Abstract：
:Amphetamine increases extracellular dopamine and induces locomotor and stereotypical behaviors in rats. This study examined the effect of the dopamine D2/D3 receptor antagonist sulpiride (50 mg/kg s.c.) on the dopaminergic response to amphetamine (0.5, 2.0, or 8.0 mg/kg i.p.) in male Sprague-Dawley rats. Extracellular dopamine in the striatum was monitored using in vivo microdialysis and high performance liquid chromatography with electrochemical detection. Dopamine concentration curves were analyzed using non-linear regression and residual F-testing. Amphetamine enhanced extracellular dopamine in a dose-dependent manner. Sulpiride augmented the increase in dopamine induced by 0.5 and 2 mg/kg amphetamine by decreasing the rate of dopamine concentration fall off in the extracellular space (P<0.05). Sulpiride also potentiated the amount of dopamine increased by 8 mg/kg amphetamine, but did so by affecting the maximum concentration achieved (P<0.05), not the onset or offset rates. We conclude that the primary effect of a dopamine D2/D3 receptor antagonist is a potentiation of the effect of amphetamine on extracellular striatal dopamine levels, which may contribute to the enhanced stereotypic effects observed when paired with amphetamine.
journal_name
Eur J Pharmacoljournal_title
European journal of pharmacologyauthors
Jaworski JN,Gonzales RA,Randall PKdoi
10.1016/s0014-2999(01)00936-0keywords:
subject
Has Abstractpub_date
2001-04-27 00:00:00pages
201-6issue
3eissn
0014-2999issn
1879-0712pii
S0014299901009360journal_volume
418pub_type
杂志文章abstract：:The effects of 1,4-dihydropyridine derivatives on divalent cation transients and catecholamine release stimulated by either high K+ or the nicotinic receptor agonist dimethyl-phenyl-piperazinium (DMPP) have been compared in bovine adrenal chromaffin cells. The activation of Ca2+ entry pathways was followed by measurin...
journal_title：European journal of pharmacology
pub_type： 杂志文章
doi：10.1016/0922-4106(93)90078-n
更新日期：1993-10-15 00:00:00
abstract：:Previous functional studies with the rat jugular vein have shown alpha-adrenergically mediated contraction was minimal to nonexistent, yet this tissue relaxed in response to norepinephrine via beta 1 and to isoproterenol via beta 2-receptor activation. Unlike the rat jugular vein, the rat aorta markedly contracted to ...
journal_title：European journal of pharmacology
pub_type： 杂志文章
doi：10.1016/0014-2999(92)90182-4
更新日期：1992-08-06 00:00:00
abstract：:The chick has a practical advantage in the screening process in that chicks require only small quantities of drugs. The chick separation stress paradigm has traditionally been recognized as a valid form of anxiolytic screening. Further, chick behavior involving standing motionless with eyes closed or sitting motionles...
journal_title：European journal of pharmacology
pub_type： 杂志文章,评审
doi：10.1016/j.ejphar.2015.06.036
更新日期：2015-09-05 00:00:00
abstract：:The potent alpha-adrenergic agonist DPI, which has also been claimed to be a selective dopaminergic agonist, was shown to reduce rat striatal dopamine (DA) synthesis, DA utilization and DA metabolism following intraperitoneal administration (25 mumol/kg). An analytical procedure for the determination of DPI was develo...
journal_title：European journal of pharmacology
pub_type： 杂志文章
doi：10.1016/0014-2999(82)90603-3
更新日期：1982-06-16 00:00:00
abstract：:The effects of CS-518 (sodium 2-(1-imidazolylmethyl)-4,5-dihydrobenzo[b]thiophene-6-carboxylate) , a thromboxane A2 synthase inhibitor, on eosinophil accumulation and activation were investigated in an experimental asthmatic guinea pig model and several cellular models. In the in vivo studies, CS-518 inhibited the bip...
