Abstract:
BACKGROUND AND PURPOSE:Oxaliplatin is a platinum-based chemotherapeutic drug used as a first-line therapy for colorectal cancer. However, its use is associated with severe gastrointestinal side-effects resulting in dose limitations and/or cessation of treatment. In this study, we tested whether oxidative stress, caused by chronic oxaliplatin treatment, induces enteric neuronal damage and colonic dysmotility. EXPERIMENTAL APPROACH:Oxaliplatin (3 mg·kg-1 per day) was administered in vivo to Balb/c mice intraperitoneally three times a week. The distal colon was collected at day 14 of treatment. Immunohistochemistry was performed in wholemount preparations of submucosal and myenteric ganglia. Neuromuscular transmission was studied by intracellular electrophysiology. Circular muscle tone was studied by force transducers. Colon propulsive activity studied in organ bath experiments and faeces were collected to measure water content. KEY RESULTS:Chronic in vivo oxaliplatin treatment resulted in increased formation of reactive oxygen species (O2 -), nitration of proteins, mitochondrial membrane depolarisation resulting in the release of cytochrome c, loss of neurons, increased inducible NOS expression and apoptosis in both the submucosal and myenteric plexuses of the colon. Oxaliplatin treatment enhanced NO-mediated inhibitory junction potentials and altered the response of circular muscles to the NO donor, sodium nitroprusside. It also reduced the frequency of colonic migrating motor complexes and decreased circular muscle tone, effects reversed by the NO synthase inhibitor, Nω-Nitro-L-arginine. CONCLUSION AND IMPLICATIONS:Our study is the first to provide evidence that oxidative stress is a key player in enteric neuropathy and colonic dysmotility leading to symptoms of chronic constipation observed in oxaliplatin-treated mice.
journal_name
Br J Pharmacoljournal_title
British journal of pharmacologyauthors
McQuade RM,Carbone SE,Stojanovska V,Rahman A,Gwynne RM,Robinson AM,Goodman CA,Bornstein JC,Nurgali Kdoi
10.1111/bph.13646subject
Has Abstractpub_date
2016-12-01 00:00:00pages
3502-3521issue
24eissn
0007-1188issn
1476-5381journal_volume
173pub_type
杂志文章abstract::Photorelaxation of vascular smooth muscle (VSM) is caused by the release of nitric oxide (NO) from a finite molecular store that can be depleted by irradiating pre-contracted arteries with visible light. The ability of an 'exhausted' vessel to respond to a further period of illumination is lost temporarily but then re...
journal_title:British journal of pharmacology
pub_type: 杂志文章
doi:10.1038/sj.bjp.0703499
更新日期:2000-08-01 00:00:00
abstract:BACKGROUND AND PURPOSE:Diabetes mellitus is associated with a specific cardiomyopathy. We compared the cardioprotective effects of an endothelin-A receptor blocker (ET(A)-RB) with those of an angiotensin-converting enzyme inhibitor (ACE-I) in rats with streptozotocin (STZ)-induced diabetes. EXPERIMENTAL APPROACH:Diabe...
journal_title:British journal of pharmacology
pub_type: 杂志文章
doi:10.1038/sj.bjp.0707325
更新日期:2007-08-01 00:00:00
abstract:BACKGROUND AND PURPOSE:There is increasing evidence that not only the monoaminergic but also the glutamatergic system is involved in the pathophysiology of attention-deficit hyperactivity disorder (ADHD). Hyperactivity of glutamate metabolism might be causally related to a hypoactive state in the dopaminergic system. A...
journal_title:British journal of pharmacology
pub_type: 杂志文章
doi:10.1111/j.1476-5381.2010.00707.x
更新日期:2010-05-01 00:00:00
abstract::1. [125I]-Tyr4-bombesin exhibited saturable binding to pancreatic acinar cells. 2. Preincubation of cells at 37 degrees C with 0.03 nM-1 microM-bombesin for 10 min followed by acid or neutral washes reduced subsequent binding of [125I]-Tyr4-bombesin in a concentration-dependent manner by up to 90%. 3. In cell suspensi...
