Efeitos do ácido ascórbico intracameral sobre o endotélio corneal e sobre o fator de necrose tumoral alfa (TNF-a) em cães submetidos à facoemulsificação

Detalhes bibliográficos
Autor(a) principal: Martinez Pádua, Ivan Ricardo [UNESP]
Data de Publicação: 2015
Tipo de documento: Tese
Idioma: por
Título da fonte: Repositório Institucional da UNESP
Texto Completo: http://hdl.handle.net/11449/126389
http://www.athena.biblioteca.unesp.br/exlibris/bd/cathedra/12-08-2015/000835480.pdf
Resumo: Cataract is among the most common eye diseases in dogs. Phacoemulsification is the method that best fits to therapy and a favorite among veterinary ophthalmologists. The cellularity of the corneal endothelium is considered to be a condition for the success of the surgery, since a permanent endothelial injury can induce corneal decompensation. The goal of this study was to evaluate the antioxidant effects of ascorbic acid on the corneal endothelium, as well as the expression of the tumor necrosis factor alpha (TNF-α) in the aqueous humor was evaluated of dogs submitted to phacoemulsification. It was used 40 eyes of 20 dogs, male or female, with 7 to 12 years, and bilateral senile cataracts. The dogs were separated into two groups (n = 20), differing only in the composition of the solution used to irrigate the eyes in the phacoemulsification. Group 1 (G1) received balanced salt solution (BSS) and Group 2 (G2) received sterile BSS containing 0.001 M ascorbic acid. The corneal endothelium was evaluated by non-contact specular microscopy before and at different times after phacoemulsification, in terms of cell density (cells/mm2), cell area (mm2), corneal thickness (mm), hexagonality, and coefficient of variation in cell size. The expression of TNF-α in the aqueous humor was measured by competitive enzyme immunoassay. P values equal to or less than 0.05 were considered significant. Regarding the density of endothelial cells, both groups showed losses, but these were lower in G2. There were no significant differences in corneal thickness (P>0.05). The hexagonality significantly reduced in the immediate postoperative of G1. Also in G1, the coefficient of variation in cell size increased. TNF-α expression was not observed in the aqueous humor in G1 and G2. According to the results, it can be assumed that ascorbic acid was able to minimize losses in endothelial cellularity arising from phacoemulsification
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spelling Efeitos do ácido ascórbico intracameral sobre o endotélio corneal e sobre o fator de necrose tumoral alfa (TNF-a) em cães submetidos à facoemulsificaçãoCãoCatarataFaco-emulsificaçãoEndotelioCorneaFator de necrose de tumorCataractCataract is among the most common eye diseases in dogs. Phacoemulsification is the method that best fits to therapy and a favorite among veterinary ophthalmologists. The cellularity of the corneal endothelium is considered to be a condition for the success of the surgery, since a permanent endothelial injury can induce corneal decompensation. The goal of this study was to evaluate the antioxidant effects of ascorbic acid on the corneal endothelium, as well as the expression of the tumor necrosis factor alpha (TNF-α) in the aqueous humor was evaluated of dogs submitted to phacoemulsification. It was used 40 eyes of 20 dogs, male or female, with 7 to 12 years, and bilateral senile cataracts. The dogs were separated into two groups (n = 20), differing only in the composition of the solution used to irrigate the eyes in the phacoemulsification. Group 1 (G1) received balanced salt solution (BSS) and Group 2 (G2) received sterile BSS containing 0.001 M ascorbic acid. The corneal endothelium was evaluated by non-contact specular microscopy before and at different times after phacoemulsification, in terms of cell density (cells/mm2), cell area (mm2), corneal thickness (mm), hexagonality, and coefficient of variation in cell size. The expression of TNF-α in the aqueous humor was measured by competitive enzyme immunoassay. P values equal to or less than 0.05 were considered significant. Regarding the density of endothelial cells, both groups showed losses, but these were lower in G2. There were no significant differences in corneal thickness (P>0.05). The hexagonality significantly reduced in the immediate postoperative of G1. Also in G1, the coefficient of variation in cell size increased. TNF-α expression was not