Journal
NEUROCHEMISTRY INTERNATIONAL
Volume 57, Issue 3, Pages 206-215Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.neuint.2010.05.011
Keywords
Osthole; MPP+; Apoptosis; ROS; PC12 cells
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Funding
- National Natural Science Foundation of China (NSFC) [30930093]
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Background: : The 1-methyl-4-phenylpyridinium ion (MPP+), an inhibitor of mitochondrial complex I, has been widely used as a neurotoxin because it causes a severe Parkinson's disease-like syndrome accompanied by increased levels of intracellular reactive oxygen species (ROS) and apoptotic death. In the present study, we investigated the protective effects of osthole, a coumarin compound extracted from the plant-derived medicine Cnidium monnieri, on MPP+-induced cytotoxicity in cultured rat adrenal pheochromocytoma (PC12) cells. Methods: : PC12 cells were treated with MPP+ 2h after treated with different concentrations of osthole. 24 h later, the cell viability, the release of lactate dehydrogenase, the activity of caspase-3 and cytochrome c, the expression ratio of Bax/Bcl-2 and the generation of intracellular ROS were detected. Results: : We found that pretreatment with osthole on PC12 cells significantly reduced the loss of cell viability, the release of lactate dehydrogenase, the activity of caspase-3 and cytochrome c, the increase in Bax/Bcl-2 ratio and the generation of intracellular ROS induced by MPP+. Moreover, our HPLC analysis of cell extracts confirmed that extracellular osthole does penetrate the cell membrane. Thus osthole may function as an intracellular antioxidant to reduce oxidative stress induced by MPP+. Conclusions: : Therefore, the present study supports the notion that osthole may be a promising neuroprotective agent for the treatment of neurodegenerative disorders such as Parkinson's disease. (C) 2010 Elsevier Ltd. All rights reserved.
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