Iron Metabolism and Disorders
Research Guide

Hepcidin, a liver-secreted peptide hormone, responds to iron loading and inflammation by binding to ferroportin, the cellular iron exporter, and inducing its internalization. Decreased hepcidin causes tissue iron overload, while excess hepcidin results in hypoferremia and anemia of inflammation. This mechanism maintains iron homeostasis ("Hepcidin Regulates Cellular Iron Efflux by Binding to Ferroportin and Inducing Its Internalization" (2004) by Nemeth et al.).

Anemia of chronic disease stems from disturbances in iron homeostasis, impaired erythroid progenitor proliferation, and reduced erythropoietin response. Inflammation elevates hepcidin, sequestering iron and limiting availability for erythropoiesis. Therapeutic advances target these pathways ("Anemia of Chronic Disease" (2005) by Weiß and Goodnough).

A novel MHC class I-like gene is mutated in patients with hereditary hemochromatosis, leading to iron overload. Identification of this gene enables genetic testing and management. The mutation disrupts iron regulation ("A novel MHC class I–like gene is mutated in patients with hereditary haemochromatosis" (1996) by Feder et al.).

Anaemia prevalence data from the WHO Vitamin and Mineral Nutrition Information System for 1993–2005 provide global and regional estimates, highlighting numbers affected in total populations and subgroups. These figures underscore iron deficiency as a major contributor. Estimates guide public health interventions ("Worldwide prevalence of anaemia, WHO Vitamin and Mineral Nutrition Information System, 1993–2005" (2008) by McLean et al.).

The FRAP assay measures antioxidant power by assessing the ferric reducing ability of plasma. It quantifies the capacity to reduce ferric ions under standard conditions. This method evaluates oxidative stress in iron-related disorders ("The Ferric Reducing Ability of Plasma (FRAP) as a Measure of “Antioxidant Power”: The FRAP Assay" (1996) by Benzie and Strain).

Ferroportin exports iron from cells, regulated by hepcidin. Proton-coupled metal-ion transporters facilitate iron uptake. These proteins maintain iron balance ("Hepcidin Regulates Cellular Iron Efflux by Binding to Ferroportin and Inducing Its Internalization" (2004) by Nemeth et al.; "Cloning and characterization of a mammalian proton-coupled metal-ion transporter" (1997) by Gunshin et al.).