胆固醇片受体缺失改变了奖励偏好和厌恶抵抗
Cambria R Beane1, Delainey G Lewis1, Nicolaus Bruns Vi1
1Department of Psychology and Center for Neuroscience and Behavior, Miami University, Oxford, OH, USA.
Neuropharmacology
|May 29, 2024
概括
胆固醇细胞中的类阿片受体 (MOR) 不会影响酒精摄入量,但会影响抗厌饮酒的饮酒. 删除这些MORs会改变尼古丁和糖的偏好,这表明它在奖励物质偏好中发挥了作用.
科学领域:
- 神经科学是一个神经科学.
- 行为科学 行为科学
- 药理学 药理学是指药理学的学科.
背景情况:
- 内源性阿片类系统,特别是类阿片受体 (MORs),在酒精消费中发挥作用.
- 在不同的神经元群体内,例如胆性内神经元 (CINs),MORs对与酒精有关的行为所做的特定贡献仍然基本上是未知的.
研究的目的:
- 为了研究MORs在胆固醇细胞 (ChAT-Cre/Oprm1fl/fl小鼠) 在酒精自我管理和偏好的作用.
- 评估胆固醇MOR删除对抗厌恶的饮酒以及对尼古丁和糖糖的偏好的影响.
主要方法:
- 产生ChAT-Cre/Oprm1fl/fl小鼠以创建CIN中MORs的遗传删除.
- 测试酒精,尼古丁和糖的消费和偏好,使用家庭子自我管理范式 (在黑暗中饮酒和间歇性访问).
- 通过将胺添加到乙醇溶液和测量运动活动来评估抗厌饮酒.
主要成果:
- 胆固醇MOR删除在任何饮酒模式中都没有影响乙醇消费或偏好.
- 具有胆固醇MOR删除的男性对氨酸-氨酸的厌恶抵抗性降低.
- 尼古丁偏好下降,而糖糖消耗和偏好在胆固醇MOR删除的女性中增加. 这些女性的运动运动活动也增加了.
结论:
- 胆固醇MORs对饮酒没有必要,但可能会影响饮酒的倾向,尽管有负面的后果.
- 胆固醇MORs在偏好其他奖励物质方面发挥作用,例如尼古丁和砂糖.
- 这些发现突出了MOR在特定神经元群体中在调节物质使用行为中的差异性参与.
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