Abstract:
:The association of G-proteins with the T-cell-specific receptor structures CD3 and CD2 was investigated. High-affinity GTPase activity in membrane preparations of the human leukemic T-cell line Jurkat could be induced by the monoclonal antibodies OKT3 (anti-CD3) and OKT11 (anti-CD2). When combining maximally active concentrations of OKT3 and OKT11, no additive effect was seen on GTPase activity. In mutant Jurkat cells lacking the CD3 complex but with an intact CD2 receptor, neither OKT3 nor OKT11 could stimulate GTPase activity. Activation of CD3 and CD2 by monoclonal antibodies also stimulated phospholipase C activity as measured by breakdown of membrane phosphoinositides in wild-type but not in mutant Jurkat cells. Neither GTPase nor phospholipase C activation was sensitive to pretreatment with doses of pertussis toxin (PTX) that caused ADP ribosylation of a sensitive G-protein. Our data show that the CD3 complex and the CD2 receptor may activate a common PTX-insensitive G-protein. The CD2 receptor appears to stimulate the G-protein by interacting with the CD3 complex. The data are compatible with, but do not prove, that this G-protein is involved in the activation of phospholipase C by the two receptors.
journal_name
Eur J Pharmacoljournal_title
European journal of pharmacologyauthors
Kvanta A,Gerwins P,van der Ploeg I,Nordstedt C,Jondal M,Fredholm BBdoi
10.1016/0922-4106(90)90033-tsubject
Has Abstractpub_date
1990-12-15 00:00:00pages
363-72issue
6eissn
0014-2999issn
1879-0712journal_volume
189pub_type
杂志文章abstract::The role of tuberoinfundibular and periventricular-hypophysial dopaminergic neurons in mediating rimcazole-induced decreases in plasma concentrations of prolactin and alpha-melanocyte stimulating hormone was assessed. Dopaminergic neuronal activity was estimated by measuring concentrations of 3,4-dihydroxyphenylacetic...
journal_title:European journal of pharmacology
pub_type: 杂志文章
doi:10.1016/0014-2999(95)00841-1
更新日期:1996-03-28 00:00:00
abstract::Vascular smooth muscle cells in culture are capable of secreting endothelin which is a vasoconstrictor and mitogenic peptide. The effect of glucocorticoids on endothelin release from vascular smooth muscle cells of the rat and rabbit aortas was investigated. Micromolar concentrations of dexamethasone and cortisol caus...
journal_title:European journal of pharmacology
pub_type: 杂志文章
doi:10.1016/0014-2999(91)90641-3
更新日期:1991-06-18 00:00:00
abstract::KDR-5169, 4-amino-5-chloro-N-[1-(3-fluoro-4-methoxybenzyl)piperidin-4-yl]-2-(2-hydroxyethoxy)benzamide hydrochloride dihydrate, is a new prokinetic with a dual action, i.e., stimulation of the 5-HT4 receptor and antagonism of the dopamine D2 receptor. In this study, we determined in vitro activities of KDR-5169 toward...
journal_title:European journal of pharmacology
pub_type: 杂志文章
doi:10.1016/s0014-2999(01)01543-6
更新日期:2002-01-11 00:00:00
abstract::In the present report, we studied the distribution of the imidazoline-guanidinium receptive site in mitochondrial fractions from different rabbit and human tissues. Binding studies of the imidazoline-guanidinium receptive site ligand [3H]idazoxan, allowed to distinguish two groups of tissues: the first one, including ...
journal_title:European journal of pharmacology
pub_type: 杂志文章
doi:10.1016/0014-2999(92)90316-v
更新日期:1992-08-25 00:00:00
abstract::The intravenous infusion of catecholamines to rats induced a dose dependent increase of immunoreactive beta-endorphin (beta-Endi) in plasma. The ED50 values of 1-epinephrine and 1-isoproterenol were 110 and 100 ng/kg X min respectively. 1-Propranolol, but not d-propranolol prevented the effect of 1-epinephrine. Infusi...
