Receptors for neurotransmitters in opossum oesophagus muscularis mucosa.

abstract：:1. A series of 5-hydroxytryptamine (5-HT) receptor agonists including 5-HT, 5-carboxamidotryptamine (5-CT) and sumatriptan produced little or no contraction of rabbit isolated mesenteric arteries under resting tone conditions, even at concentrations up to 10(-4) M. 2. When the same agonists were retested in mesenteric...

journal_title：British journal of pharmacology

authors： Choppin A,O'Connor SE

更新日期：1995-01-01 00:00:00

abstract：:1. Increased calcium (Ca2+) influx has been incriminated as a potential pathological mechanism in the chronic skeletal muscle degeneration exhibited by Duchenne muscular dystrophy (DMD) patients. We have studied the influence of the glucocorticoid alpha-methylprednisolone (PDN), the only drug known to have a beneficia...

journal_title：British journal of pharmacology

authors： Metzinger L,Passaquin AC,Leijendekker WJ,Poindron P,Rüegg UT

更新日期：1995-12-01 00:00:00

abstract：:1. The mechanisms of action of semotiadil fumarate, a novel Ca2+ antagonist, were examined by measuring the cytosolic Ca2+ level ([Ca2+]i) and force of contraction in porcine coronary arteries, and by determining [3H]-pyrilamine binding to bovine cerebellar membranes. 2. Semotiadil or verapamil (0.1 and 1 microM) inhi...

journal_title：British journal of pharmacology

authors： Kageyama M,Yanagisawa T,Taira N

更新日期：1995-03-01 00:00:00

abstract：BACKGROUND AND PURPOSE:Volume-regulated anion channels (VRACs) play an important role in cell-volume regulation. alpha(1)-Adrenoceptor stimulation by phenylephrine (PE) suppressed the hypotonic activation of VRAC current in mouse ventricular cells and regulatory volume decrease (RVD) was also absent in PE-treated cells...

journal_title：British journal of pharmacology

authors： Ichishima K,Yamamoto S,Iwamoto T,Ehara T

更新日期：2010-09-01 00:00:00

abstract：BACKGROUND AND PURPOSE:Uridine 5'-triphosphate (UTP) is a potent vasoconstrictor of cerebral arteries and induces Ca(2+) waves in vascular smooth muscle cells (VSMCs). This study aimed to determine the mechanisms underlying UTP-induced Ca(2+) waves in VSMCs of the rat basilar artery. EXPERIMENTAL APPROACH:Isometric fo...

journal_title：British journal of pharmacology

authors： Syyong HT,Yang HH,Trinh G,Cheung C,Kuo KH,van Breemen C

更新日期：2009-02-01 00:00:00

abstract：BACKGROUND AND PURPOSE:N-arachidonyl dopamine (NADA) has been identified as a putative endocannabinoid, but there is little information about which signalling pathways it activates. The purpose of this study was to identify the signalling pathways activated by NADA in vitro. EXPERIMENTAL APPROACH:Human or rat cannabin...

journal_title：British journal of pharmacology

authors： Redmond WJ,Cawston EE,Grimsey NL,Stuart J,Edington AR,Glass M,Connor M

更新日期：2016-01-01 00:00:00

abstract：BACKGROUND AND PURPOSE:Combretastatin A-4 3-O-phosphate (CA4P) is in clinical trial as a tumour vascular disrupting agent (VDA) but the cause of blood flow disruption is unclear. We tested the hypothesis that activation of Rho/Rho kinase (ROCK) is fundamental to the effects of this drug in vivo. EXPERIMENTAL APPROACH:...

journal_title：British journal of pharmacology

authors： Williams LJ,Mukherjee D,Fisher M,Reyes-Aldasoro CC,Akerman S,Kanthou C,Tozer GM

更新日期：2014-11-01 00:00:00

abstract：BACKGROUND AND PURPOSE:The human, rat, and mouse P2X(7) receptors have been previously characterized, and in this study we report the cloning and pharmacological properties of the guinea pig orthologue. EXPERIMENTAL APPROACH:A cDNA encoding for the guinea pig P2X(7) receptor was isolated from a guinea pig brain librar...

journal_title：British journal of pharmacology

authors： Fonfria E,Clay WC,Levy DS,Goodwin JA,Roman S,Smith GD,Condreay JP,Michel AD

更新日期：2008-02-01 00:00:00

abstract：:Extracellular nucleotides can activate a common purinoceptor mediating various cell responses. In this study we report that stimulation of rat mesangial cells with ATP and UTP leads to a rapid activation of the protein kinase B/Akt (PKB) pathway. Time-course studies reveal a rapid and transient phosphorylation of both...

journal_title：British journal of pharmacology

authors： Huwiler A,Rölz W,Dorsch S,Ren S,Pfeilschifter J

更新日期：2002-06-01 00:00:00

abstract：:1. The diversity of alpha(2) and purinergic autoreceptor actions on action potential evoked calcium transients in single varicosities has been investigated using the calcium indicator Oregon Green 488 BAPTA-1. 2. During long trains of impulses (10 Hz for 30 s), the change in calcium concentration in varicosities from ...

