Light and Transmission Electronic Microscopy Evaluation of Lyophilized Corneas

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dc.contributor.authorFarias, Roberta Jansen de Mello [UNIFESP]
dc.contributor.authorSousa, Luciene Barbosa de [UNIFESP]
dc.contributor.authorLima Filho, Acácio Alves de Souza [UNIFESP]
dc.contributor.authorLourenço, Andréia Cristina dos Santos [UNIFESP]
dc.contributor.authorTanakai, Marcia H.
dc.contributor.authorFreymüller-Haapalainen, Edna [UNIFESP]
dc.contributor.institutionUniversidade Federal de São Paulo (UNIFESP)
dc.contributor.institutionSorocaba Eye Bank
dc.date.accessioned2018-06-15T17:05:09Z
dc.date.available2018-06-15T17:05:09Z
dc.date.issued2008-08-01
dc.description.abstractPurpose: Cornea storage for longer periods is still a challenge for corneal Surgeons. The purpose of this study was to find a method to lyophilize corneas for anterior lamellar transplant and to evaluate. them by light and transmission electronic microscopy.Methods: Corneal flaps were created by using a microkeratome. Corneas were lyophilized with a cryoprotectant (2.3 mol sacarousis for 40 minutes) and without a cryoprotectant in a lyophilization machine (Modulyon D). The corneas were rehydrated with distilled water, balanced saline solution (BSS), and phosphate-buffered saline, after which they were evaluated by microscopy. A cornea that did not undergo lyophilization served as a control.Results: Lyophilization without a cryoprotectant did not preserve the corneal structure. This finding was also observed when lyophilizing and rehydrating the corneas with distilled water or phosphate-buffered saline. We found that lyophilizing corneas and rehydrating them with 11 mL of BSS for 30 minutes preserved the general corneal structure, the parallelism of the collagen fibers, the Bowman layer, and the epithelial basement membrane for 15 and 30 days and for as long as 1 year or more.Conclusions: Lyophilization with sacarousis and rehydration with BSS may be a good method for anterior lamellar transplantation.en
dc.description.affiliationUniv Fed Sao Paulo, Sao Paulo, Brazil
dc.description.affiliationSorocaba Eye Bank, Sorocaba, Brazil
dc.description.affiliationUnifespUniv Fed Sao Paulo, Sao Paulo, Brazil
dc.description.sourceWeb of Science
dc.format.extent791-794
dc.identifierhttps://dx.doi.org/10.1097/ICO.0b013e31816ed54c
dc.identifier.citationCornea. Philadelphia: Lippincott Williams & Wilkins, v. 27, n. 7, p. 791-794, 2008.
dc.identifier.doi10.1097/ICO.0b013e31816ed54c
dc.identifier.issn0277-3740
dc.identifier.urihttp://repositorio.unifesp.br/handle/11600/43423
dc.identifier.wosWOS:000260055700009
dc.language.isoeng
dc.publisherLippincott Williams & Wilkins
dc.relation.ispartofCornea
dc.rightsinfo:eu-repo/semantics/restrictedAccess
dc.subjectlyophilizationen
dc.subjectcryopreservationen
dc.subjectcorneal storageen
dc.titleLight and Transmission Electronic Microscopy Evaluation of Lyophilized Corneasen
dc.typeinfo:eu-repo/semantics/article
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