Abstract:
:Alpha(2A)-Adrenoceptors mediate the antinociceptive effects of alpha(2)-adrenoceptor agonists in mice, and analgesic synergism between noradrenergic and opioidergic mechanisms has been reported to be lacking in mice devoid of functional alpha(2A)-adrenoceptors. We investigated whether the antinociceptive actions of opioid agonists with different efficacy would be altered in mice with targeted inactivation of the alpha(2A)-adrenoceptor gene (alpha(2A)-KO mice). The antinociceptive effects of fentanyl, morphine, buprenorphine and tramadol were assessed using conventional tail-flick and hot-plate assays. Antinociceptive responses to fentanyl were unaltered in the alpha(2A)-KO animals. Morphine analgesia was slightly accentuated in the tail-flick test. The naloxone-sensitive antinociceptive responses to both tested weak partial agonists were very markedly accentuated in both tests. For example, after 40 mg/kg tramadol administration, the tramadol-induced prolongation of tail-flick latency was 86+/-6% of the maximal possible effect (MPE) in alpha(2A)-KO and 22+/-2% of MPE in control mice; prolongation of hot-plate latency was 93+/-5% of MPE in alpha(2A)-KO mice and 8+/-2% of MPE in the controls (P<0.001 for both). The effects of alpha(2A)-KO were mimicked by pretreatment of wild-type control mice with the alpha(2)-adrenoceptor antagonists, atipamezole and yohimbine; the apparent efficacy of tramadol and buprenorphine now approached that of morphine and fentanyl. Other behavioural effects of the tested opioid agonists were not similarly influenced by alpha(2A)-KO. Antagonists of alpha(2A)-adrenoceptors may offer a novel mechanism to augment the antinociceptive actions of partial opioid agonists.
journal_name
Eur J Pharmacoljournal_title
European journal of pharmacologyauthors
Ozdoğan UK,Lähdesmäki J,Scheinin Mdoi
10.1016/j.ejphar.2005.10.029keywords:
subject
Has Abstractpub_date
2006-01-04 00:00:00pages
105-13issue
1-3eissn
0014-2999issn
1879-0712pii
S0014-2999(05)01095-2journal_volume
529pub_type
杂志文章abstract::We investigated the role of interleukin-1 in the induction of a Ca(2+)-independent nitric oxide (NO) synthase by bacterial endotoxin in vivo. In anaesthetized rats, pretreatment with interleukin-1 receptor antagonist (interleukin-1ra; 16 mg kg-1 i.v., followed by an infusion of 2.4 mg kg-1 h-1) ameliorated the delayed...
journal_title:European journal of pharmacology
pub_type: 杂志文章
doi:10.1016/0014-2999(93)90634-t
更新日期:1993-11-30 00:00:00
abstract::Galectins are carbohydrate-binding proteins and these have very high affinity for β-galactoside containing glycoproteins and glycolipids. Amongst sixteen types of galectin, the role of galectin 1, 3, 9 and 12 is defined in the development and progression of different types of leukemia including acute myeloid leukemia,...
journal_title:European journal of pharmacology
pub_type: 杂志文章,评审
doi:10.1016/j.ejphar.2018.11.019
更新日期:2019-02-05 00:00:00
abstract::Visfatin is a novel adipokine involved in the process of atherosclerosis. We assessed the effect of rosuvastatin on plasma visfatin levels in patients with primary hyperlipidemia. Eighty hyperlipidemic patients without evidence of cardiovascular disease were randomized to receive either rosuvastatin 10 mg/day or thera...
journal_title:European journal of pharmacology
pub_type: 杂志文章,随机对照试验
doi:10.1016/j.ejphar.2007.09.019
更新日期:2008-01-14 00:00:00
abstract::Alzheimer's disease is the most common form of dementia, causing progressive cognitive dysfunction, particularly memory loss. Recently, modulation of beta-amyloid (Abeta) toxicity, one of the major potential causes of Alzheimer's disease, has emerged as a possible therapeutic approach to control the onset of Alzheimer...
