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Control of In Vivo Transport and Toxicity of Nanoparticles by Tea Melanin
Link to Journal Abstract
Nanoparticles are unfamiliar to researchers in toxicology. Toxicity may be generated simply due to the reduction in size. Compounds that prevent or cure toxic materials may not work on nanoparticles. Furthermore, as there are more and more applications of nanoparticles in drug delivery and in vivo imaging, controlling the transport and toxicity will be primary concerns for medical application of nanoparticles. Gold nanoparticles (GNPs) if injected intraperitoneally into mice can enter hippocampus and induce cognitive impairment. GNPs caused a global imbalance of monoamine levels, specifically affecting the dopaminergic and serotonergic neurons. Pretreatment of tea melanin significantly prevented the deposition of GNPs in mouse brains, especially in the hippocampus. Pretreatment of melanin completely alleviated GNP-induced impairment of cognition. Pre-administration of melanin stably maintained monoamines at normal profiles. Melanin completely prevented the invasion of GNPs into the Cornu Ammonis region of the hippocampus shown by coherent anti-Stoke Raman scattering microscopy. Here we show that the administration of tea melanin prevented the accumulation of Au in brain, the imbalance of monoamines, and the impairment of cognition in mice. The current study provides a therapeutic approach to toxicity of nanoparticles and a novel strategy to control the transport of GNP in mouse brain.
In this study, the accumulation of gold in the brain on exposure to gold nanoparticles (GNPs) is investigated, as well as effects associated with the imbalance of monoamines and the impairment of cognition in mice.
Peer Reviewed Journal Article
Exposure Or Hazard Target
Method Of Study
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Journal of Nanomaterials, 2012, Article ID 746969 (11 pp)
Journal of Nanomaterials
Chen YS, Hung YC, Hong MY, Onischuk AA, Chiou JC, Sorokina IV, Tolstikova T, Huang GS
Article ID 746960
Last updated on September 14, 2012
This work is supported in part by the Nanoscale Science and Engineering Initiative of the National Science Foundation
under NSF Award Number EEC-0118007.
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