Eletroforese em papel das proteínas do líquido cefalorraqueano e seu valor prático em clínica neurológica

Eletroforese em papel das proteínas do líquido cefalorraqueano e seu valor prático em clínica neurológica

Alternative title Paper-strip electrophoresis of cerebrospinal fluid proteins and their practical value in Neurology
Author Reis, João Baptista Dos Autor UNIFESP Google Scholar
Bei, Antonio Autor UNIFESP Google Scholar
Reis Filho, Isnard Dos Autor UNIFESP Google Scholar
Institution Universidade Federal de São Paulo (UNIFESP)
Abstract This paper is based on the study of the protein profile of the cerebrospinal fluid of 300 neurological patients. This material was analysed in the same way as that one performed by Matiar and Schmidt (1958) and it was found almost the same results. These findings suggested the great value of the cerebrospinal fluid gamma-globulin concentration in the neurological differential diagnosis. In order to enlarge these studies in our own material, it was tried to find some correlation between albumin and globulin fractions expressed in mg/100 ml. The logarithm of albumin concentration was plotted graphically against the logarithm of globulin concentration; each disease was noted down as different symbols. It was verified linear bilogarithmic correlation between albumin and each globulin fraction. Graphs with albumin/alpha-globulin or with albumin/beta-globulin showed absence of characteristic disease behaviour. On the contrary, the graph with albumin/gamma-globulin showed a typical behaviour for neurolues and brain cysticercosis data. Assuming that the cases of spinal block may very well indicate the condition where the changes of the spinal fluid proteins were due to a modification of permeability of the blood-brain barrier, it was calculated the regression equation for the various gamma-globulin concentrations of these cases. It was found that most of the cases of brain tumors, intracranial hemorrhages, meningitis and polyradiculoneuritis were in perfect agreement with the cases of spinal block, suggesting that in these cases the protein changes were due to a modification of permeability of the blood-brain barrier. On the contrary, the great majority of the cases of neurolues and brain cysticercosis did not follow this pattern, suggesting that there was an increase of the spinal fluid gamma-globulin which must be originated intrathecally. These findings point out to two different mechanisms in the changes of the protein profile of cerebrospinal fluid and, therefore, electrophoresis did not allow the diagnosis of a determined neurological disorder, but it shows the particular physiopathological mechanism involved.

O presente trabalho é baseado no estudo dos perfis eletroforéticos das proteínas do líquido cefalorraqueano de 300 pacientes normais ou portadores de diversas entidades neurológicas. Analisando êste material, os autores verificaram que a gama-globulina é a fração protêica cuja variação tem grande importância na prática neurológica para o diagnóstico diferencial. A principal conclusão a que chegaram indica que há dois diferentes mecanismos que atuam na alteração do perfil eletroforético das proteínas do líquor: a) alteração da permeabilidade da barreira hêmato-encefálica; b) liberação intratecal de gama-globulina. Portanto, o método eletroforético não permite o diagnóstico de determinada entidade neurológica, mas indica o mecanismo fisiopatológico em atividade.
Language Portuguese
Date 1964-03-01
Published in Arquivos de Neuro-Psiquiatria. Academia Brasileira de Neurologia - ABNEURO, v. 22, n. 1, p. 55-60, 1964.
ISSN 0004-282X (Sherpa/Romeo)
Publisher Academia Brasileira de Neurologia - ABNEURO
Extent 55-60
Origin http://dx.doi.org/10.1590/S0004-282X1964000100006
Access rights Open access Open Access
Type Article
SciELO ID S0004-282X1964000100006 (statistics in SciELO)
URI http://repositorio.unifesp.br/handle/11600/131

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