eprintid: 346 rev_number: 11 eprint_status: archive userid: 5 dir: disk0/00/00/03/46 datestamp: 2017-10-10 10:03:07 lastmod: 2017-10-10 10:47:31 status_changed: 2017-10-10 10:03:07 type: article metadata_visibility: show creators_name: Supandi, Supandi creators_name: Yahdiana Harahap, Yahdiana creators_name: Harmita, Harmita creators_name: Rizka Andalusia, Rizka creators_name: Marlina Ika, Marlina creators_id: supandiuhamka@gmail.com corp_creators: Department of Pharmacy, Faculty of Pharmacy and Science, UHAMKA, Jakarta, Indonesia title: ANALYSIS OF 6-MERCAPTOPURINE AND 6-METHYLMERCAPTOPURINE IN DRIED BLOOD SPOTS USING LIQUID CHROMATOGRAPHY-TANDEM MASS SPECTROMETRY AND ITS APPLICATION IN CHILDHOOD ACUTE LYMPHOBLASTIC LEUKEMIA PATIENTS ispublished: pub subjects: RS abstract: Objective: To analyze and validate 6-mercaptopurine (6-MP) and 6-methylmercaptopurine (6-MMP) in dried blood spots (DBS) using liquid chromatography-tandem mass spectrometry (LC/MS-MS). Methods: Bio-sampling dried blood spot with DBS-CAMAG® paper diameter of 8 mm and extracted with acetonitrile-methanol (1:3) containing internal standard 5-fluorouracil (5-FU). Separation was performed with C18 column Acquity® 1.7 μm (2.1 mm × 100 mm), with a mobile phase mixture of 0.1% formic acid in water 0.1% formic acid in acetonitrile with gradient elution and flow rate 0.2 ml/min. Mass detection was Waters Xevo TQD with positive electrospray ionization (ESI) for 6-MP, 6-MMP and negative ESI for 5-FU in multiple reaction monitoring modes. The ions of 6-MP was detected at m/z 153.09->119.09, 6-MMP at m/z 167.17->126.03, and 5-FU at m/z 129.15->42.05. Results: This method fulfill the requirements of selectivity, linearity, lower limit of quantification, accuracy, precision, carry-over, matrix effects, and stability which refers to the european medicines agency (EMEA) guidelines. The linearity of 0.99 was 26-1000 ng/mL for 6-MP and 6-MMP, respectively. The validated method was applied to two childhood ALL maintenance phase. Retrieved 6-MP levels of 10.37 pmol/8×108 erythrocytes, respectively. The levels of 6-MMP gained 16.59 pmol/8×108 erythrocytes, respectively. Conclusion: The developed LC/MS-MS method is valid to analysis 6-MP and 6-MMP in DBS simultaneous in vitro according to EMEA guidelines. The method was successfully applied to authentic capillary blood samples from two childhood patients with ALL in the maintenance phase. Keywords: 6-mercaptopurine, 6-methylmercaptopurine, Dried blood spots, Acute lymphoblastic leukemia. date: 2017 official_url: http://dx.doi.org/10.22159/ajpcr.2017.v10i9.19790 full_text_status: public publication: Asian Journal of Pharmaceutical and Clinical Research volume: 10 number: 9 pagerange: 120-125 refereed: TRUE issn: 0974-2441 citation: Supandi, Supandi dan Yahdiana Harahap, Yahdiana dan Harmita, Harmita dan Rizka Andalusia, Rizka dan Marlina Ika, Marlina (2017) ANALYSIS OF 6-MERCAPTOPURINE AND 6-METHYLMERCAPTOPURINE IN DRIED BLOOD SPOTS USING LIQUID CHROMATOGRAPHY-TANDEM MASS SPECTROMETRY AND ITS APPLICATION IN CHILDHOOD ACUTE LYMPHOBLASTIC LEUKEMIA PATIENTS. Asian Journal of Pharmaceutical and Clinical Research, 10 (9). pp. 120-125. ISSN 0974-2441 document_url: http://repository.uhamka.ac.id/id/eprint/346/1/AJPCR.pdf