Effect of calcium ionophore A23187 on pregnenolone metabolism to progesterone in rat granulosa cells.

abstract：:Isoprenaline and forskolin both inhibit contractions induced by antigen or by the calcium ionophore A23187 of guinea pig tracheal spirals and parenchymal strips. Antigen-induced airway contraction is considerably more sensitive to the inhibitory effects of isoprenaline than is A23187-induced contraction. In contrast, ...

journal_title：Canadian journal of physiology and pharmacology

authors： Burka JF

更新日期：1983-06-01 00:00:00

abstract：:Uroporphyrinogen decarboxylase (UROG-D) activity in the 10,000g supernatant of 17-day-old chick embryo liver homogenates was determined by measuring the conversion of pentacarboxylporphyrinogen I to coproporphyrinogen I. The optimum pH of the enzyme was found to be approximately 6.0 and enzyme activity was found to be...

journal_title：Canadian journal of physiology and pharmacology

authors： James CA,Marks GS

更新日期：1989-03-01 00:00:00

abstract：:Cardiac adenosine receptors are coupled to adenylate cyclase inhibition. In the guinea pig heart, the relative agonist potencies observed for adenylate cyclase inhibition were R-N6-phenylisopropyladenosine (R-PIA) = N6-cyclohexyladenosine greater than 5'-N-ethylcarboxamidoadenosine much greater than S-PIA. In both atr...

journal_title：Canadian journal of physiology and pharmacology

authors： Leung E,Woodcock EA

更新日期：1986-12-01 00:00:00

abstract：:The effects of iontophoretically applied Na+-, K+-dependent adenosinetriphosphatase (Na+,K+-ATPase) (EC 3.6.1.3) inhibitors (ouabain, digitoxin, digitoxigenin, strophanthin K, strophanthidin, thevetin A and B, ethacrynate, and harmaline) on the depression of rat cerebral cortical neurones by noradrenaline, 5-hydroxytr...

journal_title：Canadian journal of physiology and pharmacology

authors： Sastry BS,Phillis JW

更新日期：1977-04-01 00:00:00

abstract：:Sequestration of nitric oxide (NO) by subcellular fractions isolated from bovine pulmonary arterial medial layer (BPA) and rabbit platelets (RP) was studied utilizing a novel chemiluminescence--headspace gas technique. Sequestration in all fractions was similarly rapid (5 min) and remained constant for at least 30 min...

journal_title：Canadian journal of physiology and pharmacology

authors： Liu Z,Nakatsu K,Brien JF,Beaton ED,Marks GS,Maurice DH

更新日期：1993-12-01 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：:There is now evidence for the involvement of four beta-adrenoceptor populations in the regulation of cardiac function by catecholamines. Beta1- and beta2-adrenoceptor stimulation classically produces an increase in contractility. A fourth beta-adrenoceptor, as yet uncloned and designated provisionally as a beta4-adren...

journal_title：Canadian journal of physiology and pharmacology

authors： Gauthier C,Leblais V,Moniotte S,Langin D,Balligand JL

更新日期：2000-09-01 00:00:00

abstract：:Recent evidence suggests that some Ca2+ channels are regulated by a tyrosine kinase pathway. The possibility that Ca2+ entry is regulated by tyrosine kinase was investigated in canine vascular muscles. Functional studies were carried out in the dog mesenteric arteries and saphenous veins. Nicardipine-insensitive refil...

journal_title：Canadian journal of physiology and pharmacology

authors： Low AM

更新日期：1996-03-01 00:00:00

abstract：:Chrysin (CH) is a natural flavonoid with pharmacological influences. The purpose of the current study was the assessment of possible protective effects of CH against oxidative damage in the serum, liver, brain, and pancreas of streptozotocin (STZ)- induced diabetic rats. In the present study, the rats were divided int...

journal_title：Canadian journal of physiology and pharmacology

authors： Samarghandian S,Azimi-Nezhad M,Samini F,Farkhondeh T

更新日期：2016-04-01 00:00:00

abstract：:We previously reported that calpain, the Ca2+-sensitive cysteine protease, gets involved in atherogenesis. This study aimed to investigate the effects of calpain inhibitor I (CAI, 5 mg/kg per day) with or without NG-nitro-l-arginine-methyl ester (l-NAME) (100 mg/kg per day), the inhibitor of nitric oxide synthase (NOS...

