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A two-mutation model of radiation-induced acute myeloid leukemia using historical mouse data

机译:使用小鼠历史数据的辐射诱发的急性髓细胞白血病的两个突变模型

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摘要

From studies of the atomic bomb survivors, it is well known that ionizing radiation causes several forms of leukemia. However, since the specific mechanism behind this process remains largely unknown, it is difficult to extrapolate carcinogenic effects at acute high-dose exposures to risk estimates for the chronic low-dose exposures that are important for radiation protection purposes. Recently, it has become clear that the induction of acute myeloid leukemia (AML) in CBA/H mice takes place through two key steps, both involving the Sfpil gene. A similar mechanism may play a role in human radiation-induced AML. In the present paper, a two-mutation carcinogenesis model is applied to model AML in several data sets of X-ray- and neutron-exposed CBA/H mice. The models obtained provide good fits to the data. A comparison between the predictions for neutron-induced and X-ray-induced AML yields an RBE for neutrons of approximately 3. The model used is considered to be a first step toward a model for human radiation-induced AML, which could be used to estimate risks of exposure to low doses.
机译:根据对原子弹幸存者的研究,众所周知,电离辐射会导致多种形式的白血病。但是,由于该过程背后的具体机制仍然未知,因此很难将急性高剂量暴露的致癌作用外推至对于辐射防护目的很重要的慢性低剂量暴露的风险估计。最近,已经清楚的是,通过两个关键步骤在CBA / H小鼠中诱发急性髓细胞性白血病(AML),这两个步骤均涉及Sfpil基因。类似的机制可能在人类辐射诱发的AML中起作用。在本文中,在两个暴露于X射线和中子的CBA / H小鼠的数据集中,应用双突变致癌模型对AML进行建模。获得的模型与数据非常吻合。将中子诱发和X射线诱发AML的预测结果进行比较,得出中子的RBE约为3。所使用的模型被认为是迈向人类辐射诱发AML模型的第一步,该模型可用于估计低剂量暴露的风险。

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