Abstract
Previous reports indicate that amphetamine produces a dose-dependent shift in the firing rate of neurons in the anterior neostriatum that parallels the shift in behavior from locomotion to focused stereotypy. To determine if para-chlorophenylalanine (PCPA), which alters the pattern of the behavioral response to amphetamine, also changes the pattern of the neuronal response to the drug, a dose-response analysis was performed on amphetamine-induced changes in unit activity in the anterior neostriatum of rats pretreated 48 h previously with 300 mg/kg PCPA or vehicle. An intraperitoneal injection of 1.0 mg/kg d-amphetamine, which inhibited neostriatal activity in vehicle controls, produced in PCPA-pretreated animals a prolonged excitation. In contrast, the pronounced increase in firing rate produced by 7.5 mg/kg d-amphetamine in control rats was significantly reduced following PCPA pretreatment. Liquid chromatograhy with electrochemical detection revealed that compared to controls, PCPA produced a significant reduction of serotonin, but not dopamine or norepinephrine, in the telencephalon. The differential effects of PCPA on the action of low and high doses of d-amphetamine in the anterior neostriatum may explain the differential influence of serotonergic systems on amphetamine-induced locomotion and stereotypy.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 277-289 |
| Number of pages | 13 |
| Journal | Brain research |
| Volume | 210 |
| Issue number | 1-2 |
| DOIs | |
| State | Published - Apr 6 1981 |
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All Science Journal Classification (ASJC) codes
- Neuroscience(all)
- Molecular Biology
- Clinical Neurology
- Developmental Biology
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Apparent serotonergic modulation of the dose-dependent biphasic response of neostriatal neurons produced by d-amphetamine. / Rebec, George V.; Alloway, Kevin D.; Curtis, Stephen D.
In: Brain research, Vol. 210, No. 1-2, 06.04.1981, p. 277-289.Research output: Contribution to journal › Article
TY - JOUR
T1 - Apparent serotonergic modulation of the dose-dependent biphasic response of neostriatal neurons produced by d-amphetamine
AU - Rebec, George V.
AU - Alloway, Kevin D.
AU - Curtis, Stephen D.
PY - 1981/4/6
Y1 - 1981/4/6
N2 - Previous reports indicate that amphetamine produces a dose-dependent shift in the firing rate of neurons in the anterior neostriatum that parallels the shift in behavior from locomotion to focused stereotypy. To determine if para-chlorophenylalanine (PCPA), which alters the pattern of the behavioral response to amphetamine, also changes the pattern of the neuronal response to the drug, a dose-response analysis was performed on amphetamine-induced changes in unit activity in the anterior neostriatum of rats pretreated 48 h previously with 300 mg/kg PCPA or vehicle. An intraperitoneal injection of 1.0 mg/kg d-amphetamine, which inhibited neostriatal activity in vehicle controls, produced in PCPA-pretreated animals a prolonged excitation. In contrast, the pronounced increase in firing rate produced by 7.5 mg/kg d-amphetamine in control rats was significantly reduced following PCPA pretreatment. Liquid chromatograhy with electrochemical detection revealed that compared to controls, PCPA produced a significant reduction of serotonin, but not dopamine or norepinephrine, in the telencephalon. The differential effects of PCPA on the action of low and high doses of d-amphetamine in the anterior neostriatum may explain the differential influence of serotonergic systems on amphetamine-induced locomotion and stereotypy.
AB - Previous reports indicate that amphetamine produces a dose-dependent shift in the firing rate of neurons in the anterior neostriatum that parallels the shift in behavior from locomotion to focused stereotypy. To determine if para-chlorophenylalanine (PCPA), which alters the pattern of the behavioral response to amphetamine, also changes the pattern of the neuronal response to the drug, a dose-response analysis was performed on amphetamine-induced changes in unit activity in the anterior neostriatum of rats pretreated 48 h previously with 300 mg/kg PCPA or vehicle. An intraperitoneal injection of 1.0 mg/kg d-amphetamine, which inhibited neostriatal activity in vehicle controls, produced in PCPA-pretreated animals a prolonged excitation. In contrast, the pronounced increase in firing rate produced by 7.5 mg/kg d-amphetamine in control rats was significantly reduced following PCPA pretreatment. Liquid chromatograhy with electrochemical detection revealed that compared to controls, PCPA produced a significant reduction of serotonin, but not dopamine or norepinephrine, in the telencephalon. The differential effects of PCPA on the action of low and high doses of d-amphetamine in the anterior neostriatum may explain the differential influence of serotonergic systems on amphetamine-induced locomotion and stereotypy.
UR - http://www.scopus.com/inward/record.url?scp=0019412356&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0019412356&partnerID=8YFLogxK
U2 - 10.1016/0006-8993(81)90901-X
DO - 10.1016/0006-8993(81)90901-X
M3 - Article
C2 - 6452929
AN - SCOPUS:0019412356
VL - 210
SP - 277
EP - 289
JO - Brain Research
JF - Brain Research
SN - 0006-8993
IS - 1-2
ER -