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Synthesis, biological evaluation and molecular modeling studies of phenyl-/benzhydrylpiperazine derivatives as potential MAO inhibitors.

Abstract：

:Monoamine oxidase inhibitors (MAOIs) are potential drug candidates for the treatment of various neurological disorders like Parkinson's disease, Alzheimer's disease and depression. In the present study, two series of 4-substituted phenylpiperazine and 1-benzhydrylpiperazine (1-21) derivatives were synthesized and screened for their MAO-A and MAO-B inhibitory activity using Amplex Red assay. Most of the synthesized compounds were found selective for MAO-B isoform except compounds 3, 7, 8, 9 and 13 (MAO-A selective) while compound 11 was non-selective. In the current series, compound 12 showed most potent MAO-B inhibitor activity with IC50 value of 80 nM and compound 7 was found to be most potent MAO-A inhibitor with IC50 value of 120 nM and both the compounds were found reversible inhibitors. Compound 8 was found most selective MAO-A inhibitor while compound 20 was found most selective inhibitor for MAO-B isoform. In the cytotoxicity evaluation, all the compounds were found non-toxic to SH-SY5Y and IMR-32 cells at 25 µM concentration. In the ROS studies, compound 8 (MAO-A inhibitor) reduced the ROS level by 51.2% while compound 13 reduced the ROS level by 61.81%. In the molecular dynamic simulation studies for 30 ns, compound 12 was found quite stable in the active cavity of MAO-B. Thus, it can be concluded that phenyl- and 1-benzhydrylpiperazine derivatives are promising MAO inhibitors and can act as a lead to design potent, and selective MAO inhibitors for the treatment of various neurological disorders.

journal_name

Bioorg Chem

journal_title

Bioorganic chemistry

authors

Kumar B,Sheetal,Mantha AK,Kumar V

doi

10.1016/j.bioorg.2018.01.020

subject

Has Abstract

pub_date

2018-04-01 00:00:00

pages

252-262

eissn

0045-2068

issn

1090-2120

pii

S0045-2068(17)30778-2

journal_volume

77

pub_type

杂志文章

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