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Updated: Feb 7, 2026

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腹腔大动脉动脉瘤中的表观遗传学:机制和风险预测
medRxiv : the preprint server for health sciences
|February 6, 2026
概括
这项研究确定了与腹腔大动脉瘤 (AAA) 风险相关的DNA甲基化标记物. 这些发现突出了炎症途径,血脂和免疫蛋白作为AAA发展的关键贡献者.
科学领域:
- 遗传学和基因组学 遗传学和基因组学
- 表观遗传学 在表观遗传学中,表观遗传学是指表观遗传学.
- 心血管疾病研究研究
背景情况:
- 影响腹腔大动脉瘤 (AAA) 易感性的表观遗传机制尚不清楚.
- 识别AAA的因果DNA甲基化标记对于理解动脉瘤形成和开发翻译应用至关重要.
研究的目的:
- 使用VA百万退伍军人计划 (MVP) 识别与腹腔大动脉动脉瘤 (AAA) 相关的DNA甲基化生物标志物.
- 阐明驱动AAA发展的潜在分子通路和遗传调节过程.
主要方法:
- 对发生的AAA进行了全表观基因组关联研究 (EWAS).
- 使用孟德尔随机化 (MR) 来推断CpG-AAA关联的因果关系.
- 综合多omics数据,包括转录数据和表达量的特征甲基化 (eQTM),用于途径分析.
- 开发并评估了一种基于甲基化的风险预测模型.
主要成果:
- 确定了1,253个与事件AAA相关的CpG,其中151个由MR支持,被认为是因果关系.
- 功能注释揭示了炎症转录因子程序 (例如,AP-1) 的丰富,主要是远端增强器调节.
- 网络MR涉及231个调解途径,包括心脏代谢特征 (例如血脂) 和免疫/炎症相关特征 (例如血小板计数,特定蛋白质).
- 一个甲基化风险得分提高了AAA预测准确性,当添加到临床模型.
结论:
- 确定了AAA的假定因果DNA甲基化标记物.
- 多omics分析涉及AP-1-链接的炎症程序,血脂,血小板计数和免疫蛋白在AAA病原发生.
- 这些发现提供了有关甲基化相关的AAA风险路径和潜在治疗点的见解.
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