Title : Cocaine-induced CREB phosphorylation in nucleus accumbens of cocaine-sensitized rats is enabled by enhanced activation of extracellular signal-related kinase, but not protein kinase A.

Pub. Date : 2005 Dec

PMID : 16219028






9 Functional Relationships(s)
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1 Cocaine-induced CREB phosphorylation in nucleus accumbens of cocaine-sensitized rats is enabled by enhanced activation of extracellular signal-related kinase, but not protein kinase A. Cocaine cAMP responsive element binding protein 1 Rattus norvegicus
2 Cocaine-induced CREB phosphorylation in nucleus accumbens of cocaine-sensitized rats is enabled by enhanced activation of extracellular signal-related kinase, but not protein kinase A. Cocaine cAMP responsive element binding protein 1 Rattus norvegicus
3 We hypothesized that the same treatment regimen would also enhance cocaine-induced activation of intracellular signaling kinases that phosphorylate cyclic AMP-regulated element-binding protein (CREB), an important mediator of c-fos transcription. Cocaine cAMP responsive element binding protein 1 Rattus norvegicus
4 We hypothesized that the same treatment regimen would also enhance cocaine-induced activation of intracellular signaling kinases that phosphorylate cyclic AMP-regulated element-binding protein (CREB), an important mediator of c-fos transcription. Cocaine cAMP responsive element binding protein 1 Rattus norvegicus
5 Using western blots and immunohistochemistry, we detected cocaine-induced CREB phosphorylation after repeated cocaine administration, but not after repeated saline administration. Cocaine cAMP responsive element binding protein 1 Rattus norvegicus
6 Using western blots and immunohistochemistry, we detected cocaine-induced CREB phosphorylation after repeated cocaine administration, but not after repeated saline administration. Cocaine cAMP responsive element binding protein 1 Rattus norvegicus
7 Unilateral infusions of the MAPK kinase inhibitor U0126 into nucleus accumbens attenuated cocaine-induced ERK and CREB phosphorylation in cocaine-sensitized rats. Cocaine cAMP responsive element binding protein 1 Rattus norvegicus
8 Therefore, enhanced activation of ERK, but not PKA, enables and mediates cocaine-induced CREB phosphorylation in nucleus accumbens of rats that are sensitized by repeated cocaine administration outside their home cages. Cocaine cAMP responsive element binding protein 1 Rattus norvegicus
9 Therefore, enhanced activation of ERK, but not PKA, enables and mediates cocaine-induced CREB phosphorylation in nucleus accumbens of rats that are sensitized by repeated cocaine administration outside their home cages. Cocaine cAMP responsive element binding protein 1 Rattus norvegicus