Abstract：
:Subcutaneous injection of xylazine (0.1-3.0 mg/kg) produced a dose-dependent delay of small intestinal transit without affecting gastric emptying in the conscious mice. The xylazine-induced delay of small intestinal transit was antagonized by alpha 2-adrenoceptor antagonists, e.g., yohimbine, piperoxan and tolazoline. The antagonism of xylazine activity by yohimbine was dose-dependent, and the maximal antagonistic effect was seen at 1 mg/kg. Other adrenoceptor antagonists with only alpha 1-blocking activity, e.g., thymoxamine, prazosin and phenoxybenzamine at the doses studied did not reduce the depressant effect of xylazine on small intestinal transit. A beta-adrenergic antagonist, propranolol was not effective in reducing xylazine activity. The opioid antagonist, naloxone did not reduce the effective of xylazine, nor did yohimbine antagonize the morphine-induced delay of small intestinal transit. The xylazine-induced delay of small intestinal transit was not altered by atropine, hexamethonium, haloperidol, methysergide, chlorpheniramine or cimetidine. Pretreatment of mice with reserpine and alpha-methyl-p-tyrosine or 6-hydroxydopamine failed to reduce the intestinal effect of xylazine. These results suggest that xylazine-induced delay of small intestinal transit is mediated by postjunctional alpha 2-adrenoceptors and appears not to involve activation of opioid, cholinergic, dopaminergic, histaminergic, or serotonergic receptors.
journal_name
Eur J Pharmacoljournal_title
European journal of pharmacologyauthors
Hsu WHdoi
10.1016/0014-2999(82)90285-0subject
Has Abstractpub_date
1982-09-10 00:00:00pages
55-60issue
1-2eissn
0014-2999issn
1879-0712pii
0014-2999(82)90285-0journal_volume
83pub_type
杂志文章abstract：:The contractile response of vascular smooth muscle is known to consist of fast and slow components of contraction. We investigated the effect of norepinephrine and angiotensin-II on these functional properties of vascular smooth muscle in a quantitative fashion by analyzing the velocity of isometric tension developmen...
journal_title：European journal of pharmacology
pub_type： 杂志文章
doi：10.1016/0014-2999(80)90274-5
更新日期：1980-03-21 00:00:00
abstract：:The inhibitory effects of the new bradykinin antagonist HOE 140 (D-Arg-Arg-Pro-Hyp-Gly-Thi-Ser-D-Tic-Oic-Arg) on depressor responses to exogenous bradykinin were investigated in conscious rats and compared with those of the bradykinin antagonist B4146 (D-Arg-Hyp-Pro-Gly-Thi-Ser-D-Pro-Thi-Arg). HOE 140 showed a 250-700...
journal_title：European journal of pharmacology
pub_type： 杂志文章
doi：10.1016/0014-2999(91)90684-i
更新日期：1991-07-23 00:00:00
abstract：:In the mouse tail-flick test, neither the racemate of N-allylnormetazocine (NANM) nor its optical isomers showed antinociceptive activity. However, all three antagonized morphine's tail-flick effects. In the phenylquinone test in mice, the racemate and (-)-isomer of NANM showed agonist activity and antagonized morphin...
journal_title：European journal of pharmacology
pub_type： 杂志文章
doi：10.1016/0014-2999(83)90476-4
更新日期：1983-07-22 00:00:00
abstract：:In Ca-free solution norepinephrine (NE) produced only a phasic contraction in the media-intima layer of rabbit aorta. The second application of NE was almost ineffective. Incubation of the muscle with Ca for a short period (Ca loading) restored the ability to produce a phasic contraction in Ca-free solution. Various i...
journal_title：European journal of pharmacology
pub_type： 杂志文章
doi：10.1016/0014-2999(79)90176-6
更新日期：1979-06-15 00:00:00
abstract：:Berberine, which is a major constituent of the rhizome of Coptidis japonica (CJ), inhibits IL-8 production in colonic epithelial cells and improves 2,4,6-trinitrobenzene sulfonic acid (TNBS)-induced colitis in mice. In our preliminary studies, berberine inhibited lipid peroxidation in liposomes prepared from l-α-phosp...
