The Effect of Hematin on Bilirubin Binding in Bilirubin-Enriched Neonatal Cord Serum
- 1 January 1984
- journal article
- research article
- Published by S. Karger AG in Neonatology
- Vol. 45 (2), 53-57
- https://doi.org/10.1159/000241777
Abstract
It has been suggested that the serum of infants with ABO hemolytic disease contains hematin which might interfere with bilirubin binding to albumin, increasing the risk of kernicterus. Using the horseradish peroxidase assay, we investigated this possibility. Cord serum from healthy term infants was enriched with bilirubin to a bilirubin/albumin molar ratio of 0.6, and then varying amounts of hematin were added. Hematin had a significant adverse effect on bilirubin binding when present in half to equimolar ratios with bilirubin. This high concentration of hematin does not appear to be present in serum from infants with ABO hemolytic disease and no difference was seen when comparing the dilute and the undilute peroxidase assays. These data suggest that hematin can alter bilirubin binding in neonatal serum but is not of physiologic importance for infants with ABO-isoimmune hemolysis.Keywords
This publication has 2 references indexed in Scilit:
- Experimental bilirubin encephalopathy. The mode of entry of bilirubin-14C into the central nervous system.JCI Insight, 1966
- Protein Binding of Hematin in the NewbornArchives of Pediatrics & Adolescent Medicine, 1963