Ferroportin

Cell biology

Biology

Hemochromatosis

Metabolism

Neurodegeneration

Heme

Biochemistry

Ferritin

Immunology

Intracellular

Genetics

Oxidative phosphorylation

Oxidative stress

Inflammation

Enzyme

Medicine

Chemistry

Organism

Disease

Hepcidin

Pathology

Maintenance of proper "labile iron" levels is a critical component in preserving homeostasis. Iron is a vital element that is a constituent of a number of important macromolecules, including those involved in energy production, respiration, DNA synthesis, and metabolism; however, excess "labile iron" is potentially detrimental to the cell or organism or both because of its propensity to participate in oxidation-reduction reactions that generate harmful free radicals. Because of this dual nature, elaborate systems tightly control the concentration of available iron. Perturbation of normal physiologic iron concentrations may be both a cause and a consequence of cellular damage and disease states. This review highlights the molecular mechanisms responsible for regulation of iron absorption, transport, and storage through the roles of key regulatory proteins, including ferroportin, hepcidin, ferritin, and frataxin. In addition, we present an overview of the relation between iron regulation and oxidative stress and we discuss the role of functional iron overload in the pathogenesis of hemochromatosis, neurodegeneration, and inflammation.

Intracellular Iron Transport and Storage: From Molecular Mechanisms to Health Implications