Uncertainties in the risk assessment of three mycotoxins: aflatoxin, ochratoxin, and zearalenone.

abstract：:The world-wide increase in cancer incidence imposes a corresponding significant increase in the use of chemotherapeutic agents. Nephrotoxicity is a side effect frequently encountered with cyclophosphamide (CP), which is also well-known to cause acute and chronic lung toxicities. The current study focuses on the evalua...

journal_title：Canadian journal of physiology and pharmacology

authors： Said E,Elkashef WF,Abdelaziz RR

更新日期：2016-04-01 00:00:00

abstract：:We studied the effects of Zn2+ and Cd2+ on the behaviour of IK(f), a transient outward potassium current in acutely dissociated melanotrophs of the pars intermedia of the rat pituitary gland. Micromolar concentrations of external Cd2+ or Zn2+ caused parallel and nearly equal rightward shifts along the voltage axis of ...

journal_title：Canadian journal of physiology and pharmacology

authors： Davidson JL,Kehl SJ

更新日期：1995-01-01 00:00:00

abstract：:Our studies are guided by the novel hypothesis that protein tyrosine phosphorylation is an important mechanism for regulating contraction of smooth muscle. Several lines of evidence are reviewed which suggest that enhanced tyrosine phosphorylation participates in mechanisms that regulate cytosolic Ca2+ and Ca2+ sensit...

journal_title：Canadian journal of physiology and pharmacology

authors： Di Salvo J,Pfitzer G,Semenchuk LA

更新日期：1994-11-01 00:00:00

abstract：:Pertussis toxin (PTX) is a heterohexameric protein, which is divided into subunits A and B. The A-subunit (protomer) possesses adenine diphosphate (ADP) ribosyltransferase activity, and the B-oligomer confers cell surface binding specificity on the toxin. By virtue of the ADP-ribosylation activity in the A-subunit, PT...

journal_title：Canadian journal of physiology and pharmacology

authors： Wong WS,Rosoff PM

更新日期：1996-05-01 00:00:00

abstract：:Delta 9-Tetrahydrocannabinol (20 mg/kg i.p.) and propranolol (20 and 50 mg/kg i.p.) produced marked falls in the rectal temperatures of mice kept at an ambient temperature of 22 degrees C. Propranolol (50 mg/kg i.p.) also decreased the thermogenic activity of brown fat, as measured by a decrease in the level of [3H]GD...

journal_title：Canadian journal of physiology and pharmacology

authors： Pertwee RG,Nash K,Trayhurn P

更新日期：1991-06-01 00:00:00

abstract：:We have measured the responses to endurance exercise training on body composition and glucose regulation, as well as cardiovascular and liver structure and function in rats fed a high carbohydrate and high fat (HCHF) diet as a model of human metabolic syndrome. Male Wistar rats (9-10 weeks old) were randomly allocated...

journal_title：Canadian journal of physiology and pharmacology

authors： Cameron I,Alam MA,Wang J,Brown L

更新日期：2012-11-01 00:00:00

abstract：:Hereditary muscular hypertrophy is a character that has been selected in several animal species for industrial meat production. The selection of this character in cattle produces animals of exceptional commercial value but ones with a lower aerobic capacity than that of conventional cattle. The purpose of this work wa...

journal_title：Canadian journal of physiology and pharmacology

authors： Amory H,McEntee K,Linden AS,Desmecht DJ,Beduin JM,D'Orio V,Lekeux PM

更新日期：1993-12-01 00:00:00

abstract：:We examined the interaction of smooth muscle myosin with alpha-actin and beta-actin isoforms during the contraction of A7r5 smooth muscle cells and rat aortic smooth muscle. The techniques of confocal microscopy and fluorescence resonance energy transfer (FRET) analysis were utilized in examining A7r5 cells and rat ao...

journal_title：Canadian journal of physiology and pharmacology

authors： Black J,Dykes A,Thatcher S,Brown D,Bryda EC,Wright GL

更新日期：2009-05-01 00:00:00

abstract：:The cause of embryonic thyroidal enlargement in the progeny of chickens fed goitrogenic rapeseed meal (RSM) has been investigated. It has been found that eggs from birds fed RSM are low in iodine. The low concentration of iodine in the eggs of the goitrous birds is apparently due to diversion of a large proportion of ...

journal_title：Canadian journal of physiology and pharmacology

authors： March BE,Leung P

更新日期：1976-06-01 00:00:00

abstract：:In many species systemic toxicity of 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD) is manifested by a generalized wasting syndrome accompanied by a variety of specific organ changes including atrophy of the thymus and spleen. TCDD toxicity in most tissues is thought to be mediated by the Ah receptor. Although the spleen ...

journal_title：Canadian journal of physiology and pharmacology

authors： Roberts EA,Vella LM,Golas CL,Dafoe LA,Okey AB

更新日期：1989-06-01 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：:Previous studies have demonstrated that abdominal irradiation alters intestinal uptake of nutrients. The purpose of this study was to determine the effect of an orally administered synthetic prostaglandin E2, enprostil, given on three occasions shortly prior to a single exposure to 600 cGy external abdominal irradiati...

journal_title：Canadian journal of physiology and pharmacology

authors： Thomson AB,Keelan M,Clandinin MT,Tavernini M,Lam T,Walker K,Cheeseman CI

更新日期：1989-10-01 00:00:00

abstract：:The hemodynamic effects of the combination of clonidine and propranolol were studied in conscious rats with portal hypertension owing to secondary biliary cirrhosis. Pressure and blood flow measurements (radioactive microsphere method) were performed in three groups of eight rats before and after drug administration. ...

