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Updated: Mar 14, 2026

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APOE ε4载体与嗅觉-海马管功能连接相关

Toshikazu Ikuta¹, Taylor Bither²,

¹Department of Communication Sciences and Disorders, School of Applied Sciences, University of Mississippi, PO Box 1848, University, MS, 38677, USA. tikuta@olemiss.edu.

Brain imaging and behavior

|March 13, 2026

概括

由阿波利波蛋白E (APOE) ε4表示的遗传风险与嗅觉通路中的大脑连接性改变有关. 这表明早期的神经退行变化可能可以通过嗅觉-海马体网络功能检测到.

科学领域:

神经科学是一个神经科学.
遗传学遗传学是一个
神经成像是一种神经成像.

背景情况:

嗅觉功能障碍可以在神经退行性疾病的认知衰退之前.
阿波利波蛋白E (APOE) ε4等位基因是神经退行性疾病的重要遗传风险因素.
了解嗅觉通路中的早期神经变化对于预测神经退行至关重要.

研究的目的:

为了研究遗传风险 (APOE ε4) 和嗅觉-海马网络中的功能连接之间的关联.
为了确定遗传风险是否影响特定嗅觉区域 (嗅觉球,通道,皮质皮质) 和海马的连接性.
探索老年人嗅觉-海马脉连接和临床诊断之间的关系.

主要方法:

分析了126名参与者的休息状态功能磁共振成像 (fMRI) 数据.
在海马和嗅觉区域 (前/后皮质皮质,嗅球,嗅道) 之间计算了功能连接.
用多个回归模型来评估连接的预测因素,包括遗传风险 (APOE ε4状态),年龄,性别和临床诊断.

主要成果:

遗传风险 (APOE ε4) 与海马和嗅觉管之间的功能连接性增加有显著的关联.
观测到海马体和嗅球之间增加连接的趋势,但没有达到统计学意义.
在皮质状皮层区域的遗传风险和连接性之间没有发现显著的关联.
临床诊断没有预测任何检查的嗅觉-海马河道的功能连接.

结论:

遗传风险,特别是APOE ε4等位基因,与嗅觉-海马网络的早期功能重组有关,特别是涉及嗅觉通道.
这些发现表明,嗅觉-海马河道可能是神经退行过程的早期指标,独立于临床症状.
该研究强调了针对嗅觉-海马网络的潜力,以早期检测神经退行性脆弱性.

关键词:

在这里,APOEOE是APOE.阿尔茨海默氏症是阿尔茨海默氏症的一种疾病.嗅觉是一种嗅觉.休息状态功能连接功能连接

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