Abstract:
:Recent studies suggest that endocannabinoid signaling is modulated by 17β-estradiol (17Eβ) however it is unclear if this applies to the cardiovascular actions of anandamide, a major endocannabinoid. This study examined the in vitro effects of 17Eβ on vasorelaxation to anandamide in myograph-mounted small mesenteric arteries obtained from Wistar rats and Spontaneously Hypertensive Rats (SHRs) of both sexes. Treatment with 1μM 17Eβ but not its enantiomer 17Eα significantly enhanced relaxation to anandamide in male Wistar rats. This effect was independent of a functional endothelium but was blocked by the Transient Receptor Potential Vanilloid type 1 (TRPV1) receptor antagonist SB366791 (2μM) or prolonged treatment with the TRPV1 agonist capsaicin (10μM). A TRPV1-dependent potentiation by 17Eβ was also observed in male SHRs, but not in female Wistar rats or female SHRs. Whilst inhibition of anandamide hydrolysis by 1μM URB597 (an inhibitor of fatty acid amide hydrolase; FAAH) similarly augmented anandamide relaxation in male, but not female, Wistar rats and SHRs, URB597 did not affect the 17Eβ-induced potentiation. Female SHRs displayed a larger maximal relaxation to anandamide; however sex difference was not found in Wistar rats. We conclude that pharmacological levels of 17Eβ potentiate mesenteric relaxation to anandamide through mechanisms dependent on TRPV1 receptors but not FAAH-mediated hydrolysis in male Wistar rats and male SHRs. Sexual dimorphism was observed in the modulatory effects of 17Eβ and URB597, which does not necessarily lead to a greater anandamide response in female rats.
journal_name
Eur J Pharmacoljournal_title
European journal of pharmacologyauthors
Ho WSdoi
10.1016/j.ejphar.2013.01.002subject
Has Abstractpub_date
2013-02-15 00:00:00pages
49-56issue
1-3eissn
0014-2999issn
1879-0712pii
S0014-2999(13)00007-1journal_volume
701pub_type
杂志文章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::In the burying behaviour test allopregnanolone (0.5 mg/rat) reduced the cumulative time of burying, interpreted as a reduction in anxiety. The selective benzodiazepine antagonist, flumazenil (5 and 10 mg/kg), did not affect the burying behaviour when administered alone but effectively prevented the reduction produced ...
journal_title:European journal of pharmacology
pub_type: 杂志文章
doi:10.1016/0014-2999(95)00311-8
更新日期:1995-07-25 00:00:00
abstract::Soluble amyloid β-protein (Aβ) oligomers are primary mediators of synaptic dysfunction associated with the progression of Alzheimer's disease. Such Aβ oligomers exist dependent on their rates of aggregation and metabolism. Use of selective somatostatin receptor-subtype agonists have been identified as a potential mean...
journal_title:European journal of pharmacology
pub_type: 杂志文章
doi:10.1016/j.ejphar.2012.03.020
更新日期:2012-05-15 00:00:00
abstract::We investigated the role of hippocampal group I metabotropic glutamate receptors (mGlu(1) receptors) in the retrieval process of spatial memory using 8-arm radial maze performance with 4 arms baited. In addition, the participation of the cholinergic system in memory deficits induced by mGlu(1) receptors antagonist was...
journal_title:European journal of pharmacology
pub_type: 杂志文章
doi:10.1016/j.ejphar.2007.07.010
更新日期:2007-12-01 00:00:00
abstract::Canine cerebral arterial strips denuded of endothelium responded to nicotine and transmural electrical stimulation with relaxations, which were abolished by NG-nitro-L-arginine and methylene blue. Magnitudes of relaxation did not differ in the arteries contracted with prostaglandin F2alpha and sumatriptan, an effectiv...
journal_title:European journal of pharmacology
pub_type: 杂志文章
doi:10.1016/s0014-2999(01)01019-6
更新日期:2001-05-18 00:00:00
abstract::The involvement of delta opioid receptors in supraspinal analgesia was investigated. With this aim, opioids that produced analgesia in the tail immersion test were administered i.c.v. to mice a few minutes before the irreversible antagonist, beta-funaltrexamine (beta-FNA). Protection of the respective analgesic effect...
