Cited by 76Parkinson's Disease Mechanisms and TreatmentsNuclear Receptors and SignalingNeurological disorders and treatments

GSK-3β Contributes to Parkinsonian Dopaminergic Neuron Death: Evidence From Conditional Knockout Mice and Tideglusib

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Li, Junyu, Ma, Shanshan, Chen, Jingnan, Hu, Kunhua, Li, Yongyi, Zhang, Zeyu, Su, Zixiang, Woodgett, James R. +2 more·2020·Frontiers in Molecular Neuroscience

Abstract

Glycogen synthase kinase-3 (GSK-3) dysregulation has been implicated in nigral dopaminergic neurodegeneration, one of the main pathological features of Parkinson’s disease (PD). The two isoforms, GSK-3α and GSK-3β, have both been suggested to play a detrimental role in neuronal death. To date, several studies have focused on the role of GSK-3β on PD pathogenesis, while the role of GSK-3α has been largely overlooked. Here, we report in situ observations that both GSK-3α and GSK-3β are dephosphorylated at a negatively acting regulatory serine, indicating kinase activation, selectively in nigral dopaminergic neurons following exposure of mice to 1-methyl-4-pheny-1,2,3,6-tetrahydropyridine (MPTP). To identify whether GSK-3α and GSK-3β display functional redundancy in regulating parkinsonian dopaminergic cell death, we analysed dopaminergic neuron-specific Gsk3a null (Gsk3a△Dat) and Gsk3b null (Gsk3b△Dat) mice, respectively. We found that Gsk3b△Dat, but not Gsk3a△Dat, showed significant resistance to MPTP insult, revealing non-redundancy of GSK-3α and GSK-3β in PD pathogenesis. In addition, we tested the neuroprotective effect of tideglusib, the most clinically advanced inhibitor of GSK-3, in the MPTP model of PD. Administration of higher doses (200 mg/kg and 500 mg/kg) of tideglusib exhibited significant neuroprotection, whereas 50 mg/kg tideglusib failed to prevent dopaminergic neurodegeneration from MPTP toxicity. Administration of 200 mg/kg tideglusib improved motor symptoms of MPTP-treated mice. Together, these data demonstrate GSK-3β and not GSK-3α is critical for parkinsonian neurodegeneration. Our data support the view that GSK-3β acts as a potential therapeutic target in PD and tideglusib would be a candidate drug for PD neuroprotective therapy.

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Crossref · 10.3389/fnmol.2020.00081

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  • The beneficial effect of FMT on neuroinflammation is ascribed to GM modulating microglia and astrocyte activation in SN by regulating the TLR4/NF-κB pathway and reducing expression of GSK3β, iNOS and IL-1β.

    “This beneficial effect should be ascribed to the ability of GM to modulate microglia and astrocyte activation in SN by regulating the TLR4/NF-κB pro-inflammatory pathway and reducing the expression of GSK3β, iNOS and IL-1β, which are implicated in PD pathogenesis and progression [469,470,471,472,478,479,480].”

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Authors
Li, J., Ma, S., Chen, J., Hu, K., Li, Y., Zhang, Z., Su, Z., Woodgett, J. R., Li, M., & Huang, Q.
Affiliations
  • Sun Yat-sen University (CN)
  • Lunenfeld-Tanenbaum Research Institute (CA)
Corresponding author
  • Li, Mingtao
  • Huang, Qiaoying
Venue
Frontiers in Molecular Neuroscience
Published
2020-06-03
Volume
13
Pages
81-81
ISSN
1662-5099 (ISSN-L)
OpenAlex
W3033352229
Cited by
76
References
83
Citations by year
2026: 11 · 2025: 17 · 2024: 15 · 2023: 12 · 2022: 15 · 2021: 6
FWCI
3.57
Type
journal article
Language
en
Open access
Locations
  • Frontiers in Molecular Neuroscience (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Funders
  • National Natural Science Foundation of China (U180168, 81771368, 81771368, 81601104)
  • Natural Science Foundation of Guangdong Province (2017A030313507, 2017A030313862)
  • Guangzhou Municipal Science and Technology Project (201704020066, 201804020008, 201803040020)
  • Canadian Institutes of Health Research
Topics
  • Health Sciences › Medicine › Neurology › Parkinson's Disease Mechanisms and Treatments
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Nuclear Receptors and Signaling
  • Health Sciences › Medicine › Neurology › Neurological disorders and treatments
Keywords
GSK3β, GSK3α, Parkinson's disease, dopaminergic neuron death, substantia nigra, MPTP, tideglusib, GSK-3 inhibitors, conditional knockout mice, kinase dephosphorylation, functional redundancy, neuroprotection, motor symptoms

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