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Selenium status in neonates with connatal infection

  • Lennart Wiehe (a1), Malte Cremer (a2), Monika Wisniewska (a1), Niels-Peter Becker (a1), Eddy Rijntjes (a1), Janine Martitz (a1), Sandra Hybsier (a1), Kostja Renko (a1), Christoph Bührer (a2) and Lutz Schomburg (a1)...

Abstract

Infectious diseases impair Se metabolism, and low Se status is associated with mortality risk in adults with critical disease. The Se status of neonates is poorly characterised, and a potential impact of connatal infection is unknown. We hypothesised that an infection negatively affects the Se status of neonates. We conducted an observational case–control study at three intensive care units at the Charité-Universitätsmedizin Berlin, Germany. Plasma samples were collected from forty-four neonates. On the basis of clinical signs for bacterial infection and concentrations of IL-6 or C-reactive protein, neonates were classified into control (n 23) and infected (n 21) groups. Plasma Se and selenoprotein P (SePP) concentrations were determined by X-ray fluorescence and ELISA, respectively, at day of birth (day 1) and 48 h later (day 3). Se and SePP showed a positive correlation in both groups of neonates. Se concentrations indicative of Se deficit in adults (<20 µg/l) were observed in four infected neonates and one control subject, and three infected neonates had very low SePP concentrations (<0·5 mg/l). The univariate analysis revealed a significant difference in Se and SePP concentrations between the groups. Both parameters correlated inversely to IL-6 in neonates with severe inflammation (IL-6>500 ng/l). During antibiotic therapy, SePP increased significantly from day 1 (1·03 (sd 0·10) mg/l) to day 3 (1·34 (sd 0·10) mg/l), indicative of improved hepatic Se metabolism. We conclude that both Se and SePP are suitable biomarkers for assessing Se status in neonates and for identifying subjects at risk of deficiency.

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* Corresponding author: L. Schomburg, fax +49 30 450 524922, email: lutz.schomburg@charite.de

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These authors contributed equally to this work.

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References

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