title: Genotoxic evaluation of extracts from Aplysina fulva, a Brazilian marine sponge.
abstract: A range of biologically active secondary metabolites with pharmacological application has been reported to occur in marine sponges. The present study was undertaken to provide a set of data on the safety of a hydro-alcoholic extract (ALE) and an aqueous fraction (AQE) from Aplysina fulva Pallas, 1766 (Aplysinidae, Verongida, Porifera). Salmonella typhimurium strains TA97, TA98, TA100 and TA102, Escherichia coli strains PQ65, OG40, OG100, PQ35 and PQ37 and Balb/c 3T3 mouse fibroblasts were used to detect induction of DNA lesions by ALE and AQE. Assays used for these analyses were a bacterial (reverse) mutation assay (Ames test), the SOS-chromotest and the comet assay. Both extracts presented identical infrared 2-oxazolidone spectra. ALE treatment induced a higher frequency of type-4 comets, indicative of increasing DNA migration, in the alkaline comet assay. ALE also induced a weak genotoxic effect, as expressed by the induction factor (IF) values in the test with E. coli strain PQ35 (IF=1.5) and by cytotoxic effects in strains PQ35, PQ65 and PQ37. Positive SOS induction (IF=1.7) was detected in strain PQ37 treated with diluted AQE. No genotoxic effects were observed in strains PQ35, PQ65, OG40 and OG 100 after treatment with AQE dilutions. Using the bacterial (reverse) mutation test and survival assays with or without S9 mix, after 60min of pre-incubation, we observed for strain TA97 treated with ALE a weak mutagenic response (MI=2.2), while cytotoxic effects were seen for strains TA98, TA100 and TA102. AQE did not show mutagenic activity in any of the strains tested, but a weak cytotoxic effect was noted in strain TA102. Our data suggest that both ALE and AQE from A. fulva induce DNA breaks leading to cytotoxicity and mutagenicity under the conditions used.
authors.affiliation: Department of Cellular Biology, Division of Genetics, Salzburg University, Salzburg A5020, Austria. aiub@hotmail.com
authors.forename: Claudia
authors.initials: C
authors.lastname: Aiub
authors.forename: Ana
authors.initials: A
authors.lastname: Giannerini
authors.forename: Flavia
authors.initials: F
authors.lastname: Ferreira
authors.forename: José
authors.initials: J
authors.lastname: Mazzei
authors.forename: Luiza
authors.initials: L
authors.lastname: Stankevicins
authors.forename: Gisele
authors.initials: G
authors.lastname: Lobo-Hajdu
authors.forename: Pedro
authors.initials: P
authors.lastname: Guimarães
authors.forename: Eduardo
authors.initials: E
authors.lastname: Hajdu
authors.forename: Israel
authors.initials: I
authors.lastname: Felzenszwalb
mesh_terms: D016475:3T3 Cells; D000818:Animals; D020552:Comet Assay / Q000379:methods; D053960:DNA Breaks; D004269:DNA, Bacterial / Q000187:drug effects / Q000235:genetics; D004926:Escherichia coli / Q000187:drug effects / Q000235:genetics; D051379:Mice; D008807:Mice, Inbred BALB C; D050296:Microbial Viability / Q000187:drug effects / Q000235:genetics; D009152:Mutagenicity Tests / Q000379:methods; D009153:Mutagens / Q000633:toxicity*; D011161:Porifera / Q000737:chemistry*; D051381:Rats; D017207:Rats, Sprague-Dawley; D013014:SOS Response, Genetics / Q000187:drug effects* / Q000235:genetics; D012486:Salmonella typhimurium / Q000187:drug effects / Q000235:genetics
chemical_list: D004269:DNA, Bacterial; D009153:Mutagens