在非裔男性中,非编码基因变异导致前列腺癌风险更高
Sridhar Hannenhalli1, Shan Li1, Kaniz Fatema1
1National Institutes of Health.
Research square
|December 16, 2024
概括
前列腺癌 (PrCa) 的风险因祖先而异. 新的研究确定了非洲血统男性的特定遗传变异,影响PrCa发育,可能改善风险预测模型.
科学领域:
- 遗传学 是一个遗传学.
- 癌症生物学 癌症生物学
- 生物信息学是一种生物信息学.
背景情况:
- 前列腺癌 (PrCa) 的发病率和严重程度在祖先群体之间存在显著差异.
- 与欧洲血统 (EA) 的男性相比,非洲血统 (AA) 的男性面临 PrCa 诊断和死亡的风险更高.
- 目前的多基因风险评分没有完全捕捉到导致PrCa差异的种群特异性遗传因素.
研究的目的:
- 探索非编码的调控多形态在推动PrCa风险的祖先间变化的作用.
- 确定特定于非洲祖先的基因变异,影响前列腺癌易感性.
- 为PrCa开发一种新的多基因风险评分,包括祖先特定的监管元素.
主要方法:
- 利用基于序列的深度学习模型来分析前列腺调节增强剂.
- 在AA男性中鉴定了单核酸多态 (SNP) 具有更高的替代性基因频率.
- 进行实验验证,以确认已识别的增强剂SNP (eSNP) 对PrCa敏感性的功能影响.
主要成果:
- 在AA男性中确定了大约2000个eSNP,可能会影响增强器功能和PrCa易感性.
- 证明这些eSNP通过包括免疫抑制,端粒延长,脱差和亡抑制在内的机制影响PrCa发育.
- 发现eSNP破坏了关键前列腺转录因子 (例如FOX,AR,HOX家族) 的结合部位.
结论:
- 已识别的eSNP代表了PrCa风险差异的新型遗传贡献者.
- 这些eSNP提供了对祖先特定PrCa发育背后的生物学机制的见解.
- 结合这些eSNP的多基因风险评分可以提高在不同人群中对PrCa风险的评估.
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