ID 111245
Author
Fujihara, Junko Shimane University
Tongu, Miki Shin-yamanote Hospital
Hashimoto, Hideki Shimane University
Yamada, Takaya Shimane University
Kimura-Kataoka, Kaori Shimane University
Yasuda, Toshihiro University of Fukui
Fujita, Yasuhisa Shimane University
Takeshita, Haruo Shimane University
Keywords
Nanoparticles
Intravenous injection
ZnO
Acute toxicity
Tissue distribution
Content Type
Journal Article
Description
ZnO nanoparticles (NPs) have been widely used in various commercial products. Application of ZnO NPs is expected to apply to cancer diagnosis and therapy, used as drug delivery carriers. In the present study, the lethal dose 50 (LD50) of intravenously administered ZnO NPs (0.3 mg/kg) was calculated in mice. Blood kinetics and tissue distribution of a toxic dose of ZnO NPs (0.2 mg/kg, 0.05 mg/kg) were investigated after intravenous exposure. In addition, 8-hydroxy-2’-deoxyguanosine (8-OHdG) was evaluated. Following the injection, ZnO NPs were rapidly removed from the blood and distributed to organs. Pulmonary emphysema was observed pathologically study in mice at 3 days after the 0.2 mg/kg dose and at 6 days after the 0.05 mg/kg dose. ZnO NPs were mainly accumulated in the lung and spleen within 60 min. From the long-term tissue distribution study, the liver showed peak concentration at 6 days, and spleen peaked at 1 day. The lungs kept high levels until 6 days. Tissue distribution and pathological study showed that the spleen, liver, and lungs are target organs for ZnO NPs. Accumulation in the liver and spleen may be due to the phagocytosis by macrophages. A dose-dependent increase in 8-OHdG was observed in mice treated with ZnO NPs. This study is the first to show information on kinetics and target organs following intravenous ZnO injection.
Journal Title
The Journal of Medical Investigation
ISSN
13496867
13431420
NCID
AA11166929
AA12022913
Publisher
Faculty of Medicine Tokushima University
Volume
62
Issue
1-2
Start Page
45
End Page
50
Sort Key
45
Published Date
2015-02
DOI (Published Version)
URL ( Publisher's Version )
FullText File
language
eng
TextVersion
Publisher