journal_title:European journal of pharmacology
pub_type: 杂志文章
doi:10.1016/j.ejphar.2009.09.007
更新日期:2009-11-10 00:00:00
abstract::The inclusion of antioxidant for the treatment of arthritis, especially under the therapy with immunosuppressant, is motivated because antioxidant plays an essential role in disease progression and moreover, immunosuppressive treatment suffers redox homeostasis balance of the organism. The aim of the present study was...
journal_title:European journal of pharmacology
pub_type: 杂志文章
doi:10.1016/j.ejphar.2012.11.004
更新日期:2013-01-05 00:00:00
abstract::Schedule-induced polydipsia occurs when food-deprived rats are exposed to a fixed-interval feeding schedule (FI = 60 s) for 1 h every day. Amperozide, a novel antipsychotic drug with a strong affinity for the 5-HT2 receptor, was injected i.p. after completion of the requisite training sessions. The experimental ration...
journal_title:European journal of pharmacology
pub_type: 杂志文章
doi:10.1016/0014-2999(94)90245-3
更新日期:1994-04-21 00:00:00
abstract::The activation of C-fibers in the airways induces coughing, mucus production and bronchoconstriction, which are also symptoms of airway diseases. In this study, we evaluated the role of the C-fibers and the TRPV1 (transient receptor potential vanilloid 1) receptor in an experimental mouse model of allergic airway infl...
journal_title:European journal of pharmacology
pub_type: 杂志文章
doi:10.1016/j.ejphar.2011.04.027
更新日期:2011-07-15 00:00:00
abstract::Apoptosis has received widespread attention for its essential roles in biology, medicine and cancer. We previously found that normal, human papillomavirus (HPV) 16-immortalized and their transformed endocervical cells were increasingly resistant to apoptosis induced by a cancer therapeutic drug. Here, analogously, ano...
journal_title:European journal of pharmacology
pub_type: 杂志文章
doi:10.1016/s0014-2999(03)01561-9
更新日期:2003-04-25 00:00:00
abstract::The effects of amiloride on contraction evoked by perivascular nerve stimulation were studied in a ring preparation of rat mesenteric artery. The contraction evoked by nerve stimulation was abolished by tetrodotoxin or prazosin. Amiloride depressed the nerve-induced contraction concentration dependently. Noradrenaline...
journal_title:European journal of pharmacology
pub_type: 杂志文章
doi:10.1016/s0014-2999(96)00879-5
更新日期:1997-02-05 00:00:00
abstract::The purpose of this study was to elucidate the role of human organic anion transporters (human OATs) in the induction of drug-induced skeletal muscle abnormalities. 3-Hydroxy-3-methylglutaryl-coenzyme A (HMG-CoA) reductase inhibitors have been clinically used for lowering plasma cholesterol levels, and are known to in...
journal_title:European journal of pharmacology
pub_type: 杂志文章
doi:10.1016/j.ejphar.2003.10.017
更新日期:2004-01-12 00:00:00
abstract::We have characterized the tachykinin NK(2) receptor-mediated contraction and vectorial ion transport responses in the muscularis mucosae and mucosa of the rat isolated distal colon, respectively. The tachykinin NK(2) receptor-selective antagonist nepadutant (c([(beta-D-GlcNAc)Asn-Asp-Trp-Phe-Dpr-Leu]c(2beta-5beta))) p...
journal_title:European journal of pharmacology
pub_type: 杂志文章
doi:10.1016/s0014-2999(01)00836-6
更新日期:2001-03-01 00:00:00
abstract::Molecular identification of two new transient receptor potential (TRP) channels, TRPM8 and TRPA1, has prompted an intense interest in their functional roles. We report that an acute exposure to the TRPM8/TRPA1 agonist icilin (0.01-100 microM), but not TRPV1 agonist capsaicin (10 microM), causes an atypical dose-relate...
journal_title:European journal of pharmacology
pub_type: 杂志文章
doi:10.1016/j.ejphar.2007.07.060
更新日期:2007-12-01 00:00:00
abstract::The effect of Bay K 8644 on contractile responses to angiotensin II (AII) was investigated in rabbit aorta. Bay K 8644 alone did not elicit contraction while contractile responses to AII were enhanced at low concentrations (10(-8), 3 X 10(-8), 10(-7) M) and depressed at a higher concentration (10(-6) M). The potentiat...
