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How much are microplastics harmful to the health of amphibians? A study with pristine polyethylene microplastics and Physalaemus cuvieri.
da Costa Araújo, Amanda Pereira; de Melo, Nathalie Ferreira Silva; de Oliveira Junior, Admilton Gonçalves; Rodrigues, Fernando Postalli; Fernandes, Thiago; de Andrade Vieira, Julya Emmanuela; Rocha, Thiago Lopes; Malafaia, Guilherme.
Afiliação
  • da Costa Araújo AP; Biological Research Laboratory, Post-Graduation Program in Conservation of Cerrado Natural Resources, Goiano Federal Institute - Urutaí Campus, Urutaí, GO, Brazil.
  • de Melo NFS; São Leopoldo Mandic Research Center and Institute, Araras, SP, Brazil.
  • de Oliveira Junior AG; Laboratory of Electron Microscopy and Microanalysis, State University of Londrina, Londrina, PR, Brazil.
  • Rodrigues FP; Biological Research Laboratory, Post-Graduation Program in Conservation of Cerrado Natural Resources, Goiano Federal Institute - Urutaí Campus, Urutaí, GO, Brazil.
  • Fernandes T; Laboratory of Electron Microscopy and Microanalysis, State University of Londrina, Londrina, PR, Brazil.
  • de Andrade Vieira JE; Biological Research Laboratory, Post-Graduation Program in Conservation of Cerrado Natural Resources, Goiano Federal Institute - Urutaí Campus, Urutaí, GO, Brazil.
  • Rocha TL; Laboratory of Environmental Biotechnology and Ecotoxicology, Institute of Tropical Pathology and Public Health, Federal University of Goiás, Goiânia, GO, Brazil; Post-Graduation Program in Genetics and Molecular Biology, Institute of Biological Sciences, Federal University of Goiás, Goiânia, GO, Bra
  • Malafaia G; Biological Research Laboratory, Post-Graduation Program in Conservation of Cerrado Natural Resources, Goiano Federal Institute - Urutaí Campus, Urutaí, GO, Brazil; Post-Graduation Program in Genetics and Molecular Biology, Institute of Biological Sciences, Federal University of Goiás, Goiânia, GO, B
J Hazard Mater ; 382: 121066, 2020 01 15.
Article em En | MEDLINE | ID: mdl-31473515
Microplastics (MPs) are critical emerging pollutants found in the environment worldwide; however, its toxicity in aquatic in amphibians, is poorly known. Thus, the aim of the present study is to assess the toxicological potential of polyethylene microplastics (PE MPs) in Physalaemus cuvieri tadpoles. According to the results, tadpoles' exposure to MP PE at concentration 60 mg/L for 7 days led to mutagenic effects, which were evidenced by the increased number of abnormalities observed in nuclear erythrocytes. The small size of erythrocytes and their nuclei area, perimeter, width, length, and radius, as well as the lower nucleus/cytoplasm ratio observed in tadpoles exposed to PE MPs confirmed its cytotoxicity. External morphological changes observed in the animal models included reduced ratio between total length and mouth-cloaca distance, caudal length, ocular area, mouth area, among others. PE MPs increased the number of melanophores in the skin and pigmentation rate in the assessed areas. Finally, PE MPs were found in gills, gastrointestinal tract, liver, muscle tissues of the tail and in the blood, a fact that confirmed MP accumulation by tadpoles. Therefore, the present study pioneering evidenced how MPs can affect the health of amphibians.
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Texto completo: 1 Base de dados: MEDLINE Assunto principal: Anuros / Poluentes Químicos da Água / Polietileno / Microplásticos / Larva / Mutagênicos Limite: Animals Idioma: En Revista: J Hazard Mater Assunto da revista: SAUDE AMBIENTAL Ano de publicação: 2020 Tipo de documento: Article País de afiliação: Brasil

Texto completo: 1 Base de dados: MEDLINE Assunto principal: Anuros / Poluentes Químicos da Água / Polietileno / Microplásticos / Larva / Mutagênicos Limite: Animals Idioma: En Revista: J Hazard Mater Assunto da revista: SAUDE AMBIENTAL Ano de publicação: 2020 Tipo de documento: Article País de afiliação: Brasil