abstract：:Studies were conducted to determine whether Na-K ATPase or a second species of digitalis receptors in canine cardiac sarcolemma membrane preparations is associated with the positive inotropic action of nontoxic concentrations of ouabain. [3H]ouabain association and dissociation experiments using highly enriched sarcol...

journal_title：Canadian journal of physiology and pharmacology

authors： Kurobane I,Nandi DL,Okita GT

更新日期：1985-05-01 00:00:00

abstract：:The effect of diabetes (streptozotocin, 65 mg/kg ip), dietary protein intake (15-60%), and plasma amino acid concentrations on brain large neutral amino acid levels in rats was examined. After 20 days, the plasma concentrations of methionine and the branched chain amino acids (BCAA), valine, isoleucine, and leucine we...

journal_title：Canadian journal of physiology and pharmacology

authors： Glanville NT,Anderson GH

更新日期：1985-05-01 00:00:00

abstract：:Various researchers have hypothesized that the thickening of the vascular wall plays an important role in the maintenance of hypertension. Such an alteration can increase the vascular resistance by exerting two effects. A thickened vascular wall could occlude the lumen of the blood vessel and (or) cause the artery to ...

journal_title：Canadian journal of physiology and pharmacology

authors： Lee RM,Smeda JS

更新日期：1985-04-01 00:00:00

abstract：:In cultures of rat granulosa cells, luteinizing hormone-releasing hormone (LHRH) increases 32P incorporation into both phosphatidylinositol (PI) and phosphatidic acid (PA). After 20 min, the level of radioactivity was three- to four-fold (p less than 0.01) above control in the PI and PA fractions, respectively. The st...

journal_title：Canadian journal of physiology and pharmacology

authors： Minegishi T,Leung PC

更新日期：1985-04-01 00:00:00

abstract：:Both gonadotropin-releasing hormone (GnRH) and prostaglandin F2 alpha (PGF2 alpha) can inhibit cAMP and progesterone production in the corpus luteum; however, their mechanism of action is not known. GnRH or PGF2 alpha causes a rapid and marked increase of labelling of phosphatidylinositol (PI) and phosphatidic acid (P...

journal_title：Canadian journal of physiology and pharmacology

authors： Leung PC

更新日期：1985-03-01 00:00:00

abstract：:Vanadium (V) as sodium orthovanadate induces an increase in lipid peroxidation in the kidneys after a single subcutaneous or intraperitoneal injection to rats or mice. The rate of malondialdehyde (MDA) formation, an index of lipid peroxidation, by kidney homogenates increased by more than 100% 1 h after injection. Chr...

journal_title：Canadian journal of physiology and pharmacology

authors： Donaldson J,Hemming R,LaBella F

更新日期：1985-03-01 00:00:00

abstract：:Benzodiazepine binding to brain membrane preparations obtained from epileptic and nonepileptic carrier fowl was compared. [3H]Flunitrazepam binding to whole brain homogenates from 2-day-old chicks and [3H]diazepam binding to synaptosomal membranes and homogenates from adult chickens were determined. Scatchard analysis...

journal_title：Canadian journal of physiology and pharmacology

authors： Fisher TE,Davis LG,Tuchek JM,Johnson DD,Crawford RD

更新日期：1985-02-01 00:00:00

abstract：:Metaiodobenzylguanidine, which is used in the diagnosis and treatment of pheochromocytoma, produced 50% inhibition of monoamine oxidase at a concentration of 8 X 10(-6) M in vitro. These results suggest that a careful study of the structure of a new radiodiagnostic agent should be done to anticipate and prepare for po...

journal_title：Canadian journal of physiology and pharmacology

authors： Burba JV

更新日期：1985-02-01 00:00:00

abstract：:In using pharmacologic stimuli, force-velocity (FV) curves are usually obtained by the method of quick release (QR) and redevelopment of shortening at peak tetanic tension; the advantage of the method being that the active state is at maximum. However, the QR may itself reduce the intensity of the active state and res...

journal_title：Canadian journal of physiology and pharmacology

authors： Stephens NL

更新日期：1985-01-01 00:00:00

abstract：:The systemic and inotropic properties of prostaglandin E1 (PGE1) were investigated in 20 unanesthetized dogs. Pairs of ultrasonic dimension gauges and a micromanometer were implanted in the subendocardium and the apex of the left ventricle (LV), respectively. Seven to ten days later, increasing doses of PGE1 were infu...

