Cited by 37Pharmacogenetics and Drug MetabolismLung Cancer Treatments and MutationsAnalytical Methods in Pharmaceuticals

Detection and characterization of olmutinib reactive metabolites by LC–MS/MS: Elucidation of bioactivation pathways

Attwa, Mohamed W., Kadi, Adnan A., Abdelhameed, Ali S.·2020·Journal of Separation Science

Abstract

Olmutinib (Olita™) is an orally bioavailable third generation epidermal growth factor receptor tyrosine kinase inhibitor. Olmutinib was approved in South Korea in May 2016 for the treatment of patients suffering from locally advanced or metastatic epidermal growth factor receptor T790M mutation‐positive non‐small cell lung cancer. Reactive olmutinib intermediates may be responsible for the severe side effects associated with the treatment. However, literature review revealed no previous reports on the structural identification of reactive olmutinib metabolites. In this work, the formation of reactive olmutinib metabolites in rat liver microsomes was investigated. Methoxylamine, glutathione, and potassium cyanide were used as capturing agents for aldehyde, iminoquinones, and iminium intermediates, respectively. The stable complexes formed were identified using liquid chromatography–tandem mass spectrometry. The major phase I metabolic pathway observed in vitro was hydroxylation of the piperazine ring. Seven potential reactive intermediates were characterized, including three iminium ions, three iminoquinones, and one aldehyde. Based on the findings, various bioactivation pathways were postulated. Hence, identifying the reactive intermediates of olmutinib that may be the cause of severe side effects can provide new insights, leading to improved treatments for patients.

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Crossref · 10.1002/jssc.201900818

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Authors
Attwa, M. W., Kadi, A. A., & Abdelhameed, A. S.
Affiliations
  • Mansoura University (EG)
  • King Saud University (SA)
Corresponding author
Abdelhameed, Ali S.
Venue
Journal of Separation Science
Publisher
Wiley
Published
2019-12-02
Volume
43
Issue
4
Pages
708-718
ISSN
  • 1615-9306 (ISSN-L)
  • 1615-9314
OpenAlex
W2984767608
Cited by
37
References
48
Citations by year
2026: 2 · 2025: 1 · 2024: 2 · 2023: 6 · 2022: 5 · 2021: 12 · 2020: 9
FWCI
6.80
Type
journal article
Language
en
Open access
closed
Locations
  • Journal of Separation Science (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Life Sciences › Pharmacology, Toxicology and Pharmaceutics › Pharmacology › Pharmacogenetics and Drug Metabolism
  • Health Sciences › Medicine › Pulmonary and Respiratory Medicine › Lung Cancer Treatments and Mutations
  • Physical Sciences › Chemistry › Analytical Chemistry › Analytical Methods in Pharmaceuticals
Keywords
reactive metabolites, epidermal growth factor receptor tyrosine kinase inhibitors, iminium intermediates, iminoquinone, aldehyde intermediates, glutathione adducts, adverse drug reactions, non-small cell lung cancer, T790M mutation, rat liver microsomes
MeSH terms
Animals, Antineoplastic Agents, Chromatography, High Pressure Liquid, Humans, Microsomes, Liver, Piperazines, Pyrimidines, Molecular Structure, Protein Kinase Inhibitors, Rats, Tandem Mass Spectrometry

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