Toxicological assessment of PEGylated single-walled carbon nanotubes in early developing zebrafish.
Toxicol Appl Pharmacol
; 347: 54-59, 2018 05 15.
Article
en En
| MEDLINE
| ID: mdl-29609001
Functionalization of single-walled carbon nanotubes (SWCNT) with polyethylene glycol (PEG) is among the most promising strategies to avoid SWCNT aggregation in aqueous media, improving its interactions with biological systems. However, the best molecular PEG weight and functionalization strategy remain under investigation. In this work we assessed the toxicological effects of SWCNT functionalized with PEG at 600â¯Da in zebrafish embryos. Embryos were exposed to SWCNT at 0.01, 0.1 and 1â¯mg/L from 3 to 96â¯h post-fertilization (hpf). At the highest concentration, SWCNT led to toxic effects at several endpoints, including mortality, delayed hatching, malformations, reduced body length, increased ROS production and DNA damage. Even with these effects, SWCNT could not be detected within the bodily tissues of the larvae. Our results give evidence that the tested PEGylation approach was unsuitable to avoid SWCNT aggregation in aqueous media, and that SWCNT can induce toxicity even without being absorbed by the organism by obstructing the chorion pores.
Palabras clave
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Polietilenglicoles
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Toxicología
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Pez Cebra
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Nanotubos de Carbono
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Embrión no Mamífero
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Larva
Límite:
Animals
Idioma:
En
Revista:
Toxicol Appl Pharmacol
Año:
2018
Tipo del documento:
Article
Pais de publicación:
Estados Unidos