Epicatechin isolated from Tripterygium wilfordii extract reduces tau-GFP-induced neurotoxicity in zebrafish embryo through the activation of Nrf2.
Biochem Biophys Res Commun
; 477(2): 283-9, 2016 08 19.
Article
en En
| MEDLINE
| ID: mdl-27301640
ABSTRACT
Tau plays important roles in the assembly and stabilization of the microtubule structure to facilitate axonal transport in mammalian brain. The intracellular tau aggregates to form paired helical filaments leading to neurodegenerative disorders, collectively called tauopathies. In our previous report, we established a zebrafish model to express tau-GFP to induce neuronal death, which could be directly traced in vivo. Recently, we used this model to screen 400 herbal extracts and found 45 of them to be effective on reducing tau-GFP-induced neuronal death. One of the effective herbal extracts is the Tripterygium wilfordii stem extract. HPLC analysis and functional assay demonstrated that epicatechin (EC) is the major compound of Tripterygium wilfordii stem extract to decrease the neurotoxicity induced by tau-GFP. Using a luciferase reporter assay in the zebrafish, we confirmed that EC could activate Nrf2-dependent antioxidant responses to significantly increase the ARE-controlled expression of luciferase reporter gene. These data suggest that EC from the Tripterygium wilfordii stem extract could diminish tau-GFP-induced neuronal death through the activation of Nrf2.
Palabras clave
Texto completo:
1
Bases de datos:
MEDLINE
Asunto principal:
Catequina
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Proteínas tau
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Tripterygium
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Proteínas de Pez Cebra
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Factor 2 Relacionado con NF-E2
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Neuronas
Tipo de estudio:
Prognostic_studies
Idioma:
En
Revista:
Biochem Biophys Res Commun
Año:
2016
Tipo del documento:
Article
País de afiliación:
Taiwán