Abstract:
RATIONALE:Increasing concomitant abuse of cocaine and morphine-like opioids has prompted a number of studies aimed at understanding how these drugs interact. OBJECTIVE:The present study was designed to determine if variations in opioid pretreatment time would affect how mu opioid agonists interact with cocaine. METHODS:Rats were trained to discriminate 10 mg/kg cocaine from saline. One group of subjects (n=6) received morphine (5.6 mg/kg) 0.5 h, 1 h or 4 h prior to cumulative doses of cocaine (0.1-17.8 mg/kg). These pretreatment times were selected to overlap with states of acute opioid tolerance (approximately 1 h) or acute opioid dependence (approximately 4 h) as demonstrated by previous studies. A second group (n=6) was administered naloxone (0.3 mg/kg) 5 min prior to cumulative cocaine doses, with or without a 4-h morphine (5.6 mg/kg) or methadone (3.0 mg/kg) pretreatment. In a third procedure, the same subjects used in the second experiment were also tested for time-dependent changes in the analgesic effect of morphine using a hot-plate assay. RESULTS:Morphine pretreatment 1 h prior to assessment of the cocaine dose-response function significantly enhanced the discriminative stimulus effects of cocaine. However, neither 0.5-h or 4-h morphine pretreatment had any effect. In contrast, when naloxone was administered 4 h following either morphine or methadone and 5 min prior to assessment of the cocaine dose-response curve, the discriminative stimulus effects of cocaine were significantly attenuated. In assessing morphine-induced analgesia, paw-lick latency was significantly longer at 1 h and shorter at 4 h following morphine administration. CONCLUSIONS:The results illustrate the importance of temporal parameters for interactions between cocaine and mu opioid agonists.
journal_name
Psychopharmacology (Berl)journal_title
Psychopharmacologyauthors
Green-Jordan K,Warren L,Kantak KMdoi
10.1007/s002130100732subject
Has Abstractpub_date
2001-08-01 00:00:00pages
427-34issue
4eissn
0033-3158issn
1432-2072journal_volume
156pub_type
杂志文章abstract:RATIONALE:During the course of our investigation of antalarmin, a corticotropin-releasing hormone (CRH) antagonist, in rhesus monkeys, we noticed that large, intravenous doses of antalarmin resulted in behavioral changes that resembled intoxication. OBJECTIVES:Antalarmin was evaluated in rhesus monkeys for its reinfor...
journal_title:Psychopharmacology
pub_type: 杂志文章
doi:10.1007/s00213-002-1187-y
更新日期:2002-11-01 00:00:00
abstract::Serotonergic mechanisms have been implicated in the pathophysiology of depression and in the neuropharmacology of antidepressant treatment. One measure of central serotonergic function is the prolactin (PRL) response to IV L-tryptophan (L-TRP). We used the L-TRP test to assess the role of serotonin in the mechanism of...
journal_title:Psychopharmacology
pub_type: 杂志文章
doi:10.1007/BF02245291
更新日期:1992-01-01 00:00:00
abstract::Methaqualone produces a dose- and time-dependent increase in plasma corticosterone concentration in mice. Acute studies showed that this effect is largely independent of methaqualone-induced hypothermia but can be blocked by pretreatment with dexamethasone, thus demonstrating that the adrenal cortex is not being direc...
journal_title:Psychopharmacology
pub_type: 杂志文章
doi:10.1007/BF00426541
更新日期:1977-08-31 00:00:00
abstract::Previous studies indicate that some aspects of endotoxin-induced sickness behavior in rats may be mediated by interleukin-1 stimulated events and can be attenuated by corticosteroids, cyclooxygenase inhibitors and the interleukin-1-receptor antagonist. In the current studies, we replicate and extend these findings in ...
