毒理性
多巴胺(DA)引起的氧化应激可能在帕金森病(PD)的发病机制中发挥重要作用。(+/-)异冰片是一种单萜醇,存在于许多药用植物的精油中,是一种已知的抗氧化剂。在本研究中,我们调查了异冰片对6-羟基多巴胺(6-OHDA)诱导的人神经母细胞瘤SH-SY5Y细胞死亡的神经保护作用。用异冰片预处理SH-SY5Y细胞显著减少了6-OHDA诱导的活性氧种(ROS)的产生和6-OHDA诱导的细胞内钙的增加。此外,异冰片处理逆转了6-OHDA诱导的凋亡。异冰片保护了细胞免受6-OHDA诱导的胱天蛋白酶-3活性增加和细胞色素C从线粒体向细胞质转位的影响。异冰片防止了6-OHDA降低Bax/Bcl-2比例。我们还观察到异冰片降低了c-Jun N末端激酶的激活,并诱导了6-OHDA抑制的蛋白激酶C(PKC)的激活。我们的结果表明,异冰片的保护功能取决于其抗氧化潜力,并且强烈建议异冰片可能是一种有效的治疗与氧化应激相关的神经退行性疾病的药物。
Oxidative stress caused by dopamine (DA) may play an important role in the pathogenesis of Parkinson's disease (PD). (+/-) Isoborneol is a monoterpenoid alcohol present in the essential oils of numerous medicinal plants and is a known antioxidant. In this study, we investigated the neuroprotective effect of isoborneol against 6-hydroxydopamine (6-OHDA)-induced cell death in human neuroblastoma SH-SY5Y cells. Pretreatment of SH-SY5Y cells with isoborneol significantly reduced 6-OHDA-induced generation of reactive oxygen species (ROS) and 6-OHDA-induced increases in intracellular calcium. Furthermore, apoptosis induced by 6-OHDA was reversed by isoborneol treatment. Isoborneol protected against 6-OHDA-induced increases in caspase-3 activity and cytochrome C translocation into the cytosol from mitochondria. Isoborneol prevented 6-OHDA from decreasing the Bax/Bcl-2 ratio. We also observed that isoborneol decreased the activation of c-Jun N-terminal kinase and induced activation of protein kinase C (PKC) which had been suppressed by 6-OHDA. Our results indicate that the protective function of isoborneol is dependent upon its antioxidant potential and strongly suggest that isoborneol may be an effective treatment for neurodegenerative diseases associated with oxidative stress.
来源:Hazardous Substances Data Bank (HSDB)