Metabolic hormones, dopamine circuits, and feeding.

Metabolic hormones, dopamine circuits, and feeding.
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DOI:
10.1016/j.yfrne.2009.10.004
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发表时间:
2010-01
影响因子:
7.4
通讯作者:
DiLeone, Ralph J.
DiLeone, Ralph J.
中科院分区:
医学1区
文献类型:
--
作者:
Narayanan, Nandakumar S.;Guarnieri, Douglas J.;DiLeone, Ralph J.

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最近的证据表明,代谢激素如Ghrelin和Leptin可以作用于腹侧被盖区(VTA)中脑多巴胺神经元,从而影响摄食。VTA是投射到伏隔核(NAC)以影响行为的中脑边缘多巴胺神经元的起源。虽然通过全身拮抗剂或靶向基因删除来阻断多巴胺可以损害食物摄入量,但局部NAC多巴胺操作对食物摄入量几乎没有影响。值得注意的是,VTA和NAC中的非多巴胺能操纵在摄食和食物选择上产生更一致的效果。最近的遗传证据支持黑质-纹状体多巴胺通路在食物摄取中的作用,而VTA-NAC回路更有可能参与食物获取的更高层次方面,如动机和线索联系。这些丰富而复杂的文献应该在外周激素如何通过作用于中脑回路影响喂养行为的模型中得到考虑。
Recent evidence has emerged demonstrating that metabolic hormones such as ghrelin and leptin can act on ventral tegmental area (VTA) midbrain dopamine neurons to influence feeding. The VTA is the origin of mesolimbic dopamine neurons that project to the nucleus accumbens (NAc) to influence behavior. While blockade of dopamine via systemic antagonists or targeted gene delete can impair food intake, local NAc dopamine manipulations have little effect on food intake. Notably, non-dopaminergic manipulations in the VTA and NAc produce more consistent effects on feeding and food choice. More recent genetic evidence supports a role for the substantia nigra-striatal dopamine pathways in food intake, while the VTA-NAc circuit is more likely involved in higher-order aspects of food acquisition, such as motivation and cue associations. This rich and complex literature should be considered in models of how peripheral hormones influence feeding behavior via action on the midbrain circuits.
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