来自南亚血统人口的假定乳腺癌风险变体在公共变体分类数据库中代表性不足
Raveen Rony1,2,3, Shenglong Deng2, Sarah Yang1,4
1Peter MacCallum Cancer Centre, Melbourne, VIC, Australia.
Breast cancer research : BCR
|January 14, 2026
概括
基因组数据主要来自欧洲人群,限制了其他国家发现乳腺癌风险变异. 南亚人群显示出最大的知识差距,许多私有变体未在ClinVar.Var.中报告.
科学领域:
- 基因组学就是基因组学.
- 人口遗传学 人口遗传学
- 癌症遗传学 癌症遗传学
背景情况:
- 大多数基因组数据来自欧洲祖先,为其他人口创造了知识差距.
- 这种差异阻碍了对非欧洲人群中乳腺癌等疾病遗传遗传风险因素的理解.
研究的目的:
- 量化非欧洲人口报告的乳腺癌遗传风险变异的缺陷.
- 具体来说,为了比较ClinVar报告不同祖先的种群特定变异的报道率.
主要方法:
- 在使用gnomAD v4数据的9个乳腺癌风险基因中确定了特定人群的蛋白质编码变异 (SNP和indels).
- 对比了ClinVar报告的这些变异在非芬兰欧洲 (NFE),非洲 (AFR),混合美国 (AMR),东亚 (EAS) 和南亚 (SAS) 人口中所占比例.
- 评估报告差异的统计学意义.
主要成果:
- 南亚 (SAS) 人口表现出最大的知识赤字,43.4%的私有变体未在ClinVar中报告,而其他群体的20-30%.
- 与NFE相比,PALB2,ATM和BRCA2的SAS变异报告显著减少.
- 值得注意的是,未报告的SAS变异中很大一部分是蛋白质削减或高度致病的误解变异,这表明了新的风险等位基因.
结论:
- 南亚人群中的乳腺癌风险变体在ClinVar中不足.
- 解决南亚变种报告障碍对于减少这一知识差距和改善全球乳腺癌风险评估至关重要.
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