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Inhaled Fluorescent Magnetic Nanoparticles Induced Extramedullary Hematopoiesis in the Spleen of Mice

Cited 24 time in Web of Science Cited 33 time in Scopus
Authors

Kwon, Jung-Taek; Kim, Dae-Seong; Minai-Tehrani, Arash; Hwang, Soon-Kyung; Chang, Seuno-Hee; Lee, Eun-Sun; Xu, Cheng-Xiong; Lim, Hwang Tae; Kim, Ji-Eun; Yoon, Byung-Il; An, Gil-Hwan; Lee, Kee-Ho; Lee, Jin-Kyu; Cho, Myung-Haing

Issue Date
2009-09
Publisher
Japan Society for Occupational Health/Nihon Sangyo Eisei Gakkai
Citation
Journal of Occupational Health, Vol.51 No.5, pp.423-431
Abstract
Inhaled Fluorescent Magnetic Nanoparticles Induced Extramedullary Hematopoiesis in the Spleen of Mice: Jung-Taek KWON, et al. Laboratory of Toxicology, College of Veterinary Medicine, Seoul National University, Korea-Objectives: Nanomaterials are used in a wide variety of industrial materials such as semiconductors, magnetic resonance imaging, gene delivery carriers for gene therapy and many others; thus, human seems to be frequently exposed to them. Such diverse applications of nanoparticles elicit the need to identify the positive aspects of nanomaterials while avoiding the potential toxic effects. In this study, inhalation toxicity of manufactured nanomaterials using fluorescent magnetic nanoparticles (FMNPs) was assessed to address the issue of potential nanoparticle toxicity. Methods: Biological samples from a previous mouse FMNP exposure experiment were analyzed for potential FMNP toxicity. Mice inhaled FMNPs for 4 wk through a nose-only exposure chamber developed by our group for 4 wk and the potential toxicity of FMNPs was analyzed. Results: The nanoparticle distribution by scanning mobility particle sizer (SMPS) analysis showed that the mean values of number concentration (mass concentrations) in the nose-only exposure chamber were maintained at 4.89x10(5)/cm(3) (approximately 159.4 mu g/m(3)) for the low concentration and 9.34x10(5)/cm(3) (approximately 319.5 mu g/m(3)) for the high concentration, respectively. Inhalation of FMNPs caused a decrease of body weight and significant changes of white blood cells (WBCs) levels in whole blood. The FMNPs induced extramedullary hematopoiesis in the spleen without having a pulmonary effect. Conclusions: Our results support the proposition that extensive toxicity evaluation is needed for practical applications of anthropogenic nanomaterials and suggest that careful regulation of nanoparticle applications may be necessary to maintain a high quality of life as well as for facilitating the development of nanotechnology. (J Occup Health 2009; 51: 423-431)
ISSN
1341-9145
URI
https://hdl.handle.net/10371/172442
DOI
https://doi.org/10.1539/joh.L8159
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  • College of Veterinary Medicine
  • Department of Veterinary Medicine
Research Area Nanotoxicology, Veterinary Toxicology

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