journal_title:European journal of pharmacology
pub_type: 杂志文章
doi:10.1016/0014-2999(89)90038-1
更新日期:1989-01-02 00:00:00
abstract::Evidence suggests that insulin has direct, potent and physiologically relevant vasodilatory effects. This has led to the hypothesis that in states of insulin resistance, insulin's vasodilatory effects may be blunted leading to an increase in vascular tone and blood pressure. To examine this proposition we studied the ...
journal_title:European journal of pharmacology
pub_type: 杂志文章
doi:10.1016/s0014-2999(97)00104-0
更新日期:1997-03-19 00:00:00
abstract::Stonefish skin secretion contains a smooth muscle relaxant, synancein II, that selectively inhibits tonic responses of KCl-induced contractions of the guinea-pig vas deferens. Synancein II (5-50 micrograms/ml) and nifedipine (10(-8)-10(-7) M) reduced tonic responses equally. Over these concentrations, synancein II inh...
journal_title:European journal of pharmacology
pub_type: 杂志文章
doi:10.1016/0014-2999(86)90341-9
更新日期:1986-09-23 00:00:00
abstract::The imidazopyridines EMD 35993 and EMD 41717 antagonized the anticonflict actions of diazepam and chlordiazepoxide in rodent models which are predictive for anxiolytic action in man. In contrast to other described benzodiazepine antagonists, these compounds did not antagonize either the anticonvulsant or muscle relaxa...
journal_title:European journal of pharmacology
pub_type: 杂志文章
doi:10.1016/0014-2999(83)90582-4
更新日期:1983-04-08 00:00:00
abstract::The effects of THIP and isoguvacine on 3H-flunitrazepam binding to washed membranes prepared from the cerebral cortex of adult rats have been examined. THIP, which has only minimal stimulatory effects on benzodiazepine (BZ) receptor binding, has been found to inhibit the stimulation induced by small concentrations (2 ...
journal_title:European journal of pharmacology
pub_type: 杂志文章
doi:10.1016/0014-2999(79)90321-2
更新日期:1979-10-15 00:00:00
abstract::Pretreatment of chick biventer cervicis preparations with ethanol (290 mM) potentiated the EC50 of choline, acetylcholine, carbachol and phenyltrimethylammonium 91%, 319%, 97% and 213%, respectively. Perhaps this interaction of ethanol and neurotransmitter could contribute to the effects on coordination and motor acti...
journal_title:European journal of pharmacology
pub_type: 杂志文章
doi:10.1016/0014-2999(80)90165-x
更新日期:1980-01-25 00:00:00
abstract::A sensitive high pressure liquid chromatography (HPLC) method was used to measure acetylcholine release from canine bronchial tissue in response to electrical stimulation. Indomethacin enhanced the efflux of acetylcholine, an effect that was reversed by the addition of prostaglandin E2 (PGE2). Prostaglandin D2 (PGD2) ...
journal_title:European journal of pharmacology
pub_type: 杂志文章
doi:10.1016/0014-2999(89)90451-2
更新日期:1989-08-29 00:00:00
abstract::Metformin administration has been reported to influence the carotid intima-media thickness (CIMT) in humans. However, since previously conducted studies have yielded inconsistent results, the exact effect of metformin on CIMT remains unclear. Causes that could lead to inconsistency in reported research could be the du...
journal_title:European journal of pharmacology
pub_type: 杂志文章
doi:10.1016/j.ejphar.2020.173458
更新日期:2020-11-05 00:00:00
abstract::In order to elucidate the signal transduction pathway of vascular smooth muscle contraction induced by the activation of receptors for angiotensin II and endothelin-1, we examined whether tyrosine kinases and mitogen-activated protein (MAP) kinases are involved in the development of force of contraction in the rat aor...
