abstract：:We have studied the effects of the weak bases chloroquine, NH4Cl and amantadine on the handling of certain cardiac glycosides by HeLa cells. When these weak bases are applied acutely to HeLa cells they have only minor effects on the binding of cardiac glycosides to the sodium pumps and on the recovery of pump function...

journal_title：British journal of pharmacology

authors： Griffiths N,Lamb JF,Ogden P

更新日期：1983-08-01 00:00:00

abstract：:The hypothesis of negative feedback regulation of noradrenaline release was studied in guinea-pig left atrial halves mounted in vitro. Tissues were transmurally stimulated with 30, 100 or 300 pulses at 2 Hz with pulse durations ranging from 50 mus to 2,000 mus, and the efflux of 3H-transmitter determined. The efflux o...

journal_title：British journal of pharmacology

authors： Kalsner S

更新日期：1983-08-01 00:00:00

abstract：:In vitro preparations of rabbit heart were made from which measurements of effective refractory period (ERP), atrio-Hisian (A-H) and His-Purkinje (H-P) conduction times could be obtained, analogous to electrophysiological measurements customarily carried out in vivo. Intracellular potentials also were recorded from th...

journal_title：British journal of pharmacology

authors： Millar JS,Vaughan Williams EM

更新日期：1983-07-01 00:00:00

abstract：:Sodium transport has been measured in the isolated epithelium from colons of male Sprague-Dawley rats. Sodium transport in colons was induced by pretreating the animals with dexamethasone (6 mg kg-1) which caused the appearance of an amiloride-sensitive short circuit current within a few hours. Forskolin, a diterpene,...

journal_title：British journal of pharmacology

authors： Cuthbert AW,Spayne JA

更新日期：1983-07-01 00:00:00

abstract：:Fresh human erythrocytes were washed and incubated at 37 degrees C in physiological saline buffered with Tris, containing calcium and either neuraminidase or trypsin or both enzymes together. Each enzyme alone, as well as both together, released similar amounts of sialic acids without haemolysis, apparently therefore ...

journal_title：British journal of pharmacology

authors： Born GV,Housley GM

更新日期：1983-06-01 00:00:00

abstract：:The ability of chemically detoxified E. coli endotoxins and membrane-active agents to modify the toxicity of native E. coli endotoxin in vivo was examined. The time- and dose-dependent increase in plasma acid phosphatase activity following toxin administration to rats provided a convenient quantitative measure of in v...

journal_title：British journal of pharmacology

authors： Godin DV,Tuchek JM

更新日期：1983-06-01 00:00:00

abstract：:781094 (2-(2(1, 4-benzodioxanyl))-2-imidazoline hydrochloride) is a potent competitive inhibitor of the aggregatory responses of human platelets induced by adrenaline (pA2 = 7.3) and UK-14304. 781094 is a more potent inhibitor of the pro-aggregatory response to clonidine than of that to methoxamine. The alpha 2/alpha ...

journal_title：British journal of pharmacology

authors： Kerry R,Scrutton MC

更新日期：1983-06-01 00:00:00

abstract：:1 The effect of intrarenal histamine, dimaprit (H2-agonist) and 2-(2-pyridyl) ethylamine (H1-agonist) on renin release was examined in anaesthetized dogs. 2 In dogs with intact kidneys, histamine and dimaprit administration resulted in renal vasodilatation, a two fold increase in urinary sodium excretion, and no chang...

journal_title：British journal of pharmacology

authors： Gerber JG,Nies AS

更新日期：1983-05-01 00:00:00

abstract：:1 The metabolism of prostacyclin (PGI2) and 6-keto prostaglandin F1 alpha (6-keto PGF1 alpha) was studied in cell-free homogenates of rat, rabbit and guinea-pig kidney. 2 Rabbit kidney converted both PGI2 and 6-keto PGF1 alpha to a stable metabolite with chromatographic and biological activity identical to that of aut...

journal_title：British journal of pharmacology

authors： Griffiths RJ,Moore PK

更新日期：1983-05-01 00:00:00

abstract：:1 Palmitaldehyde, olealdehyde and linolealdehyde acetal phosphatidic acids induced rapid shape change and dose-dependent biphasic aggregation of human platelets in platelet-rich plasma; aggregation was reversible at low doses and irreversible at high doses of the acetal phosphatidic acids. The palmitaldehyde congener ...

journal_title：British journal of pharmacology

authors： Brammer JP,Maguire MH,Walaszek EJ,Wiley RA

更新日期：1983-05-01 00:00:00

abstract：:1 Morphine, Met-enkephalin, kyotorphin and D-phenylalanine have been applied by microiontophoresis to neurones in the globus pallidus and cerebral cortex of rats anaesthetized with urethane. 2 In the pallidum, most cells were inhibited by all the agonists, with a high correspondence between cells inhibited by Met-enke...

