期刊
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
卷 10, 期 12, 页码 8544-8549出版社
AMER SCIENTIFIC PUBLISHERS
DOI: 10.1166/jnn.2010.2690
关键词
Titanium Dioxide; Intratracheal Instillation; Systematic Influence
This work reported the systematic influence of titanium dioxide nanoparticles (TiO2 NPs) with a diameter of 3 nm on mice. Mice were repeated intratracheally instilled with TiO2 NPs, once per-week for 4 consecutive weeks, at total dose of 13.2 mg/kg. At 28 days post-instillation, the biochemical parameters in broncboalveolar lavage fluid (BALF) and brain homogenate as well as histopathologic changes of tissues were examined to describe the subacute toxicity of instilled TiO2 NPs. The results showed that instilled TiO2 NPs could induce lung damage, and change the permeability of alveolar-capillary barrier. The TiO2 NPs were able to get access to blood circulation and reach extrapulmonary tissues, then lead to injury at the different level, such as liver and kidney. Our results also indicated that TiO2 NPs might pass through the blood brain barrier (BBB), and induce the brain injury through oxidative stress response.
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