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    【Adv.Healthc.Mater】Bleeding the Excited State Energy to the Utmost: Single-Molecule Iridium Complexes for In Vivo Dual Photodynamic and Photothermal Therapy by an Infrared Low-Power Laser

    来源: 日期:2023年06月05日 09:50点击:

    Bleeding the Excited State Energy to the Utmost: Single-Molecule Iridium Complexes for In Vivo Dual Photodynamic and Photothermal Therapy by an Infrared Low-Power Laser

    By:Tang, Shi-Jie; Li, Qing-Fang; Wang, Meng-Fan; Yang, Rong; Zeng, Li-Zhen; Li, Xue-Lian; Wang, Rui-Dong; Zhang, Hongbin; Ren, Xiaoxia; Zhang, Dan; Gao, Feng

    Advanced Healthcare Materials

    DOI:https://doi.org/10.1002/adhm.202301227

    Published:2023-Jun-03

    Abstract

    A series of cyclometalated Ir(III) complexes with morpholine and piperazine groups are designed as dual photosensitizers and photothermal agents for more efficient antitumor phototherapy via infrared low-power laser. Their ground and excited state properties, as well as the structural effect on their photophysical and biological properties, are investigated by spectroscopic, electrochemical, and quantum chemical theoretical calculations. They target mitochondria in human melanoma tumor cells and trigger apoptosis related to mitochondrial dysfunction upon irradiation. The Ir(III) complexes, particularly Ir6, demonstrate high phototherapy indexes to melanoma tumor cells and a manifest photothermal effect. Ir6, with minimal hepato-/nephrotoxicity in vitro, significantly inhibits the growth of melanoma tumors in vivo under 808nm laser irradiation by dual photodynamic therapy and photothermal therapy and can be efficiently eliminated from the body. These results may contribute to the development of highly efficient phototherapeutic drugs for large, deeply buried solid tumors.



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