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癌症干细胞为导向的表面自组装,以战胜辐射电阻
Qian Wang1, Hongmei Cao1, Xiaoxue Hou1
1Key Laboratory of Radiopharmacokinetics for Innovative Drugs, Chinese Academy of Medical Sciences, Tianjin Key Laboratory of Radiation Medicine and Molecular Nuclear Medicine, Institute of Radiation Medicine, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin, 300192, China.
Advanced materials (Deerfield Beach, Fla.)
|June 8, 2023
概括
这项研究开发了一种有针对性的药物输送系统,以克服癌症干细胞 (CSCs) 对放射治疗的抵抗力. 该系统针对低氧性CSC的碳酸酶IX (CAIX),提高治疗效率,减少瘤生长和转移.
科学领域:
- 生物医学工程 生物医学工程
- 在瘤学瘤学.
- 纳米技术 纳米技术
背景情况:
- 癌症干细胞 (CSCs) 驱动瘤对放射治疗 (RT) 的抵抗.
- CSCs的深层瘤位置和低氧,酸性位加剧了放射电阻.
- 低毒性CSC在其表面上过度表达碳酸无水酶IX (CAIX).
研究的目的:
- 开发一个针对CAIX的药物输送系统,以克服CSC介导的放射电阻.
- 研究系统在深层瘤和缺氧微环境中的有效性.
- 通过促进CSC分化和增加DNA损伤来增强RT.
主要方法:
- 构建了一个基于的药物递送系统 (CA-Pt),可以在CSC表面上自组装.
- 使用了一种顺序的过程:单体释放,目标积累和表面自组装.
- 评估了CA-Pt的深度透,CAIX抑制,细胞吸收和微环境调节.
主要成果:
- CA-Pt证明了深度瘤透和增强CAIX抑制.
- 该系统有效地缓解了低氧和酸性微环境,促进了CSC的差异化.
- 与RT结合的CA-Pt显著增加了DNA损伤,抑制了瘤生长,并在小鼠和斑马鱼模型中减少了入侵/转移.
结论:
- 针对表面诱导的自我组装,CAIX提供了一种克服放射电阻的新策略.
- 这种方法有效地区分了缺氧的CSC,提高了放射治疗的结果.
- 开发的系统为抗辐射瘤提供了一个潜在的通用治疗策略.
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