白果内酯在PC12细胞中对NO诱导的细胞毒性的保护作用(英文)

目的:研究白果内酯在PC12细胞中对NO诱导的细胞毒性的保护作用。方法:以MTT法及LDH法检测细胞存活率;同时检测细胞的超氧化物歧化酶(SOD)、过氧化氢酶(CAT)活性及脂质过氧化水平。结果:NO供体SIN-1(50-300μmol·L~(-1))可导致PC12细胞死亡,可使PC12细胞脂质过氧化水平升高。白果内酯预孵育可减少NO诱导的细胞死亡;可抑制脂质过氧化水平升高。白果内酯预孵育本身可使SOD及CAT酶活性升高。结论:白果内酯对NO诱导的细胞毒性作用具保护作用,该保护作用可能与白果内酯升高细胞内SOD和CAT的活性有关。

Protective effect of bilobalide against nitric oxide-induced neurotoxicity in PC12 cells

AIM: To examine the effects of bilobalide on nitric oxide-induced neurotoxicity in pheochromocytoma-derived PC12 cells (PC12 cells). METHODS: PC12 cell survival was monitored by LDH release and 3-(4, 5-dimethylthiazol-2-yl)-2, 5-diphenyltetrazolium bromide (MTT) assays. Superoxide dismutases (SOD) and catalase (CAT) activities were measured based on their abilities to inhibit the oxidation of epinephrine by the xanthine-xanthine oxidase system or to decompose H2O2 respectively. The content of malondialdehyde (MDA) was measured by a fluorometric assay to indicate the lipid peroxidation. RESULTS: 3-Morpholinosydnonimine (SIN-1, 50-300 mumol.L-1) induced PC12 cell damage. After the cells had been pretreated with 10 mumol.L-1 bilobalide for 24 h, the cell viability was increased to 91% +/- 30% from 52% +/- 14% in SIN-1 alone group. Moreover, the activities of SOD and CAT were increased after cells were treated with bilobalide. CONCLUSION: The NO-induced neurotoxicity can be protected by bilobalide in PC12 cells. The bilobalide-induced increase in SOD and CAT activities may serve as one of the mechanisms underlying the neuroprotective effect of bilobalide.