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一种灵活的半自动测试,用于评估小鼠肠道中的辐射敏感性和毒性

Anam Nan Nan Liu¹, Jennifer Hazel Elizabeth Baker¹, Alastair Hugh Kyle¹

¹Department of Integrative Oncology, Radiation Biology Unit, BC Cancer Research Institute, Vancouver, Canada.

Anticancer research

|June 26, 2024

概括

这项研究开发了一种新的测定方法,用于测量辐射后的肠道毒性. 该试验评估细胞增殖,小结构和DNA损伤,提供快速和客观的结果.

科学领域:

辐射生物学辐射生物学
胃肠道毒理学胃肠道毒理学
生物医学成像分析分析

背景情况:

肠道毒性是放射治疗的重要副作用之一.
准确评估辐射引起的肠损伤对于治疗计划和患者护理至关重要.
现有的肠道毒性测定可能是耗时和主观的.

研究的目的:

开发一种增强的肠道毒性试验.
试验应提供三个不同的输出:增殖,小形态和DNA损伤.
为了实现快速,全面和客观的数据生成.

主要方法:

在不同的剂量全身X射线照射后,从小鼠收集了关组织细分.
组织被冷保存,并通过免疫组织化学染色来检测扩散 (EdU),血管系统 (CD31) 和DNA损伤 (γH2AX).
开发了一种半自动图像分析软件来量化这些参数.

主要成果:

观察到扩散模式 (损伤,修复,超扩散,静止),时间取决于辐射剂量.
在辐射后48小时确定了扩散的剂量反应曲线.
维里长度和DNA损伤 (γH2AX强度) 在特定时间点 (分别为3.5天和1小时) 显示了剂量依赖的反应.

结论:

开发的测定方法对于评估辐射诱导的肠道损伤具有灵活性.
它允许在定义的时间点客观量化增殖,小长度和DNA损伤.
软件辅助分析显著减少了测试周转时间,为评估肠道毒性提供了更有效的方法.

关键词:

造成的DNA损伤是DNA损伤.辐射辐射辐射辐射辐射辐射辐射测试增强剂测试增强剂肠道毒性肠道毒性它们的扩散和扩散.半自动化半自动化皮的形态学皮的形态学

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