journal_title:British journal of pharmacology
pub_type: 杂志文章
doi:10.1111/j.1476-5381.1994.tb13187.x
更新日期:1994-08-01 00:00:00
abstract::1. The effects of the intravenous injection of Kö 1173, a new anticonvulsant drug, phenytoin and procainamide were studied on three types of cardiac arrhythmia in dogs.2. Ventricular ectopic beats produced by intravenous injection of adrenaline in anaesthetized dogs respired with halothane were abolished by Kö 1173, 0...
journal_title:British journal of pharmacology
pub_type: 杂志文章
doi:10.1111/j.1476-5381.1972.tb08114.x
更新日期:1972-08-01 00:00:00
abstract::1 In cats anaesthetized with pentobarbitone, saxitoxin and, on a few occasions, tetrodotoxin were injected into a lateral cerebral ventricle or into the subarachnoid space of the lower brain stem. Observations were made on frequency and tidal volume of breathing, on CO(2) responsiveness and on electrical responsivenes...
journal_title:British journal of pharmacology
pub_type: 杂志文章
doi:10.1111/j.1476-5381.1977.tb07561.x
更新日期:1977-12-01 00:00:00
abstract::1. To investigate the role of nitric oxide in epilepsy we have studied the effects of agents which affect nitric oxide synthesis in sound-induced seizures in DBA/2 mice and in genetically epilepsy-prone (GEP) rats. 2. The neuronal selective nitric oxide synthase inhibitor, 7-nitroindazole (7-NI) is anticonvulsant in t...
journal_title:British journal of pharmacology
pub_type: 杂志文章
doi:10.1111/j.1476-5381.1996.tb15690.x
更新日期:1996-09-01 00:00:00
abstract::Dopamine D2-receptors were solubilized from synaptosomal membranes of the bovine caudate nucleus using different detergents. They were labelled with [3H]-spiperone and assayed by polyethylene glycol precipitation. CHAPS was found to be the best solubilizing agent among all detergents used. Optimal conditions for solub...
journal_title:British journal of pharmacology
pub_type: 杂志文章
doi:10.1111/j.1476-5381.1984.tb16222.x
更新日期:1984-11-01 00:00:00
abstract::1 The influence of the epithelium on contractions produced by the peptidoleukotrienes, 5-hydroxytryptamine (5-HT) and the thromboxane mimetic, U-44069, was examined in trachea from control and ovalbumin-sensitized guinea-pigs. 2 In control tissues removal of the epithelium produced an approximately 2 to 4 fold leftwar...
journal_title:British journal of pharmacology
pub_type: 杂志文章
doi:10.1111/j.1476-5381.1987.tb11334.x
更新日期:1987-10-01 00:00:00
abstract::In circular smooth muscle cells of the guinea-pig stomach (antrum), diltiazem (10(-6)-10(-5)M) blocked the overshooting spike potential generated either spontaneously or by electrical stimulation in the presence of 2 mM tetraethylammonium chloride, but did not block the slow wave and the abortive spike potential. The ...
journal_title:British journal of pharmacology
pub_type: 杂志文章
doi:10.1111/j.1476-5381.1985.tb11100.x
更新日期:1985-12-01 00:00:00
abstract:BACKGROUND AND PURPOSE:Nociceptin/orphanin FQ (N/OFQ) peptide (NOP) receptor agonists display a promising analgesic profile in preclinical studies. However, supraspinal N/OFQ produced hyperalgesia in rodents and such effects have not been addressed in primates. Thus, the aim of this study was to investigate the effects...
journal_title:British journal of pharmacology
pub_type: 杂志文章
doi:10.1111/bph.13124
更新日期:2015-07-01 00:00:00
abstract::1. The effects of ryanodine on changes in cytoplasmic Ca2+ level ([Ca2+]i) and muscle tension induced by maximum concentrations of phenylephrine (Phe; 1 microM), prostaglandin F2 alpha (PGF2 alpha, 10 microM), caffeine (Caf, 30 mM) and isoprenaline (Iso, 1 microM) were examined in rat aortic strips using fura-2. 2. In...
journal_title:British journal of pharmacology
pub_type: 杂志文章
doi:10.1111/j.1476-5381.1990.tb14075.x
更新日期:1990-08-01 00:00:00
abstract::The cardiovascular actions of cannbinoids are complex. In general they cause vasorelaxation in isolated blood vessels, while in anaesthetised animals they cause multiphasic responses which involve an early bradycardia and long-lasting hypotension. However, in conscious animals, the picture is one of bradycardia follow...
