用6MV线性加速器光子诱导不稳定的染色体异常的剂量反应曲线:对实验内部变化的分析
Volodymyr Vinnikov1, Dominika Kochanova1, Katarína Vigašová1
1Department of Radiobiology, Cancer Research Institute, Biomedical Research Centre of Slovak Academy of Science, Bratislava, Slovak Republic, BMC SAV, Dúbravská Cesta 9, Bratislava 84505, Slovak Republic.
概括
本研究建立了使用二心分析的细胞遗传生物测量剂量反应曲线 (DRC). 它证实,培养条件不会显著影响辐射剂量估计,这对于辐射应急响应至关重要.
科学领域:
- 辐射生物学 辐射生物学
- 细胞遗传学 细胞遗传学
- 生物测量仪是生物测量仪.
背景情况:
- 细胞遗传生物对称需要对各种辐射类型准确的剂量反应曲线 (DRC).
- 二中心测定是评估辐射暴露的标准方法.
研究的目的:
- 使用二心分析,构建和验证用于6 MV linac光子的DRC.
- 调查延迟的线粒体刺激和长时间的线粒体停止对DRCs的影响.
- 在验证研究中评估组合DRC用于剂量估计的准确性.
主要方法:
- 用6 MV linac光子对人体淋巴细胞样本进行辐射.
- 淋巴细胞培养与各种延迟的线粒体刺激和线粒体停止.
- 在基相细胞中对染色体异常 (二心,中心环) 的评分.
- 使用线性二次模型安装DRC,并通过盲目的剂量估计进行验证.
主要成果:
- 对二心环和中心环的DRC使用线性-正方形模型成功安装.
- 长期的线粒体停止和延迟的线粒体刺激都没有影响到刚果民主共和国.
- 延迟的线粒体刺激增加了第二个分裂元相的产量.
- 组合的DRC提供了准确的剂量估计,可与个人或特定培养的DRC相比较.
- DRC系数高于之前的 linac 束研究,但与正电压X射线相似.
结论:
- 已建立的DRC是强大的,并且不受培养时间的常见变化的显著影响.
- 经过6 MV linac光子暴露后,可以可靠地使用通用的DRC进行生物对称.
- 实验条件的标准化对于未来对大电压辐射束的研究至关重要.
更多相关视频
06:20Irradiator Commissioning and Dosimetry for Assessment of LQ α and β Parameters, Radiation Dosing Schema, and in vivo Dose Deposition
Published on: March 11, 2021
7.2K
08:18Application of Laser Micro-irradiation for Examination of Single and Double Strand Break Repair in Mammalian Cells
Published on: September 5, 2017
9.7K
相关概念视频
01:35Mutations
32.9K
Mutations are changes in the sequence of DNA. These changes can occur spontaneously or they can be induced by exposure to environmental factors. Mutations can be characterized in a number of different ways: whether and how they alter the amino acid sequence of the protein, whether they occur over a small or large area of DNA, and whether they occur in somatic cells or germline cells.
Chromosomal Alterations Are Large-Scale Mutations
While point mutations are changes in a single nucleotide in...
Chromosomal Alterations Are Large-Scale Mutations
While point mutations are changes in a single nucleotide in...
32.9K
02:59Biological Effects of Radiation
15.1K
All radioactive nuclides emit high-energy particles or electromagnetic waves. When this radiation encounters living cells, it can cause heating, break chemical bonds, or ionize molecules. The most serious biological damage results when these radioactive emissions fragment or ionize molecules. For example, α and β particles emitted from nuclear decay reactions possess much higher energies than ordinary chemical bond energies. When these particles strike and penetrate matter, they...
15.1K