27
views
0
recommends
+1 Recommend
1 collections
    0
    shares
      • Record: found
      • Abstract: found
      • Article: found
      Is Open Access

      Sistema de liberação contendo ciclosporina para o tratamento de ceratoconjuntivite seca: estudo preliminar Translated title: Cyclosporine-loaded delivery system for the treatment of keratoconjunctivitis sicca: a pilot study

      research-article

      Read this article at

      Bookmark
          There is no author summary for this article yet. Authors can add summaries to their articles on ScienceOpen to make them more accessible to a non-specialist audience.

          Abstract

          OBJETIVO: Este trabalho objetivou o desenvolvimento de um sistema mucoadesivo de liberação de ciclosporina A (CsA) para o tratamento de ceratoconjuntivite seca (CCS). MÉTODOS: O sistema mucoadesivo foi preparado na forma de filme utilizando o polímero quitosana e CsA (25%p/v). Foram administrados no saco conjuntival do olho direito de coelhos normais (n=6) e a aferição da produção de lágrimas foi realizada diariamente antes e após a aplicação, de forma bilateral, durante sete dias, por meio do teste lacrimal de Schirmer. Avaliação oftalmológica foi realizada diariamente durante todo o estudo e seguido da análise histológica. RESULTADOS: Os valores médios de produção de lágrimas foram alterados de 9,88 ± 0,37 mm/min para 16,02 ± 0,38 mm/min antes e após a administração do sistema respectivamente, significando um aumento de aproximadamente 60%. Todos os coelhos apresentaram hiperemia da conjuntiva palpebral e lacrimejamento. A hiperemia permaneceu durante 48 h após administração dos sistemas com resolução espontânea e o lacrimejamento foi diagnosticado até o final do experimento. Não foram observados outros sinais de reações indesejáveis. Nenhuma alteração histológica foi observada na mucosa conjuntival bulbar e palpebral à histopatologia. CONCLUSÃO: Os sistemas desenvolvidos são aparentemente seguros e eficientes criando expectativa para o tratamento da CCS. Novos estudos são necessários para avaliar a concentração de CsA liberada, assim como aceitabilidade e toxicidade dos sistemas em tratamentos mais prolongados.

          Translated abstract

          PURPOSE: The present work aimed to present the development of a conjunctival mucosa system for the controlled delivery of cyclosporine A (CsA) in the treatment of keratoconjunctivitis sicca (KCS). METHODS: The conjunctival mucosa system was prepared in the form of films containing chitosan as the polymer and CsA as the drug (25%w/v). The films were applied to the conjunctival sac of one eye from normal rabbits (n=6), and the evaluation of lachrymal production was performed daily, before and after application, for seven days. Clinical examination was executed daily on the eyes of each animal during the entire period of study. Histological analyses were carried out at the end of the study. RESULTS: The average amount of lachrymal production changed from 9.88 ± 0.37 mm/min to 16.02 ± 0.38 mm/min, respectively, before and after applying the systems, which indicates an increase of approximately 60%. All rabbits presented hyperemia in the palpebral conjunctiva and tearing. Hyperemia continued for 48h after the application of the systems with spontaneous resolution, and tearing was diagnosed throughout the entire study. No other sign of undesirable reactions could be observed. Moreover, no histological changes could be identified in the bulbar and palpebral conjunctival mucosa. CONCLUSION: The developed systems proved to be safe and efficient in this pilot study and present a promising future for the treatment of KCS. Other studies are warranted to evaluate the released concentration of CsA as well as the feasibility and toxicity of these systems in a more prolonged treatment.

          Related collections

          Most cited references23

          • Record: found
          • Abstract: not found
          • Article: not found

          Neurologic Evaluation of Acute Lacrimomimetic Effect of Cyclosporine in an Experimental Rabbit Dry Eye Model

            Bookmark
            • Record: found
            • Abstract: not found
            • Article: not found

            Effects of sequential artificial tear and cyclosporine emulsion therapy on conjunctival goblet cell density and transforming growth factor-beta2 production

              Bookmark
              • Record: found
              • Abstract: not found
              • Article: not found

              Prevalence of Dry Eye Among the Elderly

                Bookmark

                Author and article information

                Contributors
                Role: ND
                Role: ND
                Role: ND
                Role: ND
                Journal
                rbof
                Revista Brasileira de Oftalmologia
                Rev. bras.oftalmol.
                Sociedade Brasileira de Oftalmologia (Rio de Janeiro )
                1982-8551
                August 2013
                : 72
                : 4
                : 232-236
                Affiliations
                [1 ] Universidade Federal de Minas Gerais Brazil
                [2 ] Fundação Ezequiel Dias Brazil
                Article
                S0034-72802013000400005
                10.1590/S0034-72802013000400005
                7da4aae6-f53a-472f-a3af-3018e221c852

                http://creativecommons.org/licenses/by/4.0/

                History
                Product

                SciELO Brazil

                Self URI (journal page): http://www.scielo.br/scielo.php?script=sci_serial&pid=0034-7280&lng=en
                Categories
                OPHTHALMOLOGY

                Ophthalmology & Optometry
                Keratoconjunctivitis sicca,Cyclosporine,Drug delivery system,Ceratoconjuntivite seca,Ciclosporina,Sistemas de liberação de medicamentos

                Comments

                Comment on this article