The Anti-Amyloid-β and Neuroprotective Properties of a Novel Tricyclic Pyrone Molecule

Izumi Maezawa, Bende Zou, Jacopo Di Lucente, William S. Cao, Conrado Pascual, Sahani Weerasekara, Man Zhang, Xinmin Simon Xie, Duy H. Hua, Lee-Way Jin

Research output: Contribution to journalArticle

6 Scopus citations

Abstract

There is an urgent unmet need for new therapeutics for Alzheimer's disease (AD), the most common cause of dementia in the elderly. Therapeutic approaches targeting amyloid-β (Aβ) and its downstream toxicities have become major strategies in AD drug development. We have taken a rational design approach and synthesized a class of tricyclic pyrone (TP) compounds that show anti-Aβ and other neuroprotective actions. The in vivo efficacy of a lead TP named CP2 to ameliorate AD-like pathologies has been shown in mouse models. Here we report the selection and initial characterization of a new lead TP70, which exhibited an anti-Aβ therapeutic index even higher than CP2. Moreover, TP70 was able to reduce oxidative stress, inhibit acyl-coenzyme A:cholesterol acyltransferase (ACAT), and upregulate the expression of ATP-binding cassette subfamily A, member 1 (ABCA1), actions considered neuroprotective in AD. TP70 further showed excellent pharmacokinetic properties, including brain penetration and oral availability. When administered to 5xFAD mice via intraperitoneal or oral route, TP70 enhanced the overall solubility and decreased the level of cerebral Aβ, including both fibrillary and soluble Aβ species. Interestingly, TP70 enhanced N-methyl-D-aspartate (NMDA) receptor-mediated excitatory post-synaptic potential (EPSP) in the hippocampal CA1 area, increased the magnitude of NMDA-dependent hippocampal long-term potentiation (LTP), a cellular model of learning and memory, and prevented the Aβ oligomer-impaired LTP. Significantly, a single dose of TP70 administered to aged 5xFAD mice was effective in mitigating the impaired LTP induction, recorded at 24 h after administration. Our results support a potential of TP70 in clinical development for AD in view of its synergistic neuroprotective actions, ability to positively modulate NMDA receptor-mediated hippocampal plasticity, and favorable pharmacokinetic properties in rodents.

Original languageEnglish (US)
Pages (from-to)559-574
Number of pages16
JournalJournal of Alzheimer's Disease
Volume58
Issue number2
DOIs
StatePublished - 2017

Keywords

  • Alzheimer's disease
  • amyloid
  • hippocampus
  • neuroprotection
  • neurotoxicity
  • NMDA

ASJC Scopus subject areas

  • Clinical Psychology
  • Geriatrics and Gerontology
  • Psychiatry and Mental health

Fingerprint Dive into the research topics of 'The Anti-Amyloid-β and Neuroprotective Properties of a Novel Tricyclic Pyrone Molecule'. Together they form a unique fingerprint.

  • Cite this

    Maezawa, I., Zou, B., Di Lucente, J., Cao, W. S., Pascual, C., Weerasekara, S., Zhang, M., Xie, X. S., Hua, D. H., & Jin, L-W. (2017). The Anti-Amyloid-β and Neuroprotective Properties of a Novel Tricyclic Pyrone Molecule. Journal of Alzheimer's Disease, 58(2), 559-574. https://doi.org/10.3233/JAD-161175