Selective inhibition of monoamine oxidase A by hispidol.

Abstract:

:Hispidol, an aurone, isolated from Glycine max Merrill, was found to potently and selectively inhibit an isoform of recombinant human monoamine oxidase-A (MAO-A), with an IC50 value of 0.26 µM, and to inhibit MAO-B, but with lower potency (IC50 = 2.45 µM). Hispidol reversibly and competitively inhibited MAO-A with a Ki value of 0.10 µM with a potency much greater than toloxatone (IC50 = 1.10 µM), a marketed drug. It also reversibly and competitively inhibited MAO-B (Ki = 0.51 µM). Sulfuretin, an analog of hispidol, effectively inhibited MAO-A (IC50 = 4.16 µM) but not MAO-B (IC50 > 80 µM). A comparison of their chemical structures showed that the 3'-hydroxyl group of sulfuretin might reduce its inhibitory activities against MAO-A and MAO-B. Flexible docking simulation revealed that the binding affinity of hispidol for MAO-A (-9.1 kcal/mol) was greater than its affinity for MAO-B (-8.7 kcal/mol). The docking simulation showed hispidol binds to the major pocket of MAO-A or MAO-B. The findings suggest hispidol is a potent, selective, reversible inhibitor of MAO-A, and that it be considered a novel lead compound for development of novel reversible inhibitors of MAO-A.

journal_name

Bioorg Med Chem Lett

authors

Baek SC,Lee HW,Ryu HW,Kang MG,Park D,Kim SH,Cho ML,Oh SR,Kim H

doi

10.1016/j.bmcl.2018.01.049

subject

Has Abstract

pub_date

2018-02-15 00:00:00

pages

584-588

issue

4

eissn

0960-894X

issn

1464-3405

pii

S0960-894X(18)30062-3

journal_volume

28

pub_type

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