ArticleJournal of nanobiotechnology2026
Gold nanozyme-decorated Cu/Mn MOFs simultaneously enhances immunogenicity and alleviates immunosuppression in triple-negative breast cancer.
Article in Journal of nanobiotechnology, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
introductionThe efficacy of immunotherapy in triple-negative breast cancer (TNBC) is primarily challenged by its inherent low immunogenicity, which is further undermined by the immunosuppressive activity of tumor-associated polymorphonuclear myeloid-derived suppressor cells (PMN-MDSCs). The hypoxic microenvironment renders PMN-MDSCs susceptible to ferroptosis and exacerbates immunosuppression.
objectivesThis study aimed to design a multifunctional nanoplatform comprising Cu/Mn bimetallic metal-organic frameworks decorated with gold (Au) nanozymes (CMAP MOFs) that simultaneously enhances tumor immunogenicity and alleviates immunosuppression.
methodsThe characteristics of the nanosystem were evaluated using transmission electron microscopy, X-ray photoelectron spectroscopy, Fourier transform infrared spectroscopy, and ultraviolet-visible spectrophotometry. In vitro experiments employed Western blotting, immunofluorescence, and flow cytometry to investigate the mechanisms of enhanced immunogenicity and alleviated immunosuppression in 4T1 cells. In vivo experiments evaluated the therapeutic efficacy of the nanosystem in BALB/c mice bearing implanted 4T1 tumors.
resultsWithin tumor cells, the CMAP MOFs undergo GSH-responsive disintegration. The released Cu/Mn ions catalyze Fenton-like reaction to induce tumor cell ferroptosis and mitochondrial DNA damage, activating cGAS-STING pathway, and facilitating CD8
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