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2018 ; 6
(ä): e4756
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A strategy to find novel candidate anti-Alzheimer s disease drugs by constructing
interaction networks between drug targets and natural compounds in medical
plants
#MMPMID29770277
Chen BW
; Li WX
; Wang GH
; Li GH
; Liu JQ
; Zheng JJ
; Wang Q
; Li HJ
; Dai SX
; Huang JF
PeerJ
2018[]; 6
(ä): e4756
PMID29770277
show ga
BACKGROUND: Alzheimer' disease (AD) is an ultimately fatal degenerative brain
disorder that has an increasingly large burden on health and social care systems.
There are only five drugs for AD on the market, and no new effective medicines
have been discovered for many years. Chinese medicinal plants have been used to
treat diseases for thousands of years, and screening herbal remedies is a way to
develop new drugs. METHODS: We used molecular docking to screen 30,438 compounds
from Traditional Chinese Medicine (TCM) against a comprehensive list of AD target
proteins. TCM compounds in the top 0.5% of binding affinity scores for each
target protein were selected as our research objects. Structural similarities
between existing drugs from DrugBank database and selected TCM compounds as well
as the druggability of our candidate compounds were studied. Finally, we searched
the CNKI database to obtain studies on anti-AD Chinese plants from 2007 to 2017,
and only clinical studies were included. RESULTS: A total of 1,476 compounds (top
0.5%) were selected as drug candidates. Most of these compounds are abundantly
found in plants used for treating AD in China, especially the plants from two
genera Panax and Morus. We classified the compounds by single target and multiple
targets and analyzed the interactions between target proteins and compounds.
Analysis of structural similarity revealed that 17 candidate anti-AD compounds
were structurally identical to 14 existing approved drugs. Most of them have been
reported to have a positive effect in AD. After filtering for compound
druggability, we identified 11 anti-AD compounds with favorable properties, seven
of which are found in anti-AD Chinese plants. Of 11 anti-AD compounds, four
compounds 5,862, 5,863, 5,868, 5,869 have anti-inflammatory activity. The
compound 28,814 mainly has immunoregulatory activity. The other six compounds
have not yet been reported for any biology activity at present. DISCUSSION:
Natural compounds from TCM provide a broad prospect for the screening of anti-AD
drugs. In this work, we established networks to systematically study the
connections among natural compounds, approved drugs, TCM plants and AD target
proteins with the goal of identifying promising drug candidates. We hope that our
study will facilitate in-depth research for the treatment of AD in Chinese
medicine.