多祖先转录全组关联研究揭示了乳腺癌遗传学和生物学方面的新见解
medRxiv : the preprint server for health sciences
|August 20, 2025
概括
这项研究使用了跨不同祖先的全转录组关联研究 (TWAS) 来确定与乳腺癌风险相关的290个基因. 许多这些基因为乳腺癌的遗传学和生物学提供了新的见解.
科学领域:
- 遗传学
- 基因组学
- 癌症生物学
背景情况:
- 全基因组关联研究 (GWAS) 已经确定了许多乳腺癌遗传风险位点,但具体的目标基因通常是未知的.
- 在了解乳腺癌易感性的功能遗传基础方面存在重大知识差距.
研究的目的:
- 使用多祖先转录组广泛关联研究 (TWAS) 发现新的乳腺癌易感基因.
- 识别与乳腺癌风险相关的基因,包括与已知的风险变体独立的基因和基于雌激素受体状态的基因.
主要方法:
- 开发并验证了652名女性正常乳腺组织数据的基因表达,拼接和多化特异性遗传模型.
- 将这些模型应用于大型GWAS数据 (178,534例,248,300对照) 进行关联分析.
- 使用单细胞RNA测序和体外实验进行功能验证.
主要成果:
- 确定了290个与乳腺癌风险相关的基因,其中103个是新的TWAS发现,46个远离已知的风险变异.
- 根据雌激素受体状态发现了39个基因.
- 在关键途径中发现丰富,包括同源重组,亡,p53,PI3K/AKT/mTOR,雌激素和IL-2/STAT5信号. 功能证据支持169个基因.
结论:
- 发现了大量候选乳腺癌易感基因,大大提高了对其遗传结构的理解.
- 提供了对乳腺癌发展和进展的分子机制的宝贵见解.
- 强调多祖先TWAS在复杂疾病的基因发现中的重要性.
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