journal_title：British journal of pharmacology

authors： Stone TW

更新日期：1983-05-01 00:00:00

abstract：:1 The influence of dopamine receptor agonists on gastric acid secretion stimulated by thyrotropin-releasing hormone (TRH) was studied in the perfused stomach of anaesthetized rats. 2 Intraventricular TRH produced a dose-dependent stimulation of basal gastric acid secretion. 3 Pretreatment with apomorphine, bromocripti...

journal_title：British journal of pharmacology

authors： Maeda-Hagiwara M,Watanabe K

更新日期：1983-05-01 00:00:00

abstract：:1 Rat isolated perfused hearts with the right sympathetic nerves attached were loaded with [3H]-(-)-noradrenaline. The nerves were stimulated with up to 40 trains of 10 pulses every min at 1 Hz, and the evoked increases of [3H-]noradrenaline overflow into the perfusate, of right atrial tension development and ventricu...

journal_title：British journal of pharmacology

authors： Fuder H,Muscholl E,Spemann R

更新日期：1983-05-01 00:00:00

abstract：:1 The effects of gamma-aminobutyric acid (GABA) and related substances were examined in guinea-pig ileum longitudinal muscle.2 GABA at doses ranging from 10(-7) M to 3 x 10(-6) M elicited a relaxation while at higher doses (3 x 10(-6) M - 10(-4) M), as previously described, it caused a contraction followed by relaxati...

journal_title：British journal of pharmacology

authors： Giotti A,Luzzi S,Spagnesi S,Zilletti L

更新日期：1983-03-01 00:00:00

abstract：:1 The selectivity and specificity of RX 781094 [2-(2-(1,4 benzodioxanyl))2-imidazoline HCl] for alpha-adrenoceptors have been examined in peripheral tissues. 2 In isolated tissue experiments RX 781094 was a competitive antagonist at prejunctional alpha 2-adrenoceptors situated on the sympathetic nerve terminals of the...

journal_title：British journal of pharmacology

authors： Doxey JC,Roach AG,Smith CF

更新日期：1983-03-01 00:00:00

abstract：:1 In the guinea-pig vas deferens, grayanotoxin I (G-I), a diterpenic toxin isolated from certain ericaceous plants caused rhythmic contractions which were dose-dependent (5 x 10(-5) M - 10(-3) M); these followed an initial transient contraction.2 The G-I (3 x 10(-4) M)-induced contraction was markedly inhibited or abo...

journal_title：British journal of pharmacology

authors： Ohizumi Y

更新日期：1983-03-01 00:00:00

abstract：:1--Responses (relaxation) to the beta-adrenoceptor agonists, isoprenaline, fenoterol or noradrenaline, were obtained on cat tracheal preparations contracted with a submaximal concentration of carbachol (0.5 microM). 2--The relative potencies of isoprenaline: fenoterol: noradrenaline were 100:8.1:10.7. From this, it wa...

journal_title：British journal of pharmacology

authors： O'Donnell SR,Wanstall JC

更新日期：1983-02-01 00:00:00

abstract：:1 Twenty-two compounds classified as antidepressants, metabolites of antidepressants or putative antidepressants were assayed for their ability to antagonize the binding of (-)-[3H]-quinuclidinyl benzilate to muscarinic receptors in homogenates of human caudate nucleus. 2 Sixteen of these compounds were assayed for th...

journal_title：British journal of pharmacology

authors： El-Fakahany E,Richelson E

更新日期：1983-01-01 00:00:00

abstract：:1 The effect of 5-hydroxytryptamine (5-HT) on acid secretion by a rat isolated stomach preparation has been studied. 2 5-HT at 10(-5)M in the serosal bathing fluid produced significant inhibition of the acid secretory responses to histamine, pentagastrin and isoprenaline but was without effect on basal secretion or th...

journal_title：British journal of pharmacology

authors： Canfield SP,Spencer JE

更新日期：1983-01-01 00:00:00

abstract：:1 U46619, a prostaglandin H2 endoperoxide analogue and thromboxane A2 agonist, dose-dependently inhibited accumulation and metabolism of thromboxane B2 in the isolated perfused lung of the guinea-pig. At similar doses prostaglandins E1, E2, F1 alpha, F2 alpha, I2, 5, 6-trans-PGE2 and 8-iso-PGE1 were ineffective. 2 U46...

