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van Veelen A, van Geel R, Schoufs R, de Beer Y, Stolk LM, Hendriks LEL, Croes S. Development and validation of an HPLC-MS/MS method to simultaneously quantify alectinib, crizotinib, erlotinib, gefitinib and osimertinib in human plasma samples, using one assay run. Biomed Chromatogr 2021; 35:e5224. [PMID: 34363425 DOI: 10.1002/bmc.5224] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2021] [Revised: 06/17/2021] [Accepted: 08/02/2021] [Indexed: 11/06/2022]
Abstract
A liquid chromatography-tandem mass spectrometry method was developed and validated to quantify alectinib, crizotinib, erlotinib and gefitinib. This assay can be combined with our method for osimertinib, allowing quantification of the most used ALK- and EGFR-tyrosine kinase inhibitors (TKIs) in non-small cell lung cancer with a single-assay setup. Chromatographic separation was performed on a HyPurity® C18 analytical column using an elution gradient of ammonium acetate in water and in methanol, both acidified with formic acid 0.1%. Detection and quantification were performed using a triple quad mass spectrometer with an electrospray ionization interface. This method led to robust results, as the selectivity, carryover, precision and accuracy met all pre-specified requirements. The assay was validated over a linear range of 100-2,000 ng/ml for alectinib and erlotinib and 50-1,000 ng/ml for crizotinib and gefitinib. Alectinib, crizotinib, erlotinib and gefitinib were all stable for at least 4 h in whole blood (at room temperature and at 4°C) and for at least 1 month in EDTA plasma when stored at -80°C, while osimertinib proved to be unstable at room temperature. Although high-performance liquid chromatography was used, the run time was short and comparable with other methods using ultra-high performance liquid chromatography.
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Affiliation(s)
- Ard van Veelen
- Department of Clinical Pharmacy and Toxicology, Maastricht University Medical Center+, Maastricht, the Netherlands.,CARIM School for Cardiovascular Disease, Maastricht University Medical Center+, Maastricht, the Netherlands.,Department of Pharmacoepidemiology and Clinical Pharmacology, Utrecht Institute for Pharmaceutical Sciences, Utrecht, the Netherlands
| | - Robin van Geel
- Department of Clinical Pharmacy and Toxicology, Maastricht University Medical Center+, Maastricht, the Netherlands.,CARIM School for Cardiovascular Disease, Maastricht University Medical Center+, Maastricht, the Netherlands
| | - Roy Schoufs
- Department of Clinical Pharmacy and Toxicology, Maastricht University Medical Center+, Maastricht, the Netherlands
| | - Yvo de Beer
- Department of Clinical Pharmacy and Toxicology, Maastricht University Medical Center+, Maastricht, the Netherlands
| | - Leo M Stolk
- Department of Clinical Pharmacy and Toxicology, Maastricht University Medical Center+, Maastricht, the Netherlands
| | - Lizza E L Hendriks
- Department of Pulmonary Diseases, GROW-School for Oncology and Developmental Biology, Maastricht University Medical Center+, Maastricht, the Netherlands
| | - Sander Croes
- Department of Clinical Pharmacy and Toxicology, Maastricht University Medical Center+, Maastricht, the Netherlands.,CARIM School for Cardiovascular Disease, Maastricht University Medical Center+, Maastricht, the Netherlands
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Miszta A, van Deursen B, Schoufs R, Hof M, Hermens WT. Absence of ethanol-induced interdigitation in supported phospholipid bilayers on silica surfaces. Langmuir 2008; 24:19-21. [PMID: 18044939 DOI: 10.1021/la702346e] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
Membranes prepared by the adsorption of phospholipid vesicles on solid supports are much-used model systems in biomedical research. However, there is accumulating evidence that such membranes may not always be equivalent to the free-standing cellular membranes that they are modeling. In the present study, sonicated DOPC/DOPS (80/20 mol %) vesicles were adsorbed on hydrophilic silica surfaces, a system that has been demonstrated to produce confluent bilayers. In addition, pure DOPC and DLPC membranes were studied. It is demonstrated that ethanol-induced membrane interdigitation, as demonstrated for free-standing bilayers, does not occur in these supported membranes.
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Affiliation(s)
- Adam Miszta
- J. Heyrovsky Institute of Physical Chemistry v.v.i., Academy of Sciences of the Czech Republic, Dolejskova 3, Prague, Czech Republic
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