abstract：:1 The effects of diltiazem on smooth muscle cells of the canine basilar artery were investigated by means of microelectrode, double sucrose gap and isometric tension recording methods. 2 The mean membrane potential of the smooth muscle cells was -49.8 mV and they were electrically quiescent. Diltiazem (over 10(-5) M) ...

journal_title：British journal of pharmacology

authors： Fujiwara S,Ito Y,Itoh T,Kuriyama H,Suzuki H

更新日期：1982-03-01 00:00:00

abstract：:An approximate eight fold desensitization of the circular coat of the distal rabbit colon to adenosine 5'-triphosphate (ATP) and adenosine could be achieved by repeatedly exposing the organ to relatively low concentrations (10-100 microM) of these compounds. The desensitization was specific and reversible after prolon...

journal_title：British journal of pharmacology

authors： Crema A,D'Angelo L,Frigo GM,Lecchini S,Onori L,Tonini M

更新日期：1982-02-01 00:00:00

abstract：:delta 9-Tetrahydrocannabinol (delta 9-THC) was injected into the preoptic area of the anterior hypothalamus or into the third or fourth cerebral ventricle of the conscious mouse through a chronically implanted cannula and the effects on body temperature and oxygen consumption rate were measured. At an ambient temperat...

journal_title：British journal of pharmacology

authors： Fitton AG,Pertwee RG

更新日期：1982-02-01 00:00:00

abstract：:The relative potencies of a series of substance P analogues have been determined for spasmogenic activity in the guinea-pig ileum in vitro and for the release of 86Rb and alpha-amylase activity from rat parotid gland slices in vitro. Equipotent molar ratios (EMR), relative to substance P, were determined for all the c...

journal_title：British journal of pharmacology

authors： Gater PR,Jordan CC,Owen DG

更新日期：1982-02-01 00:00:00

abstract：:The administration of arachidonic acid (AA) to the isolated perfused heart of the rat usually produced biphasic coronary responses characterized by initial vasoconstriction followed by prolonged vasodilatation. However, some responses were predominantly vasoconstrictor or vasodilator. The non-steroidal anti-inflammato...

journal_title：British journal of pharmacology

authors： Belo SE,Talesnik J

更新日期：1982-02-01 00:00:00

abstract：:Adenosine 5'-diphosphate (ADP) induces human platelet aggregation and inhibits stimulated adenylate cyclase. Adenosine 5'-O-(1-thiodiphosphate) (ADP-alpha-S) and adenosine 5'-O-(2-thiodiphosphate) (ADP-beta-S) act at the ADP receptor and achieve the same maximal rate of human platelet aggregation as each other. Adenos...

journal_title：British journal of pharmacology

authors： Cusack NJ,Hourani SM

更新日期：1982-02-01 00:00:00

abstract：:[3H]-guanfacine (N-amidino-2-(2,6-dichloro 3[3H] phenyl) acetamide hydrochloride; 24.2 Ci/mmol) has been used as a radioligand in homogenates of rat cerebral cortex. Specific binding of [3H]-guanfacine was linear with respect to tissue concentration (2.5-15 mg/ml), saturable and not markedly affected in the pH range 6...

journal_title：British journal of pharmacology

authors： Jarrott B,Louis WJ,Summers RJ

更新日期：1982-02-01 00:00:00

abstract：:1 The synthesis of several butyrophenone analogues of haloperidol is described. 2 The effects of these compounds on alpha-adrenoceptors were evaluated by examining their ability to reduce alpha 1-stimulated K+ release from rat parotid slices and to displace [3H]-phentolamine from human platelet membrane alpha 2-adreno...

journal_title：British journal of pharmacology

authors： Atlas D,Friedman Z,Litvin Y,Steer ML

更新日期：1982-01-01 00:00:00

abstract：:1 The actions of prostaglandin F2 alpha (PGF2 alpha) and noradrenaline on contraction and 45Ca exchange have been studied in rat mesenteric arteries. 2 PGF2 alpha and noradrenaline contracted rat isolated mesenteric artery preparations to about the same extent. The PGF2 alpha-stimulated contractions, unlike those prod...

journal_title：British journal of pharmacology

authors： Godfraind T,Miller RC

更新日期：1982-01-01 00:00:00

abstract：:1 The effect of thiopentone, methohexitone, urethane and ketamine on the uptake and release of gamma-aminobutyric acid (GABA) and D-aspartate by rat thalamic slices has been investigated. 2 A high, supra-anaesthetic concentration of methohexitone increased the uptake of both D-aspartate and GABA. 3 None of the anaesth...