journal_title:British journal of pharmacology
pub_type: 杂志文章,评审
doi:10.1038/sj.bjp.0705725
更新日期:2004-05-01 00:00:00
abstract::1. The effect of a standardized mixture of beta-hydroxyethyl rutosides against oxidative damage in singlet oxygen-challenged isolated cardiac myocytes from adult rats was investigated. The morphology of the myocytes was evaluated as an indicator for cell viability (elongated, rod shaped cells vs. hypercontracted, roun...
journal_title:British journal of pharmacology
pub_type: 杂志文章
doi:10.1111/j.1476-5381.1996.tb15725.x
更新日期:1996-10-01 00:00:00
abstract::1. Measurements were made of the uptake, metabolism and release of [(3)H]-adrenaline by human platelets in citrated plasma or in an artificial medium.2. Radioactive adrenaline was not taken up at 0-2 degrees C. At 37 degrees C there was a slow uptake which continued for at least 5 hours.3. About half of the radioactiv...
journal_title:British journal of pharmacology
pub_type: 杂志文章
doi:10.1111/j.1476-5381.1970.tb09903.x
更新日期:1970-08-01 00:00:00
abstract::1. The effects of some drugs known to inhibit transmission in the superior cervical ganglion and at the neuromuscular junction were investigated on the cholinergic nerve-smooth muscle junction, using the rat isolated innervated urinary bladder preparation.2. HC-3 and Win 4981 inhibited the indirectly evoked contractio...
journal_title:British journal of pharmacology
pub_type: 杂志文章
doi:10.1111/j.1476-5381.1970.tb09900.x
更新日期:1970-08-01 00:00:00
abstract::1. We previously showed that chronic exposure to aspirin (100 mg kg-1 daily, by mouth) is effective in preventing the onset of hypertension in young (28-84 day old) spontaneously hypertensive rats (SHRs). This is contrary to what others have reported using older SHRs. 2. Renal prostaglandin F2 alpha was also reduced i...
journal_title:British journal of pharmacology
pub_type: 杂志文章
doi:10.1111/j.1476-5381.1988.tb11585.x
更新日期:1988-07-01 00:00:00
abstract:BACKGROUND AND PURPOSE:N-type voltage-gated calcium (Cav 2.2) channels are critical determinants of increased neuronal excitability and neurotransmission accompanying persistent neuropathic pain. Although Cav 2.2 channel antagonists are recommended as first-line treatment for neuropathic pain, calcium-current blocking ...
journal_title:British journal of pharmacology
pub_type: 杂志文章
doi:10.1111/bph.13737
更新日期:2018-06-01 00:00:00
abstract:BACKGROUND AND PURPOSE:In cardiac myocytes, cAMP produced by both β1 and β2 -adrenergic receptors (ARs) results in an increase in L-type Ca2+ channel activity and myocyte contraction. However, only cAMP produced by β1 ARs is able to enhance myocyte relaxation through phospholamban-dependent regulation of the sarco/endo...
journal_title:British journal of pharmacology
pub_type: 杂志文章
doi:10.1111/bph.15382
更新日期:2021-01-21 00:00:00
abstract:BACKGROUND AND PURPOSE:The function of transporters in peripheral blood mononuclear cells (PBMC) has been characterized, but less is known about cytochrome P450 (CYP) enzyme function in these cells. Given that cytokines are dysregulated in many diseases, the purpose of this work was to assess the impact of cytokines on...
journal_title:British journal of pharmacology
pub_type: 杂志文章
doi:10.1111/j.1476-5381.2008.00050.x
更新日期:2009-02-01 00:00:00
abstract::1. A technique for the close-arterial administration of substances to the rat stomach in vivo has been developed. 2. Intra-arterial infusion of platelet-activating factor (Paf, 10-50 ng kg-1 min-1 for 10 min) induced macroscopically assessed damage in the corpus mucosa, characterized as vasocongestion and necrosis. 3....
journal_title:British journal of pharmacology
pub_type: 杂志文章
doi:10.1111/j.1476-5381.1988.tb11425.x
更新日期:1988-01-01 00:00:00
abstract::1. The mechanism of stimulation of cyclic adenosine 3',5'-monophosphate (cyclic AMP) accumulation by adrenaline and ouabain and the effect of Mn(++) substitution for Mg(++) as the metal ion requirement of this system was studied in cell-free preparations of adenyl cyclase from rat brain.2. In the rat cerebral cortex p...
