2. Academic Validation
  3. Development of substituted benzimidazoles as inhibitors of human aldehyde dehydrogenase 1A isoenzymes

Development of substituted benzimidazoles as inhibitors of human aldehyde dehydrogenase 1A isoenzymes

  • Chem Biol Interact. 2024 Mar 1:391:110910. doi: 10.1016/j.cbi.2024.110910.
Cyrus Takahashi 1,  Mikhail Chtcherbinine 1,  Brandt C Huddle 2,  Michael W Wilson 2,  Timothy Emmel 2,  Robert M Hohlman 2,  Stacy McGonigal 3,  Ronald J Buckanovich 4,  Scott D Larsen 2,  Thomas D Hurley 5
Affiliations

Affiliations

  • 1 Department of Biochemistry and Molecular Biology, Indiana University School of Medicine, Indianapolis, IN, 46202, USA.
  • 2 Department of Medicinal Chemistry, College of Pharmacy, University of Michigan, Ann Arbor, MI, 48109, USA.
  • 3 Department of Obstetrics, Gynecology, and Reproductive Sciences, the Magee-Women's Research Institute, Pittsburgh, PA 15213, USA.
  • 4 Department of Obstetrics, Gynecology, and Reproductive Sciences, the Magee-Women's Research Institute, Pittsburgh, PA 15213, USA; Division of Hematology-Oncology, Departments of Internal Medicine and Obstetrics, Gynecology, and Reproductive Sciences, University of Pittsburgh Medical Center and the Magee-Women's Research Institute, Pittsburgh, PA, 15213, USA.
  • 5 Department of Biochemistry and Molecular Biology, Indiana University School of Medicine, Indianapolis, IN, 46202, USA. Electronic address: thurley@iu.edu.
PMID: 38364885 DOI: 10.1016/j.cbi.2024.110910
Abstract

Aldehyde dehydrogenase 1A (ALDH1A) isoforms may be a useful target for overcoming chemotherapy resistance in high-grade serous ovarian Cancer (HGSOC) and other solid tumor cancers. However, as different cancers express different ALDH1A isoforms, isoform selective inhibitors may have a limited therapeutic scope. Furthermore, resistance to an ALDH1A isoform selective inhibitor could arise via induction of expression of other ALDH1A isoforms. As such, we have focused on the development of pan-ALDH1A inhibitors, rather than on ALDH1A isoform selective compounds. Herein, we report the development of a new group of pan-ALDH1A inhibitors to assess whether broad spectrum ALDH1A inhibition is an effective adjunct to chemotherapy in HGSOC. Optimization of the CM10 scaffold, aided by ALDH1A1 crystal structures, led to improved biochemical potencies, improved cellular efficacy as demonstrated by reduction in ALDEFLUOR signal in HGSOC cells, and substantial improvements in liver microsomal stability. Based on this work we identified two compounds 17 and 25 suitable for future in vivo proof of concept experiments.

Keywords

Aldehyde dehydrogenase; Inhibitor development; X-ray crystallography.

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