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A high performance liquid chromatography method for the quantitative
determination of erlotinib in the plasma of tumor bearing BALB/c nude
mice and its application in a pharmacokinetic study

Han-Qing Li, Ye Chen, Zai-Quan Li, Chen-Hui Deng, Liang Li, Shan-Shan Bi, Meng-Yao Li, Tian-Yan Zhou*, Wei Lu*   

  1. 1. State Key Laboratory of Natural and Biomimetic Drugs, Peking University Health Science Center, Beijing 100191, China
    2. Department of Pharmaceutics, School of Pharmaceutical Sciences, Peking University Health Science Center, Beijing 100191, China
    3. Department of Pathology, School of Basic Medical Sciences, Peking University Health Science Center, Beijing 100191, China
  • Received:2011-03-07 Revised:2011-04-22 Online:2011-05-06 Published:2011-05-06
  • Contact: Tian-Yan Zhou*, Wei Lu*

Abstract:

A new HPLC-UV method was developed and validated for the quantitative determination of epidermal growth factor receptor inhibitor erlotinib in the plasma of tumor bearing BALB/c nude mice. Erlotinib and its internal standard 1-(3-((6,7-bis (2-methoxyethoxy) quinazolin-4-yl) amino) phenyl) ethanone were extracted from mice plasma samples using liquid-liquid extraction with a mixed solvent of methyl t-butyl ether and ethyl acetate (9:1, v/v). Chromatographic separation was performed on a Luna C18 column (4.6 mm×250 mm, 5 μm) with acetonitrile: 5 mM potassium phosphate buffer pH = 5.2 (41:59, v/v) as the mobile phase. UV detector was set at the wavelength of 345 nm, and the flow rate was 1.0 mL/min. The calibration curve was linear over the range of 20-10 000 ng/mL with acceptable intra- and inter-day precision and accuracy. The intra-day and inter-day precisions were within the range of 1.69%-5.66%, and the accuracies of intra- and inter-day assays were within the range of 105%-113%. The mean recoveries were 85.2% and 96.1% for erlotinib and IS, respectively. This method was successfully applied to a pharmacokinetic study in tumor bearing BALB/c nude mice following single oral administration at the dose of 12.5 mg/kg. The main pharmacokinetic parameters were as follows: Cmax was 4.67 μg/mL, Tmax was 1.0 h, T1/2 was 2.78 h, and AUC0-24 h was 18.0 μg/mL∙h.

Key words: Erlotinib, HPLC-UV, Liquid-liquid extraction, Pharmacokinetics, Epidermal growth factor receptor, Tumor

CLC Number: 

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