L-641,953 (R-8-fluoro-dibenzo[b, f]thiepin-3-carboxylic acid-5-oxide): a novel thromboxane-prostaglandin endoperoxide antagonist.

abstract：:The effect of isoproterenol on mean right and left atrial pressures (RAP, LAP) and dimensions (RAD, LAD), and plasma immunoreactive atrial natriuretic factor (IR-ANF) was investigated in anesthetized rabbits. Infusion of isoproterenol (10 micrograms.kg-1.min-1 for 10 min) significantly increased plasma IR-ANF and hear...

journal_title：Canadian journal of physiology and pharmacology

authors： King KA,Wong A,Ledsome JR

更新日期：1991-04-01 00:00:00

abstract：:The isolated brachial spinal cord of the mudpuppy is useful for studies of neural networks underlying forelimb locomotion, but information about its anatomy is scarce. We addressed this issue by combining retrograde labeling with fluorescent tracers and confocal microscopy. Remarkably, the central region of gray matte...

journal_title：Canadian journal of physiology and pharmacology

authors： Jovanovic K,Burke RE

更新日期：2004-08-01 00:00:00

abstract：:Diabetes increases the risk and severity of cognitive impairment, especially after ischemic stroke. It is also known that the activation of the endothelin (ET) system is associated with cognitive impairment and microglia around the periinfarct area produce ET-1. However, little is known about the effect of ET-1 on mic...

journal_title：Canadian journal of physiology and pharmacology

authors： Abdul Y,Jamil S,He L,Li W,Ergul A

更新日期：2020-09-01 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：:In assessing the role that atrial natriuretic peptide (ANP) might have in the homeostasis of fluid volume and blood pressure, it is important to define the physiological and pathophysiological conditions that determine its release into the circulation. There is substantial evidence that ANP is released through atrial ...

journal_title：Canadian journal of physiology and pharmacology

authors： Rankin AJ

更新日期：1987-08-01 00:00:00

abstract：:A semisynthetic chemical compound, demethyldiisoeugenol, concentration dependently inhibited platelet aggregation and ATP release stimulated by thrombin (0.1 U/mL), platelet-activating factor (2 ng/mL), arachidonic acid (100 microM), collagen (10 micrograms/mL), and U46619 (1 microM) in rabbit washed platelets. The IC...

journal_title：Canadian journal of physiology and pharmacology

authors： Liao CH,Ko FN,Kuo YH,Teng CM

更新日期：1996-10-01 00:00:00

abstract：:Beat-to-beat variability of cardiac action potential duration (short-term variability, SV) is a common feature of various cardiac preparations, including the human heart. Although it is believed to be one of the best arrhythmia predictors, the underlying mechanisms are not fully understood at present. The magnitude of...

journal_title：Canadian journal of physiology and pharmacology

authors： Nánási PP,Magyar J,Varró A,Ördög B

更新日期：2017-10-01 00:00:00

abstract：:This study was designed to determine if tonic beta-adrenergic control of plasma renin activity (PRA) during dietary sodium restriction is due to stimulation of renal beta-adrenoceptors, extrarenal beta-adrenoceptors, or both. Experiments were performed in six conscious resting uninephrectomized dogs with chronically i...

journal_title：Canadian journal of physiology and pharmacology

authors： Blair ML,Gengo FM

更新日期：1995-08-01 00:00:00

abstract：:The effect of 6-hydroxydopamine (6-OH-dopamine) and of a cholesterol rich diet on the plasma and aortic cholesterol of female rats were studied. Both the diet and the 6-OH-dopamine produced an important increase in plasmatic and aortic cholesterol. A synergistic effect of these two treatments was observed on the plasm...

journal_title：Canadian journal of physiology and pharmacology

authors： Lelorier J,Tremblay M,de Champlain J,Gattereau A,Davingnon J

更新日期：1976-04-01 00:00:00

abstract：:The purpose of this study was to elucidate the mechanism whereby a potassium infusion led to an elevation in the urine minus blood (ohm-B) PCO2 difference in alkaline urine of the rabbit. Rabbits given 9alpha-fluorohydrocortisone 16 h prior to study had a significantly high olm-B PCO2 than control rabbits. However, th...

journal_title：Canadian journal of physiology and pharmacology

authors： Robson WL,Halperin ML,Stinebaugh BJ,Goldstein MB

更新日期：1981-03-01 00:00:00

abstract：:We have previously shown that A10 vascular smooth muscle cells (VSMC) exposed to angiotensin II (Ang II) exhibited overexpression of Giα proteins. In the present study, we examined the involvement of different signaling pathways in regulating Ang II induced enhanced expression of Giα proteins in VSMC by using pharmaco...

