Yao Can, Zhang Rui, Xie Zongliang, Wu Yundi, Wu Xilong
School of Biomedical Engineering, State Key Laboratory of Digital Medical Engineering, Hainan University, Haikou, 570228, China.
School of Life and Health Sciences, State Key Laboratory of Marine Resource Utilization in South China Sea, Hainan University, Haikou, 570228, China.
Small. 2025 Feb;21(5):e2409026. doi: 10.1002/smll.202409026. Epub 2024 Dec 10.
Nanozymes mimicking enzymes show great promise in anti-tumor therapy but are often limited by their low catalytic activity and lack of tumor specificity in hostile tumor microenvironments. This study develops a novel nanozyme, D/P@ZUCO, utilizing metal-organic frameworks (MOFs) with glutathione oxidase, peroxidase, and catalase-like activities. D/P@ZUCO is synthesized using ZnFeO and NH-UiO66 (Cu/Zr) through an in situ growth method, followed by loading with doxorubicin (DOX) and primaquine (PQ), and functionalization with oxidized hyaluronic acid (OHA). It efficiently catalyzes the conversion of hydrogen peroxide (HO) into hydroxyl radicals (·OH) and glutathione (GSH) into glutathione disulfide (GSSH), initiating ferroptosis in cancer cells. Additionally, the conversion of excess HO into oxygen (O) enhances the apoptosis effects of DOX. Importantly, the inhibition of autophagy by D/P@ZUCO exacerbates ferroptosis and immunogenic cell death (ICD), triggering a potent anti-tumor immune response. The targeted drug delivery of D/P@ZUCO is facilitated by magnetic guidance and interactions between OHA and CD44 receptors. D/P@ZUCO demonstrates effective cancer treatment by triggering multiple cell death pathways through a synergistic combination of enzymatic actions, serving as a paradigm for systemic activation of multiple enzymes in triple-negative breast cancer therapy.
模拟酶的纳米酶在抗肿瘤治疗中显示出巨大潜力,但在恶劣的肿瘤微环境中,它们往往受到低催化活性和缺乏肿瘤特异性的限制。本研究开发了一种新型纳米酶D/P@ZUCO,它利用具有谷胱甘肽氧化酶、过氧化物酶和过氧化氢酶样活性的金属有机框架(MOF)。D/P@ZUCO通过原位生长法,使用ZnFeO和NH-UiO66(Cu/Zr)合成,随后负载阿霉素(DOX)和伯氨喹(PQ),并用氧化透明质酸(OHA)进行功能化。它能有效地将过氧化氢(HO)转化为羟基自由基(·OH),将谷胱甘肽(GSH)转化为谷胱甘肽二硫化物(GSSH),从而引发癌细胞的铁死亡。此外,将过量的HO转化为氧气(O)增强了DOX的凋亡作用。重要的是,D/P@ZUCO对自噬的抑制加剧了铁死亡和免疫原性细胞死亡(ICD),引发了强大的抗肿瘤免疫反应。D/P@ZUCO的靶向药物递送通过磁导向以及OHA与CD44受体之间的相互作用来实现。D/P@ZUCO通过酶促作用的协同组合触发多种细胞死亡途径,从而有效治疗癌症,为三阴性乳腺癌治疗中多种酶的全身激活提供了范例。
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