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A Neural Circuit Mechanism for Encoding Aversive Stimuli in the Mesolimbic Dopamine System

机译:一种用于编码叶胺蛋白多巴胺系统中厌氧刺激的神经电路机制

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摘要

Ventral tegmental area (VTA) dopamine (DA) neurons play a central role in mediating motivated behaviors, but the circuitry through which they signal positive and negative motivational stimuli is incompletely understood. Using in vivo fiber photometry, we simultaneously recorded activity in DA terminals in different nucleus accumbens (NAc) subnuclei during an aversive and reward conditioning task. We find that DA terminals in the ventral NAc medial shell (vNAcMed) are excited by unexpected aversive outcomes and to cues that predict them, whereas DA terminals in other NAc subregions are persistently depressed. Excitation to reward-predictive cues dominated in the NAc lateral shell and was largely absent in the vNAcMed. Moreover, we demonstrate that glutamatergic (VGLUT2-expressing) neurons in the lateral hypothalamus represent a key afferent input for providing information about aversive outcomes to vNAcMed-projecting DA neurons. Collectively, we reveal the distinct functional contributions of separate mesolimbic DA subsystems and their afferent pathways underlying motivated behaviors.
机译:腹侧腹部面积(VTA)多巴胺(DA)神经元在介导的动机行为中起着核心作用,但是它们通过其发出信号正和负励磁刺激的电路被不完全理解。在体内光纤测光中使用,我们在厌恶和奖励调理任务期间同时在不同核心(NAC)亚核中的DA端子中的活性。我们发现腹侧NAC内壳(VNACMED)中的DA端子由意外的厌恶结果和预测它们的提示兴奋,而其他NAC次区域的DA终端持续抑制。奖励 - 预测性提示在NAC横向壳中占据奖励预测性提示,并且在VNACMED中很大程度上不存在。此外,我们证明侧面下丘脑中的谷氨酸谷氨酸(Vglut2表达)神经元代表了用于提供有关VNACMED突出的DA神经元的信息的关键传入输入。统称,我们揭示了单独的中索洛米斯DA子系统的独特功能贡献及其潜在的动机行为的传入途径。

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  • 来源
    《Neuron》 |2019年第1期|共26页
  • 作者单位

    Univ Calif Berkeley Dept Mol &

    Cell Biol 229 Stanley Hall Berkeley CA 94720 USA;

    Univ Calif Berkeley Dept Mol &

    Cell Biol 229 Stanley Hall Berkeley CA 94720 USA;

    Univ Calif Berkeley Dept Mol &

    Cell Biol 229 Stanley Hall Berkeley CA 94720 USA;

    Univ Calif Berkeley Dept Mol &

    Cell Biol 229 Stanley Hall Berkeley CA 94720 USA;

    Univ Calif Berkeley Dept Mol &

    Cell Biol 229 Stanley Hall Berkeley CA 94720 USA;

    Stanford Univ Neurosci Program Stanford CA 94305 USA;

    Univ Calif Davis Sch Med Dept Biochem &

    Mol Med Davis CA 95616 USA;

    Stanford Univ Dept Bioengn Stanford CA 94305 USA;

    Univ Calif Berkeley Dept Mol &

    Cell Biol 229 Stanley Hall Berkeley CA 94720 USA;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 神经病学;
  • 关键词

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