journal_title：European journal of pharmacology
pub_type： 杂志文章
doi：10.1016/0014-2999(93)90989-u
更新日期：1993-08-03 00:00:00
abstract：:Thiorphan, the potent inhibitor of 'enkephalinase', has shown some analgesic properties in experimental animals and in man. The possibility that the intravenous infusion of acetorphan, a prodrug of thiorphan (26 micrograms/kg per min for 60 min), can inhibit plasma and cerebrospinal fluid (CSF) enkephalinase in man in...
journal_title：European journal of pharmacology
pub_type： 杂志文章
doi：10.1016/0014-2999(86)90094-4
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abstract：:Genistein, a phytoestrogen, possesses cardioprotective effects. Responses to genistein (0.1-100 microM) were assessed in 9,11-dideoxy-9 alpha, 11 alpha-methanoepoxy prostaglandin F(2 alpha) (U46619)-contracted porcine coronary arterial rings, with significant relaxations at high concentrations. At concentrations with ...
journal_title：European journal of pharmacology
pub_type： 杂志文章
doi：10.1016/j.ejphar.2003.09.028
更新日期：2003-11-28 00:00:00
abstract：:An 125I-iodinated ryanodine analog, modified by attaching an iodo-Cbz-beta-alanyl group to the C10eq hydroxy of ryanodine (iodo-carbobenzyloxy-beta-alanyl-ryanodine), binds to cardiac sarcoplasmic reticulum Ca2+ release channels with equal affinity as [3H]ryanodine. In the present study, both iodo-Cbz-beta-alanyl-ryan...
journal_title：European journal of pharmacology
pub_type： 杂志文章
doi：10.1016/0922-4106(94)90061-2
更新日期：1994-08-16 00:00:00
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journal_title：European journal of pharmacology
pub_type： 杂志文章
doi：10.1016/0014-2999(77)90138-8
更新日期：1977-11-01 00:00:00
abstract：:Peroxynitrite, the reaction product of nitric oxide and superoxide, may contribute to vascular tissue oxidant stress in diabetes mellitus. The aim was to establish whether the peroxynitrite decomposition catalyst 5,10,15,20-tetrakis(N-methyl-4'-pyridyl)porphyrinato iron III (FeTMPyP) could improve nitric oxide-depende...
journal_title：European journal of pharmacology
pub_type： 杂志文章
doi：10.1016/j.ejphar.2004.08.033
更新日期：2004-10-11 00:00:00
abstract：:The antihypertensive drug doxazosin has been associated with an increased risk for congestive heart failure and cardiomyocyte apoptosis. Human ether-a-go-go-related gene (hERG) K(+) channels, previously shown to be blocked by doxazosin at therapeutically relevant concentrations, represent plasma membrane receptors for...
journal_title：European journal of pharmacology
pub_type： 杂志文章
doi：10.1016/j.ejphar.2007.10.051
更新日期：2008-01-28 00:00:00
abstract：:The development of selective corticotropin-releasing factor type-1 (CRF1) receptor antagonists represents a potential novel treatment for depression. These studies evaluated CRF1 receptor antagonists for antidepressant-like activity in mice. Subchronic dosing of both R 121919 (3-[6-(dimethylamino)-4-methyl-pyrid-3-yl]...
journal_title：European journal of pharmacology
pub_type： 杂志文章
doi：10.1016/j.ejphar.2004.07.091
更新日期：2004-09-19 00:00:00
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journal_title：European journal of pharmacology
pub_type： 杂志文章
doi：10.1016/0922-4106(94)90156-2
更新日期：1994-05-17 00:00:00
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journal_title：European journal of pharmacology
pub_type： 杂志文章
doi：10.1016/j.ejphar.2012.02.008
更新日期：2012-05-05 00:00:00
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journal_title：European journal of pharmacology
pub_type： 杂志文章
doi：10.1016/j.ejphar.2015.05.047
更新日期：2015-08-15 00:00:00
abstract：:D,L-Propranolol given in single doses by gavage or s.c. injection to awake rats, always slowed the heart without affecting blood pressure. Doses of 0.2 mg/100 g injected twice daily lowered systolic pressure after 3 days in DOCA hypertensive but not in normotensive or spontaneously hypertensive rats. When chronic trea...
