Prodrugs of a 1-Hydroxy-2-oxopiperidin-3-yl Phosphonate Enolase Inhibitor for the Treatment of ENO1-Deleted Cancers

Victoria C. Yan, Cong Dat Pham, Elliot S. Ballato, Kristine L. Yang, Kenisha Arthur, Sunada Khadka, Yasaman Barekatain, Prakriti Shrestha, Theresa Tran, Anton H. Poral, Mykia Washington, Sudhir Raghavan, Barbara Czako, Federica Pisaneschi, Yu Hsi Lin, Nikunj Satani, Naima Hammoudi, Jeffrey J. Ackroyd, Dimitra K. Georgiou, Steven W. MillwardFlorian L. Muller

Research output: Contribution to journalArticlepeer-review

4 Scopus citations


Cancers harboring homozygous deletion of the glycolytic enzyme enolase 1 (ENO1) are selectively vulnerable to inhibition of the paralogous isoform, enolase 2 (ENO2). A previous work described the sustained tumor regression activities of a substrate-competitive phosphonate inhibitor of ENO2, 1-hydroxy-2-oxopiperidin-3-yl phosphonate (HEX) (5), and its bis-pivaloyoxymethyl prodrug, POMHEX (6), in an ENO1-deleted intracranial orthotopic xenograft model of glioblastoma [Nature Metabolism 2020, 2, 1423-1426]. Due to poor pharmacokinetics of bis-ester prodrugs, this study was undertaken to identify potential non-esterase prodrugs for further development. Whereas phosphonoamidate esters were efficiently bioactivated in ENO1-deleted glioma cells, McGuigan prodrugs were not. Other strategies, including cycloSal and lipid prodrugs of 5, exhibited low micromolar IC50values in ENO1-deleted glioma cells and improved stability in human serum over 6. The activity of select prodrugs was also probed using the NCI-60 cell line screen, supporting its use to examine the relationship between prodrugs and cell line-dependent bioactivation.

Original languageEnglish (US)
Pages (from-to)13813-13832
Number of pages20
JournalJournal of Medicinal Chemistry
Issue number20
StatePublished - Oct 27 2022

ASJC Scopus subject areas

  • Molecular Medicine
  • Drug Discovery


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