Waving Through the Window: A Model of Volitional Social Interaction in Female Mice.

Waving Through the Window: A Model of Volitional Social Interaction in Female Mice.
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DOI:
10.1016/j.biopsych.2021.10.023
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发表时间:
2022-06-01
影响因子:
10.6
通讯作者:
--
中科院分区:
医学1区
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社会行为的小鼠模型未能解释社会互动的意志方面,目前对社会行为的神经生物学研究几乎完全使用C57BL/6J小鼠,大多数转基因小鼠的背景品系。在这里,我们介绍了一个可操作的社会自我管理和选择的鼠标模型,使用的是定制的设备。首先,我们训练青春期和成年雌性C57BL/6J和CD1小鼠自我给予可口的食物颗粒,然后在不断增加的固定比率反应要求下进行杠杆按压,以获得与年龄匹配的女性社会伴侣。接下来,我们测试了他们寻求社会交往的动机,采用递进比率强化计划,在社交孤立后再次寻求社会寻求,以及在美味食物和社会互动之间做出选择。我们还测试了成年雌性CD1和C57BL/6J小鼠的社会条件性位置偏爱(CPP)。两个品系的青春期和成年雌性小鼠的食物自我摄取率相似。相比之下,在两种强化方案下,CD1小鼠表现出明显比C57BL/6J小鼠更强的社会自我给药。CD1小鼠在社交孤立后表现出强烈的社会寻求,而C57BL/6J小鼠则没有。在选择任务中,CD1小鼠更喜欢社会互动,而C57BL/6J小鼠更喜欢食物。CD1而不是C57BL/6J小鼠表现出很强的社会性CPP。品系差异与年龄无关。我们的数据显示,CD1小鼠是研究女性社会回报学习的更好品系。我们的老鼠可操控的社会模型提供了一个工具,利用老鼠特有的遗传工具,研究女性社会奖励的神经生物学基础,以及精神疾病中社会奖励的破坏。
Mouse models of social behavior fail to account for volitional aspects of social interaction and current neurobiological investigation of social behavior is performed almost exclusively using C57BL/6J mice, the background strain of most transgenic mice. Here, we introduce a mouse model of operant social self-administration and choice, using a custom-made apparatus. First, we trained adolescent and adult female C57BL/6J and CD1 mice to self-administer palatable food pellets and then to lever-press under increasing fixed-ratio response requirements for access to an age-matched female social partner. Next, we tested their motivation to seek social interaction using a progressive ratio reinforcement schedule, relapse to social seeking after social isolation, and choice between palatable food versus social interaction. We also tested social conditioned place preference (CPP) in adult female CD1 and C57BL/6J mice. Adolescent and adult female mice of both strains showed similar rates of food self-administration. In contrast, CD1 mice demonstrated significantly stronger social self-administration than C57BL/6J mice under both reinforcement schedules. CD1 but not C57BL/6J mice demonstrated robust social seeking after social isolation. In the choice task, CD1 mice preferred social interaction, whereas C57BL/6J mice preferred food. CD1 but not C57BL/6J mice demonstrated robust social CPP. The strain differences were age-independent. Our data show that CD1 mice are a better strain for studying female social reward learning. Our mouse operant social model provides a tool for research on neurobiological substrates of female social reward, and disruption of social reward in psychiatric disorders, using mice-specific genetic tools.
杏仁核到 - 高丘脑巡回赛,以获得社会奖励。
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