Abstract：
BACKGROUND:Xanthine oxidase (XO) is one of the two interconvertible forms of xanthine oxidoreductase and well-studied for its role in purine catabolism and that of other purine analogues, drugs especially. Our study investigated the incidence of polymorphism in phenotypes along with the influence of gender and age on enzyme activity in a Nigerian population. METHODS:Caffeine (110 mg) was administered to each of 129 healthy, unrelated subjects who were nonsmokers. Urine voided within 7 h after dosing was collected for a high-performance liquid chromatographic analysis of metabolites, and the urinary molar ratio of metabolites was used as marker for enzyme activity. Statistical analysis of data was carried out to identify the prevalent phenotypes and also assessed the influence of age and sex on enzyme activity. RESULT:A sevenfold variation in XO activity with a population mean (± SD) molar ratio of 0.43 ± 0.15 and median (interquartile range) of 0.42 (0.16) was observed. Distinctly higher enzyme activity was also recorded in 8% of the study population, and there was no correlation (P > 0.05) between enzyme activity and the studied covariates. CONCLUSIONS:Our study confirmed the existence of polymorphism in xanthine oxidase activity in Nigerians and also the incidence of individuals with distinctly higher XO activity in the population.
journal_name
Eur J Clin Pharmacoljournal_title
European journal of clinical pharmacologyauthors
Adehin A,Bolaji OOdoi
10.1007/s00228-015-1852-9subject
Has Abstractpub_date
2015-06-01 00:00:00pages
687-690issue
6eissn
0031-6970issn
1432-1041pii
10.1007/s00228-015-1852-9journal_volume
71pub_type
杂志文章abstract：:The pharmacokinetics of lignocaine has been compared after epidural anaesthesia in diabetics and non-diabetic patients. Epidural lignocaine 8 mg.kg-1 was given to 8 well controlled Type II diabetic and 8 non-diabetic patients and the plasma drug concentration in serial blood samples were measured by HPLC. The plasma l...
journal_title：European journal of clinical pharmacology
pub_type： 杂志文章
doi：10.1007/BF02333021
更新日期：1992-01-01 00:00:00
abstract：OBJECTIVE:The pharmacokinetics and bioavailability of artemether and dihydroartemisinin were investigated in eight Thai males following the administration of single oral and intramuscular doses of artemether (300 mg) in a randomized two-way cross-over study. RESULTS:Both oral and intramuscular artemether were well-tol...
journal_title：European journal of clinical pharmacology
pub_type： 临床试验,杂志文章,随机对照试验
doi：10.1007/s002280050295
更新日期：1997-01-01 00:00:00
abstract：:A questionnaire survey was carried out to explore differences in the approach to treatment of patients with Type II diabetes between physicians in Northern Ireland, Norway and Sweden, and to discover to what extent it could account for the three-fold difference in drug use between the countries. A representative sampl...
journal_title：European journal of clinical pharmacology
pub_type： 杂志文章
doi：10.1007/BF00542408
更新日期：1986-01-01 00:00:00
abstract：:The antihypertensive effect of labetalol (L) was compared with that of clonidine (C) in a randomized cross-over study in 17 hypertensive outpatients on bendrofluazide (B). After treatment for two weeks with B(5 mg qd), either L (100 mg tid) or C (0.1 mg tid) was given and their doses were titrated at 2-weekly visits u...
journal_title：European journal of clinical pharmacology
pub_type： 临床试验,杂志文章,随机对照试验
doi：10.1007/BF00542319
更新日期：1982-01-01 00:00:00
abstract：PURPOSE:Persistence to statins is low, in part due to lack of perception of cardiovascular (CV) risk. High values of low-density lipoprotein cholesterol (LDL-C) might increase the motivation for patients to be persistent. We investigated whether the baseline LDL-C value influences the discontinuation of statin treatmen...