journal_title：Canadian journal of physiology and pharmacology

authors： Roux S,Latour JG,Théroux P,Clozel JP,Bourassa MG

更新日期：1984-12-01 00:00:00

abstract：:To elucidate the mechanism of enhanced insulin sensitivity by muscle after exercise, we studied insulin binding, 2-deoxy-D-[1-14C]glucose (2-DOG) uptake and [5-3H]glucose utilization in glycolysis and glycogenesis in soleus and extensor digitorum longus (EDL) muscles of mice after 60 min of treadmill exercise. In the ...

journal_title：Canadian journal of physiology and pharmacology

authors： Bonen A,Tan MH,Watson-Wright WM

更新日期：1984-12-01 00:00:00

abstract：:The effect of hepoxilin A, a newly isolated hydroxyepoxide metabolite of arachidonic acid, on calcium transport across the visceral yolk sac membrane of the guinea pig was investigated in vitro in Ussing chambers. While 1-14C-labelled hepoxilin A itself was not transported across the membrane, it increased the rate of...

journal_title：Canadian journal of physiology and pharmacology

authors： Derewlany LO,Pace-Asciak CR,Radde IC

更新日期：1984-12-01 00:00:00

abstract：:A new antagonist of the vasoconstrictor eicosanoids, L-640,035, was studied in a standardized model of myocardial ischemia (MI) in anesthetized cats. This eicosanoid antagonist was not found to exert any overt hemodynamic action in cats subjected to a sham myocardial ischemia protocol. However, the antagonist markedly...

journal_title：Canadian journal of physiology and pharmacology

authors： Lefer AM,Burke SE,Lepran I

更新日期：1984-12-01 00:00:00

abstract：:Coronary flow was recorded from spontaneously beating isolated perfused hearts of rats and guinea pigs. Arachidonic acid (AA), in single bolus doses, produced a fast short lasting coronary constriction followed by a slow developing but persisting vasodilation. These reactions (biphasic type) were characteristic of the...

journal_title：Canadian journal of physiology and pharmacology

authors： Talesnik J,Tsoporis JN

更新日期：1984-10-01 00:00:00

abstract：:The effect of varying dietary levels of zinc was evaluated in mice fed T-2 toxin. A semipurified diet was used to produce a low zinc (less than 2 parts per million (ppm], a zinc replete (100 ppm), and a high zinc (2500 ppm) diet. T-2 toxin was added to the three zinc diets at a concentration of 10 ppm. The mice were f...

journal_title：Canadian journal of physiology and pharmacology

authors： Chanin BE,Hamilton DL,Hancock DS,Schiefer HB

更新日期：1984-10-01 00:00:00

abstract：:Ah receptor in hepatic cytosols from adult cynomolgus monkeys (Macaca fasicularis) was identified and quantitated by its binding of the highly toxic chemical 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD) and the carcinogens 3-methylcholanthrene, benzo[a]pyrene, and dibenz[a,h]anthracene. The concentration of Ah receptor ...

journal_title：Canadian journal of physiology and pharmacology

authors： Okey AB,Vella LM,Iverson F

更新日期：1984-10-01 00:00:00

abstract：:The effects of isoproterenol and forskolin on tension, cyclic AMP levels, and cyclic AMP dependent protein kinase activity were compared in helical strips of bovine coronary artery. Elevation of cyclic AMP and activation of the protein kinase appeared to be well correlated with relaxation of potassium-contracted arter...

journal_title：Canadian journal of physiology and pharmacology

authors： Vegesna RV,Diamond J

更新日期：1984-09-01 00:00:00

abstract：:In a Latin square design, nine New Zealand white male rabbits (2.8-4.8 kg) each received intravenous indocyanine green (ICG) in doses of 2.5, 12.5, and 25 mg/kg. A period of 4 weeks separated consecutive experiments. A specific high-pressure liquid chromatographic (HPLC) assay and the traditional spectrophotometric (S...

journal_title：Canadian journal of physiology and pharmacology

authors： Thiessen JJ,Rappaport PL,Eppel JG

更新日期：1984-09-01 00:00:00

abstract：:Extracellular spikes were recorded from cell bodies of sympathetic preganglionic neurones in spinal segments T1-T3 of the cat. Each neurone was identified by its antidromic response to electrical stimulation of the sympathetic chain and was found in histological sections to lie within the intermediolateral nucleus. Ph...

journal_title：Canadian journal of physiology and pharmacology

authors： Backman SB,Henry JL

更新日期：1984-09-01 00:00:00

abstract：:Dissociated neuronal cultures have become a popular tool to address a number of questions in neurobiology. These culture systems may provide useful paradigms to approach problems related to in vivo neurotoxicity of xenobiotics. The clinical spectra of vinca neurotoxicity and alcohol teratogenesis is reviewed, and some...

