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白物质的时间变化在阿尔茨海默病的敲入鼠标模型中

Zachery D Morrissey^1,2,3, Jin Gao^4,5, Aashutosh Shetti³

¹Graduate Program in Neuroscience, University of Illinois Chicago, Chicago, Illinois 60612.

|January 30, 2024

概括

阿尔茨海默病 (AD) 影响白质的完整性. 在小鼠模型中,我们发现大脑结构和寡细胞细胞的变化,这表明中年对于AD干预至关重要.

科学领域:

神经科学是一个神经科学.
神经病理学神经病理学
生物医学成像技术生物医学成像技术

背景情况:

阿尔茨海默病 (AD) 是导致痴呆的主要原因,其特点是神经退行和认知能力下降.
在AD中观察到白质 (WM) 变化,影响神经电路,但它们与年龄相关的轨迹,尤其是早期,仍然不清楚.
了解WM的早期变化对于制定及时的治疗策略至关重要.

研究的目的:

在阿尔茨海默病的小鼠模型中研究白质结构的与年龄相关的变化.
在AD病理学的背景下,探索与白质变化相关的细胞和分子变化.
为了确定潜在的关键时间窗口,用于AD的治疗干预.

主要方法:

利用了携带家族AD突变的APPKI小鼠模型.
在体内进行扩散张力成像 (DTI),以评估白质的完整性.
进行了细胞分析,对基细胞数量和海马体蛋白质组学进行了分析.

主要成果:

在晚年APPKI小鼠中观察到像海马体和前 commissure 这样的区域,减少了分数异位性 (FA),表明WM完整性受到损害.
在中年APPKI小鼠中,在前部指导管和海马体中发现了增加的寡类细胞数量,这是DTI发现之前的结果.
蛋白质组学揭示了海马体中与寡类细胞相关的蛋白质的年龄和基因型相关的变化.

结论:

中年是AD相关白质病理发展的重要时期.
寡细胞的变化发生在疾病过程的早期,在广泛的白质结构损伤之前.
这些发现突出了中年期作为对阿尔茨海默病治疗干预的潜在关键窗口.

关键词:

阿尔茨海默氏症的疾病是阿尔茨海默氏症.应用NL-G-F/NL-G-F 在线在 DTI 中,DTI 是指DTI.骨髓蛋白是什么意思骨髓蛋白是什么意思类质细胞 (Oligodendrocytes) 是一种有机细胞.白质是白色物质的组成部分.

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