journal_title：European journal of pharmacology
pub_type： 杂志文章
doi：10.1016/0014-2999(77)90038-3
更新日期：1977-06-15 00:00:00
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journal_title：European journal of pharmacology
pub_type： 杂志文章
doi：10.1016/0014-2999(77)90126-1
更新日期：1977-05-15 00:00:00
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journal_title：European journal of pharmacology
pub_type： 杂志文章
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journal_title：European journal of pharmacology
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journal_title：European journal of pharmacology
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abstract：:The novel anti-ischemic compound, BMS-204352 ((3S)-(+)-(5-chloro-2-methoxyphenyl)-1,3-dihydro-3-fluoro-6-(trifluoromethyl)-2H-indol-2-one)), strongly activates the voltage-gated K+ channel KCNQ5 in a concentration-dependent manner with an EC50 of 2.4 microM. At 10 microM, BMS-204352 increased the steady state current ...
journal_title：European journal of pharmacology
pub_type： 杂志文章
doi：10.1016/s0014-2999(02)01287-6
更新日期：2002-02-22 00:00:00
abstract：:The study concerned the effects of chlorpromazine (CPZ), monodesmethyl-chlorpromazine (NOR1-CPZ), didesmethyl-chlorpromazine (NOR2-CPZ), and chlorpromazine-N-oxide (CPZ-NO) on the EEG and on dopamine metabolism of the isolated perfused rat brain. Isolated brains were perfused with 100 ml of a perfusion medium containi...
journal_title：European journal of pharmacology
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journal_title：European journal of pharmacology
pub_type： 杂志文章
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更新日期：2018-08-15 00:00:00
abstract：:This study was designed to investigate the effect and mechanism of allicin on hyperhomocysteinemia-induced experimental vascular endothelial dysfunction in rats. Fifty male Wistar rats were randomly divided into five groups: the normal control rats (NC), the high-methionine-diet rats (Met), the high-methionine-diet ra...
journal_title：European journal of pharmacology
pub_type： 杂志文章
doi：10.1016/j.ejphar.2013.05.038
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abstract：:Hyperphosphatemia is associated with severe decline of renal function in chronic kidney disease and elevates cardiovascular mortality. Type II sodium dependent phosphate transporter 2A (Npt2A) plays a major role in renal phosphate reabsorption and could be explored as a target for anti-hyperphosphatemia therapy. Human...
journal_title：European journal of pharmacology
pub_type： 杂志文章
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更新日期：2013-12-05 00:00:00
abstract：:While muscarinic receptor antagonists are used to reduce motor side effects associated with the use of antipsychotic drugs, their site of action remains unclear. The study investigated the site of action of the non-selective muscarinic receptor antagonist atropine on catalepsy induced by the selective dopamine D2 rece...
journal_title：European journal of pharmacology
pub_type： 杂志文章
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journal_title：European journal of pharmacology
pub_type： 杂志文章
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journal_title：European journal of pharmacology
pub_type： 杂志文章
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abstract：:Termination of signalling by G-protein-coupled receptors requires inactivation of the G alpha-subunits of heterotrimeric G-proteins and the re-association of G alpha- and G betagamma-subunits. Inactivation of G alpha-subunits is achieved by the hydrolysis of bound GTP by an intrinsic GTPase activity, which is consider...
journal_title：European journal of pharmacology
pub_type： 杂志文章
doi：10.1016/j.ejphar.2008.03.047
更新日期：2008-06-10 00:00:00
abstract：:Nafazatrom, an inhibitor of arachidonate metabolism by the lipoxygenase enzymes, decreases basal prolactin and growth hormone release in a concentration-dependent manner without significantly affecting the synthesis of either hormone. It is required that nafazatrom be incubated with pituitary cells for approximately 2...
journal_title：European journal of pharmacology
pub_type： 杂志文章
doi：10.1016/0014-2999(86)90761-2
更新日期：1986-09-09 00:00:00
