Hepcidin, Serum Iron, and Transferrin Saturation in Full-Term and Premature Infants during the First Month of Life: A State-of-the-Art Review of Existing Evidence in Humans.

Neonates regulate iron at birth and in early postnatal life. We reviewed literature from PubMed and Ovid Medline containing data on umbilical cord and venous blood concentrations of hepcidin and iron, and transferrin saturation (TSAT), in human neonates from 0 to 1 mo of age. Data from 59 studies were used to create reference ranges for hepcidin, iron, and TSAT for full-term-birth (FTB) neonates over the first month of life. In FTB neonates, venous hepcidin increases 100% over the first month of life (to reach 61.1 ng/mL; 95% CI: 20.1, 102.0 ng/mL) compared with umbilical cord blood (29.7 ng/mL; 95% CI: 21.1, 38.3 ng/mL). Cord blood has a high concentration of serum iron (28.4 μmol/L; 95% CI: 26.0, 31.1 μmol/L) and levels of TSAT (51.7%; 95% CI: 46.5%, 56.9%). After a short-lived immediate postnatal hypoferremia, iron and TSAT rebounded to approximately half the levels in the cord by the end of the first month. There were insufficient data to formulate reference ranges for preterm neonates

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The Regulation of Erythropoiesis in Protein‐Energy‐Malnutrition

The erythropoietin (ESF) content of plasma and urine has been studied in children with protein‐energy‐malnutrition (PEM) living in the Kivu province at an altitude of 1467–2000 m. On admission, packed cell volume (PCV) was moderately reduced; after 2 months of refeeding PCV had increased but was still lower than in the controls. Plasma ESF was increased on admission and in patients refed for 2 months. The expected positive correlation between serum and urine ESF levels was found after refeeding but not on admission; the last finding could not be explained by the presence of erythropoiesis inhibiting factor(s) in the urine. In spite of the normal 2,3‐DPG and P50 previously described in PEM in Kivu, the anaemia associated with this disease is not merely an adaptation to lowered oxygen consumption and there must be some disturbances in the responsiveness of bone marrow to ESF. The high ESF values observed after 2 months of refeeding confirm that the restoration of the red cell volume proceeds slowly. Copyright © 1978, Wiley Blackwell. All rights reservedSCOPUS: ar.jFLWNAinfo:eu-repo/semantics/publishe