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首页> 外文期刊>The European Journal of Neuroscience >Key role for enkephalinergic tone in cortico-striatal-thalamic function.
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Key role for enkephalinergic tone in cortico-striatal-thalamic function.

机译:脑啡肽功能调在皮质-纹状体-丘脑功能中的关键作用。

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摘要

Whereas the role of dopaminergic tone in the cortico-striatal-thalamic system is well-established, the role of endogenous opioids in the function of this system is less understood. We show that Borna disease virus infection of adult rats results in an increase in preproenkephalin transcripts in the striatum of Borna-infected rats, a region important for forming coordinated sequential motor actions and in developing programmes of thought and motivation. Stereotypic behaviours and dyskinesias, the clinical hallmarks of infection in adult Lewis rats (BD rats), are accompanied by a disrupted pattern of immediate early gene c-fos activation in the motor thalamus, with significance for the breakdown in coordinated sequential motor actions. We also find increased preproenkephalin in infected cultured neuroblastoma and rat foetal glial cells. The expression pattern of enkephalin mRNA in vivo and in vitro suggest that increased enkephalin function is one of the neuropharmacological means by which Borna disease virus causes motor disease of animals and possibly cognitive and affective disease in man, and further suggest that enkephalins play a critical role in the maintenance of a balanced tone of activity in the cortico-basal ganglia-thalamo-cortical loops.
机译:尽管多巴胺能基调在皮质-纹状体-丘脑系统中的作用是众所周知的,但是内源性阿片样物质在该系统的功能中的作用尚不清楚。我们显示成年大鼠的博尔纳病病毒感染导致博尔纳感染的大鼠纹状体中前原脑啡肽的转录增加,该区域对于形成协调的顺序运动动作以及发展思维和动机程序很重要。刻板行为和运动障碍是成年Lewis大鼠(BD大鼠)感染的临床标志,伴随着运动丘脑中立即早期c-fos激活模式的破坏,这对于协调的顺序运动动作的破坏具有重要意义。我们还发现感染的培养的神经母细胞瘤和大鼠胎儿神经胶质细胞中前脑啡肽的含量增加。脑啡肽mRNA在体内和体外的表达模式表明,脑啡肽功能的增强是博尔纳病病毒引起动物运动性疾病以及可能引起人类认知和情感疾病的神经药理学手段之一,并且进一步表明脑啡肽起关键作用维持皮质-基底神经节-丘脑-皮质环中平衡的活动音调。

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