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In vitro antibacterial properties of CuP nanozymes. (A) Photographs of MRSA bacterial colonies cocultured with different concentrations of CuP nanozymes in a pH <t>5.5</t> solution with or without the addition of low concentrations of H 2 O 2 . (B) Survival of MRSA bacteria after different treatments (n = 3). (C) Fluorescence images of dead (red) and live (green) bacteria under different treatments ( MRSA ) (scale bar, 50 μm). (D) Detection and analysis of MRSA by the DCFH-DA probe under different treatment conditions (scale bar, 50 μm). (E) Typical scanning electron microscopy images of MRSA after different treatments (scale bar, 1 μm). (F) Protein concentration of MRSA leakage after different treatments. (G) Photographs of E. coli bacterial colonies cocultured with different concentrations of CuP nanozymes in a pH 5.5 solution with or without the addition of low concentrations of H 2 O 2 . (H) Bacterial survival of E. coli after different treatments (n = 3). (I) Fluorescence images (scale bar, 50 μm) of dead (red) and live (green) bacteria under different treatments ( E. coli ) (scale bar, 50 μm). (J) Detection and analysis of E. coli by the DCFH-DA probe under different treatment conditions (scale bar, 50 μm). (K) Typical SEM images of E. coli after different treatments (scale bar, 1 μm). (L) Concentration of protein leaked by E. coli after different treatments. All values are expressed as the mean ± SD (n = 3). Statistical analysis was performed via Student's two-tailed t -test (∗∗∗p < 0.001, ∗∗p < 0.01 and ∗p < 0.05).
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In vitro antibacterial properties of CuP nanozymes. (A) Photographs of MRSA bacterial colonies cocultured with different concentrations of CuP nanozymes in a pH <t>5.5</t> solution with or without the addition of low concentrations of H 2 O 2 . (B) Survival of MRSA bacteria after different treatments (n = 3). (C) Fluorescence images of dead (red) and live (green) bacteria under different treatments ( MRSA ) (scale bar, 50 μm). (D) Detection and analysis of MRSA by the DCFH-DA probe under different treatment conditions (scale bar, 50 μm). (E) Typical scanning electron microscopy images of MRSA after different treatments (scale bar, 1 μm). (F) Protein concentration of MRSA leakage after different treatments. (G) Photographs of E. coli bacterial colonies cocultured with different concentrations of CuP nanozymes in a pH 5.5 solution with or without the addition of low concentrations of H 2 O 2 . (H) Bacterial survival of E. coli after different treatments (n = 3). (I) Fluorescence images (scale bar, 50 μm) of dead (red) and live (green) bacteria under different treatments ( E. coli ) (scale bar, 50 μm). (J) Detection and analysis of E. coli by the DCFH-DA probe under different treatment conditions (scale bar, 50 μm). (K) Typical SEM images of E. coli after different treatments (scale bar, 1 μm). (L) Concentration of protein leaked by E. coli after different treatments. All values are expressed as the mean ± SD (n = 3). Statistical analysis was performed via Student's two-tailed t -test (∗∗∗p < 0.001, ∗∗p < 0.01 and ∗p < 0.05).
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In vitro antibacterial properties of CuP nanozymes. (A) Photographs of MRSA bacterial colonies cocultured with different concentrations of CuP nanozymes in a pH <t>5.5</t> solution with or without the addition of low concentrations of H 2 O 2 . (B) Survival of MRSA bacteria after different treatments (n = 3). (C) Fluorescence images of dead (red) and live (green) bacteria under different treatments ( MRSA ) (scale bar, 50 μm). (D) Detection and analysis of MRSA by the DCFH-DA probe under different treatment conditions (scale bar, 50 μm). (E) Typical scanning electron microscopy images of MRSA after different treatments (scale bar, 1 μm). (F) Protein concentration of MRSA leakage after different treatments. (G) Photographs of E. coli bacterial colonies cocultured with different concentrations of CuP nanozymes in a pH 5.5 solution with or without the addition of low concentrations of H 2 O 2 . (H) Bacterial survival of E. coli after different treatments (n = 3). (I) Fluorescence images (scale bar, 50 μm) of dead (red) and live (green) bacteria under different treatments ( E. coli ) (scale bar, 50 μm). (J) Detection and analysis of E. coli by the DCFH-DA probe under different treatment conditions (scale bar, 50 μm). (K) Typical SEM images of E. coli after different treatments (scale bar, 1 μm). (L) Concentration of protein leaked by E. coli after different treatments. All values are expressed as the mean ± SD (n = 3). Statistical analysis was performed via Student's two-tailed t -test (∗∗∗p < 0.001, ∗∗p < 0.01 and ∗p < 0.05).
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In vitro antibacterial properties of CuP nanozymes. (A) Photographs of MRSA bacterial colonies cocultured with different concentrations of CuP nanozymes in a pH <t>5.5</t> solution with or without the addition of low concentrations of H 2 O 2 . (B) Survival of MRSA bacteria after different treatments (n = 3). (C) Fluorescence images of dead (red) and live (green) bacteria under different treatments ( MRSA ) (scale bar, 50 μm). (D) Detection and analysis of MRSA by the DCFH-DA probe under different treatment conditions (scale bar, 50 μm). (E) Typical scanning electron microscopy images of MRSA after different treatments (scale bar, 1 μm). (F) Protein concentration of MRSA leakage after different treatments. (G) Photographs of E. coli bacterial colonies cocultured with different concentrations of CuP nanozymes in a pH 5.5 solution with or without the addition of low concentrations of H 2 O 2 . (H) Bacterial survival of E. coli after different treatments (n = 3). (I) Fluorescence images (scale bar, 50 μm) of dead (red) and live (green) bacteria under different treatments ( E. coli ) (scale bar, 50 μm). (J) Detection and analysis of E. coli by the DCFH-DA probe under different treatment conditions (scale bar, 50 μm). (K) Typical SEM images of E. coli after different treatments (scale bar, 1 μm). (L) Concentration of protein leaked by E. coli after different treatments. All values are expressed as the mean ± SD (n = 3). Statistical analysis was performed via Student's two-tailed t -test (∗∗∗p < 0.001, ∗∗p < 0.01 and ∗p < 0.05).