journal_title:Psychopharmacology
pub_type: 杂志文章
doi:10.1007/s002130050353
更新日期:1997-08-01 00:00:00
abstract:RATIONALE:The endogenous cannabinoid system is thought to play a role in reinforcement processes. OBJECTIVES:We tested the effects of five doses of the cannabinoid receptor 1 (CB1) antagonist SR141716 [0, 0.3, 1, 3 and 10 mg/kg intraperitoneal (IP)] on intracranial self-stimulation at the level of the median forebrain...
journal_title:Psychopharmacology
pub_type: 杂志文章
doi:10.1007/s002130100804
更新日期:2001-09-01 00:00:00
abstract:RATIONALE:Behavioral and dopamine responses to cocaine are sexually dimorphic: Female rats exhibit higher levels of locomotor and reward-associated behaviors after cocaine administration and dopamine release than do males. Activation of the dopamine- and cAMP-regulated phosphoprotein of Mr 32 kDa (DARPP-32) intracellul...
journal_title:Psychopharmacology
pub_type: 杂志文章
doi:10.1007/s00213-008-1388-0
更新日期:2009-03-01 00:00:00
abstract:RATIONALE:Results from clinical studies have shown that topiramate effectively reduces alcohol consumption in a population of heavy-drinking alcohol-dependent humans. OBJECTIVES:We undertook this preclinical study in order to establish topiramate's efficacy in a rodent model and to determine whether topiramate's effic...
journal_title:Psychopharmacology
pub_type: 杂志文章
doi:10.1007/s00213-009-1683-4
更新日期:2010-01-01 00:00:00
abstract:RATIONALE:Impulsivity is related to greater risk of nicotine dependence, perhaps by enhancing sensitivity to nicotine's reinforcing and rewarding effects during initial smoking experiences. OBJECTIVE:We examined the influence of impulsivity characteristics on acute sensitivity to nicotine reward, reinforcement, and ot...
journal_title:Psychopharmacology
pub_type: 杂志文章
doi:10.1007/s00213-008-1231-7
更新日期:2008-11-01 00:00:00
abstract:RATIONALE:Successive negative contrast (SNC) describes a change in the behaviour of an animal following a downshift in the quantitative or qualitative value of an expected reward. This behavioural response has been hypothesised to be linked to affective state, with negative states associated with larger and/or prolonge...
journal_title:Psychopharmacology
pub_type: 杂志文章
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更新日期:2015-08-01 00:00:00
abstract:RATIONALE:Previous studies have postulated functional links between GABA and cannabinoid systems in the hippocampus. The aim of the present study was to investigate any possible interaction between these systems in spatial change and object novelty discrimination memory consolidation in the dorsal hippocampus (CA1 regi...
journal_title:Psychopharmacology
pub_type: 杂志文章
doi:10.1007/s00213-017-4688-4
更新日期:2017-10-01 00:00:00
abstract:RATIONALE:Endogenous γ-aminobutyric acidA receptor (GABAAR)-active neurosteroids (e.g., allopregnanolone) regulate central nervous system excitability and many physiological functions, so fluctuations are implicated in several neuropsychiatric disorders. Pertinently, evidence supports an inverse relationship between en...
journal_title:Psychopharmacology
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doi:10.1007/s00213-017-4671-0
更新日期:2017-09-01 00:00:00
abstract:RATIONALE:Rolipram, an inhibitor of cyclic AMP phosphodiesterase (PDE4) produces discriminative stimulus effects in rats. These effects may be related to a wide range of central nervous system effects described previously. OBJECTIVE:The purposes of the present study were to: (i) assess the specificity of the discrimin...
journal_title:Psychopharmacology
pub_type: 杂志文章
doi:10.1007/s002130100878
更新日期:2001-11-01 00:00:00
abstract::The results confirm that NMDA receptor blockade can result in improved retention performance of mice in step-down passive avoidance. A series of behavioural variations and analyses revealed that memory in the task depended mainly on the appearance of the grid that had been associated with shock, rather than on the exe...
