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Environmental problems - Chemical approaches
RESEARCH FRONT

Assessment of cultured fish hepatocytes for studying cellular uptake and (eco)toxicity of nanoparticles

Tessa M. Scown A F , Rhys M. Goodhead A F , Blair D. Johnston A , Julian Moger B , Mohammed Baalousha C , Jamie R. Lead C , Ronny van Aerle A , Taisen Iguchi D and Charles R. Tyler A E
+ Author Affiliations
- Author Affiliations

A Ecotoxicology and Aquatic Biology Research Group, Hatherly Laboratories, University of Exeter, Prince of Wales Road, Exeter, EX4 4PS, UK.

B Biomedical Physics Group, School of Physics, University of Exeter, Stocker Road, Exeter, EX4 4QL, UK.

C School of Geography, Earth, and Environmental Sciences, University of Birmingham, Edgbaston, Birmingham, B15 2TT, UK.

D Okazaki Institute for Integrative Bioscience, National Institute for Basic Biology, 5-1 Higashiyama, Myodaiji, Okazaki, Aichi 444-8787, Japan.

E Corresponding author. Email: c.r.tyler@exeter.ac.uk

F Co-first authors. Email: t.m.scown@exeter.ac.uk; r.m.goodhead@exeter.ac.uk

Environmental Chemistry 7(1) 36-49 https://doi.org/10.1071/EN09125
Submitted: 2 October 2009  Accepted: 22 December 2009   Published: 22 February 2010

Environmental context. The production and application of engineered nanoparticles is rapidly increasing, and development of suitable models for screening nanoparticles for possible toxic effects is essential to protect aquatic organisms and support the sustainable development of the nanotechnology industry. Here, the suitability of isolated rainbow trout hepatocytes was assessed for high through-put toxicity screening of nanoparticles and for studying uptake of nanoparticles into cells.

Abstract. Relatively little is known regarding the fate and possible toxic effects of engineered nanoparticles (ENPs) in the aquatic environment. We assessed the suitability of isolated trout hepatocytes for high throughput toxicity screening of ENPs, exposing them to a variety of metal and metal oxide nanoparticles and their bulk counterparts. We found no effects of the ENPs on cell viability, or on lipid peroxidation, with the exception of exposure to ZnO nanoparticles, or on glutathione-S-transferase (GST) levels, for exposure concentrations up to 500 μg mL–1. All ENPs, however, were internalised in the cultured hepatocytes, as shown by coherent anti-Stokes Raman scattering (CARS) as an imaging technique. Our findings suggest that fish hepatocyte cultures are suitable for studies investigating the cellular uptake of ENPs, but they do not appear to be sensitive to ENP exposure and thus not a good in vitro model for nanoparticle toxicity screening.

Additional keywords: coherent anti-Stokes Raman scattering, in vitro, metal oxides, rainbow trout, silver.


Acknowledgements

This work was supported by the Natural Environment Research Council [NER/S/A/2005/13319 NE/D004942/1, NE/C002369/1 and the UK Environment Agency to C.R.T. and R.v.A.]. The NERC Facility FENAC (Birmingham, UK) is acknowledged for help with nanoparticle characterisation. We thank Chris Pook for help with the GST assay, Dr Anke Lange and Dr Lisa Bickley for help with the hepatocyte isolations. All investigations were performed in accordance with the Animals (Scientific Procedures) Act, 1986 (UK).


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