journal_title：Canadian journal of physiology and pharmacology

authors： Riopelle RJ,Dow KE,Eisenhauer E

更新日期：1984-08-01 00:00:00

abstract：:The historical perspective as well as the nature and causes of acid precipitation are presented. The toxicological effects of acid precipitation on lakes, other water bodies, fish, and invertebrate fauna are reviewed. In addition, the effects of this phenomenon on soil productivity and forest growth are examined. It a...

journal_title：Canadian journal of physiology and pharmacology

authors： Rutherford GK

更新日期：1984-08-01 00:00:00

abstract：:Androgens have been reported to stimulate progesterone production by granulosa cells of several species, and to act synergistically with FSH in stimulation of progesterone accumulation by rat granulosa cells. Studies were undertaken to examine the effect of androgens on FSH-stimulated progesterone production in cultur...

journal_title：Canadian journal of physiology and pharmacology

authors： Evans G,Lischinsky A,Daniel SA,Armstrong DT

更新日期：1984-07-01 00:00:00

abstract：:The blood volume of anesthetized rats was expanded acutely by 33% with donor blood while a caval snare was gradually tightened so that right atrial pressure (RAP) was prevented from rising (n = 6). In control experiments (n = 5) an aortic snare was used to hold mean arterial blood pressure near the values found in the...

journal_title：Canadian journal of physiology and pharmacology

authors： Ackermann U,Rudolph JR

更新日期：1984-07-01 00:00:00

abstract：:The rat atrium contains a potent natriuretic factor which appears to inhibit the sodium reabsorption in the collecting tubules of the kidneys. We examined the effects of the injection of partially purified atrial natriuretic factor (ANF) and synthetic ANF (8-33) into rats with simultaneous infusions of dextrose or apr...

journal_title：Canadian journal of physiology and pharmacology

authors： Thibault G,Garcia R,Cantin M,Genest J

更新日期：1984-06-01 00:00:00

abstract：:In cats anesthetized with pentobarbital, isoproterenol infused into a peripheral vein causes a reduction in hepatic blood volume measured by plethysmography. As this response is accompanied by increases in portal and hepatic lobar venous pressures, the decrease in hepatic volume cannot be a passive emptying secondary ...

journal_title：Canadian journal of physiology and pharmacology

authors： Seaman KL,Greenway CV

更新日期：1984-06-01 00:00:00

abstract：:Ethanol (0.3 g/kg) was administered intravenously to adult, male rats at 3 h or at 1 and 3 h after gastric intubation of 7 mg/kg calcium carbimide (CC). For animals administered CC and two ethanol doses, blood ethanol concentration was similar for the two doses; however, blood acetaldehyde concentration was significan...

journal_title：Canadian journal of physiology and pharmacology

authors： Loomis CW,Brien JF

更新日期：1984-05-01 00:00:00

abstract：:Radiolabelled acetylsalicylic acid (ASA) and salicylic acid (SA) were given intravenously to four near-term ewes and their occurrence in both maternal and fetal plasma was ascertained using a specific thin-layer chromatographic analysis procedure. Findings proved that ASA and SA cross the placental barrier and reach d...

journal_title：Canadian journal of physiology and pharmacology

authors： Thiessen JJ,Salama RB,Coceani F,Olley PM

更新日期：1984-04-01 00:00:00

abstract：:Cetamolol, a new beta-adrenoceptor blocker with partial agonist activity and cardioselectivity, was studied in vivo to determine its membrane-stabilizing effects. Comparisons were carried out with atenolol, pindolol, practolol, propranolol, timolol, dexpropranolol, lidocaine, and procaine. The following results indica...

journal_title：Canadian journal of physiology and pharmacology

authors： Beaulieu G,Jaramillo J,Cummings JR

更新日期：1984-03-01 00:00:00

abstract：:A hydroperoxide compound structurally related to acetylsalicylic acid, 3-hydroperoxy-3-methylphthalide, inhibits both the first and second phases of adenosine diphosphate induced, biphasic, human platelet aggregation. This occurs over the same concentration range (0.05-0.5 mM) that acetylsalicylic acid inhibits second...

journal_title：Canadian journal of physiology and pharmacology

authors： Killackey JJ,Killackey BA,Cerskus I,Philp RB

更新日期：1984-03-01 00:00:00

abstract：:The kinetics of sodium gradient dependent phosphate uptake by the renal brush border membrane vesicles of the rat have ben studied under various conditions of temperature and pH. From 7 to 30 degrees C the Lineweaver-Burk plots are linear, and the apparent Km progressively increases from 54 to 91 microM. Above 30 degr...