journal_title:European journal of pharmacology
pub_type: 杂志文章
doi:10.1016/0014-2999(81)90303-4
更新日期:1981-06-10 00:00:00
abstract::The structure-activity relationships of 35 novel derivatives of 2-(carboxypropyl)-3-amino-4-methyl-6-phenyl pyridazine (SR 95103) were examined as gamma-aminobutyric acid (GABA) antagonists in the flap preparation of the parasitic nematode, Ascaris suum, using a two-microelectrode current-clamp technique. All but one ...
journal_title:European journal of pharmacology
pub_type: 杂志文章
doi:10.1016/0014-2999(94)00778-6
更新日期:1995-03-24 00:00:00
abstract::Using the radioactive microsphere technique in anaesthetized pigs, we studied the systemic and carotid haemodynamic effects of intracarotid infusions (0.3, 1, 3 and 10 micrograms/kg.min) of 5-methoxy-3-(1,2,3,6-tetrahydro-4-pyridinyl)-1H-indole succinate (RU 24969), a drug with high affinity for 5-HT1A and 5-HT1B reco...
journal_title:European journal of pharmacology
pub_type: 杂志文章
doi:10.1016/0014-2999(89)90432-9
更新日期:1989-11-14 00:00:00
abstract::In the sheep cerebral vasculature 5-hydroxytryptamine (5-HT) caused a contraction of which ketanserin was found to be an effective antagonist (Basilar artery, pA2 = 9.33 +/- 0.16; middle cerebral artery, pA2 = 9.19 +/- 0.16; pial artery, pA2 = 9.47 +/- 0.12). Sumatriptan (GR 43175), a selective 5-HT1-like receptor ago...
journal_title:European journal of pharmacology
pub_type: 杂志文章
doi:10.1016/0014-2999(90)90399-q
更新日期:1990-04-10 00:00:00
abstract::Cytokines and cytokine-induced nitric oxide (NO) play important roles in inflammatory glomerular diseases, and both platelet-derived growth factor and transforming growth factor-beta inhibit cytokine-induced NO production. In this study, we demonstrated that a selective endothelin ET(A) receptor antagonist, BQ-485 (He...
journal_title:European journal of pharmacology
pub_type: 杂志文章
doi:10.1016/s0014-2999(98)00849-8
更新日期:1999-01-15 00:00:00
abstract::Infusion of α,β-methylene ATP (α,β-meATP) into murine neck muscle facilitates brainstem nociception. This animal experimental model is suggested to be appropriate for investigating pathophysiological mechanisms in tension-type headache. It was hypothesized that d-lysine acetylsalicylic acid (ASA, aspirin®) reverses th...
journal_title:European journal of pharmacology
pub_type: 杂志文章
doi:10.1016/j.ejphar.2011.10.008
更新日期:2011-12-30 00:00:00
abstract::PCA 50941 is a novel 1,4-dihydropyridine derivative. Its vasoconstricting effects prompted a systematic comparison with the prototypic Ca2+ channel activator, Bay K 8644. The two compounds exhibit marked analogies and differences in their cardiovascular profiles. PCA 50941 exhibits a pronounced vascular over cardiac s...
journal_title:European journal of pharmacology
pub_type: 杂志文章
doi:10.1016/0014-2999(93)90163-c
更新日期:1993-10-12 00:00:00
abstract::The growth in height of the bone plate is a result of endochondral proliferation in epiphyseal growth plates and the conversion of chondrocytes into new bone. The control of chondrogenic differentiation and hypertrophy is critical for these processes. The present study was aimed to demonstrate the chondromodulating ac...
journal_title:European journal of pharmacology
pub_type: 杂志文章
doi:10.1016/j.ejphar.2011.01.012
更新日期:2011-03-25 00:00:00
abstract::In isolated guinea pig bronchi, the influence of ruthenium red, capsazepine and extracellular Ca2+ on capsaicin-induced desensitization was examined to investigate whether this desensitization was mediated via a specific receptor coupled with an ion channel. Pre-exposure of tissues to capsaicin (1, 3 or 10 microM) cau...
