Endocannabinoids and Dopamine Balance Basal Ganglia Output.

Endocannabinoids and Dopamine Balance Basal Ganglia Output.
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DOI:
10.3389/fncel.2021.639082
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发表时间:
2021
影响因子:
5.3
通讯作者:
Korngreen A
Korngreen A
中科院分区:
医学2区
文献类型:
--
作者:
Gorodetski L;Loewenstern Y;Faynveitz A;Bar-Gad I;Blackwell KT;Korngreen A

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脚内核是基底节的输出核团之一,控制基底节的信息处理。脚内核神经元整合来自纹状体和苍白球的GABA能输入,以及来自丘脑底核的多巴胺能输入。我们发现,内源性大麻素和多巴胺相互作用,以调节所有这些初级传入的脚内核的长期可塑性。我们的研究结果表明,多巴胺和内源性大麻素之间的相互作用决定了脚内核输出的直接途径(纹状体)和间接途径(苍白球)之间的平衡。此外,我们证明,尽管缺乏轴突侧支,信息通过endocannabinoid扩散在脚内核中的相邻神经元之间传递。这些结果将脚内核作为前馈“中继”核的流行观点转变为一个复杂的控制单元,它可能在动作选择过程中起着至关重要的作用。
The entopeduncular nucleus is one of the basal ganglia's output nuclei, thereby controlling basal ganglia information processing. Entopeduncular nucleus neurons integrate GABAergic inputs from the Striatum and the globus pallidus, together with glutamatergic inputs from the subthalamic nucleus. We show that endocannabinoids and dopamine interact to modulate the long-term plasticity of all these primary afferents to the entopeduncular nucleus. Our results suggest that the interplay between dopamine and endocannabinoids determines the balance between direct pathway (striatum) and indirect pathway (globus pallidus) in entopeduncular nucleus output. Furthermore, we demonstrate that, despite the lack of axon collaterals, information is transferred between neighboring neurons in the entopeduncular nucleus via endocannabinoid diffusion. These results transform the prevailing view of the entopeduncular nucleus as a feedforward “relay” nucleus to an intricate control unit, which may play a vital role in the process of action selection.
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