journal_title：Canadian journal of physiology and pharmacology

authors： Li Y,Anand-Srivastava MB

更新日期：2012-08-01 00:00:00

abstract：:A variety of porphyrinogenic xenobiotics cause mechanism-based inactivation of a number of rat hepatic cytochrome P450 isozymes. As a result, a mixture of four N-alkylprotoporphyin IX (N-alkylPP) regioisomers, with ferrochelatase-inhibitory properties, are formed. This study was designed to determine whether all four ...

journal_title：Canadian journal of physiology and pharmacology

authors： McNamee JP,Kobus SM,Marks GS

更新日期：1996-08-01 00:00:00

abstract：:The influence of variation in the extracellular concentrations of Na+, Mg2+, and Ca2+ in the depolarizing medium on isoproterenol-induced increases in cAMP levels and relaxation was studied in rat uterus. Isoproterenol (10(-8) M) failed to increase cAMP levels in the high-K+ medium containing no Na+. When 80 mM Na+ wa...

journal_title：Canadian journal of physiology and pharmacology

authors： Meisheri KD,McNeill JH

更新日期：1979-10-01 00:00:00

abstract：:In embryonic chick hearts during development, there are three inward current systems which are involved in the rising phases of the action potentials (APs): fast INa, slow ICa, and tetrodotoxin-insensitive slow INa. To assess reactivation processes for these three types of inward current channels (fast Na+, slow Ca2+,...

journal_title：Canadian journal of physiology and pharmacology

authors： Sada H,Sada S,Sperelakis N

更新日期：1986-02-01 00:00:00

abstract：:Calcium antagonists may reduce propensity to ventricular fibrillation, by altering the balance between coronary blood flow and metabolic demand, and thus may substantially prolong time to occurrence of fibrillations. This delay in the onset of fibrillation should be sufficient to prevent sudden death in the case of tr...

journal_title：Canadian journal of physiology and pharmacology

authors： Timour Q,Aupetit JF,Freysz M,Frassati D,Faucon G

更新日期：1996-12-01 00:00:00

abstract：:In experiments on isolated guinea pig papillary muscles the effects of verapamil (5 mg/L) and caffeine (1 g/L) on the two-component contraction were investigated. The muscles were continuously superfused with normal Tyrode's solution containing 2 mg of noradrenaline/L at 20--22 degrees C. The first derivative of contr...

journal_title：Canadian journal of physiology and pharmacology

authors： Bogdanov KY,Zakharov SI,Rosenshtraukh LV

更新日期：1979-08-01 00:00:00

abstract：:Although chronic cocaine use is cardiotoxic, its use remains problematic in athletics. Hence adaptive changes induced in the heart by superimposing chronic cocaine use on an exercise training are of interest but remain poorly understood. Therefore this study investigated the effects of cocaine treatment combined with ...

journal_title：Canadian journal of physiology and pharmacology

authors： Morris GS,Fiore PV,Hamlin RL,Sherman WM

更新日期：1994-01-01 00:00:00

abstract：:In recent experiments in conscious lambs, we showed that in addition to its well-known natriuretic and diuretic effects, i.v. injection of 2 mg/kg of furosemide resulted in a sustained increase in heart rate and an age-dependent increase in plasma renin activity. To determine whether these responses were dose dependen...

journal_title：Canadian journal of physiology and pharmacology

authors： Patel A,Smith FG

更新日期：1997-09-01 00:00:00

abstract：:The role of I(K) (delayed rectifier current) and I(f) (hyperpolarization-activated current) in dominant and subsidiary pacemaker ranges was studied in single myocytes isolated from the guinea pig sino-atrial node by means of a perforated patch-clamp technique. In the dominant pacemaker range (approx. -55 to -40 mV), I...

journal_title：Canadian journal of physiology and pharmacology

authors： Zhang H,Vassalle M

更新日期：2001-12-01 00:00:00

abstract：:Vascular smooth muscle tone is regulated primarily by the sarcoplasmic free Ca2+ concentration, which determines the level of myosin phosphorylation. Stimulation of the muscle results in an increase in free [Ca2+], whereupon Ca2+ binds to calmodulin, inducing a conformational change enabling calmodulin to interact wit...

journal_title：Canadian journal of physiology and pharmacology

authors： Walsh MP

更新日期：1994-08-01 00:00:00

abstract：:Continuous exposure to nitroglycerin (GTN) results in development of tolerance and is associated with increased free radical production and abnormal endothelial function. Elevated plasma biomarkers of inflammation have been shown to be associated with endothelial dysfunction in most cardiovascular conditions. It remai...