journal_title：Canadian journal of physiology and pharmacology

authors： Yu L,Yin M,Yang X,Lu M,Tang F,Wang H

更新日期：2018-01-01 00:00:00

abstract：:Type 1 diabetes mellitus reduces lipoprotein lipase (LPL) activity in the heart. The diabetic phenotype of decreased LPL activity in freshly isolated cardiomyocytes persisted after overnight culture (16 h). Total cellular LPL activity was 311+/-56 nmol oleate released x h(-1) x mg(-1) cell protein in diabetic cultured...

journal_title：Canadian journal of physiology and pharmacology

authors： Ewart HS,Carroll R,Severson DL

更新日期：1999-08-01 00:00:00

abstract：:This study investigated the effects of prolonged exercise on muscle sarcoplasmic reticulum (SR) Ca2+ cycling properties and the metabolic responses with and without a session of exercise designed to reduce muscle glycogen reserves while on a normal carbohydrate (CHO) diet. Eight untrained males (VO(2peak) = 3.81 +/- 0...

journal_title：Canadian journal of physiology and pharmacology

authors： Duhamel TA,Green HJ,Perco JG,Ouyang J

更新日期：2005-07-01 00:00:00

abstract：:The major functional alpha1-adrenoceptor in the rat aorta is of the alpha1Dsubtype and that in the caudal artery is of the alpha1A subtype. In the present study, the participation of protein kinase C (PKC) and Rho kinase (RhoK) in contractile responses to stimulation of the alpha1-adrenoceptors in these two arteries w...

journal_title：Canadian journal of physiology and pharmacology

authors： Mueed I,Bains P,Zhang L,Macleod KM

更新日期：2004-10-01 00:00:00

abstract：:The active form of vitamin D3, 1α,25-dihydroxyvitamin D3 (1α,25(OH)2D3 or calcitriol), is known to inhibit the proliferation and invasiveness of many types of cancer cells, including breast, colon, pancreatic, prostate, and liver cancer cells. These findings support the use of 1α,25(OH)2D3 for the treatment of these t...

journal_title：Canadian journal of physiology and pharmacology

authors： Matsumoto Y,Kittaka A,Chen TC

更新日期：2015-05-01 00:00:00

abstract：:The level of circulating triacylglycerols is determined by the balance between their delivery into the plasma and their removal from it. Plasma triacylglycerols are derived either from dietary fat as chylomicrons or from endogenous hepatic synthesis as very low density lipoproteins. Their removal occurs through the ac...

journal_title：Canadian journal of physiology and pharmacology

authors： Herzberg GR

更新日期：1991-11-01 00:00:00

abstract：:Traumatic brain injury (TBI) is one of the main causes of intellectual and cognitive disabilities. In the clinic it is essential to limit the development of cognitive impairment after TBI. In this study, the effects of gallic acid (GA; 100 mg/kg, per oral, from 7 days before to 2 days after TBI induction) on neurologi...

journal_title：Canadian journal of physiology and pharmacology

authors： Sarkaki A,Farbood Y,Gharib-Naseri MK,Badavi M,Mansouri MT,Haghparast A,Mirshekar MA

更新日期：2015-08-01 00:00:00

abstract：:Experiments were done for indentification and localization of certain structural changes at different levels of jejunal villus of the hamster during positive and negative water transport across the intestine in vivo and in vitro. Positive transport occurred when the mucosal surface of the intestine was bathed (in vitr...

journal_title：Canadian journal of physiology and pharmacology

authors： Melligott TF,Beck IT,Dinda PK,Thompson S

更新日期：1975-06-01 00:00:00

abstract：:The role of sodium and calcium on strophanthidin inotropy was studied in canine cardiac Purkinje fibers perfused in vitro under conditions that vary cellular sodium and calcium. With high concentrations of strophanthidin (greater than or equal to 10(-7) M), force increases more in the presence of low [Ca]0 or high [Na...

