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Nanomaterials 2015, 5(3), 1331-1350;

Impact of Carbon Nano-Onions on Hydra vulgaris as a Model Organism for Nanoecotoxicology

Nano-Biomolecular Group, Istituto di Scienze Applicate e Sistemi Intelligenti "E.Caianiello", Consiglio Nazionale delle Ricerche, Via Campi Flegrei 34, 80078 Pozzuoli, Italy
Nano Carbon Materials Lab, Istituto Italiano di Tecnologia (IIT), Via Morego 30, 16163 Genova, Italy
Department of Chemistry, University of Texas at El Paso, El Paso, TX 79968, USA
Authors to whom correspondence should be addressed.
Academic Editor: Robert Tanguay
Received: 10 June 2015 / Revised: 5 August 2015 / Accepted: 6 August 2015 / Published: 13 August 2015
(This article belongs to the Special Issue Advancements in Nanotoxicology)
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The toxicological effects of pristine and chemically modified carbon nano-onions (CNOs) on the development of the freshwater polyp Hydra vulgaris were investigated in order to elucidate the ecotoxicological effects of CNOs. Chemical modifications of the CNOs were accomplished by surface functionalization with benzoic acid, pyridine and pyridinium moieties. thermogravimetric analysis (TGA), Fourier transform infrared spectroscopy (FT-IR) and Raman spectroscopy confirmed the covalent surface functionalization of CNOs. Hydra specimens were exposed to the carbon nanomaterials by prolonged incubation within their medium. Uptake was monitored by optical microscopy, and the toxicological effects of the CNOs on Hydra behavior, morphology, as well as the long-term effects on the development and reproductive capability were examined. The obtained data revealed the absence of adverse effects of CNOs (in the range 0.05–0.1 mg/L) in vivo at the whole animal level. Together with previously performed in vitro toxicological analyses, our findings indicate the biosafety of CNOs and the feasibility of employing them as materials for biomedical applications. View Full-Text
Keywords: nanotoxicology; aquatic organism; Hydra; ecotoxicology; carbon nanomaterials; fullerenes nanotoxicology; aquatic organism; Hydra; ecotoxicology; carbon nanomaterials; fullerenes

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Marchesano, V.; Ambrosone, A.; Bartelmess, J.; Strisciante, F.; Tino, A.; Echegoyen, L.; Tortiglione, C.; Giordani, S. Impact of Carbon Nano-Onions on Hydra vulgaris as a Model Organism for Nanoecotoxicology. Nanomaterials 2015, 5, 1331-1350.

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