journal_title：British journal of pharmacology

authors： O'Connor SC,Brain KL,Bennett MR

更新日期：1999-12-01 00:00:00

abstract：:1. The influence of angiotensin II (AII) on resting blood pressure and on sympathetic nerve-mediated pressor responses in the pithed rat was investigated either by inhibiting the renin-angiotensin system or by infusing AII. 2. Plasma AII levels in the pithed rat were approximately 20 fold higher than in normotensive r...

journal_title：British journal of pharmacology

authors： Grant TL,McGrath JC

更新日期：1988-12-01 00:00:00

abstract：:1. The 5-hydroxytryptamine (5-HT)-receptor subtype and affinity for 5-HT was determined in large and small coronary arteries isolated as ring segments from the proximal and distal part of the left coronary artery of 3 month (young) and 2-year old (old) rats. 2. Ketanserin induced a rightward shift of the 5-HT concentr...

journal_title：British journal of pharmacology

authors： Nyborg NC

更新日期：1991-01-01 00:00:00

abstract：:We have performed a systematic mutagenesis of three hydrophobic rings (17', 13' and 9') within transmembrane region (TM) 2 of the alpha9alpha10 nicotinic cholinergic receptor (nAChR) to a hydrophilic (threonine) residue and compared the properties of mutant receptors reconstituted in Xenopus laevis oocytes. Phenotypic...

journal_title：British journal of pharmacology

authors： Plazas PV,De Rosa MJ,Gomez-Casati ME,Verbitsky M,Weisstaub N,Katz E,Bouzat C,Elgoyhen AB

更新日期：2005-08-01 00:00:00

abstract：:1. The sinus node inhibitors UL FS 49 and DK-AH 269 reduce heart rate by slowing diastolic depolarization rate in the sino-atrial (SA) node, which might originate from the use-dependent blockade of a hyperpolarization-activated current If. A hyperpolarization-activated current Ih, which is present in many types of neu...

journal_title：British journal of pharmacology

authors： Raes A,Van de Vijver G,Goethals M,van Bogaert PP

更新日期：1998-10-01 00:00:00

abstract：:1. The pharmacokinetic interaction between phenylbutazone and sulphadoxine has been studied in live sheep.2. Intravenous injection of phenylbutazone causes a rapid fall in the concentration of total sulphadoxine together with a simultaneous rise in the concentration of free sulphadoxine in plasma. Both processes are c...

journal_title：British journal of pharmacology

authors： McQueen EG,Wardell WM

更新日期：1971-10-01 00:00:00

abstract：:We have shown earlier that activation of metabotropic glutamate (mGlu) receptors using a group I-specific mGlu receptor agonist, (RS)-3,5-dihydroxyphenylglycine (DHPG), can induce long-term depression (LTD) in the CA1 region of the hippocampus. In an attempt to determine the signal transduction mechanisms involved in ...

journal_title：British journal of pharmacology

authors： Schnabel R,Kilpatrick IC,Collingridge GL

更新日期：2001-03-01 00:00:00

abstract：BACKGROUND AND PURPOSE:There is increasing evidence that not only the monoaminergic but also the glutamatergic system is involved in the pathophysiology of attention-deficit hyperactivity disorder (ADHD). Hyperactivity of glutamate metabolism might be causally related to a hypoactive state in the dopaminergic system. A...

journal_title：British journal of pharmacology

authors： Ludolph AG,Udvardi PT,Schaz U,Henes C,Adolph O,Weigt HU,Fegert JM,Boeckers TM,Föhr KJ

更新日期：2010-05-01 00:00:00

abstract：:Strips of human pulmonary arteries from patients undergoing surgery for lung tumour were incubated with [3H]-noradrenaline. Subsequently, they were superfused with physiological salt solution containing cocaine and corticosterone. Tritium overflow from the strips was stimulated by transmural electrical impulses (2 Hz)...

journal_title：British journal of pharmacology

authors： Göthert M,Hentrich F

更新日期：1985-08-01 00:00:00

abstract：BACKGROUND AND PURPOSE:We have previously shown that lipid mediators, produced by phospholipase D and C, are generated in OX(1) orexin receptor signalling with high potency, and presumably mediate some of the physiological responses to orexin. In this study, we investigated whether the ubiquitous phospholipase A(2) (PL...

journal_title：British journal of pharmacology

authors： Turunen PM,Ekholm ME,Somerharju P,Kukkonen JP

更新日期：2010-01-01 00:00:00

abstract：:1. We have examined the mechanisms by which the K(+)-channel blocker 4-aminopyridine (4-AP) can dose-dependently increase both basal [3H]-noradrenaline ([3H]-NA) release and the [3H]-NA release evoked by electrical stimulation, but not the release of [3H]-acetylcholine ([3H]-ACh), from slices of rat hippocampus. 2. Bo...

