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  • Title: Human DBS sampling with LC-MS/MS for enantioselective determination of metoprolol and its metabolite O-desmethyl metoprolol.
    Author: Liang X, Jiang H, Chen X.
    Journal: Bioanalysis; 2010 Aug; 2(8):1437-48. PubMed ID: 21083344.
    Abstract:
    BACKGROUND: The dried blood spots (DBS) sampling technique has been gaining wide interest in preclinical and clinical studies due to its inherent advantages. However, the impact of DBS sampling on chiral compounds in terms of stability and detection sensitivity has not been studied yet. RESULTS: A high-throughput, sensitive and enantioselective LC-MS/MS-based bioanalytical method was developed and validated for the simultaneous determination of individual enantiomers of metoprolol and its metabolite O-desmethylmetoprolol (O-DMM)in human whole blood using the DBS sampling technique. CONCLUSIONS: The developed DBS LC-MS/MS assay has a run time of 3 min, shorter than all previous methods while achieving complete baseline separation of enantiomeric metoprolol and O-DMM. This study demonstrates the applicability of DBS for chiral molecules analysis.
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