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Increased airway leukotriene levels in infants with severe bronchopulmonary dysplasia
R Mirro1, W Armstead, C Leffler
1Department of Pediatrics, University of Tennessee, Memphis.
Insights
Leukotrienes were elevated in tracheal lavage fluid from infants with bronchopulmonary dysplasia, suggesting a role in this disease. This finding highlights leukotrienes in infant respiratory conditions.
Area of Science:
- Neonatal Medicine
- Respiratory Medicine
- Biochemistry
Background:
- Sulfidopeptide leukotrienes (C4, D4, E4) are known potent airway constrictors.
- These leukotrienes have been previously detected in infants with pulmonary hypertension and viral infections.
Purpose of the Study:
- To investigate the hypothesis that leukotriene levels are elevated in tracheal lavage fluid of infants diagnosed with bronchopulmonary dysplasia.
- To explore the potential role of leukotrienes in the pathophysiology of bronchopulmonary dysplasia.
Main Methods:
- Radioimmunoassay was used to determine leukotriene levels in tracheal lavage fluid.
- The study included 26 intubated infants: 10 with bronchopulmonary dysplasia, 9 with hyaline membrane disease, and 7 normal controls.
Main Results:
- Tracheal lavage fluid from infants with severe bronchopulmonary dysplasia showed significantly increased leukotriene levels.
- Elevated concentrations of alveolar macrophages were also observed in infants with severe bronchopulmonary dysplasia.
Conclusions:
- The increased concentration of leukotrienes in infants with bronchopulmonary dysplasia suggests their involvement in the disease's pathophysiology.
- Leukotrienes may represent a therapeutic target for bronchopulmonary dysplasia.
Abstract:
The sulphidopeptide leukotrienes (C4, D4, and E4) are potent airway constrictors that have been detected in the airways of infants with pulmonary hypertension and viral infections. The present study was undertaken to test the hypothesis that leukotrienes in tracheal lavage fluid are elevated in bronchopulmonary dysplasia. Twenty-six intubated infants (10 with bronchopulmonary dysplasia, 9 with hyaline membrane disease, and 7 normal controls) had tracheal lavage leukotriene levels determined by radioimmunoassay. Lavage fluid cell counts (alveolar macrophages) and leukotriene levels were significantly increased in infants with severe bronchopulmonary dysplasia. The increased concentration of leukotrienes seen in the infants with bronchopulmonary dysplasia would suggest a possible role for these compounds in the pathophysiology of this disease.