Role of MEK-ERK pathway in morphine-induced conditioned place preference in ventral tegmental area of rats.
J Neurosci Res
; 88(7): 1595-604, 2010 May 15.
Article
en En
| MEDLINE
| ID: mdl-20091775
ABSTRACT
A major goal of research on drug addiction is to develop the effective treatments to deal with the long-term behavioral disorders especially reinstatement induced by the addictive drugs such as opiates, cocaine, and cannabinoid. The molecular mechanisms underlying these substance-related disorders remain unclear so far. Here we used the model of morphine-induced conditioned place preference (CPP) in rats to mimic the progress of drug-taking, withdrawal and relapse in human. The tissue of ventral tegmental area (VTA), one of the most important brain structures associated with abused drug-related disorders, was taken and two-dimensional electrophoresis (2-DE) was performed to analyze and compare the changes of protein expression patterns during the different stages of morphine-induced CPP. First, we found that there were 80 proteins identified to be changed in the process of morphine-induced CPP. Furthermore, as the mitogen-activated protein kinase kinase 1 (MAPKK1) was increased significantly in the stages of establishment and reinstatement, we confirmed the change of activated extracellular signal-regulated kinase (ERK) by Western blotting in VTA tissue and cultured cell. The results demonstrated that the activated MEK-ERK pathway by chronic morphine treatment in VTA was involved in morphine-induced reinstatement. Moreover, inhibition of MEK-ERK pathway by infusion the MEK inhibitor U0126 in VTA blocked the establishment of morphine-induced CPP. The present study found significant changes in a group of protein expressions in VTA during morphine-induced CPP and further confirmed the role of MEK-ERK cell signaling pathway of VTA in morphine addiction.
Texto completo:
1
Colección:
01-internacional
Banco de datos:
MEDLINE
Asunto principal:
Área Tegmental Ventral
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Condicionamiento Psicológico
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Sistema de Señalización de MAP Quinasas
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Morfina
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Dependencia de Morfina
Límite:
Animals
Idioma:
En
Revista:
J Neurosci Res
Año:
2010
Tipo del documento:
Article
País de afiliación:
China