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Published in: Metabolic Brain Disease 1/2019

Open Access 01-02-2019 | Original Article

Echinacoside protects against MPTP/MPP+-induced neurotoxicity via regulating autophagy pathway mediated by Sirt1

Authors: Chang Chen, Baomei Xia, Lili Tang, Wei Wu, Juanjuan Tang, Yan Liang, Hui Yang, Zhennian Zhang, Yan Lu, Gang Chen, Ye Yang, Yang Zhao

Published in: Metabolic Brain Disease | Issue 1/2019

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Abstract

Parkinson’s disease (PD) is a common chronic neurodegenerative disease and greatly affects the quality of PD patients’ life. Current symptomatic treatment of PD is limited. There are no effective treatment and drugs that could radically cure PD. Increasing experimental evidence has proven a causal relationship between alpha-synuclein (α-synuclein, α-syn) and the neuropathology of Parkinson’s diseases, although the exact pathophysiological role of α-synuclein is not fully clarified. Previous studies showed that monomers and polymers of α-synuclein were secreted from damaged nerve cells via exocytosis and occupied healthy nerve cells via endocytosis, which afford evidence for the prion-like role of α-synuclein. Autophagy is the known mechanism for eukaryotic cells to degrade protein polymers and damaged organelles that proteasome does not cope with. Therefore, promoting the clearance of α-synuclein by enhancing autophagy in neuronal cells could be a promising treatment in the early stage of PD. SIRT1 is a potent regulator of autophagy, because it deacetylates a mass of important transcription factors such as Forkhead Box subgroup O (FoxO) transcription factors family. SIRT1’s action relates to FoxO, because FoxO transcription factors are involved in various molecular pathways underlying neuronal protection and autophagy. Moreover, Sirt1 deacetylates proautophagic proteins such as Atg5, Atg7, and Atg8. Echinacoside (ECH) is the main active ingredient of a widely used Chinese herb cistanche, which has been proven to elicit neuroprotective effects in models of neurodegenerative diseases. In this study, we found that ECH could improve PD-like symptoms in MPTP-lesioned mouse model. We further showed that the underlying mechanism of the action of ECH was associated with enhancing autophagy in neurons via bind to Sirt1 directly and affect FoxO expression. Our study demonstrated ECH as a potential therapeutic agent against PD.
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Metadata
Title
Echinacoside protects against MPTP/MPP+-induced neurotoxicity via regulating autophagy pathway mediated by Sirt1
Authors
Chang Chen
Baomei Xia
Lili Tang
Wei Wu
Juanjuan Tang
Yan Liang
Hui Yang
Zhennian Zhang
Yan Lu
Gang Chen
Ye Yang
Yang Zhao
Publication date
01-02-2019
Publisher
Springer US
Published in
Metabolic Brain Disease / Issue 1/2019
Print ISSN: 0885-7490
Electronic ISSN: 1573-7365
DOI
https://doi.org/10.1007/s11011-018-0330-3

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