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首页> 外文期刊>Neuron >Inhibitory Input from the Lateral Hypothalamus to the Ventral Tegmental Area Disinhibits Dopamine Neurons and Promotes Behavioral Activation
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Inhibitory Input from the Lateral Hypothalamus to the Ventral Tegmental Area Disinhibits Dopamine Neurons and Promotes Behavioral Activation

机译:从下丘脑外侧到腹侧被盖区的抑制性输入抑制多巴胺神经元并促进行为激活

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摘要

Projections from the lateral hypothalamus (LH) to the ventral tegmental area (VTA), containing both GABAergic and glutamatergic components, encode conditioned responses and control compulsive reward-seeking behavior. GABAergic neurons in the LH have been shown to mediate appetitive and feeding-related behaviors. Here we show that the GABAergic component of the LH-VTA pathway supports positive reinforcement and place preference, while the glutamatergic component mediates place avoidance. In addition, our results indicate that photoactivation of these projections modulates other behaviors, such as social interaction and per-severant investigation of a novel object. We provide evidence that photostimulation of the GABAergic LH-VTA component, but not the glutamatergic component, increases dopamine (DA) release in the nucleus accumbens (NAc) via inhibition of local VTA GABAergic neurons. Our study clarifies how GABAergic LH inputs to the VTA can contribute to generalized behavioral activation across multiple contexts, consistent with a role in increasing motivational salience.
机译:从下丘脑外侧(LH)到腹侧被盖区(VTA)的投影,包含GABA能和谷氨酸能成分,编码条件反应并控制强迫性寻求奖励行为。 LH中的GABA能神经元已显示出介导食欲和进食相关行为。在这里,我们显示LH-VTA途径的GABA能成分支持正向增强和位置偏好,而谷氨酸能成分介导位置回避。此外,我们的结果表明,这些投射的光激活可以调节其他行为,例如社交互动和对新物体的永久性研究。我们提供的证据表明,光刺激GABA能LH-VTA组分而不是谷氨酸能组分,通过抑制局部VTA GABA能神经元增加伏伏核(NAc)中多巴胺(DA)的释放。我们的研究阐明了VTA的GABA能LH输入如何在多种情况下促进普遍的行为激活,这与增加动机显着性的作用一致。

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