Title : Distinct changes in cAMP and extracellular signal-regulated protein kinase signalling in L-DOPA-induced dyskinesia.

Pub. Date : 2010 Aug 23

PMID : 20808799






4 Functional Relationships(s)
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1 BACKGROUND: In rodents, the development of dyskinesia produced by L-DOPA in the dopamine-depleted striatum occurs in response to increased dopamine D1 receptor-mediated activation of the cAMP - protein kinase A and of the Ras-extracellular signal-regulated kinase (ERK) signalling pathways. Levodopa mitogen-activated protein kinase 1 Homo sapiens
2 BACKGROUND: In rodents, the development of dyskinesia produced by L-DOPA in the dopamine-depleted striatum occurs in response to increased dopamine D1 receptor-mediated activation of the cAMP - protein kinase A and of the Ras-extracellular signal-regulated kinase (ERK) signalling pathways. Levodopa mitogen-activated protein kinase 1 Homo sapiens
3 In contrast, phosphorylation of ERK and S6 was enhanced preferentially after acute L-DOPA administration and decreased during the course of chronic treatment. Levodopa mitogen-activated protein kinase 1 Homo sapiens
4 CONCLUSION: Dysregulation of cAMP signalling is maintained during the course of chronic L-DOPA administration, while abnormal ERK signalling peaks during the initial phase of L-DOPA treatment and decreases following prolonged exposure. Levodopa mitogen-activated protein kinase 1 Homo sapiens