多巴胺D3受体在内核和内核外中的作用,对记忆巩固有条件的调制
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在PubMed上查看摘要
概括
此摘要是机器生成的。核内核和外中的多巴胺D3受体在记忆巩固中起着不同的作用. 这项研究发现特定的受体位置调解了条件刺激对记忆形成的影响.
科学领域
- 神经科学
- 行为神经科学
- 分子精神病学
背景情况
- 条件刺激 (CS) 影响记忆的巩固.
- 多巴胺D3受体 (D3Rs) 参与了这一过程.
- D3Rs在核内核 (NAcC) 和外 (NAcS) 的具体作用尚不清楚.
研究的目的
- 研究NAcC和NAcS D3Rs在CS介导的记忆巩固中的参与.
- 在NAcC和NAcS中区分D3R的功能.
- 在不同的受条件刺激可预测性下检查D3R作用.
主要方法
- 在对象识别记忆任务中使用雄性Sprague-Dawley大鼠.
- 选择性D3R抗剂SB-277011A或抗剂7-OH-DPAT被输入NAcC或NAcS.
- 通过信号主动回避任务 (最佳和次优) 评估了条件化后的记忆巩固.
主要成果
- 给NAcC注入SB-277011A阻断了CS诱导的记忆调节.
- 当CS无效时,向NAcS注入7-OH-DPAT可以增强CS诱导的记忆调制.
- D3R抗作用是NAcC特有的,而激动作用则是NAcS特有的.
结论
- 在NAcC和NAcS中的多巴胺D3受体在记忆巩固中表现出不同的,互补的作用.
- 在最佳条件下,NAcC D3R对阻断CS对记忆的影响至关重要.
- 在非最佳条件下,NAcS D3R增强了CS对记忆的影响,这表明它在检测预测线索方面发挥了作用.
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