journal_title：British journal of pharmacology

authors： Hoult JR,Robinson C

更新日期：1983-01-01 00:00:00

abstract：:1 The effects of presynaptic alpha-adrenoceptor blockade on both the efflux of 3H-transmitter and on the magnitude of the effector response were measured simultaneously in a smooth muscle preparation which responds to field stimulation with noradrenergic beta-receptor-mediated relaxation. 2 In the presence of atropine...

journal_title：British journal of pharmacology

authors： Kalsner S

更新日期：1983-01-01 00:00:00

abstract：:1 The effects of pretreatment with aspirin, and of prostacyclin (PGI(2)) infusions, on responses to myocardial ischaemia and infarction produced by ligation of a coronary artery were investigated in conscious rats.2 Surgical preparation, under halothane anaesthesia, consisted of implanting exteriorized aortic and jugu...

journal_title：British journal of pharmacology

authors： Johnston KM,MacLeod BA,Walker MJ

更新日期：1983-01-01 00:00:00

abstract：:1 Release of [3H]-noradrenaline and 3H-purine by ouabain (10(-4)M) or high KCl (50 mM) was investigated in the superfused rabbit pulmonary arterial segment preincubated with [3H]-noradrenaline or [3H]-adenosine. 2 Ouabain elicited a delayed large contraction and a parallel [3H]-noradrenaline efflux. These were substan...

journal_title：British journal of pharmacology

authors： Katsuragi T,Su C

更新日期：1982-12-01 00:00:00

abstract：:1 A newly synthesized substance P (SP) analogue, (D-Pro2, D-Trp7,9)-SP, specifically antagonizes the contractile effects of SP on the guinea-pig isolated taenia coli. In addition, previous studies had indicated that the SP analogue per se is capable of contracting this preparation. The results of the present study on ...

journal_title：British journal of pharmacology

authors： Håkanson R,Hörig J,Leander S

更新日期：1982-12-01 00:00:00

abstract：:1 Contractile responses produced by the alpha 1-adrenoceptor selective agonist, phenylephrine, and the alpha 2-adrenoceptor selective agonists, oxymetazoline and clonidine, have been compared to those produced by noradrenaline (non selective) in the rat aorta. 2 The relative order of potency of the agonists was noradr...

journal_title：British journal of pharmacology

authors： Godfraind T,Miller RC,Lima JS

更新日期：1982-12-01 00:00:00

abstract：:Histamine-induced contractions of small airways from human lung were substantially augmented by the cyclo-oxygenase inhibitor, indomethacin, whereas the contraction of larger airways was not. Mixed cyclo-oxygenase/lipoxygenase inhibitors of arachidonic acid metabolism did not modify histamine-induced contractions of s...

journal_title：British journal of pharmacology

authors： Adcock JJ,Garland LG

更新日期：1982-12-01 00:00:00

abstract：:1 The concentrations of p- and m-tyramine, dopamine and homovanillic acid were measured in the mouse striatum following the subcutaneous administration of amfonelic acid, (+)-amphetamine or nomifensine.2 The administration of 2.5-25 mg/kg of amfonelic acid produced a reduction in p-tyramine that lasted at least 8 h. m...

journal_title：British journal of pharmacology

authors： Juorio AV

更新日期：1982-11-01 00:00:00

abstract：:1 The concept that presynaptic receptors regulate noradrenergic transmitter release via a system of inhibitory receptors mediating negative feedback relies on a supposed association between increases in stimulation-induced efflux of [3H]-noradrenaline by antagonists and blockade by them of the inhibitory effects of ex...

journal_title：British journal of pharmacology

authors： Kalsner S

更新日期：1982-10-01 00:00:00

abstract：:1 Synaptic potentials and the responses of frog spinal cord to various acidic amino acids were examined by means of the sucrose gap recording technique. 2 Divalent cations (50-250 microM) specifically antagonized responses evoked at N-methyl-D-aspartate (NMDA) receptors by N-methyl D,L aspartic acid (NMDLA). The rank ...

journal_title：British journal of pharmacology

authors： Smith PA

更新日期：1982-10-01 00:00:00

abstract：:1 Atrial pacing at progressively increasing frequencies was performed on unanaesthetized dogs through electrodes placed aseptically in the wall of the right atrium and exteriorized in the neck region. 2 Heart rate and two atrioventricular conduction (AVC) parameters, namely the Wenckebach Point (one or two systole blo...

