Systemic copper homeostasis

Systemic copper homeostasis is the physiological regulation of copper levels within the body, ensuring sufficient availability for cuproenzymes while preventing toxic accumulation (Lutsenko, 2010, PubMed). Copper is a vital cofactor for enzymes like cytochrome c oxidase and superoxide dismutase, but free copper can generate damaging reactive oxygen species via Fenton-type reactions (Banci et al., 2010, PubMed). This balance is maintained by a network of proteins, including the uptake transporter CTR1, the efflux transporters ATP7A and ATP7B, and the storage protein metallothionein (Kim et al., 2008, PubMed). Clinical disorders arise when this system fails: Wilson disease involves toxic copper buildup in the liver and brain due to ATP7B mutations, while Menkes disease is characterized by systemic copper deficiency due to ATP7A mutations (StatPearls, 2023). Therapeutic strategies focus on restoring balance using chelators like penicillamine to remove excess copper, zinc salts to inhibit intestinal absorption, or copper supplements for deficiency (NIH, 2022). Because this entry describes a complex physiological process involving multiple proteins rather than a single molecular entity, it is classified as a system-level target (PubMed, 2010).

Other names

Copper metabolismCopper regulationCopper traffickingCopper balance

Modulation of copper levels via chelation of excess ions, induction of intestinal metallothionein to block absorption, or direct copper supplementation (StatPearls, 2023).