Effect of statins on fibroblasts from human nasal polyps and turbinates.

BACKGROUND Statins are serum cholesterol-lowering agents used for the prevention and treatment of atherosclerotic vascular disease. There is, however, growing evidence that statins have immunomodulatory and anti-inflammatory activities and may prove invaluable in the treatment of immunological and inflammatory disorders. OBJECTIVE On these basis we evaluated the effect of statins on the proliferation of fibroblasts derived from human nasal polyps and turbinates and determined their ability to modulate airway remodelling. METHODS Fluvastatin (0.01-0.1-1 microM), Atorvastatin (0.1-1-10 microM) and Simvastatin (0.1-1-10 microM) were tested on cultured fibroblasts derived from human nasal polyps and turbinates stimulated or not with Fibroblast Growth Factor beta (10 ng/ml). All cultures were treated with 3H-Thymidine (1 microCi/ml) to test cell proliferation. RESULTS Our results show that proliferation of turbinate-derived fibroblasts is significantly inhibited by the three statins. Fluvastatin is already effective at the lowest dose (0.01 microM), whereas Atorvastatin and Simvastatin act at the plasmatic peak concentration (1 microM). No significant effect was found on fibroblasts derived from nasal polyps, except for Simvastatin which was effective after 144 hours of stimulation. CONCLUSIONS These drugs show a remarkable antiprolhferative effect and their different outcome depending on the different kind of fibroblasts in vitro is prompting news in the studies about statin use for the treatment of chronic inflammatory diseases.