Copper ion chelation

Copper ion chelation refers to the process of selectively binding and removing copper ions, most commonly the oxidized Cu2+ (cupric ion), from biological systems using chelating agents. Copper is an essential trace element involved as a cofactor in various enzymes and in cellular processes including cytochrome c oxidase function, antioxidant defense (via superoxide dismutase), and regulation of growth factor pathways[4][5][8]. However, excess copper is toxic and can catalyze harmful oxidative reactions, disrupt protein structure through mis-metallation, and promote aggregation of proteins such as amyloid-β in neurodegenerative diseases[4][5]. Chelation therapy is used to restore copper homeostasis in diseases such as Wilson disease (characterized by copper overload) and is under investigation in oncology for its role in inhibiting copper-dependent angiogenesis and tumor proliferation[6][8]. Several drugs, including tetrathiomolybdate and D-penicillamine, are approved or in clinical use for copper chelation, and novel, more selective chelators are being developed to minimize off-target effects and avoid depletion of copper required for physiological functions[1][2][5]. Chelating agents vary in specificity, with a goal of achieving high affinity for pathogenic (redox-active, loosely bound) copper pools without disturbing essential biological copper[1][2]. Safety concerns include the potential for copper deficiency, impacts on other metals, and organ toxicity. Caveat: Copper ion chelation is not itself a discrete molecular entity, receptor, or protein but rather a *therapeutic mechanism* or process. Therefore, the “target” refers to a chemical species (Cu2+ ion) and its pathological pool. It cannot be strictly classified alongside proteins, enzymes, or receptors, and the precise biological effects depend on the specificity of the chelator and disease context[1][2][3][5][8].

Other names

Copper chelationCopper(II) chelationCu2+ chelationMetal ion chelation

Chelation and sequestration of free or loosely bound copper(II) ions (Cu2+); Prevention of copper-induced oxidative damage; Inhibition of copper-dependent angiogenesis; Modulation of copper-dependent enzyme and protein activity