Abstract：
:The effect of Ca2+ on the oxytocin-induced, sustained contraction of rat uterine muscle in Ca-free medium after prolonged incubation with 3 mM EGTA (Ca-free contraction) was investigated. A micromolar concentration of Ca2+ caused phasic contraction followed by relaxation while a submicromolar concentration caused relaxation only. Cumulative addition of Ca2+ (10(-8)-3 X 10(-6) M) caused dose-dependent relaxation (Ca reversal). This relaxation was inhibited by nicardipine and enhanced by Bay k 8644, and the effects of these two drugs were potentiated in 45.6 mM K+ medium. It is concluded that the inhibitory effect of Ca2+ on Ca-free contraction is caused by the influx of a minute amount of Ca2+. Thus, Ca2+ has dual actions in the cell: activation at concentrations higher than 10(-6) M, and inhibition alone at concentrations lower than 10(-7) M.
journal_name
Eur J Pharmacoljournal_title
European journal of pharmacologyauthors
Matsuo K,Uchida MKdoi
10.1016/0014-2999(87)90286-xsubject
Has Abstractpub_date
1987-08-21 00:00:00pages
295-301issue
3eissn
0014-2999issn
1879-0712pii
0014-2999(87)90286-Xjournal_volume
140pub_type
杂志文章abstract：:N-Phthaloyl gamma-aminobutyric acid, a new gamma-aminobutyric acid derivative synthesized in this laboratory, has been found to possess anticonvulsant, antinociceptive and antistress activities. Effects of this derivative on gastric lesions induced by aspirin and ethanol were studied in rats. N-Phthaloyl gamma-aminobu...
journal_title：European journal of pharmacology
pub_type： 杂志文章
doi：10.1016/0014-2999(92)90298-i
更新日期：1992-08-25 00:00:00
abstract：:Increasing evidence demonstrates that oxidative stress plays an important role in brain injury in experimental models of brain ischemia. Thymoquinone, the main constituents of the volatile oil from Negella sativa seeds, is reported to possess strong antioxidant properties. Hence, the present study was undertaken to ev...
journal_title：European journal of pharmacology
pub_type： 杂志文章
doi：10.1016/j.ejphar.2006.05.046
更新日期：2006-08-14 00:00:00
abstract：:Recent reports have provided evidence for a new concept that in small resistance arteries α1D-adrenoceptor-mediated contraction is intimately linked to pannexin-1 (Px1) hemichannels that open to allow the release of ATP, from the smooth muscle effector cell, that acts back on P2Y purinoceptors to cause contraction. Th...
journal_title：European journal of pharmacology
pub_type： 杂志文章
doi：10.1016/j.ejphar.2015.01.024
更新日期：2015-03-05 00:00:00
abstract：:Characteristics of muscarinic receptors were investigated in circular muscle from normal human colon. In saturation studies (n=18), binding of [3H]quinuclidinyl benzylate (QNB) was of high affinity (K(d) 87.3 pM) and capacity (B(max) 362+/-27 fmol/mg protein), with no differences between ascending and sigmoid colon. K...
journal_title：European journal of pharmacology
pub_type： 杂志文章
doi：10.1016/j.ejphar.2003.10.008
更新日期：2003-12-15 00:00:00
abstract：:Cocaine is eliminated and detoxified principally through the metabolism of nonspecific plasma and tissue esterases. Microsomal oxidative metabolism is of importance in cocaine N-demethylation, this being a principal pathway of cocaine bioactivation and hepatotoxicity. The contribution of different cytochrome P450 (CYP...
journal_title：European journal of pharmacology
pub_type： 杂志文章
doi：10.1016/0926-6917(94)90078-7
更新日期：1994-01-03 00:00:00
abstract：:We tested the hypothesis that relaxation of the rat mesenteric artery in response to insulin is mediated by K(+) channels. Two concentrations of insulin (10 and 100 mU/ml) induced relaxation of the artery by 6+/-1%, 24+/-3% (mean+/-S.E.M.). Denudation of the endothelium or precontraction by KCl (30 mM), clotrimazole (...
