Physiological iron-binding protein pool

The physiological iron-binding protein pool refers to the ensemble of proteins that sequester, transport, and utilize iron to maintain systemic iron homeostasis and prevent oxidative damage [1][2]. This pool includes transport proteins like transferrin, storage proteins such as ferritin and hemosiderin, and functional proteins like hemoglobin, myoglobin, and various cytochromes [2][3]. Because free iron is chemically reactive and can catalyze the formation of harmful free radicals via Fenton chemistry, these proteins are essential for safely managing iron levels throughout the body [1]. In therapeutic contexts, this pool is targeted by iron chelators, such as deferoxamine and deferasirox, to treat iron overload disorders like hereditary hemochromatosis or secondary iron overload from frequent blood transfusions [4]. These drugs work by competing for iron bound within the pool, forming stable complexes that are subsequently excreted [4]. Conversely, iron replacement therapies target this pool to treat iron deficiency anemia by providing the necessary substrate for hemoglobin synthesis and replenishing depleted storage sites [3]. Monitoring this pool is clinically vital, using biomarkers like serum ferritin and transferrin saturation to guide treatment for both deficiency and overload states [2][3].

Other names

Iron-binding proteinsIron transport and storage proteinsSiderophilinsMetalloprotein pool

Iron chelators bind to ferric iron within the protein pool to form stable, excretable complexes, while iron supplements provide elemental iron to saturate these proteins for hemoglobin synthesis and storage.