Journal
ENVIRONMENTAL TOXICOLOGY AND PHARMACOLOGY
Volume 36, Issue 1, Pages 66-72Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.etap.2013.03.006
Keywords
Nanosized titanium dioxide (nano-TiO2); Toxicity; A549 cell; Mitochondria
Funding
- National Key Technology RD Program [31-1122ZCKF]
- Quality Public Welfare Industry Research [201210284-2]
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The nanosized titanium dioxide (nano-TiO2) is an important nanoscale compound applied in many different fields because of its superior performance. Here, an anatase nano-TiO2 showed cytotoxicity in a dosage-dependent manner, which was in accordance with changes of A549 cell ultrastructure, A549 cell viability and intracellular ATP level. The lungs of rats treated with single intratracheal instillation of nano-TiO2 were injured, which was demonstrated by changes of alveolar epithelial cell ultrastructure, lung tissue pathology and lung tissue MDA level. The results of this study indicated that nano-TiO2 should be related to the generation of intracellular reactive oxygen species (ROS), which injured mitochondria and prevented the synthesis of ATP. The cells were approaching to apoptosis eventually. In macroscopic view, the lungs inevitably suffered. (C) 2013 Elsevier B.V. All rights reserved.
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