Leptin regulates the reward value of nutrient.

Leptin regulates the reward value of nutrient.
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DOI:
10.1038/nn.2977
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发表时间:
2011-11-13
影响因子:
25
通讯作者:
Friedman J
Friedman J
中科院分区:
医学1区
文献类型:
--
作者:
Domingos AI;Vaynshteyn J;Voss HU;Ren X;Gradinaru V;Zang F;Deisseroth K;de Araujo IE;Friedman J

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我们开发了一种用于定量营养素的奖励值的测定方法,并使用它来分析代谢状态和瘦素的影响。在该试验中,小鼠在两个吸管之间进行选择,其中一个分配水并与多巴胺能(DA)神经元的光遗传学激活偶联,另一个分配天然或人工甜味剂。该测定测量了甜味剂相对于DA神经元的舔诱导的光遗传学激活的奖励值。与三氯蔗糖相比,小鼠更喜欢DA神经元的光遗传学刺激,但不喜欢蔗糖。然而,与蔗糖相比,小鼠更喜欢三氯蔗糖加光遗传学刺激。我们发现,食物限制增加了蔗糖相对于三氯蔗糖加光遗传学刺激的价值,瘦素降低了它。我们的数据表明,瘦素抑制蔗糖的能力,以驱动味觉无关的DA神经元激活,并提供新的见解瘦素的影响食物摄入的机制。
We developed an assay for quantifying the reward value of nutrient and used it to analyze the effects of metabolic state and leptin. In this assay, mice chose between two sippers, one of which dispensed water and was coupled to optogenetic activation of dopaminergic (DA) neurons and the other of which dispensed natural or artificial sweeteners. This assay measured the reward value of sweeteners relative to lick-induced optogenetic activation of DA neurons. Mice preferred optogenetic stimulation of DA neurons to sucralose, but not to sucrose. However, the mice preferred sucralose plus optogenetic stimulation versus sucrose. We found that food restriction increased the value of sucrose relative to sucralose plus optogenetic stimulation, and that leptin decreased it. Our data suggest that leptin suppresses the ability of sucrose to drive taste-independent DA neuronal activation and provide new insights into the mechanism of leptin's effects on food intake.
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