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 polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) and POR*28 was genotyped by PCR-direct sequencing. Tacrolimus whole blood concentrations were determined by ultra performance liquid chromatography-tandem mass spectrometry and the pharmacokinetics analyses was evaluated by nonparametric methods. RESULTS:The frequencies of CYP3A5 3 and POR 28 allele were 73.3 % and 29.6 %, respectively. No significant differences existed in tacrolimus pharmacokinetics between the POR 28 CC homozygotes (n = 32) and the POR 28 T allele (n = 39) in all subjects. The mean tacrolimus AUC0-24, AUC0-∞ and Cmax for the POR 28 CC (n = 14) homozygotes in CYP3A5 expressers (CYP3A5 1/ 1 or 1/ 3 genotype) were 71.5 ± 38.9 h ng/mL, 94.3 ± 58.3 h ng/mL and 17.6 ± 9.8 ng/mL, which were much higher than the POR 28 CT heterozygotes (n = 17) of 46.7 ± 24.9 h ng/mL, 57.4 ± 33.9 h ng/mL and 11.2 ± 6.4 ng/mL (P < 0.05, respectively). We did not observe any significant differences in tacrolimus pharmacokinetics between the POR 28 CC homozygotes (n = 18) and POR 28 T carriers (n = 22) in CYP3A5 nonexpressers (CYP3A5 3/ 3 carriers). CONCLUSIONS:The POR 28 CT genotype presented a significantly lower level of tacrolimus exposure (AUC, Cmax) compared with the POR 28 CC genotype in CYP3A5-expressing subjects. It suggested that the POR 28 genetic polymorphism might also be responsible for the marked interindividual variability of tacrolimus besides the CYP3A5 3 genetic polymorphism.
journal_name
Eur J Clin Pharmacoljournal_title
European journal of clinical pharmacologyauthors
Zhang JJ,Zhang H,Ding XL,Ma S,Miao LYdoi
10.1007/s00228-012-1432-1subject
Has Abstractpub_date
2013-04-01 00:00:00pages
807-12issue
4eissn
0031-6970issn
1432-1041journal_volume
69pub_type
临床试验,杂志文章abstract::To evaluate the influence of the stomach and the cholinergic system on gallbladder contraction induced by physiological stimuli, the reduction in gallbladder volume in 7 healthy volunteers has been studied by real-time ultrasonography after the oral and intraduodenal administration of olive oil, preceded by pretreatme...
journal_title:European journal of clinical pharmacology
pub_type: 临床试验,杂志文章
doi:10.1007/BF00315412
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abstract::Although the aminopyrine breath test has received much attention, the question has not yet been settled whether pharmacological or tracer doses of the drug should be used. Nine volunteers were given 14C-aminopyrine 9 mg/kg or a tracer amount, in a randomized sequence and according to a crossover design. The specific a...
journal_title:European journal of clinical pharmacology
pub_type: 临床试验,杂志文章,随机对照试验
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abstract::The possible interaction between cetirizine 2 HCl and alcohol was studied in a double-blind, cross-over trial in 36 healthy volunteers. The performance of each volunteer was tested with a battery of five objective psychometric tests, and their subjective feelings were evaluated by visual analogue scales, and by extens...
journal_title:European journal of clinical pharmacology
pub_type: 临床试验,杂志文章
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abstract:OBJECTIVE:The aim of the present study was to investigate the pharmacokinetic profile of tramadol hydrochloride in neonates, born from mothers who underwent analgesia with tramadol for the relief of labour pain. METHODS:Intramuscular tramadol (100--250 mg) was administered to 22 mothers giving birth who requested pain...
journal_title:European journal of clinical pharmacology
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doi:10.1007/s00228-005-0955-0
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更新日期:2002-05-01 00:00:00
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abstract:OBJECTIVE:Iloprost is a potent PGI2 mimetic, which has been shown to be therapeutically effective in several vascular disorders. Due to its rapid clearance from the central compartment, iloprost is administered mainly by i.v. infusion, which limits its use to hospitalized patients. In order to improve pharmacotherapeut...
journal_title:European journal of clinical pharmacology
pub_type: 临床试验,杂志文章,多中心研究
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abstract::The bronchodilator effect and side-effects of a single oral dose of enprofylline were compared with the corresponding actions of a therapeutic dose of theophylline in 20 asthmatic patients, in a randomized cross-over clinical trial. Enprofylline 4 mg/kg and theophylline 8 mg/kg produced mean maximum plasma levels of 4...
journal_title:European journal of clinical pharmacology
pub_type: 临床试验,杂志文章,随机对照试验
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journal_title:European journal of clinical pharmacology
pub_type: 临床试验,杂志文章
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abstract::An open, dose-titration study of alfuzosin, a new selective post-synaptic alpha 1-adrenoceptor antagonist with additional direct vasodilator properties has been performed. After a 3-week run-in placebo period, 12 patients with essential hypertension received alfuzosin 5 mg oral b.d., and then the dose was doubled ever...
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journal_title:European journal of clinical pharmacology
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abstract::The levels of doxycycline in serum, bile and the gallbladder wall were determined in 25 patients during cholecystectomy, by means of bioassay after previous intravenous administration of doxycycline. The mean biliary level exceeded 20 microgram/ml, and the mean level in the gallbladder wall was greater than 2 microgra...
journal_title:European journal of clinical pharmacology
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journal_title:European journal of clinical pharmacology
pub_type: 临床试验,杂志文章,随机对照试验
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journal_title:European journal of clinical pharmacology
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journal_title:European journal of clinical pharmacology
pub_type: 临床试验,杂志文章
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pub_type: 临床试验,杂志文章,随机对照试验
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journal_title:European journal of clinical pharmacology
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journal_title:European journal of clinical pharmacology
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journal_title:European journal of clinical pharmacology
pub_type: 临床试验,杂志文章,随机对照试验
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journal_title:European journal of clinical pharmacology
pub_type: 临床试验,杂志文章
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journal_title:European journal of clinical pharmacology
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