journal_title：Canadian journal of physiology and pharmacology

authors： Li T,Bernabei R,Carbonin P,Vassalle M

更新日期：1986-11-01 00:00:00

abstract：:Disposition of the bis-pyridinium mono-oxime, HI-6, following intramuscular injection in rats (200 mg/kg bw), beagle dogs (10 and 50 mg/kg bw), and rhesus monkeys (50 mg/kg bw) revealed that the oxime was absorbed rapidly and completely from the site of injection, was distributed rapidly in the tissues, and that tissu...

journal_title：Canadian journal of physiology and pharmacology

authors： Ecobichon DJ,Comeau AM,O'Neil WM,Marshall WD

更新日期：1990-05-01 00:00:00

abstract：:This year, 2011, the Department of Pharmacology at the University of Alberta celebrated its 50th anniversary. This timeframe covers nearly the entire history of Cys-loop pentameric ligand-gated ion channel (pLGIC) research. In this review we consider how major technological advancements affected our current understand...

journal_title：Canadian journal of physiology and pharmacology

authors： Kozuska JL,Paulsen IM

更新日期：2012-06-01 00:00:00

abstract：:The aim of the present study was to investigate the protective effect of total flavones of rhododendra (TFR) pharmacological preconditioning against myocardial ischemia-reperfusion (I/R) injury and its probable mechanisms in rats. Rat myocardial I/R injury was induced by ligating and untying the left anterior descendi...

journal_title：Canadian journal of physiology and pharmacology

authors： Zhang JH,Chen ZW,Wu Z

更新日期：2008-03-01 00:00:00

abstract：:To evaluate the clinical efficacy of azithromycin, cefaclor, and amoxicillin in treatment of pediatric tonsillitis, a total of 256 children with Group A β-hemolytic streptococcus (GAS) tonsillitis were randomly divided into 3 groups. Only patients assessed with streptococcus-positive tonsillitis, considered to be comp...

journal_title：Canadian journal of physiology and pharmacology

authors： Li P,Jiang G,Shen X

更新日期：2019-10-01 00:00:00

abstract：:The influence of a program of high intensity training and of a combined program of high intensity training and prolonged submaximal training on adaptations to the vastus lateralis muscle was investigated in two groups of elite athletes. The high intensity training (H) consisted of ice hockey practices and games over a...

journal_title：Canadian journal of physiology and pharmacology

authors： Daub WD,Green HJ,Houston ME,Thomson JA,Fraser IG,Ranney DA

更新日期：1982-05-01 00:00:00

abstract：:The anticonvulsant activity of delta9-tetrahydrocannabinol (delta9-THC) has been determined against seizures induced in epileptic chickens by intermittent photic stimulation (IPS) and in epileptic and nonepileptic chickens by Metrazol. Intravenous administration of the drug reduced both the severity and incidence of s...

journal_title：Canadian journal of physiology and pharmacology

authors： Johnson DD,McNeill JR,Crawford RD,Wilcox WC

更新日期：1975-12-01 00:00:00

abstract：:Thermal resistance as determined by survival time was examined in different age groups of spontaneously hypertensive (SHR) rats during terminal heating. A comparison with age or weight matched controls indicated that the thermal resistance of SHR animals was markedly inferior to that of normotensive animals as evidenc...

journal_title：Canadian journal of physiology and pharmacology

authors： Wright G,Iams S,Knecht E

更新日期：1977-10-01 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：: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：:Hypothermia increases the sensitivity of isolated cardiac muscle to stimulation by beta-adrenoceptor agonists. The purpose of this study was to determine pharmacologically whether this supersensitivity is associated with a change in the affinity of agonists for the receptor. The positive inotropic and chronotropic res...

journal_title：Canadian journal of physiology and pharmacology

authors： Broadley KJ,McNeill JH

更新日期：1983-06-01 00:00:00

abstract：:Most physiological and pathophysiological responses to bradykinin are mediated by G-protein-coupled receptors designated B2 receptors. Discovery of antagonists for these receptors has brought about a revolution in research in the kinin field. The chemistry and development of antagonists for B2 kinin receptors are disc...

journal_title：Canadian journal of physiology and pharmacology

authors： Stewart JM

更新日期：1995-07-01 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