在患有直肠癌的患者中,不同的新辅助化疗-放射疗程诱导的淋巴缺血症:骨髓作为危险器官
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Christos Nanos1, Ioannis M Koukourakis2, Admir Mulita1
1Department of Radiotherapy and Oncology, Medical School, Democritus University of Thrace, University Hospital of Alexandroupolis, 68100 Alexandroupolis, Greece.
Current oncology (Toronto, Ont.)
|October 25, 2024
概括
低分离放射治疗 (RT) 方案在治疗直肠癌后显著保持淋巴细胞数量. 将时间校正的正常化总剂量 (NTD-T) 至骨髓 (BM) 降至最低,对于保持抗瘤免疫力至关重要.
科学领域:
- 在瘤学瘤学.
- 辐射瘤学 辐射瘤学
- 免疫学 免疫学 免疫学
背景情况:
- 放射治疗 (RT) 诱导的淋巴缺血可能会损害抗瘤免疫反应.
- 手术前化学放射治疗 (CRT) 是局部晚期直肠癌的标准.
- 免疫疗法已被批准用于不匹配修复缺陷的直肠瘤.
研究的目的:
- 调查不同RT方案对直肠癌患者的淋巴缺血的影响.
- 为了确定骨髓剂量与淋巴细胞计数之间的关系.
- 确定潜在的RT规划约束,以减轻淋巴衰竭.
主要方法:
- 对接受新辅助CRT的98名直肠腺癌患者的回顾性分析.
- 使用VMAT和IMRT技术的四个RT方案的比较.
- 评估淋巴细胞计数 (LCs) 和时间校正的正常化总剂量 (NTD-T) 到骨髓 (BM).
主要成果:
- 与传统方案 (C和D组) 相比,低分成的RT计划 (A组和B组) 导致RT后的LC显著更高.
- 在LCs和NTD-T到BM之间观察到一个反向关联 (p = 0.01).
- 潜在的NTD-T值为30 Gy至BM体积的30%被确定为RT规划约束.
结论:
- 低分化和加速RT方案,以及BM节约技术,可以减少淋巴缺血症.
- 这些策略可能对免疫辐射疗法 (IO-RT) 临床试验的成功至关重要.
- 优化RT规划以限制BM剂量对于保护直肠癌患者的免疫功能至关重要.
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