DOPAMINE RECEPTOR-MEDIATED REGULATION OF NEURONAL "CLOCK" GENE EXPRESSION

被引:97
|
作者
Imbesi, M. [1 ]
Yildiz, S. [1 ]
Arslan, A. Dirim [1 ]
Sharma, R. [1 ]
Manev, H. [1 ]
Uz, T. [1 ]
机构
[1] Univ Illinois, Inst Psychiat, Dept Psychiat, Chicago, IL 60612 USA
关键词
primary striatal cultures; mouse; transcription factors; mRNA; quinpirole; SKF38393; RHYTHM-RELATED GENES; SUPRACHIASMATIC NUCLEUS; CIRCADIAN-RHYTHMS; COCAINE SENSITIZATION; RAT STRIATUM; MOUSE; BRAIN; MICE; METHAMPHETAMINE; PHOSPHORYLATION;
D O I
10.1016/j.neuroscience.2008.10.044
中图分类号
Q189 [神经科学];
学科分类号
071006 ;
摘要
Using a transgenic mice model (i.e. "clock" knockouts), clock transcription factors have been suggested as critical regulators of dopaminergic behaviors induced by drugs of abuse. Moreover, it has been shown that systemic administration of psychostimulants, such as cocaine and methamphetamine regulates the striatal expression of clock genes. However, it is not known whether dopamine receptors mediate these regulatory effects of psychostimulants at the cellular level. Primary striatal neurons in culture express dopamine receptors as well as clock genes and have been successfully used in studying dopamine receptor functioning. Therefore, we investigated the role of dopamine receptors on neuronal clock gene expression in this model using specific receptor agonists. We found an inhibitory effect on the expression of mClock and mPer1 genes with the D2-class (i.e. D2/D3) receptor agonist quinpirole. We also found a generalized stimulatory effect on the expression of clock genes mPer1, mClock, mNPAS2 (neuronal PAS domain protein 2), and mBmal1 with the D1-class (i.e. D1) receptor agonist SKF38393. Further, we tested whether systemic administration of dopamine receptor agonists causes similar changes in striatal clock gene expression in vivo. We found quinpirole-induced alterations in mPER1 protein levels in the mouse striatum (i.e. rhythm shift). Collectively, our results indicate that the dopamine receptor system may mediate psychostimulant-induced changes in clock gene expression. Using striatal neurons in culture as a model, further research is needed to better understand how dopamine signaling modulates the expression dynamics of clock genes (i.e. intracellular signaling pathways) and thereby influences neuronal gene expression, neuronal transmission, and brain functioning. (C) 2009 IBRO. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码:537 / 544
页数:8
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