Physiological iron-trafficking system

The physiological iron-trafficking system is a highly regulated network of proteins and chemical pools responsible for the absorption, transport, storage, and utilization of iron, primarily in its ferric (Fe3+) state. Central to this system is the labile iron pool (LIP), a transient and chemically reactive fraction of intracellular iron that is available for metabolic processes but can also catalyze the production of harmful reactive oxygen species via Fenton chemistry (StatPearls, 2023). Systemic transport is mediated by transferrin, which maintains iron in a soluble, non-toxic form, while storage is managed by ferritin within cells (NIH, 2022). This system is a critical therapeutic target for conditions involving iron imbalance; for instance, iron chelators like deferoxamine are used to deplete the Fe3+ pool in iron overload disorders such as thalassemia and hemochromatosis (PubChem, 2024). Conversely, iron supplements are used to replenish the system in cases of iron-deficiency anemia. Emerging therapies also target regulatory components like hepcidin to manage iron distribution in chronic inflammatory diseases (Journal of Hepatology, 2021).

Other names

Fe3+ poolLabile iron poolLIPNon-transferrin bound ironNTBIIron homeostasis systemFerric iron pool

Drugs targeting this system work by either chelating excess ferric iron (Fe3+) to facilitate its excretion or by providing exogenous iron to replenish depleted stores and restore normal physiological function.