Abstract：
:Whole-cell patch-clamp recordings investigated the electrophysiological effects of 2'-hydroxy-4'-methoxyacetophenone (paeonol), one of the major components of Moutan Cortex, in hippocampal CA1 neurons and nucleus ambiguus (NA) neurons from neonatal rats as well as in lung epithelial H1355 cells expressing Kv2.1 or Kv1.2. Extracellular application of paeonol at 100μM did not significantly affect the spontaneous action potential frequency, whereas paeonol at 300μM increased the frequency of spontaneous action potentials in hippocampal CA1 neurons. Paeonol (300μM) significantly decreased the tetraethylammonium-sensitive outward current in hippocampal CA1 neurons, but had no effect upon the fast-inactivating potassium current (IA). Extracellular application of paeonol at 300μM did not affect action potentials or the delayed outward currents in NA neurons. Paeonol (100μM) reduced the Kv2.1 current in H1355 cells, but not the Kv1.2 current. The inhibitor of Kv2, guangxitoxin-1E, reduced the delayed outward potassium currents in hippocampal neurons, but had only minimal effects in NA neurons. We demonstrated that paeonol decreased the delayed outward current and increased excitability in hippocampal CA1 neurons, whereas these effects were not observed in NA neurons. These effects may be associated with the inhibitory effects on Kv2.1 currents.
journal_name
Eur J Pharmacoljournal_title
European journal of pharmacologyauthors
Yang CT,Leung YM,Hsu SF,MacDonald I,Wang ML,Lin JG,Hung SY,Chen YHdoi
10.1016/j.ejphar.2016.04.057subject
Has Abstractpub_date
2016-08-05 00:00:00pages
49-60eissn
0014-2999issn
1879-0712pii
S0014-2999(16)30311-9journal_volume
784pub_type
杂志文章abstract：:To investigate the effect of a single and multiple administration of lysergic acid diethylamide (LSD) on cerebral metabolism of dopamine and serotonin, male Wistar rats were treated with low and high doses (0.1 and 2.0 mg/kg i.p.) of LSD and the levels of dopamine, 3,4-dihydroxyphenylacetic acid, homovanillic acid, 3-...
journal_title：European journal of pharmacology
pub_type： 杂志文章
doi：10.1016/s0014-2999(97)01025-x
更新日期：1997-07-30 00:00:00
abstract：:Certain enkephalin analogues, including those which contain the conformationally restricted amino acid E-(2R,3S)-cyclopropylphenylalanine [2R,3S)-delta E Phe), have been shown to have high affinity for brain delta opioid receptors but are much less active in mouse vas deferens bioassays. To investigate whether there a...
journal_title：European journal of pharmacology
pub_type： 杂志文章
doi：10.1016/0014-2999(90)90556-l
更新日期：1990-02-20 00:00:00
abstract：:The peptides for-Met-Leu-Tyr-OMe, for-Met-Leu-Glu-OMe, for-Met-Leu-Asp-OMe and for-Met-Leu-Ser-OMe were synthesized to investigate the importance of a hydrophilic side chain of the residue at position 3 on biological activities of human neutrophils. A number of in vitro essays were carried out, including: chemotaxis, ...
journal_title：European journal of pharmacology
pub_type： 杂志文章
doi：10.1016/s0014-2999(03)01672-8
更新日期：2003-05-23 00:00:00
abstract：:We aimed at investigating the influence of clomipramine and selegiline administered in vivo in mice on lymphocyte subsets in lymphoid organs and SRBC-induced humoral immune response. Balb/c mice were given 7 or 14 oral doses (1 mg/kg) of selegiline or clomipramine. Lymphocyte B and T subsets and splenic regulatory T c...
journal_title：European journal of pharmacology
pub_type： 杂志文章
doi：10.1016/j.ejphar.2020.173560
更新日期：2020-11-15 00:00:00
abstract：:Endotoxin tolerance is a mechanism in which cells receiving low doses of endotoxin, enter a transient phase with less inflammatory response to the next endotoxin challenges. Central nervous system is known to modulate systemic inflammation through activation of the cholinergic system; however, the role of central anti...
