用于放射生物模拟的相间细胞核的聚合物物理模型
Man Zhao1, Guomin Huang2, Zi Xu1
1National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital and Shenzhen Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Shenzhen, 518116, People's Republic of China.
Scientific reports
|February 9, 2026
概括
这项研究使用聚合物物理学来模拟3D染色体架构,以预测DNA损伤和染色体异常. 新模型精确模拟了辐射效应,改善了放射生物学的预测.
科学领域:
- 计算生物学 计算生物学
- 结构生物学 结构生物学
- 放射生物学的放射生物学
背景情况:
- 先进的成像和染色体构造捕获 (Hi-C) 提供了对染色体结构的洞察.
- 将这些见解整合到放射生物学建模中仍然是一个挑战.
- 现有的模型在计算成本和准确性方面扎.
研究的目的:
- 开发一种基于聚合物物理的模型,用于模拟3D染色体结构和染色体异常.
- 将模型与实验放射生物学数据进行基准测试.
- 弥合结构生物学和放射生物学模拟,以改善DNA损伤预测.
主要方法:
- 利用聚合物物理原理来描述染色体和染色质相互作用.
- 采用多阶段放松策略来管理计算成本.
- 实现了以距离为依赖的DNA末端重合模型和图形理论用于异常模拟.
主要成果:
- 成功复制了3D染色体架构 (领土,分区,域,循环).
- 预测的接触地图和概率与高温测量结果一致.
- 对二心,缺失和总异常的模型预测与对玛射线和α粒子的实验数据的20%内对齐.
结论:
- 聚合物物理模型准确地模拟了染色质组织和辐射诱导的染色体异常.
- 该模型显示了与以前的方法相比显著的改进,对实验和模拟数据进行了调整.
- 这种方法在预测DNA损伤和增强放射生物模拟方面具有很大的潜力,特别是在高LET辐射效应方面.
相关概念视频
Interphase
212.7K
The cell cycle occurs over approximately 24 hours (in a typical human cell) and in two distinct stages: interphase, which includes three phases of the cell cycle (G1, S, and G2), and mitosis (M). During interphase, which takes up about 95 percent of the duration of the eukaryotic cell cycle, cells grow and replicate their DNA in preparation for mitosis.
212.7K
Interphase
8.9K
The cell cycle occurs over approximately 24 hours (in a typical human cell) and in two distinct stages: interphase, which includes three phases of the cell cycle (G1, S, and G2), and mitosis (M). During interphase, which takes up about 95 percent of the duration of the eukaryotic cell cycle, cells grow and replicate their DNA in preparation for mitosis.
Phases of Interphase
Following each period of mitosis and cytokinesis, eukaryotic cells enter interphase, during which they grow and replicate...
Phases of Interphase
Following each period of mitosis and cytokinesis, eukaryotic cells enter interphase, during which they grow and replicate...
8.9K
The Nucleus
104.8K
The nucleus is a membrane-bound organelle that acts as a control center in a eukaryotic cell. It contains chromosomal DNA, which controls gene expression and precisely regulates the production of proteins within the cell. In contrast, the DNA inside the mitochondria and chloroplast only carries out functions that are specific to those organelles.
Arrangement of DNA within Nucleus
The regulation of gene expression inside the nucleus is dependent on many factors, including the DNA structure. The...
Arrangement of DNA within Nucleus
The regulation of gene expression inside the nucleus is dependent on many factors, including the DNA structure. The...
104.8K
The Nucleus
7.6K
The nucleus is a membrane-bound organelle that acts as a control center in a eukaryotic cell. It contains chromosomal DNA, which controls gene expression and precisely regulates the production of proteins within the cell. In contrast, the DNA inside the mitochondria and chloroplast only carries out functions that are specific to those organelles.
Arrangement of DNA within Nucleus
The regulation of gene expression inside the nucleus is dependent on many factors, including the DNA structure. The...
Arrangement of DNA within Nucleus
The regulation of gene expression inside the nucleus is dependent on many factors, including the DNA structure. The...
7.6K
Polymers
41.1K
The word polymer is derived from the Greek words “poly” which means “many” and “mer” which means “parts”. Polymers are long chains of molecules composed of repeating units of smaller molecules, known as monomers. They either occur naturally, such as DNA and proteins, or can be constructed synthetically, like plastics. They have varied structural characteristics, such as linear chains, branched chains, or complex networks, that contribute to the...
41.1K
Physical and Chemical Properties of Matter
167.1K
The characteristics that enable us to distinguish one substance from another are called properties.
167.1K


