title: Inhibition of doxorubicin-induced mutagenicity by Baccharis dracunculifolia.
abstract: Baccharis dracunculifolia DC (Asteraceae), a native plant from Brazil, have been used as an antipyretic, stomachic and health tonic in Brazil. The objective of the present study was to investigate the potential mutagenic effect of B. dracunculifolia ethyl acetate extract (Bd-EAE) and its influence on the mutagenicity induced by the chemotherapeutic agent doxorubicin (DXR) using the rat bone marrow and peripheral blood micronucleus test. Wistar rats were divided into 10 treatment groups. Five groups received DXR (90 mg/kg body weight, b.w., intraperitoneally) to induce mutagenicity and three of these groups received a single oral dose of Bd-EAE at a concentration of 6, 12 or 24 mg/kg b.w. prior to DXR administration. A vehicle-treated control group and Bd-EAE control groups were also included. The results showed that Bd-EAE itself was not mutagenic, in the rat micronucleus assay. In animals treated with Bd-EAE and DXR, the number of MNPCEs was significantly decreased compared to animals receiving DXR alone. HPLC analysis of the extract obtained permitted the identification of the following phenolic compounds: caffeic acid, p-coumaric acid, aromadendrin-4'O-methyl ether, 3-prenyl-p-coumaric acid (drupanin), 3,5-diprenyl-p-coumaric acid (artepillin C) and baccharin. The putative antioxidant activity or the interference of one or more of the active compounds of Bd-EAE with mutagenic metabolic pathways may explain its effect on DXR mutagenicity.
authors: Universidade de Franca, Avenida Dr Armando Salles de Oliveira, 201-Parque Universitário, 14404-600 Franca, São Paulo, Brazil.
authors: Flávia Aparecida
authors: FA
authors: Resende
authors: Jacqueline Morais
authors: JM
authors: Alves
authors: Carla Carolina
authors: CC
authors: Munari
authors: Juliana Marques
authors: JM
authors: Senedese
authors: João Paulo B
authors: JP
authors: Sousa
authors: Jairo Kenupp
authors: JK
authors: Bastos
authors: Denise Crispim
authors: DC
authors: Tavares
mesh_terms: D000818:Animals; D000903:Antibiotics, Antineoplastic / Q000633:toxicity; D016587:Antimutagenic Agents / Q000494:pharmacology*; D031175:Baccharis; D004317:Doxorubicin / Q000633:toxicity*; D004353:Drug Evaluation, Preclinical; D015162:Micronucleus Tests; D010936:Plant Extracts / Q000494:pharmacology / Q000633:toxicity*; D051381:Rats; D017208:Rats, Wistar
chemical_list: D000903:Antibiotics, Antineoplastic; D016587:Antimutagenic Agents; D010936:Plant Extracts; D004317:Doxorubicin