Evaluation of the genome stability and mitochondrial potential of tumor cells in vivo under the action of nanoferromagnetics with different sizes of nanoparticles

The transmembrane potential and genome stability of tumor cells under nanoferromagnetic action with different sizes of nanoparticles were studied in vivo. An evaluation of the genotoxic influence of nanoeferromagnetics on tumor cells and changes in their mitochondrial potential was carried out with the application of a micronuclei test and mitochondrial fluorescent probe JC-1. Nanoferromagnetics with nanoparticle diameters of 40 and 100 nm at a concentration of 3 mg/kg were not found to deminish the trasmembrane mitochondrial potential and the genome of tumor cells and increase the micronucleus frequency of tumor cells to only a small extent. Iron nanoparticles at a concentration of 6 mg/kg were noted to demonstrate an antidromonous character of the changing mitochondrial potential and micronuclei frequency depending on their size. Iron nanoparticles with a smaller diameter were found to provoke an essential rise in the transmembrane potential of tumor cell metachondria on the background of a constant number of micronuclei, and the opposite was true for those with a greater diameter. The data obtained can serve as an important criterion for further studies in experimental oncology to create an optimal system for delivering anticancer preparations to tissue targets.