journal_title：European journal of pharmacology
pub_type： 杂志文章
doi：10.1016/j.ejphar.2010.08.046
更新日期：2010-12-01 00:00:00
abstract：:Our goal was to determine if venlafaxine has a negative effect on bone metabolism. Rats were divided into three groups. The sham-operated control group (SHAM), the control group after orchidectomy (ORX), and the experimental group after orchidectomy received venlafaxine (VEN ORX) in standard laboratory diet (SLD) for ...
journal_title：European journal of pharmacology
pub_type： 杂志文章
doi：10.1016/j.ejphar.2015.04.029
更新日期：2015-08-15 00:00:00
abstract：:Nitric oxide (NO) and prostacyclin (PGI(2)) are two of the most important vasodilators produced by endothelial cells, the regulation of NO on PGI(2) production has not been fully clear yet. Polyaspartoyl.L-arginine (PDR) is an L-arginine residue-rich compound with inhibitory effects of platelet aggregation and thrombo...
journal_title：European journal of pharmacology
pub_type： 杂志文章
doi：10.1016/j.ejphar.2008.11.003
更新日期：2008-12-28 00:00:00
abstract：:Insulin resistance is a major pathophysiological feature in the development of type 2 diabetes. The liver is an important organ responsible for the development of insulin resistance, and exploring liver glucose metabolism is important to study insulin resistance. We first established the model of insulin resistance in...
journal_title：European journal of pharmacology
pub_type： 杂志文章
doi：10.1016/j.ejphar.2018.11.024
更新日期：2019-01-15 00:00:00
abstract：:Acute kidney injury (AKI) is defined as a rapid loss of kidney function characterised by inflammation and cell death, ultimately leading to further functional and structural renal alterations. Based on experimental and epidemiological pieces of evidence, AKI may progress to chronic kidney disease (CKD) even after a re...
journal_title：European journal of pharmacology
pub_type： 杂志文章,评审
doi：10.1016/j.ejphar.2019.172711
更新日期：2019-12-15 00:00:00
abstract：:Immunopharmacology is one of the most dynamic areas in pharmacology encompassing classical immunosuppressive drugs which reveal completely new clues concerning their mode of action as well as novel molecular biology approaches for treating inflammatory and autoimmune diseases, infections and cancer. This article focus...
journal_title：European journal of pharmacology
pub_type： 杂志文章,评审
doi：10.1016/s0014-2999(99)00361-1
更新日期：1999-06-30 00:00:00
abstract：:This study investigated a potential interaction between MK-801 and morphine tolerance using electroencephalography (EEG), EEG spectral parameters and behavior in the rat. Rats were treated for 7 days with morphine alone or with morphine and MK-801. Control groups received chronic MK-801 alone or saline. On day 8 all r...
journal_title：European journal of pharmacology
pub_type： 杂志文章
doi：10.1016/0014-2999(94)90293-3
更新日期：1994-08-11 00:00:00
abstract：:The effects of the alpha 2-adrenoceptor antagonist idazoxan on 5-hydroxytryptamine (5-HT) neuronal firing and release have been investigated. Idazoxan, administered i.v. (10 micrograms/kg and 0.5 mg/kg) increased dorsal raphe nucleus (DRN)-5-HT neuronal firing rate in a dose-dependent fashion. At the higher dose, a vo...
journal_title：European journal of pharmacology
pub_type： 杂志文章
doi：10.1016/0014-2999(91)90204-4
更新日期：1991-01-25 00:00:00
abstract：:The responses of spinothalamic, spinoreticular, and unidentified spinal neurons to intracardiac administration of phenylbiguanide, a 5-HT3 receptor agonist, were examined in anesthetized cats and monkeys. Eighteen neurons were excited, 5 were inhibited, and 12 were unresponsive to this stimulus. Results suggest that c...
journal_title：European journal of pharmacology
pub_type： 杂志文章
doi：10.1016/0014-2999(92)90218-s
更新日期：1992-05-27 00:00:00
abstract：:HgCl2 and mersalyl increased and later decreased both the spontaneous and evoked transmitter liberation at the frog neuromuscular junction. Lower concentration of HgCl2 exhibited only an inhibitory effect on transmitter release. These mercurials inhibited calcium transport of mitochondria and synaptosomal vesicles. Lo...
