Aytemur, Z. AyferHacievliyagil, S. SavasIraz, M.Samdanci, E.Ozerol, E.Kuku, I.Nurkabulov, Z.2024-08-042024-08-0420120873-2159https://doi.org/10.1016/j.rppneu.2012.04.010https://hdl.handle.net/11616/96030Objective: Prostacyclin (PGI2) has been shown to inhibit the expression of pro-inflammatory and pro-fibrotic mediators in pulmonary fibrosis. In this study, we aimed to test the preventive effects of intraperitoneally administered iloprost, a stable PGI2 analog, on bleomycin-induced pulmonary fibrosis in rats and to compare the effects of iloprost with the effects of methylprednisolone, a traditional therapy. Methods: Rats were randomly allocated into four groups: 1. Saline alone (n = 6); 2. Bleomycin + placebo (n = 7); 3. Bleomycin + methyl-prednisolone (n = 7); 4. Bleomycin + iloprost (n = 7). Fibrotic changes in the lungs were demonstrated by analyzing the cellular composition of bronchoalveolar lavage fluid, histological evaluation and lung hydroxyproline content. Results: Fibrosis was made in the lungs of rats by bleomycin experimentally. Fibrosis scores in the methyl-prednisolone and the iloprost groups were significantly lower than in the placebo group (p < 0.05). Furthermore, the score of the iloprost group was significantly lower than the score of the methyl-prednisolone group. The hydroxyproline content was significantly less in the methyl-prednisolone and the iloprost groups (p < 0.05). In the placebo group, the neutrophil percentage in bronchoalveolar lavage was significantly higher than in the other groups, whereas the macrophage percentage in placebo group was significantly lower (p < 0.05). Conclusion: Iloprost has protective effect on the pulmonary fibrosis induced by bleomycin and it may be more effective in decreasing fibrotic changes than methyl-prednisolone. (C) 2011 Sociedade Portuguesa de Pneumologia. Published by Elsevier Espana, S. L. All rights reserved.eninfo:eu-repo/semantics/openAccessPulmonary fibrosisBleomycinIloprostMethyl-prednisoloneRatsArticle1862722772277081710.1016/j.rppneu.2012.04.0102-s2.0-84876807442N/AWOS:000310782800005Q4