6-benzothiazolyl ureas, thioureas and guanidines are potent inhibitors of ABAD/17β-HSD10 and potential drugs for Alzheimer's disease treatment: design, synthesis and in vitro evaluation

Ondrej Benek, Lukas Hroch, Laura Aitken, Rafael Dolezal, Patrick Guest, Marketa Benkova, Ondrej Soukup, Karel Musil, Rebecca Hughes, Kamil Kuca, Terry K. Smith, Frank Gunn-Moore, Kamil Musilek

Research output: Contribution to journalArticlepeer-review

22 Citations (Scopus)
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Abstract

Background: The mitochondrial enzyme amyloid beta-binding alcohol dehydrogenase (ABAD) also known as 17β-hydroxysteroid dehydrogenase type 10 (17β-HSD10) has been connected with the pathogenesis of Alzheimer’s disease (AD). ABAD/ 17β-HSD10 is a binding site for the amyloid-beta peptide (Aβ) inside the mitochondrial matrix where it exacerbates Aβ toxicity. Interaction between these two proteins triggers a series of events leading to mitochondrial dysfunction as seen in AD.
Methods: As ABAD’s enzymatic activity is required for mediating Aβ toxicity, its inhibition presents a promising strategy for AD treatment. In this study, a series of new benzothiazolylurea analogues have been prepared and evaluated in vitro for their potency to inhibit ABAD/ 17β-HSD10 enzymatic activity. The most potent compounds have also been tested for their cytotoxic properties and their ability to permeate through blood-brain barrier has been predicted. To explain the structure-activity relationship QSAR and pharmacophore studies have been performed.
Results and Conclusions: Compound 12 was identified being the most promising hit compound with good inhibitory activity (IC50 = 3.06 ± 0.40µM) and acceptable cytotoxicity profile comparable to the parent compound of frentizole. The satisfactory physical-chemical properties suggesting its capability to permeate through BBB make compound 12 a novel lead structure for further development and biological assessment.
Original languageEnglish
Pages (from-to)345-358
Number of pages14
JournalMedicinal Chemistry
Volume13
Issue number4
Early online date9 Jan 2017
DOIs
Publication statusPublished - Jun 2017

Keywords

  • Alzheimer's disease
  • Amyloid-beta binding alcohol dehydrogenase (ABAD)
  • 17β-hydroxysteroid dehydrogenase type 10 (17β-HSD10)
  • Chemical synthesis
  • Enzyme inhibition
  • Frentizole
  • QSAR
  • Pharmacophore modelling

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