journal_title:British journal of pharmacology
pub_type: 杂志文章
doi:10.1111/j.1476-5381.1973.tb08358.x
更新日期:1973-07-01 00:00:00
abstract::1. The possible roles of endothelial and smooth muscle cell hyperpolarization and nitric oxide (NO) in endothelium-dependent relaxation were examined in isolated rings of pig right coronary artery. 2. The effects of hyperpolarization were prevented with high K+ (30-125 mM), isotonic Krebs solutions. Functional antagon...
journal_title:British journal of pharmacology
pub_type: 杂志文章
doi:10.1111/j.1476-5381.1994.tb13110.x
更新日期:1994-06-01 00:00:00
abstract:BACKGROUND AND PURPOSE:Inflammation associated with the tumour microenvironment (TME) plays a critical role in the cancer development, and immunotherapeutic strategies that aim to modulate the immune response in cancer have been crucial. In this study, a Methotrexate-loaded (MTX) poly (lactic-co-glycolic acid)-based (P...
journal_title:British journal of pharmacology
pub_type: 杂志文章
doi:10.1111/bph.15373
更新日期:2021-01-12 00:00:00
abstract::The iodine-containing contrast medium iopanoic acid induces alterations of thyroid hormone metabolism comparable to those observed with the iodine-containing antiarrhythmic drug amiodarone. Both compounds inhibit the intracellular conversion of thyroxine (T4) to triiodothyronine (T3). Using iopanoic acid, the question...
journal_title:British journal of pharmacology
pub_type: 杂志文章
doi:10.1111/j.1476-5381.1986.tb10217.x
更新日期:1986-06-01 00:00:00
abstract::1 A series of cationic, lipophilic histamine H1-receptor antagonists, neuroleptics, antidepressants and monoamine oxidase inhibitors were tested for their effects on anti-IgE-induced histamine release from human lung fragments in vitro. 2 They had a biphasic effect: at low concentrations a dose-related inhibition of h...
journal_title:British journal of pharmacology
pub_type: 杂志文章
doi:10.1111/j.1476-5381.1980.tb07919.x
更新日期:1980-08-01 00:00:00
abstract::1. Inhibition of rat platelet aggregation by the nitric oxide (NO) donor MAHMA NONOate (Z-1-N-methyl-N-[6-(N-methylammoniohexyl)amino]diazen-1-ium-1,2-diolate) was investigated. The aims were to compare its anti-aggregatory effect with vasorelaxation, to determine the effects of the soluble guanylate cyclase inhibitor...
journal_title:British journal of pharmacology
pub_type: 杂志文章
doi:10.1038/sj.bjp.0704971
更新日期:2002-12-01 00:00:00
abstract::1. Bradykinin (BK) instilled directly into the airway lumen caused bronchoconstriction in anaesthetized, mechanically ventilated guinea-pigs in the presence of propranolol (1 mg kg-1 i.v.). The geometric mean dose of BK required to produce 100% increase in airway opening pressure (PD100) was 22.9 nmol (95% c.i. 11.7-4...
journal_title:British journal of pharmacology
pub_type: 杂志文章
doi:10.1111/j.1476-5381.1990.tb12092.x
更新日期:1990-09-01 00:00:00
abstract:BACKGROUND AND PURPOSE:Azithromycin has been reported to modify activation of macrophages towards the M2 phenotype. Here, we have sought to identify the mechanisms underlying this modulatory effect of azithromycin on human monocytes, classically activated in vitro. EXPERIMENTAL APPROACH:Human blood monocytes were prim...
journal_title:British journal of pharmacology
pub_type: 杂志文章
doi:10.1111/j.1476-5381.2011.01576.x
更新日期:2012-03-01 00:00:00
abstract::1. The endothelium-dependent relaxants acetylcholine (ACh; 0.03-10 microM) and A23187 (0.03-10 microM), and nitric oxide (NO), applied either as authentic NO (0.01-10 microM) or as the NO donors 3-morpholino-sydnonimine (SIN-1; 0.1-10 microM) and S-nitroso-N-acetylpenicillamine (SNAP; 0.1-10 microM), each evoked conce...
journal_title:British journal of pharmacology
pub_type: 杂志文章
doi:10.1038/sj.bjp.0701746
更新日期:1998-04-01 00:00:00