A role for hypothalamic dopamine in predicting homeostatic need

下丘脑多巴胺在预测稳态需求中的作用

• 批准号: 10603506
• 负责人: Michael Schaid
• 金额: $ 6.95万
• 依托单位: NORTHWESTERN UNIVERSITY AT CHICAGO
• 依托单位国家: 美国
• 财政年份: 2023
• 资助国家: 美国
• 起止时间: 2023-04-01 至 2026-03-31
• 项目状态: 未结题
• 来源: https://reporter.nih.gov/project-details/10603506
• 关键词: Area; Association Learning; Axon; Behavior; Brain; Calories; Characteristics; Communication; Consumption; Cues; Dangerousness; Development; Dissociation; Dopamine; Eating; Eating Disorders; Ensure; Excision; Feeding behaviors; Fiber; Food; Future; Gymnema sylvestre Gurmarin protein; Homeostasis; Hunger; Hypothalamic structure; Lateral Hypothalamic Area; Learning; Mus; Neuroanatomy; Nucleus Accumbens; Obesity; Organism; Pattern; Photometry; Play; Process; Reporting; Rewards; Role; Route; Sensory; Signal Transduction; Source; Structure of nucleus infundibularis hypothalami; Sucrose; Taste Perception; Testing; Training; Ventral Tegmental Area; Work; detector; dopaminergic neuron; experimental study; feeding; food consumption; hedonic; in vivo; inhibitor; neural circuit; novel; pleasure; response; sweet taste perception

PROJECT SUMMARY In order to efficiently control energy homeostasis, the brain makes predictions about future caloric needs and food availability in order to invigorate food-seeking behavior. It is well established that dopamine neurons play a crucial role in this process, as they communicate prediction error signals to central reward centers, such as the nucleus accumbens. This process reinforces learning and aids in the development of reward-seeking behavior in response to environmental cues. Dopamine release in the lateral hypothalamic area (LHA) - a primary homeostatic control center, has been reported. However, it is unknown if dopamine in LHA encodes prediction errors to guide food-seeking behavior. Further, the source of LHA dopamine is currently unknown. In this proposal we aim to characterize the role of dopamine in LHA and test the hypothesis that LHA receives prediction error signals from dopamine neurons in the ventral tegmental area. The experiments in this proposal will reveal a novel neural circuit and define a new role for dopamine in feeding behavior.

项目摘要 为了有效控制能量稳态，大脑对未来做出预测 热量需求和食物可用性，以激发寻求食物的行为。很好 确定多巴胺神经元在这一过程中起着至关重要的作用 预测误差信号向中央奖励中心，例如伏隔核。这个过程 加强学习和援助，以回应寻求奖励行为 环境提示。下丘脑区域（LHA）的多巴胺释放 - 主要 据报道，稳态控制中心。但是，尚不清楚LHA中的多巴胺是否 编码预测错误来指导寻求食物的行为。此外，LHA多巴胺的来源 目前未知。在此提案中，我们旨在表征多巴胺在LHA和 测试LHA收到来自多巴胺神经元中的预测错误信号的假设 腹侧段区域。该提案中的实验将揭示新的神经回路，并 定义多巴胺在喂养行为中的新作用。