Abstract:
:5-Cyclopropyl-2-[1-(2-fluoro-benzyl)-1H-pyrazolo[3,4-b]pyridin-3-yl]-pyrimidin-4-ylamine (BAY 41-2272) is a potent soluble guanylyl cyclase stimulator in a nitric oxide (NO)-independent manner. The relaxant effect of BAY 41-2272 was investigated in rabbit and human corpus cavernosum in vitro. BAY 41-2272 (0.01-10 microM) relaxed both rabbit (pEC(50)=6.82+/-0.06) and human (pEC(50)=6.12+/-0.10) precontracted cavernosal strips. The guanylyl cyclase inhibitor (ODQ, 10 microM) caused significant rightward shifts in the concentration-response curves for BAY 41-2272 in rabbit (4.7-fold) and human (2.3-fold) tissues. The NO synthesis inhibitor (N-nitro-L-arginine methyl ester (L-NAME), 100 microM) also produced similar rightward shifts, revealing that BAY 41-2272 acts synergistically with endogenous NO to elicit its relaxant effect. The results also indicate that ODQ is selective for the NO-stimulated enzyme, since relaxations evoked by BAY 41-2272 were only partly attenuated by ODQ. The present study shows that both BAY 41-2272 and sildenafil evoke relaxations independent of inhibition of haem in soluble guanylate cyclase. Moreover, there is no synergistic effect of the two compounds in corpus cavernosum.
journal_name
Eur J Pharmacoljournal_title
European journal of pharmacologyauthors
Baracat JS,Teixeira CE,Okuyama CE,Priviero FB,Faro R,Antunes E,De Nucci Gdoi
10.1016/j.ejphar.2003.08.012keywords:
subject
Has Abstractpub_date
2003-09-12 00:00:00pages
163-9issue
2eissn
0014-2999issn
1879-0712pii
S0014299903022064journal_volume
477pub_type
杂志文章abstract::Disturbances in oxidative metabolism are involved in many acute and chronic diseases, as well as in several other conditions. The objective of the present study was to examine the relationship between the level of intracellular reactive oxygen species in the peripheral blood granulocytes of mice, as evaluated by 2',7'...
journal_title:European journal of pharmacology
pub_type: 杂志文章
doi:10.1016/j.ejphar.2009.11.001
更新日期:2010-02-10 00:00:00
abstract::Increased phasic activity in the bladder smooth muscle of animal models and patients with detrusor overactivity has been suggested to underlie the pathophysiology of overactive bladder. Potassium (K+) channels are key regulators of bladder smooth muscle tone and thus may play a role in this altered phasic activity. In...
journal_title:European journal of pharmacology
pub_type: 杂志文章
doi:10.1016/j.ejphar.2011.03.053
更新日期:2011-06-25 00:00:00
abstract::Molecular mechanisms responsible for diabetes-induced testicular dysfunction are not well understood. This study investigated oxidative stress, stage-dependent DNA base modification and expression of poly (ADP ribose) polymerase 1 (PARP1) in the testes of streptozotocin-induced diabetic rats. Hyperglycemia led to test...
journal_title:European journal of pharmacology
pub_type: 杂志文章
doi:10.1016/j.ejphar.2014.05.005
更新日期:2014-08-15 00:00:00
abstract::No effective chemopreventive agent has been approved against hepatocellular carcinoma (HCC) to date. Since HCC is one of the hypervascular solid tumors, blocking angiogenesis represents an intriguing approach to HCC chemoprevention. The aim of the current study was to examine the combined effect of the anti-angiogenic...
journal_title:European journal of pharmacology
pub_type: 杂志文章
doi:10.1016/j.ejphar.2013.11.022
更新日期:2014-01-15 00:00:00
abstract::The aim of the present study was to examine the influence of ifenprodil (a non-competitive NMDA receptor antagonist which also blocks 5-HT3 receptors and alpha1-adrenoceptors) on the effects of ethanol in the mouse in vivo and to elucidate the role of various receptors in these actions. The ethanol (4 g/kg i.p.)-induc...
