Iron metabolism machinery

The iron metabolism machinery is a complex, highly regulated system of proteins and signaling pathways responsible for maintaining iron homeostasis at both the systemic and cellular levels [2, 3, 10]. Key components include hepcidin, the master regulatory hormone; ferroportin, the sole cellular iron exporter; and transferrin, which transports iron in the plasma [2, 10, 15]. This machinery ensures that sufficient iron is available for vital processes such as oxygen transport in hemoglobin, DNA synthesis, and mitochondrial respiration, while preventing the accumulation of toxic free iron that can catalyze the formation of reactive oxygen species via the Fenton reaction [6, 8, 13]. Dysregulation of this system is central to numerous pathologies, including iron-deficiency anemia, hereditary hemochromatosis, and anemia of chronic disease [5, 7, 14]. In cancer, the machinery is often hijacked to support rapid cell proliferation, making it a target for therapeutic intervention [1, 11, 12]. Pharmacological strategies include the use of iron chelators to treat overload, hepcidin mimetics to manage iron-restricted anemias, and HIF-prolyl hydroxylase inhibitors to stimulate erythropoiesis by modulating iron availability [2, 16, 19].

Other names

Iron homeostasis systemIron regulatory machineryHepcidin-ferroportin axisCellular iron metabolism pathway

Drugs targeting the iron metabolism machinery act through several mechanisms: iron chelation to remove excess metal, hepcidin agonism or ferroportin inhibition to restrict iron export, and HIF-prolyl hydroxylase inhibition to stabilize HIF-2α and enhance iron absorption and erythropoiesis [2, 3, 16].