journal_title：European journal of pharmacology
pub_type： 杂志文章
doi：10.1016/s0014-2999(00)00892-x
更新日期：2001-01-05 00:00:00
abstract：:A close relationship between the renin-angiotensin system and the pathophysiology of diabetic retinopathy has been suggested, several angiotensin II type 1 receptor (angiotensin AT1 receptor) antagonists being effective in animal models. Therefore, we examined the efficacy of an angiotensin AT1 receptor antagonist, ol...
journal_title：European journal of pharmacology
pub_type： 杂志文章
doi：10.1016/j.ejphar.2005.02.047
更新日期：2005-04-11 00:00:00
abstract：:The treatment of rat thymocytes with 10 microM terfenadine resulted in a significant increase in DNA fragmentation. The DNA fragmentation induced by terfenadine was dependent on its concentration and incubation time. In terfenadine-treated cells, the translocation of phosphatidylserine from the inside of plasma membra...
journal_title：European journal of pharmacology
pub_type： 杂志文章
doi：10.1016/j.ejphar.2004.05.048
更新日期：2004-08-02 00:00:00
abstract：:Experiments were conducted to determine the influence of the specific ORL1 receptor agonist, nociceptin, on the cough reflex in the cat. Cats were anesthetized and allowed to breathe spontaneously. Cough was elicited by mechanical stimulation of the intrathoracic airway. Intravenous administration of nociceptin (0.001...
journal_title：European journal of pharmacology
pub_type： 杂志文章
doi：10.1016/s0014-2999(01)01244-4
更新日期：2001-10-26 00:00:00
abstract：:Epidermal growth factor (EGF) (10-100 ng ml-1) induced a rapidly developing relaxation of precontracted rabbit mesenteric artery rings within 30 min of exposure. Indomethacin or protein synthesis inhibitors prevented or acutely reversed the effect of EGF on the preparation and an erbstatin analogue significantly reduc...
journal_title：European journal of pharmacology
pub_type： 杂志文章
doi：10.1016/0014-2999(94)90164-3
更新日期：1994-06-23 00:00:00
abstract：:Kakkon-to is composed of seven medicinal herbs and exhibited novel antipyretic activity by suppressing interleukin-1alpha production responsive to interferon in a murine intranasal influenza virus infection model. Using this model, antipyretic compounds with such novel biological activities were characterized from the...
journal_title：European journal of pharmacology
pub_type： 杂志文章
doi：10.1016/s0014-2999(98)00121-6
更新日期：1998-05-01 00:00:00
abstract：:Nicotine acts as an agonist of nicotinic acetylcholine receptors. Nicotinic acetylcholine receptors play a role in the modulation of neurotransmitter release in both the central and the peripheral nervous system. Moderate reactive oxygen species levels modulate the regulation of physiological functions e.g. neurotrans...
journal_title：European journal of pharmacology
pub_type： 杂志文章
doi：10.1016/j.ejphar.2008.03.029
更新日期：2008-06-10 00:00:00
abstract：:Intake of nicotine has been related in many cases to acute or chronic hypertension. Using the patch-clamp technique the effect of nicotine on voltage-dependent K+ channel currents in rat tail artery smooth muscle cells was studied. Nicotine at concentrations of 1-100 microM or 0.3-3 mM increased or decreased, respecti...
journal_title：European journal of pharmacology
pub_type： 杂志文章
doi：10.1016/s0014-2999(98)00833-4
更新日期：1999-01-08 00:00:00
abstract：:Natural purines like ATP, ADP and adenosine have crucial roles in platelet physiology. This knowledge has been significant in drug development and today ADP receptor antagonists are widely used for prevention of thrombotic events following myocardial infarction and ischaemic stroke. Recent studies have shown that a pu...
