Title : L-DOPA activates ERK signaling and phosphorylates histone H3 in the striatonigral medium spiny neurons of hemiparkinsonian mice.

Pub. Date : 2009 Feb

PMID : 19187092






7 Functional Relationships(s)
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1 L-DOPA activates ERK signaling and phosphorylates histone H3 in the striatonigral medium spiny neurons of hemiparkinsonian mice. Levodopa mitogen-activated protein kinase 1 Mus musculus
2 In the dopamine-depleted striatum, extracellular signal-regulated kinase (ERK) signaling is implicated in the development of L-DOPA-induced dyskinesia. Levodopa mitogen-activated protein kinase 1 Mus musculus
3 In the dopamine-depleted striatum, extracellular signal-regulated kinase (ERK) signaling is implicated in the development of L-DOPA-induced dyskinesia. Levodopa mitogen-activated protein kinase 1 Mus musculus
4 To gain insights on its role in this disorder, we examined the effects of L-DOPA on the state of phosphorylation of ERK and downstream target proteins in striatopallidal and striatonigral medium spiny neurons (MSNs). Levodopa mitogen-activated protein kinase 1 Mus musculus
5 In 6-hydroxydopamine-lesioned Drd2-EGFP mice, L-DOPA increased the phosphorylation of ERK, mitogen- and stress-activated kinase 1 and histone H3, selectively in EGFP-negative MSNs. Levodopa mitogen-activated protein kinase 1 Mus musculus
6 The same pattern of activation of ERK signaling was observed in dyskinetic mice, after repeated administration of L-DOPA. Levodopa mitogen-activated protein kinase 1 Mus musculus
7 Our results demonstrate that in the dopamine-depleted striatum, L-DOPA activates ERK signaling specifically in striatonigral MSNs. Levodopa mitogen-activated protein kinase 1 Mus musculus