title: In vivo biomodification of lipid-coated carbon nanotubes by Daphnia magna.
abstract: This study examined the interactions between Daphnia magna and a water-soluble, lysophophatidylcholine coated single-walled carbon nanotube. D. magna were able to ingest the nanotubes through normal feeding behavior and utilize the lysophophatidylcholine coating as a food source. D. magna were able to modify the solubility of the nanotube, likely through digestion of the lipid coating. This study provides evidence of biomodification of a carbon-based nanomaterial by an aquatic organism. The modification significantly altered the physical properties of the nanomaterial in freshwater. Acute toxicity was observed only in the highest test concentrations. These are important findings related to determining the behavior and potential toxicity of coated nanomaterials released into the environment.
authors.affiliation: Department of Biological Sciences, University of North Texas, Denton, Texas 76203, USA.
authors.forename: Aaron P
authors.initials: AP
authors.lastname: Roberts
authors.forename: Andrew S
authors.initials: AS
authors.lastname: Mount
authors.forename: Brandon
authors.initials: B
authors.lastname: Seda
authors.forename: Justin
authors.initials: J
authors.lastname: Souther
authors.forename: Rui
authors.initials: R
authors.lastname: Qiao
authors.forename: Sijie
authors.initials: S
authors.lastname: Lin
authors.forename: Pu Chun
authors.initials: PC
authors.lastname: Ke
authors.forename: Apparao M
authors.initials: AM
authors.lastname: Rao
authors.forename: Stephen J
authors.initials: SJ
authors.lastname: Klaine
mesh_terms: D000818:Animals; D003621:Daphnia / Q000187:drug effects / Q000378:metabolism*; D004784:Environmental Monitoring; D056890:Eukaryota; D005247:Feeding Behavior / Q000502:physiology; D008055:Lipids / Q000737:chemistry*; D008244:Lysophosphatidylcholines / Q000378:metabolism; D037742:Nanotubes, Carbon / Q000737:chemistry* / Q000633:toxicity; D012995:Solubility; D014874:Water Pollutants, Chemical / Q000737:chemistry / Q000633:toxicity
chemical_list: D008055:Lipids; D008244:Lysophosphatidylcholines; D037742:Nanotubes, Carbon; D014874:Water Pollutants, Chemical