全表观基因组分析揭示了前列腺癌中辐射诱导毒性风险的潜在生物标志物
Carlos Lopez-Pleguezuelos1,2, Miguel E Aguado-Barrera1,2,3, Ana Carballo-Castro4
1Genetics in Cancer and Rare Diseases Group, Instituto de Investigación Sanitaria de Santiago de Compostela, Santiago de Compostela, Spain.
Clinical epigenetics
|March 6, 2025
概括
血液中的表观遗传生物标志物可以预测前列腺癌患者的严重放射治疗副作用. 这项研究确定了关键的甲基化模式,为个性化治疗策略铺平了道路.
科学领域:
- 在瘤学瘤学.
- 表观遗传学 在表观遗传学中,表观遗传学是指表观遗传学.
- 放射基因组学是指放射基因组学.
背景情况:
- 前列腺癌是全球领先的癌症,放射治疗 (RT) 是主要的治疗方法.
- 长期RT的副作用显著影响患者的生活质量.
- 对于前列腺癌中RT诱导毒性的外周血液生物标志物仍未得到充分研究.
研究的目的:
- 确定外周血液DNA甲基化生物标志物,用于预测前列腺癌患者在RT后的严重晚期毒性.
- 探索全表观基因组关联研究 (EWAS) 对个性化辐射瘤学的潜力.
- 发现RT反应和毒性背后的分子机制.
主要方法:
- 使用Illumina甲基化EPIC BeadChip对105名前列腺癌患者进行的全表观基因组关联研究 (EWAS) (52例有毒性,53例对照).
- 构建甲基化风险得分 (MRSites,MRSregions) 和支持矢量机 (SVMsites) 的签名.
- 分析RT对生物年龄和随机表观遗传突变的影响;基因本体学和通路丰富分析.
主要成果:
- 确定了56个不同甲基化位置和6个与特定基因和基因组区域相关的不同甲基化区域.
- MRSsites (AUC=0.87),MRSregions (AUC=0.89),和SVMsites (AUC=0.98) 在对患者进行分类时表现出高准确度.
- 丰富分析揭示了重要的途径,包括DNA修复,炎症反应,组织修复和氧化应激.
结论:
- 周围血液中的表观遗传生物标志物显示出预测前列腺癌中严重的长期RT不良影响的前景.
- 识别的甲基化模式为毒性机制提供了洞察力,支持个性化治疗方法.
- 在独立的队列中进一步验证对于临床适用性至关重要.
相关概念视频
Cancer Prevention
Several factors can increase the risk of cancer in an individual. About 50% of cancer cases can be prevented by adopting a healthy lifestyle, regular exercise, eating healthy, and following a modest cancer prevention diet. Epidemiological studies have consistently shown that populations with vegetable and fruit-rich diets have reduced the incidence of cancer. On the other hand, populations who have a diet rich in animal fat, red meat, junk food, or high calories are predisposed to cancer.
Some...
Some...
Mutagenicity and Carcinogenicity
Mutagenicity and carcinogenicity refer to the ability of drugs to cause genetic defects and induce cancer, respectively. The International Agency for Research on Cancer (IARC) classifies agents into four groups based on their carcinogenic potential. Group 1 agents are known human carcinogens; group 2A agents are probably carcinogenic to humans; group 3 agents lack data to support their role in carcinogenesis; and group 4 includes agents for which data support that they are not likely to be...


