慢性吗啡会损害避免的整感控制:对药物摄入失调的影响
Shihui Huang1, Sydney E Cerveny1, Anna L Ruprecht1
1Department of Neuroscience, Center for Neuroscience and Behavior, Psychopharmacology Laboratory, American University.
Experimental and clinical psychopharmacology
|February 27, 2025
概括
长期暴露于吗啡会损害 interoceptive 药物状态信号厌恶结果的能力,并在老鼠中避免学习. 然而,这种障碍在戒断一段时间后显示部分恢复,这表明耐受性起着作用.
科学领域:
- 神经科学是一个神经科学.
- 行为药理学行为药理学
- 成研究 研究成研究
背景情况:
- 互感性药物状态是内部线索,信号后摄入结果,影响药物摄入调节.
- 厌恶性药物状态可以终止服用药物的发作,但慢性药物暴露可能会损害这种功能.
- 失调的药物摄入常见于广泛的药物暴露,突出需要了解暗示功能.
研究的目的:
- 调查慢性药物暴露是否会损害 interoceptive 药物状态导致避免的能力.
- 检查吗啡诱导的整感受状态在歧视性味道回避程序中的作用.
- 评估慢性吗啡暴露和随后的戒断对避免学习的影响.
主要方法:
- 鼠被训练在一个有歧视的味道避开任务使用吗啡作为疾病的信号.
- 老鼠接受了20天的慢性吗啡 (CM) 或慢性车辆暴露.
- 在长期暴露和3周禁食期间后,在各种吗啡剂量下测试了回避行为.
主要成果:
- 老鼠获得了这种歧视,避免了与吗啡配对的撒卡林.
- 长期暴露于载体的老鼠表现出剂量依赖的回避行为,而暴露于CM的老鼠表现出没有回避行为.
- 经过30天的禁食期,CM暴露的老鼠部分恢复了避免糖的能力.
结论:
- 长期暴露于吗啡会减弱避免学习的整体感知控制.
- 这些发现表明,对吗啡的耐受性可能会导致对药物全感受状态的损害.
- 戒断后避免部分恢复表明,损伤不是永久的,可能是可逆的.
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