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In vitro antibacterial properties of CuP nanozymes. (A) Photographs of MRSA bacterial colonies cocultured with different concentrations of CuP nanozymes in a pH <t>5.5</t> solution with or without the addition of low concentrations of H 2 O 2 . (B) Survival of MRSA bacteria after different treatments (n = 3). (C) Fluorescence images of dead (red) and live (green) bacteria under different treatments ( MRSA ) (scale bar, 50 μm). (D) Detection and analysis of MRSA by the DCFH-DA probe under different treatment conditions (scale bar, 50 μm). (E) Typical scanning electron microscopy images of MRSA after different treatments (scale bar, 1 μm). (F) Protein concentration of MRSA leakage after different treatments. (G) Photographs of E. coli bacterial colonies cocultured with different concentrations of CuP nanozymes in a pH 5.5 solution with or without the addition of low concentrations of H 2 O 2 . (H) Bacterial survival of E. coli after different treatments (n = 3). (I) Fluorescence images (scale bar, 50 μm) of dead (red) and live (green) bacteria under different treatments ( E. coli ) (scale bar, 50 μm). (J) Detection and analysis of E. coli by the DCFH-DA probe under different treatment conditions (scale bar, 50 μm). (K) Typical SEM images of E. coli after different treatments (scale bar, 1 μm). (L) Concentration of protein leaked by E. coli after different treatments. All values are expressed as the mean ± SD (n = 3). Statistical analysis was performed via Student's two-tailed t -test (∗∗∗p < 0.001, ∗∗p < 0.01 and ∗p < 0.05).
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dithiobis  (Macklin Inc)
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In vitro antibacterial properties of CuP nanozymes. (A) Photographs of MRSA bacterial colonies cocultured with different concentrations of CuP nanozymes in a pH <t>5.5</t> solution with or without the addition of low concentrations of H 2 O 2 . (B) Survival of MRSA bacteria after different treatments (n = 3). (C) Fluorescence images of dead (red) and live (green) bacteria under different treatments ( MRSA ) (scale bar, 50 μm). (D) Detection and analysis of MRSA by the DCFH-DA probe under different treatment conditions (scale bar, 50 μm). (E) Typical scanning electron microscopy images of MRSA after different treatments (scale bar, 1 μm). (F) Protein concentration of MRSA leakage after different treatments. (G) Photographs of E. coli bacterial colonies cocultured with different concentrations of CuP nanozymes in a pH 5.5 solution with or without the addition of low concentrations of H 2 O 2 . (H) Bacterial survival of E. coli after different treatments (n = 3). (I) Fluorescence images (scale bar, 50 μm) of dead (red) and live (green) bacteria under different treatments ( E. coli ) (scale bar, 50 μm). (J) Detection and analysis of E. coli by the DCFH-DA probe under different treatment conditions (scale bar, 50 μm). (K) Typical SEM images of E. coli after different treatments (scale bar, 1 μm). (L) Concentration of protein leaked by E. coli after different treatments. All values are expressed as the mean ± SD (n = 3). Statistical analysis was performed via Student's two-tailed t -test (∗∗∗p < 0.001, ∗∗p < 0.01 and ∗p < 0.05).
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5 5 dithionitrobis 2benzoic acid  (Thermo Fisher)
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In vitro antibacterial properties of CuP nanozymes. (A) Photographs of MRSA bacterial colonies cocultured with different concentrations of CuP nanozymes in a pH <t>5.5</t> solution with or without the addition of low concentrations of H 2 O 2 . (B) Survival of MRSA bacteria after different treatments (n = 3). (C) Fluorescence images of dead (red) and live (green) bacteria under different treatments ( MRSA ) (scale bar, 50 μm). (D) Detection and analysis of MRSA by the DCFH-DA probe under different treatment conditions (scale bar, 50 μm). (E) Typical scanning electron microscopy images of MRSA after different treatments (scale bar, 1 μm). (F) Protein concentration of MRSA leakage after different treatments. (G) Photographs of E. coli bacterial colonies cocultured with different concentrations of CuP nanozymes in a pH 5.5 solution with or without the addition of low concentrations of H 2 O 2 . (H) Bacterial survival of E. coli after different treatments (n = 3). (I) Fluorescence images (scale bar, 50 μm) of dead (red) and live (green) bacteria under different treatments ( E. coli ) (scale bar, 50 μm). (J) Detection and analysis of E. coli by the DCFH-DA probe under different treatment conditions (scale bar, 50 μm). (K) Typical SEM images of E. coli after different treatments (scale bar, 1 μm). (L) Concentration of protein leaked by E. coli after different treatments. All values are expressed as the mean ± SD (n = 3). Statistical analysis was performed via Student's two-tailed t -test (∗∗∗p < 0.001, ∗∗p < 0.01 and ∗p < 0.05).
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In vitro antibacterial properties of CuP nanozymes. (A) Photographs of MRSA bacterial colonies cocultured with different concentrations of CuP nanozymes in a pH 5.5 solution with or without the addition of low concentrations of H 2 O 2 . (B) Survival of MRSA bacteria after different treatments (n = 3). (C) Fluorescence images of dead (red) and live (green) bacteria under different treatments ( MRSA ) (scale bar, 50 μm). (D) Detection and analysis of MRSA by the DCFH-DA probe under different treatment conditions (scale bar, 50 μm). (E) Typical scanning electron microscopy images of MRSA after different treatments (scale bar, 1 μm). (F) Protein concentration of MRSA leakage after different treatments. (G) Photographs of E. coli bacterial colonies cocultured with different concentrations of CuP nanozymes in a pH 5.5 solution with or without the addition of low concentrations of H 2 O 2 . (H) Bacterial survival of E. coli after different treatments (n = 3). (I) Fluorescence images (scale bar, 50 μm) of dead (red) and live (green) bacteria under different treatments ( E. coli ) (scale bar, 50 μm). (J) Detection and analysis of E. coli by the DCFH-DA probe under different treatment conditions (scale bar, 50 μm). (K) Typical SEM images of E. coli after different treatments (scale bar, 1 μm). (L) Concentration of protein leaked by E. coli after different treatments. All values are expressed as the mean ± SD (n = 3). Statistical analysis was performed via Student's two-tailed t -test (∗∗∗p < 0.001, ∗∗p < 0.01 and ∗p < 0.05).

