间接和直接的大麻素激动剂有差异性地影响中边多巴胺释放和相关行为
Kevin M Honeywell1, Timothy G Freels1, Megan A McWain1
1Department of Psychology, The University of Memphis.
Behavioral neuroscience
|April 25, 2024
概括
与间接药物不同的是,直接的大麻素受体1型激动剂改变了小鼠的多巴胺释放和行为. 两种药物都没有表现出滥用责任,但直接的激动作用对中边多巴胺的影响更为显著.
科学领域:
- 神经科学是一个神经科学.
- 药理学 药理学是指药理学的学科.
- 行为科学 行为科学
背景情况:
- 内分泌大麻素系统是治疗各种疾病的关键目标.
- 了解大麻素激动剂对多巴胺的影响对于治疗开发至关重要.
研究的目的:
- 调查直接 (ACEA) 和间接 (AA-5-HT) 大麻素激动剂对中边多巴胺释放和相关行为对小鼠的影响.
- 为了比较直接与间接的大麻素激素对运动运动活动,多巴胺释放和安赫多尼亚相关行为的影响.
主要方法:
- 小鼠每天接受AA-5-HT,ACEA或载体的注射,持续7天.
- 运动机动活动通过开放场地测试来评估.
- 阶段性多巴胺释放被测量使用体内固定电位电压计.
- 条件化的位置偏好和糖偏好测试进行了评估anhedonia.
主要成果:
- 慢性AA-5-HT并没有影响发言运动活动或半边际多巴胺.
- 慢性ACEA降低了养育,降低了阶段性多巴胺释放,并增强了对可卡因的多巴胺反应.
- 无论是AA-5-HT还是ACEA都没有诱导条件化的位置偏好/厌恶或改变糖偏好,这表明滥用责任很低.
结论:
- 直接的大麻素受体1型激动性 (ACEA) 影响中边多巴胺的功能比间接的激动性 (AA-5-HT) 更多.
- 在这种小鼠模型中,两种药物都没有表现出通常与滥用责任相关的行为.
- 这些发现突出了直接和间接大麻素激动剂在多巴胺系统调节中的不同作用.
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