期刊
TOXICOLOGY AND INDUSTRIAL HEALTH
卷 29, 期 10, 页码 897-903出版社
SAGE PUBLICATIONS INC
DOI: 10.1177/0748233712446723
关键词
PBS; oxidative stress; MgO; catalase; superoxide dismutase; total antioxidant capacity
资金
- M Pharmacy Fellowship, AICTE, New Delhi, India
In this present study, antioxidant status was evaluated in rat serum following exposure to magnesium oxide (MgO) nanoparticles. The lungs of rats were intratracheally instilled with (single dose) phosphate-buffered saline (PBS)+1% of Tween 80 (solvent control) or MgO or carbonyl iron (negative control) or quartz particles (positive control) at a dose of 1 and 5mg/kg of body weight. The blood samples were collected at 1, 7, and 30days of postinstillation of nanoparticles after their exposure, and different parameters were estimated to assess the oxidative stress induced by the instillation of MgO. Exposure of rats to MgO produced a significant (p<0.05) dose-dependent reduction in blood total antioxidant capacity, superoxide dismutase, and catalase activity levels than PBS+1% Tween 80 control group. This reduction in the antioxidant capacity in MgO nanoparticle-exposed rats indicates the reduction in antioxidant defense mechanisms due to the instillation of MgO. These results indicate that exposure to MgO nanoparticles induces oxidative stress by reducing the total antioxidant capacity in rats. The findings suggest possible occupational health hazard in chronic exposures.
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