Icariin protects against brain injury by enhancing SIRT1-dependent PGC-1alpha expression in experimental stroke.
Neuropharmacology
; 59(1-2): 70-6, 2010.
Article
em En
| MEDLINE
| ID: mdl-20381504
ABSTRACT
Icariin (ICA) has neuroprotection in oxygen-glucose deprivation (OGD) neurons by increasing Sirtuin1 (SIRT1). However, little is known about the role of ICA on stroke. SIRT1 is a class III histone deacetylase and activates peroxisome proliferator-activated receptor gamma coactivator-1alpha (PGC-1alpha) which stimulates mitochondrial activity. This study aims to investigate the expression of SIRT1 and PGC-1alpha during ICA's neuroprotection against ischemia. In vivo, behavioral test, infarct size and brain water content were evaluated on middle cerebral artery occlusion (MCAO) mouse models treated by ICA/saline. In vitro, primary cortical neurons were tortured by OGD in the presence of ICA or SIRT1 inhibitor III or PGC-1alpha siRNA. Cell viability and mortality were measured by MTT and flow cytometer assay. Knockdown efficiency of PGC-1alpha siRNA was measured by real time PCR. Expressions of SIRT1 and PGC-1alpha were also investigated. In result, neurological scores, infarct size and brain edema were all significantly improved, the cortical expressions of SIRT1 and PGC-1alpha were higher with ICA compared to the control (P < 0.05), and reversed by SIRT1 inhibitor III/PGC-1alpha siRNA. In conclusion, ICA protects against brain ischemic injury by increasing the SIRT1 and PGC-1alpha expression, potentially to be a neuroprotectant for ischemic brain injury.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Flavonoides
/
Lesões Encefálicas
/
Transativadores
/
Fármacos Neuroprotetores
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Infarto da Artéria Cerebral Média
/
Sirtuína 1
Tipo de estudo:
Prognostic_studies
Idioma:
En
Revista:
Neuropharmacology
Ano de publicação:
2010
Tipo de documento:
Article