Abstract:
:The inhibition of hepatic microsomal aryl hydrocarbon hydroxylase (AHH) activity by SKF 525-A in vitro was studied in hepatic microsomes from rats of varying age, sex hormone status, and drug treatment. The concentration of SKF 525-A required to produce a 50% inhibition of AHH activity, the IC50, was determined for the various microsomal preparations. Microsomes from adult female and immature rats exhibited a similar sensitivity to SKF 525-A. However, microsomes from adult male rats were significantly more sensitive to the inhibitory effect of the drug. AHH activity from pseudohermaphroditic male rats was found to have the same sensitivity to SKF 525-A as in the female littermates. Microsomes obtained from adult rats that had been pretreated with various cytochrome P-450 inducing agents yielded significantly different IC50 values from untreated controls. These differences in IC50 values indicated that the predominant form(s) of cytochrome P-450 that hydroxylate benzo(a)pyrene varied with the age, hormonal, and induced status of the animal.
journal_name
Can J Physiol Pharmacoljournal_title
Canadian journal of physiology and pharmacologyauthors
Gontovnick LS,Bellward GDdoi
10.1139/y82-156subject
Has Abstractpub_date
1982-08-01 00:00:00pages
1083-8issue
8eissn
0008-4212issn
1205-7541journal_volume
60pub_type
杂志文章abstract::Lipopolysaccharide (LPS) is a key pathogenic factor in sepsis, and its recognition by toll-like receptor 4 (TLR4) can activate two district signaling pathways, leading to activation of transcription factors including NF-κB and interferon regulatory factor 3 (IRF3). Chloroquine (CQ) has been shown to affect LPS-TLR4 co...
journal_title:Canadian journal of physiology and pharmacology
pub_type: 杂志文章
doi:10.1139/cjpp-2016-0303
更新日期:2017-05-01 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
pub_type: 杂志文章
doi:10.1139/y76-014
更新日期:1976-04-01 00:00:00
abstract::The present study was designed to evaluate the role of endothelial NO in the hemodynamics and vascular changes that occur in heart failure following myocardial infarction in rats. Left ventricular systolic pressure (LVSP), mean blood pressure (MBP), aortic morphology (media thickness) and reactivity were evaluated in ...
journal_title:Canadian journal of physiology and pharmacology
pub_type: 杂志文章
doi:10.1139/y04-038
更新日期:2004-06-01 00:00:00
abstract::Noradrenaline spillover from skeletal muscle vascular areas increases during exercise but the underlying mechanisms are not well understood. Muscle contraction itself causes changes in many factors that could affect noradrenaline spillover. For instance, it has been reported that bradykinin is synthesized in skeletal ...
journal_title:Canadian journal of physiology and pharmacology
pub_type: 杂志文章
doi:
更新日期:2001-10-01 00:00:00
abstract::The vestibulo-ocular and vestibulo-collic reflexes are well-studied sensorimotor systems with dynamic properties that have been successfully modeled. Recently proposed matrix and tensorial models attempt to describe the spatial organization of these reflexes in three dimensions. Here we describe experiments that test ...
journal_title:Canadian journal of physiology and pharmacology
pub_type: 杂志文章
doi:10.1139/y88-083
更新日期:1988-04-01 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
pub_type: 杂志文章
doi:10.1139/y79-175
更新日期:1979-10-01 00:00:00
abstract::The leaves and bark of Cassia glauca Lam., a glabrous tree in the family Fabaceae, are used in folk medicine for the treatment of diabetes. The aim of this study was to investigate the antidiabetic activity of the aqueous extract of C. glauca bark. The various parameters that were studied in treated or untreated normo...
journal_title:Canadian journal of physiology and pharmacology
pub_type: 杂志文章
doi:10.1139/Y09-121
更新日期:2010-02-01 00:00:00
abstract::The effects of a vasopressin (AVP) pressor antagonist, d(CH2)5Tyr(Me)AVP, on mean arterial pressure (MAP), total peripheral resistance (TPR), cardiac output (CO), and the distribution of CO were investigated by the microsphere technique in three groups of pentobarbital anesthetized rats: intact (I), saralasin pretreat...
