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Background: In ineffective erythropoiesis, hepcidin synthesis is suppressed by erythroid regulators, namely erythroferrone and growth differentiation factor-15. For the first time, the hypothesis that iron overload in megaloblastic anemia may be related to ineffective erythropoiesis is explored by describing the kinetics of hepcidin, erythroferrone, and growth differentiation factor-15 levels in a patient diagnosed with megaloblastic anemia associated with iron overload.
Case Presentation: An 81-year-old Caucasian male was admitted for fatigue. He had type-2 diabetes previously treated with metformin, ischemic cardiac insufficiency, and stage-3 chronic kidney disease. Vitiligo was observed on both hands. Biological tests revealed normocytic non-regenerative anemia associated with hemolysis, thrombocytopenia, and elevated sideremia, ferritin, and transferrin saturation levels. Megaloblastic anemia was confirmed with undetectable blood vitamin B12 and typical cytological findings like hyper-segmented neutrophils in blood and megaloblasts in bone marrow. The patient received vitamin B12 supplementation. At 3 months, biological parameters reached normal values. Hepcidin kinetics from diagnosis to 3 months inversely correlated with those of erythroferrone and growth differentiation factor-15.
Conclusions: This case suggests that iron-overload mechanisms of dyserythropoietic anemias may apply to megaloblastic anemias.
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http://dx.doi.org/10.1186/s13256-021-03065-0 | DOI Listing |
Adv Exp Med Biol
July 2025
The Tisch Cancer Institute, Division of Hematology and Medical Oncology, Tisch Cancer Center, Icahn School of Medicine at Mount Sinai, New York, NY, USA.
Erythropoiesis is a process by which red blood cells (RBCs) are produced in the adult bone marrow. It involves the differentiation of erythroid progenitor cells into mature RBCs, which transport oxygen from the lungs to all cells in the body. Erythropoiesis is a complex process with a nuanced crosstalk of regulation involving hormones, cytokines, and growth factors.
View Article and Find Full Text PDFAdv Exp Med Biol
July 2025
Center for Iron Disorders, Department of Medicine, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, CA, USA.
Iron, a versatile electron donor and acceptor, is essential for life as a component of enzymes and oxygen transporters but also has the potential to cause toxicity when in excess. Its dietary absorption as well as plasma and tissue concentrations are subject to close regulation, systemically coordinated by the interaction of the hepatic peptide hormone hepcidin and its cellular receptor, the iron exporter ferroportin. Ferroportin mediates the delivery of iron to plasma from absorptive enterocytes, from macrophages that digest senescent erythrocytes, and from iron-storing hepatocytes.
View Article and Find Full Text PDFInt J Mol Sci
October 2024
Laboratory of Iron Molecular Biology, Department of Molecular Biology, Institute of Genetics and Animal Biotechnology, Polish Academy of Sciences, 05-552 Jastrzębiec, Poland.
Life Sci
June 2024
Applied Oxygen Physiology Project, New Industry Creation Hatchery Center, Tohoku University, Seiryo-machi 2-1, Aoba-ku, Sendai, Miyagi 980-8575, Japan; Division of Oxygen Biology, Tohoku University Graduate School of Medicine, Seiryo-machi 2-1, Aoba-ku, Sendai, Miyagi 980-8575, Japan. Electronic add
J Biol Chem
January 2024
Department of Molecular and Cellular Biosciences, University of Cincinnati, Cincinnati, Ohio, USA. Electronic address:
Hepcidin, a peptide hormone that negatively regulates iron metabolism, is expressed by bone morphogenetic protein (BMP) signaling. Erythroferrone (ERFE) is an extracellular protein that binds and inhibits BMP ligands, thus positively regulating iron import by indirectly suppressing hepcidin. This allows for rapid erythrocyte regeneration after blood loss.
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