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Doctoral Thesis
DOI
https://doi.org/10.11606/T.42.2014.tde-11122014-150038
Document
Author
Full name
Kallene Summer Moreira Vidal
Institute/School/College
Knowledge Area
Date of Defense
Published
São Paulo, 2014
Supervisor
Committee
Britto, Luiz Roberto Giorgetti de (President)
Damico, Francisco Max
Finzi, Simone
Gualtieri, Mirella
Leonelli, Mauro
Title in Portuguese
Proteínas estruturais em retinas humana e murina.
Keywords in Portuguese
Células ganglionares
Neurodegeneração retrógrada
Neurofilamentos
Proteínas associadas ao microtúbulo do tipo 2
Retina humana
Retina murina
Abstract in Portuguese
O objetivo deste estudo foi descrever a distribuição dos neurofilamentos (NFs) e da proteína associada ao microtúbulo do tipo 2 (MAP-2) em retinas humanas e murinas. Para isso, usamos camundongos C57BL/6, submetidos à cirurgia estereotáxica para realização de lesão eletrolítica no colículo superior direito provocando degeneração retrógrada de células ganglionares da retina. Utilizamos ensaios de imunohistoquímica e PCR em tempo real (qPCR) para a caracterização dessas proteínas nas duas espécies. Na retina humana, observou-se que NFs e MAP-2 estão presentes nas células ganglionares do tipo M. No modelo animal, houve diminuição dos NFs e aumento de MAP-2, na análise de imuno-histoquímica. Já o ensaio com qPCR mostrou um aumento e diminuição da expressão dos NFs e MAP-2, respectivamente. Assim, concluímos que houve alterações na expressão do RNAm e na marcação dos NFs e do MAP-2 nas retinas murinas, e esses resultados podem ser extrapolados para os seres humanos, uma vez que essas proteínas estão presentes nas células M que são inicialmente afetadas no glaucoma.
Title in English
Structural proteins in human and murine retina.
Keywords in English
Ganglion cells
Human retina
Murine retina
Neurofilaments
Proteins associated to microtubules type 2
Retrograde neurodegeneration
Abstract in English
This study aimed to describe the distribution of NFs and type 2 protein associated with microtubule (MAP-2) in human retinas of these proteins and evaluate a model of retrograde retinal ganglion cell degeneration in murine retinas. To achieve this, we submitted C57bl/6 to a stereotaxic surgery for superior colliculus electrolytic lesion in the right side. The characterization of these proteins was obtained through immunohistochemical essays and real-time PCR (qPCR). The results revealed that both proteins are present in the ganglion cell M in the human retina. In the experimental animal model the immunohistochemical essays demonstrated decrease of NFs and increased MAP-2. However, the qPCR analysis demonstrated increased NFs and decreased MAP-2 expression. We can conclude that there was variation of mRNA expression and structural protein levels in the experimental retina. And, the results related to NFs and MAP-2 in this animal model can be extrapolated to humans, as these proteins are also present in the human ganglion cell that are affected early in glaucoma.
 
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Publishing Date
2014-12-16
 
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