journal_title：European journal of clinical pharmacology
pub_type： 杂志文章
doi：10.1007/s00228-015-1996-7
更新日期：2016-03-01 00:00:00
abstract：:Fifteen mild to moderate hypertensives were submitted to exercise testing using a bicycle ergometer with a fixed load. Heart rate, blood pressure and ECG were recorded throughout 5 min exercise and 10 min recovery. Oxygen uptake was measured during the final minute of exercise and blood glucose estimation and serum dr...
journal_title：European journal of clinical pharmacology
pub_type： 临床试验,杂志文章
doi：10.1007/BF00542508
更新日期：1983-01-01 00:00:00
abstract：:Since 1988, the German Embryotox institute combines individual counselling of pregnant women and their health care providers (HCP) with research on drug safety in pregnancy. In addition, Embryotox offers web-based information which covers the most important and most frequently requested pharmaceutical substances. In c...
journal_title：European journal of clinical pharmacology
pub_type： 杂志文章
doi：10.1007/s00228-017-2351-y
更新日期：2018-02-01 00:00:00
abstract：OBJECTIVE:Spontaneous reporting is the most common method used in pharmacovigilance and the best one to generate signals on new or rare adverse drug reactions (ADRs). Under-reporting is a major drawback of this system. The objective of this study was to quantify the extent of under-reporting in general practice and to ...
journal_title：European journal of clinical pharmacology
pub_type： 杂志文章
doi：10.1007/s002280050498
更新日期：1998-08-01 00:00:00
abstract：OBJECTIVE:As quinine is mainly metabolised by human liver CYP3A4 and grapefruit juice inhibits CYP3A4, the effect of grapefruit juice on the pharmacokinetics of quinine following a single oral dose of 600 mg quinine sulphate was investigated. METHODS:The study was carried out in ten healthy volunteers using a randomis...
journal_title：European journal of clinical pharmacology
pub_type： 临床试验,杂志文章,随机对照试验
doi：10.1007/s002280050646
更新日期：1999-07-01 00:00:00
abstract：:The pharmacokinetics of a single 2 mg IV dose of chlordesmethyldiazepam has been studied in 11 patients with renal failure on regular haemodialysis and in 11 age-matched healthy controls. The kinetics was also examined after a single 2 mg oral dose in 6 of the 11 renal failure patients. After intravenous administratio...
journal_title：European journal of clinical pharmacology
pub_type： 杂志文章
doi：10.1007/BF00280109
更新日期：1991-01-01 00:00:00
abstract：OBJECTIVE:To assess the haemodynamic effects of short-term treatment with dofetilide in comparison with sotalol in patients with ischaemic heart disease. METHODS:Twelve patients with ischaemic heart disease and sustained ventricular tachycardia were treated with dofetilide [500 microg twice daily (b.i.d.)] or sotalol ...
journal_title：European journal of clinical pharmacology
pub_type： 临床试验,杂志文章,随机对照试验
doi：10.1007/s00228-002-0464-3
更新日期：2002-06-01 00:00:00
abstract：PURPOSE:To assess the influence of the P450 oxidoreductase 28 SNP (POR 28) on tacrolimus pharmacokinetics in the Chinese population. METHODS:Seventy-one healthy Chinese volunteers enrolled in the study received an oral dose of 2 mg of tacrolimus after providing written informed consent. CYP3A5 3 was genotyped by polym...
journal_title：European journal of clinical pharmacology
pub_type： 临床试验,杂志文章
doi：10.1007/s00228-012-1432-1
更新日期：2013-04-01 00:00:00
abstract：:We have previously shown that inhaled salbutamol further increases the bronchodilator response after the maximum effect of theophylline has been obtained in patients with severe chronic bronchitis. We now report the results of adding maximally effective doses of theophylline to the maximum response obtainable from sal...
journal_title：European journal of clinical pharmacology
pub_type： 杂志文章
doi：10.1007/BF00542540
更新日期：1982-01-01 00:00:00
abstract：:The aim of the study was to examine the effect of chronic angiotensin converting enzyme inhibition on haemodynamics and left ventricular performance during long-lasting exercise at the anaerobic threshold. For this purpose exercise haemodynamics and left ventricular performance were assessed in 14 physically trained h...
