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- Title
Inhalation of Carboxymethyl Chitosan Alleviates Posttraumatic Tracheal Fibrosis.
- Authors
Huang, Rushi; Chen, Shicai; Song, Xianmin; Zheng, Hongliang
- Abstract
Objectives: The present study was performed to determine whether the inhalation of carboxymethyl (CM)-chitosan can alleviate tracheal fibrosis in a rabbit model. Methods: We designed a rabbit model of tracheal stenosis involving electrocoagulation with a spherical electrode. Twenty New Zealand white rabbits were randomly divided into experimental and control groups (10 animals each). Tracheal damage was successfully established by electrocoagulation in all animals. The experimental group was given CM-chitosan (inhalation for 28 days), while the control group inhaled saline. The effects of CM-chitosan inhalation on tracheal fibrosis were analyzed. Laryngoscopy was performed to evaluate and grade tracheal granulation, while tracheal fibrosis was evaluated by histological examination. The effects of CM-chitosan inhalation on the tracheal mucosa were examined by scanning electron microscopy (SEM), and hydroxyproline content in tracheal scar tissue was determined by enzyme-linked immunosorbent assay (ELISA). Results: Laryngoscopy showed that the tracheal cross-sectional area was smaller in the experimental than control group. The amounts of loose connective tissue and damaged cartilage, as well as the severity of collagen and fibrosis, decreased following inhalation of CM-chitosan. According to the ELISA, the experimental group had low levels of hydroxyproline in the tracheal scar tissue. Conclusion: The findings presented here showed that inhalation of CM-chitosan mitigated posttraumatic tracheal fibrosis in a rabbit model, thus suggesting a potential new treatment for tracheal stenosis.
- Subjects
TRACHEA physiology; TRACHEA injuries; POLYSACCHARIDES; BIOMARKERS; TRACHEAL diseases; ANIMAL experimentation; ELECTROCOAGULATION (Medicine); SCANNING electron microscopy; SCARS; FIBROSIS; RABBITS; TREATMENT effectiveness; PROLINE; ENZYME-linked immunosorbent assay; INHALATION administration; STATISTICAL sampling; LARYNGOSCOPY; EVALUATION
- Publication
Annals of Otology, Rhinology & Laryngology, 2024, Vol 133, Issue 1, p50
- ISSN
0003-4894
- Publication type
Article
- DOI
10.1177/00034894231181749