journal_title:Canadian journal of physiology and pharmacology
pub_type: 杂志文章
doi:10.1139/y86-194
更新日期:1986-08-01 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
pub_type: 杂志文章,评审
doi:10.1139/y92-246
更新日期:1992-01-01 00:00:00
abstract::Single-electrode voltage-clamp experiments were made on CA1 neurons in the presence of tetrodotoxin and K channel blockers. Applications of halothane (1-3% v/v) for 3-10 min caused a similar marked and reversible depression of slow inward currents (probably Ca currents) evoked by depolarizing pulses from a holding pot...
journal_title:Canadian journal of physiology and pharmacology
pub_type: 杂志文章
doi:10.1139/y88-257
更新日期:1988-12-01 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
pub_type: 杂志文章
doi:10.1139/y84-131
更新日期:1984-07-01 00:00:00
abstract::The ability of human skeletal muscle to provide anaerobically derived ATP during short-term, intense activity is examined. The paper emphasizes the information obtained from direct measurements of substrates, intermediates, and products of the pathways in muscle that provide anaerobically derived ATP. The capacity of ...
journal_title:Canadian journal of physiology and pharmacology
pub_type: 杂志文章,评审
doi:10.1139/y92-023
更新日期:1992-01-01 00:00:00
abstract::Acetylcholine (ACh) is an important regulator of intestinal epithelial ion transport via muscarinic or nicotinic ACh receptors. Previous studies emphasize the role of the M3 muscarinic receptor subtype in mediating the effects of cholinergic agonists on intestinal ion transport. With the prevalence of mouse models to ...
journal_title:Canadian journal of physiology and pharmacology
pub_type: 杂志文章
doi:10.1139/y06-068
更新日期:2006-11-01 00:00:00
abstract::Aspirin consumption has been reported to be able to reduce colorectal cancer risk in humans and in animal models of colon carcinogenesis. Although the mechanism involved in such an effect is not yet clear, both prostaglandin-dependent and -independent effects have been proposed. Using HT-29 Glc(-/+)cells, which origin...
journal_title:Canadian journal of physiology and pharmacology
pub_type: 杂志文章
doi:10.1139/y03-058
更新日期:2003-05-01 00:00:00
abstract::The connections of area postrema include a set of nuclei with a common topographical location immediately deep to the ependyma or pia mater. These nuclei are all within two principal synapses of the area postrema and can be reached by more than one route from it. There is direct evidence that, like the area postrema, ...
journal_title:Canadian journal of physiology and pharmacology
pub_type: 杂志文章,评审
doi:10.1139/y90-039
更新日期:1990-02-01 00:00:00
abstract::Autophagy regulates cellular homeostasis and integrates the cellular pro-survival machinery. We investigated the role of autophagy in the natural history of murine abdominal aortic aneurysms (AAA). ApoE(-/-) mice were implanted with saline- or angiotensin II (Ang-II)-filled miniosmotic pumps then treated with either t...
journal_title:Canadian journal of physiology and pharmacology
pub_type: 杂志文章
doi:10.1139/cjpp-2015-0068
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
pub_type: 杂志文章
doi:10.1139/y75-063
更新日期:1975-06-01 00:00:00
abstract::Several lines of evidence suggest that the responsiveness of the airways is heterogeneous, although the magnitude of this heterogeneity has not been quantified. We have developed a videomicroscopic method that allows the measurements of the responsiveness of individual explanted airways to contractile agonists such as...
journal_title:Canadian journal of physiology and pharmacology
pub_type: 杂志文章
doi:
更新日期:1997-07-01 00:00:00
abstract::Diabetes with vascular complication needs strict interventions to retard possible serious complications. This research estimated the possible interaction of rosiglitazone (RGN) with losartan (Los) in diabetic rats. Male Sprague-Dawley rats were randomly divided into nondiabetic rats, diabetic rats, and diabetic rats t...
