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FeS2@COF based nanocarrier for photothermal-enhanced chemodynamic/thermodynamic tumor therapy and immunotherapy via reprograming tumor-associated macrophages

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机构： [1]Trauma medical center, Department of Orthopedics surgery, West China Hospital, Sichuan University, Chengdu 610041, China [2]Orthopedics Research Institute, Department of Orthopedics, West China Hospital, Sichuan University, Chengdu, China [3]Department of Gynecology, West China Second Hospital, Sichuan University, Chengdu, China

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关键词： FeS2 Covalent organic frameworks Thermodynamic therapy Chemodynamic therapy Photothermal therapy

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Developing high-performance nanomedicines to enhance antitumor efficacy remains a hot point in the field of biomedicine. In this study, we designed a versatile nanocomposite (FeS₂@COF-HA/AIPH) integrating covalent organic frameworks (COF) functionalized with pyrite (FeS₂) for synergistic photothermal (PTT), chemodynamic (CDT), thermodynamic (TDT) therapies, and immunotherapy. The superior photothermal effects and catalytic capabilities of FeS₂@COF enabled a minimally invasive PTT/CDT combination. The nanoplatform, with its mesoporous structure, also served as a drug delivery system, encapsulating the thermos-decomposable initiator AIPH. The hyaluronic acid (HA) coating not only improved tumor-targeting efficiency but also prevented nonspecific AIPH release. Under near-infrared (NIR) irradiation, the localized hyperthermia triggered AIPH decomposition, generating toxic alkyl radicals (•R) for TDT, further enhancing CDT efficiency. The combination of PTT, CDT, TDT, and immunotherapy led to potent antitumor effects with minimal systemic toxicity, both in vitro and in vivo. Notably, the nanoplatform effectively reprogrammed tumor-associated macrophages (TAMs) from an M2 to M1 phenotype, boosting antitumor immunity. This multifunctional platform thus offers a promising strategy for integrated PTT, CDT, TDT, and immune activation in tumor therapy.© 2024. The Author(s).

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大类 | 1 区

生物学

小类 | 1 区生物工程与应用微生物 2 区纳米科技

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第一作者机构： [1]Trauma medical center, Department of Orthopedics surgery, West China Hospital, Sichuan University, Chengdu 610041, China [2]Orthopedics Research Institute, Department of Orthopedics, West China Hospital, Sichuan University, Chengdu, China

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