Journal
INTERNATIONAL JOURNAL OF NANOMEDICINE
Volume 7, Issue -, Pages 4809-4818Publisher
DOVE MEDICAL PRESS LTD
DOI: 10.2147/IJN.S34349
Keywords
Fe3O4-nanoparticles; reactive oxygen species; glutathione; malondialdehyde; DNA-protein crosslinks; 8-hydroxy-2 '-deoxyguanosine
Funding
- Chinese National Program for High Technology Research and Development (863 Program) [2006AA03Z330]
- Chinese National Program for Fundamental Research and Development (973 Program) [2010CB933904]
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Because of its unique magnetic properties, the iron oxide (Fe3O4) nanoparticle has been widely exploited and its application in various fields has promised immense benefits. However, doubts exist over the use of Fe3O4-nanoparticles in human beings. Thus, the aim of the current study was to find out the potential safety range of medical use. Twenty-five Kunming mice were exposed to Fe3O4-nanoparticles via intraperitoneal injection daily for 1 week at doses of 0, 5, 10, 20, and 40 mg/kg. Hepatic and renal tissues were sliced for physiological observation. Injuries were observed in the high-dose groups (20 and 40 mg/kg) compared with the control group (0 mg/kg). Biomarkers of reactive oxygen species, glutathione, malondialdehyde, DNA-protein crosslinks, and 8-hydroxy-2'-deoxyguanosine in the hepatic and renal tissues were detected. Injury to tissues and oxidative damage to cells at the molecular level was found. The safest dose recommended from the results of this study is 5 mg/kg, as we believe this to be an upper limit balancing the benefits and risks for sub-long-term exposure.
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