B-GOS对阿尔茨海默病转基因小鼠认知行为和抑郁情绪的影响*

doi:10.12047/j.cjap.6105.2021.028

摘要/Abstract

摘要： 目的: 观察新型低聚半乳糖(B-GOS)对APP/PS1/tau阿尔茨海默病转基因小鼠认知行为和抑郁情绪的影响。方法: 选用5月龄雄性APP/PS1/tau AD转基因小鼠和C57BL/6J对照小鼠,分为C57+Vehicle组、C57+B-GOS组、APP/PS1/tau+Vehicle组和APP/PS1/tau+B-GOS组,每组10只。B-GOS连续给予5个月后,依次采用旷场实验、新物体识别实验、Y迷宫实验、Morris水迷宫实验、悬尾实验、强迫游泳实验和条件恐惧实验,检测各组小鼠的认知行为表现和抑郁情绪变化。结果: ① 旷场实验:APP/PS1/tau+Vehicle组小鼠在旷场中央区域的活动时间百分比显著低于C57+Vehicle组小鼠(P＜0.01),经过B-GOS干预后显著升高(P＜0.05)。② 新物体识别实验:APP/PS1/tau+Vehicle组小鼠的新物体识别指数(NOI)显著低于C57+Vehicle组小鼠(P＜0.01), 经过B-GOS干预后显著升高(P＜0.05)。③ Y迷宫实验:APP/PS1/tau+Vehicle组小鼠的自发交替正确率显著低于C57+Vehicle组小鼠(P＜0.01),经过B-GOS干预后显著升高(P＜0.01)。④ 经典水迷宫实验:APP/PS1/tau+Vehicle组小鼠在第4日和第5日的逃避潜伏期显著长于C57+Vehicle组小鼠(P＜0.01),经过B-GOS干预后均显著缩短(P＜0.05);在空间探索阶段,APP/PS1/tau+Vehicle组小鼠的目标象限游泳时间百分比和穿越平台次数均显著低于C57+Vehicle组小鼠(P＜0.01),经过B-GOS干预后均显著增加(P＜0.01)。⑤ 悬尾试验和强迫游泳实验:APP/PS1/tau+Vehicle组小鼠的不动时间百分比均显著高于C57+Vehicle组小鼠(P＜0.01),经过B-GOS干预后均显著降低(P＜0.01)。⑥ 条件恐惧实验:在条件刺激(CS)作用前,各组小鼠的僵直比率无统计学差异(P＞0.05)。CS作用后,APP/PS1/tau+Vehicle组小鼠的僵直比率显著低于C57+Vehicle 组小鼠(P＜0.01),经过B-GOS干预后均显著上升(P＜0.01)。结论: B-GOS能够较大程度地逆转APP/PS1/tau小鼠的认知行为损伤,并减轻其抑郁情绪。

关键词: 阿尔茨海默病, B-低聚半乳糖, 双歧杆菌属, 认知功能障碍, 抑郁情绪

Abstract: Objective: To investigate the effects of novel BimunoGalactooligosaccharides (B-GOS) on cognitive behavior and depression of APP/PS1/tau Alzheimer's disease transgenic mice. Methods: Five-month-old male APP/PS1/tau AD transgenic mice and C57BL/6J control mice were divide into C57+Vehicle group, C57+B-GOS group, APP/PS1/tau+Vehicle group and APP/PS1/tau+B-GOS group, with 10 mice in each group. After continuous administration of B-GOS for 5 months, the cognitive behavior and depressive mood changes of mice in each group were detected by open field experiment, new object recognition experiment, Y maze experiment, Morris water maze experiment, tail suspension test, forced swimming test and conditioned fear experiment, respectively. Results: ①Open field experiment: the percentage of activity time in the central area of open field in APP/PS1/tau+Vehicle group mice was significantly lower than that in C57+Vehicle group mice (P＜0.01), and was remarkably increased after B-GOS intervention (P＜0.05). ② New object recognition experiment: the new object recognition index (NOI) of APP/PS1/tau+Vehicle group mice was significantly lower than that of C57+Vehicle group mice (P＜0.01), and was observably increased after B-GOS intervention (P＜0.05). ③ Y maze experiment: the spontaneous alternation correct rate of APP/PS1/tau+Vehicle group mice was notably lower than that in C57+Vehicle group (P＜0.01), and was distinctly increased after B-GOS intervention (P＜0.01). ④ Classical water maze experiment: the escape latency of APP/PS1/tau+Vehicle group mice on the 4th and 5th days was significantly longer than that of C57+Vehicle group mice (P＜0.01), which was markedly shortened after B-GOS intervention (P＜0.05). During the space exploration phase, the percentage of swimming time in the target quadrant and the times of crossing the platform in APP/PS1/tau+Vehicle group mice were significantly lower than those in C57+Vehicle group mice (P＜0.01), which were notably increased after B-GOS intervention (P＜0.01). ⑤ Tail suspension test and forced swimming test: the percentage of immobility time in APP/PS1/tau+Vehicle group mice was dramatically higher than that in C57+Vehicle group mice (P＜0.01), and was obviously reduced after B-GOS intervention (P＜ 0.01). ⑥ Conditioned fear experiment: before conditioned stimulus (CS), the freezing ratio of mice in each group had no statistical difference (P＞0.05). After CS, the freezing ratio of APP/PS1/tau+Vehicle group mice was significantly lower than that of C57+Vehicle group mice (P＜0.01), and was notably increased after B-GOS intervention (P＜0.01). Conclusion: B-GOS could reverse the cognitive behavioral impairment of APP/PS1/tau mice and alleviate their depression to a large extent.

Key words: Alzheimer&apos, s disease, Bimuno Galactooligosaccharides, Bifidobacterium, cognitive dysfunction, depression

中图分类号:

R338

杨丹, 乔晶, 王嘉欣, 卫无恙, 赵子鑫, 蔡红艳. B-GOS对阿尔茨海默病转基因小鼠认知行为和抑郁情绪的影响^*[J]. 中国应用生理学杂志, 2021, 37(3): 240-246.

YANG Dan, QIAO Jing, WANG Jia-xin, WEI Wu-yang, ZHAO Zi-xin, CAI Hong-yan. Effects of B-GOS on cognitive behavior and depression of transgenic mice with Alzheimer's disease[J]. CJAP, 2021, 37(3): 240-246.

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B-GOS对阿尔茨海默病转基因小鼠认知行为和抑郁情绪的影响^*

Effects of B-GOS on cognitive behavior and depression of transgenic mice with Alzheimer's disease

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