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A Mathematical Radiobiological Model (MRM) to Predict Complex DNA Damage and Cell Survival for Ionizing Particle Radiations of Varying Quality

机译:一种数学辐射生物学模型(MRM)以预测相应质量的电离颗粒辐射的复杂DNA损伤和细胞存活

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摘要

Predicting radiobiological effects is important in different areas of basic or clinical applications using ionizing radiation (IR); for example, towards optimizing radiation protection or radiation therapy protocols. In this case, we utilized as a basis the ‘MultiScale Approach (MSA)’ model and developed an integrated mathematical radiobiological model (MRM) with several modifications and improvements. Based on this new adaptation of the MSA model, we have predicted cell-specific levels of initial complex DNA damage and cell survival for irradiation with 11Β, 12C, 14Ν, 16Ο, 20Νe, 40Αr, 28Si and 56Fe ions by using only three input parameters (particle’s LET and two cell-specific parameters: the cross sectional area of each cell nucleus and its genome size). The model-predicted survival curves are in good agreement with the experimental ones. The particle Relative Biological Effectiveness (RBE) and Oxygen Enhancement Ratio (OER) are also calculated in a very satisfactory way. The proposed integrated MRM model (within current limitations) can be a useful tool for the assessment of radiation biological damage for ions used in hadron-beam radiation therapy or radiation protection purposes.
机译:预测使用电离辐射(IR)的基础或临床应用的不同领域是重要的。例如,朝向优化辐射保护或放射治疗方案。在这种情况下,我们用作“多尺度方法(MSA)”模型,并开发了具有多种修改和改进的集成数学辐射生物学模型(MRM)。基于这种新的MSA模型的新改编,我们通过仅使用仅使用三个输入参数,预测初始复合DNA损伤和细胞存活的细胞特异性初始复合DNA损伤和细胞存活率(颗粒的让和两个细胞特异性参数:每个细胞核的横截面积及其基因组大小)。模型预测的生存曲线与实验结果吻合良好。颗粒相对生物效率(RBE)和氧气增强比(OER)也以非常令人满意的方式计算。拟议的集成MRM模型(在当前限制内)可以是评估HADRON光束放射治疗或辐射保护目的的离子的辐射生物损伤的有用工具。

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