Transplante xenogênico de córneas seguido de tratamento com riboflavina e radiação ultravioleta: uma alternativa promissora para doenças da córnea.
| Ano de defesa: | 2025 |
|---|---|
| Autor(a) principal: | |
| Orientador(a): | |
| Banca de defesa: | |
| Tipo de documento: | Dissertação |
| Tipo de acesso: | Acesso aberto |
| Idioma: | por |
| Instituição de defesa: |
Universidade Federal de Minas Gerais
|
| Programa de Pós-Graduação: |
Não Informado pela instituição
|
| Departamento: |
Não Informado pela instituição
|
| País: |
Não Informado pela instituição
|
| Link de acesso: | https://hdl.handle.net/1843/84081 |
Resumo: | Keratoconus is a disease that affects the human cornea, and in severe cases, corneal transplantation is the only solution to restore vision. However, the scarcity of available corneas limits this type of treatment. Porcine cornea has emerged as an alternative due to its easy availability and low rejection rate. Following xenograft transplantation, approaches to promote collagen cross-linking in the implanted tissue have been tested. The aim of this study was to evaluate the application of riboflavin and UV radiation on decellularized lenticules implanted in rabbits through keratoplasty. The results showed that intrastromal implantation was successful, with riboflavin and UV radiation treatment yielding superior outcomes compared to implantation without these treatments. Microscopic analyses indicated that the tissue was well-adhered to, with collagen fibrils organized at the periphery and no signs of edema in the riboflavin and UV radiation-treated group. Therefore, it is concluded that the use of riboflavin and UV radiation immediately after transplantation is a promising alternative to promote corneal cross-linking. |
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2025-08-05T18:50:42Z2025-09-08T23:24:27Z2025-08-05T18:50:42Z2025-02-24https://hdl.handle.net/1843/84081Keratoconus is a disease that affects the human cornea, and in severe cases, corneal transplantation is the only solution to restore vision. However, the scarcity of available corneas limits this type of treatment. Porcine cornea has emerged as an alternative due to its easy availability and low rejection rate. Following xenograft transplantation, approaches to promote collagen cross-linking in the implanted tissue have been tested. The aim of this study was to evaluate the application of riboflavin and UV radiation on decellularized lenticules implanted in rabbits through keratoplasty. The results showed that intrastromal implantation was successful, with riboflavin and UV radiation treatment yielding superior outcomes compared to implantation without these treatments. Microscopic analyses indicated that the tissue was well-adhered to, with collagen fibrils organized at the periphery and no signs of edema in the riboflavin and UV radiation-treated group. Therefore, it is concluded that the use of riboflavin and UV radiation immediately after transplantation is a promising alternative to promote corneal cross-linking.CNPq - Conselho Nacional de Desenvolvimento Científico e TecnológicoporUniversidade Federal de Minas Geraishttp://creativecommons.org/licenses/by-nc-nd/3.0/pt/info:eu-repo/semantics/openAccessCórneaLentículoCross-linkingRiboflavinaUltravioletaXenotransplanteTransplante xenogênico de córneas seguido de tratamento com riboflavina e radiação ultravioleta: uma alternativa promissora para doenças da córnea.Xenographic lenticule implantation followed by riboflavin and UV treatment: a promising alternative for corneal ectasias management.info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesisFernanda Aparecida Silva Vieirareponame:Repositório Institucional da UFMGinstname:Universidade Federal de Minas Gerais (UFMG)instacron:UFMGhttp://lattes.cnpq.br/2772658014919517Armando da Silva Cunha Júniorhttp://lattes.cnpq.br/8278273904187275Lays Fernanda Nunes DouradoAdriana Oliveira CostaCaryne Margotto BertolloO ceratocone é uma doença que compromete a córnea humana, e em casos graves, o transplante de córnea é a única solução para restaurar a visão. Contudo, a escassez de córneas disponíveis limita esse tipo de tratamento. A córnea de porco tem se destacado como uma alternativa devido à sua fácil disponibilidade e baixa taxa de rejeição. Após o transplante xenogênico, abordagens para promover o cross-linking (reticulação das fibras de colágeno) do colágeno no tecido implantado têm sido testadas. O objetivo deste estudo foi avaliar a aplicação de riboflavina e radiação UV em lentículos descelularizados implantados em coelhos por ceratoplastia. Os resultados mostraram que a implantação intraestromal foi bem- sucedida, com a aplicação de riboflavina e radiação UV resultando em resultados superiores em relação à implantação sem esses tratamentos. As análises microscópicas indicaram que o tecido estava bem aderido, com fibrilas de colágeno organizadas na periferia e sem sinais de edema no grupo tratado com riboflavina e radiação UV. Conclui-se, portanto, que o uso de riboflavina e radiação UV imediatamente após o transplante é uma alternativa promissora para promover o cross-linking