Simultaneous Analytical Method Development of 6-Mercapto purine and 6-Methylmercaptopurine in Plasma by High Performance Liquid Chromatography-Photodiode Array

ABSTRACT

Objective: 6-Mercaptopurin is antineoplastic drug that is included in antimetabolite group and is used in acutelymphoblastic leukemia medication. 6-Mercaptopurin is inactive pro-drug that will be metabolized into metabolites. One of its metabolites is 6-methylmercaptopurine. This study is aimed to optimize the analytical conditions and perform validation for the analysis of 6-mercapto purine and 6-methylmercaptopurine in plasma. Method:Separation was per formed using Waters 2996 HPLC, C18 SunfireTMcolumn (5μm, 250 x 4.6 mm) with the mobile phase containing water-methanol-acetonitrile with gradient elution, and detected at 303 nm. 5-Fluorouracil was used as internal standard. Plasma extraction was done by liquid-liquid extraction using dichloromethane. Result:The method was linear at concentration range of 2.0 – 200.0 ng/mL with r > 0.9991 for 6-mercaptopurine and 20 – 2000 ng/mL with r > 0.9993 for 6-methylmercaptopurine. Accuracy and precision within-run and between-run fulfill the acceptance criteria with % RE and relative standard deviation (% RSD) ≤ 20% (LLOQ) and ≤ 15% (QC samples). 6-Mercaptopurine and 6-methyl mercaptopurine was stable in plasma at least for 21 days when stored at -20ºC. Conclusion:The bio-analytical method was sensitive, selective and all the parameters fulfilled the acceptance criteria of the EMA Bio-analytical Method Validation Guideline, 2011.

KEYWORDS

• 5-fluorouracil
• 6-mercaptopurine
• 6-methylmercaptopurine
• HPLC
• validation

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• DOI10.5530/jyp.2017.1s.8Copy

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