A novel LC-MS/MS method for the determination of favipiravir ribofuranosyl-5'-triphosphate (T-705-RTP) in human peripheral mononuclear cells.

  • Elizabeth Challenger
  • , Sujan Dilly-Penchala
  • , Colin Hale
  • , Richard Fitzgerald
  • , Helen Reynolds
  • , Justin Chiong
  • , Tim Rowland
  • , Tom Fletcher
  • , Saye Khoo
  • , Laura Else

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

Favipiravir is a broad-spectrum antiviral that is metabolised intracellularly into the active form, favipiravir ribofuranosyl-5'-triphosphate (F-RTP). Measurement of the intracellular concentration of F-RTP in mononuclear cells is a crucial step to characterising the pharmacokinetics of F-RTP and to enable more appropriate dose selection for the treatment of COVID-19 and emerging infectious diseases. The described method was validated over the range 24 - 2280 pmol/sample. Peripheral blood mononuclear cells (PBMCs) were isolated from whole blood and lysed using methanol-water (70:30, v/v) before cellular components were precipitated with acetonitrile and the supernatant further cleaned by weak anion exchange solid phase extraction. The method was found to be both precise and accurate and was successfully utilised to analyse F-RTP concentrations in patient samples collected as part of the AGILE CST-6 clinical trial.

Original languageEnglish
Article number116155
Pages (from-to)116155
JournalJournal of Pharmaceutical and Biomedical Analysis
Volume245
DOIs
Publication statusPublished - 21 Apr 2024

Keywords

  • Bioanalysis
  • COVID-19
  • Favipiravir RTP
  • SARS-CoV-2
  • T-705 RTP

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