Cited by 87Parkinson's Disease Mechanisms and TreatmentsAutophagy in Disease and TherapyNuclear Receptors and Signaling

Sestrin2 protects dopaminergic cells against rotenone toxicity through AMPK-Dependent autophagy activation

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Hou, Yi-Sheng, Guan, Jun-Jie, Xu, Hai-Dong, Wu, Feng, Sheng, Rui, Qin, Zheng-Hong·2015·Molecular and Cellular Biology

Abstract

Dysfunction of the autophagy-lysosomal pathway (ALP) and the ubiquitin-proteasome system (UPS) was thought to be an important pathogenic mechanism in synuclein pathology and Parkinson's disease (PD). In the present study, we investigated the role of sestrin2 in autophagic degradation of α-synuclein and preservation of cell viability in a rotenone-induced cellular model of PD. We speculated that AMP-activated protein kinase (AMPK) was involved in regulation of autophagy and protection of dopaminergic cells against rotenone toxicity by sestrin2. The results showed that both the mRNA and protein levels of sestrin2 were increased in a TP53-dependent manner in Mes 23.5 cells after treatment with rotenone. Genetic knockdown of sestrin2 compromised the autophagy induction in response to rotenone, while overexpression of sestrin2 increased the basal autophagy activity. Sestrin2 presumably enhanced autophagy in an AMPK-dependent fashion, as sestrin2 overexpression activated AMPK, and genetic knockdown of AMPK abrogated autophagy induction by rotenone. Restoration of AMPK activity by metformin after sestrin2 knockdown recovered the autophagy activity. Sestrin2 overexpression ameliorated α-synuclein accumulation, inhibited caspase 3 activation, and reduced the cytotoxicity of rotenone. These results suggest that sestrin2 upregulation attempts to maintain autophagy activity and suppress rotenone cytotoxicity through activation of AMPK, and that sestrin2 exerts a protective effect on dopaminergic cells.

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  • The same mechanism (sestrin-dependent autophagy/mTORC1 inhibition) is associated with the protective effect of sestrin2 in rodent dopaminergic neurons against rotenone toxicity.

    “The same mechanism has been associated with the protective effect of sestrin2 in rodent dopaminergic neurons against rotenone toxicity (Hou et al., 2015).”

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Authors
Hou, Y.-S., Guan, J.-J., Xu, H.-D., Wu, F., Sheng, R., & Qin, Z.-H.
Affiliations
  • Soochow University (CN)
  • Department of Pharmacology and Laboratory of Aging and Nervous Diseases, Jiangsu Key Laboratory of Translational Research and Therapy for Neuro-Psycho-Diseases, College of Pharmaceutical Science, Soochow University, Suzhou, China
Venue
Molecular and Cellular Biology
Published
2015-08-01
Volume
35
Issue
16
Pages
2740-2751
ISSN
  • 0270-7306 (ISSN-L)
  • 1098-5549
OpenAlex
W1831319365
Cited by
87
References
72
Citations by year
2026: 1 · 2025: 5 · 2024: 4 · 2023: 9 · 2022: 6 · 2021: 9 · 2020: 11 · 2019: 14 · 2018: 9 · 2017: 9 · 2016: 8 · 2015: 2
FWCI
6.55
Type
journal article
Language
en
Open access
Locations
  • Molecular and Cellular Biology (publishedVersion)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Health Sciences › Medicine › Neurology › Parkinson's Disease Mechanisms and Treatments
  • Health Sciences › Medicine › Epidemiology › Autophagy in Disease and Therapy
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Nuclear Receptors and Signaling
Keywords
Sestrin2, rotenone toxicity, dopaminergic neurons, AMPK, autophagy, alpha-synuclein, Parkinson's disease, TP53, metformin, caspase-3, neuroprotection, autophagy-lysosome pathway
MeSH terms
Sestrins, Animals, Autophagy, Cell Line, Nuclear Proteins, Parkinson Disease, Secondary, Rotenone, Uncoupling Agents, Transcriptional Activation, Up-Regulation, Rats, alpha-Synuclein, Caspase 3, AMP-Activated Protein Kinases, Dopaminergic Neurons

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