Abstract
Gintonin, a ginseng-derived glycolipoprotein isolated from ginseng, has been shown to be neuroprotective in several neurological disorders such as Alzheimer’s disease models and depressive-like behaviors. In this study, we sought to investigate the potential protective mechanisms of gintonin in an in vivo MPTP and in vitro MPP+-mediated Parkinson’s disease (PD) model. We hypothesized that activation of nuclear factor erythroid 2-related factor 2/heme oxygenase-1 (Nrf2/HO-1, potential therapeutic targets for neurodegeneration) with gintonin could abrogate PD-associated neurotoxicity by modulating the accumulation of α-synuclein, neuroinflammation, and apoptotic cell death in an MPTP/MPP+ models of PD. Our in vivo and in vitro findings suggest that the neuroprotective effects of gintonin were associated with the regulation of the Nrf2/HO-1 pathway, which regulated the expression of proinflammatory cytokines and nitric oxide synthase and apoptotic markers in the substantia nigra and striatum of the mice. Moreover, the neuroprotective effects of gintonin were also associated with a reduction in α-synuclein accumulation in the mouse substantia nigra and striatum. The neuroprotective effects of gintonin were further validated by analyzing the effects of gintonin on MPP+-treated SH-SY5Y cells, which confirmed the protective effects of gintonin. It remains for future basic and clinical research to determine the potential use of gintonin in Parkinson’s disease. However, to the best of our knowledge, marked alterations in biochemical and morphological setup of midbrain dopaminergic pathways by gintonin in MPTP mice model have not been previously reported. We believe that gintonin might be explored as an important therapeutic agent in the treatment of PD.
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16 April 2024
This article has been retracted. Please see the Retraction Notice for more detail: https://doi.org/10.1007/s12035-024-04175-8
Abbreviations
- DA:
-
Dopamine
- DMSO:
-
Dimethyl sulfoxide
- FBS:
-
Fetal bovine serum
- HO-1:
-
Heme oxygenase-1
- NOS-2:
-
Nitric oxide synthase-2
- MPP+ :
-
1-Methyl-4-phenylpyridinium
- MPTP:
-
1-Methyl-4-phenyl-1,2,3,6-tetrahydropyridine
- Nrf2:
-
Nuclear factor erythroid 2-related factor 2
- PD:
-
Parkinson’s disease
- ROS:
-
Reactive oxygen species
- SNpc:
-
Substantia nigra pars compacta
- STR:
-
Striatum
- TH:
-
Tyrosine hydroxylase
- TNF-α:
-
Tumor necrosis factor-α
- COX-2:
-
Cyclo-oxygenase-2
- LPO:
-
Lipid peroxidation
- Gt:
-
Gintonin
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Acknowledgments
This research was supported by the Brain Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Science, ICT & Future Planning (NRF-2016M3C7A1904391 and NRF-2016M3C7A1913845).
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MGJ: Concept design, data collection and assembly, data analysis and interpretation, animal grouping and treatment, and manuscript preparation. MI: Concept, design, data collection, analysis and interpretation, data assembly, and manuscript preparation. MHJ: conception, data collection, and analysis and interpretation. LY: in vitro data collection and analysis. KCC: in vitro data collection and analysis. SN: provision of gintonin and critical idea for in vivo experiments. HH: basic in vitro data analysis. HR: provision and managing of critical idea for experiments and basic in vitro data analysis. MOK: provision of study material, data analysis and interpretation, administrative support, critical reading of manuscript and final approval of manuscript.
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The animals used in the experiment were handled in accordance with the animal ethics committee (IACUC) guidelines issued by the Division of Applied Life Sciences, Department of Biology at Gyeongsang National University, South Korea. The methods used for animal’s experiments were in accordance with the already-approved guidelines (Approval ID 125) by the animal ethics committee (IACUC) of the Division of Applied Life Sciences, Department of Biology at Gyeongsang National University, South Korea.
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The authors declare that they have no competing interests.
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This article has been retracted. Please see the retraction notice for more detail:https://doi.org/10.1007/s12035-024-04175-8
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Jo, M.G., Ikram, M., Jo, M.H. et al. RETRACTED ARTICLE: Gintonin Mitigates MPTP-Induced Loss of Nigrostriatal Dopaminergic Neurons and Accumulation of α-Synuclein via the Nrf2/HO-1 Pathway. Mol Neurobiol 56, 39–55 (2019). https://doi.org/10.1007/s12035-018-1020-1
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DOI: https://doi.org/10.1007/s12035-018-1020-1