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Exendin-4 protects dopaminergic neurons by inhibition of microglial activation and matrix metalloproteinase-3 expression in an animal model of Parkinson's disease
Abstract
Exendin-4 is a naturally occurring more potent and stable analog of glucagon-like peptide-1 (GLP-1) that selectively binds at the GLP-1 receptor. It has been recently demonstrated that GLP-1 receptor stimulation preserves dopaminergic neurons in cellular and rodent models of Parkinson's disease (PD). 1-Methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP) causes nigrostriatal dopaminergic neurotoxicity in rodents; previous studies suggest that activated microglia actively participate in the pathogenesis of PD neurodegeneration. However, the role of microglia in the neuroprotective properties of exendin-4 is still unknown. Here, we show that, in the mouse MPTP PD model, systemic administration of exendin-4 significantly attenuates the loss of substantia nigra pars compacta (SNpc) neurons and the striatal dopaminergic fibers. Exendin-4 prevents MPTP-induced microglial activation in the SNpc and striatum, and the expression of matrix metalloproteinase-3. In addition, exendin-4 also suppressed MPTP-induced expression of pro-inflammatory molecules and tumor necrosis factor α and interleukin-1β. Our data indicate that exendin-4 may act as a survival factor for dopaminergic neurons by functioning as a microglia-deactivating factor and suggest that exendin-4 may be a valuable therapeutic agent for neurodegenerative diseases such as PD.
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“Exendin-4 (10 μg/kg) treatment significantly decreased MPTP-induced microglial activation and suppressed MPTP-induced expression of TNF-α and IL-1β [94].”
From Anti-Inflammatory Effects of GLP-1-Based Therapies beyond Glucose Control (2016) · cites this paper as [94]
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Metadata
- Authors
- Kim, S., Moon, M., & Park, S.
- Affiliations
- Kyung Hee University (KR)
- Corresponding author
- Park, Seungjoon
- Venue
- Journal of Endocrinology
- Publisher
- Bioscientifica
- Published
- 2009-06-29
- Volume
- 202
- Issue
- 3
- Pages
- 431-439
- ISSN
- 0022-0795 (ISSN-L)
- 1479-6805
- OpenAlex
- W2164948885
- Cited by
- 263
- References
- 55
- Citations by year
- 2026: 6 · 2025: 17 · 2024: 14 · 2023: 12 · 2022: 21 · 2021: 22 · 2020: 12 · 2019: 18 · 2018: 20 · 2017: 17 · 2016: 22 · 2015: 19 · 2014: 17 · 2013: 17 · 2012: 15
- FWCI
- 6.18
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Journal of Endocrinology (publishedVersion)
- PubMed (publishedVersion)
- Funders
- Korea Science and Engineering Foundation
- Ministry of Education and Human Resources Development
- Topics
- Health Sciences › Medicine › Clinical Neurology › Parkinson's Disease Mechanisms and Treatments
- Life Sciences › Neuroscience › Neurology › Neuroinflammation and Neurodegeneration Mechanisms
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Nuclear Receptors and Signaling
- Keywords
- exendin-4, Parkinson's disease, dopaminergic neurons, microglial activation, matrix metalloproteinase-3, MPTP-induced neurotoxicity, substantia nigra pars compacta, neuroprotection, GLP-1 receptor, neuroinflammation, TNF-α, IL-1β, nigrostriatal degeneration
- MeSH terms
- Exenatide, Animals, Corpus Striatum, Disease Models, Animal, Dopamine, Gliosis, Hypoglycemic Agents, Male, Mice, Inbred C57BL, Peptides, Substantia Nigra, Venoms, Gene Expression Regulation, Enzymologic, Microglia, Neuroprotective Agents, Inflammation Mediators, Matrix Metalloproteinase 3, Parkinsonian Disorders, Mice, Matrix Metalloproteinase Inhibitors
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