journal_title：British journal of pharmacology

authors： Kendall TJ,Minchin MC

更新日期：1982-01-01 00:00:00

abstract：:1 In the isolated basilar artery of the rabbit, gamma-aminobutyrate acid (GABA) (ED50 +/- s.e. mean, 2.4 +/- 1.1 x 10(-5) M) produced a relaxation, if the tone had been increased with 5-hydroxytryptamine (5-HT). 2 3-Aminoproprane sulphonic acid (3-APS) produced a similar, but smaller relaxation, while baclofen had no ...

journal_title：British journal of pharmacology

authors： Anwar N,Mason DF

更新日期：1982-01-01 00:00:00

abstract：:1 The actions of ethylenediamine (EDA) and structurally related compounds were investigated by microiontophoresis in Wistar rats. 2 EDA inhibited, via a bicuculline-sensitive mechanism, the spontaneous firing rate of all cortical and pallidal cells tested. 3 The results with the analogues suggest that two amine groups...

journal_title：British journal of pharmacology

authors： Perkins MN,Stone TW

更新日期：1982-01-01 00:00:00

abstract：:1 The rates at which tubocurarine associates with, and dissociates from, the nicotinic receptor, while exerting its classical competitive effect, are still in doubt. We have investigated this problem by observing the effect of low concentrations of tubocurarine on the re-equilibration rate, following a step change in ...

journal_title：British journal of pharmacology

authors： Colquhoun D,Sheridan RE

更新日期：1982-01-01 00:00:00

abstract：:1 Hypolipidaemic agents may increase biliary cholesterol in man, inducing a supersaturated bile. 2 To evaluate this possible side-effect, we have studied bile lipid secretion over a period of 8 h with intact enterohepatic circulation and 4 h with complete interruption in rats treated for two months with a salt of chol...

journal_title：British journal of pharmacology

authors： Aldini R,Barbara L,Benelli A,Borzatta V,Geminiani S,Mascellani G,Morselli A,Roda A,Roda E

更新日期：1981-11-01 00:00:00

abstract：:The chronic morphine-induced inhibition of rat liver tryptophan pyrrolase activity and the resultant increases in tryptophan availability to the brain and brain 5-hydroxytryptamine (5-HT) synthesis are reversed within 10 min after naloxone administration. The possible involvement of hepatic tryptophan metabolism in mo...

journal_title：British journal of pharmacology

authors： Badawy AA,Evans M

更新日期：1981-11-01 00:00:00

abstract：:1 The effect of clonidine on the 3H-purine release evoked by KCl or (-)-adrenaline was assessed in the superfused helical strip of the rabbit pulmonary artery pretreated with [3H]-adenosine. 2 Clonidine (3 x 10(-5) M to 10(-4) M) significantly enhanced the 3H-purine efflux evoked by 50 mM KCl but not by 3 x 10(-6) M) ...

journal_title：British journal of pharmacology

authors： Katsuragi T,Su C

更新日期：1981-11-01 00:00:00

abstract：:1 Embryonic sensory neurones of the chick grown in dissociated cell culture respond to application of low concentrations of gamma-aminobutyric acid (GABA) with a change in resting membrane resistance (R(in)) and/or a change in action potential duration (APD) (Dunlap & Fischbach, 1978; Choi & Fischbach, 1981). Intracel...

journal_title：British journal of pharmacology

authors： Dunlap K

更新日期：1981-11-01 00:00:00

abstract：:1 The influence of the external calcium concentration on the effect of harmine 2 x 10(-5) M upon the guinea-pig atrial muscle was analysed. Transmembrane potentials of contractile fibres were measured during exposure to the drug at 30 degrees C. 2 In preparations superfused with 1.35 mM Ca2+-Tyrode solution and driven...

journal_title：British journal of pharmacology

authors： Carpentier RG

更新日期：1981-10-01 00:00:00

abstract：:1 Anthopleurin-B (AP-B, greater than 3 x 10(-9) M), a newly isolated polypeptide from sea anemone (Anthopleura xanthogrammica), caused powerful rhythmic contractions in the guinea-pig isolated vas deferens. The other polypeptides anthopleurin-A from A. xanthogrammica and anthopleurin-C from A. elegantissima, elicited ...

journal_title：British journal of pharmacology

authors： Norton TR,Ohizumi Y,Shibata S

更新日期：1981-09-01 00:00:00

abstract：:1 Morphine-theophylline interactions were investigated in both acute and narcotic-dependent preparations, in vitro and in vivo, using four different experimental models: LD50 doses of morphine and naloxone in the mouse; naloxone-induced contractions in the electrically-stimulated and opiate-dependent isolated ileum of...

