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@ARTICLE{Fresnais:157171,
author = {M. Fresnais$^*$ and A. Roth and K. I. Foerster and D.
Jäger and S. M. Pfister$^*$ and W. E. Haefeli and J.
Burhenne and R. Longuespée},
title = {{R}apid and {S}ensitive {Q}uantification of {O}simertinib
in {H}uman {P}lasma {U}sing a {F}ully {V}alidated
{MALDI}-{IM}-{MS}/{MS} {A}ssay.},
journal = {Cancers},
volume = {12},
number = {7},
issn = {2072-6694},
address = {Basel},
publisher = {MDPI},
reportid = {DKFZ-2020-01451},
pages = {E1897},
year = {2020},
abstract = {The third-generation tyrosine kinase inhibitor (TKI),
osimertinib, has revolutionized the treatment of patients
with non-small cell lung carcinoma with epidermal growth
factor receptor (EGFR)-activating mutation, and resistant to
first- and second-generation TKIs. Osimertinib is now also
proposed as a first-line therapy, thus extending the scope
of applications in lung oncology. Personalized medicine
approaches are still necessary to monitor if patients are
exposed to adequate concentrations of osimertinib during
their treatment. It would also help to understand the
appearance of new resistances in patients after several
months of dosing with osimertinib. Liquid
chromatography-tandem mass spectrometry (LC-MS/MS) is
currently the gold standard for the quantification of drugs
in plasma enabling pharmacokinetic analyses and patient
monitoring. In the present study, we propose an alternative
to LC-MS/MS methods for the rapid and sensitive
quantification of osimertinib in plasma using
matrix-assisted laser desorption/ionization (MALDI) -MS. The
presented assay requires only 3 min per sample for their
preparation, analysis, and data extraction, and less than 3
h for quantification. A lower limit of quantification (LLOQ)
of 5 ng/mL in plasma was retrieved. The method was fully
validated, following the guidelines of the US Food and Drug
Administration (FDA) and the European Medicines Agency (EMA)
for bioanalytical method validation. The present
developments prove the importance to consider alternative MS
assays for time-efficient quantification of small molecule
inhibitors in plasma in the context of personalized medicine
for targeted therapies.},
cin = {HD01 / B062},
ddc = {610},
cid = {I:(DE-He78)HD01-20160331 / I:(DE-He78)B062-20160331},
pnm = {312 - Functional and structural genomics (POF3-312)},
pid = {G:(DE-HGF)POF3-312},
typ = {PUB:(DE-HGF)16},
pubmed = {pmid:32674434},
doi = {10.3390/cancers12071897},
url = {https://inrepo02.dkfz.de/record/157171},
}