声动力疗法
材料科学
肿瘤微环境
活性氧
纳米技术
合理设计
免疫系统
纳米医学
组合化学
癌症研究
纳米颗粒
化学
生物化学
医学
免疫学
作者
Zhixiang Lu,Shuang Bai,Yonghe Jiang,Shuodong Wu,Dong Xü,Yulun Chen,Yulu Lan,Yibo An,Jingsong Mao,Xuan Liu,Gang Liu
标识
DOI:10.1002/adfm.202207749
摘要
Abstract The rational design of tumor microenvironment (TME)‐activated nanomedicine is driving a new direction in tumor immunology. Furthermore, the novel therapeutic mode of ultrasound‐triggered sonodynamic therapy (SDT) has been proven to specifically activate the immune response. Herein, a well‐defined covalent organic framework (COF) with sonosensitive properties is synthesized through experimental and theoretical verification, followed by the efficient loading of the toll‐like receptor agonist (Poly(I:C)) and in situ growth of paramagnetic transitional metallic oxide of manganese bioxide (MnO 2 ). The MnO 2 ‐Poly(I:C)@COF shell can reverse the reductive TME by consuming glutathione (GSH) to release Mn 2+ , simultaneously generating marked magnetic resonance imaging signals for real‐time guidance. Importantly, the MnO 2 acts as an enzyme‐like nano‐catalyst to promote TME‐overexpressed hydrogen peroxide (H 2 O 2 ) and produce oxygen, facilitating SDT‐induced reactive oxygen species production, and inducing immunogenic cell death, thereby boosting immune engine and triggering abundant neoantigen exposure. With the powerful assistance of immunological agents Mn 2+ and Poly(I:C), the triggered immune engine is amplified by refueling the engine (stepping on the accelerator) to reduce the immunosuppressive state. Overall, this study improves the synthesis of multifunctional COF and expands its application. The developed nano‐sonosensitizer system provides a paradigm to enhance SDT‐based high‐performance multifunctional sonosensitizers, and this SDT‐mediated strong tumor‐suppressive efficiency and activated immune effect represent a promising combinatorial therapeutic strategy for cancer therapy.
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