journal_title:European journal of pharmacology
pub_type: 杂志文章
doi:10.1016/s0014-2999(99)00393-3
更新日期:1999-07-14 00:00:00
abstract::Ascorbate has both antioxidant and pro-oxidant activities. We have previously shown that plasma levels of ascorbate induce constriction and blockade of dilatation mediated by endothelium-derived hyperpolarizing factor (EDHF). In this study we sought to determine if these detrimental actions were mediated by a prooxida...
journal_title:European journal of pharmacology
pub_type: 杂志文章
doi:10.1016/j.ejphar.2009.04.033
更新日期:2009-07-01 00:00:00
abstract::Sulfonylurea drugs exert their insulinotropic action by inhibiting ATP-sensitive potassium channels in the pancreas. However, these channels are also expressed in myocardial and vascular smooth muscle, implicating possible detrimental cardiovascular effects. Aim of the present study was to investigate the inhibitory p...
journal_title:European journal of pharmacology
pub_type: 杂志文章
doi:10.1016/j.ejphar.2012.02.006
更新日期:2012-04-15 00:00:00
abstract::Hepatocellular carcinoma (HCC), as the commonest type in liver cancer, is in urgent need for better treatment target due to its high mortality and poor prognosis. The involvement of angiogenesis in HCC has been identified by multiple studies, but the underlying mechanism remains unclear. Long non-coding RNAs (LncRNAs)...
journal_title:European journal of pharmacology
pub_type: 杂志文章
doi:10.1016/j.ejphar.2019.01.049
更新日期:2019-04-15 00:00:00
abstract::We have cloned the calf predominant pancreatic cholecystokinin B (CCKB)/gastrin receptor cDNA. It encodes a 454 amino acid protein with 90% identity with the CCKB/gastrin receptor cloned in other species and tissues. However, the calf pancreatic CCKB/gastrin receptor contains a pentapeptide cassette within the third i...
journal_title:European journal of pharmacology
pub_type: 杂志文章
doi:10.1016/0014-2999(95)00737-7
更新日期:1996-02-15 00:00:00
abstract::We have studied the effects of selective and non-selective adenosine receptor agonists and antagonists in audiogenic-seizure-sensitive DBA/2 mice, an animal model of generalized reflex epilepsy. With the exception of the adenosine A3 receptor agonist, N6-(3-iodobenzyl)-5'-N-methylcarboxamidoadenosine (IB-MECA), all th...
journal_title:European journal of pharmacology
pub_type: 杂志文章
doi:10.1016/s0014-2999(99)00132-6
更新日期:1999-04-29 00:00:00
abstract::Administration of the non-competitive NMDA receptor antagonist MK-801 (5-methyl-10,11-dihydro-5H-dibenzo[1,d]cyclohepten-5,10-imine) produces paradoxical neurotoxicity in limbic cortical regions which includes the entorhinal cortex. The expression of NMDAR-2C but not -2A, -2B or -2D subunits was significantly decrease...
journal_title:European journal of pharmacology
pub_type: 杂志文章
doi:10.1016/s0014-2999(96)00933-8
更新日期:1997-01-14 00:00:00
abstract::Intracellular Ca2+ overload induced by hypoxia-reoxygenation alters Ca2+ homeostasis, which plays an important role in myocardial cell injury. Even though propofol is known as a radical scavenger with Ca2+ channel blocking properties, little is known about cardioprotective effect associated with Ca2+ homeostasis in ca...
journal_title:European journal of pharmacology
pub_type: 杂志文章
doi:10.1016/j.ejphar.2008.07.027
更新日期:2008-10-10 00:00:00
abstract::This study evaluated the possible involvement of 5-HT(2B) receptors in long-lasting hypotension to 5-hydroxytryptamine (5-HT), which is predominantly mediated by 5-HT7 receptors, in anaesthetised vagosympathectomized rats. Intravenous injections of 5-HT and 5-carboxamidotryptamine (5-CT) elicited a dose-dependent hypo...
