Abstract | BACKGROUND: Acquired airway stenosis in childhood is resistant to conventional treatment. We examined whether endoscope-assisted photodynamic therapy ( PDT) is effective for airway stenosis in animal models of which the pathophysiologic progressions are similar to those of clinical cases showing rapid deterioration. METHODS: Tracheal mucosa-scraped rabbits were administered IV porfimer sodium ( Photofrin; Wyeth K.K., Tokyo, Japan) [2 mg/kg], and the tracheal lesions were irradiated with 630 nm of light emitted from a cylindrical diffuser tip via a transtracheal approach. RESULTS: Rabbits without PDT (untreated animals) showed dense granulation tissue in the scraped lesion, resulting in airway stenosis complicated with respiratory stridor. PDT ameliorated the degree of airway stenosis (p = 0.008) and reduced respiratory stridor; rabbits that received PDT showed patchy granulation tissue that was only 20 to 30% of the volume of that seen in the untreated animals. Survival time of rabbits that received PDT was significantly prolonged compared with that of untreated animals (p = 0.03). CONCLUSIONS:
PDT was effective for airway stenosis in rabbit models. This suggests that PDT has the potential as a new therapeutic method for airway stenosis originating from granulation tissue.
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Authors | Yoshinori Nakagishi, Yuji Morimoto, Masanori Fujita, Noriko Morimoto, Yuichi Ozeki, Tadaaki Maehara, Makoto Kikuchi |
Journal | Chest
(Chest)
Vol. 133
Issue 1
Pg. 123-30
(Jan 2008)
ISSN: 0012-3692 [Print] United States |
PMID | 17908702
(Publication Type: Journal Article, Research Support, Non-U.S. Gov't)
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Topics |
- Animals
- Disease Models, Animal
- Male
- Photochemotherapy
- Rabbits
- Tracheal Stenosis
(drug therapy)
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