Abstract |
The aim of this study was to investigate the neuroprotective effects of gastrodin (GAS), one of the major bioactive components of Gastrodia elata Blume (Tian Ma), against amyloid β (Aβ) (1-42)-induced neurotoxicity in primary neural progenitor cells (NPCs). We found that pretreatment with GAS not only prevents a loss in cell viability following treatment with Aβ (1-42) but also counteracts Aβ (1-42)-triggered release of pro-inflammatory cytokines and nitric oxide (NO) in a dose-dependent manner. Additionally, GAS was able to attenuate Aβ (1-42)-induced apoptosis in NPCs, evidenced by the decreased percentage of apoptotic cells and altered expression of apoptosis-related proteins in response to GAS pretreatment prior to Aβ (1-42) exposure. Furthermore, in Aβ (1-42)-injected C57BL/6 mice, we found that systemic administration of GAS could improve hippocampal neurogenesis, manifested by the increased number of SOX-2 and doublecortin (DCX)-positive cells in the DG area. Mechanistic studies revealed that in NPCs, GAS could reverse the Aβ (1-42)-induced increase in phosphorylation of MEK-1/2, extracellular signal-regulated kinases (ERK), and c-Jun N-terminal kinase (JNK). When combining GAS with the MEK inhibitor U0126 or the JNK inhibitor SP600125, we observed a synergistic effect against Aβ (1-42)-induced reduction in cell viability of NPCs. Taken together, these results show the efficacy and underlying mechanism of GAS against amyloid β (1-42)-induced neurotoxicity and provide substantial insight into the potential merits of GAS for its clinical application in the treatment of Alzheimer's disease.
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Authors | Meng Li, Sumin Qian |
Journal | Journal of molecular neuroscience : MN
(J Mol Neurosci)
Vol. 60
Issue 1
Pg. 21-32
(Sep 2016)
ISSN: 1559-1166 [Electronic] United States |
PMID | 27112440
(Publication Type: Journal Article)
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Chemical References |
- Amyloid beta-Peptides
- Benzyl Alcohols
- Cytokines
- DCX protein, human
- Dcx protein, mouse
- Doublecortin Domain Proteins
- Doublecortin Protein
- Glucosides
- Microtubule-Associated Proteins
- Neuropeptides
- Neuroprotective Agents
- Peptide Fragments
- SOXB1 Transcription Factors
- Sox2 protein, mouse
- amyloid beta-protein (1-42)
- Nitric Oxide
- gastrodin
- Mitogen-Activated Protein Kinases
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Topics |
- Amyloid beta-Peptides
(toxicity)
- Animals
- Apoptosis
- Benzyl Alcohols
(pharmacology)
- Cell Line, Tumor
- Cells, Cultured
- Cytokines
(metabolism)
- Doublecortin Domain Proteins
- Doublecortin Protein
- Glucosides
(pharmacology)
- Hippocampus
(cytology, drug effects, metabolism)
- Humans
- Mice
- Mice, Inbred C57BL
- Microtubule-Associated Proteins
(genetics, metabolism)
- Mitogen-Activated Protein Kinases
(metabolism)
- Neural Stem Cells
(drug effects, metabolism)
- Neurogenesis
- Neuropeptides
(genetics, metabolism)
- Neuroprotective Agents
(pharmacology)
- Nitric Oxide
(metabolism)
- Peptide Fragments
(toxicity)
- SOXB1 Transcription Factors
(genetics, metabolism)
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