Personalized and Precision Medicine Journal

Abstract Because of their small size, unique physics, and chemical properties, metal nanoparticles can easily cross obstacles and reach their target cells, which makes them an ideal choice for therapeutic purposes in various cancers. In this study, the effects of iron oxide nanoparticles on MDA-MB-231 breast cancer cell line were examined, and biomarkers related to oxidative stress were evaluated. Fe2O3 nanoparticles were suspended in a cell culture medium and diluted to appropriate concentrations (0, 10, 30, 60, and 120 μg/ml) for 24 and 48 h. GSH, superoxide dismutase, catalase, and ROS generation were evaluated. The results showed that iron oxide nanoparticles induced intracellular ROS generation in a dose- and time-dependent manner. The results further showed that iron oxide nanoparticles increased ROS and activated oxidative stress in cells.

Abstract According to the World Health Organization, one in eight to ten women will develop breast cancer. Therefore, the development of new blood / serum markers is important as an alternative to traditional diagnosis methods. Early detection of breast cancer plays an important role in choosing the right treatment approach and treating the patient. In this study, the expression of miRNA21 gene in the plasma sample of people with breast cancer compared to healthy people was evaluated. The results of qPCR showed that the expression levels of miRNA-21 in the plasma samples of breast cancer patients were significantly increased compared to those of the healthy controls. These results suggest that Mir 21 could be a very good blood biomarker for the early detection of breast cancer.