Determination of lansoprazole, 5-hydroxylansoprazole, and lansoprazole sulfone in human plasma for CYP2C19 and CYP3A4 phenotyping

  • Katarína Kostolanská
  • Ondřej Peš
  • Ondřej Zendulka
  • Jan Máchal
  • Jan JuřicaEmail author
Original Paper


A simple and sensitive liquid chromatography method with absorbance or mass spectrometry detection was developed and validated for the determination of lansoprazole, lansoprazole sulfone, and 5-hydroxylansorpazole in human serum with omeprazole as an internal standard. Analytes were, after an extraction step with a mixture of isopropyl alcohol: dichloromethane (2:8, v/v), separated in a gradient elution (acetonitrile: 20 mM ammonium formate) and detected at 280 and 300 nm or by monitoring selective reactions in a triple quadrupole mass analyzer. The limits of detection were, for all analytes, below 2 ng/mL and 3 pg/mL in the LC UV and LC MS method, respectively. The combined linear dynamic range exceeded 5 orders of magnitude. The method was successfully applied in the assessment of CYP2C19 and CYP3A4 metabolic phenotypes in ST-elevated myocardial infarction patients receiving novel anticoagulant treatment.


Cytochrome P450 Phenotype Lansoprazole 5-Hydroxylansoprazole Lansoprazole sulfone Liquid chromatography Mass spectrometry Metabolites 



This work was supported by funds from the Faculty of Medicine MU to a junior researcher Ondřej Peš and by the Specific University Research Grant (MUNI/A/1132/2017, MUNI/A/0910/2017) provided by the Ministry of Education, Youth and Sports of the Czech Republic and by the project no. LQ1605 from the National Program of Sustainability II (MEYS CR).

Compliance with ethical standards

Conflict of interest

Authors declare there are no potential conflicts of interest to disclose.


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Copyright information

© Institute of Chemistry, Slovak Academy of Sciences 2019

Authors and Affiliations

  1. 1.Department of Biochemistry, Faculty of MedicineMasaryk UniversityBrnoCzech Republic
  2. 2.Department of Pharmacology, Faculty of MedicineMasaryk UniversityBrnoCzech Republic
  3. 3.Department of Pathological Physiology, Faculty of MedicineMasaryk UniversityBrnoCzech Republic
  4. 4.Department of Human Pharmacology and ToxicologyUniversity of Veterinary and Pharmaceutical Sciences BrnoBrnoCzech Republic
  5. 5.Department of Biochemistry, Faculty of ScienceMasaryk UniversityBrnoCzech Republic

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