碘化丙啶
活力测定
细胞色素c
细胞凋亡
聚ADP核糖聚合酶
MTT法
化学
绞股蓝
神经保护
程序性细胞死亡
膜联蛋白
胞浆
半胱氨酸蛋白酶3
分子生物学
生物化学
药理学
生物
聚合酶
酶
色谱法
萃取(化学)
标识
DOI:10.1016/j.ijbiomac.2014.05.049
摘要
The aim of the present study was to explore the neuroprotective effects of Gynostemma pentaphyllum polysaccharides (GP) in a 1-methyl-4-phenylpyridiniumion (MPP(+))-induced cellular model of Parkinson's disease (PD) and the underlying mechanisms. Our results indicated that exposure of PC12 cells to 1mM MPP(+) significantly decreased the cell viability when examined by MTT assay, LDH assay, and annexin-V-FITC and propidium iodide (PI) apoptosis detection assays. MPP(+)-induced apoptosis in PC12 cells was accompanied by an increased Bax/Bcl-2 ratio, release of mitochondrial cytochrome c into the cytosol, activation of caspase-3/9 and cleavage of poly (ADP-ribose) polymerase (PARP). However, pretreatment of PC12 cells with 50μg/ml GP prior to MPP(+) exposure effectively attenuated the cytotoxicity and improved cell viability via inhibiting elevated Bax/Bcl-2 ratio, as well as the release of cytosolic cytochrome c. Furthermore, GP was effective in attenuating caspase-3/9 activation and cleavage of PARP in MPP(+)-exposed PC12 cells. These results suggest that the GP has protective effects against MPP(+)-induced neuronal apoptosis in PC12 cells by suppressing apoptosis-related protein, and therefore, might likely be a promising candidate for the treatment of Parkinson's disease (PD).
科研通智能强力驱动
Strongly Powered by AbleSci AI