Zinc content and distribution in the newborn liver

Pierpaolo Coni, Alberto Ravarino, Anna Maria Giulia Farci, Francesco Callea, Peter Van Eyken, Raf Sciot, Rossano Ambu, Andrea Marras, Virgilio Costa, Gavino Faa, Valeer J. Desmet

Research output: Contribution to journalArticlepeer-review

Abstract

The newborn liver is a proven model for the study of liver storage of copper and iron. We analyzed zinc concentration and distribution in the livers of newborns and infants using a systematic tissue-sampling technique. We studied 14 newborns of 26-41 weeks of gestation (WG). One stillborn, and three infants (52-90 days old). At autopsy, a longitudinal liver slice extending from the right to the left lobe was subdivided into 10 samples that were analyzed for zinc concentration by atomic absorption spectroscopy. The mean zinc concentration in the newborn liver was 639 μg/g of dry tissue (dt). A striking interindividual variability in zinc liver stores was observed; the hepatic concentration of the metal ranged from 300 to 1,400 μg/g dt. We found a correlation between zinc liver content and gestational age. In newborns of 27-32 WG, the hepatic zinc concentration was significantly higher (p <0.01) than in newborns of 34-41 WG. Zinc stores decreased in the postnatal period; in the infant group, the mean liver zinc concentration was 148 μg/g dt. The analysis of zinc concentration in 10 blocks from each liver revealed a regular distribution of the metal, without significant differences between liver lobes. Our data show that the newborn liver can be considered an interesting model for the study of zinc storage, which appears to correlate inversely with gestational age. From a practical point of view, the observed regular distribution of zinc implies that, at least in this model, zinc content determined in a small liver sample is representative of zinc content in the whole liver.

Original languageEnglish
Pages (from-to)125-129
Number of pages5
JournalJournal of Pediatric Gastroenterology and Nutrition
Volume23
Issue number2
DOIs
Publication statusPublished - 1996

Keywords

  • Metals
  • Newborn liver
  • Sampling variability
  • Zinc

ASJC Scopus subject areas

  • Gastroenterology
  • Histology
  • Medicine (miscellaneous)
  • Food Science
  • Pediatrics, Perinatology, and Child Health

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