Abstract

INTRODUCTION: Niraparib (Zejula™) is a poly(ADP-ribose) polymerase inhibitor recently approved by the US Food and Drug Administration for the maintenance treatment of patients with recurrent platinum-sensitive epithelial ovarian, fallopian tube, or primary peritoneal cancer who are in a complete or partial response to platinum-based chemotherapy. The pivotal phase III clinical trial has shown improved progression-free survival in patients receiving niraparib compared with those receiving placebo.

PURPOSE: Since niraparib is administered orally, it is of interest to investigate the oral bioavailability (Fpo) of this novel compound, which is the aim of this study.

METHODS: Six patients received an oral therapeutic dose of 300 mg niraparib, followed by a 15-min intravenous infusion of 100 µg14C-niraparib with a radioactivity of approximately 100 nCi. The niraparib therapeutic dose was measured in plasma using a validated liquid chromatography-tandem mass spectrometry method, whereas the total14C-radioactivity and14C-niraparib plasma levels were measured by accelerator mass spectrometry and a validated high performance liquid chromatography assay with AMS.

RESULTS: The Fpoof niraparib was determined to be 72.7% in humans.

Original languageEnglish
Pages (from-to)39-46
Number of pages8
JournalCancer Chemotherapy and Pharmacology
Volume81
Issue number1
Early online date17 Oct 2017
DOIs
Publication statusPublished - Jan 2018

Keywords

  • Niraparib
  • Bioavailability
  • AMS
  • LC-MS/MS
  • Pharmacokinetics
  • 14C-microtracer

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