journal_title：European journal of pharmacology
pub_type： 杂志文章
doi：10.1016/j.ejphar.2014.06.050
更新日期：2014-10-05 00:00:00
abstract：:The rapid breakout of the coronavirus disease of 2019 (COVID-19) has been declared pandemic with serious global concern due to high morbidity and mortality. As we enter the phase beyond limitations there is an urgent need for explicit treatment against COVID-19. To face this immediate global challenge, drug developmen...
journal_title：European journal of pharmacology
pub_type： 杂志文章
doi：10.1016/j.ejphar.2020.173496
更新日期：2020-10-15 00:00:00
abstract：:Pulmonary hypertension (PH) mainly results from excessive proliferation of pulmonary artery smooth muscle cells (PASMCs) and displays mitochondrial abnormalities such as mitochondrial fragmentation. Epigallocatechin-3-gallate (EGCG), an efficient antiproliferative compound in green tea, has recently been demonstrated ...
journal_title：European journal of pharmacology
pub_type： 杂志文章
doi：10.1016/j.ejphar.2017.05.003
更新日期：2017-08-15 00:00:00
abstract：:We examined whether the proteinase-activated receptor-2 (PAR2) agonist, H-Ser-Leu-Ile-Gly-Arg-Leu-NH2 (SLIGRL-NH2), could induce scratching behavior in mice. Intradermal injections of SLIGRL-NH2 (10-50 microg) evoked dose dependent scratching. This behavior peaked near 5 min and returned to preinjection levels within ...
journal_title：European journal of pharmacology
pub_type： 杂志文章
doi：10.1016/j.ejphar.2005.11.012
更新日期：2006-01-20 00:00:00
abstract：:Pretreatment with the non-competitive NMDA (N-methyl-D-aspartate) antagonist MK801 (0.5, 1.0 mg/kg, s.c.) suppressed the behavioral signs of withdrawal in morphine-dependent rats. However, the same doses of MK801 that suppressed morphine withdrawal also simultaneously produced phencyclidine (PCP)-like behaviors. Pretr...
journal_title：European journal of pharmacology
pub_type： 杂志文章
doi：10.1016/0014-2999(91)90358-w
更新日期：1991-05-02 00:00:00
abstract：:To shed light on the discrepancy between reported binding and functional affinity and selectivity at alpha(1b/B)-adrenoceptors, the antagonist (+)-cyclazosin was reinvestigated in rat and rabbit tissues. It displayed a competitive antagonism at alpha(1A) and alpha(1D)-adrenoceptors of rat prostatic vas deferens and ao...
journal_title：European journal of pharmacology
pub_type： 杂志文章
doi：10.1016/j.ejphar.2005.08.044
更新日期：2005-10-17 00:00:00
abstract：:Previous results provided evidence for an inhibitory GABAergic influence on the dopamine neurons of the rat retina, without proving that endogenous GABA physiologically regulates the activity of these cells. We injected picrotoxinin intraocularly to dark-adapted rats and measured retinal dopamine turnover. Dopamine wa...
journal_title：European journal of pharmacology
pub_type： 杂志文章
doi：10.1016/0014-2999(81)90473-8
更新日期：1981-01-29 00:00:00
abstract：:Previous reports have shown that (+/-)-YM796 (2,8-dimethyl-3-methylene-1-oxa-8-azaspiro[4.5]decane) exhibits M1 agonistic activity and ameliorates cognitive impairment, and that the (-)-S isomer is active in in vitro studies. We report here the characterization of the (-)-S isomer, YM796 ((-)-(S)-2,8-dimethyl-3-methyl...
journal_title：European journal of pharmacology
pub_type： 杂志文章
doi：10.1016/0014-2999(94)90425-1
更新日期：1994-11-24 00:00:00
abstract：:The mechanisms underlying myocardial dysfunction in sepsis remain poorly understood. The theoretical benefits of nitric oxide synthase (NOS) inhibition in reversing the haemodynamic changes that characterise septic shock have not been supported by clinical trials, some of which have demonstrated detrimental myocardial...