journal_title：British journal of pharmacology

authors： Hu PS,Fredholm BB

更新日期：1991-03-01 00:00:00

abstract：:AM-36 is a novel neuroprotective agent incorporating both antioxidant and Na(+) channel blocking actions. In cerebral ischaemia, loss of cellular ion homeostasis due to Na(+) channel activation, together with increased reactive oxygen species (ROS) production, are thought to contribute to neuronal death. Since neurona...

journal_title：British journal of pharmacology

authors： Callaway JK,Beart PM,Jarrott B,Giardina SF

更新日期：2001-04-01 00:00:00

abstract：BACKGROUND AND PURPOSE:The aim of the present study was to assess the interaction of nitrergic neurotransmission within the bed nucleus of the stria terminalis (BNST) with local glutamatergic and noradrenergic neurotransmission in the control of cardiovascular responses to acute restraint stress in rats. EXPERIMENTAL ...

journal_title：British journal of pharmacology

authors： Barretto-de-Souza L,Adami MB,Benini R,Crestani CC

更新日期：2018-10-01 00:00:00

abstract：:1. Imidazoline binding sites have been reported to be present in the locus coeruleus (LC). To investigate the role of these sites in the control of LC neuron activity, we studied the effect of imidazolines using in vivo and in vitro single-unit extracellular recording techniques. 2. In anaesthetized rats, local (27 pm...

journal_title：British journal of pharmacology

authors： Ugedo L,Pineda J,Ruiz-Ortega JA,Martín-Ruiz R

更新日期：1998-12-01 00:00:00

abstract：:The kallikrein-kinin system is subdivided into the plasma and tissue-kallikrein-kinin system, with bradykinin (BK) and kallidin (KAL) (Lys(0)-bradykinin) as functional peptides. This occurs in both humans and other mammals. Both peptides are released by plasma and tissue-kallikrein. BK, but not KAL, has been detected ...

journal_title：British journal of pharmacology

authors： Hilgenfeldt U,Stannek C,Lukasova M,Schnölzer M,Lewicka S

更新日期：2005-12-01 00:00:00

abstract：:1. The alpha(1)-adrenoceptor antagonist properties of the beta-adrenoceptor nonconventional partial agonist, CGP 12177A, was investigated in functional assays in rat aorta and in radioligand binding assays in rat cerebral cortical membranes. In addition, binding affinities of other beta-adrenoceptor ligands were measu...

journal_title：British journal of pharmacology

authors： Brahmadevara N,Shaw AM,MacDonald A

更新日期：2004-06-01 00:00:00

abstract：:The effect of activation of protein kinase C (PKC) or adenylyl cyclase on release of glutamate has been investigated in a perfused slice preparation from the rat caudal trigeminal nucleus. Stimulation of PKC by phorbol 12-myristate 13-acetate (PMA) produced a concentration-dependent increase in K(+)-evoked release of ...

journal_title：British journal of pharmacology

authors： Maneuf YP,McKnight AT

更新日期：2001-09-01 00:00:00

abstract：:1. The binding of 2-[125I]-iodomelatonin to chicken brain membranes, and the inhibition of binding by melatonin, N-acetyltryptamine and luzindole, were examined at temperatures between 4 degrees C and 37 degrees C. 2. At all temperatures studied, the binding affinity (Kd or Ki) for 2-[125I]-iodomelatonin, melatonin (b...

journal_title：British journal of pharmacology

authors： Chong NW,Sugden D

更新日期：1994-01-01 00:00:00

abstract：:1. The inhibitory effect of caffeine on the calcium channel current was investigated in cultured myometrial cells isolated from pregnant rats. 2. Caffeine inhibited the calcium channel current elicited from a holding potential of -70 mV in a concentration-dependent manner. The IC50 was estimated to be 35 mM. 3. The ca...

journal_title：British journal of pharmacology

authors： Martin C,Dacquet C,Mironneau C,Mironneau J

更新日期：1989-10-01 00:00:00

abstract：:1. In rats, recovery of sensory-motor function following a crush lesion of the sciatic or tibial nerve was monitored by measuring foot reflex withdrawal from a local noxious stimulation of the foot sole. 2. Putative neurotrophic compounds were tested on this functional recovery model: melanocortins (peptides derived f...

journal_title：British journal of pharmacology

authors： Van der Zee CE,Brakkee JH,Gispen WH

更新日期：1991-05-01 00:00:00

abstract：:1 Urocortin is a vasodilator peptide related to corticotrophin-releasing factor, which may protect endothelial function during coronary ischemia-reperfusion (I-R). The aim of this study was to study the mechanisms of this protective effect. 2 Hearts from Sprague-Dawley rats were isolated and perfused at constant flow ...

journal_title：British journal of pharmacology

authors： García-Villalón AL,Amezquita YM,Monge L,Fernández N,Climent B,Sánchez A,Diéguez G

更新日期：2005-06-01 00:00:00