journal_title:Psychopharmacology
pub_type: 杂志文章
doi:10.1007/BF02244300
更新日期:1991-01-01 00:00:00
abstract::The anti-withdrawal effect of clonidine was studied using quasi-morphine abstinence behaviour induced by dipropylacetate (DPA) in naive rats. Clonidine potently suppressed body shakes and locomotor activity (ID50 30 and 40 micrograms/kg IP respectively). Phenoxybenzamine and prazosine did not antagonize the anti-withd...
journal_title:Psychopharmacology
pub_type: 杂志文章
doi:10.1007/BF00427276
更新日期:1983-01-01 00:00:00
abstract:RATIONALE:Several lines of evidence suggest that the pathophysiology of schizophrenia may be associated with altered noradrenergic and glucoregulatory function. OBJECTIVE:The aim of this study was to investigate these alterations during a perturbed homeostatic state. METHODS:Fifteen patients with schizophrenia and 13...
journal_title:Psychopharmacology
pub_type: 杂志文章
doi:10.1007/s00213-004-1890-y
更新日期:2004-11-01 00:00:00
abstract::Chronic administration of the pre-synaptic alpha-adrenoreceptor agonist clonidine decreases the concentration of the extra-neuronal metabolite of noradrenaline normetanephrine in the amygdaloid cortex and increases it in the mid-brain. Conversely, blockade of these pre-synaptic receptors by yohimbine increases the nor...
journal_title:Psychopharmacology
pub_type: 杂志文章
doi:10.1007/BF00427519
更新日期:1979-09-01 00:00:00
abstract::In mice that were scored for the length of time they remained immobile in awkward postures (cataleptic) on an inclined wire grid, a large IP dose of pilocarpine (80 mg/kg) caused a clear catalepsy, which was prevented by both dopamine agonists that were tested, apomorphine (4 or 8 mg/kg, IP) and bromocriptine (8 mg/kg...
journal_title:Psychopharmacology
pub_type: 杂志文章
doi:10.1007/BF00431769
更新日期:1985-01-01 00:00:00
abstract:AIM:It is widely assumed that the upcoming therapeutics for Alzheimer's disease will require to act on more than one target to be effective. We investigated here whether a combination of the nicotinic receptor allosteric modulator/cholinesterase inhibitor galantamine can act synergistically with the type 4 serotonin re...
journal_title:Psychopharmacology
pub_type: 杂志文章
doi:10.1007/s00213-017-4664-z
更新日期:2017-08-01 00:00:00
abstract:RATIONALE:Receptor mechanisms underlying the behavioral effects of clinically used nicotinic acetylcholine receptor agonists have not been fully established. OBJECTIVE:Drug discrimination was used to compare receptor mechanisms underlying the effects of smoking cessation aids. METHODS:Separate groups of male C57BL/6J...
journal_title:Psychopharmacology
pub_type: 杂志文章
doi:10.1007/s00213-013-3037-5
更新日期:2013-07-01 00:00:00
abstract::Both muscarinic antagonists, such as scopolamine, and benzodiazepine receptor (BZR) agonists, such as diazepam, produce a reliable impairment in the performance of one trial passive avoidance. Such deficits are frequently interpreted as drug-induced amnesia. However, these deficits could also result from a learning im...
journal_title:Psychopharmacology
pub_type: 杂志文章
doi:10.1007/BF02245247
更新日期:1995-03-01 00:00:00
abstract:RATIONAL:In recent years, evidence suggests that modafinil may be useful for certain symptom domains of schizophrenia, especially for the negative and cognitive symptoms. However, the results are not consistent. OBJECTIVE:This study was designed to investigate the effect of modafinil added to risperidone in patients w...
journal_title:Psychopharmacology
pub_type: 杂志文章,随机对照试验
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更新日期:2012-04-01 00:00:00
abstract::In a test of conditioned punishment, saline-treated controls showed a moderate bias in responding away from a lever producing a response-contingent auditory conditioned stimulus (CS) that had been paired with mild footshock during training and towards a lever producing a neutral auditory CS. Systemic treatment with th...