journal_title：European journal of pharmacology
pub_type： 杂志文章
doi：10.1016/s0014-2999(02)02000-9
更新日期：2002-08-09 00:00:00
abstract：:In the rat distal colon, 5-hydroxytryptamine (5-HT)-induced Cl- secretion is seen as a rise in short circuit current (Isc). We investigated the 5-HT receptor mediating 5-HT-induced Cl- secretion in the rat distal colon. Rat distal colon was prepared either by stripping away the muscularis propria with the neural gangl...
journal_title：European journal of pharmacology
pub_type： 杂志文章
doi：10.1016/0014-2999(95)00752-0
更新日期：1996-03-07 00:00:00
abstract：:We examined the influence of streptozotocin-induced diabetes on the growth of cultured rat aortic smooth muscle cells in the presence of interleukin-1 beta. Interleukin-1 beta induced a dose-dependent biphasic effect on proliferation of diabetic and control smooth muscle cells, consistent with the data on [3H]thymidin...
journal_title：European journal of pharmacology
pub_type： 杂志文章
doi：10.1016/0014-2999(96)00398-6
更新日期：1996-09-05 00:00:00
abstract：:The present experiments were designed to characterize the mechanisms involved in the corticotropin releasing factor (CRF)-induced activation of central sympatho-adrenomedullary outflow in rats. Intracerebroventricularly (i.c.v.) administered CRF and urocortin (0.5, 1.5 and 3.0 nmol/animal) effectively and dose-depende...
journal_title：European journal of pharmacology
pub_type： 杂志文章
doi：10.1016/s0014-2999(01)00987-6
更新日期：2001-05-11 00:00:00
abstract：:UTP causes IL-6 production in HaCaT keratinocytes, which is partially inhibited by PD98059, a mitogen-activated protein kinase kinase (MEK) inhibitor, suggesting that a pathway other than the extracellular signal-regulated kinase (ERK) pathway is involved in the production. In the present study, we examined the involv...
journal_title：European journal of pharmacology
pub_type： 杂志文章
doi：10.1016/j.ejphar.2007.07.058
更新日期：2007-11-14 00:00:00
abstract：:To characterise the safety, tolerability, pharmacodynamics (bronchodilatory effect) and pharmacokinetics of inhaled umeclidinium in patients with chronic obstructive pulmonary disease (COPD). The first investigation was a single dose, randomised, double-blind, placebo-controlled study (clinicaltrials.gov: NCT00515502)...
journal_title：European journal of pharmacology
pub_type： 杂志文章,随机对照试验
doi：10.1016/j.ejphar.2012.12.019
更新日期：2013-02-15 00:00:00
abstract：:The influence of the delta-opioid receptor antagonist naltrindole upon sensitization to the locomotor activating effects of cocaine was assessed. Activity in response to a challenge dose of cocaine (20 mg/kg, i.p.) was significantly increased in rats which had received cocaine (20 mg/kg, i.p.) once daily for 3 days as...
journal_title：European journal of pharmacology
pub_type： 杂志文章
doi：10.1016/0014-2999(93)90370-w
更新日期：1993-10-19 00:00:00
abstract：:As there is increasing evidence that purines are involved in cerebral vasodilatation, purine receptors were characterized pharmacologically in pial arteries from rabbit, cat and man, and compared with purine receptors in various non-cerebral vascular beds. Use of agonists and antagonists allows purine receptors to be ...
journal_title：European journal of pharmacology
pub_type： 杂志文章
doi：10.1016/0014-2999(87)90387-6
更新日期：1987-12-15 00:00:00
abstract：:Clinical use of gentamicin over prolonged periods is limited because of dose- and time-dependent nephrotoxicity. Primarily, lysosomal phospholipidosis, intracellular oxidative stress and heightened inflammation have been implicated. Hydrogen sulphide is an endogenously produced signal transduction molecule with strong...
journal_title：European journal of pharmacology
pub_type： 杂志文章
doi：10.1016/j.ejphar.2012.04.030
更新日期：2012-06-15 00:00:00
abstract：:Endothelin-1 (ET-1) is reported to be the most powerful constrictor of blood vessels known. Atrial natriuretic factor is a potent relaxor of contracted vessels. This study examined the potential interaction between these vasoactive peptides on rabbit aortic rings. ET-1 contracted the rings in a dose-dependent manner w...