journal_title：European journal of clinical pharmacology
pub_type： 临床试验,杂志文章
doi：10.1007/BF00194331
更新日期：1995-01-01 00:00:00
abstract：PURPOSE:Lithium (Li), the first-line treatment of bipolar disorder, was first developed as an immediate-release form with a routine therapeutic drug monitoring 12 h after the last dose. In Europe, the most commonly prescribed form is a sustained release (srLi). Yet no pharmacokinetics (PK) study has been published of s...
journal_title：European journal of clinical pharmacology
pub_type： 杂志文章
doi：10.1007/s00228-018-2605-3
更新日期：2019-04-01 00:00:00
abstract：PURPOSE:The aim of this study was to analyze the cases of gynecomastia associated with α1A-adrenergic receptor antagonists (α1-ARAs) in the Italian spontaneous reporting system database (Rete Nazionale di Farmacovigilanza or RNF) and in the World Health Organization ICSRs database (VigiBase(™)), focusing on tamsulosin ...
journal_title：European journal of clinical pharmacology
pub_type： 杂志文章
doi：10.1007/s00228-014-1700-3
更新日期：2014-08-01 00:00:00
abstract：OBJECTIVE:In vitro studies with human liver microsomes have suggested that the oxidative conversion of mexiletine (MX) to its metabolites is catalyzed by CYP2D6 and is significantly impaired in microsomes with the CYP2D6*10/*10 genotype. Therefore, we examined the influence of the CYP2D6*10 allele on MX pharmacokinetic...
journal_title：European journal of clinical pharmacology
pub_type： 临床试验,杂志文章
doi：10.1007/s00228-003-0656-5
更新日期：2003-09-01 00:00:00
abstract：OBJECTIVE:To assess the effect of ciprofloxacin on the pharmacokinetics of ropivacaine. METHODS. In a double-blind, randomised, cross-over study, nine healthy volunteers were treated for 2.5 days with 500 mg oral ciprofloxacin or placebo twice daily. On day 3, they received a single dose of 0.6 mg/kg ropivacaine intrav...
journal_title：European journal of clinical pharmacology
pub_type： 临床试验,杂志文章,随机对照试验
doi：10.1007/s00228-002-0540-8
更新日期：2003-02-01 00:00:00
abstract：PURPOSE:To investigate possible differences in the time course of vasodilating effects of atrial natriuretic peptide (ANP) and brain natriuretic peptide (BNP) in humans. METHODS:We measured forearm blood flow (FBF) by strain gauge plethymography and cyclic GMP spillover during and after intra-arterial infusions of BNP...
journal_title：European journal of clinical pharmacology
pub_type： 临床试验,杂志文章
doi：10.1007/s00228-008-0516-4
更新日期：2008-09-01 00:00:00
abstract：:The concentration of chlorpromazine (CPZ) in hair was measured to demonstrate its value as an index of individual dosage history and compliance. An animal study using pigmented rats was conducted to confirm the dose-dependent accumulation of CPZ in hair. The concentration of CPZ in hair, newly regrown on a denuded are...
journal_title：European journal of clinical pharmacology
pub_type： 杂志文章
doi：10.1007/BF00315540
更新日期：1993-01-01 00:00:00
abstract：PURPOSE:To determine whether two of the major operational stressors associated with military missions in Afghanistan: dry heat and long durations of soldier patrol (SP), alter the pharmacokinetics of ibuprofen. METHODS:Thirteen healthy and physically fit participants (19-32 years) were randomized to a four-arm crossov...
journal_title：European journal of clinical pharmacology
pub_type： 临床试验,杂志文章,随机对照试验
doi：10.1007/s00228-012-1307-5
更新日期：2013-01-01 00:00:00
abstract：:Ten normal adult tobacco smokers and 10 nonsmoking volunteers 20-31 years of age were the subjects of this study. The tobacco smokers all had a history of daily tobacco smoking. They were asked to stop smoking for 12 hours prior to testing. The Hoffmann (H) reflex and its recovery cycle were measured on different days...
