想要伤害的东西:D1多巴胺神经元刺激在CeA中足以诱导不适应的吸引力
David Nguyen1, Kent C Berridge2
1Department of Psychology, University of Michigan, Ann Arbor, MI, USA. davnguye@umich.edu.
Communications biology
|November 17, 2025
概括
研究人员发现,在老鼠桃体 (CeA) 中心核中刺激D1表达神经元会产生不适应性吸引力,这是成的一个关键特征. 这一发现揭示了大脑神经系统的基础.
科学领域:
- 神经科学是一个神经科学.
- 成研究 研究成研究
- 行为科学 行为科学
背景情况:
- 不适应的欲望,包括成,可以持续尽管负面的结果.
- "想要伤害的"现象,即个体追求有害的刺激,是适应不良欲望的实验室模型.
- 之前的研究在老鼠中使用光遗传激发杏仁体 (CeA) 中心核诱导了这种行为.
研究的目的:
- 为了确定CeA内负责产生不适应性吸引力的特定神经元亚型.
- 研究D1多巴胺受体表达,D2多巴胺受体表达和CeA中的CRF表达神经元的作用.
主要方法:
- 利用Cre向的光遗传刺激在老鼠中选择性地激活不同的CeA神经元亚型.
- 评估了在神经元刺激后诱导冲击棒吸引力和自我施加的冲击.
- 检查了有动机的行为,如跨越障碍和寻找线索,以及中边界Fos激活.
主要成果:
- 对表达D1多巴胺受体CeA神经元的选择性刺激足以诱导冲击杆吸引力.
- 这种效果与刺激一般的CeA神经元群体 (hSyn向刺激) 相似.
- 这两种刺激方法都导致了类似的自我施加的冲击和动机行为,表明了激励激励途径的参与.
结论:
- CeA中的D1多巴胺受体表达神经元在产生"想要疼痛"方面发挥着关键作用.
- 这一发现突出了一个特定的神经回路,它是成类动机的基础.
- 这些结果提供了对成的神经生物学机制的见解.
更多相关视频
09:54Comprehensive Profiling of Dopamine Regulation in Substantia Nigra and Ventral Tegmental Area
Published on: August 10, 2012
26.4K
08:07Simultaneous Detection of c-Fos Activation from Mesolimbic and Mesocortical Dopamine Reward Sites Following Naive Sugar and Fat Ingestion in Rats
Published on: August 24, 2016
9.6K
相关概念视频
01:25Adrenergic Agonists: Indirect-Acting Agents
2.5K
Indirect-acting adrenergic agonists potentiate the effects of endogenous catecholamines through different mechanisms without directly binding to adrenoceptors.
One mechanism involves depleting stored catecholamines by displacing them from synaptic vesicles. These agents, known as "displacers," are transported into vesicles at the expense of noradrenaline. Examples include amphetamine and tyramine, which lack a catechol moiety, resulting in prolonged action, improved oral...
One mechanism involves depleting stored catecholamines by displacing them from synaptic vesicles. These agents, known as "displacers," are transported into vesicles at the expense of noradrenaline. Examples include amphetamine and tyramine, which lack a catechol moiety, resulting in prolonged action, improved oral...
2.5K
01:27Adrenergic Neurons: Neurotransmission
5.1K
Postganglionic sympathetic fibers (except those supplying the sweat glands) releasing noradrenaline or norepinephrine are called noradrenergic or adrenergic neurons. Noradrenaline, dopamine, adrenaline, or epinephrine are collectively called "catecholamines" as they contain a catechol moiety and an amine side chain. The five stages of neurotransmitter release involve their synthesis, storage, release, reuptake and metabolism.
Synthesis: Catecholamine synthesis requires tyrosine, which...
Synthesis: Catecholamine synthesis requires tyrosine, which...
5.1K
01:21Drugs Affecting Neurotransmitter Release or Uptake
1.5K
Certain drugs can affect how neurotransmitters called catecholamines, are released or taken back up in the adrenergic neuron. They can have different effects on the body's sympathetic transmission. Reserpine, a natural compound found in the Rauwolfia shrub, blocks a transporter called vesicular monoamine transporter (VMAT), which leads to a buildup of catecholamines in the cell and reduces sympathetic transmission. Another drug called guanethidine works in multiple ways, including blocking...
1.5K
01:30Regulation of Food Intake
2.3K
Short-term regulation of food intake primarily involves neural signals from the gastrointestinal (GI) tract, blood nutrient levels, and GI tract hormones. Communication between the gut and brain via vagal nerve fibers plays a significant role in evaluating the contents of the gut. Clinical studies have shown that protein ingestion produces a more prolonged response in these nerve fibers compared to an equivalent amount of glucose. Additionally, the activation of stretch receptors caused by GI...
2.3K