The use of tetrodotoxin for the characterization of drug-enhanced dopamine release in conscious rats studied by brain dialysis

The effect of TTX (infused during brain dialysis of the striatum and nucleus accumbens) on the in vivo release of dopamine, 3,4-dihydroxyphenylacetic acid and homovanillic acid, was investigated. In addition it was studied whether the increase in the release of dopamine, induced by various pharmacol...

Full description

Saved in:
Bibliographic Details
Published in:Naunyn-Schmiedeberg's archives of pharmacology 1987-11, Vol.336 (5), p.502-507
Main Authors: WESTERINK, B. H. C, TUNTLER, J, DAMSMA, G, ROLLEMA, H, DE VRIES, J. B
Format: Article
Language:English
Subjects:
1-Methyl-4-phenylpyridinium
3,4-Dihydroxyphenylacetic Acid - metabolism
Amphetamine - pharmacology
Animals
Biological and medical sciences
Catecholaminergic system
Corpus Striatum - metabolism
Dialysis
Dopamine - metabolism
Haloperidol - pharmacology
Homovanillic Acid - metabolism
Male
Medical sciences
Morphine - pharmacology
Neuropharmacology
Neurotoxins - pharmacology
Neurotransmitters. Neurotransmission. Receptors
Nucleus Accumbens - metabolism
Pharmacology. Drug treatments
Piperazines - pharmacology
Pyridinium Compounds - pharmacology
Rats
Rats, Inbred Strains
Septal Nuclei - metabolism
Tetrodotoxin - administration & dosage
Tetrodotoxin - pharmacology
Citations: Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The effect of TTX (infused during brain dialysis of the striatum and nucleus accumbens) on the in vivo release of dopamine, 3,4-dihydroxyphenylacetic acid and homovanillic acid, was investigated. In addition it was studied whether the increase in the release of dopamine, induced by various pharmacological treatments, was sensitive to TTX infusion. The following drugs were studied: haloperidol, amphetamine, haloperidol co-administered with GBR 12909, morphine and MPP+. Dialysis was carried out in the striatum, except for morphine, which was studied in the nucleus accumbens. The infusion of TTX revealed three different types of pharmacologically enhanced dopamine release in conscious rats. First, action potential dependent dopamine release (exocytosis), which was observed in untreated animals as well as in animals treated with haloperidol, haloperidol + GBR 12909, and morphine. Second, action potential independent release (carrier-mediated) was established in the case of amphetamine. Third, action potential independent DA release, probably caused by neurotoxic reactions was observed during MPP+ infusion.
ISSN:0028-1298
1432-1912
DOI:10.1007/bf00169306