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Title: A pilot study in non-human primates shows no adverse response to intravenous injection of quantum dots
Authors: Ye, Ling
Yong, Ken-Tye
Liu, Liwei
Roy, Indrajit
Hu, Rui
Zhu, Jing
Cai, Hongxing
Law, Wing-Cheung
Liu, Jianwei
Wang, Kai
Liu, Jing
Liu, Yaqian
Hu, Yazhuo
Zhang, Xihe
Swihart, Mark T.
Prasad, Paras N.
Keywords: DRNTU::Engineering::Electrical and electronic engineering
Issue Date: 2012
Source: Ye, L., Yong, K.-T., Liu, L., Roy, I., Hu, R., Zhu, J., et al. (2012). A pilot study in non-human primates shows no adverse response to intravenous injection of quantum dots. Nature Nanotechnology, 7(7), 453-458.
Series/Report no.: Nature nanotechnology
Abstract: Quantum dots have been used in biomedical research for imaging1, 2, diagnostics3, 4 and sensing purposes5, 6. However, concerns over the cytotoxicity of their heavy metal constituents7, 8 and conflicting results from in vitro7, 9 and small animal10, 11, 12, 13, 14 toxicity studies have limited their translation towards clinical applications. Here, we show in a pilot study that rhesus macaques injected with phospholipid micelle-encapsulated CdSe/CdS/ZnS quantum dots do not exhibit evidence of toxicity. Blood and biochemical markers remained within normal ranges following treatment, and histology of major organs after 90 days showed no abnormalities. Our results show that acute toxicity of these quantum dots in vivo can be minimal. However, chemical analysis revealed that most of the initial dose of cadmium remained in the liver, spleen and kidneys after 90 days. This means that the breakdown and clearance of quantum dots is quite slow, suggesting that longer-term studies will be required to determine the ultimate fate of these heavy metals and the impact of their persistence in primates.
ISSN: 1748-3387
DOI: 10.1038/nnano.2012.74
Rights: © 2012 Macmillan Publishers Limited.
Fulltext Permission: none
Fulltext Availability: No Fulltext
Appears in Collections:EEE Journal Articles


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