journal_title:European journal of pharmacology
pub_type: 杂志文章
doi:10.1016/s0014-2999(98)00786-9
更新日期:1998-12-04 00:00:00
abstract::The effects of rat calcitonin gene-related peptide (CGRP) on superfused rat aortic smooth muscle cells in cell culture were investigated. Exposure of the cells for 10 min to CGRP (10(-7) M), with or without pretreatment with pertussis toxin, stimulated the release of cyclic AMP but not of prostacyclin, as judged by ra...
journal_title:European journal of pharmacology
pub_type: 杂志文章
doi:10.1016/0014-2999(89)90062-9
更新日期:1989-07-18 00:00:00
abstract::The effect of KC 2450 (racemic 3,5-cis-3-methylamino-2,3,4,5-tetrahydro-1-benzoxepine-5-ol hydrochloride) on lower esophageal sphincter pressure in pentobarbital-anesthetized dogs was determined and compared to the effect of metoclopramide. The ED20 value (i.e. the dose that increased lower esophageal sphincter pressu...
journal_title:European journal of pharmacology
pub_type: 杂志文章
doi:10.1016/0014-2999(87)90111-7
更新日期:1987-10-13 00:00:00
abstract::The zero-trans influx of uridine in human erythrocytes is inhibited by lidoflazine and analogs thereof. The concentrations required for inhibition of nucleoside transport were higher when the compounds were simultaneously added with uridine than upon preincubation of the inhibitors with the erythrocytes. R70380 proved...
journal_title:European journal of pharmacology
pub_type: 杂志文章
doi:10.1016/0922-4106(90)90040-5
更新日期:1990-12-15 00:00:00
abstract::The aim of the present study was to determine the effect of a calcium channel blocker on renal function, urinary endothelin excretion and endothelin receptor number in rats. Administration of cyclosporine resulted in a significant impairment of renal function when measured by either [14C]inulin or 24 h creatinine clea...
journal_title:European journal of pharmacology
pub_type: 杂志文章
doi:10.1016/0014-2999(91)90132-a
更新日期:1991-02-26 00:00:00
abstract::The biodistribution of S-(-)-4-(2-hydroxy-3-(1'-[18F]fluoroisopropyl)- aminopropoxy)carbazole ([18F]S-fluorocarazolol, a non-selective beta-adrenoceptor antagonist) was studied in rats (60 min after 18F injection when specific binding in peripheral organs was maximal). 18F uptake in brain, erythrocytes, heart and lung...
journal_title:European journal of pharmacology
pub_type: 杂志文章
doi:10.1016/0014-2999(94)00636-l
更新日期:1995-01-16 00:00:00
abstract::Knockdown of spinal metabotropic glutamate 5 (mGlu5) receptor was shown to inhibit the development of intrathecal morphine antinociceptive tolerance. The present work was designed to evaluate the expression of spinal G-protein during morphine tolerance and knockdown of spinal mGlu5 receptor with antisense oligonucleot...
journal_title:European journal of pharmacology
pub_type: 杂志文章
doi:10.1016/j.ejphar.2013.11.024
更新日期:2014-01-15 00:00:00
abstract::Mitomycin C (MMC) is known to reduce epidural fibrosis, but the underlying mechanisms have not yet been elucidated. Aberrant miR-200b expressions have been reported in multiple types of fibrotic tissues from many diseases. The aim of this study was to clarify the mechanism by which MMC induces fibroblasts apoptosis an...
journal_title:European journal of pharmacology
pub_type: 杂志文章
doi:10.1016/j.ejphar.2015.08.002
更新日期:2015-10-15 00:00:00
abstract::In voltage-clamp experiments with the myelinated nerve fibre of Xenopus laevis, 9-amino-1,2,3,4-tetrahydroacridine (THA) decreased both Na+ and K+ currents and shifted the steady state inactivation potential curve in a negative direction. The effects may be described as (a) a decrease of the permeability constant PNa,...
journal_title:European journal of pharmacology
pub_type: 杂志文章
doi:10.1016/0014-2999(89)90272-0
更新日期:1989-05-30 00:00:00
abstract::(-)-Trans-epsilon-viniferin (epsilon-viniferin, 5-200 microM), a dimer of resveratrol, concentration-dependently inhibited the uptake of [3H]noradrenaline and [3H]5-HT by synaptosomes from rat brain (being slightly but significantly more selective against [3H]noradrenaline) and the uptake of [3H]5-HT by human platelet...
