Simultaneous Analysis of 6-Mercaptopurine, 6-Methylmercaptopurine, and 6-Thioguanosine-5’-monophosphate in Dried Blood Spot Using Ultra Performance Liquid Chromatography Tandem Mass Spectrometry

https://doi.org/10.22146/ijc.31116

Supandi Supandi(1*), Yahdiana Harahap(2), Harmita Harmita(3), Rizka Andalusia(4)

(1) Department of Pharmacy, Faculty of Pharmacy and Science UHAMKA, Jl. Delima II Klender Jakarta 13460, Indonesia
(2) Faculty of Pharmacy, Universitas Indonesia, Jl. Campus UI Depok 16424, Indonesia
(3) Faculty of Pharmacy, Universitas Indonesia, Jl. Campus UI Depok 16424, Indonesia
(4) Department of Research and Development of Dharmais Cancer Hospital, Jl. S. Parman Kav. 84-86 Slipi Jakarta 11420, Indonesia
(*) Corresponding Author

Abstract


6-Mercaptopurine is a chemotherapeutic agent of the antimetabolite class. This study aims to analyze simultaneous validation of 6-mercaptopurine (6-MP), 6-methylmercaptopurine (6-MMP), and 6-thioguanosine-5’-monophosphate (6-TGMP) in dried blood spot (DBS) using ultra performance liquid chromatography-tandem mass spectrometry (UPLC-MS/MS). An accurate volume of 60 μL blood was spotted onto DBS-CAMAG paper and then extracted using methanol 90% (v/v) containing an internal standard of 5-fluorouracil (5-FU). Separation was performed using a Waters Acquity UPLC BEH AMIDA column 1.7 μm (2.1 x 100 mm) with a mobile phase mixture of 0.2% (v/v) formic acid in water−0.1% (v/v) formic acid in acetonitrile-methanol with gradient elution and flow rate of 0.2 mL/min. Mass detection was done using Waters Xevo TQD with positive electrospray ionization (ESI) for 6-MP, 6-MMP, 6-TGMP and negative ESI for 5-FU, in multiple reaction monitoring mode. Detection rates of 6-MP, 6-MMP, 6-TGMP and 5-FU were m/z 153.09 > 119.09; 167.17 > 126.03; 380.16 > 168.00); 129.09 > 42.05, respectively. This method is linear across the range 25.5–1020 ng/mL for 6-MP, 6-MMP and 6-TGMP. This method is valid for the in vitro simultaneous analysis of 6-MP, 6-MMP and 6-TGMP in DBS, based on European Medicine Agency guidelines.

Keywords


6-mercaptopurine; dried blood spot; simultaneous; method validation

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DOI: https://doi.org/10.22146/ijc.31116

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