journal_title:European journal of pharmacology
pub_type: 杂志文章
doi:10.1016/j.ejphar.2004.08.050
更新日期:2004-10-19 00:00:00
abstract::MK-801 (a potent non-competitive antagonist of N-methyl-D-aspartic acid-mediated events) in subcutaneous doses of 0.1 and 0.2 mg/kg increased the threshold for electroconvulsions and in doses of 0.0031 and 0.0125 mg/kg enhanced the protective activity of valproate against maximal electroshock-induced convulsions in mi...
journal_title:European journal of pharmacology
pub_type: 杂志文章
doi:10.1016/0014-2999(91)90582-b
更新日期:1991-08-06 00:00:00
abstract::Thiorphan, the potent inhibitor of 'enkephalinase', has shown some analgesic properties in experimental animals and in man. The possibility that the intravenous infusion of acetorphan, a prodrug of thiorphan (26 micrograms/kg per min for 60 min), can inhibit plasma and cerebrospinal fluid (CSF) enkephalinase in man in...
journal_title:European journal of pharmacology
pub_type: 杂志文章
doi:10.1016/0014-2999(86)90094-4
更新日期:1986-06-05 00:00:00
abstract::A large body of evidence has shown that the Corticotropin Releasing Factor (CRF) system, which plays a key role in stress modulation, is deeply involved in relapse to alcohol seeking induced by exposure to stressful events such as foot shock or yohimbine injections. Exposure to environmental cues is also known to be a...
journal_title:European journal of pharmacology
pub_type: 杂志文章
doi:10.1016/j.ejphar.2016.06.020
更新日期:2016-10-05 00:00:00
abstract::Clozapine has improved efficacy relative to typical antipsychotics in schizophrenia treatment, particularly regarding emotional symptoms. However, the mechanisms underlying its therapeutic benefits remain unclear. Using a methamphetamine-sensitised rat model, we measured changes in dopamine levels in the amygdalae in ...
journal_title:European journal of pharmacology
pub_type: 杂志文章
doi:10.1016/j.ejphar.2016.04.013
更新日期:2016-06-15 00:00:00
abstract::The efficacy of cetirizine in comparison with meclizine, another piperazine H1 receptor antagonist, in rat pleurisy caused by allergen or autacoid was investigated. Sensitization was achieved by subcutaneous injection of a mixture of ovalbumin and aluminium hydroxide. Fourteen days later, the animals were challenged w...
journal_title:European journal of pharmacology
pub_type: 杂志文章
doi:10.1016/0014-2999(92)90811-h
更新日期:1992-11-13 00:00:00
abstract::The Ah receptor (AhR) mediates many, if not all, of the toxic and biological effects of 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD, dioxin) and related halogenated aromatic hydrocarbons. Although wide variations in species sensitivity to these compounds have been observed, numerous biochemical and physiochemical charac...
journal_title:European journal of pharmacology
pub_type: 杂志文章
doi:10.1016/0926-6917(92)90016-6
更新日期:1992-09-01 00:00:00
abstract::Acetyl-CoA acetyltransferase (1-O-alkyl-sn-glycero-3-phosphocholine) is a key enzyme in paf-acether biosynthesis. Its immunological activation as related to paf-acether formation was investigated in mast cells derived from mouse bone marrow. The action of ketotifen, a prophylactic anti-asthma drug, on the antigen-indu...
journal_title:European journal of pharmacology
pub_type: 杂志文章
doi:10.1016/0014-2999(87)90511-5
更新日期:1987-12-01 00:00:00
abstract::Previous studies have shown that chronic treatment with antidepressants (AD) leads to an increased responsiveness of NA systems to noradrenaline (NA) or its agonist. In the present paper the influence is described of a prolonged treatment with AD of different pharmacological profiles on the effect of reserpine in the ...
journal_title:European journal of pharmacology
pub_type: 杂志文章
doi:10.1016/0014-2999(83)90087-0
更新日期:1983-03-04 00:00:00
abstract::The aim of the present study was to further characterize [3H]clonidine binding in the ventrolateral medulla of the human brainstem, the region involved in the vasodepressor effect of imidazoline drugs of the clonidine type. Under basal conditions, [3H]clonidine can bind both to the imidazoline receptors and to the alp...
