Plasma hepcidin is a modest predictor of dietary iron bioavailability in humans, whereas oral iron loading, measured by stable-isotope appearance curves, increases plasma hepcidin.
Article Details
- CitationCopy to clipboard
Zimmermann MB, Troesch B, Biebinger R, Egli I, Zeder C, Hurrell RF
Plasma hepcidin is a modest predictor of dietary iron bioavailability in humans, whereas oral iron loading, measured by stable-isotope appearance curves, increases plasma hepcidin.
Am J Clin Nutr. 2009 Nov;90(5):1280-7. doi: 10.3945/ajcn.2009.28129. Epub 2009 Sep 9.
- PubMed ID
- 19740974 [ View in PubMed]
- Abstract
BACKGROUND: Plasma hepcidin appears to be a major regulator of iron absorption and homeostasis, but there are few data in humans. OBJECTIVES: With the use of iron stable isotopes, we aimed to determine whether circulating hepcidin predicts dietary iron bioavailability, to quantify the amount of absorbed iron after oral iron loading, and to measure the plasma hepcidin response. DESIGN: In the first study, young women (n = 98) with an iron status varying from iron deficiency anemia to iron sufficiency (women with serum ferritin concentrations 25-40 microg/L were not included) were given stable isotope-labeled test meals (n = 196) containing ferrous sulfate, ferrous fumarate, or ferric pyrophosphate, after which plasma hepcidin and iron bioavailability were measured. In the second study, iron-sufficient men (n = 4) were given 3.8- and 60-mg oral doses of labeled ferrous sulfate. The stable isotope appearance curve was determined, and the plasma hepcidin response was measured over 6 h. RESULTS: In study 1, plasma hepcidin and plasma ferritin were strongly correlated (r = 0.79, P < 0.001). Plasma hepcidin significantly, but modestly, predicted iron bioavailability from ferrous sulfate and ferrous fumarate (r = -0.51 and -0.46, respectively; P < 0.0001) but not from ferric pyrophosphate (r = -0.30, P = 0.056, respectively). In study 2, the 3.8-mg dose increased mean circulating absorbed iron to a peak of 0.42 micromol/L at 60 min but did not increase plasma hepcidin, The 60-mg dose increased mean circulating absorbed iron to a peak of 5.9 micromol/L at 120 min and produced an approximately 30% increase in mean plasma hepcidin at 6 h (P < 0.01). CONCLUSIONS: Plasma hepcidin is only a modest predictor of dietary iron bioavailability in humans. Oral iron loading, measured by stable-isotope appearance curves, increases circulating hepcidin.
DrugBank Data that Cites this Article
- Drug Enzymes
Drug Enzyme Kind Organism Pharmacological Action Actions Ferrous sulfate anhydrous Hepcidin Protein Humans UnknownSubstrateDetails