Synthesis, in vitro assay, and molecular modeling of new piperidine derivatives having dual inhibitory potency against acetylcholinesterase and Abeta1-42 aggregation for Alzheimer's disease therapeutics.
With the goal of developing Alzheimer's disease therapeutics, we have designed and synthesized new piperidine derivatives having dual action of acetylcholinesterase (AChE) and beta-amyloid peptide (Abeta) aggregation inhibition. For binding with the catalytic site of AChE, an ester with aromatic group was designed, and for the peripheral site, another aromatic group was considered. And for intercalating amyloid-beta oligomerization, long and linear conformation with a lipophilic group was considered. The synthetic methods employed for the structure with dual action depended on alcohols with an aromatic ring and the substituted benzoic acids, which are esterificated in the last step of the synthetic pathway. We screened these new derivatives through inhibition tests of acetylcholinesterase, butyrylcholinesterase (BChE), and Abeta(1-42) peptide aggregation, AChE-induced Abeta(1-42) aggregation. Our results displayed that compound 12 showed the best inhibitory potency and selectivity of AChE, and 29 showed the highest selectivity of BChE inhibition. Compounds 15 and 12 had inhibitory activities against Abeta(1-42) aggregation and AChE-induced Abeta aggregation. In the docking model, we confirmed that 4-chlorobenzene of 12 plays the parallel pi-pi stacking against the indole ring of Trp84 in the bottom gorge of AChE. Because the benzyhydryl moiety of 12 covered the peripheral site of AChE in a funnel-like shape, 12 showed good inhibitory potency against AChE and could inhibit AChE-induced Abeta(1-42) peptide aggregation.
Kwon
Young Ee
YE
College of Pharmacy, Woosuk University, Jeonbuk, Republic of Korea. yekwon@woosuk.ac.kr
Park
Jung Youl
JY
No
Kyung Tai
KT
Shin
Jae Hong
JH
Lee
Sung Kwang
SK
Eun
Jae Soon
JS
Yang
Jae Heon
JH
Shin
Tae Yong
TY
Kim
Dae Keun
DK
Chae
Byung Sook
BS
Leem
Jae-Yoon
JY
Kim
Kuk Hwan
KH
D000110:Acetylcholinesterase / Q000378:metabolism*; D000544:Alzheimer Disease / Q000188:drug therapy / Q000378:metabolism*; D016229:Amyloid beta-Peptides / Q000037:antagonists & inhibitors* / Q000378:metabolism; D002091:Butyrylcholinesterase / Q000378:metabolism; D002460:Cell Line; D002470:Cell Survival / Q000187:drug effects; D002800:Cholinesterase Inhibitors / Q000138:chemical synthesis* / Q000737:chemistry / Q000494:pharmacology*; D000077265:Donepezil; D006801:Humans; D007189:Indans / Q000138:chemical synthesis / Q000737:chemistry / Q000493:pharmacokinetics; D008958:Models, Molecular; D015394:Molecular Structure; D010446:Peptide Fragments / Q000037:antagonists & inhibitors* / Q000378:metabolism; D010880:Piperidines / Q000138:chemical synthesis / Q000737:chemistry* / Q000493:pharmacokinetics / Q000494:pharmacology*; D017434:Protein Structure, Tertiary; D013329:Structure-Activity Relationship
D016229:Amyloid beta-Peptides; D002800:Cholinesterase Inhibitors; D007189:Indans; D010446:Peptide Fragments; D010880:Piperidines; C075222:amyloid beta-protein (1-42); C032727:piperidine; D000077265:Donepezil; D000110:Acetylcholinesterase; D002091:Butyrylcholinesterase