比较祖先标准化方法的跨祖先结肠直肠癌多基因风险评分
Elisabeth A Rosenthal1, Li Hsu2, Minta Thomas2
1Division Medical Genetics, School of Medicine, University of Washington, Seattle, Washington, USA.
Genetic epidemiology
|September 24, 2024
概括
在祖先之间对结直肠癌 (CRC) 的多基因风险评分 (PRS) 的标准化至关重要. 使用祖先多样化的训练集和混合物作为共变量,可以创建可靠的PRSz-score来识别高风险个体.
科学领域:
- 遗传学 遗传学 是一个
- 在瘤学瘤学.
- 人口健康 人口健康
背景情况:
- 大肠直肠癌 (CRC) 具有复杂的遗传和环境风险因素.
- 多基因风险评分 (PRS) 识别具有高遗传风险的个体.
- PRS的分布因祖先而异,需要标准化才能得到公平的应用.
研究的目的:
- 为了比较跨血统CRC PRS的后期标准化方法.
- 评估培训数据和共变量选择对PRS分布的影响.
- 开发一种标准化的PRS,适用于各种祖先群体.
主要方法:
- 利用了来自我们所有人研究计划的全基因组序列数据.
- 对比了四种特设后标准化方法,用于跨血统CRC PRS.
- 对比线性模型训练了整个数据集与多样化的子集,以祖先或混合的主要组成部分作为共变量.
主要成果:
- 所有测试的方法在特定的祖先中都显示出相似的性能.
- 使用祖先多样化的训练子集进行标准化,调整了PRS差异.
- 使用混合物和多样化的训练集,产生了与标准正常分布最接近的PRS分布.
结论:
- 在多样化的种群中训练模型,并使用添加剂作为共变量来标准化PRS.
- 这种标准化产生了可靠的z-score,用于识别CRC高多基因风险的个体.
- 标准化的PRS可以提高全面的风险评估,以便更精确的患者分层.
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