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Exhaled nitric oxide and tracheal endothelin-1 in preterm infants with and without RDS

Steven L Olsen1, Perry L Clark, Donald W Thibeault

  • 1Section of Neonatology, Department of Pediatrics, Children's Mercy Hospitals and Clinics, University of Missouri-Kansas City School of Medicine, Kansas City, Missouri 64108, USA.

Pediatric Pulmonology
|October 2, 2003
PubMed

Insights

Exhaled nitric oxide (NO) levels were higher in preterm infants with respiratory distress syndrome (RDS) but decreased as their condition improved. Endothelin-1 was detectable in all infants studied.

Area of Science:

  • Neonatal Medicine
  • Pulmonary Physiology
  • Biomarker Research

Background:

  • Respiratory distress syndrome (RDS) significantly impacts preterm infants' pulmonary function.
  • Nitric oxide (NO) and endothelin-1 (ET-1) are implicated in pulmonary vascular regulation.
  • Understanding biomarkers in RDS is crucial for improved management.

Purpose of the Study:

  • To investigate the relationship between exhaled nitric oxide (V(NO)) and endothelin-1 (ET-1) in preterm infants with RDS.
  • To compare V(NO) and ET-1 levels in infants with and without RDS.
  • To correlate these biomarkers with pulmonary gas exchange during RDS.

Main Methods:

  • Exhaled nitric oxide (V(NO)) was measured online in infants with and without RDS.
  • Tracheal aspirate endothelin-1 (ET-1) was quantified using immunoassay.
  • Measurements were taken at specific time points in relation to RDS severity and control status.

Main Results:

  • Median V(NO) was significantly higher in infants with RDS compared to controls (P < 0.001).
  • V(NO) in RDS infants decreased significantly over time as gas exchange improved (P < 0.01).
  • ET-1 was detectable in tracheal aspirates of both RDS and control infants, with no significant correlation to V(NO).

Conclusions:

  • Exhaled nitric oxide (V(NO)) levels decrease in preterm infants with respiratory distress syndrome as pulmonary gas exchange improves.
  • Endothelin-1 (ET-1) is present in tracheal aspirates of preterm infants, irrespective of RDS status.
  • V(NO) may serve as a dynamic biomarker for monitoring RDS recovery.

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