对反应性氧物种的综合性研究为膜光动力学疗法的明确剂量测量
Hongjing Sun1,2, Yihong Ong1, Michele M Kim1
1Department of Radiation Oncology, University of Pennsylvania, Philadelphia, PA 19104, USA.
Antioxidants (Basel, Switzerland)
|January 8, 2025
概括
准确的光动力疗法 (PDT) 剂量测量需要测量组织氧气,而不仅仅是光和光敏剂水平. 这项研究在肺部间皮瘤患者中应用了反应性氧物种显式剂量计 (ROSED),揭示了治疗有效性的显著差异.
科学领域:
- 生物医学工程 生物医学工程
- 摄影化学的使用.
- 在瘤学瘤学.
背景情况:
- 光动力疗法 (PDT) 的有效性取决于光,光敏感剂和氧气来产生活性氧物种 (ROS).
- 目前的PDT剂量测量通常忽略了组织氧化,这是治疗结果的关键因素.
- 准确的剂量测量需要量化所有三个组成部分:光,光敏剂和氧气.
研究的目的:
- 在肺部PDT的临床环境中实施和评估反应性氧物种显式剂量计 (ROSED).
- 评估在接受PDT的多发性间皮瘤患者中ROS产生的异质性.
- 为优化未来PDT协议提供数据,以提高治疗疗效.
主要方法:
- 用扩散相关谱学 (DCS) 来测量瘤血流量,非侵入性地确定组织氧化率.
- ROSED集成测量了光流量,光的度和组织氧化的情况.
- 计算的反应氧物种度 ([ROS]rx) 在多个地点和患者中进行了分析.
主要成果:
- 在[ROS]rx中观察到显著的患者间和患者内异质性,即使在均的光剂量.
- 平均测量的[ROS]rx为0.56 ± 0.26 mM (13名患者,21个地点).
- 计算的平均[ROS]rx为0.48 ± 0.23 mM (20名患者,76个地点).
结论:
- 这是ROSED在多性间皮瘤PDT中的第一个临床分析.
- ROSED显示了ROS产量的大量变化,影响了治疗的统一性.
- 未来的ROSED导向PDT可能通过确保一致的ROS生成来提高治疗疗效.
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