journal_title：European journal of clinical pharmacology
pub_type： 杂志文章
doi：10.1007/BF00196110
更新日期：1994-01-01 00:00:00
abstract：OBJECTIVE:The prevention of contrast-mediated nephropathy (CMN), which accounts for considerable morbidity and mortality, remains a vexing problem. Contrast induced renal vasoconstriction is believed to play a pivotal role in the CMN mechanism. The aim of this pilot study was to examine the safety and efficacy of two d...
journal_title：European journal of clinical pharmacology
pub_type： 杂志文章,随机对照试验
doi：10.1007/s00228-006-0150-y
更新日期：2006-08-01 00:00:00
abstract：:The pharmacokinetics of a new sustained-release preparation of theophylline (Dilatrane à Action Prolongée capsules filled with homogenous microgranules) has been after its studied administration to 7 healthy volunteers at 8 p.m. in order to achieve therapeutic levels at night and in the morning. In separate trials the...
journal_title：European journal of clinical pharmacology
pub_type： 杂志文章
doi：10.1007/BF00542169
更新日期：1984-01-01 00:00:00
abstract：:The bronchodilator activity and side-effects of treatment for 4 days with either 0.085, 0.170 or 0.34 mg/kg bambuterol b.i.d. (a prodrug of terbutaline) or 0.071 mg/kg terbutaline t.i.d. have been evaluated over 12 h, in a double-blind, randomized crossover trial in 19 asthmatic out-patients. Plasma terbutaline concen...
journal_title：European journal of clinical pharmacology
pub_type： 临床试验,杂志文章,随机对照试验
doi：10.1007/BF00614187
更新日期：1986-01-01 00:00:00
abstract：PURPOSE:The survival of esophageal and gastric cancer patients treated with chemotherapy is rarely assessed outside of clinical trials. Therefore, we compared the effectiveness of various curative or palliative chemotherapy regimens on the survival of esophageal and gastric cancer patients in a "real world" clinical se...
journal_title：European journal of clinical pharmacology
pub_type： 杂志文章
doi：10.1007/s00228-020-02883-3
更新日期：2020-07-01 00:00:00
abstract：:The effects of a beta-blocker, carvedilol, on peripheral hemodynamics and hemorheologic parameters were evaluated in 11 geriatric patients with essential hypertension [3 men and 8 women aged 62-79 years (mean, 68.6 years)]. Carvedilol was given orally after breakfast at a dose of 10 or 20 mg daily for 8 weeks. Periphe...
journal_title：European journal of clinical pharmacology
pub_type： 杂志文章
doi：10.1007/BF01409478
更新日期：1990-01-01 00:00:00
abstract：OBJECTIVE:Psychosis is a common complication of the drug treatment of Parkinson's disease (PD). Treatment of this complication is difficult as most antipsychotic drugs worsen motor symptoms of PD. Only the atypical antipsychotic clozapine improves psychosis without worsening of parkinsonism. The aim of the present stud...
journal_title：European journal of clinical pharmacology
pub_type： 杂志文章
doi：10.1007/s00228-002-0441-x
更新日期：2002-05-01 00:00:00
abstract：OBJECTIVE:To determine the prevalence of inappropriate medication use among hospitalized older adults and to identify predictors of this use. METHODS:A total of 5734 patients (mean age 79 years) admitted to geriatric and internal medicine wards participating in the study in 1995 and 1997 were included in this analysis...
journal_title：European journal of clinical pharmacology
pub_type： 杂志文章
doi：10.1007/s00228-003-0600-8
更新日期：2003-06-01 00:00:00
abstract：BACKGROUND:Serious adverse effects have been observed with some non-sedative H1-antihistamines (terfenadine and astemizole) when they were associated with drugs known to inhibit their metabolism. However, this is not a class effect, and this interaction should be considered on a case-by-case basis. The aim of this stud...
journal_title：European journal of clinical pharmacology
pub_type： 杂志文章
doi：10.1007/s00228-005-0917-6
更新日期：2005-06-01 00:00:00