journal_title:Canadian journal of physiology and pharmacology
pub_type: 杂志文章
doi:10.1139/cjpp-2017-0332
更新日期:2018-03-01 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
pub_type: 杂志文章
doi:10.1139/y08-064
更新日期:2008-09-01 00:00:00
abstract::Female rats subjected to 48 h of water deprivation drank more than similarly deprived males. There was no sexual difference in the dipsogenic responses to intracellular dehydration produced by intravenous hypertonic NaCl but females drank considerably more than males in response to the extracellular stimuli of hyperon...
journal_title:Canadian journal of physiology and pharmacology
pub_type: 杂志文章
doi:10.1139/y80-179
更新日期:1980-10-01 00:00:00
abstract::The issue of bimanual temporal coordination in human subjects is discussed for three selected movement paradigms: (i) simple, symmetric, bimanual finger movements, (ii) bimanual unloading, and (iii) a complex bimanual pull and grasp task. Temporal synchronization was found for all three experiments and was least varia...
journal_title:Canadian journal of physiology and pharmacology
pub_type: 杂志文章,评审
doi:10.1139/y94-084
更新日期:1994-05-01 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
pub_type: 杂志文章
doi:10.1139/y84-034
更新日期:1984-02-01 00:00:00
abstract::This study was designed to investigate whether and how triiodothyronine (T3) affects renal function in an experimental model of chronic kidney disease. Twenty-four female rats were divided into the following groups: sham-operated control group (n = 8), 5/6 nephrectomized group (Nx, n = 8), and 5/6 nephrectomized group...
journal_title:Canadian journal of physiology and pharmacology
pub_type: 杂志文章
doi:10.1139/cjpp-2017-0252
更新日期:2018-06-01 00:00:00
abstract::Using the glycogen depletion technique, we have examined utilization of specific fibre types during prolonged submaximal exercise to investigate the recruitment pattern employed by the central nervous system to sustain force generation in the face of a progressive glycogen depletion. Six male subjects (Vo2 max, 52.8 +...
journal_title:Canadian journal of physiology and pharmacology
pub_type: 杂志文章
doi:10.1139/y90-208
更新日期:1990-10-01 00:00:00
abstract::The objective of this study was to explore the action of angiotensin II (AII) on cardiac contractility and cyclic AMP (cAMP) generation by forskolin and isoproterenol in the hypertrophic myocardium of the salt-sensitive Dahl rat. Inbred Dahl S and Dahl R rats that had been on a diet supplemented with 6% NaCl were stud...
journal_title:Canadian journal of physiology and pharmacology
pub_type: 杂志文章
doi:10.1139/y94-086
更新日期:1994-06-01 00:00:00
abstract::Rats were fed on a diet containing 1% beta-guanidinopropionate (Gp) to deplete their muscles of creatine. The apparent energy reserves (creatine phosphate (CrP) + ATP) of rested state diaphragm muscle strips were found to be 79% depleted by this treatment. To determine if the effective energy reserves for contraction ...
journal_title:Canadian journal of physiology and pharmacology
pub_type: 杂志文章
doi:10.1139/y82-019
更新日期:1982-02-01 00:00:00
abstract::For 10 days, dogs were fed a normal salt diet containing 70 mequiv. Na+/day (NSD) followed by a high salt diet containing 170 mequiv. Na+/day (HSD) or 240 mequiv. Na+/day (VHSD), or the order was reversed. K+ in these diets was fixed at 40 mequiv./day. The different diets did not influence the basal level of serum cat...
journal_title:Canadian journal of physiology and pharmacology
pub_type: 杂志文章
doi:10.1139/y80-164
更新日期:1980-09-01 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
pub_type: 杂志文章
doi:10.1139/y2012-097
更新日期:2012-11-01 00:00:00
abstract::Cumulative data suggest the significant role of the renin-angiotensin system in the development of the pathological consequences of diabetes mellitus (DM). Newly synthesized AT2 receptor agonists gained importance as a target for creating new antihypertensives. The aim of the present work was to study the effects of p...
journal_title:Canadian journal of physiology and pharmacology
pub_type: 杂志文章
doi:10.1139/cjpp-2017-0428
更新日期:2018-05-01 00:00:00