Related Experiment Videos
Autoimmune hypothesis of acquired subglottic stenosis in premature infants
1Section of Otolaryngology, Emory University School of Medicine, Atlanta, GA.
Insights
Premature infants can develop acquired subglottic stenosis. This study suggests an autoimmune response to type-II collagen may contribute to this condition, potentially leading to new diagnostic and therapeutic approaches.
Area of Science:
- Neonatal Medicine
- Immunology
- Otolaryngology
Background:
- Acquired subglottic stenosis affects nearly 4% of premature infants in neonatal intensive care.
- Endotracheal intubation duration is a primary risk factor, yet outcomes vary significantly among infants with similar care.
- The variability in laryngeal outcomes suggests other contributing factors beyond intubation duration.
Purpose of the Study:
- To investigate a potential autoimmune mechanism involving type-II collagen in the development of acquired subglottic stenosis in premature infants.
- To explore the role of serum antibodies to type-II collagen in infants with varying laryngeal outcomes.
Main Methods:
- A retrospective study compared premature infants with and without subglottic stenosis.
- Infants were matched for comparable birth weight, gestational age, and duration of endotracheal intubation.
- Serum antibodies to type-II collagen were assessed in affected infants and controls.
Main Results:
- Contrary to expectations, control infants (without airway obstruction) had longer intubation durations than those who developed subglottic stenosis.
- Three out of five infants with acquired subglottic stenosis exhibited serum antibodies to type-II collagen.
- None of the control infants tested positive for these antibodies (P = .035).
Conclusions:
- The presence of serum antibodies to type-II collagen in affected infants suggests a potential autoimmune link to acquired subglottic stenosis.
- This finding warrants further investigation and may pave the way for novel diagnostic and therapeutic strategies.
- Understanding the autoimmune component could improve management and outcomes for premature infants at risk.
Abstract:
Acquired subglottic stenosis is a devastating additional burden for nearly 4% of premature infants receiving neonatal intensive care. The duration of endotracheal intubation is considered the most important etiologic factor. Surprisingly, most premature infants do not acquire subglottic stenosis. Infants with similar clinical characteristics and care have varying laryngeal outcomes. We hypothesized an autoimmune mechanism to type-II collagen to explain the varying laryngeal outcomes of these infants. A retrospective study of premature infants of comparable birth weight, gestational age, and duration of endotracheal intubation was conducted. The eight control children, who did not manifest symptoms of airway obstruction, had longer durations of intubation than did the infants who developed subglottic stenosis. Three of five affected infants had serum antibodies to type-II collagen, in contrast to none of the control infants (P = .035). This finding warrants additional study, and might lead to new diagnostic and therapeutic measures for these patients.