Discovery of Pyridone-Based Histone Deacetylase Inhibitors: Approaches for Metabolic Stability

Misun Cho, Eunhyun Choi, Jee Sun Yang, Chulho Lee, Jeong Jea Seo, Beom Seok Kim, Soo Jin Oh, Hwan Mook Kim, Kiho Lee, Song Kyu Park, Ho Jeong Kwon, Gyoonhee Han

Research output: Contribution to journalArticlepeer-review

21 Citations (Scopus)


Histone deacetylases (HDACs) are important enzymes in epigenetic regulation and are therapeutic targets for cancer. Most zinc-dependent HDACs induce proliferation, dedifferentiation, and anti-apoptotic effects in cancer cells. We designed and synthesized a new series of pyridone-based HDAC inhibitors that have a pyridone ring in the core structure and a conjugated system with an olefin connecting the hydroxamic acid moiety. Consequently, most of the selected pyridone-based HDAC inhibitors showed similar or higher inhibition profiles in addition to remarkable metabolic stability against hydrolysis relative to the corresponding lactam-based HDAC inhibitors. Furthermore, the selectivity of the novel pyridine-based compounds was evaluated across all of the HDAC isoforms. One of these compounds, (E)-N-hydroxy-3-{1-[3-(naphthalen-2-yl)propyl]-2-oxo-1,2-dihydropyridin-3-yl}acrylamide, exhibited the highest level of HDAC inhibition (IC50=0.07μM), highly selective inhibition of classI HDAC1 and classII HDAC6 enzymes, metabolic stability in mouse liver microsomal studies, and effective growth inhibition of various cancer cell lines. Docking studies indicated that a long alkyl linker and bulky hydrophobic cap groups affect invitro activities. Overall, the findings reported herein regarding pyridone-based HDAC inhibitors can be used to guide future research efforts to develop new and effective anticancer therapeutics.

Original languageEnglish
Pages (from-to)272-279
Number of pages8
Issue number2
Publication statusPublished - 2013 Feb

All Science Journal Classification (ASJC) codes

  • Biochemistry
  • Molecular Medicine
  • Pharmacology
  • Drug Discovery
  • Pharmacology, Toxicology and Pharmaceutics(all)
  • Organic Chemistry


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