journal_title：European journal of pharmacology
pub_type： 杂志文章
doi：10.1016/j.ejphar.2019.172428
更新日期：2019-08-15 00:00:00
abstract：:The ligand preferences of recombinant NR1 homomeric and NR1-NR2 heteromeric NMDA receptors were examined by homogenate binding assay. The binding affinities for most ligands were similar to those reported for native NMDA receptors. The order of affinity for [3H]glutamate was NR1-NR2B > NR1-NR2A approximately NR1-NR2D ...
journal_title：European journal of pharmacology
pub_type： 杂志文章
doi：10.1016/0922-4106(94)90058-2
更新日期：1994-08-16 00:00:00
abstract：:Acetylcholine releases a non-prostanoid endothelium-derived hyperpolarizing factor (EDHF) and nitric oxide from physiological salt solution perfused rat mesenteric arteries. This study reports an impairment in EDHF-mediated vasodilation in deoxycorticosterone acetate (DOCA)-salt hypertensive versus control normotensiv...
journal_title：European journal of pharmacology
pub_type： 杂志文章
doi：10.1016/j.ejphar.2003.09.005
更新日期：2003-11-14 00:00:00
abstract：:Acute benzodiazepine administration has been reported to antagonize the effect of cholecystokinin both in the periphery and in the central nervous system. A two-week treatment with either diazepam (5 mg/kg per day) or flurazepam (15 mg/kg per day) markedly reduced the excitatory effect of microiontophoretically applie...
journal_title：European journal of pharmacology
pub_type： 杂志文章
doi：10.1016/0014-2999(88)90703-0
更新日期：1988-06-22 00:00:00
abstract：:This study was designed to investigate the effect and mechanism of allicin on hyperhomocysteinemia-induced experimental vascular endothelial dysfunction in rats. Fifty male Wistar rats were randomly divided into five groups: the normal control rats (NC), the high-methionine-diet rats (Met), the high-methionine-diet ra...
journal_title：European journal of pharmacology
pub_type： 杂志文章
doi：10.1016/j.ejphar.2013.05.038
更新日期：2013-08-15 00:00:00
abstract：:We evaluated the effects of ACEA (selective cannabinoid (CB)1 receptor agonist), WIN 55,212-2 mesylate (WIN; non-selective CB1 and CB2 receptor agonist) and N-palmitoylethanolamine (PEA; an endogenous fatty acid of ethanolamide) in DBA/2 mice, a genetic model of reflex audiogenic epilepsy. PEA, ACEA or WIN intraperito...
journal_title：European journal of pharmacology
pub_type： 杂志文章
doi：10.1016/j.ejphar.2016.09.029
更新日期：2016-11-15 00:00:00
abstract：:Diphenylhydantoin (DPH) is known to be a potent anticonvulsant agent, useful in treating and preventing grand mal seizures. More recently, DPH was reported also to be a potent antiarrhythmic agent acting by means of a depressant action on the heart. The present experiments demonstrated that DPH has also a potent antia...
journal_title：European journal of pharmacology
pub_type： 杂志文章
doi：10.1016/0014-2999(75)90078-3
更新日期：1975-03-01 00:00:00
abstract：:Cysteamine (420 mg/kg s.c.) increased gastric acid secretion in rats 3-6 h post-injection; duodenal pH fell from 6.0 +/- 0.2 (S.E.M.) at 0 time to 2.2 +/- 0.3 at 12 h. A high (60-80%) incidence of duodenal ulcerations was observed 18 h after cysteamine injection. Intracisternal (i.c.) administration of bombesin (1 mic...
journal_title：European journal of pharmacology
pub_type： 杂志文章
doi：10.1016/0014-2999(82)90203-5
更新日期：1982-10-22 00:00:00
abstract：:Galantamine is efficacious for vascular dementia and Alzheimer's disease. Its application leads to some negative gastrointestinal side effects. The present study observes galantamine-induced influence on gastrointestinal motility of rats and its effects on isolated gastrointestinal smooth muscles. The gastrointestinal...
