中山大学附属第五医院精神心理科,广东 珠海 519000
罗宇翀,硕士生,研究方向:强迫症的发病机制,E-mail:519139987@qq.com
收稿:2022-02-22,
纸质出版:2022-05-20
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罗宇翀,韦淳仁,陈晓等.喹吡罗诱导的慢性强迫症小鼠模型的改进[J].中山大学学报(医学科学版),2022,43(03):412-421.
LUO Yu-chong,WEI Chun-ren,CHEN Xiao,et al.Improvement of the Mouse Model of Chronic Obsessive-compulsive Disorder Induced by Quinpirole[J].Journal of Sun Yat-sen University(Medical Sciences),2022,43(03):412-421.
罗宇翀,韦淳仁,陈晓等.喹吡罗诱导的慢性强迫症小鼠模型的改进[J].中山大学学报(医学科学版),2022,43(03):412-421. DOI: 10.13471/j.cnki.j.sun.yat-sen.univ(med.sci).2022.0309.
LUO Yu-chong,WEI Chun-ren,CHEN Xiao,et al.Improvement of the Mouse Model of Chronic Obsessive-compulsive Disorder Induced by Quinpirole[J].Journal of Sun Yat-sen University(Medical Sciences),2022,43(03):412-421. DOI: 10.13471/j.cnki.j.sun.yat-sen.univ(med.sci).2022.0309.
目的
2
为了获得造模时间更短且症状维持时间更长的慢性强迫症小鼠模型,我们尝试对已有的喹吡罗诱导的慢性强迫症小鼠模型的造模方式进行优化。
方法
2
将22只小鼠随机分成实验组(
n
=11)和对照组(
n
=11),分别在其颈后皮下注射0.75 mg/kg的喹吡罗溶液或等量的生理盐水后放入强迫行为训练装置中训练,连续重复19 d,并记录两组小鼠训练期间的饮水行为及饮水量,评估喹吡罗对小鼠行为的影响。训练结束后通过进行旷场实验、高架十字迷宫实验、新物体识别等行为学实验,评估小鼠的焦虑状态和认知能力。此外对训练后小鼠进行免疫荧光实验,探究引起小鼠行为改变的神经机制。
结果
2
连续19 d喹吡罗注射结合行为训练能够有效地诱导小鼠表现不伴有焦虑和认知功能下降的类强迫检查行为(
P
<
0.001),该强迫检查行为在训练结束后能够维持28 d以上。该模型小鼠的皮层-纹状体-丘脑-皮层环路上的多个脑区存在激活的现象(
P
<
0.000 1)。
结论
2
慢性喹吡罗给药并结合强迫行为训练,能有效构建出表型明显且稳定的强迫症小鼠模型,并有效缩短造模所需时长。
Objective
2
To obtain a mouse model of chronic obsessive-compulsive disorder with a shorter modeling time and longer symptom duration, we improved an existing method to obtain a simple and stable mouse model of chronic obsessive-compulsive disorder.
Methods
2
22 mice were randomly divided into experimental group (
n
=11) and control group (
n
=11) . The mice were injected subcutaneously with 0.75 mg/kg quinpirole solution or the same amount of saline in the neck for 19 consecutive days and were put into the compulsive behavior training device. The drinking behavior and drinking volume of the two groups were recorded during training, and the effects of quinpirole on the behavior of mice were evaluated. After training, behavioral studies such as open field test, elevated plus maze test and new object recognition test were conducted to evaluate the anxiety state and cognitive ability of the mice after modeling. In addition, immunofluorescence experiments were performed to explore the neural mechanism of behavioral changes in mice.
Results
2
Quinpirole injection combined with behavioral training for 19 days could effectively induce compulsive checking behavior without anxiety or cognitive decline in mice (
P
<
0.001), and this behavior lasted more than 28 days after training. In this model, several brain regions on the cortical-striatum-thalamic-cortical circuit were activated (
P
<
0.000 1).
Conclusion
2
Chronic quinpirole administration combined with behavior training can effectively construct a mouse model of OCD with an obvious and stable phenotype, and effectively shorten the time required for modeling.
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