nidulans in response to ethidium bromide
Genet. mol. biol
;
26(3): 381-385, 2003. ilus, tab, graf
Artigo
em Inglês
| LILACS
| ID: lil-346332
ABSTRACT
Ethidium bromide (EB) is an intercalating inhibitor of topoisomerase II and its activities are related to chemotherapeutic drugs used in anti-cancer treatments. EB promotes several genotoxic effects in exposed cells by stabilising the DNA-enzyme complex. The recombinagenic potential of EB was evaluated in our in vivo study by the loss of heterozygosity of nutritional markers in diploid Aspergillus nidulans cells through Homozygotization Index (HI). A DNA repair mutation, uvsZ and a chromosome duplication DP (II-I) were introduced in the genome of tested cells to obtain a sensitive system for the recombinagenesis detection. EB-treated diploid cells had HI values significantly greater than the control at both concentrations (4.0 x 10-3 and 5.0 x 10-3 mM). Results indicate that the intercalating agent is potentially capable of inducing mitotic crossing-over in diploid A. nidulans cells
Texto completo:
DisponíveL
Índice:
LILACS (Américas)
Assunto principal:
Aspergillus nidulans
/
Etídio
/
Mitose
/
Antineoplásicos
Idioma:
Inglês
Revista:
Genet. mol. biol
Assunto da revista:
Genética
Ano de publicação:
2003
Tipo de documento:
Artigo
País de afiliação:
Brasil
Instituição/País de afiliação:
Universidade Estadual de Maringá/BR
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