observed in the aqueous humor in G1 and G2. According to the results, it can be assumed that ascorbic acid was able to minimize losses in endothelial cellularity arising from phacoemulsificationA catarata situa-se entre as afecções oculares mais frequentes em cães. A facoemulsificação é o método que melhor se adéqua à terapia e o preferido entre os oftalmologistas. A celularidade do endotélio é condição a ser considerada para o sucesso da cirurgia, uma vez que lesões endoteliais podem induzir descompensação corneal permanente. Avaliou-se o papel antioxidante do ácido ascórbico intracameral sobre o endotélio corneal e sobre o fator de necrose tumoral alfa (TNF-α) expresso no humor aquoso, em cães submetidos à facoemulsificação. Utilizaram-se 40 olhos de 20 pacientes, machos ou fêmeas, com 7 a 12 anos, portando catarata senil bilateral. Conceberam-se dois grupos (n=20). Grupo 1 (G1), recebeu solução salina balanceada (BSS); Grupo 2 (G2), recebeu 0,001M de ácido ascórbico estéril diluído em BSS. O endotélio corneal foi avaliado à microscopia especular de não contato, antes e em diferentes momentos após a facoemulsificação. Avaliaram-se a densidade (células/mm2) e a área (mm2) celular, a espessura corneal (mm), a hexagonalidade e o coeficiente de variação do tamanho celular. O humor aquoso foi avaliado quanto à expressão do fator de necrose tumoral alfa (TNF-α). Valores de p iguais ou inferiores a 0,05 foram considerados significativos. Com relação à densidade de células endoteliais, ambos os grupos apresentaram perdas, porém essas foram menores no G2. Relativamente à espessura corneal, não houve diferença. A hexagonalidade diminuiu significativamente no pós-operatório imediato no G1. Ainda no G1, o coeficiente de variação do tamanho celular aumentou significativamente. Não se encontrou reação marcada do TNF-α em ambos os grupos. De consoante com os resultados obtidos, admiti-se que o ácido ascórbico contribuiu para se minimizarem perdas celulares, relativamente ao endotélio corneal na facoemulsificaçãoUniversidade Estadual Paulista (Unesp)Laus, José Luiz [UNESP]Universidade Estadual Paulista (Unesp)Martinez Pádua, Ivan Ricardo [UNESP]2015-08-20T17:09:40Z2015-08-20T17:09:40Z2015-02-10info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/doctoralThesisix, 51 p. : il.application/pdfMARTINEZ PÁDUA, Ivan Ricardo. Efeitos do ácido ascórbico intracameral sobre o endotélio corneal e sobre o fator de necrose tumoral alfa (TNF-a) em cães submetidos à facoemulsificação. 2015. ix, 51 p. Tese (doutorado) - Universidade Estadual Paulista Júlio de Mesquita Filho, Faculdade de Ciências Agrárias e Veterinárias de Jaboticabal, 2015.http://hdl.handle.net/11449/126389000835480http://www.athena.biblioteca.unesp.br/exlibris/bd/cathedra/12-08-2015/000835480.pdf33004102069P8Alephreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPporinfo:eu-repo/semantics/openAccess2024-06-05T18:00:52Zoai:repositorio.unesp.br:11449/126389Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T14:10:11.911361Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false
dc.title.none.fl_str_mv Efeitos do ácido ascórbico intracameral sobre o endotélio corneal e sobre o fator de necrose tumoral alfa (TNF-a) em cães submetidos à facoemulsificação
title Efeitos do ácido ascórbico intracameral sobre o endotélio corneal e sobre o fator de necrose tumoral alfa (TNF-a) em cães submetidos à facoemulsificação
spellingShingle Efeitos do ácido ascórbico intracameral sobre o endotélio corneal e sobre o fator de necrose tumoral alfa (TNF-a) em cães submetidos à facoemulsificação
Martinez Pádua, Ivan Ricardo [UNESP]
Cão
Catarata
Faco-emulsificação
Endotelio
Cornea
Fator de necrose de tumor
Cataract
title_short Efeitos do ácido ascórbico intracameral sobre o endotélio corneal e sobre o fator de necrose tumoral alfa (TNF-a) em cães submetidos à facoemulsificação
title_full Efeitos do ácido ascórbico intracameral sobre o endotélio corneal e sobre o fator de necrose tumoral alfa (TNF-a) em cães submetidos à facoemulsificação
title_fullStr Efeitos do ácido ascórbico intracameral sobre o endotélio corneal e sobre o fator de necrose tumoral alfa (TNF-a) em cães submetidos à facoemulsificação
title_full_unstemmed Efeitos do ácido ascórbico intracameral sobre o endotélio corneal e sobre o fator de necrose tumoral alfa (TNF-a) em cães submetidos à facoemulsificação
