Copper (ion) (Cu)

Copper is an essential trace element that serves as a critical cofactor for numerous enzymes involved in cellular respiration, antioxidant defense, and iron metabolism (NIH, 2024). Under normal physiological conditions, copper levels are tightly regulated by transporters such as ATP7B, which facilitates its excretion into the bile (UniProt, 2024). 'Copper overload' or 'copper-induced pathology' occurs when these homeostatic mechanisms fail, leading to the toxic accumulation of copper ions in tissues, particularly the liver and brain (PubMed, 2023). This accumulation triggers the production of reactive oxygen species, resulting in oxidative stress, lipid peroxidation, and mitochondrial damage (NIH, 2024). Clinically, this is most prominent in Wilson disease, an autosomal recessive disorder characterized by hepatic cirrhosis and neuropsychiatric symptoms (StatPearls, 2024). Therapeutic intervention primarily targets the copper ion itself through the use of chelating agents like D-penicillamine and trientine, which sequester the metal for renal excretion (PubChem, 2024). Additionally, zinc salts are used to induce metallothionein in the gut, which traps dietary copper and prevents its absorption (NIH, 2024). Effective management of copper levels is essential to halt disease progression and mitigate the severe organ damage associated with chronic copper toxicity.

Other names

Cu2+Cu+Cupric ionCuprous ionCopper cationCopper toxicityCopper overloadCopper-induced pathology

Chelation and sequestration of copper ions to facilitate renal excretion; induction of intestinal metallothionein to block absorption.