Functionalized Fullerene Increases NF-κB Activity and Blocks Genotoxic Effect of Oxidative Stress in Serum- Starving Human Embryo Lung Diploid Fibroblasts

The influence of a water-soluble [60] fullerene derivative containing five residues of 3-phenylpropionic acid and a chlorine addend appended to the carbon cage (F-828) on serum-starving human embryo lung diploid fibroblasts (HELFs) was studied. Serum deprivation evokes oxidative stress in HELFs. Cultivation of serum-starving HELFs in the presence of 0.1-1 mu MF-828 significantly decreases the level of free radicals, inhibits autophagy, and represses expression of NOX4 and NRF2 proteins. The activity of NF-kappa B substantially grows up in contrast to the suppressedNRF2 activity. In the presence of 0.2-0.25 mu M F-828, the DSB rate and apoptosis level dramatically decrease. The maximum increase of proliferative activity of the HELFs and maximum activity of NF-kappa B are observed at these concentration values. Conclusion. Under the conditions of oxidative stress evoked by serum deprivation the water-soluble fullerene derivative F-828 used in concentrations of 0.1 to 1 mu M strongly stimulates the NF-kappa B activity and represses the NRF2 activity in HELFs.