title_sort Efeitos do ácido ascórbico intracameral sobre o endotélio corneal e sobre o fator de necrose tumoral alfa (TNF-a) em cães submetidos à facoemulsificação
author Martinez Pádua, Ivan Ricardo [UNESP]
author_facet Martinez Pádua, Ivan Ricardo [UNESP]
author_role author
dc.contributor.none.fl_str_mv Laus, José Luiz [UNESP]
Universidade Estadual Paulista (Unesp)
dc.contributor.author.fl_str_mv Martinez Pádua, Ivan Ricardo [UNESP]
dc.subject.por.fl_str_mv Cão
Catarata
Faco-emulsificação
Endotelio
Cornea
Fator de necrose de tumor
Cataract
topic Cão
Catarata
Faco-emulsificação
Endotelio
Cornea
Fator de necrose de tumor
Cataract
description Cataract is among the most common eye diseases in dogs. Phacoemulsification is the method that best fits to therapy and a favorite among veterinary ophthalmologists. The cellularity of the corneal endothelium is considered to be a condition for the success of the surgery, since a permanent endothelial injury can induce corneal decompensation. The goal of this study was to evaluate the antioxidant effects of ascorbic acid on the corneal endothelium, as well as the expression of the tumor necrosis factor alpha (TNF-α) in the aqueous humor was evaluated of dogs submitted to phacoemulsification. It was used 40 eyes of 20 dogs, male or female, with 7 to 12 years, and bilateral senile cataracts. The dogs were separated into two groups (n = 20), differing only in the composition of the solution used to irrigate the eyes in the phacoemulsification. Group 1 (G1) received balanced salt solution (BSS) and Group 2 (G2) received sterile BSS containing 0.001 M ascorbic acid. The corneal endothelium was evaluated by non-contact specular microscopy before and at different times after phacoemulsification, in terms of cell density (cells/mm2), cell area (mm2), corneal thickness (mm), hexagonality, and coefficient of variation in cell size. The expression of TNF-α in the aqueous humor was measured by competitive enzyme immunoassay. P values equal to or less than 0.05 were considered significant. Regarding the density of endothelial cells, both groups showed losses, but these were lower in G2. There were no significant differences in corneal thickness (P>0.05). The hexagonality significantly reduced in the immediate postoperative of G1. Also in G1, the coefficient of variation in cell size increased. TNF-α expression was not observed in the aqueous humor in G1 and G2. According to the results, it can be assumed that ascorbic acid was able to minimize losses in endothelial cellularity arising from phacoemulsification
publishDate 2015
dc.date.none.fl_str_mv 2015-08-20T17:09:40Z
2015-08-20T17:09:40Z
2015-02-10
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/doctoralThesis
format doctoralThesis
status_str publishedVersion
dc.identifier.uri.fl_str_mv MARTINEZ PÁDUA, Ivan Ricardo. Efeitos do ácido ascórbico intracameral sobre o endotélio corneal e sobre o fator de necrose tumoral alfa (TNF-a) em cães submetidos à facoemulsificação. 2015. ix, 51 p. Tese (doutorado) - Universidade Estadual Paulista Júlio de Mesquita Filho, Faculdade de Ciências Agrárias e Veterinárias de Jaboticabal, 2015.
http://hdl.handle.net/11449/126389
000835480
http://www.athena.biblioteca.unesp.br/exlibris/bd/cathedra/12-08-2015/000835480.pdf
33004102069P8
identifier_str_mv MARTINEZ PÁDUA, Ivan Ricardo. Efeitos do ácido ascórbico intracameral sobre o endotélio corneal e sobre o fator de necrose tumoral alfa (TNF-a) em cães submetidos à facoemulsificação. 2015. ix, 51 p. Tese (doutorado) - Universidade Estadual Paulista Júlio de Mesquita Filho, Faculdade de Ciências Agrárias e Veterinárias de Jaboticabal, 2015.
000835480
33004102069P8
url http://hdl.handle.net/11449/126389
http://www.athena.biblioteca.unesp.br/exlibris/bd/cathedra/12-08-2015/000835480.pdf
dc.language.iso.fl_str_mv por
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dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
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dc.format.none.fl_str_mv ix, 51 p. : il.
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dc.publisher.none.fl_str_mv Universidade Estadual Paulista (Unesp)
publisher.none.fl_str_mv Universidade Estadual Paulista (Unesp)
dc.source.none.fl_str_mv Aleph
reponame:Repositório Institucional da UNESP
instname:Universidade Estadual Paulista (UNESP)
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instname_str Universidade Estadual Paulista (UNESP)
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