Calycosin and 8-O-methylretusin isolated from Maackia amurensis as potent and selective reversible inhibitors of human monoamine oxidase-B

Cited 35 time in scopus
Metadata Downloads
Title
Calycosin and 8-O-methylretusin isolated from Maackia amurensis as potent and selective reversible inhibitors of human monoamine oxidase-B
Author(s)
J M Oh; Hyun Jae Jang; Won Jun Kim; M G Kang; S C Baek; J P Lee; D Park; Sei-Ryang Oh; H Kim
Bibliographic Citation
International Journal of Biological Macromolecules, vol. 151, pp. 441-448
Publication Year
2020
Abstract
Nineteen compounds were isolated from the stems of Maackia amurensis by activity-guided screening for new human monoamine oxidase-B (hMAO-B) inhibitors. Among the compounds isolated, flavonoids calycosin (5) and 8-O-methylretusin (6) were found to potently and selectively inhibit hMAO-B (IC50 = 0.24 and 0.23 μM, respectively) but not hMAO-A with high selectivity index (SI) values (SI = 293.8 and 81.3, respectively). In addition, 5 and 6 reversibly and competitively inhibited hMAO-B with Ki values of 0.057 and 0.054 μM, respectively. A pterocarpan (-)-medicarpin (18) was also observed to strongly inhibit hMAO-B (IC50 = 0.30 μM). Most of the compounds weakly inhibited AChE, except isolupalbigenin (13) (IC50 = 20.6 μM), which suggested 13 be considered a potential dual function inhibitor of MAO-B and AChE. Molecular docking simulation revealed that the binding affinities of 5 and 6 for hMAO-B (both -9.3 kcal/mol) were higher than those for hMAO-A (-7.4 and -7.2 kcal/mol, respectively). Compound 5 was found to interact by hydrogen bonding with hMAO-B at Cys172 residue (distance: 3.250 A); no hydrogen bonding was predicted between 5 and hMAO-A. These findings suggest that compounds 5 and 6 be considered novel potent, selective, and reversible hMAO-B inhibitors and candidates for the treatment of neurological disorders.
Keyword
8-O-MethylretusinCalycosinDocking simulationMaackia amurensisSelective human monoamine oxidase-B inhibitor
ISSN
0141-8130
Publisher
Elsevier
DOI
http://dx.doi.org/10.1016/j.ijbiomac.2020.02.144
Type
Article
Appears in Collections:
Ochang Branch Institute > Division of National Bio-Infrastructure > Bio-Resource Central Bank > 1. Journal Articles
Ochang Branch Institute > 1. Journal Articles
Files in This Item:
  • There are no files associated with this item.


Items in OpenAccess@KRIBB are protected by copyright, with all rights reserved, unless otherwise indicated.