journal_title:European journal of pharmacology
pub_type: 杂志文章
doi:10.1016/s0014-2999(02)01790-9
更新日期:2002-06-12 00:00:00
abstract::To investigate the role of ATP-sensitive K+(KATP) channels on pacemaker activity in interstitial cells of Cajal (ICC), whole-cell patch clamping, RT-PCR, and intracellular Ca2+([Ca2+]i) imaging were performed in cultured colonic ICC. Pinacidil (a K+ channel opener) hyperpolarized the membrane and inhibited the generat...
journal_title:European journal of pharmacology
pub_type: 杂志文章
doi:10.1016/j.ejphar.2017.05.029
更新日期:2017-08-15 00:00:00
abstract::Bimoclomol is a new compound that improves cell survival under experimental stress conditions partly by increasing intracellular heat shock proteins (HSPs). HSPs, especially HSP70, play a cytoprotective role in the rat heart. Rat neonatal cardiomyocytes were used to determine the ability of bimoclomol to induce HSP70 ...
journal_title:European journal of pharmacology
pub_type: 杂志文章
doi:10.1016/s0014-2999(01)01551-5
更新日期:2002-01-18 00:00:00
abstract::Hypoxia-inducible factor prolyl hydroxylases (PHDs) inhibitor stabilizes hypoxia inducible factor alpha, which increases erythropoietin (EPO) expression via the hypoxia response element. Therefore, PHDs inhibitors have been developed as novel therapeutic agents for anemia. Here, we characterize the in vitro and in viv...
journal_title:European journal of pharmacology
pub_type: 杂志文章
doi:10.1016/j.ejphar.2018.08.044
更新日期:2018-11-05 00:00:00
abstract::Glucocorticoids bind to and activate a cytoplasmic glucocorticoid receptor. The activated glucocorticoid receptor translocates into the nucleus and binds to specific response elements in the promoter regions of anti-inflammatory genes such as lipocortin-1 and secretory leukocyte protease inhibitor (SLPI). However, the...
journal_title:European journal of pharmacology
pub_type: 杂志文章,评审
doi:10.1016/j.ejphar.2004.07.011
更新日期:2004-10-01 00:00:00
abstract::Acid-sensing ion channels (ASICs) are involved in numerous physiological and pathological processes in the central nervous system. Development of pharmacological tools capable to inhibit or potentiate these channels is important for our knowledge about roles of ASICs in the neuronal network and can be promising for tr...
journal_title:European journal of pharmacology
pub_type: 杂志文章
doi:10.1016/j.ejphar.2016.06.013
更新日期:2016-10-05 00:00:00
abstract::Nitric oxide (NO) is continuously produced in the lung and can be measured in exhaled gas of different species. To investigate a possible neuro-humoral regulation of pulmonary NO production in vivo we injected veratrine, an activator of Na(+) channels known to activate the sympathoadrenal system, in anaesthetized, mec...
journal_title:European journal of pharmacology
pub_type: 杂志文章
doi:10.1016/s0014-2999(00)00930-4
更新日期:2001-01-12 00:00:00
abstract::Clinical evidence indicates an antiarrhythmic effect of sulfonylureas, which might be blunted by their vascular action. We wanted to investigate the effect of glibenclamide and the new sulfonylthiourea compound 1-[[5-[2-(5-chloro-o-anisamido)ethyl]-2-methoxyphenyl]-sulfonyl]-3 -me thylthiourea (HMR1883) on cardiac ele...
journal_title:European journal of pharmacology
pub_type: 杂志文章
doi:10.1016/s0014-2999(00)00322-8
更新日期:2000-06-16 00:00:00
abstract::A previous report showed that transforming growth factor-beta1 (TGF-beta1) can induce heme oxygenase-1 (HO-1) expression, attenuate cellular injury, and maintain tissue homeostasis. In this study, we investigated the involvement of phosphoinositide-3-OH-kinase (PI3K)/Akt and the nuclear factor-kappaB (NF-kappaB) signa...
