目的:研究不同的应激形式对小鼠新颖物体识别记忆的影响。方法:将小鼠随机分成对照组,束缚应激组以及强迫游泳应激组,应激结束后30 min,3组小鼠进行新颖物体识别测试。结果:束缚应激组辨别指数显著低于对照组(p < 0.05),强迫游泳应激组辨别指数与对照组无显著性差异,各组小鼠总探索时间、活动度均无显著性差异。结论:急性束缚应激损伤小鼠新颖物体识别记忆,而强迫游泳应激对新颖物体识别记忆没有影响。 Objective: To study the effects of different stress forms on novel object recognition and memory in mice. Methods: Mice were randomly divided into control group, restraint stress group and forced swimming stress group. Thirty minutes after the end of stress, three groups of mice were tested for novel object recognition. Results: The discrimination index of the restraint stress group was significantly lower than that of the control group (P < 0.05). The discrimination index of the forced swimming stress group was not significantly different from that of the control group. There was no significant difference in the total exploration time and activity of the mice in each group. Conclusion: Acute restraint stress damages novel object recognition and memory in mice, while forced swimming stress has no effect on novel object recognition memory.
实验在黑色木方盒子(30 cm × 30 cm × 50 cm)中进行。实验由三个阶段组成:习惯化阶段、熟悉阶段和测试阶段 [
6
]。在习惯化阶段,让小鼠在空旷的实验箱中自由探索10分钟,以适应环境;24小时后进行熟悉阶段的实验,两个相同的物体(A+A)被放置在实验箱内对称的位置,距离墙壁8厘米,将小鼠在距两物体等距离处放入盒子中,任其自由探索5分钟;24小时后进行测试实验,一个物体不变,另一个熟悉的物体被替换成一个新颖的(A+B),将小鼠再次在距两物体等距离处放入盒子中,自由探索5分钟 [
7
]。每只小鼠测试结束后,箱内四壁、底面和物体均用75%的酒精擦拭,避免留下气味影响下一只小鼠。记录小鼠对熟悉物体的探索时间(F)和对新物体的探索时间(N),计算辨别指数(discrimination index, DI) [ D I = ( N − F ) / ( N + F ) × 100 % ] [
8
]。探索定义为小鼠鼻子近距离指向物体,鼻子与该物体距离≤1厘米。
梁 凯,于旭东,封 芬. 不同应激形式对新颖物体识别记忆提取的影响Effects of Different Stress Forms on Novel Object Recognition Memory Retrieval[J]. 生理学研究, 2019, 07(04): 25-29. https://doi.org/10.12677/JPS.2019.74005
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