NDLI: Sustained elevation of extracellular dopamine causes motor dysfunction and selective degeneration of striatal GABAergic neurons

Content Provider	PubMed Central
Author	Cyr, Michel Beaulieu, Jean-martin Laakso, Aki Sotnikova, Tatyana D. Yao, Wei-dong Bohn, Laura M. Gainetdinov, Raul R. Caron, Marc G.
Copyright Year	2003
Abstract	Dopamine is believed to contribute to the degeneration of dopamine-containing neurons in the brain. However, whether dopamine affects the survival of other neuronal populations has remained unclear. Here we document that mice with persistently elevated extracellular dopamine, resulting from inactivation of the dopamine transporter gene, sporadically develop severe symptoms of dyskinesia concomitant with apoptotic death of striatal dopamine-responsive γ-aminobutyric acidergic neurons. Chronic inhibition of dopamine synthesis prevents the appearance of motor dysfunction. The neuronal death is associated with overactivation of dopaminergic signaling as evidenced by the robust up-regulation of striatal ΔFosB, cyclin-dependent kinase 5, and p35. Moreover, hyperphosphorylation of the tau protein, a phenomenon associated with the activation of cyclin-dependent kinase 5 in several neurodegenerative disorders, is observed in symptomatic mice. These findings provide in vivo evidence that, in addition to its proposed role in the degeneration of dopamine neurons, dopamine can also contribute to the selective death of its target neurons via a previously unappreciated mechanism.
Related Links	http://dx.doi.org/10.1073/pnas.1831768100
Ending Page	11040
Page Count	6
Starting Page	11035
File Format	PDF
ISSN	00278424
e-ISSN	10916490
Journal	Proceedings of the National Academy of Sciences of the United States of America
Issue Number	19
Volume Number	100
Language	English
Publisher	National Academy of Sciences
Publisher Date	2003-09-16
Access Restriction	Open
Rights Holder	National Academy of Sciences
Subject Keyword	General Research in Higher Education
Content Type	Text
Resource Type	Article
Subject	Multidisciplinary

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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