Toxicological Alterations Induced by Subacute Exposure of Cobalt Oxide Nanoparticles in Aged Rats: Behavioral, Biochemical, Molecular, and Histopathological Evidence.

Currently, evidence has pointed out that metal-based nanomaterials may have potentially harmful outcomes in the development of such diseases related to neurodegenerative disorders, oxidative stress, and inflammation. Among them, cobalt oxide nanoparticles (Co3O4-NPs), nano metal-oxides, are widely used in several areas such as industries and as wastewater treatment. Although Co3O4-NPs have a large scale in biological and industrial applications, there is a growing concern to their toxic effect on human health and the environment due to their reduced size and high reactivity, both chemically and biologically.