title: Improved HPLC method for doxorubicin quantification in rat plasma to study the pharmacokinetics of micelle-encapsulated and liposome-encapsulated doxorubicin formulations.
abstract: An improved simple, rapid and accurate HPLC method for quantification of doxorubicin derived from micelle-encapsulated or liposome-encapsulated doxorubicin formulation in rat plasma was described. The mobile phase consisting of a mixture of methanol-water [containing 0.1% formic acid anhydrous and 0.1% ammonia solution (25%), pH 3.0], 60:40, was delivered at a flow rate of 1.0 mL/min. Sample preparation for micelle- or liposome-encapsulated doxorubicin in rat plasma were achieved directly by protein precipitation with acetonitrile. Doxorubicin and daunorubicin (internal standard, IS) were separated on a C(18) reversed-phase HPLC column and quantified by a fluoresence detection with an excitation wavelength of 475 nm and an emission wavelength of 580 nm. The linearity was obtained over the range of 5.0-1000.0 ng/mL and 1.0-200.0 microg/mL for doxorubicin and the lower limit of quantitation was 5.0 ng/mL. For each level of quality control samples, inter- and intra-assay precision was less than 9.6 and 5.1% (relative standard deviation), respectively, and percentage error was within +/-2.6%. The extraction recoveries of doxorubicin in the range of 10 ng/mL to 100 microg/mL in rat plasma were between 94.1 and 105.6%. This method was successfully applied to the pharmacokinetic study of doxorubicin formulations after i.v. administration to rats.
authors.affiliation: Tianjin Key Laboratory of Pharmacokinetics and Pharmacodynamics, Tianjin Institute of Pharmaceutical Research, Tianjin 300193, People's Republic of China. weigl510@163.com
authors.forename: Guangli
authors.initials: G
authors.lastname: Wei
authors.forename: Shuhua
authors.initials: S
authors.lastname: Xiao
authors.forename: Duanyun
authors.initials: D
authors.lastname: Si
authors.forename: Changxiao
authors.initials: C
authors.lastname: Liu
mesh_terms: D000818:Animals; D000903:Antibiotics, Antineoplastic / Q000097:blood* / Q000737:chemistry / Q000493:pharmacokinetics; D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D003630:Daunorubicin / Q000097:blood* / Q000737:chemistry / Q000302:isolation & purification / Q000493:pharmacokinetics; D004317:Doxorubicin / Q000097:blood* / Q000737:chemistry / Q000302:isolation & purification / Q000493:pharmacokinetics; D005260:Female; D008081:Liposomes / Q000097:blood; D008297:Male; D008823:Micelles; D051381:Rats; D017208:Rats, Wistar; D012680:Sensitivity and Specificity
chemical_list: D000903:Antibiotics, Antineoplastic; D008081:Liposomes; D008823:Micelles; D004317:Doxorubicin; D003630:Daunorubicin