journal_title:European journal of pharmacology
pub_type: 杂志文章
doi:10.1016/j.ejphar.2007.01.025
更新日期:2007-04-10 00:00:00
abstract::Sanguinarine is a natural isoquinoline alkaloid derived from the root of Sanguinaria canadensis and from other poppy fumaria species, and is known to have a broad spectrum of pharmacological properties. Here we have found that sanguinarine, at low micromolar concentrations, showed a remarkably rapid killing activity a...
journal_title:European journal of pharmacology
pub_type: 杂志文章
doi:10.1016/j.ejphar.2013.02.035
更新日期:2013-04-05 00:00:00
abstract::Baicalein was a major bioactive flavonoid derived from Radix Scutellariae in Xiao-Chai-Hu-Tang which was commonly used to treat chronic hepatitis and liver fibrosis in China. The aim of this study was to assess whether chronic baicalein administration could prevent liver fibrosis induced by carbon tetrachloride (CCl(4...
journal_title:European journal of pharmacology
pub_type: 杂志文章
doi:10.1016/j.ejphar.2010.01.002
更新日期:2010-04-10 00:00:00
abstract::Tardive dyskinesia is a serious motor side effect of chronic neuroleptic therapy. Chronic treatment or rats with neuroleptics leads to the development of abnormal oral movements called vacuous chewing movements. Vacuous chewing movements in rats are widely accepted as an animal model of tardive dyskinesia. Atypical an...
journal_title:European journal of pharmacology
pub_type: 杂志文章
doi:10.1016/s0014-2999(01)01284-5
更新日期:2001-09-28 00:00:00
abstract::The corticotropin releasing factor (CRF) family includes CRF and urocortin. The effects of urocortin and CRF (0.3, 1, 3 and 10 nmol/kg, i.v.) relative to those of vehicle (0.9% NaCl) on mean arterial pressure and mean circulatory filling pressure (index of venous tone) were examined in conscious, unrestrained rats tha...
journal_title:European journal of pharmacology
pub_type: 杂志文章
doi:10.1016/j.ejphar.2005.01.022
更新日期:2005-03-07 00:00:00
abstract::The Role of protein kinase C in the modulatory effect of a mu-opioid receptor agonist, [D-Ala(2),N-Me-Phe(4),Gly(5)-ol]enkephalin (DAMGO), on the glycine-gated Cl(-) current was examined in acutely dissociated rat periaqueductal gray neurons. Using the nystatin-perforated patch-clamp technique, the neurons were voltag...
journal_title:European journal of pharmacology
pub_type: 杂志文章
doi:10.1016/s0014-2999(01)01397-8
更新日期:2001-11-16 00:00:00
abstract::Curcumin, main compound obtained from rizhoma of Curcuma longa, shows antitumoral, antioxidant, anticarcinogenic and gastric protective properties. Recently, it has been demonstrated that curcumin exerts its gastric protective action due to an increase in gastric nitric oxide (NO) levels. However, it is unknown whethe...
journal_title:European journal of pharmacology
pub_type: 杂志文章
doi:10.1016/j.ejphar.2014.02.030
更新日期:2014-05-05 00:00:00
abstract::The zero-trans influx of uridine in human erythrocytes is inhibited by lidoflazine and analogs thereof. The concentrations required for inhibition of nucleoside transport were higher when the compounds were simultaneously added with uridine than upon preincubation of the inhibitors with the erythrocytes. R70380 proved...
journal_title:European journal of pharmacology
pub_type: 杂志文章
doi:10.1016/0922-4106(90)90040-5
更新日期:1990-12-15 00:00:00
abstract::The anticonvulsant activity of riluzole against sound-induced seizures was studied in the DBA/2 mouse model. Riluzole (0.1-4 mg kg(-1), intraperitoneal (i.p.)) produced dose-dependent effects with ED(50) values for the suppression of tonic, clonic and wild running phases of 0.72, 1.38 and 2.71 mg kg(-1), respectively....
journal_title:European journal of pharmacology
pub_type: 杂志文章
doi:10.1016/s0014-2999(00)00709-3
更新日期:2000-11-10 00:00:00