纳米金属有机框架克服了光动力疗法的缺氧
Guangxu Lan, Kaiyuan Ni, Ziwan Xu1
1College of Chemistry and Molecular Engineering , Peking University , Beijing 100871 , China.
Journal of the American Chemical Society
|April 19, 2018
概括
这项研究引入了Fe-TBP,一种新型的纳米光敏剂,可以克服瘤缺氧,增强癌症免疫疗法. 以Fe-TBP为媒介的光动力疗法激活瘤,显著改善免疫治疗反应,并导致小鼠的瘤回归.
科学领域:
- 生物医学工程
- 纳米技术
- 癌症研究
背景情况:
- 免疫疗法是一种有前途的癌症治疗方法,但对部分患者的疗效有限.
- 免疫光动力疗法 (PDT) 可以增强癌症免疫疗法,但其有效性受到瘤缺氧的影响.
- 开发克服瘤缺氧的策略对于改善癌症免疫治疗结果至关重要.
研究的目的:
- 报告一个新的纳米金属有机框架,Fe-TBP,作为一个纳米光敏剂.
- 克服瘤缺氧并提高癌症免疫疗法的有效PDT.
- 为增强免疫疗法反应的非炎症瘤.
主要方法:
- 使用铁氧集群和氨酸配体制造Fe-TBP.
- 在正常和缺氧条件下评估Fe-TBP介导的PDT疗效.
- 在结直肠癌小鼠模型中对联合Fe-TBPPDT和抗编程死亡配体1 (α-PD-L1) 治疗进行评估.
主要成果:
- 在正常和低氧瘤条件下,Fe-TBP显示有效的PDT敏感性.
- 在结直肠癌模型中,联合Fe-TBPPDT和α-PD-L1治疗导致显著的瘤回归 (> 90%).
- 机制研究证实Fe-TBP介导的PDT显著增加了细胞毒性T细胞透到瘤中.
- 观察到abscopal效应,表明全身抗瘤免疫力.
结论:
- 这是一种能够克服瘤缺氧的新奇纳米光敏剂.
- 以Fe-TBP为媒介的PDT有效启动瘤以加强癌症免疫疗法,包括α-PD-L1治疗.
- 在具有挑战性的癌症模型中,这种方法显示出改善治疗反应和实现瘤回归的巨大潜力.
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