Related Experiment Videos
Bronchoscopy induces intestinal mucosal barrier dysfunction: a possible role for nitric oxide
Ali Nayci1, Sibel Atis, Derya Umit Talas
1Department of Pediatric Surgery, School of Medicine, Mersin University, Mersin, Turkey. anayci@mersin.edu.tr
International Journal of Pediatric Otorhinolaryngology
|August 9, 2003
Summary
Bronchoscopy significantly damages the intestinal barrier in rats, increasing nitric oxide (NO) production. This NO elevation correlates with mucosal injury, potentially explaining bacterial translocation post-procedure.
Area of Science:
- Gastroenterology
- Pulmonology
- Surgical Research
Background:
- Bronchoscopy is a common medical procedure.
- Intestinal mucosal barrier integrity is crucial for health.
- Nitric oxide (NO) plays complex roles in gastrointestinal function.
Purpose of the Study:
- To investigate the impact of bronchoscopy on intestinal mucosal barrier function.
- To examine the relationship between bronchoscopy and intestinal nitric oxide production.
- To explore potential mechanisms of post-bronchoscopy complications.
Main Methods:
- A rat model was utilized with a study group (n=15) undergoing rigid bronchoscopy.
- Ileal tissue was analyzed 24 hours post-procedure for nitrite/nitrate levels.
- Intestinal mucosal damage was assessed using Chiu's histologic injury scale.
Main Results:
- Bronchoscopy led to significantly elevated ileal nitrite/nitrate levels compared to controls (P=0.001).
- Significant intestinal mucosal damage was observed in the bronchoscopy group (P<0.0001), including architectural distortion and ulceration.
- A positive correlation was found between elevated ileal nitrite/nitrate levels and the severity of mucosal damage (rs=0.56, P=0.03).
Conclusions:
- Bronchoscopy induces intestinal mucosal barrier dysfunction.
- Excessive intestinal nitric oxide production is associated with this dysfunction.
- These findings suggest a role for NO in bacterial translocation following bronchoscopy.