Abstract:
RATIONALE:The contribution of dopamine receptor subtypes in mediating the discriminative stimulus effects of cocaine is not fully established. Many drug discrimination studies use food to maintain responding, necessitating food restriction, which can alter drug effects. OBJECTIVE:This study established stimulus control with cocaine (10 mg/kg) in free-feeding and food-restricted rats responding under a schedule of stimulus shock termination (SST) and in food-restricted rats responding under a schedule of food presentation to examine whether feeding condition or the reinforcer used to maintain responding impacts the effects of cocaine. METHOD:Dopamine receptor agonists and antagonists were examined for their ability to mimic or attenuate, respectively, the effects of cocaine. RESULTS:Apomorphine, quinpirole, and lisuride occasioned >90 % responding on the cocaine-associated lever in free-feeding rats responding under a schedule of SST; apomorphine, but not quinpirole or lisuride, occasioned >90 % responding on the cocaine lever in food-restricted rats responding under a schedule of SST. In food-restricted rats responding for food these drugs occasioned little cocaine lever responding and were comparatively more potent in decreasing responding. In free-feeding rats, the effects of cocaine were attenuated by the D2/D3 receptor antagonist raclopride and the D3 receptor-selective antagonist PG01037. In food-restricted rats, raclopride and the D2 receptor-selective antagonist L-741,626 attenuated the effects of cocaine. Raclopride antagonized quinpirole in all groups while PG01037 antagonized quinpirole only in free-feeding rats. CONCLUSION:These results demonstrate significant differences in the discriminative stimulus of cocaine that are due to feeding conditions and not to the use of different reinforcers across procedures.
journal_name
Psychopharmacology (Berl)journal_title
Psychopharmacologyauthors
Baladi MG,Newman AH,France CPdoi
10.1007/s00213-013-3271-xsubject
Has Abstractpub_date
2014-02-01 00:00:00pages
581-91issue
3eissn
0033-3158issn
1432-2072journal_volume
231pub_type
杂志文章abstract:INTRODUCTION:The present study was designed to investigate the rewarding effects induced by tramadol and its active metabolite O-desmethyltramadol (M1) under a neuropathic pain-like state. RESULTS:In opioid receptor binding and G protein activation, we confirmed that M1, but not tramadol, showed mu-opioid receptor (MO...
journal_title:Psychopharmacology
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doi:10.1007/s00213-008-1180-1
更新日期:2008-10-01 00:00:00
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journal_title:Psychopharmacology
pub_type: 杂志文章
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更新日期:1981-01-01 00:00:00
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journal_title:Psychopharmacology
pub_type: 杂志文章
doi:10.1007/BF00431954
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journal_title:Psychopharmacology
pub_type: 临床试验,杂志文章
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journal_title:Psychopharmacology
pub_type: 杂志文章
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更新日期:1986-01-01 00:00:00
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更新日期:2010-01-01 00:00:00
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journal_title:Psychopharmacology
pub_type: 杂志文章
doi:10.1007/BF00571418
更新日期:1978-01-31 00:00:00
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journal_title:Psychopharmacology
pub_type: 杂志文章
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更新日期:1988-01-01 00:00:00
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pub_type: 临床试验,杂志文章
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journal_title:Psychopharmacology
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pub_type: 临床试验,杂志文章
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journal_title:Psychopharmacology
pub_type: 杂志文章
doi:10.1007/BF00449124
更新日期:1982-01-01 00:00:00
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journal_title:Psychopharmacology
pub_type: 杂志文章
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更新日期:1997-10-01 00:00:00
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journal_title:Psychopharmacology
pub_type: 杂志文章
doi:10.1007/s00213-012-2819-5
更新日期:2013-01-01 00:00:00
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journal_title:Psychopharmacology
pub_type: 杂志文章
doi:10.1007/BF00432745
更新日期:1981-01-01 00:00:00
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journal_title:Psychopharmacology
pub_type: 杂志文章
doi:10.1007/BF00432756
更新日期:1981-01-01 00:00:00
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journal_title:Psychopharmacology
pub_type: 杂志文章
doi:10.1007/s00213-013-3101-1
更新日期:2013-09-01 00:00:00
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journal_title:Psychopharmacology
pub_type: 杂志文章
doi:10.1007/BF00431782
更新日期:1985-01-01 00:00:00
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journal_title:Psychopharmacology
pub_type: 杂志文章
doi:10.1007/s002130050563
更新日期:1998-04-01 00:00:00
abstract::Evidence has been provided for impaired neurotransmitter functioning in the brain of elderly subjects. In order to assess central GABAergic transmission, the activity of the hypothalamic GABA system may be investigated by basal growth hormone (GH) response to the GABAergic drug sodium valproate (SV). For this purpose ...
journal_title:Psychopharmacology
pub_type: 临床试验,杂志文章
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更新日期:1987-01-01 00:00:00