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Related Experiment Videos

Host defence lectins in preterm neonates.

Anne Hilgendorff1, Reinhold Schmidt, Anette Bohnert

  • 1Department of Paediatrics and Neonatology, Immunology and Transfusion Medicine, and Medical Microbiology, Giessen Research Centre in Infectious Diseases (GRID), Justus-Liebig-University Giessen, Germany. anne.hilgendorff@paediat.med.uni-giessen.de

Acta Paediatrica (Oslo, Norway : 1992)
|September 29, 2005
PubMed
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Preterm infants have lower levels of surfactant protein D (SP-D) and mannose-binding lectin (MBL) at birth. These collectin changes may impact infection risk in premature infants.

Area of Science:

  • Neonatal immunology
  • Pulmonary medicine
  • Infectious disease

Background:

  • Collectins, including surfactant protein D (SP-D) and mannose-binding lectin (MBL), are crucial for innate immunity.
  • Collectin deficiencies are linked to increased susceptibility to pulmonary and systemic infections in both children and adults.

Purpose of the Study:

  • To determine and compare serum concentrations of SP-D and MBL in preterm and term infants at birth.
  • To investigate SP-D levels in tracheal aspirates of preterm infants.

Main Methods:

  • Umbilical cord blood samples were collected from 47 preterm infants (<32 weeks gestational age) and 19 term infants.
  • Serum SP-D and MBL concentrations were measured using sandwich ELISA.
  • SP-D levels in tracheal aspirates were assessed in mechanically ventilated preterm infants.

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Main Results:

  • MBL serum concentrations were significantly lower in preterm infants (<32 weeks GA) compared to term newborns (p=0.005).
  • Serum SP-D concentrations were significantly decreased in preterm infants (28-32 weeks GA) versus term infants (p=0.05).
  • Pulmonary SP-D levels varied in preterm infants with respiratory distress syndrome based on gestational age.

Conclusions:

  • Preterm infants exhibit altered umbilical cord blood concentrations of collectins (SP-D and MBL).
  • Pulmonary SP-D levels also show significant changes in preterm infants.
  • Further research is needed to understand the functional implications of these collectin alterations.