journal_title：Canadian journal of physiology and pharmacology

authors： Brunette MG,Beliveau R,Chan M

更新日期：1984-02-01 00:00:00

abstract：:Using radioligand binding techniques, the effect of reserpine pretreatment on ventricular adrenergic receptors from guinea pig was studied. [3H]Prazosin and [3H]dihydroalprenolol were used to label alpha 1- and beta-adrenergic receptors, respectively. Administration of 2.5 mg/kg reserpine for 2 days caused a significa...

journal_title：Canadian journal of physiology and pharmacology

authors： Latifpour J,McNeill JH

更新日期：1984-01-01 00:00:00

abstract：:Amiodarone is a new antiarrhythmic drug, commonly coadministered with digoxin in various cardiac disorders. Amiodarone caused a 10-fold increase of serum digoxin in rats, when the two drugs were simultaneously administered. Amiodarone significantly reduced digoxin uptake by renal cortical slices in the rat, and failed...

journal_title：Canadian journal of physiology and pharmacology

authors： Koren G,Soldin S,Macleod SM

更新日期：1983-12-01 00:00:00

abstract：:Chronic potassium deficiency in one-kidney one-clip hypertensive dogs significantly reduces blood pressure and plasma potassium, with a simultaneous increase in plasma renin activity. Tissue potassium concentration was decreased and tissue sodium concentration was increased in striated muscle and adrenal glands, which...

journal_title：Canadian journal of physiology and pharmacology

authors： Garcia R,Constantopoulos G,Gutkowska J,Genest J

更新日期：1983-12-01 00:00:00

abstract：:Hearts from rats pretreated either with L-triiodothyronine (T3) or with L-thyroxine (T4) exhibited changed function curve characteristics on the working heart apparatus compared with hearts from vehicle-treated rats. There was no supersensitivity of the hyperthyroid myocardium to the inotropic effect of isoproterenol ...

journal_title：Canadian journal of physiology and pharmacology

authors： Marriott ML,McNeill JH

更新日期：1983-11-01 00:00:00

abstract：:The effects of modulators of Ca-ATPase and alkaline phosphatase (AP) activity on placental calcium and phosphorus transfer were studied using the in situ perfused guinea pig placenta. The diuretics ethacrynic acid and furosemide had no significant effect on placental calcium and phosphorus transfer when injected into ...

journal_title：Canadian journal of physiology and pharmacology

authors： McKercher HG,Derewlany LO,Radde IC

更新日期：1983-11-01 00:00:00

abstract：:The freezing point and the melting point of myoplasm were measured with two experimental models. In all samples, a supercooled stage was reached by lowering the temperature of the sample to approximately - 7 degrees C, and the freezing of the sample was mechanically induced. The freezing process was associated with a ...

journal_title：Canadian journal of physiology and pharmacology

authors： Caillé JP

更新日期：1983-10-01 00:00:00

abstract：:The effect of a novel antianginal agent, molsidomine (N-ethoxycarbonyl-3-morpholinosydnonimine) (SIN-10) and its metabolites, 3-morpholinosydnonimine (SIN-1) and N-nitroso-N-morpholinoaminoacetonitrile (SIN-1A) on isolated dog blood vessels were investigated. SIN-1 and SIN-1A elicited a concentration-dependent relaxat...

journal_title：Canadian journal of physiology and pharmacology

authors： Muramatsu I,Fujii K,Sakakibara Y,Fujiwara M

更新日期：1983-09-01 00:00:00

abstract：:Tolerance to ethanol was induced in male Sprague-Dawley rats (225-250 g) by chronic feeding with a liquid diet containing 6.5% ethanol (v/v). Control rats were pair-fed with a liquid diet in which the ethanol was replaced by an equicaloric concentration of sucrose. Immediately following sacrifice of the animals the ne...

journal_title：Canadian journal of physiology and pharmacology

authors： Gianoulakis C,Chan JS,Kalant H,Chrétien M

更新日期：1983-09-01 00:00:00

abstract：:The threshold for electrically induced ventricular fibrillation was determined in anesthetized open-chest dogs, before and after blockade of atrioventricular (A-V) conduction. Without exception, the threshold was significantly elevated after creation of the block. The precise mechanism of this effect is not known at t...

journal_title：Canadian journal of physiology and pharmacology

authors： Reynolds AK,Dresel PE

更新日期：1983-09-01 00:00:00

abstract：:The effects of localized distension of the pulmonary vein - left atrial junctions on plasma arginine vasopressin (AVP) have been examined in chloralose anaesthetized dogs. Pulmonary vein distension caused an increase in heart rate and a decrease in plasma AVP concentration. Cooling the vagosympathetic nerves to 10 deg...

journal_title：Canadian journal of physiology and pharmacology

authors： Wilson N,Ledsome JR

更新日期：1983-08-01 00:00:00