journal_title：European journal of pharmacology
pub_type： 杂志文章
doi：10.1016/0014-2999(78)90438-7
更新日期：1978-10-15 00:00:00
abstract：:The effects of caffeine (10 mM) on depolarization-activated, calcium-independent outward K+ currents were investigated in isolated rat ventricular myocytes, using whole-cell clamping. The external solution contained CoCl2 2 mM and the internal solution contained ethylene glycol-bis(-aminoethyl ether) N,N,N',N'-tetraac...
journal_title：European journal of pharmacology
pub_type： 杂志文章
doi：10.1016/0014-2999(92)90551-e
更新日期：1992-12-15 00:00:00
abstract：:The cold-stimulated thyrotropin (TSH) secretion in male rats was suppressed by muscarinic agonists, i.e. Oxa-22, McN-A-343 (an M1 agonist), oxotremorine (an M2 agonist) and methacholine (a quaternary compound). The inhibitory effect of Oxa-22 was antagonized by atropine, butylscopolamine and glycopyrrolate as well as ...
journal_title：European journal of pharmacology
pub_type： 杂志文章
doi：10.1016/0014-2999(88)90374-3
更新日期：1988-11-22 00:00:00
abstract：:The electrophysiological effects of the putative P2-purinoceptor antagonist reactive blue 2 (RB2) were investigated in strips of circular muscle of rat caecum with the sucrose gap technique. RB2 (0.1-1 mM) antagonized in a concentration-dependent manner, the amplitude, rate of rise and speed of onset of the inhibitory...
journal_title：European journal of pharmacology
pub_type： 杂志文章
doi：10.1016/0014-2999(86)90364-x
更新日期：1986-08-15 00:00:00
abstract：:We have analyzed the effect of quinolizidine alkaloids from Lupinus species upon insulin secretion. Isolated normal rat islets were incubated with 3.3, 8.3, and 16.7 mM glucose, in the presence or absence of different concentrations of lupanine (0.05, 0.5, and 1.0 mM), 13-alpha-OH lupanine, 17-oxo-lupanine, and 2-thio...
journal_title：European journal of pharmacology
pub_type： 杂志文章
doi：10.1016/j.ejphar.2004.09.008
更新日期：2004-11-03 00:00:00
abstract：:The pharmacological activity of bupropion was compared between α7 nicotinic acetylcholine receptors expressed in heterologous cells and hippocampal and dorsal raphe nucleus neurons. The inhibitory activity of bupropion was studied on GH3-α7 cells by Ca2+ influx, as well as on neurons from the dorsal raphe nucleus and ...
journal_title：European journal of pharmacology
pub_type： 杂志文章
doi：10.1016/j.ejphar.2014.06.059
更新日期：2014-10-05 00:00:00
abstract：:With some latency, ouabain (10(-6)--10(-5) M) induced a long-lasting contractile response of the isolated vas deferens of the guinea-pig. The ouabain-induced contraction was potentiated by pretreatment with tropolone, whereas it was prevented by pretreatment with cocaine, bretylium, reserpine or phentolamine. The resp...
journal_title：European journal of pharmacology
pub_type： 杂志文章
doi：10.1016/0014-2999(78)90121-8
更新日期：1978-02-15 00:00:00
abstract：:GABAA receptors are pentameric chloride ion channels that are opened by GABA. We have screened a cell line derived from human glioblastoma, U3047MG, for expression of GABAA receptor subunit isoforms and formation of functional ion channels. We identified GABAA receptors subunit α2, α3, α5, β1, β2, β3, δ, γ3, π, and θ ...
journal_title：European journal of pharmacology
pub_type： 杂志文章
doi：10.1016/j.ejphar.2014.12.001
更新日期：2015-02-05 00:00:00
abstract：:Venenum Bufonis, a traditional Chinese medicine, is widely used in the treatment of liver cancer in modern Chinese medical practices. In our search for anti-hepatoma constituents in Venenum Bufonis, bufotalin, bufalin, telocinobufagin and cinobufagin were obtained. Bufotalin was the most potent active compound among t...
