使用假负控转移学习改善了多基因风险预测
Xinge Jessie Jeng1, Yifei Hu1, Vaishnavi Venkat2
1Department of Statistics, North Carolina State University, Raleigh, North Carolina, United States of America.
PLoS genetics
|November 27, 2023
概括
本研究引入了一个转移学习框架,以提高跨不同祖先背景的多基因风险评分 (PRS) 预测准确性. 该方法提高了计算效率,并减少了过拟合,以获得更可靠的遗传倾向估计.
科学领域:
- 遗传学 是一个遗传学.
- 生物信息学是一种生物信息学.
- 计算生物学 计算生物学
背景情况:
- 多基因风险评分 (PRS) 分析汇总了遗传变异来估计疾病倾向.
- PRS方法经常面临挑战,培训 (基础) 和预测 (目标) 数据集之间的祖先背景不匹配.
- 为了利用各种目标人群的大规模基准数据,需要先进的分析方法.
研究的目的:
- 开发一个转移学习框架,用于准确的PRS预测,使用来自潜在不同祖先背景的数据库的知识.
- 提高PRS模型培训的计算和统计效率.
- 提高跨数据预测的准确性,减轻因祖先异质性而产生的问题.
主要方法:
- 建议采用两步转移学习方法,将基准数据的GWAS总结统计数据视为预训练模型知识.
- 步骤1:假负控制 (FNC) 边际选用于从基数据中提取相关知识.
- 步骤2:联合模型培训将基础数据的知识与预测的目标培训数据集成在一起.
主要成果:
- 拟议的框架大大提高了联合模型培训中的计算和统计效率.
- 这种方法有效地缓解了PRS分析中常见的过拟合问题.
- 精确的跨数据预测是容易的,即使在基础和目标数据集之间存在大量异质性.
结论:
- 转移学习框架为跨不同祖先群体的PRS预测提供了一个强大的解决方案.
- 这种方法提高了大规模基因组数据集的实用性,用于个性化风险预测.
- 这种方法显示出在遗传流行病学和精准医学中更广泛应用的潜力.
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