Impaired Spatial Reorientation in the 3xTg-AD Mouse Model of Alzheimer’s Disease

Impaired Spatial Reorientation in the 3xTg-AD Mouse Model of Alzheimer’s Disease
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阿尔茨海默病 3xTg-AD 小鼠模型中的空间重定向受损

DOI:
10.1038/s41598-018-37151-z
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发表时间:
2019
期刊:
影响因子:
4.6
通讯作者:
Stimmell, A.C.
Stimmell, A.C.
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Stimmell, A.C.

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在早期阿尔茨海默病 (AD) 中,空间导航功能受损;然而,造成这种损害的确切原因尚不清楚。最近的证据表明,迷路是 AD 中首先出现的障碍之一。迷路可能代表着未能利用远端线索在空间中确定方向。因此,我们着手在淀粉样变性小鼠模型 (3xTg-AD) 中寻找空间定向远端线索使用受损的情况。为此,我们训练小鼠穿梭到轨道末端,然后返回封闭的启动箱以获得水奖励。然后,训练小鼠停在未标记的奖励区域以接受大脑刺激奖励。在整个训练过程中,留在该区域以获得奖励所需的时间有所增加,并且每次试验的赛道都被放置在随机的起始位置。我们发现 6 个月的雌性 3xTg-AD 小鼠受损,但 3 个月的雌性、6 个月的雄性或 12 个月的雄性小鼠则没有。 6个月大的雄性和雌性小鼠仅具有细胞内病理学,而雄性小鼠具有较少的病理学,特别是在背侧海马体中。因此,AD 可能会因地标使用受损而导致空间定向障碍。
In early Alzheimer’s disease (AD) spatial navigation is impaired; however, the precise cause of this impairment is unclear. Recent evidence suggests that getting lost is one of the first impairments to emerge in AD. It is possible that getting lost represents a failure to use distal cues to get oriented in space. Therefore, we set out to look for impaired use of distal cues for spatial orientation in a mouse model of amyloidosis (3xTg-AD). To do this, we trained mice to shuttle to the end of a track and back to an enclosed start box to receive a water reward. Then, mice were trained to stop in an unmarked reward zone to receive a brain stimulation reward. The time required to remain in the zone for a reward was increased across training, and the track was positioned in a random start location for each trial. We found that 6-month female, but not 3-month female, 6-month male, or 12-month male, 3xTg-AD mice were impaired. 6-month male and female mice had only intracellular pathology and male mice had less pathology, particularly in the dorsal hippocampus. Thus, AD may cause spatial disorientation as a result of impaired use of landmarks.
DOI: 10.3233/jad-150855
发表时间: 2016-02-09
期刊: Journal of Alzheimer's disease : JAD
影响因子: --
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正常衰老中的海马可塑性和阿尔茨海默病中的可塑性降低。
DOI: 10.1016/s0079-6123(08)61267-4
发表时间: 1990
影响因子: --
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期刊: CEREBRAL CORTEX
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