journal_title:European journal of pharmacology
pub_type: 杂志文章
doi:10.1016/0014-2999(86)90755-7
更新日期:1986-07-15 00:00:00
abstract::We have reported previously that ugonin K, a flavonoid isolated from Helminthostachys zeylanica (L.) Hook, potently induces cell differentiation and mineralization of MC3T3-E1 mouse osteoblast-like cells. Here we aimed to elucidate whether ugonin K evoked osteogenesis required interaction with estrogen receptor. Resul...
journal_title:European journal of pharmacology
pub_type: 杂志文章
doi:10.1016/j.ejphar.2011.12.001
更新日期:2012-02-15 00:00:00
abstract::Quick stretching of a helical strip of dog basilar artery at a rate of 10 cm/s to 140% of the slack length of the muscle evoked a delayed contraction. A small amount of hemolysate (0.01-0.2 mg/ml as hemoglobin), which increased the basal tone by 10-15% of the maximum contracture produced by 80 mM K+, potentiated the s...
journal_title:European journal of pharmacology
pub_type: 杂志文章
doi:10.1016/0014-2999(89)90814-5
更新日期:1989-10-04 00:00:00
abstract::YM992 ((S)-2-[[(7-fluoro-4-indanyl)oxy]methyl]morpholine monohydrochloride) is a novel compound that has selective serotonin (5-hydroxytryptamine, 5-HT) re-uptake inhibition and 5-HT2A receptor antagonistic activity in vivo. YM992, fluoxetine and citalopram showed 5-HT uptake inhibition activity in l-5-hydroxy-tryptop...
journal_title:European journal of pharmacology
pub_type: 杂志文章
doi:10.1016/s0014-2999(97)10108-x
更新日期:1997-06-18 00:00:00
abstract::There is a large body of evidence to suggest that the sympathetic nervous system plays a critical role in the development of hypertension and vascular medial hypertrophy in the spontaneously hypertensive rat (SHR). The synthesis of a water soluble, specific alpha 1-adrenoceptor antagonist (terazosin) has permitted an ...
journal_title:European journal of pharmacology
pub_type: 杂志文章
doi:10.1016/0014-2999(92)90538-f
更新日期:1992-02-11 00:00:00
abstract::Dextromethorphan which is an active ingredient in many cough medicines has been previously shown to potentiate amnesic effect of morphine in rats. However, the effect of dextromethorphan, that is also a noncompetitive N-methyl-D-aspartate (NMDA) receptor antagonist, in combination with morphine on hippocampus-based lo...
journal_title:European journal of pharmacology
pub_type: 杂志文章
doi:10.1016/j.ejphar.2016.11.025
更新日期:2017-01-05 00:00:00
abstract::The effects of a highly selective kappa antagonist, nor-binaltorphimine (nor-BNI), on the development of tolerance to morphine analgesia and physical dependence on morphine were examined. Pretreatment with nor-BNI (5 mg/kg s.c.) 2 h prior to injection of morphine or a selective kappa agonist, U-50,488H, significantly ...
journal_title:European journal of pharmacology
pub_type: 杂志文章
doi:10.1016/0014-2999(92)90237-x
更新日期:1992-03-17 00:00:00
abstract::Calcitonin can selectively modulate the effects of opioids on the rat hypothalamic-pituitary-adrenal axis and increase the release of corticosterone induced by a kappa-opioid receptor agonist. Considerable evidence supports the involvement of opioid and serotonergic systems in the analgesic effect of calcitonin. In th...
journal_title:European journal of pharmacology
pub_type: 杂志文章
doi:10.1016/s0014-2999(97)01355-1
更新日期:1997-12-04 00:00:00
abstract::In this study, we describe the effect of antiepileptic drugs on the production of kynurenic acid in rat cortical slices, and on the activity of kynurenic acid biosynthetic enzymes, kynurenine aminotransferases (KATs I and II) in the brain tissue. Phenobarbital, felbamate, phenytoin and lamotrigine (all at 0.5-3.0 mM) ...
journal_title:European journal of pharmacology
pub_type: 杂志文章
doi:10.1016/j.ejphar.2006.05.015
更新日期:2006-07-17 00:00:00
abstract::Acanthoic acid, a pimaradiene diterpene isolated from Acanthopanax koreanum, has been reported to have anti-inflammatory activities. However, the effects of acanthoic acid on LPS-induced acute lung injury have not been reported. The purpose of this study was to investigate the protective effect of acanthoic acid on LP...
