Abstract：
:Single-channel recordings from central neurons of the helix snail, Cepaea nemoralis, revealed two types of channels that could be activated by stretch (i.e., by the membrane deformation produced when suction is applied to the patch pipette). One, a K+ channel (58 pS in physiological solution), was evident in excised and cell-attached patches. Its conductance in symmetrical [K+] solutions indicated a channel of high K+ permeability (PK = 3.4 x 10(-13) cm/s). Though osmoregulation has been suggested as a function for such channels, comparisons among molluscs indicate osmotic milieu does not govern their expression; Cepaea is terrestrial, and stretch-activated K+ channels similar to those described here occur in aquatic and marine molluscs. The second type of channel, observed only in excised patches, was Cl- permeant; it had a large conductance (130 pS) and was inactive prior to patch excision. Membrane tension may not be the physiological activator of either the K+ or Cl- channel; the channels are designated as stretch-activated channels on the basis of their experimental behaviour during single-channel recording.
journal_name
Can J Physiol Pharmacoljournal_title
Canadian journal of physiology and pharmacologyauthors
Bédard E,Morris CEdoi
10.1139/y92-025subject
Has Abstractpub_date
1992-02-01 00:00:00pages
207-13issue
2eissn
0008-4212issn
1205-7541journal_volume
70pub_type
杂志文章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
pub_type： 杂志文章
doi：10.1139/y08-016
更新日期：2008-03-01 00:00:00
abstract：:Single ventricular cells have been isolated from adult guinea pig heart using a collagenase enzyme method. The procedure is straightforward, takes about 20 min, and yields 40-65% rod-shaped cells which are quiescent in millimolar Ca2+ solution. Electrophysiological studies involving external ion changes and ionic chan...
journal_title：Canadian journal of physiology and pharmacology
pub_type： 杂志文章
doi：10.1139/y81-139
更新日期：1981-08-01 00:00:00
abstract：:A single-compartment model used in this laboratory for continuously calculating ACTH secretion rates from measured plasma ACTH concentrations has been tested for its ability to follow changing rates of ACTH entry (rapid departure from steady state). ACTH was infused at known moderately high but physiological rates int...
journal_title：Canadian journal of physiology and pharmacology
pub_type： 杂志文章
doi：10.1139/y78-061
更新日期：1978-06-01 00:00:00
abstract：:The purpose of this article is to review the current state of knowledge of ethanol neurobehavioural teratogenesis and its postulated mechanisms. The review comprises an examination of ethanol teratogenesis in the human, including the fetal alcohol syndrome, and in experimental animals. Several current proposed mechani...
journal_title：Canadian journal of physiology and pharmacology
pub_type： 杂志文章,评审
doi：10.1139/y95-173
更新日期：1995-09-01 00:00:00
abstract：:The effects of haloperidol, an antipsychotic butyrophenone, on excitability and action potential production in frog's sartorius muscle fibers were studied. This drug produced a local-anestheticlike effect which developed slowly over 1 to 5 h with lower concentrations (2.7 to 5.3 X 10(-6 M) but was completely reversed ...
journal_title：Canadian journal of physiology and pharmacology
pub_type： 杂志文章
doi：10.1139/y77-066
更新日期：1977-06-01 00:00:00
abstract：:A variety of neural factors can influence reproductive hormone secretion by neuromodulatory actions within the hypothalamus or neuroendocrine actions within the anterior pituitary gland. Passive immunoneutralization and antagonist administration protocols have suggested physiological roles for a number of these factor...
journal_title：Canadian journal of physiology and pharmacology
pub_type： 杂志文章
doi：10.1139/y92-102
更新日期：1992-05-01 00:00:00
abstract：:The pHi regulation from intracellular acidosis in the central nervous system appears to be mediated by mechanisms driven by the large inwardly directed Na+ gradient. The involvement of these mechanisms in pHi regulation of neurones and glial cells has been investigated in the leech central nervous system using ion-sel...
