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- W2943366730 abstract "Huntington's disease (HD) is a rare, autosomal neurodegenerative disease characterized by motor and cognitive impairments appearing in adults. The R6/1 mouse model of the disease recapitulates the adult onset of motor symptoms preceded by cognitive and affective deficits. The monoaminergic systems participate in the establishment of motor and cognitive loops and we postulated that their organization and interaction could be precociously altered. Using tissue measurement of dopamine (DA), serotonin (5-HT), noradrenaline, and some metabolites, we observed that DA and/or its metabolite 3,4-dihydroxyphenylacetic acid (DOPAC), but not 5-HT or noradrenaline tissue content was reduced in an age-dependent manner (from two to six months) in the striatum, substantia nigra and globus pallidus of R6/1 mice. The metabolite of 5-HT was also lower in R6/1 mice, mainly in the substantia nigra and hippocampus. We then addressed early disorganization of monoaminergic systems in 18 brain regions encompassing several neurobiological networks in 35 day-old animals. DA tissue content was not altered in the striatum or substantia nigra but was decreased in the nucleus accumbens and increased in the globus pallidus. The correlations of monoaminergic index in-between the 18 selected brain regions revealed distinct organizations of monoamines in R6/1 mice, notably marked by a loss of the number of correlations of the DOPAC/DA ratio. The neurochemical analyses show that each monoaminergic system is distinctly altered in the R6/1 mouse model. The early abnormal organization of these systems likely points out altered maturation of neurobiological networks at early stages of HD." @default.
- W2943366730 created "2019-05-09" @default.
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- W2943366730 date "2019-09-01" @default.
- W2943366730 modified "2023-10-06" @default.
- W2943366730 title "Early neurochemical modifications of monoaminergic systems in the R6/1 mouse model of Huntington's disease" @default.
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- W2943366730 doi "https://doi.org/10.1016/j.neuint.2019.05.001" @default.
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