journal_title：European journal of pharmacology
pub_type： 杂志文章
doi：10.1016/j.ejphar.2012.06.045
更新日期：2012-10-05 00:00:00
abstract：:It has been suggested that administration of a cannabinoid CB(1) (SR141716A ¿N-(piperidin-1-yl)-5-(4-chlorophenyl)-1-(2, 4-dichlorophenyl)-4-methyl-1-H-pyrazole-3-carboxamide) and CB(2) (SR144528 ¿N-[(1S)-endo-1, 3, 3-trimethyl bicyclo ¿2.2.1 heptan-2-yl]-5-(4-chloro-3-methylphenyl)-1-(4-methylbenzyl)-pyr azo le- 3-ca...
journal_title：European journal of pharmacology
pub_type： 杂志文章
doi：10.1016/s0014-2999(00)00226-0
更新日期：2000-05-19 00:00:00
abstract：:The effect of local administration of big endothelin-1 (1-38, big ET-1) has been investigated on blood flow in the skin of anaesthetised rats, measured by 133Xe clearance. The local effects of big ET-1 and big endothelin-3 (1-41, big ET-3) have also been determined on microvessel diameter by intravital microscopy of t...
journal_title：European journal of pharmacology
pub_type： 杂志文章
doi：10.1016/0014-2999(93)90056-n
更新日期：1993-03-23 00:00:00
abstract：:We found that pergolide, a dopamine D1/D2 receptor agonist used in the clinical therapy of Parkinson's disease, protects SH-SY5Y neuroblastoma cells from cell death induced by a brief pulse (15 min) of 1 mM H(2)O(2). Neuroprotection was found when pergolide was added to the culture medium either simultaneously with (E...
journal_title：European journal of pharmacology
pub_type： 杂志文章
doi：10.1016/s0014-2999(01)01537-0
更新日期：2002-01-02 00:00:00
abstract：:Low levels of serotonin may reduce the density of the serotonin transporter (SERT) by either increasing trafficking or reducing synthesis; a "neuroadaptive response". To determine whether 3,4-methylenedioxymethamphetamine (MDMA)-induced reductions in SERT density could be related to such a mechanism, p-chlorophenylala...
journal_title：European journal of pharmacology
pub_type： 杂志文章,收录出版
doi：10.1016/s0014-2999(02)02420-2
更新日期：2002-10-25 00:00:00
abstract：:Substance-related and addictive disorders (SRADs) are characterized by compulsive drug use and recurrent relapse. The persistence of pathological drug-related memories indisputably contributes to a high propensity to relapse. Hence, strategies to disrupt reconsolidation of drug reward memory are currently being pursue...
journal_title：European journal of pharmacology
pub_type： 杂志文章
doi：10.1016/j.ejphar.2021.173911
更新日期：2021-01-24 00:00:00
abstract：:It is well documented that cannabinoid receptor agonist WIN 55,212-2 had protective effect against cerebral ischemic injury. Our previous study indicated that WIN 55,212-2 pretreatment induced ischemic tolerance to focal cerebral ischemia in a dose-dependent manner. The aim of the present study was to investigate the ...
journal_title：European journal of pharmacology
pub_type： 杂志文章
doi：10.1016/j.ejphar.2010.07.024
更新日期：2010-10-25 00:00:00
abstract：:The effects of menatetrenone, a vitamin K2 homologue, on osteoclast-like cell formation in mouse bone marrow culture were investigated. After 7 days of incubation, menatetrenone at 10(-6) M, 3 x 10(-6) M and 10(-5) M dose dependently inhibited the tartrate-resistant acid phosphatase-positive multinucleated cell format...
journal_title：European journal of pharmacology
pub_type： 杂志文章
doi：10.1016/0014-2999(94)90539-8
更新日期：1994-09-22 00:00:00
abstract：:The effect of regression of left ventricular hypertrophy was studied in deoxycorticosterone-acetate-salt hypertensive rats (DOCA-salt hypertensive rats) treated with tetrandrine. Treatment with tetrandrine (by gastric intubation, 50 mg/kg per day for 9 weeks) lowered systolic blood pressure, left ventricular weight, C...
journal_title：European journal of pharmacology
pub_type： 杂志文章
doi：10.1016/0014-2999(95)00055-p
更新日期：1995-05-04 00:00:00
