Mouse pharmacokinetics and metabolism of the curcumin analog, 4-piperidinone,3,5-bis[(2-fluorophenyl)methylene]-acetate(3E,5E) (EF-24; NSC 716993)

Joel M Reid, Sarah A. Buhrow, Judith A. Gilbert, Lee Jia, Mamoru Shoji, James P. Snyder, Matthew M. Ames

Research output: Contribution to journalArticle

14 Scopus citations


Purpose: Curcumin, a keto-enol constituent of turmeric, has in vitro and in vivo antitumor activity. However, in vivo potency is low due to poor oral absorption. The mono-carbonyl analog, 3,5-bis[(2-fluorophenyl)methylene]-4- piperidinone acetate (EF-24, NSC 716993), exhibited broad-spectrum activity in the NCI anticancer cell line screen and potent antiangiogenesis activity in a HUVEC cell migration assay. The purpose of this study was to characterize the preclinical pharmacology of EF-24 in mice. Methods: EF-24 plasma stability, protein binding, pharmacokinetics, and metabolism were characterized utilizing an LC/MS/MS assay. Results: An LC/MS/MS assay incorporated protein precipitation with methanol, reverse-phase HPLC separation under gradient elution using an aqueous methanol mobile phase containing 0.1 % formic acid, and positive electrospray ionization detection of the m/z 312 > 149 transition for EF-24. The assay was linear over the range 7.8-1,000 nM. Plasma protein binding was >98 % with preferential binding to albumin. EF-24 plasma disposition in mice after i.v. administration of a 10 mg/kg dose was best fit to a 3-compartment open model. The terminal elimination half-life and plasma clearance values were 73.6 min and 0.482 L/min/kg, respectively. EF-24 bioavailability was 60 and 35 % after oral and i.p. administration, respectively. NADPH-dependent metabolism of EF-24 loss in liver microsomal preparations yielded several metabolites consistent with EF-24 hydroxylation and reduction.

Original languageEnglish (US)
Pages (from-to)1137-1146
Number of pages10
JournalCancer Chemotherapy and Pharmacology
Issue number6
StatePublished - 2014



  • Curcumin
  • EF-24
  • LC/MS/MS
  • Mouse
  • Pharmacokinetics

ASJC Scopus subject areas

  • Cancer Research
  • Oncology
  • Pharmacology
  • Pharmacology (medical)
  • Toxicology

Cite this