journal_title：European journal of pharmacology
pub_type： 杂志文章
doi：10.1016/0014-2999(90)94168-w
更新日期：1990-12-04 00:00:00
abstract：:The response of lymph vessels, arterioles and venules in the exteriorized rat mesentery to endothelin-1, vasopressin and norepinephrine was examined with the aid of high-resolution television microscopy. On a molar basis, endothelin-1 was more potent than vasopressin to contract the three types of vessels. Norepinephr...
journal_title：European journal of pharmacology
pub_type： 杂志文章
doi：10.1016/0014-2999(89)90135-0
更新日期：1989-10-24 00:00:00
abstract：:The present study examined the effects of local subcutaneous administration of formalin on adenosine release from the rat hind paw, and the effects of inhibitors of adenosine metabolism on such release. Microdialysis probes were inserted into the subcutaneous tissue of the plantar surface of rat hind paws. Samples wer...
journal_title：European journal of pharmacology
pub_type： 杂志文章
doi：10.1016/s0014-2999(00)00742-1
更新日期：2000-11-17 00:00:00
abstract：:We investigated protein kinase C participation in the contractile response to 5-hydroxytryptamine (5-HT), and in the interaction between 5-HT and endothelin-1, in aortas from control and diabetic rats. Diabetic rats display attenuated reactivity to 5-HT (i.e., approximately 47% of control maximum). The protein kinase ...
journal_title：European journal of pharmacology
pub_type： 杂志文章
doi：10.1016/s0014-2999(96)00986-7
更新日期：1997-03-12 00:00:00
abstract：:This study investigated whether increased polyol pathway activity could contribute to alterations in nitrergic neurotransmission in anococcygeus muscles from 8-week diabetic rats. In the presence of guanethidine (10-30 microM) and clonidine (0.01-0.05 microM), relaxations obtained to nitrergic nerve stimulation (0.5-5...
journal_title：European journal of pharmacology
pub_type： 杂志文章
doi：10.1016/s0014-2999(96)00751-0
更新日期：1996-12-27 00:00:00
abstract：:The effects of the benzodiazepine receptor antagonist Ro 15-1788, an imidazobenzodiazepine derivative, were studied with respect to three pharmacological activities exerted by diazepam in rats. Two of these, release of shock-induced suppression of drinking and attenuation of non-reward-induced cessation of responding ...
journal_title：European journal of pharmacology
pub_type： 杂志文章
doi：10.1016/0014-2999(83)90398-9
更新日期：1983-03-18 00:00:00
abstract：:The effects of (-)-huperzine A ((5R,9R,11E)-5-amino-11-ethylidene-5,6,9,10-tetrahydro-7-methyl-5, 9-methanocycloocta[b]pyridin-2(1H)-one), and of the hydrochloride salt of E2020 ((R,S)-1-benzyl-4-[(5,6-dimethoxy-1-indanon)-2-yl]-methyl piperidine) and tacrine (9-amino-1,2,3,4-tetrahydroacridine), on the scopolamine-in...
journal_title：European journal of pharmacology
pub_type： 杂志文章
doi：10.1016/s0014-2999(98)00199-x
更新日期：1998-05-22 00:00:00
abstract：:Local infusions of PYY (3-100 pmol.min-1) caused a slowly developing vasoconstriction of a long duration in the cat submandibular salivary gland. The vasoconstrictor action of PYY was also present after alpha-adrenoceptor blockade and in sympathectomized animals. Local APP infusions caused only weak vasoconstriction. ...
journal_title：European journal of pharmacology
pub_type： 杂志文章
doi：10.1016/0014-2999(82)90300-4
更新日期：1982-09-10 00:00:00
abstract：:The introduction of new iron chelating drugs may ultimately improve iron-chelation therapy for patients with iron overload diseases such as thalassaemia and other disorders. In this paper, the in vivo effects of baicalin and quercetin on iron overload induced liver injury were studied on mice. It was found that when i...
journal_title：European journal of pharmacology
pub_type： 杂志文章
doi：10.1016/j.ejphar.2006.01.067
更新日期：2006-03-27 00:00:00
