Zhao LX, Wang Y, Liu T, Wang YX, Chen HZ, Xu JR, Qiu Y. α-Mangostin decreases β-amyloid peptides production via modulation of amyloidogenic pathway.
CNS Neurosci Ther 2017;
23:526-534. [PMID:
28429536 DOI:
10.1111/cns.12699]
[Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2016] [Revised: 03/17/2017] [Accepted: 03/19/2017] [Indexed: 12/13/2022] Open
Abstract
AIMS
β-amyloid (Aβ) aggregation and deposition play a central role in the pathogenic process of Alzheimer's disease (AD). α-Mangostin (α-M), a polyphenolic xanthone, have been shown to dissociate Aβ oligomers. In this study, we further investigated the effect of α-M on Aβ production and its molecular mechanism.
METHODS
The Aβ and soluble amyloid precursor protein α (sAPPα) in culture medium of cortical neurons were measured by ELISA. The activities of α-, β-, and γ-secretases were assayed, and the interaction between α-M and β- or γ-secretases was simulated by molecular docking.
RESULTS
α-M significantly decreased Aβ40 and Aβ42 production. α-M did not affect the expression of enzymes involved in nonamyloidogenic and amyloidogenic pathways, but significantly decreased the activities of β-secretase and likely γ-secretase with IC50 13.22 nmol·L-1 and 16.98 nmol·L-1 , respectively. Molecular docking demonstrated that α-M interacted with β-site amyloid precursor protein cleaving enzyme 1 and presenilin 1 to interfere with their active sites.
CONCLUSIONS
Our data demonstrate that α-M decreases Aβ production through inhibiting activities of β-secretase and likely γ-secretase in the amyloidogenic pathway. The current data together with previous study indicated that α-M could be a novel neuroprotective agent through intervention of multiple pathological processes of AD.
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