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Expression of receptors for insulin and leptin in the ventral tegmental area/substantia nigra (VTA/SN) of the rat: Historical perspective

机译:胰岛素和瘦素受体在大鼠腹侧被盖区/黑质(VTA / SN)中的表达:历史观点

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摘要

Since the publication of the observation that dopaminergic neurons in the ventral tegmental area/substantia nigra of the rat express receptors for insulin and leptin, numerous studies have extended and validated these findings. Thus, these major metabolic hormones have effects on synaptic and cell signaling function of the midbrain dopamine neurons, across a range of concentrations that reflect physiologic (fasting vs. fed) and pathophysiologic (diabetes) circumstances. The capacity of metabolic hormones to alter reward behaviors, including palatability-related food intake; motivation for food; and the conditioning of place preference by food, is now appreciated as an integral part of the larger actions of these hormones to regulate caloric homeostasis. Finally, the delineation of metabolic hormone effects on the CNS reward circuitry of normal animals provides the rationale and experimental basis for evaluating dysfunction of reward circuitry in obesity and diabetes.
机译:自从发表在大鼠腹侧被盖区/黑质中的多巴胺能神经元表达胰岛素和瘦素受体的观察结果以来,许多研究已经扩展并验证了这些发现。因此,这些主要的代谢激素在反映生理(禁食与进食)和病理生理(糖尿病)情况的一系列浓度范围内,对中脑多巴胺神经元的突触和细胞信号传导功能具有影响。代谢激素改变奖励行为的能力,包括与适口性有关的食物摄入;食物动机;以及通过食物来调节位置偏好,现在被认为是这些激素调节热量稳态的更大作用的组成部分。最后,代谢激素对正常动物中枢神经系统奖赏回路的作用的描述为评估肥胖和糖尿病奖赏回路的功能障碍提供了理论依据和实验基础。

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