Anti-allergic agent tranilast decreases development of obliterative airway disease in rat model of heterotopic tracheal transplantation

Yoshinori Okada, Yuji Matsumura, Kazuyoshi Shimada, Tetsu Sado, Takeshi Oyaizu, Takafumi Sugawara, Yasushi Matsuda, Yasushi Hoshikawa, Hiroto Takahashi, Masami Sato, Takashi Kondo

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)


Background Tranilast is an anti-allergic agent known to inhibit the release of histamine, interleukin-1β, transforming growth factor β1, and platelet-derived growth factor from various cells and currently is used to treat allergic diseases, keloids, and hypertrophic scars. We evaluated the ability of tranilast to inhibit the development of obliterative airway disease (OAD) in a rat model of heterotopic tracheal transplantation. Methods We transplanted tracheal segments from donor rats (Brown Norway) into subcutaneous pouches in major histocompatibility complex-incompatible recipient rats (Lewis). At Days 21 and 28 after transplantation, we histologically assessed the harvested allografts scored the degree of OAD, on a scale from zero to 4 as previously described, caused by fibroproliferative tissue. Results Recipient animals treated orally with 400 mg/kg/day tranilast throughout the experiment showed significantly decreased OAD compared with control animals, with a histologic score of 1.1 ± 0.4 vs 3.0 ± 1.3, respectively (mean ± SD, p = 0.007), at Day 21 after transplantation and 2.0 ± 1.4 vs 3.9 ± 0.4, respectively (mean ± SD, p = 0.017), at Day 28 after transplantation. Conclusion These results showed that treatment with tranilast significantly decreased fibroproliferative airway changes associated with allograft rejection in a rat model of tracheal transplantation, suggesting that tranilast may be useful in preventing bronchiolitis obliterans after lung transplantation.

Original languageEnglish
Pages (from-to)1392-1395
Number of pages4
JournalJournal of Heart and Lung Transplantation
Issue number12
Publication statusPublished - 12-2004
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Surgery
  • Pulmonary and Respiratory Medicine
  • Cardiology and Cardiovascular Medicine
  • Transplantation


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