corneal.https://orcid.org/my-orcid?orcid=0009-0001-1289-5812BrasilFARMACIA - FACULDADE DE FARMACIAPrograma de Pós-Graduação em Ciências FarmacêuticasUFMGLICENSElicense.txttext/plain2118https://repositorio.ufmg.br//bitstreams/20a1d8f8-3353-46fb-9d5a-3a3a97df7c81/downloadcda590c95a0b51b4d15f60c9642ca272MD51falseAnonymousREADCC-LICENSElicense_rdfapplication/octet-stream811https://repositorio.ufmg.br//bitstreams/cf55af4c-b727-4bfe-9808-6274884dcb98/downloadcfd6801dba008cb6adbd9838b81582abMD52falseAnonymousREADORIGINALTRANSPLANTE XENOGÊNICO DE CÓRNEAS SEGUIDO DE TRATAMENTO COM RIBOFLAVINA E RADIAÇÃO ULTRAVIOLETA. Uma alternativa promissora para doenças da córnea.pdfA.pdfapplication/pdf4650602https://repositorio.ufmg.br//bitstreams/8624886d-a0e9-4993-9977-3e698ec58a12/downloade943c53a8ffa7caed22ba435daf2279cMD53trueAnonymousREAD1843/840812025-09-08 20:24:27.789http://creativecommons.org/licenses/by-nc-nd/3.0/pt/Acesso Abertoopen.accessoai:repositorio.ufmg.br:1843/84081https://repositorio.ufmg.br/Repositório InstitucionalPUBhttps://repositorio.ufmg.br/oairepositorio@ufmg.bropendoar:2025-09-08T23:24:27Repositório Institucional da UFMG - Universidade Federal de Minas Gerais (UFMG)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 |
| dc.title.none.fl_str_mv |
Transplante xenogênico de córneas seguido de tratamento com riboflavina e radiação ultravioleta: uma alternativa promissora para doenças da córnea. |
| dc.title.alternative.none.fl_str_mv |
Xenographic lenticule implantation followed by riboflavin and UV treatment: a promising alternative for corneal ectasias management. |
| title |
Transplante xenogênico de córneas seguido de tratamento com riboflavina e radiação ultravioleta: uma alternativa promissora para doenças da córnea. |
| spellingShingle |
Transplante xenogênico de córneas seguido de tratamento com riboflavina e radiação ultravioleta: uma alternativa promissora para doenças da córnea. Fernanda Aparecida Silva Vieira Córnea Lentículo Cross-linking Riboflavina Ultravioleta Xenotransplante |
| title_short |
Transplante xenogênico de córneas seguido de tratamento com riboflavina e radiação ultravioleta: uma alternativa promissora para doenças da córnea. |
| title_full |
Transplante xenogênico de córneas seguido de tratamento com riboflavina e radiação ultravioleta: uma alternativa promissora para doenças da córnea. |
| title_fullStr |
Transplante xenogênico de córneas seguido de tratamento com riboflavina e radiação ultravioleta: uma alternativa promissora para doenças da córnea. |
| title_full_unstemmed |
Transplante xenogênico de córneas seguido de tratamento com riboflavina e radiação ultravioleta: uma alternativa promissora para doenças da córnea. |
| title_sort |
Transplante xenogênico de córneas seguido de tratamento com riboflavina e radiação ultravioleta: uma alternativa promissora para doenças da córnea. |
| author |
Fernanda Aparecida Silva Vieira |
| author_facet |
Fernanda Aparecida Silva Vieira |
| author_role |
author |
| dc.contributor.author.fl_str_mv |
Fernanda Aparecida Silva Vieira |
| dc.subject.other.none.fl_str_mv |
Córnea Lentículo Cross-linking Riboflavina Ultravioleta Xenotransplante |
| topic |
Córnea Lentículo Cross-linking Riboflavina Ultravioleta Xenotransplante |
| description |
Keratoconus is a disease that affects the human cornea, and in severe cases, corneal transplantation is the only solution to restore vision. However, the scarcity of available corneas limits this type of treatment. Porcine cornea has emerged as an alternative due to its easy availability and low rejection rate. Following xenograft transplantation, approaches to promote collagen cross-linking in the implanted tissue have been tested. The aim of this study was to evaluate the application of riboflavin and UV radiation on decellularized lenticules implanted in rabbits through keratoplasty. The results showed that intrastromal implantation was successful, with riboflavin and UV radiation treatment yielding superior outcomes compared to implantation without these treatments. Microscopic analyses indicated that the tissue was well-adhered to, with collagen fibrils organized at the periphery and no signs of edema in the riboflavin and UV radiation-treated group. Therefore, it is concluded that the use of riboflavin and UV radiation immediately after transplantation is a promising alternative to promote corneal cross-linking. |
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2025 |
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2025-08-05T18:50:42Z 2025-09-08T23:24:27Z |
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2025-08-05T18:50:42Z |
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2025-02-24 |
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info:eu-repo/semantics/publishedVersion |
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info:eu-repo/semantics/masterThesis |
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por |
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Universidade Federal de Minas Gerais |
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Universidade Federal de Minas Gerais |
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