Journal
JOURNAL OF NEUROSCIENCE RESEARCH
Volume 89, Issue 11, Pages 1859-1868Publisher
WILEY
DOI: 10.1002/jnr.22714
Keywords
antioxidant; neurotoxicity; signal transduction
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Funding
- National Natural Science Foundation of China [30973686, 30870589]
- National Basic Research Program of China (973 program) [2011CB707704, 2006CB705704]
- Foundation of State Key Laboratory of Space Medicine Fundamentals and Application, China Astronaut Research and Training Center [SMFA10B01]
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Zinc ion elevation contributes to acute excitotoxic brain injury and correlates with the severity of dementia in chronic neurodegenerative diseases. Downstream control of zinc-triggered signals is believed to be an efficient countermeasure. In the current study, we examined whether the flavonoid luteolin (Lu) could protect human neuroblastoma SH-SY5Y cells against zinc toxicity. We found that Lu suppressed overproduction of reactive oxygen species and protected against apoptotic cell death induced by zinc. By using specific inhibitors, we found that zinc strongly triggered Akt and ERK1/2 activation via a PI3K-Akt-NF-kappa B-ERK1/2-dependent pathway. Furthermore, Lu completely blocked this activation. Our study strongly supports the hypothesis that Lu might protect SH-SY5Y cells against ROS-mediated apoptotic cell death induced by zinc in part by inhibiting the PI3K-Akt-NF-kappa B-ERKs pathway. (C) 2011 Wiley-Liss, Inc.
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