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Design, Synthesis, and Bio-Evaluation of New Isoindoline-1,3-Dione Derivatives As Possible Inhibitors of Acetylcholinesterase Publisher



Hassanzadeh M1 ; Hassanzadeh F1 ; Khodarahmi GA1 ; Rostami M1 ; Azimi F1 ; Nadri H2 ; Homayouni Moghadam F3
Authors
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Authors Affiliations
  1. 1. Department of Medicinal Chemistry and Isfahan Pharmaceutical Science Research Center, School of Pharmacy and Pharmaceutical Science, Isfahan University of Medical Science, Isfahan, Iran
  2. 2. Department of Medicinal Chemistry, Faculty of Pharmacy, Shahid Sadoughi University of Medical Sciences, Yazd, Iran
  3. 3. Department of Animal Biotechnology, Cell Science Research Center, Royan Institute for Biotechnology, ACECR, Isfahan, Iran

Source: Research in Pharmaceutical Sciences Published:2021


Abstract

Background and purpose: Alzheimer's disease is considered one of the lead causes of elderly death around the world. A significant decrease in acetylcholine level in the brain is common in most patients with Alzheimer's disease, therefore acetylcholinesterase (AChE) inhibitors such as donepezil and rivastigmine are widely used for patients with limited therapeutic results and major side effects. Experimental approach: A series of isoindoline-1,3-dione -N-benzyl pyridinium hybrids were designed, synthesized and evaluated as anti-Alzheimer agents with cholinesterase inhibitory activities. The structure of the compounds were confirmed by various methods of analysis such as HNMR, CNMR, and FT-IR. Molecular modeling studies were also performed to identify the possible interactions between neprilysin and synthesized compounds. Findings/Results: The biological screening results indicated that all synthesized compounds displayed potent inhibitory activity with IC50values ranging from 2.1 to 7.4 μM. Among synthesized compounds, para-fluoro substituted compounds 7a and 7f exhibited the highest inhibitory potency against AChE (IC50= 2.1 μM). Molecular modeling studies indicated that the most potent compounds were able to interact with both catalytic and peripheral active sites of the enzyme. Also, some of the most potent compounds (7a, 7c, and 7f) demonstrated a neuroprotective effect against H2O2-induced cell death in PC12 neurons. Conclusion and implications: The synthesized compounds demonstrated moderate to good AChE inhibitory effect with results higher than rivastigmine. © 2021 Wolters Kluwer Medknow Publications. All rights reserved.
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