journal_title:Psychopharmacology
pub_type: 杂志文章
doi:10.1007/s002130050174
更新日期:1997-01-01 00:00:00
abstract::The effects of scopolamine, an anticholinergic drug, of trimipramine, a tricyclic antidepressant with both anticholinergic and sedative properties, of diazepam and a placebo, on explicit memory and repetition priming were assessed using a free-recall task and a word-stem completion task. Forty-eight healthy volunteers...
journal_title:Psychopharmacology
pub_type: 临床试验,杂志文章
doi:10.1007/BF02244116
更新日期:1990-01-01 00:00:00
abstract:RATIONALE:The notion that the onset of action of antidepressant drugs (ADs) takes weeks is widely accepted; however, the sequence of events necessary for therapeutic effects still remains obscure. OBJECTIVE:We aimed to evaluate a time-course of ADs-induced alterations in the expression of 95 selected genes in 4 region...
journal_title:Psychopharmacology
pub_type: 杂志文章
doi:10.1007/s00213-012-2714-0
更新日期:2012-10-01 00:00:00
abstract::The effects of morphine, ketocyclazocine, cyclazocine, and SKF-10,047 were tested alone and in conjunction with naltrexone or naloxone, in rats responding under a multiple fixed-interval 3-min schedule of food presentation. Under this paradigm, electric shock was delivered on a fixed-ratio schedule for responses occur...
journal_title:Psychopharmacology
pub_type: 杂志文章
doi:10.1007/BF00435274
更新日期:1982-01-01 00:00:00
abstract::This study examined the possibility that amphetamine-induced stereotypy and facilitation of memory consolidation are both mediated by amphetamine's stimulation of dopaminergic activity in the caudate nucleus. In the first experiment, rats were given pairings of a tone and a shock followed by SC amphetamine (2 mg/kg). ...
journal_title:Psychopharmacology
pub_type: 杂志文章
doi:10.1007/BF00427774
更新日期:1984-01-01 00:00:00
abstract:RATIONALE:Beneficial effects of nicotine on cognitive processes including attention have potential therapeutic uses and have been proposed as incentives for tobacco smoking. OBJECTIVES:To establish task conditions under which the effects of nicotine on attention are obtained reliably and to characterise such effects f...
journal_title:Psychopharmacology
pub_type: 杂志文章
doi:10.1007/s00213-002-1005-6
更新日期:2002-07-01 00:00:00
abstract::The effects of naloxone on diazepam-induced release of behavior in aversive situations were investigated in rats. Naloxone (0.5 and 1 mg/kg-1) suppressed diazepam-induced eating in an unfamiliar situation and reduced (1 mg/kg-1) spontaneous food intake. Naloxone (1 mg/kg-1) canceled the increased lever pressing produc...
journal_title:Psychopharmacology
pub_type: 杂志文章
doi:10.1007/BF00426529
更新日期:1980-01-01 00:00:00
abstract::It was the aim of the present study to determine the affinities of four neuroleptics and five antidepressants for histamine H3 receptors. In rat brain cortex membranes, the specifically bound [3H]-N alpha-methylhistamine was monophasically displaced by clozapine (pKi 6.15). The other drugs did not completely displace ...
journal_title:Psychopharmacology
pub_type: 杂志文章
doi:10.1007/BF02247479
更新日期:1994-12-01 00:00:00
abstract::The purpose of this study was to investigate the developmental differences in seizure susceptibility in mice and the roles of the histaminergic neuron system in inhibition of convulsions in development. First, we studied developmental differences in electrically-induced seizures. Since the 14-day-old mice showed a dif...
journal_title:Psychopharmacology
pub_type: 杂志文章
doi:10.1007/BF02244911
更新日期:1993-01-01 00:00:00