长期暴露于可卡因的影响由神经元蛋白Cdk5调节
1Laboratory of Molecular and Cellular Neuroscience, The Rockefeller University, 1230 York Avenue, New York, New York 10021, USA. bibbj@rockvax.rockefeller.edu
Nature
|March 27, 2001
概括
可卡因成涉及到大脑的适应. 研究人员发现,DeltaFosB增加了循环素依赖性激酶5 (Cdk5) 水平,有助于这些变化,并可能影响多巴胺受体信号传递.
科学领域:
- 神经科学是一个神经科学.
- 分子生物学分子生物学
- 药理学 药理学是指药理学的学科.
背景情况:
- 可卡因成与抵消其影响的大脑适应有关.
- 长期使用可卡因会通过转录因子 (如DeltaFosB) 来改变基因表达.
- 德尔塔B在条纹体中持续存在,这表明它在长期变化中的作用.
研究的目的:
- 为了确定DeltaFosB在条形体中的下游目标.
- 为了研究循环林依赖激酶5 (Cdk5) 在可卡因成中的作用.
主要方法:
- 在可诱导转基因小鼠中利用DNA阵列分析.
- 测量Cdk5信使RNA,蛋白质和活动水平.
- 用Cdk5抑制剂评估行为影响.
主要成果:
- 过度表达的DeltaFosB和慢性可卡因在条形体中增加了Cdk5水平.
- 在长期暴露于可卡因后,Cdk5活性升高.
- 在条形体中抑制Cdk5增强了可卡因的行为效应.
结论:
- 循环素依赖性激酶5 (Cdk5) 是DeltaFosB.的下游目标.
- 在Cdk5中由DeltaFosB介导的变化有助于可卡因成中适应性大脑变化.
- 涉及D1多巴胺受体的Cdk5信号的改变与可卡因成有关.
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