2. Academic Validation
  3. Quantitative bioanalytical assay for the selective RET inhibitors selpercatinib and pralsetinib in mouse plasma and tissue homogenates using liquid chromatography-tandem mass spectrometry

Quantitative bioanalytical assay for the selective RET inhibitors selpercatinib and pralsetinib in mouse plasma and tissue homogenates using liquid chromatography-tandem mass spectrometry

  • J Chromatogr B Analyt Technol Biomed Life Sci. 2020 Jun 15;1147:122131. doi: 10.1016/j.jchromb.2020.122131.
Rahime Şentürk 1,  Yaogeng Wang 2,  Alfred H Schinkel 3,  Jos H Beijnen 4,  Rolf W Sparidans 5
Affiliations

Affiliations

  • 1 Utrecht University, Faculty of Science, Department of Pharmaceutical Sciences, Division of Pharmacology, Universiteitsweg 99, 3584 CG Utrecht, the Netherlands.
  • 2 The Netherlands Cancer Institute, Division of Pharmacology, Plesmanlaan 121, 1066 CX Amsterdam, the Netherlands. Electronic address: y.wang@nki.nl.
  • 3 The Netherlands Cancer Institute, Division of Pharmacology, Plesmanlaan 121, 1066 CX Amsterdam, the Netherlands. Electronic address: a.schinkel@nki.nl.
  • 4 Utrecht University, Faculty of Science, Department of Pharmaceutical Sciences, Division of Pharmacoepidemiology & Clinical Pharmacology, Universiteitsweg 99, 3584 CG Utrecht, the Netherlands; The Netherlands Cancer Institute, Department of Pharmacy & Pharmacology, Louwesweg 6, 1066 EC Amsterdam, the Netherlands. Electronic address: j.beijnen@nki.nl.
  • 5 Utrecht University, Faculty of Science, Department of Pharmaceutical Sciences, Division of Pharmacology, Universiteitsweg 99, 3584 CG Utrecht, the Netherlands. Electronic address: r.w.sparidans@uu.nl.
PMID: 32416592 DOI: 10.1016/j.jchromb.2020.122131
Abstract

Selpercatinib and pralsetinib are potent and selective tyrosine kinase inhibitors targeting the rearranged during transfection (RET) receptor in various types of Cancer. In this study, a bioanalytical assay was developed and fully validated for selpercatinib and pralsetinib in mouse plasma and partially in eight mouse tissue homogenates using liquid chromatograph-tandem mass spectrometry. Samples were pre-treated by protein precipitation with acetonitrile using erlotinib as internal standard. Separation of the analytes was performed on an ethylene bridged octadecyl silica C18 column by gradient elution using ammonium hydroxide (in water) and methanol. Analytes were detected by positive electrospray ionization in selected reaction monitoring mode. A linear concentration range of 2-2000 ng/ml was used for the validation of the assay for both inhibitors. The precision values (within-day and between-day) ranged between 3.4 and 10.2% for selpercatinib and 3.1-14.6% for pralsetinib in all matrices. Furthermore, data obtained for accuracy were between 91.7 and 109.3% and 85.1-114.1% for selpercatinib and pralsetinib, respectively. No significant matrix effects or extraction losses were observed and both analytes were stable under all investigated conditions. Finally, a pilot study for selpercatinib in mice was conducted employing this method, followed by a successful incurred sample reanalysis.

Keywords

LC-MS/MS; Mouse plasma; Pralsetinib; RET inhibitor; Selpercatinib; Tissue homogenate.

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