Vitreshchak TV, Poleshchuk VV, Piradov MA  Biomed Khim  2004 Jan-Feb;50(1):92-9

Institute of Neurology, Russian Academy of Medical Sciences, Volokolamskoe Shosse 80, 125367 Moscow, Russia. Content of neurotransmitter amino acids before and after treatment with He-Ne-laser was measured in blood of two groups of the Parkinson’s disease patients distinguished by low (first group) and high (second group) activity of monoamine oxidase B and Cu/Zn-superoxide dismutase. An increase in taurine level at the early stage of the disease (first group of patients) suggests that taurine may be a marker of compensatory abilities of the organism. The violation of the glutamate/taurine balance at the later stages of the disease and its normalization following the laserotherapy accompanied improvement of neurological symptoms.Engelborghs S, Marescau B, De Deyn PP. Amino acids and biogenic amines in cerebrospinal fluid of patients with Parkinson’s disease. Neurochem Res. 2003 Aug;28(8):1145-50. Department of Neurology, Laboratory of Neurochemistry and Behavior, Born-Bunge Foundation, University of Antwerp, Belgium. To study changes in amino acid metabolism and biogenic amines in Parkinson’s disease, we set up a prospective study and measured biogenic amines, their main metabolites, and 22 different amino acids, in cerebrospinal fluid of Parkinson’s disease patients (n = 24) and age-matched controls (n = 30). A trend toward higher dopamine levels in Parkinson’s disease patients was interpreted as an effect of treatment with levodopa and/or selegiline. Significantly lower concentrations of the dopamine metabolite 3,4-dihydroxyphenylacetic acid in the Parkinson’s disease group might reflect dopaminergic cell loss. Our results revealed decreased serotonin catabolism that was interpreted as an effect of treatment with selegiline. Whereas all amino acid levels were unchanged, taurine was significantly lower in Parkinson’s disease patients. Studies showed that taurine exerts a trophic action on the central nervous system. In this view, decreased taurine in a neurodegenerative disorder as Parkinson’s disease deserves attention.

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