Copper-Containing Nanoparticles and Organic Complexes: Metal Reduction Triggers Rapid Cell Death via Oxidative Burst.

ABSTRACT: Copper-containing agents are promising antitumor pharmaceuticals due to the ability of the metal ion to react with biomolecules. In the current study, we demonstrate that inorganic Cu2+ in the form of oxide nanoparticles (NPs) or salts, as well as Cu ions in the context of organic complexes (oxidation states +1, +1.5 and +2), acquire significant cytotoxic potency (2-3 orders of magnitude determined by IC50 values) in combinations with N-acetylcysteine (NAC), cysteine, or ascorbate. In contrast, other divalent cations (Zn, Fe, Mo, and Co) evoked no cytotoxicity with these combinations. CuO NPs (0.1-1 µg/mL) together with 1 mM NAC triggered the formation of reactive oxygen species (ROS) within 2-6 h concomitantly with perturbation of the plasma membrane and caspase-independent cell death. Fu

SUBMITTER: Tsymbal SA 

PROVIDER: S-EPMC8539714 | biostudies-literature | 2021 Oct

REPOSITORIES: biostudies-literature