Journal
NEUROSCIENCE RESEARCH
Volume 48, Issue 2, Pages 195-202Publisher
ELSEVIER IRELAND LTD
DOI: 10.1016/j.neures.2003.10.012
Keywords
1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine; SP600125; C-jun N-terminal kinase; phospho-C-jun; dopaminergic neurons; Parkinson; mouse
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Increasing evidence suggests that c-Jun N-terminal kinase (INK) is an important kinase mediating neuronal apoptosis in Parkinson's disease (PD) model induced by 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP). In order to study roles of JNK activity in neuronal apoptosis in this model, we blocked JNK activity in vivo using a specific inhibitor of JNK, SP600125. Our data showed that MPTP-induced phospho-c-Jun of substantial nigral neurons, caused apoptosis of dopaminergic neurons, and decreased the dopamine level in striatal area. We found that inhibiting JNK with SP600125 reduced the levels of c-Jun phosphorylation, protected dopaminergic neurons from apoptosis, and partly restored the level of dopamine in MPTP-induced PD in C57BL/6N mice. These results indicate that INK pathway is the major mediator of the neurotoxic effects of MPTP in vivo and inhibiting JNK activity may represent a new and effective strategy to treat PD. (C) 2003 Elsevier Ireland Ltd and The Japan Neuroscience Society. All rights reserved.
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