在放射治疗期间,HBOC在大型固体瘤中比普通瘤更强烈地减轻了瘤缺氧
Yingcan Xu1, Kehui Zhu1, Jiakang Wu1
1Institute of Blood Transfusion, Chinese Academy of Medical Sciences, Peking Union Medical College, Chengdu, China.
Artificial cells, nanomedicine, and biotechnology
|November 23, 2023
概括
基于血红蛋白的氧载体 (HBOCs) 缓解瘤缺氧,增强放射治疗的有效性. 这种疗法对较大的固体瘤更有希望,因为更严重的缺氧.
科学领域:
- 在瘤学瘤学.
- 生物医学工程 生物医学工程
- 纳米医学是一种纳米医学.
背景情况:
- 放射治疗 (RT) 的疗效受到瘤缺氧和辐射抵抗的限制.
- 缺氧诱导因子-1α (Hif-1α) 在瘤辐射抵抗中起着关键作用.
- 基于血红蛋白的氧载体 (HBOCs) 是纳米氧载体,具有克服瘤缺氧的潜力.
研究的目的:
- 为了研究HBOCs在结合分成RT对固体瘤的疗效.
- 评估HBOCs对瘤缺氧和Hif-1α表达的影响.
- 为了确定HBOC敏感化疗法在正常或大型瘤中是否更有效.
主要方法:
- 在裸体小鼠中,向Miapaca-2和Hela细胞异种移植物注入了与HBOC结合的分离RT.
- 评估瘤缺氧,Hif-1α表达,瘤扩散和转移.
- 在正常 (100 mm3 ) 和大 (360/400 mm3 ) 瘤中比较治疗疗效.
主要成果:
- 在正常和大型瘤中,HBOCs缓解了瘤缺氧和降低了Hif-1α表达的调节.
- 瘤扩散和转移在HBOC应用后减少.
- 与HBOCs相结合的RT显示,与普通瘤相比,在大型瘤中瘤生长抑制更大.
结论:
- HBOC的使用有效地减轻了瘤缺氧,并提高了RT的疗效.
- 由于更严重的缺氧,HBOC敏感化疗法特别适用于大型固体瘤.
- HBOCs是改善癌症放射治疗结果的有希望的策略.
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