Systemic iron-handling proteins and stores

Systemic iron-handling proteins and stores encompass the complex network of proteins and physiological reservoirs that regulate iron absorption, transport, and storage [StatPearls]. Central to this system is hepcidin, a liver-derived hormone that controls iron entry into the plasma by binding to and inducing the degradation of ferroportin, the only known cellular iron exporter [UniProt]. Other critical components include transferrin, which safely transports iron through the bloodstream, and ferritin, which stores iron in a non-toxic form within cells [NIH]. This system is vital for maintaining sufficient iron levels for hemoglobin synthesis and enzymatic functions while preventing the toxicity associated with free iron [JCI]. Clinical disorders arise when this balance is disrupted, leading to conditions such as iron-deficiency anemia or hereditary hemochromatosis [PubMed]. Therapeutic strategies involve direct iron replacement, the use of chelating agents like deferoxamine to treat overload, and emerging hepcidin mimetics for managing iron distribution [DrugBank]. Monitoring this system typically involves measuring serum ferritin and transferrin saturation to assess total body iron status [StatPearls].

Other names

Iron metabolism systemSystemic iron homeostasisIron stores

Drugs targeting this system work through several mechanisms: direct iron supplementation (e.g., oral or intravenous iron) to replenish depleted stores; iron chelation (e.g., deferoxamine) to bind and remove excess iron from the body; and modulation of the hepcidin-ferroportin axis (e.g., hepcidin mimetics) to regulate iron release into the circulation [StatPearls, DrugBank].