在结直肠癌中,生殖线倾向于瘤性化损伤
medRxiv : the preprint server for health sciences
|July 9, 2025
概括
红肉消费增加了结肠直肠癌 (CRC) 的风险,因为它可能导致RS16906252-T变异携带者中的化DNA损伤. 这种与MGMT修复基因沉默相关的遗传倾向突显了饮食和CRC之间的因果关系.
科学领域:
- 遗传学和癌症生物学
- 分子流行病学分子流行病学
- 营养瘤学 营养瘤学
背景情况:
- 红肉消费是结肠直肠癌 (CRC) 的已知危险因素,与瘤基化DNA损伤增加有关.
- rs16906252-T变体作为cis-eQTL,降低MGMT的调节,MGMT是修复化DNA损伤的关键基因.
- 这表明rs16906252-T载体可能对化剂引起的突变具有更高的敏感性.
研究的目的:
- 调查RS16906252-T变体,化DNA损伤和结直肠癌之间的联系.
- 为了研究红肉消费和RS16906252-T在CRC发展中的相互作用.
- 在CRC.中通过化损害介导的特定突变的识别.
主要方法:
- 来自大型CRC队列 (TCGA,NHS/HPFS,COCA-CN) 的全外基因组测序数据的突变特征解卷.
- 分析rs16906252-T与化依赖性瘤突变之间的关系.
- 调查生活方式数据,特别是红肉摄入量,与rs16906252-T状态相关.
主要成果:
- rs16906252-T载体在CRC患者中显示出显著更高的瘤化损伤.
- 在东亚祖先中,rs16906252-T变异是罕见的,与这些人群中CRC患者的微不足道的化损伤相关.
- KRAS G12D和G13D突变被确定为基化突变特征介导的致癌性的关键驱动因素.
- 观察到rs16906252-T和高红肉摄入量之间对瘤化损伤的协同作用.
结论:
- 携带 rs16906252-T 变异的个体有倾向于在结直肠癌中发生基化损伤.
- 红肉消费加剧了这种倾向,增强了化损伤和CRC风险.
- 这些发现支持红肉和CRC之间的因果关系,为个性化的饮食和查策略铺平了道路.
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