Hypoxia-inducible factor 1 mediates the anti-apoptosis of berberine in neurons during hypoxia/ischemia

被引:79
作者
Zhang, Q. [1 ]
Qian, Z. [1 ]
Pan, L. [1 ]
Li, H. [1 ]
Zhu, H. [1 ]
机构
[1] Nanjing Univ Chinese Med, Coll Pharm, Nanjing 210029, Jiangsu, Peoples R China
关键词
berberine; anti-apoptosis; pro-apoptosis; cerebral ischemia; HIF-1; HIF-1-ALPHA EXPRESSION; IN-VITRO; CELLS; PENUMBRA; EXTRACT; PATHWAY; HIF-1; P53; MITOCHONDRIA; HIPPOCAMPUS;
D O I
10.1556/APhysiol.99.2012.3.8
中图分类号
学科分类号
摘要
Berberine, a primary pharmacological active constitute of Coptidis Rhizoma, could inhibit neuronal apoptosis in cerebral ischemia. Here, we aimed to investigate whether and how HIF-1 is implicated in the anti-apoptosis effect of berberine on neurons under hypoxia/ischemia. Viability of PC12 cells treated with berberine prior to or following CoCl2-induced hypoxia was evaluated. Annexin V-PI staining was employed to analyse cell apoptosis ratio. HIF-1 alpha and apoptosis-associated molecules were detected via Western blotting. TUNEL and immunohistochemistry were used to demonstrate apoptosis, HIF-1 alpha and p53 levels in cerebral tissue of middle cerebral artery occlusion (MCAO) rats. Berberine pretreatment promoted PC12 cells survival and inhibited apoptosis under hypoxia condition. At the same time, it decreased cell viability and enhancement of apoptosis were observed with berberine treatment under hypoxia. Decreased HIF-1 alpha, caspase 9, caspase 3 and increased Bcl-2/Bax ratio were responsible for the antiapoptosis of berberine pretreatment. However, pro-apoptosis by berberine under hypoxia was indicated with opposing regulation of those molecules. Significant reduction of apoptosis, HIF-1 alpha and p53 were found in cerebral tissue of MCAO rats treated with berberine. The present study suggests that berberine regulates neuronal apoptosis in cerebral ischemia, which might be dependent on the degree of cell injury. HIF-1 and the followed apoptotic pathway are involved in those effects of berberine.
引用
收藏
页码:311 / 323
页数:13
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