journal_title:European journal of pharmacology
pub_type: 杂志文章
doi:10.1016/j.ejphar.2006.06.005
更新日期:2006-08-07 00:00:00
abstract::The effects of GABA on depolarization-induced (26 mM K+) release of radiolabeled dopamine (DA) and acetylcholine (ACh) from slices of rat caudate nucleus were examined with a superfusion method. GABA, in concentrations of 10(-5)--10(-3) M, dose-dependently enhanced the release of DA, either accumulated by high-affinit...
journal_title:European journal of pharmacology
pub_type: 杂志文章
doi:10.1016/0014-2999(79)90101-8
更新日期:1979-07-15 00:00:00
abstract::Histamine, 4-methylhistamine and dimaprit induced a dose-dependent increase in the cyclic AMP content of chopped canine parotid gland in the presence of 3-isobutyl-1-methylxanthine. Metiamide, but not mepyramine, inhibited the effect of these agonists dose-dependently. The cyclic AMP content was also increased by 2-(2...
journal_title:European journal of pharmacology
pub_type: 杂志文章
doi:10.1016/0014-2999(81)90101-1
更新日期:1981-12-17 00:00:00
abstract::Translational research for neurodegenerative disease depends intimately upon animal models. Unfortunately, promising therapies developed using mouse models mostly fail in clinical trials, highlighting uncertainty about how well mouse models mimic human neurodegenerative disease at the molecular level. We compared the ...
journal_title:European journal of pharmacology
pub_type: 杂志文章
doi:10.1016/j.ejphar.2015.03.021
更新日期:2015-07-15 00:00:00
abstract::The mechanisms of ryanodine-induced contractions were studied in strips of femoral arteries from spontaneously hypertensive rats (SHR) and normotensive Wistar-Kyoto rats (WKY). Ryanodine (30 nM to 30 microM) alone contracted arterial strips in a dose-dependent manner. The maximum contraction in SHR was about 5 times g...
journal_title:European journal of pharmacology
pub_type: 杂志文章
doi:10.1016/0014-2999(94)90383-2
更新日期:1994-03-11 00:00:00
abstract::The composition of final submaxillary saliva and of whole gland homogenates were compared in rats treated with 14 daily doses of guanethidine (20 mg/kg body weight) and in untreated controls after stimulation with pilocarpine (10 mg/kg) or carbamylcholine (50-100 mg/kg). A 44% reduction in the volume of saliva and ele...
journal_title:European journal of pharmacology
pub_type: 杂志文章
doi:10.1016/0014-2999(77)90200-x
更新日期:1977-01-21 00:00:00
abstract::The anticonvulsant activity of 1-methyl-1,2,3,4-tetrahydroisoquinoline (MeTHIQ--an endogenous parkinsonism-preventing substance) administered alone and in combination with four conventional antiepileptic drugs (carbamazepine, phenytoin, phenobarbital and valproate) was determined in the mouse maximal electroshock-indu...
journal_title:European journal of pharmacology
pub_type: 杂志文章
doi:10.1016/j.ejphar.2008.11.049
更新日期:2009-01-14 00:00:00
abstract::Clomipramine is a tricyclic antidepressant for psychiatric disorders that can induce QT prolongation, which may lead to torsades de pointes. Since blockade of cardiac human ether-a-go-go-related gene (hERG) channels is an important cause of acquired long QT syndrome, we investigated the acute effects of clomipramine o...
journal_title:European journal of pharmacology
pub_type: 杂志文章
doi:10.1016/j.ejphar.2008.06.094
更新日期:2008-09-11 00:00:00
abstract::Endothelium injury is a primary event in atherogenesis, which is followed by monocyte infiltration, macrophage differentiation, and smooth muscle cell migration. Peroxisome proliferator-activated receptors (PPARs) are transcription factors now recognized as important mediators in the inflammatory response. The aim of ...
journal_title:European journal of pharmacology
pub_type: 杂志文章
doi:10.1016/s0014-2999(01)01589-8
更新日期:2002-01-25 00:00:00