Journal: Bioactive Materials

Article Title: Copper phosphate nanozymes combat implant-related infections by inducing cuproptosis-like death and inhibiting the two-component system

doi: 10.1016/j.bioactmat.2026.02.042

Figure Lengend Snippet: In vitro antibacterial properties of CuP nanozymes. (A) Photographs of MRSA bacterial colonies cocultured with different concentrations of CuP nanozymes in a pH 5.5 solution with or without the addition of low concentrations of H 2 O 2 . (B) Survival of MRSA bacteria after different treatments (n = 3). (C) Fluorescence images of dead (red) and live (green) bacteria under different treatments ( MRSA ) (scale bar, 50 μm). (D) Detection and analysis of MRSA by the DCFH-DA probe under different treatment conditions (scale bar, 50 μm). (E) Typical scanning electron microscopy images of MRSA after different treatments (scale bar, 1 μm). (F) Protein concentration of MRSA leakage after different treatments. (G) Photographs of E. coli bacterial colonies cocultured with different concentrations of CuP nanozymes in a pH 5.5 solution with or without the addition of low concentrations of H 2 O 2 . (H) Bacterial survival of E. coli after different treatments (n = 3). (I) Fluorescence images (scale bar, 50 μm) of dead (red) and live (green) bacteria under different treatments ( E. coli ) (scale bar, 50 μm). (J) Detection and analysis of E. coli by the DCFH-DA probe under different treatment conditions (scale bar, 50 μm). (K) Typical SEM images of E. coli after different treatments (scale bar, 1 μm). (L) Concentration of protein leaked by E. coli after different treatments. All values are expressed as the mean ± SD (n = 3). Statistical analysis was performed via Student's two-tailed t -test (∗∗∗p < 0.001, ∗∗p < 0.01 and ∗p < 0.05).

Article Snippet: Copper sulfate pentahydrate (CuSO 4 ·5H 2 O), ethylene glycol (CH 2 OH) 2 ) and disodium hydrogen phosphate (Na 2 HPO 4 ) were obtained from Sinopharm Chemical Reagent Co. Glutathione (GSH) and tetramethylbenzidine (TMB) were purchased from Aladdin Chemical Reagent Co. Phenylenediamine (OPD) and 5,5′-dithiobis(2-nitrobenzoic acid) (DTNB) were obtained from J&K Chemical Co. A reactive oxygen assay kit was purchased from Beyotime (China).

Techniques: In Vitro, Bacteria, Fluorescence, Electron Microscopy, Protein Concentration, Concentration Assay, Two Tailed Test