journal_title：Canadian journal of physiology and pharmacology

authors： Thomas GR,DiFabio JM,Gori T,Jenkins DJ,Parker JD

更新日期：2009-06-01 00:00:00

abstract：:Between 1 and 7 days of life, the newborn rabbit heart shifts from predominantly using carbohydrates to predominantly using fatty acids as an energy substrate. We therefore used isolated working hearts from 1- or 7-day-old rabbits to determine the effects of fatty acids on myocardial glucose use and the ability of hea...

journal_title：Canadian journal of physiology and pharmacology

authors： Lopaschuk GD,Spafford MA

更新日期：1992-10-01 00:00:00

abstract：:The synthesis, receptor binding, and agonist activity of a series of truncated atrial natriuretic analogs (ANF) are described. These analogs incorporate two portions of the native 28 amino peptide, the eight amino acids C-terminal to Cys7, and two amino acids from the C-terminus (phenylalanine and arginine), into disu...

journal_title：Canadian journal of physiology and pharmacology

authors： Holleman WH,Budzik GP,Devine EM,Pollock DM,Opgenorth TJ,Thomas AM,von Geldern TW,Rockway TW

更新日期：1991-10-01 00:00:00

abstract：:Immature female quails were treated for 6 days with estradiol benzoate at daily 0.01-, 0.02-, 0.01-, and 1-mg dosages. At the end of treatment, bile outflow, biliary cholesterol (CST), and bile acid (BA) secretory rates and liver, bile, and serum CST and BA levels were determined. Some quails were used to measure the ...

journal_title：Canadian journal of physiology and pharmacology

authors： Laugier C,Pageaux JF,Duperray B,Pacheco H,Brard E

更新日期：1979-04-01 00:00:00

abstract：:Altered cytochrome P450-catalyzed metabolism of 17beta-estradiol (E2) and estrone (E1) in the liver and (or) extrahepatic tissues may affect estrogen-sensitive tumorigenesis. We examined the effects of oral treatments of (i) indole-3-carbinol (13C) at 250 or 500 mg/kg or beta-naphthoflavone (beta-NF) at 40 mg/kg of bo...

journal_title：Canadian journal of physiology and pharmacology

authors： Ritter CL,Prigge WF,Reichert MA,Malejka-Giganti D

更新日期：2001-06-01 00:00:00

abstract：:Tension responses to ramp shortening of varying speed in whole muscle or single fibres from the plateau of an isometric tetanus, revealed at least two distinct phases. There was a fast initial drop in tension followed by a change of slope and a definite inflexion on the tension record. As the velocity of the imposed l...

journal_title：Canadian journal of physiology and pharmacology

authors： Bressler BH

更新日期：1985-12-01 00:00:00

abstract：:Plasma and serum of healthy subjects apparently contain a precursor form of renin, or 'prorenin,' which can be activated by the ice-cold temperature at which samples are customarily handled for prolonged periods in laboratories and blood banks. The effect of such prior cryoactivation for 9 days at 4 degrees C is to in...

journal_title：Canadian journal of physiology and pharmacology

authors： Osmond DH,Cooper RM

更新日期：1978-10-01 00:00:00

abstract：:In the rat, prolonged enteral or parenteral alimentation with a high-carbohydrate diet results in hyperinsulinemia, which is substantially greater with the parenteral route. Supplementing the parenteral infusate with porcine gastric inhibitory polypeptide (GIP) to approximate plasma immunoreactive GIP levels achieved ...

journal_title：Canadian journal of physiology and pharmacology

authors： Baer AR,Dupré J

更新日期：1989-09-01 00:00:00

abstract：:Despite major advances in conventional medical therapy, patients with heart failure continue to experience significant morbidity and mortality. Endothelin-1 (ET-1) is a potent vasocontrictor and mitogenic peptide that is activated in heart failure. There is increasing experimental and clinical evidence in support of a...

journal_title：Canadian journal of physiology and pharmacology

authors： Moe GW,Rouleau JL,Nguyen QT,Cernacek P,Stewart DJ

更新日期：2003-06-01 00:00:00

abstract：:Lectins, known to recognize endothelial cell adhesion molecules, have been shown to release endothelium-derived relaxing factor (EDRF) from blood vessels. We investigated the effects of different leukocyte-type cells to determine if these cells, by interacting with the endothelium, could release EDRF from the circumfl...

journal_title：Canadian journal of physiology and pharmacology

authors： Kleha JF,Devesly P,Johns A

更新日期：1995-03-01 00:00:00