Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.18/2720
Título: Genotoxicity of Microcystin-LR in In Vitro and In Vivo Experimental Models
Autor: Dias, Elsa
Louro, Henriqueta
Pinto, Miguel
Santos, Telma
Antunes, Susana
Pereira, Paulo
Silva, Maria João
Palavras-chave: Environmental Genotoxicity
Genotoxicidade Ambiental
Ar e Saúde Ocupacional
Data: 18-Mai-2014
Editora: Hindawi Publishing Corporation
Citação: Biomed Res Int. 2014;2014:949521. doi: 10.1155/2014/949521. Epub 2014 May 18
Resumo: Microcystin-LR (MCLR) is a cyanobacterial toxin known for its acute hepatotoxicity. Despite being recognized as tumour promoter, its genotoxicity is far from being completely clarified, particularly in organs other than liver. In this work, we used the comet and/or the micronucleus (MN) assays to study the genotoxicity of MCLR in kidney- (Vero-E6) and liver-derived (HepG2) cell lines and in blood cells from MCLR-exposed mice. MCLR treatment (5 and 20 𝜇M) caused a significant induction in the MN frequency in both cell lines and, interestingly, a similar positive effect was observed in mouse reticulocytes (37.5 𝜇gMCLR/kg, i.p. route). Moreover, the FISH-based analysis of the MN content (HepG2 cells) suggested that MCLR induces both chromosome breaks and loss. On the other hand, the comet assay results were negative in Vero-E6 cells and in mouse leukocytes, with the exception of a transient increase in the level of DNA damage 30 minutes after mice exposure. Overall, the present findings contributed to increase the weight of evidence in favour of MCLR genotoxicity, based on its capacity to induce permanent genetic damage either in vitro or in vivo. Moreover, they suggest a clastogenic and aneugenic mode of action that might underlie a carcinogenic effect.
Peer review: yes
URI: http://hdl.handle.net/10400.18/2720
DOI: 949521
ISSN: 2314-6133
Versão do Editor: http://www.hindawi.com/journals/bmri/2014/949521/
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DSA - Artigos em revistas internacionais

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