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Exposure of juvenile Danio rerio to aged TiO(2) nanomaterial from sunscreen.
MedLine Citation:
PMID:  23097072     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
The toxicity of dietary exposure to artificially aged TiO(2) nanomaterial (T-Lite™) used in sunscreen cream was studied on Danio rerio. Embryolarval assays were conducted to assess the effects of TiO(2) residues of nanomaterial (RNM) on fish early life stages. Juvenile fishes were exposed by the trophic route in two experiments. During the first experiment, juvenile fishes were exposed to TiO(2) RNM for 14 days by adding RNM to commercial fish food. The second one consisted in producing a trophic food chain. Pseudokirchneriella subcapitata algae, previously contaminated with TiO(2) RNM in growth medium, was used to feed Daphnia magna neonates over a 48-h period. Daphnia were used next to feed juvenile fishes for 7 days. Accumulation of Ti, life traits (survival and growth) and biochemical parameters such as energy reserves, digestive (trypsin, esterase, cellulose and amylase) and antioxidant (superoxide dismutase and catalase) enzyme activity were measured at the end of exposures. As expected in the receiving aquatic system, TiO(2) RNM at low concentrations caused a low impact on juvenile zebrafish. A slight impact on the early life stage of zebrafish with premature hatching was observed, and this effect appeared mainly indirect, due to possible embryo hypoxia. When juvenile fish are exposed to contaminated food, digestive enzyme activity indicated a negative effect of TiO(2) RNM. Digestive physiology was altered after 14 days of exposure and seemed to be an indirect target of TiO(2) RNM when provided by food.
Authors:
Manuela Fouqueray; Patrice Noury; Lysiane Dherret; Perrine Chaurand; Khedidja Abbaci; Jerome Labille; Jerome Rose; Jeanne Garric
Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-10-25
Journal Detail:
Title:  Environmental science and pollution research international     Volume:  -     ISSN:  1614-7499     ISO Abbreviation:  Environ Sci Pollut Res Int     Publication Date:  2012 Oct 
Date Detail:
Created Date:  2012-10-25     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9441769     Medline TA:  Environ Sci Pollut Res Int     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Affiliation:
IRSTEA Lyon, UR MALY, 5 rue de la DOUA, 69626, Villeurbanne Cedex, France.
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