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Title: | UVA/UVB-induced genotoxicity and lesion repair in Colossoma macropomum and Arapaima gigas Amazonian fish |
Authors: | Groff, Aline Aparecida Silva, J. da Nunes, Emilene Arusievicz Ianistcki, Martus Guecheva, Temenouga Nikolova Oliveira, Alzira Miranda de Oliveira, Christiane Patricia Feitosa de Val, Adalberto Luis Henriques, João Antonio Pêgas |
Keywords: | Animals Cell Animals Experiment Arapaima Gigas Colossoma Macropomum Comet Assay Concentration Response Controlled Study Dna Damage Dna Repair Dosimetry Erythrocyte Fish Genotoxicity Micronucleus Test Nonhuman Priority Journal Radiation Exposure Radiation Injury Repair Radiation Response Radiosensitivity Ultraviolet A Radiation Ultraviolet B Radiation Animal Comet Assay Dna Damage Dna Repair Erythrocytes Fishes Mutagenicity Tests Ultraviolet Rays Arapaima Gigas Colossoma Macropomum Colossoma Marcopomum |
Issue Date: | 2010 |
metadata.dc.publisher.journal: | Journal of Photochemistry and Photobiology B: Biology |
metadata.dc.relation.ispartof: | Volume 99, Número 2, Pags. 93-99 |
Abstract: | Ultraviolet radiation is known to cause adverse effects to aquatic species and aquatic environments. The fish Colossoma macropomum (tambaqui) and Arapaima gigas (pirarucu) live in the Amazon basin, near the Equator, and thus receive high intensity of ultraviolet radiation. Deforestation further aggravates the situation by reducing shade at ground level. The aim of this study was to evaluate the genotoxic effects of UVA and UVB radiation on erythrocytes of tambaqui and pirarucu fish using Micronuclei test and Comet assay. Our study showed that UV radiation caused DNA damage in both species as detected by Comet assay. In addition, there were differences in response to genotoxicity between both species, which are possibly related to their evolutionary history. Tambaqui fish exposed to ultraviolet radiation for different periods presented clear dose-response in DNA damage profile. Significant damage repair was observed 24. h after cessation of ultraviolet radiation exposure. At the test conditions used, no significant increase in micronucleated cells was observed in tambaqui and pirarucu fish. Tambaqui proved to be more sensitive to ultraviolet radiation than Pirarucu, as detected by Comet assay, showing statistically higher baseline DNA damage. The present results demonstrated that alkaline Comet assay was very sensitive for detecting the UV-induced genotoxicity during the short exposure period in our study. In addition, the present study also suggests that tambaqui and pirarucu fish are useful sentinel organisms, as their UV sensitivity allows them to be effective monitors of biological hazards in the Amazon region. © 2010 Elsevier B.V. |
metadata.dc.identifier.doi: | 10.1016/j.jphotobiol.2010.02.011 |
Appears in Collections: | Artigos |
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