UNLABELLED: Backgound: Chitosan/polyvinyl alcohol corneal cap has good biocompatibility and drug slow release characteristics, which provided new treatment method for anterior segment disease. Our study was to evaluate biocompatibility of poly (vinyl alcohol)/chitosan corneal shield's intraocular and investigate its feasibility to treat ocular surface disorders. METHODS: Thirty-six white rabbits were randomly divided into four groups. Slit lamp observation were conducted at 1, 3, 7 and 10 days after operation. Corneal and conjunctiva tissue harvested from the experimental groups was observed by HE staining 10 days after operation. The aqueous humor was aspirated from the anterior chamber at each designated time point (1, 3, 7 and 10 days). The cornea and conjunctive were collected at 10 days. The concentration of each tissue was analyzed by ultra-performance liquid chromatography and microscope observation. RESULTS: In all groups, mild hyperemia was observed 1 day after operation, and there was no obvious inflammatory reaction occurring on the seventh and tenth day. No corneal edema and inflammatory reaction of anterior chamber occurred till the tenth day. For histopathology, there was no obviously mild chronic and inflammatory reaction occurred, and no significant difference between the corneal shield with-in groups and with-out groups. The drug concentrations in corneal and conjunctival in group (A, B) were significantly lower than eye drops in the control group (C, D), and blank corneal cover in group C was significantly sham operation in group D. CONCLUSION: The results indicated that the proposed membrane combined with ophthalmic solution has substantial potential as ocular delivery system.
UNLABELLED: Backgound: Chitosan/polyvinyl alcoholcorneal cap has good biocompatibility and drug slow release characteristics, which provided new treatment method for anterior segment disease. Our study was to evaluate biocompatibility of poly (vinyl alcohol)/chitosancorneal shield's intraocular and investigate its feasibility to treat ocular surface disorders. METHODS: Thirty-six white rabbits were randomly divided into four groups. Slit lamp observation were conducted at 1, 3, 7 and 10 days after operation. Corneal and conjunctiva tissue harvested from the experimental groups was observed by HE staining 10 days after operation. The aqueous humor was aspirated from the anterior chamber at each designated time point (1, 3, 7 and 10 days). The cornea and conjunctive were collected at 10 days. The concentration of each tissue was analyzed by ultra-performance liquid chromatography and microscope observation. RESULTS: In all groups, mild hyperemia was observed 1 day after operation, and there was no obvious inflammatory reaction occurring on the seventh and tenth day. No corneal edema and inflammatory reaction of anterior chamber occurred till the tenth day. For histopathology, there was no obviously mild chronic and inflammatory reaction occurred, and no significant difference between the corneal shield with-in groups and with-out groups. The drug concentrations in corneal and conjunctival in group (A, B) were significantly lower than eye drops in the control group (C, D), and blank corneal cover in group C was significantly sham operation in group D. CONCLUSION: The results indicated that the proposed membrane combined with ophthalmic solution has substantial potential as ocular delivery system.
Authors: Laura Contreras-Ruiz; María de la Fuente; Carmen García-Vázquez; Victoria Sáez; Begoña Seijo; María J Alonso; Margarita Calonge; Yolanda Diebold Journal: Cornea Date: 2010-05 Impact factor: 2.651
Authors: Viviane M Bispo; Alexandra A P Mansur; Edel F Barbosa-Stancioli; Herman S Mansur Journal: J Biomed Nanotechnol Date: 2010-04 Impact factor: 4.099
Authors: Seenu M Hariprasad; William E Mieler; Gaurav K Shah; Kevin J Blinder; Rajendra S Apte; Nancy M Holekamp; Matthew A Thomas; Jingduan Chi; Randall A Prince Journal: Trans Am Ophthalmol Soc Date: 2004