An improved fluorimetric method for assay of Dopa in urine and tissues and its use for determination of urinary Dopa, at endogenous level, in different species
- 1 June 1977
- journal article
- conference paper
- Published by Springer Nature in Journal Of Neural Transmission-Parkinsons Disease and Dementia Section
- Vol. 41 (2-3) , 145-173
- https://doi.org/10.1007/bf01670279
Abstract
An optimized fluorimetric method is presented which permits the analysis of DOPA in urine or tissues, at endogenous levels. A wide variety of eluates can be analyzed by applying the manual or the automated schedule. The automated manifold, developed for DOPA assay, may be used to estimate norepinephrine (NE) in other samples, by only changing the nature of reagents to be pumped. Amounts of DOPA as low as 0.3 ng/ml of eluate can be detected. Determinations of endogenous DOPA are reported in urinary samples of Humans, Rats, Dogs and Sheeps, and in brain of Rats. The pattern of changes in DOPA urinary excretion has been investigated as a function of time in Rats. Dietary influences have been studied in Man, Rat and Dog. It is concluded that the greatest part of free and conjugated DOPA excreted in urine of these animals has an endogenous origin. Nous avons étudié une méthode fluorimétrique pour doser la DOPA dans les urines et les tissus, à l'état endogène. Une grande variété d'éluats peut être dosée en appliquant la méthode manuelle ou le procédé en flux continu. Le même diagramme en flux continu peut être utilisé pour le dosage de la noradrénaline dans d'autres éluats, avec la seule modification des réactifs pompés. Des concentrations en DOPA aussi faibles que 0,3 ng/ml d'éluat peuvent être dosées. Le dosage a été appliqué aux urines de Rat, de Chien, de Mouton et d'Homme et au cerveau de Rat. Les fluctuations d'excrétion de la DOPA, en fonction du temps, ont été examinées chez le Rat. L'influence de la nature des aliments ingérés a été étudiée chez le Rat, le Chien et l'Homme. Ces résultats montrent que la plus grande partie de la DOPA urinaire peut être rapportée à un métabolisme endogéne.This publication has 42 references indexed in Scilit:
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