journal_title:European journal of pharmacology
pub_type: 杂志文章
doi:10.1016/j.ejphar.2015.01.023
更新日期:2015-03-05 00:00:00
abstract::Prevention and restoration of hepatic fibrosis from chronic liver injury is essential for the treatment of patients with chronic liver diseases. Vitamin C is known to have hepatoprotective effects, but their underlying mechanisms are unclear, especially those associated with hepatic fibrosis. Here, we analyzed the imp...
journal_title:European journal of pharmacology
pub_type: 杂志文章
doi:10.1016/j.ejphar.2015.06.008
更新日期:2015-09-05 00:00:00
abstract::Oxidative stress is recognized as an important factor in the development of liver pathologies. The reactive oxygen species endogenously generated or as a consequence of xenobiotic metabolism are eliminated by enzymatic and nonenzymatic cellular systems. Besides endogen defences, the antioxidant consumption in the diet...
journal_title:European journal of pharmacology
pub_type: 杂志文章
doi:10.1016/j.ejphar.2008.06.067
更新日期:2008-09-04 00:00:00
abstract::The inhibitors of advanced glycation endproduct and oxidative stress, as well as N-methyl-d-aspartate (NMDA) receptor antagonists have received considerable interest because of their close association with renoprotective effects. The therapeutic potential of 20(S)-ginsenoside Rg(3) (20(S)-Rg(3)), isolated from Panax g...
journal_title:European journal of pharmacology
pub_type: 杂志文章
doi:10.1016/j.ejphar.2008.06.077
更新日期:2008-09-04 00:00:00
abstract::Observations of sigma (sigma) receptor heterogeneity have prompted interest in identifying ligands for sigma receptor subtypes. Selective ligands for the sigma-2 are unavailable, but [3H]ifenprodil labels sigma-2 sites. Therefore, isomers and analogues of ifenprodil were compared as potential sigma-2 ligands. Threo-if...
journal_title:European journal of pharmacology
pub_type: 杂志文章
doi:10.1016/0014-2999(94)00763-w
更新日期:1995-02-06 00:00:00
abstract::Opiates depress the potassium-induced efflux of [3H]noradrenaline from the mouse vas deferens in a concentration-dependent (the IC50 for normorphine was 1.5 microM), stereospecific and naloxone-reversible manner. As the concentration of sodium in the extracellular fluid was reduced, the inhibitory action of opiates wa...
journal_title:European journal of pharmacology
pub_type: 杂志文章
doi:10.1016/0014-2999(81)90354-x
更新日期:1981-04-09 00:00:00
abstract::The antifibrillatory and electrophysiologic actions of bepridil and butyl-methylenedioxyindene (BU-MDI), two intracellular calcium antagonists, were examined in anesthetized dogs. The administration of bepridil (1.0-10.0 mg/kg i.v.) significantly increased the electrical threshold for ventricular fibrillation determin...
journal_title:European journal of pharmacology
pub_type: 杂志文章
doi:10.1016/0014-2999(85)90107-4
更新日期:1985-04-23 00:00:00
abstract::In clinical practice, patients with epilepsy are frequently associated with psychiatric disorders, including cognitive impairment, depression, and attention deficit hyperactivity disorder. In fact, patients with epilepsy often take centrally acting drugs, such as antidepressants and anxiolytics; however, it remains un...
journal_title:European journal of pharmacology
pub_type: 杂志文章
doi:10.1016/j.ejphar.2011.10.017
更新日期:2011-12-30 00:00:00
abstract::Inhibition of glutamate carboxypeptidase (GCP) II (EC 3.4.17.21), also termed N-acetylated alpha-linked acidic dipeptidase (NAALADase), has been shown to protect against ischemic injury presumably via decreasing glutamate and increasing N-acetyl-aspartyl-glutamate (NAAG). NAAG is a potent and selective mGlu3 receptor ...
journal_title:European journal of pharmacology
pub_type: 杂志文章
doi:10.1016/s0014-2999(01)01239-0
更新日期:2001-10-26 00:00:00