机器学习多基因风险模型用于增强预测阿尔茨海默病内分类型
Nathaniel B Gunter1, Robel K Gebre1, Jonathan Graff-Radford1
1From the Departments of Radiology (N.B.G., R.K.G., C.R.J., V.J.L., P.V.), Neurology (J.G.-R., D.S.K., R.C.P., V.K.R.), and Quantitative Health Sciences (R.C.P.), Mayo Clinic Rochester, MN; and Departments of Quantitative Health Sciences (M.G.H.), Neuroscience (O.A.R.), and Clinical Genomics (O.A.R.), Mayo Clinic Florida, Jacksonville.
Neurology. Genetics
|January 22, 2024
概括
机器学习多基因风险评分 (ML-PRS) 与传统方法相比,可以更好地预测阿尔茨海默病 (AD) 末型. 这些先进的模型更好地捕捉非线性遗传效应,增强了AD的风险分层.
科学领域:
- 遗传学 是一个遗传学.
- 机器学习 机器学习
- 神经科学是一个神经科学.
背景情况:
- 阿尔茨海默病 (AD) 具有复杂的多基因结构.
- 全基因组关联研究 (GWAS) 识别了与AD易感性相关的序列变异 (SV).
- 传统的多基因风险评分 (PRS) 方法解释了AD风险和内分类型的有限变化.
研究的目的:
- 调查基于机器学习的多基因风险评分 (ML-PRS) 在预测AD方面是否优于标准PRS.
- 评估ML-PRS对AD风险分层的临床实用性.
主要方法:
- 结合了梅奥诊所关于衰老和AD神经影像研究倡议的数据.
- 计算AD PRS使用AD痴呆症GWAS的顶级SV.
- 训练有素的ML模型使用SV基因型,以粉样蛋白PET负担为主要结果.
- 使用交叉验证和换的重要性,比较ML-PRS和标准PRS的性能.
主要成果:
- ML-PRS模型解释了粉样PET负荷 (r2 = 0.28) 比标准PRS (r2 = 0.24) 更大的变化.
- 考虑到非线性遗传影响的ML方法优越.
- 与标准PRS相比,ML-PRS在预测粉样蛋白PET阳性 (AUC = 0.80) 和认知障碍 (AUC = 0.75) 的准确性更高.
结论:
- 通过更好地考虑非线性遗传效应,ML-PRS方法可以提高AD内类型的预测.
- 进一步开发ML-PRS可以提高对AD遗传性的理解,并使更准确的早期风险分层成为可能.
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