Abstract
Inorganic nanoparticles are representing an emerging paradigm in molecular imaging probe design. We have determined lanthanum oxide nanoparticles (La2O3 NPs)-induced toxicity on human livers cells for 48 hrs. Before exposure to La2O3 NPs, the size and shape of NPs were confirmed by transmission electron microscope. It was found at 32 +/- 1.6 nm with a sheet-like morphological structure. The viability of CHANG and HuH-7 cells was reduced as the concentration of La2O3 NPs increased. HuH-7 cells were more sensitive than CHANG cells to La2O3 NPs. We observed production of intracellular ROS in HuH-7 cells was more than CHANG cells and the LPO level was more in CHANG cells than in HuH-7 cells at 50 mu g/ml of La2O3 NPs. Glutathione was decreased and catalase was increased at 50 mu g/ml of La2O3 NPs. More apoptotic and necrotic cells were observed at 300 mu g/ml in HuH-7 cells FACS. DNA damage was observed by the SGCE test and more DNA damage was found in CHANG cells than HuH-7 cells at 300 mu g/ml La2O3 NPs over 48 hrs. Thus, study warrants the application of La2O3 NPs in daily life and provides vital information about the toxicity of La2O3 NPs.