Iron Metabolism Overview

Principles

Definition

Iron metabolism is the academic field dedicated to investigating the complex biological processes that regulate the acquisition, distribution, storage, and utilization of iron in living systems. This research is fundamental to understanding cellular function and systemic homeostasis, with critical implications for numerous health conditions stemming from iron dyshomeostasis.

Ontological type

Molecular mechanisms

Systemic regulation

Pathophysiology

Key developments

Key Figures

Nutritional and Analytical Foundations era

R. A. McCance [1] was a central figure in the Nutritional and Analytical Foundations of iron metabolism during this era, with affiliations at Karolinska Institutet [2] and the University of Cambridge [3]. His 1937 work ABSORPTION AND EXCRETION OF IRON [4] provided early quantitative insights into iron balance, showing how digestive milieu and iron absorption shape availability for hematopoiesis and establishing a foundation for nutritional iron research. McCance [1] continued to advance methods that converted iron measurement into a standardized, clinically actionable science. Across the era, his research anchored by Karolinska Institutet [2] and the University of Cambridge [3] established the nutritional and analytical foundations for iron balance, enabling later mechanistic inquiry [4].

Molecular Regulatory Network era

Tomas Ganz [1] was a central figure in the Molecular Regulatory Network era, with affiliations at University of California, San Francisco [3] and Stanford University [4]. His key contribution in this era is the 2004 Hepcidin Regulates Cellular Iron Efflux by Binding to Ferroportin and Inducing Its Internalization [7], which clarified how hepcidin binding triggers ferroportin internalization, thereby regulating cellular iron efflux and linking cellular sensing to systemic iron homeostasis. Jerry Kaplan [2] worked across Johns Hopkins University [5] and Washington University in St. Louis [6] during this era. As a co-author of the 2004 Hepcidin Regulates Cellular Iron Efflux by Binding to Ferroportin and Inducing Its Internalization [7], Kaplan [2] helped establish the hepcidin–ferroportin regulatory axis, a foundational component of the era's molecular network for iron homeostasis.

Multiscale Pathophysiology era

Elizabeta Nemeth [1] has been active at Harvard University [3] and the University of Pennsylvania [4] during this era. Her key contribution in this era includes identifying erythroferrone as an erythroid regulator of iron metabolism [6], a finding that clarified how erythropoiesis communicates with systemic iron homeostasis and helped position ferritinophagy and hepcidin gating within multiscale pathophysiology. Stefano Rivella [2] is associated with the University of Pennsylvania [4] and Cornell University [5] in this era. His work centers on the same erythroid regulator erythroferrone, as reflected in the 2014 paper Identification of erythroferrone as an erythroid regulator of iron metabolism [6], a discovery that linked erythropoietic signaling to organ iron handling and helped catalyze translational approaches targeting iron‑dependent pathology across cancer, neurodegeneration, and organ injury.