journal_title：Canadian journal of physiology and pharmacology

authors： Roulot D,Gaudin C,Braillon A,Sekiyama T,Bacq Y,Lebrec D

更新日期：1989-10-01 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：:To assess the physiological and clinical implications of the C-type natriuretic peptide (CNP)/guanylyl cyclase B (GC-B) system in the human vasculature, we have examined gene expressions of CNP and its receptor, GC-B, in human vascular endothelial cells (ECs) and smooth muscle cells (SMCs) and have also compared the e...

journal_title：Canadian journal of physiology and pharmacology

authors： Taura D,Nakao K,Nakagawa Y,Kinoshita H,Sone M,Nakao K

更新日期：2020-09-01 00:00:00

abstract：:This Symposium includes 15 presentations and an editorial review dealing with prorenin activation and function. It comes 20 years after prorenin was first reported in various contexts and attracted attention because of its connection with renin--angiotensin, its high concentration relative to renin in the blood, and i...

journal_title：Canadian journal of physiology and pharmacology

authors： Osmond DH,Sealey JE,McKenzie JK

更新日期：1991-09-01 00:00:00

abstract：:Ethanol was administered to rats by oral intubation 3 h after intraperitoneal administration of calcium carbimide. Increased blood acetaldehyde concentration and the presence of acetaldehyde in brain were found for the calcium carbimide--ethanol interaction. There was no detectable brain acetaldehyde for ethanol admin...

journal_title：Canadian journal of physiology and pharmacology

authors： Hoover DJ,Brien JF

更新日期：1981-01-01 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

abstract：:In male Sprague--Dawley rats, hypertensive development was diminished for 10 weeks when parathyroidectomy (PTX) was performed 1 week before deoxycorticosterone plus saline (DOCA + NaCl) treatment. In young spontaneously hypertensive male rats (SHR, Okamoto strain) parathyroidectomy performed after weaning lessened hyp...

journal_title：Canadian journal of physiology and pharmacology

authors： Gairard A,Berthelot A,Schleiffer R,Pernot F

更新日期：1982-02-01 00:00:00

abstract：:We investigated potential sex differences in bone resorption and the conservation of whole body bone mass in 24-week-old Sprague-Dawley rats maintained on a 1.0% calcium diet and then fed diets containing 0.02, 0.5, 1.0, or 1.75% calcium for 31 days. Lowering dietary calcium from 1.00% to 0.02% doubled whole skeleton ...

journal_title：Canadian journal of physiology and pharmacology

authors： Geng W,Wright GL

更新日期：2001-05-01 00:00:00

abstract：:The relationship between the postsynaptic alpha 1-adrenoceptor reserve and the sensitivity of vasoconstriction induced by alpha-adrenoceptor agonists to the dihydropyridine Ca2+ entry blocker nifedipine was investigated in isolated muscle strips of dog mesenteric artery (DMA) and saphenous vein (DSV). The amplitudes o...

journal_title：Canadian journal of physiology and pharmacology

authors： Guan YY,Kwan CY,Daniel EE

更新日期：1990-10-01 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：:We tested the effects of inhibiting the carbonic anhydrase activity of rat soleus and extensor digitorum longus muscles on the isometric contractile properties and the resistance to fatigue. SOL and EDL muscles from female rats were incubated in vitro in the presence of methazolamide, a specific inhibitor of carbonic ...

journal_title：Canadian journal of physiology and pharmacology

authors： Côté C,Tremblay D,Riverin H,Frémont P,Rogers PA

更新日期：1989-06-01 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

abstract：:Electrophysiological studies were performed on in vitro slice preparations of sympathetic ganglia excised from peripherally perfused, brain-dead human donors. The intracellular recordings in 16 neurons showed resting potentials and input resistances mostly in the ranges reported for sympathetic neurons in other mammal...

journal_title：Canadian journal of physiology and pharmacology

authors： Puil E,el-Beheiry H,Spigelman I

更新日期：1988-06-01 00:00:00

abstract：:High buffer cardioplegia may provide protection against ischemic damage by reducing the extent of intracellular acidosis. Secondary cardioplegia may improve postischemic recovery by restoration of high energy phosphates, ionic gradients, and intracellular pH. To test these hypotheses, pig hearts were arrested with hig...

journal_title：Canadian journal of physiology and pharmacology

authors： Tian GH,Mainwood GW,Biro GP,Smith KE,Butler KW,Lawrence D,Deslauriers R

更新日期：1991-11-01 00:00:00

abstract：:Gemcitabine, a nucleoside analogue for treating lung cancer, is clinically administered as an intravenous infusion. To achieve better patient compliance and more direct effect on the lung, we explored a new gemcitabine pulmonary delivery route and evaluated the pharmacokinetics and acute lung injury aspects in animals...

journal_title：Canadian journal of physiology and pharmacology

authors： Min R,Li T,Du J,Zhang Y,Guo J,Lu WL

更新日期：2008-05-01 00:00:00

abstract：:The calyx-type synapse of the embryonic chick ciliary ganglion is reviewed as a model of transmitter release from a vertebrate presynaptic nerve terminal. This nerve terminal is extensive in area, enabling the penetration with microelectrodes and the application of patch-clamp techniques. In other respects the calyx s...

journal_title：Canadian journal of physiology and pharmacology

authors： Stanley EF

更新日期：1992-01-01 00:00:00

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：:Heme plays a critical role in blood pressure regulation because it is required by a number of enzymes that synthesize vascular modulators, including nitric oxide (NO), carbon monoxide (CO), guanosine 3',5'-cyclic monophosphate (cGMP), endothelium-derived hyperpolarizing factor (EDHF), and prostacyclin. The goal of thi...

journal_title：Canadian journal of physiology and pharmacology

authors： Soong J,Adams MA,Nakatsu K

更新日期：2008-09-01 00:00:00