journal_title:European journal of pharmacology
pub_type: 杂志文章
doi:10.1016/0922-4106(94)90205-4
更新日期:1994-01-01 00:00:00
abstract::Intracerebroventricular (i.c.v.) or intravenous (i.v.) administration of morphine (10 micrograms or 25 mg/kg, respectively) increased the mortality rate in experimental anaphylaxis in mice. This effect was blocked by the opiate antagonist naltrexone administered systemically (5 mg/kg) or i.c.v. (10 micrograms). Moreov...
journal_title:European journal of pharmacology
pub_type: 杂志文章
doi:10.1016/0014-2999(83)90274-1
更新日期:1983-11-11 00:00:00
abstract::The humanized anti-CD52 antibody alemtuzumab is successfully used in the treatment of multiple sclerosis (MS) and is thought to exert most of its therapeutic action by depletion and repopulation of mainly B and T lymphocytes. Although neuroprotective effects of alemtuzumab have been suggested, direct effects of anti-C...
journal_title:European journal of pharmacology
pub_type: 杂志文章
doi:10.1016/j.ejphar.2020.172923
更新日期:2020-03-15 00:00:00
abstract::Liver fibrosis is involved in the progression of most chronic liver diseases. Even though we have made a huge progress in order to understand the pathogenesis of liver fibrosis, however, there is still a lack of productive treatments. Being a traditional Chinese medicine, Platycodin D (PD), an oleanane kind of triterp...
journal_title:European journal of pharmacology
pub_type: 杂志文章
doi:10.1016/j.ejphar.2020.172946
更新日期:2020-06-05 00:00:00
abstract::Plasma concentrations of unchanged dihydroergotamine (DHE) were measured in beagle dogs on days 1 and 7 of a 1 week treatment with daily oral doses of DHE. Responses to both 5-HT and noradrenaline were monitored isometrically on spiral strips from saphenous arteries and femoral veins removed 24 and 72 h after the last...
journal_title:European journal of pharmacology
pub_type: 杂志文章
doi:10.1016/0014-2999(83)90601-5
更新日期:1983-04-22 00:00:00
abstract::Using isolated rabbit gastric glands, the H2-receptor antagonist MK-208 was investigated with respect to its effects on [14C]aminopyrine uptake as an index of gastric acid secretion. In addition to shifting the histamine concentration-response curve to the right in a parallel fashion, the antagonism produced by MK-208...
journal_title:European journal of pharmacology
pub_type: 杂志文章
doi:10.1016/0014-2999(84)90733-7
更新日期:1984-11-13 00:00:00
abstract::The calcium sensitivity of ouabain-induced contractions of aortic strips from spontaneously hypertensive rat (SHR) was examined using several drugs which affect Na+ and Ca2+ movements across the cell membrane, and the results were compared with those obtained with age-matched Wistar-Kyoto rat (WKY). The Ca2+ concentra...
journal_title:European journal of pharmacology
pub_type: 杂志文章
doi:10.1016/0014-2999(90)94121-d
更新日期:1990-11-06 00:00:00
abstract::High pressure liquid chromatography (HPLC) combined with radiochemical detection was used to show that [3H]noradrenaline (NA) and [14C]ATP were released concomitantly during field stimulation of the rat vas deferens. The release of radioactivity (3H and 14C) in response to three consecutive field stimulations was cons...
journal_title:European journal of pharmacology
pub_type: 杂志文章
doi:10.1016/0014-2999(88)90254-3
更新日期:1988-12-06 00:00:00
abstract::Many central stimulating drugs have a pronounced stimulatory effect on striatal and cortical activity which is associated to enhanced function of mesencephalic dopaminergic neurons. Mesencephalic KCNQ (also termed K(v)7) potassium channels suppress the basal activity of dopaminergic neurons in the substantia nigra and...
journal_title:European journal of pharmacology
pub_type: 杂志文章
doi:10.1016/j.ejphar.2007.05.029
更新日期:2007-09-10 00:00:00