一个腹部海马到核的通路调节冲动性
Molly E Klug1, Léa Décarie-Spain1, Logan Tierno Lauer1
1Human and Evolutionary Biology Section, Department of Biological Sciences, Dornsife College of Letters, Arts and Sciences, University of Southern California, USA.
bioRxiv : the preprint server for biology
|December 3, 2025
概括
冲动性与成和肥胖有关. 这项研究揭示了一个特定的海马 - 状回路,调节男性大鼠的食物导向冲动行为,突出了控制冲动的关键大脑途径.
科学领域:
- 神经科学是一个神经科学.
- 行为神经科学 行为神经科学
- 系统神经科学 系统神经科学
背景情况:
- 强烈的冲动性是药物滥用障碍,博和肥胖症的核心特征.
- 腹部海马体 (vHPC) 参与冲动控制,但其精确的机制尚不清楚.
- 一个vHPC神经元子集投射到核突 (ACB),这是奖励和动机的关键区域.
研究的目的:
- 研究vHPC-ACB信号在调节食物导向冲动性的作用.
- 阐明由vHPC-ACB途径介导的脉冲控制背后的神经生物学机制.
主要方法:
- 在大鼠的食物导向冲动性任务 (DRL测试) 中,利用纤维光度计记录vHPC和ACB中的神经活动.
- 在雄性和雌性大鼠中使用化学遗传学来沉默向ACB投射的vHPC神经元.
- 使用一种新的跨突触病毒策略,选择性地抑制接收vHPC输入的ACB神经元.
主要成果:
- 在vHPC和ACB中,依赖的活性在非冲动和冲动反应之前就增加了.
- 对vHPC-ACB投射的化学遗传沉默增加了男性的冲动行为,但不是女性.
- 选择性抑制vHPC向的ACB神经元在DLR任务中增加了冲动动作.
结论:
- 一个涉及vHPC-ACB投射的特定海马 - 状环节电路调节着冲动行为.
- 这个电路在冲动控制中起着至关重要的作用,特别是在男性中.
- 研究结果提供了关于冲动性和潜在治疗点的神经生物学基础的见解.
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