journal_title：British journal of pharmacology

authors： Duchene-Marullaz P,Fabry-Delaigue R,Gueorguiev G,Kantelip JP

更新日期：1982-10-01 00:00:00

abstract：:1 The effects of the putative 5-hydroxytryptamine (5-HT) receptor antagonists, methysergide, mianserin and methergoline, the dopamine receptor antagonists, haloperidol, thioridazine and clozapine, and the noradrenaline (NA) receptor antagonists, phentolamine, phenoxybenzamine and propranolol on the behavioural respons...

journal_title：British journal of pharmacology

authors： Dourish CT

更新日期：1982-09-01 00:00:00

abstract：:1 Vasoactive intestinal polypeptide (VIP, 0.01- MicroM) produced dose-related relaxations of the mouse anococcygeus muscle. 2 Following incubation with indomethacin (2.8 microM 1 h) adenosine 5'-triphosphate (ATP, 0.5-10 mM) produced dose-related relaxations of the mouse anococcygeus. 3 Haemolysed blood reduced inhibi...

journal_title：British journal of pharmacology

authors： Gibson A,Tucker JF

更新日期：1982-09-01 00:00:00

abstract：:1. Arachidonic acid caused larger contractions to indomethacin-tested guinea-pig trachea than in control tracheae. 2. No change in contractions was obtained in tracheae treated with 5,8, 11, 14, eicosatetraynoic acid (ETYA 10 micro M). 3. ETYA (100 micro M) blocked the effect of indomethacin on arachidonic acid-induce...

journal_title：British journal of pharmacology

authors： Mitchell HW

更新日期：1982-08-01 00:00:00

abstract：:The effects of intravenous doses of Org 6001 and disopyramide (10 mg/kg) known to confer protection against early postligation-induced arrhythmias in the anaesthetized rat when given prophylactically, were assessed following postligation administration. When given 1 min after ligation both drugs greatly reduced the in...

journal_title：British journal of pharmacology

authors： Marshall RJ,Muir AW,Winslow E

更新日期：1982-08-01 00:00:00

abstract：:1 The actions of parathyroid hormone (PTH) are antagonized in vitro by the peptide [Nle-8, Nle-18, Tyr-34]-bPTH-(3-34)amide, an analogue of PTH. In this paper, the actions of the inhibitory peptide were investigated in vivo. 2 Native parathyroid hormone (bPTH-(1-84)), administered i.v. (0.17-1.51 nmol in volume of 0.3...

journal_title：British journal of pharmacology

authors： Gray DA,Parsons JA,Potts JT Jr,Rosenblatt M,Stevenson RW

更新日期：1982-06-01 00:00:00

abstract：:1 Both phasic and tonic responses to KCl 160 mM were reduced by Ca2+ deprivation. After 90 min, the phasic response was abolished but 13 +/- 1.5% of the tonic response remained. This resistant component was still present if the Ca2+-free solution contained EGTA 0.1 mM. The tonic response was more resistant to deprivat...

journal_title：British journal of pharmacology

authors： Hay DW,Wadsworth RM

更新日期：1982-05-01 00:00:00

abstract：:The diterpene, forskolin, is shown to produce a concentration-dependent, increase in short circuit current in two epithelial preparations, amphibian skin and rat colon. In the amphibian tissue the increase is sensitive to amiloride and due to an increase in electrogenic transepithelial sodium transport towards the ser...

journal_title：British journal of pharmacology

authors： Cuthbert AW,Spayne JA

更新日期：1982-05-01 00:00:00

abstract：:1 A rat isolated gastric mucosal preparation was used to monitor histamine output and acid secretion during stimulation by different secretagogues. 2 In non-stimulated preparations, spontaneous histamine output decreased over 450 min. 3 Stimulation of secretion with 4 (5)-methylhistamine or dibutyryl cyclic adenosine ...

journal_title：British journal of pharmacology

authors： Main IH,Pearce JB

更新日期：1982-05-01 00:00:00

abstract：:1 The presynaptic alpha-adrenoceptor blocking activity of the newly synthesized alpha-adrenoceptor blocking drug, benextramine, was evaluated in the isolated left atrium of the guinea-pig heart. 2 High-voltage stimulation increased the force of contraction of electrically driven atrial strips, presumably by releasing ...

journal_title：British journal of pharmacology

authors： Belleau B,Benfey BG,Melchiorre C

更新日期：1982-04-01 00:00:00

abstract：:1 Groups of mice were pretreated with the 5-hydroxytryptamine (5-HT) depletors, fenfluramine or p-chlorophenylalanine (PCPA), followed by pethidine or morphine. 2 Fenfluramine alone produced a short lasting analgesia but PCPA was without any effect. 3 Pethidine and morphine both increased hot plate reaction times meas...

journal_title：British journal of pharmacology

authors： Botting R,Morinan A

更新日期：1982-04-01 00:00:00