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Behavioral concomitants of regional changes in the brain's biogenic amines after apomorphine and amphetamine.
Pharmacol Biochem Behav 1992; 41(4):675-82PB

Abstract

Behavioral and neurochemical changes were analyzed in rats after systemical injections of the dopamine receptor agonist apomorphine (0.5 mg/kg) or the indirect agonist amphetamine (1.0 mg/kg). As expected, amphetamine led to an increase in locomotion, whereas apomorphine resulted in decreases in locomotion, rearings, and grooming. The analysis of biogenic amines in tissue samples showed that amphetamine decreased 3,4-dihydroxy-phenylacetic acid (DOPAC) levels and DOPAC/dopamine ratios in the neostriatum, and resulted in a lower 5-hydroxyindole-3-acetic acid (5-HIAA)/5-hydroxytryptamine (5-HT) ratio in the ventral mesencephalon. Apomorphine decreased the dopamine metabolites [DOPAC, homovanillic acid (HVA), 3-methoxy-tyramine (3-MT)] and their respective metabolite/transmitter ratios and increased dopamine levels in the neostriatum. Similar decreases in dopamine metabolites or their ratios were found in the ventral mesencephalon, septum, and frontoparietal cortex but not the thalamus. In addition to its effects on dopamine, apomorphine decreased norepinephrine in the ventral neostriatum and 5-HT and 5-HIAA in the cortex. Correlations between behavioral activity and neurochemical metabolism (using the metabolite-transmitter ratios for the latter) revealed relationships between locomotion and serotonergic activity in the thalamus of animals treated with amphetamine. Evidence for a relationship between locomotion or rearings and dopaminergic activity was found in all six brain areas analyzed. Here, the pattern of correlation was dependent on the kind of treatment and the behavioral and neurochemical measures. These results support earlier findings on the neurochemical effects of apomorphine and amphetamine in the neostriatum and ventral mesencephalon, and add new evidence for an action on the septal area, thalamus, and frontoparietal cortex.

Authors+Show Affiliations

Institute of Physiological Psychology I, Heinrich-Heine-University Düsseldorf, FRG.No affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

1594634

Citation

Schwarting, R K., and J P. Huston. "Behavioral Concomitants of Regional Changes in the Brain's Biogenic Amines After Apomorphine and Amphetamine." Pharmacology, Biochemistry, and Behavior, vol. 41, no. 4, 1992, pp. 675-82.
Schwarting RK, Huston JP. Behavioral concomitants of regional changes in the brain's biogenic amines after apomorphine and amphetamine. Pharmacol Biochem Behav. 1992;41(4):675-82.
Schwarting, R. K., & Huston, J. P. (1992). Behavioral concomitants of regional changes in the brain's biogenic amines after apomorphine and amphetamine. Pharmacology, Biochemistry, and Behavior, 41(4), pp. 675-82.
Schwarting RK, Huston JP. Behavioral Concomitants of Regional Changes in the Brain's Biogenic Amines After Apomorphine and Amphetamine. Pharmacol Biochem Behav. 1992;41(4):675-82. PubMed PMID: 1594634.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Behavioral concomitants of regional changes in the brain's biogenic amines after apomorphine and amphetamine. AU - Schwarting,R K, AU - Huston,J P, PY - 1992/4/1/pubmed PY - 1992/4/1/medline PY - 1992/4/1/entrez SP - 675 EP - 82 JF - Pharmacology, biochemistry, and behavior JO - Pharmacol. Biochem. Behav. VL - 41 IS - 4 N2 - Behavioral and neurochemical changes were analyzed in rats after systemical injections of the dopamine receptor agonist apomorphine (0.5 mg/kg) or the indirect agonist amphetamine (1.0 mg/kg). As expected, amphetamine led to an increase in locomotion, whereas apomorphine resulted in decreases in locomotion, rearings, and grooming. The analysis of biogenic amines in tissue samples showed that amphetamine decreased 3,4-dihydroxy-phenylacetic acid (DOPAC) levels and DOPAC/dopamine ratios in the neostriatum, and resulted in a lower 5-hydroxyindole-3-acetic acid (5-HIAA)/5-hydroxytryptamine (5-HT) ratio in the ventral mesencephalon. Apomorphine decreased the dopamine metabolites [DOPAC, homovanillic acid (HVA), 3-methoxy-tyramine (3-MT)] and their respective metabolite/transmitter ratios and increased dopamine levels in the neostriatum. Similar decreases in dopamine metabolites or their ratios were found in the ventral mesencephalon, septum, and frontoparietal cortex but not the thalamus. In addition to its effects on dopamine, apomorphine decreased norepinephrine in the ventral neostriatum and 5-HT and 5-HIAA in the cortex. Correlations between behavioral activity and neurochemical metabolism (using the metabolite-transmitter ratios for the latter) revealed relationships between locomotion and serotonergic activity in the thalamus of animals treated with amphetamine. Evidence for a relationship between locomotion or rearings and dopaminergic activity was found in all six brain areas analyzed. Here, the pattern of correlation was dependent on the kind of treatment and the behavioral and neurochemical measures. These results support earlier findings on the neurochemical effects of apomorphine and amphetamine in the neostriatum and ventral mesencephalon, and add new evidence for an action on the septal area, thalamus, and frontoparietal cortex. SN - 0091-3057 UR - https://www.unboundmedicine.com/medline/citation/1594634/Behavioral_concomitants_of_regional_changes_in_the_brain's_biogenic_amines_after_apomorphine_and_amphetamine_ L2 - https://linkinghub.elsevier.com/retrieve/pii/0091-3057(92)90211-W DB - PRIME DP - Unbound Medicine ER -