journal_title：British journal of pharmacology

authors： Brailowsky S,Guerrero-Muñoz F,Luján M,Shkurovich M

更新日期：1981-08-01 00:00:00

abstract：:1 The question whether constriction of local vessels is essential for the anti-inflammatory action of glucocorticoids in carrageenin-induced granulomatous inflammation was studied. 2 The vasodilator prostaglandin E1 injection into the granuloma pouch fluid increased the exudation of plasma protein into the granuloma t...

journal_title：British journal of pharmacology

authors： Sugio K,Tsurufuji S

更新日期：1981-07-01 00:00:00

abstract：:1 The effects of raising or lowering [Ca(2+)](o) or [Mg(2+)](o) on potential changes evoked by 5-hydroxytryptamine (5-HT) and by the nicotinic agonist, 1,1-dimethyl-4-phenyl piperazinium (DMPP) have been investigated.2 Changes in membrane potential were measured at the ganglion or in postganglionic axons by the sucros...

journal_title：British journal of pharmacology

authors： Nash HL,Wallis DI

更新日期：1981-07-01 00:00:00

abstract：:1 The appearance of pancreatic muscarinic receptors during development has been measured by use of the specific ligand [3H]-quinuclidinyl benzilate ([3H]-QNB). 2 QNB binding sites are present in foetal pancreas; their maximal concentration is attained at the age of 30 days and a significant decrease is observed in one...

journal_title：British journal of pharmacology

authors： Dumont Y,Larose L,Morisset J,Poirier GG

更新日期：1981-06-01 00:00:00

abstract：:1 Noradrenaline and 28 imidazolidine (clonidine-like) and imidazoline (oxymetazoline-like) compounds with various phenyl ring substituents have been examined for their ability to inhibit responses to transmural stimulation and exogenous acetylcholine in ileal preparations from reserpine-treated guinea-pigs.2 The bathi...

journal_title：British journal of pharmacology

authors： Malta E,Raper C,Tawa PE

更新日期：1981-06-01 00:00:00

abstract：:1 Nine antibiotic compounds in common use were studied to determine their ability to affect intestinal motility in vitro, in the guinea-pig ileum and rabbit colon. 2 Ampicillin, doxycycline, mecillinam and metronidazole were without effect over a concentration range which included typical serum levels found when these...

journal_title：British journal of pharmacology

authors： Lees GM,Percy WH

更新日期：1981-06-01 00:00:00

abstract：:In dog trachea in situ, perfused arterially with blood, isoprenaline, glyceryl trinitrate and N-nitroso-N-morpholinoamino-acetonitrile (SIN-1A) given intra-arterially, decreased tracheal tone which had been elevated by neostigmine and increased tracheal blood flow. Glyceryl trinitrate and SIN-1A were more effective on...

journal_title：British journal of pharmacology

authors： Maruyama M,Satoh K,Taira N

更新日期：1981-05-01 00:00:00

abstract：:1 The vasopressor response to prostaglandin F2 alpha (PGF2 alpha) and to ((15S)-hydroxy-11 alpha, 9 alpha-(epoxymethano)-prosta-5Z, 13E-dienoic acid) (U-46619) in the canine isolated lung lobe was significantly attenuated following the administration of verapamil. 2 The pressor response to arachidonic acid (AA) was no...

journal_title：British journal of pharmacology

authors： Angerio AD,Fitzpatrick TM,Kot PA,Ramwell PW,Rose JC

更新日期：1981-05-01 00:00:00

abstract：:1 Prostaglandin and thromboxane release from the term pregnant (Day 22) rat uterus in vitro has been measured by radioimmunoassay and gas chromatography combined with mass spectrometry. 2 Prostacyclin (prostaglandin I2, PGI2) and thromboxane A2 (TXA2) (measured as their metabolites, 6-oxo-PGF1 alpha and TXB2, respecti...

journal_title：British journal of pharmacology

authors： Phillips CA,Poyser NL

更新日期：1981-05-01 00:00:00

abstract：:1. The oral sedative potencies of cannabis herb, crude ethanolic and petroleum-ether fractions, were assayed against delta'-trans-tetrahydrocannabinol (THC) administered orally to mice, by measuring spontaneous motor activity over 30 min periods, at selected times, up to 6 h. 2. The THC contents of the extracts were d...

journal_title：British journal of pharmacology

authors： Pickens JT

更新日期：1981-04-01 00:00:00

abstract：:1. Endothelial cells from human umbilical veins were maintained in tissue culture. The fragility of lysosomal membranes were studied by microdensitometry. 2. Histamine (50 microM to 10 mM), 4-methylhistamine (100 nM to 10 mM) and dimaprit (100 nM to 10 mM) increased lysosomal fragility. 2-Thiazolylethylamine and 2-pyr...