journal_title：European journal of pharmacology
pub_type： 杂志文章
doi：10.1016/j.ejphar.2004.07.054
更新日期：2004-09-13 00:00:00
abstract：:The effects of three vinca derivatives on [3H]batrachotoxin binding in rat cortical synaptosomes, on the inhibition of whole-cell Na+ currents evoked in voltage-clamped cortical neurones of the rat, on the protection against veratridine-induced cell death in cortical cultures and on the maximal electroshock-induced se...
journal_title：European journal of pharmacology
pub_type： 杂志文章
doi：10.1016/s0014-2999(96)00542-0
更新日期：1996-10-24 00:00:00
abstract：:The quaternary antagonist gallamine discriminates subpopulations of muscarinic receptors in the forebrain and brainstem of the rat and also modulates the binding of other muscarinic ligands via an allosteric mechanism in both brain regions. The calcium channel antagonist verapamil exhibits a similar allosteric effect ...
journal_title：European journal of pharmacology
pub_type： 杂志文章
doi：10.1016/0014-2999(87)90006-9
更新日期：1987-11-24 00:00:00
abstract：:One of the recognized side effects of gentamicin is ototoxicity. The mechanism underlying the organ specificity of this side effect of gentamicin has not been fully established. In view of the fact that a number of pharmacologic agents are known to form complexes with melanin and melanin is an abundant constituent of ...
journal_title：European journal of pharmacology
pub_type： 杂志文章
doi：10.1016/s0014-2999(02)01793-4
更新日期：2002-06-20 00:00:00
abstract：:Recent reports show that the nuclear factor-κB (NF-κB) can control numerous genes encoding inflammatory and nociceptive mediators and play an important role in the development of central pain sensitization. The aim of the present study is to assess the role of NF-κB signal pathway and its downstream pro-inflammatory c...
journal_title：European journal of pharmacology
pub_type： 杂志文章
doi：10.1016/j.ejphar.2012.02.017
更新日期：2012-05-05 00:00:00
abstract：:Sphingosine-1-phosphate (S1P) is a bioactive sphingolipid that contracts most smooth muscles. Although S1P has been shown to contract bladder smooth muscle, the mechanism(s) by which S1P initiates contraction has not been extensively investigated. The goal of this study was to determine if S1P-induced force generation...
journal_title：European journal of pharmacology
pub_type： 杂志文章
doi：10.1016/j.ejphar.2013.10.004
更新日期：2013-11-15 00:00:00
abstract：:The aim of this study was to investigate the effects of chronic lithium treatment on calcium (Ca2+)-stimulated adenylate cyclase activity in rat striatum and hippocampus, and to elucidate the effect of lithium treatment on the neurotransmitter/GTP-mediated inhibition of Ca2+-stimulated enzyme activity in the two brain...
journal_title：European journal of pharmacology
pub_type： 杂志文章
doi：10.1016/0014-2999(89)90796-6
更新日期：1989-09-22 00:00:00
abstract：:Adjuvant-induced arthritis is associated with body weight loss and decreased pituitary growth hormone (GH) and hepatic insulin-like growth factor-I (IGF-I) synthesis. Cytokines as tumor necrosis factor (TNF) mediate wasting associated with chronic inflammation. The aim of this study was to analyse whether the inhibiti...
journal_title：European journal of pharmacology
pub_type： 杂志文章
doi：10.1016/j.ejphar.2006.02.035
更新日期：2006-04-24 00:00:00
abstract：:The novel substituted benzamide eticlopride, (S)-(-)-5-chloro-3-ethyl-N-[(1-ethyl-2-pyrrolidinyl)methyl]-6-methoxy salicylamide hydrochloride (A38503; FLB 131), was radiolabelled to high specific activity and used for in vivo receptor binding studies in the rat brain. Intravenous injections of [3H]eticlopride resulted...
journal_title：European journal of pharmacology
pub_type： 杂志文章
doi：10.1016/0014-2999(86)90543-1
更新日期：1986-01-21 00:00:00