journal_title：Canadian journal of physiology and pharmacology
pub_type： 杂志文章
doi：10.1139/y92-273
更新日期：1992-01-01 00:00:00
abstract：:This study investigated the potential of shikonin as an anticancer agent against liver cancer and an in vitro human hepatoma cancer model system. The HepG2 cell line was the hepatoma cancer model in the present study. The inhibitory effect of shikonin on the growth of HepG2 cells was measured by MTT assay. To explore ...
journal_title：Canadian journal of physiology and pharmacology
pub_type： 杂志文章
doi：10.1139/Y10-085
更新日期：2010-12-01 00:00:00
abstract：:The sodium-hydrogen exchanger (NHE) helps the cell to recover from intracellular acidosis. In this study, we have investigated the effect of HOE 642 (a specific NHE1 blocker) on papillary muscles from rats and guinea pigs during transient acidosis and PKC activation by recording developed force (DF), action potential ...
journal_title：Canadian journal of physiology and pharmacology
pub_type： 杂志文章
doi：10.1139/y03-091
更新日期：2003-10-01 00:00:00
abstract：:Garlic is a commonly used spice in folk medicine that can exert adverse health effects when given at a high dose. Grape seed and skin extract (GSSE) exhibits a variety of beneficial effects even at a high dose. In the present study we evaluated the toxicity of high-dose garlic treatment on liver and the protective eff...
journal_title：Canadian journal of physiology and pharmacology
pub_type： 杂志文章
doi：10.1139/y2012-025
更新日期：2012-05-01 00:00:00
abstract：:Heparin was introduced into the stomach or duodenum of mice separately in doses of ca. 250 mg/kg. A slight anticoagulant effect in the systemic circulation was detected in whole blood clotting times and factor X inhibition. In contrast to most drugs, more heparin was absorbed from the stomach than from the intestine. ...
journal_title：Canadian journal of physiology and pharmacology
pub_type： 杂志文章
doi：10.1139/y76-084
更新日期：1976-08-01 00:00:00
abstract：:Chronic caval dogs with ascites were identified as being natriuretic "responders" or "nonresponders" (delta UNaV less than 20 microequiv./min) following an infusion of atrial natriuretic peptide (ANP) (100 ng.kg-1.min-1). To learn more about the factors modulating tubular resistance to ANP, we attempted to convert res...
journal_title：Canadian journal of physiology and pharmacology
pub_type： 杂志文章
doi：10.1139/y92-120
更新日期：1992-06-01 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
pub_type： 杂志文章
doi：10.1139/y83-159
更新日期：1983-09-01 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
pub_type： 杂志文章,评审
doi：10.1139/y03-011
更新日期：2003-06-01 00:00:00
abstract：:The distribution of atrial natriuretic factor (ANF) binding sites in Wistar rat tissues, as well as tissues from other species was studied. Using autoradiography of slide mounted tissue sections incubated with 125I-labelled ANF, high densities of binding sites were found in the renal glomeruli and papilla, aortic smoo...
journal_title：Canadian journal of physiology and pharmacology
pub_type： 杂志文章
doi：10.1139/y85-226
更新日期：1985-11-01 00:00:00
abstract：:In sepsis, systemic inflammatory response syndrome (SIRS), and multiorgan dysfunction syndrome (MODS), a severe prognostically relevant cardiac autonomic dysfunction exists, as manifested by a strong attenuation of sympathetically and vagally mediated heart rate variability (HRV). The mechanisms underlying this attenu...
journal_title：Canadian journal of physiology and pharmacology
pub_type： 杂志文章,评审
doi：10.1139/Y09-012
更新日期：2009-04-01 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
pub_type： 杂志文章,评审
doi：10.1139/y85-046
更新日期：1985-03-01 00:00:00
abstract：:There are important differences in pain arising from deep tissues in comparison to cutaneous pain. These differences can be partially explained by the unique organization of nociceptive systems activated by stimulation of muscle, joint, or viscera. Recent evidence also indicates that stimulation of deep tissues can pr...
journal_title：Canadian journal of physiology and pharmacology
pub_type： 杂志文章,评审
doi：10.1139/y91-090
更新日期：1991-05-01 00:00:00
abstract：:Muramyl peptides derived from bacterial peptidoglycan are detected intracellularly by Nod1 and Nod2, 2 members of the newly characterized nod-like receptor (NLR) family of pattern recognition molecules. In the absence of bacterial invasion into the host cytosolic compartment, it remains unclear whether muramyl peptide...