journal_title：British journal of pharmacology

authors： Yoffe JR

更新日期：1981-04-01 00:00:00

abstract：:1. The effects of melanotrophin release inhibiting factor (MIF) and its cyclic analogue cyclo (Leu-Gly) on tolerance to the analgesic effect of morphine were studied in male Sprague-Dawley rats. 2. Tolerance to morphine was induced by implantation of four morphine pellets (each containing 75 mg of morphine free base) ...

journal_title：British journal of pharmacology

authors： Bhargava HN

更新日期：1981-04-01 00:00:00

abstract：:1. The effect of several clinically used dyes on prostaglandin E2 (PGE2) inactivation was studied in rat and human isolated lung. 2. All the dyes, given as infusions through the pulmonary circulation, inhibited the inactivation of PGE2 as measured by bioassay. The action of the dyes was readily reversible on stopping ...

journal_title：British journal of pharmacology

authors： Bakhle YS

更新日期：1981-04-01 00:00:00

abstract：:1. Column chromatography with Agarose A50m followed by Sephadex G100 was used to separate a fraction (extract II) in the molecular weight range 12,000 to 14,000 daltons from saline extracts of the sea anemone, Tealia felina. 2. Extract II inhibited histamine-induced contractions of the guinea-pig ileum and produced ha...

journal_title：British journal of pharmacology

authors： Aldeen SI,Elliott RC,Sheardown M

更新日期：1981-02-01 00:00:00

abstract：:1 Depolarizations were recorded intracellularly in smooth muscle from the taenia of the guinea-pig caecum in response to the iontophoretic application of acetylcholine, carbachol, oxotremorine-M, methylfurmethide, hexyl trimethylammonium and tetramethylammonium (TMA). 2 No differences between the iontophoretic respons...

journal_title：British journal of pharmacology

authors： Bolton TB,Clark JP

更新日期：1981-02-01 00:00:00

abstract：:1 Rats with unilateral electrolytic lesions involving both parts of the substantia nigra show dose-related, ipsilateral circling responses to apomorphine which are stable over time. 2 In non-tolerant rats, morphine (up to 10 mg/kg) does not elicit any circling behaviour but as tolerance develops to morphine, initially...

journal_title：British journal of pharmacology

authors： Halliwell JV,Kumar R

更新日期：1980-12-01 00:00:00

abstract：:1 alpha-Monofluoromethyldopa (MFMD, RMI 71963), a potent and selective enzyme-activated irreversible inhibitor of aromatic L-amino acid decarboxylase produces a substantial and long-lasting decrease in the catecholamine content of mouse brain, heart and kidney. 2 Single doses of MFMD reduce the 5-hydroxytryptamine con...

journal_title：British journal of pharmacology

authors： Bey P,Jung MJ,Koch-Weser J,Palfreyman MG,Sjoerdsma A,Wagner J,Zraïka M

更新日期：1980-12-01 00:00:00

abstract：:1 The N6-2-O-dibutyryl derivative of adenosine 3',5'-monophosphate (db cyclic AMP) has been micro-injected into the third cerebral ventricle of the unanaesthetized, restrained mouse and the effects on body temperature and thermoregulatory activities observed. 2 Db cyclic AMP (4, 16 and 32 micrograms) injected intracer...

journal_title：British journal of pharmacology

authors： Dascombe MJ,Milton AS,Nyemitei-Addo I,Pertwee RG

更新日期：1980-11-01 00:00:00

abstract：:1 Adenosine, adenosine monophosphate and adenosine triphosphate (ATP) depressed the firing rate of neurones in the rat cerebral cortex when applied by microinontophoresis. 2 4-Aminopyridine, also applied iontophoretically blocked the depressant effects of the purines, without affecting responses to gamma-aminobutyric ...

journal_title：British journal of pharmacology

authors： Perkins MN,Stone TW

更新日期：1980-11-01 00:00:00

abstract：:1 In cats anaesthetized with pentobarbitone, observations were made on respiration, spontaneous and evoked diaphragmatic electromyograms, blood pressure, heart rate, indirectly-induced contractions of the anterior tibialis muscle and nictitating membrane, and electrical excitability of the inspiratory centre in the me...

journal_title：British journal of pharmacology

authors： Borison HL,Ellis S,McCarthy LE

更新日期：1980-10-01 00:00:00

abstract：:1 Eleven analogues of sodium cromoglycate have been tested for their ability to suppress histamine release induced by anti-IgE from passively sensitized human lung fragments in vitro. 2 With the exception of WY 16922, which released histamine at high concentrations, all inhibited histamine release in a linear dose-rel...

journal_title：British journal of pharmacology

authors： Church MK,Gradidge CF

更新日期：1980-10-01 00:00:00