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一个新的简化结构模型,用于准确而灵活地模拟辐射诱导的DNA损伤

Ling Hua¹, Xianghui Kong², Tian Li²

¹Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education/Beijing), Department of Radiation Oncology, Peking University Cancer Hospital & Institute, Beijing 100142, China; Department of Medical Management, Chinese Academy of Science Heavy Ion Medicine (CASHIM) Co. Ltd., Beijing 100083, China.

Computer methods and programs in biomedicine

|October 18, 2025

概括

一个新的,灵活的DNA模型准确计算了辐射诱导的双链断裂 (DSB) 产量. 这种简化的模型通过改进在各种条件下对DNA损伤的模拟来增强放射生物学的研究.

科学领域:

辐射生物学辐射生物学
计算生物物理学的计算生物物理.
模拟DNA损伤的模型

背景情况:

对DNA损伤的准确建模对于理解辐射效应至关重要.
现有的模型在预测双链断裂 (DSB) 产量方面可能缺乏灵活性或准确性.
电离辐射带来风险,需要精确的剂量测量和生物效应预测.

研究的目的:

提出和验证一个简化,灵活的DNA模型来计算辐射诱导的DSB产量.
为了提高DSB在各种辐射类型和能量中的产量预测的准确性.
提供适用于放射生物研究和辐射保护的工具.

主要方法:

通过分离宏观和微观空间结构,开发了一种新的核DNA模型.
将模型集成到基于GPU的gMicroMC代码框架中.
使用模拟的DSB产生的DNA二面角从KX射线中优化,并与电子和质子的实验数据进行验证.

主要成果:

为DNA模型确定了49°的最佳二面角.
对4.5keV电子的模拟DSB产量显示,与实验数据的差异为1.6%.
该模型与对质子 (1 MeV到20 MeV) 的实验和计算的DSB产量具有很高的一致性.

结论:

拟议的DNA模型提供了一种灵活而准确的方法来模拟辐射诱导的DNA损伤.
该模型的准确性在不同的辐射类型和能量中得到了验证.
这种简化的DNA模型对推进放射生物学的研究具有重大潜力.

关键词:

模拟DNA损伤的模型基因结构建模DNA结构建模 DSB的收益率是什么蒙特卡洛模拟的蒙特卡洛模拟放射治疗疗法放射治疗疗法

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