journal_title：Canadian journal of physiology and pharmacology
pub_type： 杂志文章
doi：10.1139/y06-076
更新日期：2006-12-01 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
pub_type： 杂志文章
doi：10.1139/y84-180
更新日期：1984-09-01 00:00:00
abstract：:Using a time-lapse cinephotomicrographic technique, the locomotory paths taken by lymphocytes have been shown to satisfy the requirements for a continuous-time Markov chain analysis consisting of four directional states defined by the four quadrants of a Cartesian plane and state 0 in which the cells are stationary. T...
journal_title：Canadian journal of physiology and pharmacology
pub_type： 杂志文章
doi：10.1139/y79-016
更新日期：1979-01-01 00:00:00
abstract：:The responses of the circular muscle of canine colon to stimulation of intrinsic nerves and to the probable mediators of these nerves were studied in vivo. In vivo studies were carried out using close intra-arterial injections and local field stimulation of proximal, mid-, and distal colon while recording circumferent...
journal_title：Canadian journal of physiology and pharmacology
pub_type： 杂志文章
doi：10.1139/y88-060
更新日期：1988-04-01 00:00:00
abstract：:Eight pure triterpenoid saponin compounds isolated from the root of Polygala senega L., a plant indigenous to the Canadian prairies, were evaluated for their immunological activity in mouse models. The specific antibody responses of the IgG2a subclass increased significantly when isolated P. senega saponins were used ...
journal_title：Canadian journal of physiology and pharmacology
pub_type： 杂志文章
doi：10.1139/Y07-109
更新日期：2007-11-01 00:00:00
abstract：:The epicardial coronary venous pressure in 16 dogs was compared with coronary arterial pressure as well as aortic, intraventricular, and intramyocardial pressures. Partial aortic occlusion augmented intraventricular (IVP), intramyocardial (IMP), aortic (AP), and coronary arterial pressures. Peripheral coronary venous ...
journal_title：Canadian journal of physiology and pharmacology
pub_type： 杂志文章
doi：10.1139/y83-033
更新日期：1983-03-01 00:00:00
abstract：:Physical activity and training have some potential as tools for examining immune responses to inflammation and trauma. Contributors to the present symposium review various aspects of the inflammatory process, including issues of lymphocyte recirculation and endotoxemia. They examine also the extent and nature of the i...
journal_title：Canadian journal of physiology and pharmacology
pub_type： 杂志文章,评审
doi：10.1139/cjpp-76-5-469
更新日期：1998-05-01 00:00:00
abstract：:The first steps of leucine utilization are reversible deamination to α-ketoisocaproic acid (α-KIC) and irreversible oxidation. Recently, the regulatory role of leucine deamination over oxidation was underlined in rodents. Our aim was to measure leucine deamination and reamination in the whole body, in respect to previ...
journal_title：Canadian journal of physiology and pharmacology
pub_type： 杂志文章
doi：10.1139/cjpp-2017-0439
更新日期：2018-04-01 00:00:00
abstract：:In 2-kidney, 1-clip hypertensive rats, the time course of changes in blood pressure (BP), heart rate, activity of the sympathetic nervous system and the renin-angiotensin system, plasma and blood volumes, left ventricular (LV) and right ventricular (RV) weight, and LV dimensions were evaluated during treatment with hy...
journal_title：Canadian journal of physiology and pharmacology
pub_type： 杂志文章
doi：10.1139/y86-257
更新日期：1986-12-01 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
abstract：:The hypocalcaemic action of ethanol (3 g/kg body weight) was investigated in intact, thyroparathyroidectomized and antrectomized rats. It was found that ethanol administered either intraperitoneally or orally reduced plasma calcium concentrations within 30 min and that this response lasted for 8 h. Additional studies ...
journal_title：Canadian journal of physiology and pharmacology
pub_type： 杂志文章
doi：10.1139/y83-059
更新日期：1983-04-01 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
pub_type： 杂志文章
doi：
更新日期：2001-12-01 00:00:00
