高架﹢/〇迷宫实验:经典状态焦虑动物模型相关性研究

摘要

Aim To explore the correlation between elevated plus maze (EPM) and elevated zero maze (EZM),as two type animal models of state anxiety in Kunming mice. Methods The behavior of adult,♂/♀,Kunming mice in EPM and EZM was recorded by sequence,for 5 min,with a one-week inter-trial interval. The following parameters were evaluated:percentage of time in open arms (Otime%) and total entries into open and closed arms(Entries). Subsequently,descriptive analysis,fac-tor analysis,cluster analysis,correlation analysis and consisten-cy test were calculated for these parameters. Results T test showed that, compared with EPM, Otime% of EZM (male/fe-male/both sex) decreased, while Entries (male/both sex) in-creased significantly;Fiedman test showed that Otime% (male/female/both sex) and Entries(female/both sex) of both EPM and EZM had great difference between the 5 repeated fragments;Wilcoxon test showed that, compared with EPM, Otime% of EZM in 1st min (male/female/both sex), 2nd min (male/fe-male/both sex),3rd min (female/both sex) decreased, while the Entries in 1st min (male/both sex), 4th min (male/fe-male/both sex),5th min(both sex) increased markedly. Clus-ter analysis showed that EPM and EZM parameters could be clustered into two groups:EPM group and EZM group(male/fe-male/both sex). Factor analysis indicated that the EPM and EZM parameters could be extracted as two factors: EPM factor and EZM factor (male/female/both sex). Correlation analysis displayed either general(in Otime%) or poor(in Entries) cor-relation(male/female/both sex) between EPM and EZM param-eters. Consistency test displayed general consistency (male/fe-male/both sex) in Otime% between EPM and EZM. Conclu-sions Despite of the similar internal principles to induce state anxiety,the different external environment(structure) results in different behavioral patterns,different structure dimensions,fair correlation and concordance between EPM and EZM, and the stable index of EPM and EZM might be preferred to Otime%.%目的 探讨高架﹢迷宫实验(elevated plus maze,EPM)与高架〇迷宫实验(elevated zero maze,EZM)作为经典状态焦虑动物模型的相关性.方法 昆明小鼠(4周龄,♂/♀)依次进行EPM、EZM,实验间隔1周,采用摄像系统记录5 min行为变化,包括进入时间及进入次数;最终纳入实验参数有:开臂区进入时间百分率(Otime%)和两臂区进入总次数(Entries);采用描述性分析、聚类分析、因子分析、相关分析及一致性检验进行EPM与EZM行为模式、结构维度及相关性研究.结果 t 检验结果显示,与 EPM 相比,EZM Otime%(♂/♀/♂+♀)均降低,而Entries(♂/♂+♀)均升高,且差异有统计学意义;Fiedman检验结果显示,EPM/EZM实验参数Otime%(♂/♀/♂+♀)、Entries(♂/♀/♂+♀)重复测量片段间差异均有统计学意义;Wilcoxon检验结果显示,与EPM相比,EZM Otime%在1st min(♂/♀/♂+♀)、2nd min(♂/♀/♂+♀)、3rd min(♀/♂+♀)均降低,而Entries在1st min(♂/♂+♀)、4th min(♂/♀/♂+♀)、5th min(♂+♀)均升高,且差异有统计学意义.聚类分析结果显示, EPM/EZM实验参数可分组为EPM类和EZM类(♂/♀/♂+♀).因子分析结果显示,EPM/EZM实验参数可提取为EPM因子和EZM因子(♂/♀/♂+♀).相关分析结果显示,EPM和EZM实验参数Otime、Entries均具有一般或者较差相关性(♂/♀/♂+♀).一致性检验结果显示,EPM和EZM实验参数Otime%(♂/♀/♂+♀)具有一般一致性.结论 尽管EPM/EZM作为状态焦虑动物模型具有相类似内在原理,但是因为其外在环境(结构)差异性,导致EPM/EZM具有不同行为模式,分属不同结构维度,且仅具有一般相关性和一致性,而稳定性实验参数则首选Otime%.