most challenging issues for successful application of gene therapy. A particular focus has
been on understanding structure-activity relationships for transfection activity and toxicity of
polyethylenimine (PEI). During the last decade, the use of cerium oxide nanoparticles (CeO
2-NPs) in biomedicine has attracted much attention due to their pH-dependent antioxidant
activity. CeO 2-NPs provide protection normal cells from various forms of reactive oxygen …