计算机断层扫描中的锡预过不会显著改变辐射诱导的基因表达和DNA双链断裂形成
Simone Schüle1,2,3, Carsten Hackenbroch2,3, Meinrad Beer3
1Bundeswehr Institute of Radiobiology Affiliated to the University of Ulm, Munich, Bavaria, Germany.
PloS one
|December 20, 2024
概括
在CT扫描中的锡预过技术不会改变血液细胞中的分子反应. 这种剂量节约方法显示了较低辐射诱导的基因表达变化的趋势,保持了图像质量.
科学领域:
- 医学物理 医学物理
- 分子生物学分子生物学
- 放射学 放射学是一门学科.
背景情况:
- 计算机断层扫描 (CT) 使用锡 (Sn) 预过技术来降低剂量.
- 这项研究评估了暴露于锡预过CT协议的血细胞中的分子生物学反应.
研究的目的:
- 为了研究CT中锡预过对血液细胞的分子生物效应.
- 为了比较DNA双链断裂 (DSB) 诱导和预过和标准CT协议之间的基因表达变化.
主要方法:
- 使用标准 (20 mGy) 和锡预过 (16.5 mGy) CT 协议,对来自6名捐献者的血液进行了ex-vivo辐射.
- 量化γH2AX DNA DSB焦点和辐射诱导基因和微RNA (miRNA) 的差异基因表达 (DGE).
主要成果:
- 观察到EDA2R,DDB2基因表达和DNA DSB焦点的显著增加,但在所有测试的辐射协议中都是类似的.
- 只有在全剂量 (FD) 协议中,FDXR基因才显示出显著的上调.
- 毫米RNA表达没有显著变化;DGE模式在协议中相似,在锡预过低剂量 (LD) 协议中趋向于较低的DGE.
结论:
- 锡预过技术不会诱导转录或转录后基因表达或DNADSB诱导的显著变化.
- 对于锡预过器,观察到一种倾向于减少辐射诱导的DGE变化,这归因于剂量减少.
- 这些发现表明,锡预过技术是CT中可行的剂量节约选择,而不会影响分子反应.
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