5-Hydroxytryptamine level in the brain of rats after simultaneous lesion of the central dopaminergic and noradrenergic system
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Katedra i Zakład Farmakologii w Zabrzu SUM w Katowicach
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Przemysław Nowak   

Katedra i Zakład Farmakologii SUM, 41-808 Zabrze, ul. H. Jordana 38; tel./fax 32 272 26 83
Ann. Acad. Med. Siles. 2009;63:39-45
Rats lesioned shortly after birth with 6-OHDA (neurotoxin for the central dopaminergic system) have been proposed to be a near-ideal model of severe Parkinson’s disease, because of non-lethality of the procedure, near-total destruction of nigrostriatal dopaminergic fi bres and near-total dopamine (DA) denervation of striatum. In such rodent model of Parkinson’s disease increase of serotoninergic system in the brain of adult rats was observed. The aim of presented study was to examine the central serotoninergic system in adult rats simultaneously lesioned with central dopaminergic (using 6-OHDA) and noradrenergic system (using DSP-4).

Material and Methods:
Newborn male Wistar rats were injected on the day 1st and 3rd of life with DSP-4 (neurotoxin for noradrenergic system) 50.0 mg/kg SC, and on the day 3rd with 6-OHDA 134 μg ICV. Separately and concomitantly. In adult animals the level of biogenic amines in the brain was estimated by HPLC/ED technique.

It was shown that in rats lesioned as neonates with 6-OHDA increase of 5-HT and its metabolite 5-HIAA was observed in the brain of adult rats. Simultaneous lesion of the central dopaminergic and noradrenergic system induce further increase in the level of indole amines in the brain of adult rats.

Simultaneous lesion of the central dopaminergic and noradrenergic system of rats as neonates increased activity of the central serotoninergic system which seems to be a substitute of the dopaminergic one.

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