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Microtubule polymerization induced by iridium-fullerene photosensitizers for cancer immunotherapy via dual-reactive oxygen species regulation strategy
Aggregate ( IF 13.9 ) Pub Date : 2024-06-25 , DOI: 10.1002/agt2.623
Xiao‐Xiao Chen 1, 2 , Kun Peng 1, 2 , Xi Chen 3 , Zheng‐Yin Pan 1, 2 , Qing‐Hua Shen 1, 2 , Yu‐Yi Ling 1, 2 , Jian‐Zhang Zhao 3 , Cai‐Ping Tan 1, 2
Affiliation  

Microtubules (MTs) are key players in cell division, migration, and signaling, and they are regarded as important targets for cancer treatment. In this work, two fullerene (C60)-functionalized Ir(III) complexes (Ir-C601 and Ir-C602) are rationally designed as dual reactive oxygen species (ROS) regulators and MT-targeted Type I/II photosensitizers. In the dark, Ir-C601 and Ir-C602 serve as ROS scavengers to eliminate O2 and •OH, consequently reducing the dark cytotoxicity and reversing dysfunctional T cells. Due to the efficiently populated C60-localized intraligand triplet state, Ir-C601 and Ir-C602 can be excited by green light (525 nm) to produce O2 and •OONO (Type I) and 1O2 (Type II) to overcome tumor hypoxia. Moreover, Ir-C601 is also able to photooxidize tubulin, consequently interfering with the cellular cytoskeleton structures, inducing immunogenic cell death and inhibiting cell proliferation and migration. Finally, Ir-C601 exhibits promising photo-immunotherapeutic effects both in vitro and in vivo. In all, we report here the first MT stabilizing photosensitizer performing through Type I/II photodynamic therapy pathways, which provides insights into the rational design of new photo-immunotherapeutic agents targeting specific biomolecules.

中文翻译:


铱-富勒烯光敏剂诱导的微管聚合用于癌症免疫治疗,通过双活性氧调节策略



微管 (MT) 是细胞分裂、迁移和信号传导的关键参与者,它们被认为是癌症治疗的重要靶点。在这项工作中,两种富勒烯 (C60) 官能化的 Ir(III) 络合物 (Ir-C601Ir-C602) 被合理设计为双活性氧 (ROS) 调节剂和 MT 靶向 I/II 型光敏剂。在黑暗中,Ir-C60 1Ir-C602 作为 ROS 清除剂,消除 O2- 和 •OH,从而降低暗细胞毒性并逆转功能失调的 T 细胞。由于高效填充的 C60 定位的配体内三重态,Ir-C601I r-C602 可被绿光 (525 nm) 激发,产生 O2 和 •OONO(I 型)和 1O2(II 型)以克服肿瘤缺氧。此外,Ir-C601 还能够光氧化微管蛋白,从而干扰细胞骨架结构,诱导免疫原性细胞死亡并抑制细胞增殖和迁移。最后,Ir-C601 在体外和体内均表现出有希望的光免疫治疗效果。总而言之,我们在这里报告了第一个通过 I/II 型光动力治疗途径发挥作用的 MT 稳定光敏剂,这为针对特定生物分子的新型光免疫治疗剂的合理设计提供了见解。
更新日期:2024-06-25
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