急性缺氧不会改变瘤对FLASH辐射治疗的敏感性
Ron J Leavitt1, Aymeric Almeida1, Veljko Grilj2
1Radiation Oncology Laboratory, Department of Radiation Oncology, Lausanne, University Hospital and University of Lausanne, Lausanne, Switzerland.
International journal of radiation oncology, biology, physics
|February 22, 2024
概括
即使在低氧条件下,FLASH放射疗法也保持了其瘤杀伤效果,克服了治疗耐药性. 这种方法比传统的辐射疗法有好处,特别是在抗辐射瘤方面.
科学领域:
- 在瘤学瘤学.
- 辐射瘤学 辐射瘤学
- 癌症生物学 癌症生物学
背景情况:
- 瘤缺氧是导致对常规剂量速率 (CONV) 放射治疗耐药性的重要因素.
- 了解缺氧对新型辐射技术的影响对于改善癌症治疗结果至关重要.
研究的目的:
- 评估超高剂量率 (FLASH) 辐射疗法在克服缺氧介导的瘤抵抗方面的疗效.
- 在低氧条件下比较FLASH与CONV辐射疗法的有效性.
主要方法:
- 在小鼠中建立了皮下瘤模型 (质母细胞瘤,头癌,肺腺癌).
- 瘤接受了单个20-Gy分数,使用CONV或FLASH辐射.
- 分析了瘤的氧气张力,生长和分子形状 (RNAseq,皮莫尼达);在GBM模型中,用特拉美提尼布抑制了糖解.
主要成果:
- 与CONV辐射不同,FLASH辐射疗法在缺氧瘤中显示出显著的抗瘤疗效.
- 分子分析揭示了质母细胞瘤中的FLASH特异性变化,包括细胞循环停止和代谢转向糖解.
- 用特拉美提尼布抑制糖解增强了在正常和缺氧条件下FLASH的疗效.
结论:
- 闪光辐射疗法在克服缺氧诱导的抗性方面是有效的,比CONV辐射具有优势.
- 这些发现凸显了FLASH放射治疗的潜力,作为对抗辐射瘤更有效的治疗方式.
相关概念视频
02:49Cancer Therapies
7.7K
Cancer therapies are various modes of treatment, such as surgery, radiation therapy, and chemotherapy that are administered to cancer patients.
However, cancer treatments can pose several challenges, as therapies used to kill cancer cells are generally also toxic to normal cells. Moreover, cancer cells mutate rapidly and can develop resistance to chemical agents or radiation therapy. Besides, all types of cancer cells may not respond to the same therapy. Some cancer cells respond to one...
However, cancer treatments can pose several challenges, as therapies used to kill cancer cells are generally also toxic to normal cells. Moreover, cancer cells mutate rapidly and can develop resistance to chemical agents or radiation therapy. Besides, all types of cancer cells may not respond to the same therapy. Some cancer cells respond to one...
7.7K
02:53Adaptive Mechanisms in Cancer Cells
5.8K
Cancer cells accumulate genetic changes at an abnormally rapid rate due to the defects in the DNA repair mechanisms. From an evolutionary perspective, such genetic instability is advantageous for cancer development. Mutant cell lines accumulate a series of beneficial mutations that contribute to their progression into cancer.
Some of the advantages that cancer cells have on normal cells include - enhanced ability to divide without terminally differentiating, induce new blood vessel formation,...
Some of the advantages that cancer cells have on normal cells include - enhanced ability to divide without terminally differentiating, induce new blood vessel formation,...
5.8K