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Toxic effects of nanoparticles on macrophages. (A) Cytotoxicity of Pt, Se, and Pt–Se NPs to RAW264.7 as evaluated by CCK-8 assay. (B) Calcein-AM/PI staining was performed, and the live/dead cell ratio was quantified (C). Scale bar, 400 μm. n = 3. The symbol “*” indicates a comparison between groups. ***P < 0.001.
