In vitro study of cyclosporine A 0.05 % on primary and recurrent pterygium fibroblasts.

To compare the cyclosporine 0.05 % exposure effect on fibroblasts from primary and recurrent pterygium. Primary culture of fibroblasts from primary and recurrent pterygium was performed until the third passage, which was exposed to cyclosporine 0.05 % in a group and the other remaining unexposed (control group), in triplicates. After 3, 6, 12, and 17 days of exposure the viable cell counting was performed by hemocytometer. The results were statistically analyzed using the technique of analysis of non-parametric variance model for repeated measures with three factors. There was a significant reduction in both fibroblast proliferation, in primary as in the recurrent pterygium cultures exposed to cyclosporine when compared not exposed cultures, with statistical significance (P < 0.05). Comparing primary and recurrent pterygium that received the drug, there was no significant difference in cell proliferation in relation to primary or recurrent pterygium. Cyclosporine 0.05 % is effective in inhibiting fibroblast proliferation in culture, both in primary and as in recurrent pterygium.

Exposição de fibroblastos da cápsula de Tenon de pterígios à ciclosporina 0.05 por cento / Exposure of Tenon's capsule fibroblasts of pterygium to cyclosporin 0.05 percent

OBJETIVO: Avaliar o comportamento dos fibroblastos da cápsula de Tenon de pterígios e normais em cultura, quando expostos a ciclosporina 0,05 por cento. MÉTODOS: Estudo prospectivo, controlado, do qual participaram 20 portadores de pterígio primário. Foram colhidas amostras da cápsula de Tenon normal e proveniente do pterígio, ambas do mesmo indivíduo, colocadas para crescimento em cultura e expostas a ciclosporina 0,05 por cento. As avaliações foram feitas aos 3, 6, 12 e 17 dias após a exposição. RESULTADOS: Das amostras colhidas, 7 foram utilizadas para exposição a ciclosporina - 6 provenientes de pterígios e 1 da Tenon normal. Houve redução significativa na proliferação celular das culturas de fibroblastos expostos a ciclosporina (p<0,05). CONCLUSÃO: A ciclosporina 0,05 por cento é capaz de inibir a proliferação de fibroblastos provenientes da cápsula de Tenon de pterígio e também da Tenon normal. Novos estudos devem ser providenciados para definir o papel da ciclosporina no tratamento do pterígio.

PURPOSE: To evaluate normal Tenon capsule fibroblasts and from pterygia in culture when exposed to cyclosporin 0.05 percent. METHODS: A prospective, randomized study was done, involving 20 patients with primary pterygium. Samples of normal and pterygium Tenon's capsule from the same individual were collected, cultured and exposed to cyclosporin 0.05 percent. RESULTS: Only 7 samples could be exposed to cyclosporin - 6 from pterygial Tenon's capsule and 1 from normal Tenon's capsule. There was a significant reduction of cellular proliferation in the cyclosporin exposed cultures (p<0.05). CONCLUSION: Cyclosporin 0.05 percent is effective to inhibit the proliferation of pterygia and normal Tenon's capsule fibroblasts. Further studies should be performed to define the role of cyclosporin in pterygium treatment.

[Exposure of Tenon's capsule fibroblasts of pterygium to cyclosporin 0.05%]. / Exposição de fibroblastos da cápsula de Tenon de pterígios à ciclosporina 0,05%

PURPOSE: To evaluate normal Tenon capsule fibroblasts and from pterygia in culture when exposed to cyclosporin 0.05%. METHODS: A prospective, randomized study was done, involving 20 patients with primary pterygium. Samples of normal and pterygium Tenon's capsule from the same individual were collected, cultured and exposed to cyclosporin 0.05%. RESULTS: Only 7 samples could be exposed to cyclosporin--6 from pterygial Tenon's capsule and 1 from normal Tenon's capsule. There was a significant reduction of cellular proliferation in the cyclosporin exposed cultures (p<0.05). CONCLUSION: Cyclosporin 0.05% is effective to inhibit the proliferation of pterygia and normal Tenon's capsule fibroblasts. Further studies should be performed to define the role of cyclosporin in pterygium treatment.