在使用向放射性药物治疗中评估辐射诱导的旁观者效应
Rohit Sharma1, Archana Mukherjee2,3, Poonam Jagasia4
1Radiopharmaceuticals Division, Bhabha Atomic Research Centre, Mumbai, 400094, India.
EJNMMI radiopharmacy and chemistry
|November 26, 2025
概括
放射性核酸治疗显示出显著的辐射诱导生物旁观者效应 (RIBBEs),Y-90和Lu-177显示出比I-125更大的毒性. 了解这些旁观者效应对于优化向放射性核素治疗的疗效至关重要.
科学领域:
- 核医学是一种核医学.
- 放射生物学的放射生物学
- 在瘤学瘤学.
背景情况:
- 辐射诱导的生物旁观者效应 (RIBBEs) 在外部光束放射治疗中已知,但在放射性核酸治疗中研究较少.
- 放射性核素疗法越来越多地使用,需要对其相关的旁观者效应进行调查.
研究的目的:
- 在使用不同放射性核酸的向放射性核酸治疗中研究RIBBEs.
- 量化Y-90,Lu-177和I-125发射器对生物的影响.
- 通过了解放射性核酸特异性反应,制定最大化治疗效果的策略.
主要方法:
- 针对HER2的trastuzumab抗体被标记为Y-90,Lu-177和I-125.
- 放射性标记结合物的特性和特异性评估.
- 媒介传输协议用于评估HER2过度表达细胞系的直接和旁观者效应.
主要成果:
- 所有放射性标记配方都诱导了显著的旁观者效应,减少了克隆基因生存率.
- 在HER2过度表达细胞中,Y-90和Lu-177的旁观者毒性比I-125更大.
- 较高剂量的Y-90和Lu-177诱导了亡和亡,与ROS升高,与I-125不同.
结论:
- 放射性核酸治疗中的疗效取决于特定的放射性核酸及其能量概况.
- 这项研究强调了直接和旁观者效应的复杂相互作用.
- 需要对RIBBEs进行进一步的研究,以优化基于放射性核素的癌症疗法.
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