使用基于纳米粒子的药物输送方法增强冠状癌的质子辐射敏感性:对高能和低能质子进行比较研究
Mihaela Tudor1,2, Roxana Cristina Popescu1,3, Ionela N Irimescu4
1Department of Life and Environmental Physics, Horia Hulubei National Institute of Physics and Nuclear Engineering, Reactorului 30, P.O. Box MG-6, 077125 Magurele, Romania.
International journal of molecular sciences
|November 9, 2024
概括
将多克索鲁比载荷的氧化铁纳米颗粒 (IONPDOX) 与质子辐射疗法结合起来,可以增强软骨肉瘤 (CHS) 治疗. 这种方法增加了癌细胞死亡和DNA损伤,为管理CHS提供了一个有希望的策略.
科学领域:
- 生物医学工程 生物医学工程
- 纳米技术 纳米技术
- 辐射瘤学 辐射瘤学
背景情况:
- 软骨肉瘤 (CHS) 对常规化疗和放射治疗表现出显著的耐药性.
- 开发新的治疗策略对于改善CHS患者治疗结果至关重要.
研究的目的:
- 为了研究多克索鲁比载荷铁氧化物纳米粒子 (IONPDOX) 与质子辐射疗法结合用于冠状腺癌治疗的协同效应.
- 评估IONPDOX对质子治疗在细胞存活和DNA损伤方面的疗效的影响.
主要方法:
- 使用聚乙烯糖醇封装的氧化铁纳米粒子 (IONPs) 进行多克索鲁比的输送.
- 经过治疗的人类软骨肉瘤 (SW1353) 细胞和3D球形,具有不同线性能量转移 (LET) 的质子,有或没有IONPDOX.
- 通过clonogenic assays评估细胞存活率和通过微核 (MN) 和γH2AX焦点形成的基因毒性.
- 使用增强的暗场显微镜 (EDFM) 与高光谱成像 (HI) 和SEM-EDX进行了细胞形态和核光谱指纹的特征.
主要成果:
- IONPDOX显著增强了对低LET和高LET的质子辐射的放射敏感性.
- 组合疗法导致DNA损伤增加,由增加的MN和γH2AX焦点证明.
- 与高LET质子相比,IONPDOX-低LET质子组合观察到更明显的细胞毒性作用.
- 超光谱成像揭示了细胞形态和光谱谱的变化,表明了治疗反应的潜在光谱标记.
结论:
- IONPDOX与质子辐射疗法的结合显示出克服冠状肉瘤耐药性的潜力.
- 这种方法通过增加癌细胞死亡和DNA损伤来增强治疗疗效.
- 这些发现表明IONPDOX介导的质子疗法是改善冠状腺癌管理的有希望的策略.
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