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Behavior
雌性 C57BL/6J 小鼠精神障碍的多重综合社会应激模型
雌性 C57BL/6J 小鼠精神障碍的多重综合社会应激模型
JoVE Journal
Behavior
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JoVE Journal Behavior
A Multiple Integrated Social Stress Model for Psychiatric Disorders in Female C57BL/6J Mice

雌性 C57BL/6J 小鼠精神障碍的多重综合社会应激模型

Full Text
1,225 Views
06:15 min
July 15, 2025

DOI: 10.3791/67117-v

Xiaojing Zhai1,2,3, An Xie1,2,3, Wenxin Zhang1,2,3, Lin Ai1,2,3, Hongxing Zhang1,2,3

1Jiangsu Province Key Laboratory of Anesthesiology,Xuzhou Medical University, 2Jiangsu Province Key Laboratory of Anesthesia and Analgesia Application Technology,Xuzhou Medical University, 3NMPA Key Laboratory for Research and Evaluation of Narcotic and Psychotropic Drugs,Xuzhou Medical University

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通过整合四种日常社会压力源,本研究描述了雌性 C57BL/6J 小鼠精神障碍的多重综合社会压力 (MISS) 模型。经过 10 天的反复 MISS 暴露后,小鼠出现了抑郁和焦虑样表型,从而为研究女性受试者的精神疾病提供了一种自然的、基于病因的动物模型。

本研究旨在通过建立多综合社会应激模型,了解慢性社会应激如何导致雌性小鼠出现精神症状。目前大多数可用的精神疾病模型都是使用雄性动物建立的。该协议引入了一种新的小鼠模型,旨在研究雌性小鼠的这些疾病。这项研究开发了一种可靠的动物模型,使我们能够研究雌性小鼠精神疾病背后的神经生理机制。

[旁白]首先,在雌性受试者小鼠和获胜者候选人的每个笼子中放置一根10厘米长,内径26毫米的亚克力管,让它们在三天内适应并学会通过它。要训练小鼠进行管子比赛,请轻轻抓住每只小鼠的尾巴并将其放在桌子上。然后,握住鼠标的尾巴并将其放在管子的一端。一旦鼠标进入管子,就松开尾巴,让它自愿通过。现在,将鼠标放在管子的另一端并重复相同的过程。再次重复整个过程后,将鼠标放回其家庭笼子中。对于获胜者筛选,准备一根长 30 厘米、内径 26 毫米的亚克力管,并在管上画一条可见的中线。抓住两只获胜候选小鼠的尾巴,并将它们放在管子的两端。允许它们进入并在中点相遇,然后同时释放它们并启动计时器。将获胜者确定为将另一只老鼠推出管外的鼠标并奖励它一分。将两只小鼠放回它们的家笼子里。根据小鼠的总分对小鼠进行排名。对于CD1侵略者筛查,将C57雄性小鼠直接放入CD1雄性的家庭笼中三分钟。记录第一次发作的潜伏期、发作次数和三分钟内攻击行为的持续时间作为攻击性的指标,并再重复筛选程序两天。对于社会竞争失败,将多重综合社会压力或MISS小鼠和获胜小鼠放置在管子的两端,使它们向前走并在中点相遇。MISS 鼠标将被获胜者推出管外。切换两只鼠标的位置并重复交互。然后,将 MISS 和获胜小鼠放回它们的家笼子里。对于改良的替代社会失败应激建模,将雌性MISS小鼠置于CD1攻击者的笼子内,将其限制在穿孔的亚克力覆盖物下,以便替代观察攻击性相互作用。将雄性C57入侵小鼠引入笼子中,以接受CD1小鼠的物理攻击10分钟。10分钟后,移除雄性入侵者,让雌性MISS小鼠和CD1小鼠再接触五分钟的感觉。五分钟后,用新型雄性C57入侵小鼠替换CD1小鼠,并重复整个过程三次。然后,将 MISS 鼠标放回其家庭笼子中。接下来,要模拟不可避免的过度拥挤压力,请在装有垫料的标准笼子内放置一个不透明的套筒。每天将 12 至 15 只雌性小鼠(全是 MISS 小鼠或与其他雌性小鼠混合)引入套管中 30 分钟。对于社会隔离,当MISS小鼠在10天的建模期的剩余时间内没有经历社会竞争失败,替代失败压力或过度拥挤压力时,单独饲养MISS小鼠。蔗糖偏好测试通过测量对甜溶液对水的偏好来评估快感缺乏,结果表明,与幼稚对照相比,暴露于 MISS 的小鼠的蔗糖偏好显着降低。蔗糖偏好测试中的总液体摄入量(包括水和蔗糖)在 MISS 和幼稚小鼠之间没有显着差异,表明蔗糖偏好的降低不是由于液体消耗量的改变。尾悬测试通过测量被动不动来评估行为绝望,结果显示,暴露于 MISS 的小鼠的不动时间明显长于幼稚小鼠。此外,用于通过测量在开放竞技场中心花费的时间来评估焦虑的开放场地测试表明,与幼稚小鼠相比,暴露于 MISS 的小鼠在中心区域花费的时间明显更少。通过避免张开双臂来衡量焦虑的高架迷宫表明,暴露于 MISS 的小鼠张开双臂的时间比幼稚对照组少得多。

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