基于RNA N6-甲基亚登素修饰的生物标志物用于吸收的电离辐射剂量估计
Hongxia Chen1, Xi Zhao1, Wei Yang2
1State Key Laboratory of Proteomics, National Center for Protein Sciences at Beijing, Beijing Proteome Research Center, Beijing Institute of Radiation Medicine, Beijing, China.
Nature communications
|October 31, 2023
概括
使用RNA N6-甲基氨酸 (m6A) 水平,已经确定了暴露于辐射的新生物标志物. 这些发现支持在放射性事故后和临床放射治疗中改善医疗管理.
科学领域:
- 生物化学 生物化学
- 分子生物学分子生物学
- 辐射生物学 辐射生物学
背景情况:
- 有效的辐射分类和生物剂量测量对于管理在放射性事件中暴露的个体至关重要.
- 准确评估辐射剂量对于及时的医疗干预和治疗计划至关重要.
研究的目的:
- 通过全基因组查N6-甲基氨酸 (m6A) 修饰物来识别辐射暴露的新型RNA生物标志物.
- 评估特定的m6A-修饰的mRNAs作为辐射剂量估计的生物测量仪的潜力.
主要方法:
- 在辐射后对信使RNA (mRNA) 进行全基因组查,以改变N6-甲基氨酸 (m6A) 水平.
- 在小鼠外周血液单核细胞 (PBMC) 中分析m6A水平的Ncoa4,Ate1和Fgf22.
- 在小鼠,子,人类和接受放射治疗的癌症患者中,Ncoa4m6A作为辐射生物标志物的验证.
主要成果:
- 在小鼠PBMC中,Ncoa4,Ate1和Fgf22的m6A水平在照射后表现出显著的剂量反应关系.
- 一种修饰证明了辐射特异性,跨物种保护 (老鼠,子,人类) 和长时间检测,暴露后长达28天.
- 基于Ncoa4m6A的生物测量模型成功构建,用于估计吸收的辐射剂量.
结论:
- RNA m6A的修饰,特别是Ncoa4,显示出作为辐射生物对称的敏感和特定生物标记物的巨大潜力.
- 这些发现支持RNAm6A在管理辐射事故和优化癌症辐射疗法的临床应用.
- 这项研究强调了利用RNAm6A的可行性,以便在各种环境中快速准确地评估辐射剂量.
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