Department of Health Toxicology, College of Naval Medicine, Naval Medical University, Shanghai, 200433, China.
Department of Urology, Changhai Hospital, Naval Medical University, Shanghai, 200433, China.
Adv Sci (Weinh). 2024 Nov;11(43):e2407196. doi: 10.1002/advs.202407196. Epub 2024 Sep 27.
Reactive oxygen species (ROS)-mediated sonodynamic therapy (SDT) holds increasing potential in treating deep-seated tumor owing to the high tissue-penetration depth. However, the inevitable accumulation of sonosensitizers in normal tissues not only make it difficult to realize the in situ SDT, but also induces sonodynamic effects in normal tissues. Herein, this work reports the passivation and selective activation strategies for the sonodynamic and near-infrared (NIR) imaging performances of an intelligent antitumor theranostic platform termed Cu-IR783 nanoparticles (NPs). Owing to the ruptured coordination bond between IR783 with Cu ions by responding to tumor microenvironment (TME), the selective activation of IR783 only occurred in tumor tissues to achieve the visualized in-situ SDT. The tumor-specific released Cu ions not only realized the cascade amplification of ROS generation through Cu-mediated Fenton-like reaction, but also triggered cuproptosis through Cu-induced DLAT oligomerization and mitochondrial dysfunction. More importantly, the immunosuppressive TME can be reversed by the greatly enhanced ROS levels and high-efficiency cuproptosis, ultimately inducing immunogenic cell death that promotes robust systemic immune responses for the eradication of primary tumors and suppression of distant tumors. This work provides a distinct paradigm of the integration of SDT, CDT, and cuproptosis in a controlled manner to achieve visualized in-situ antitumor therapy.
活性氧(ROS)介导的声动力学疗法(SDT)由于具有较高的组织穿透深度,在治疗深部肿瘤方面具有越来越大的潜力。然而,声敏剂不可避免地在正常组织中的积累不仅使得原位 SDT 难以实现,而且还会在正常组织中诱导声动力学效应。在此,本工作报道了一种称为 Cu-IR783 纳米颗粒(NPs)的智能抗肿瘤治疗学平台的声动力学和近红外(NIR)成像性能的钝化和选择性激活策略。由于 IR783 与 Cu 离子之间的配位键在响应肿瘤微环境(TME)时破裂,IR783 的选择性激活仅在肿瘤组织中发生,以实现可视化的原位 SDT。肿瘤特异性释放的 Cu 离子不仅通过 Cu 介导的芬顿样反应实现了 ROS 生成的级联放大,而且通过 Cu 诱导的 DLAT 寡聚化和线粒体功能障碍引发了铜死亡。更重要的是,ROS 水平的大大增强和高效铜死亡可以逆转免疫抑制性 TME,最终诱导免疫原性细胞死亡,促进对原发性肿瘤的强烈全身免疫反应和对远处肿瘤的抑制。这项工作提供了一种将 SDT、CDT 和铜死亡以可控的方式整合在一起以实现可视化原位抗肿瘤治疗的独特范例。
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