在已完成的临床试验中,针对阿尔茨海默氏症亚型的知识导向深度时间聚类
medRxiv : the preprint server for health sciences
|October 24, 2023
概括
研究人员开发了一种新的深度学习框架,以识别不同的阿尔茨海默病 (AD) 亚型. 这种方法揭示了三个具有独特进展模式的患者群体,有助于针对神经退行性疾病的个性化治疗策略.
科学领域:
- 神经退行性疾病 神经退行性疾病
- 计算生物学 计算生物学
- 临床信息学 临床信息学
背景情况:
- 阿尔茨海默病 (AD) 呈现出异质的患者进展,使治疗策略复杂化.
- 现有的AD亚型分类方法缺乏细粒度以捕捉动态疾病轨迹.
- 了解AD异质性对于开发有效的个性化干预措施至关重要.
研究的目的:
- 开发和验证一种用于识别不同阿尔茨海默病 (AD) 患者亚型的新型框架.
- 为了测试这种假设,即阿尔茨海默病患者可以根据疾病进展的差异分为子组.
- 为了利用深度学习和临床数据进行强大的AD亚型分类.
主要方法:
- 开发了一个以知识为导向的深度时间聚类 (KG-DTC) 框架,集成自动编码器,k-means聚类和临床结果分类.
- 利用了来自三项solanezumab临床试验 (EXPEDITION,EXPEDITION2,EXPEDITION3) 的2,087名AD患者的安慰剂数据.
- 集群表示包括人口统计,APOE基因型,认知评估,大脑体积和使用高斯混合模型的生物标志物.
主要成果:
- 在结果预测和集群方面,KG-DTC框架取得了高绩效,在与k-means集群损失相结合时显示出优越的结构.
- 外部验证证实了一致的集群结果,为三个集群提供了0.33的轮得分.
- 确定了三种不同的AD亚型 (S1,S2,S3) 具有独特的认知功能模式,神经退行和粉样β水平.
- 与其他亚型相比,亚型3 (S3) 的认知能力下降显著更快 (p<.001).
结论:
- 新的KG-DTC框架成功地根据疾病进展确定了不同的阿尔茨海默病亚型.
- 鉴定出的亚型表现出不同的临床和生物标志物概况,突出显示了患者的异质性.
- 这种方法为了解治疗结果的变化和个性化AD治疗策略提供了有希望的见解.
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