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Related Experiment Videos

Surfactant replacement: immunological considerations.

D S Strayer1, T A Merritt, M Hallman

  • 1Department of Pathology and Laboratory Medicine, University of Texas, Houston.

The European Respiratory Journal. Supplement
|March 1, 1989
PubMed
Summary
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Circulating immune complexes of surfactant and anti-surfactant antibodies are common in neonatal respiratory distress syndrome (RDS) but do not cause harm. Further evaluation of immune reactions to surfactants used in RDS treatment is recommended.

Area of Science:

  • Neonatal immunology
  • Pulmonary medicine
  • Biochemistry

Background:

  • Neonatal respiratory distress syndrome (RDS) is a common condition in premature infants.
  • Surfactant replacement therapy is a standard treatment for RDS.
  • The potential immunogenicity of administered surfactants requires investigation.

Purpose of the Study:

  • To analyze the immunogenicity of human alveolar surfactant used in neonatal respiratory distress syndrome (RDS) treatment.
  • To determine if surfactant-anti-surfactant immune complexes form in infants with RDS.
  • To assess for evidence of immune complex-mediated tissue damage.

Main Methods:

  • Development of an enzyme-linked immunosorbent assay (ELISA) for detecting surfactant-antibody immune complexes.

Related Experiment Videos

  • Analysis of plasma samples from premature infants with and without RDS.
  • Clinical and serological examination for immune complex-mediated tissue damage and complement levels.

    • Main Results:

    • Circulating surfactant-anti-surfactant immune complexes were detected in almost all infants with RDS, regardless of therapy.
    • These immune complexes were absent in infants without RDS.
    • Immune complexes appeared early postnatally and diminished over time, with no evidence of end-organ damage or altered complement levels.

    Conclusions:

    • Circulating immune complexes involving surfactant are prevalent in neonatal respiratory distress syndrome.
    • These complexes, while common, do not appear to cause significant clinical injury.
    • Cautious evaluation of immune reactions to both human and heterologous surfactants used in RDS treatment is warranted.