Abstract:
BACKGROUND AND OBJECTIVE:Polyethylene glycol-modified canine uricase (PEG-UHC) prepared with a lower-molecular-weight (5 kDa) PEG is used to treat gout. This study investigated the comparative pharmacokinetics of single and multiple doses of PEG-UHC administered intravenously and a single dose of uricase (UHC) administered intravenously in cynomolgus monkeys. METHODS:A noncompartmental model was used to fit the plasma drug concentration-time curve and calculate the pharmacokinetic parameters of PEG-UHC, which were compared with those obtained for UHC at the equivalent dose (2 mg/kg). To study the pharmacokinetics after multiple dose administration, cynomolgus monkeys were administered five intravenous injections of PEG-UHC (0.5 mg/kg), with one injection performed every 15 days. RESULTS:The area under the curve (AUC) and the maximum plasma concentration (Cmax) of PEG-UHC were positively correlated with dose, whereas plasma half-life (t1/2) and clearance (CL) did not change significantly with increasing dose, suggesting that these pharmacokinetic characteristics are linear. Intravenous PEG-UHC exhibited an average t1/2 that was 125.79 times longer and an AUC0-t that was 64.45 times larger than the corresponding values for UHC at the same dose (2 mg/kg), while the CL of PEG-UHC was 1/72.73 times the CL of intravenous UHC. The plasma drug concentration reached a steady state after five injections, and the t1/2 values following the first and last drug administration did not differ significantly. CONCLUSION:Our data show that PEG-UHC is markedly superior to UHC in terms of duration of action, and that the pharmacokinetics of PEG-UHC in cynomolgus monkeys are linear. Sequential administration of PEG-UHC did not accelerate drug clearance. Our findings provide the basis for future clinical studies of PEG-UHC.
journal_name
Eur J Drug Metab Pharmacokinetjournal_title
European journal of drug metabolism and pharmacokineticsauthors
Li H,Huo J,Sun D,Jiang L,Hu C,Bai Y,Ma X,Zhang H,Shi X,Zhao Z,Zhou J,Lu Y,Zhang Cdoi
10.1007/s13318-020-00612-wsubject
Has Abstractpub_date
2020-08-01 00:00:00pages
445-451issue
4eissn
0378-7966issn
2107-0180pii
10.1007/s13318-020-00612-wjournal_volume
45pub_type
杂志文章abstract::There is current emphasis for extended integration of pharmacokinetics (PK) and pharmacodynamics (PD) into all phases of new drug development, including large-scale clinical trials. In this paper, we focus on study design and data analysis issues for the investigation of pharmacokinetic/pharmacodynamic and blood level...
journal_title:European journal of drug metabolism and pharmacokinetics
pub_type: 杂志文章,评审
doi:10.1007/BF03220009
更新日期:1993-01-01 00:00:00
abstract::A total of 16 metabolites of bromocriptine could be isolated from rat bile and incubates of rat liver cell preparations using [6-methyl-14C]bromocriptine as substrate. Separation and purification was achieved by reversed-phase liquid chromatography and preparative thin-layer chromatography in conjunction with radioact...
journal_title:European journal of drug metabolism and pharmacokinetics
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doi:10.1007/BF03189631
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abstract::Herbal medicinal products have to meet comparable standards concerning the assessment of efficacy, safety and (bio)pharmaceutical quality as chemically defined synthetic drugs. However, these requirements are not fulfilled for many herbal products so far, particularly regarding in vitro dissolution and in vivo bioavai...
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abstract::The purpose of this study was to determine the distribution of cyclosporin A (CsA) in various ocular fluids and tissues in the rabbit by two routes of administration. CsA was administered to two groups of two rabbits either by intramuscular route at a dose of 25 mg/kg/day or by local route using eyedrops, at a dose of...
journal_title:European journal of drug metabolism and pharmacokinetics
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doi:
更新日期:1991-01-01 00:00:00
abstract::This study describes an approach permitting the determination of compartmental concentration and drug kinetics in the case of chronobiological variations of elimination rate. ...
journal_title:European journal of drug metabolism and pharmacokinetics
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doi:10.1007/BF03190035
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abstract::The disposition kinetics of the N-oxide of picobenzide were studied after administration to rabbits at a bolus dose of 30 mg/kg of picobenzide intravenously. The biotransformation process fits a first-order kinetic process, and the metabolite shows good access capacity to the peripheral compartment. The N-oxide of pic...
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abstract::It is known that substituted hydrazide hydrazone derivatives have several biological and pharmacological activities; there is limited literature on the metabolism of hydrazide hydrazones in rats. In our previous study, 4-fluorobenzoic acid [(5-nitro-2-furanyl)methylene]hydrazide (S) was found active against Staphyloco...
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abstract:BACKGROUND AND OBJECTIVES:Lidocaine 5% medicated plaster is the first lidocaine containing product for chronic use. As no previous investigations have been conducted to evaluate the population pharmacokinetics of long-term exposure to lidocaine 5% medicated plasters, further insights into the evaluation of the pharmaco...
journal_title:European journal of drug metabolism and pharmacokinetics
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abstract:BACKGROUND AND OBJECTIVES:The disposition of azithromycin in the human eye following topical administration has not been fully explored. Population pharmacokinetic (PopPK) modeling can allow useful conclusions to be drawn based on limited tear sampling data. The aim of this study was therefore to develop and evaluate a...
journal_title:European journal of drug metabolism and pharmacokinetics
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journal_title:European journal of drug metabolism and pharmacokinetics
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abstract::The pharmacokinetics of amiodarone was studied after single and multiple dosing in two groups of male Wistar and Albino rats. The first group (40 rats) received a single intraperitoneal (i.p.) dose of amiodarone (100 mg/kg) and 4 rats sacrificed 1, 2, 4, 6, 12, 18, 24, 36, 48 and 72 hours post dosing. The second group...
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abstract:BACKGROUND AND OBJECTIVES:Even though lithium has been used for the treatment of bipolar disorder for several decades, its toxicities are still being reported. The major limitation in the use of lithium is its narrow therapeutic window. Several methods have been proposed to predict lithium doses essential to attain the...
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abstract::We studied the hepatic handling of bromosulfophthalein in healthy rabbits with hepatic coccidiosis 28 days after an experimental infection with sporulated oocysts of Eimeria stiedai, an experimental model of liver disease histopathologically resembling primary biliary cirrhosis in man. A pharmacokinetic study of the r...
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journal_title:European journal of drug metabolism and pharmacokinetics
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