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Gold nanoparticles (GNPs) and graphene oxide flakes (GOFs) exerted significantly ( p &lt; 0.0001) supportive roles on the phagocytosis bioactivity of the immune cells of phagocytic nature against the Gram-positive and Gram-negative human pathogenic bacteria Staphylococcus aureus and Escherichia coli . Under experimental conditions, upon bacterial exposure, the combined GNPs and GOFs induced significant clearance of bacteria through phagosome maturation ( p &lt; 0.0001) from time-points of 6 to 30 min and production of reactive oxygen species (ROS, p &lt; 0.0001) through the NADPH oxidase 2 (NOX2, p &lt; 0.0001)-based feedback mechanism. The effects of the combined presence of GNPs and GOFs on phagocytosis ( p &lt; 0.0001) suggested a synergistic action underway, also achieved through elevated signal transduction activity in the bone-marrow-derived macrophages (BMDM, p &lt; 0.0001). The current study demonstrated that GNPs' and GOFs' bactericidal assisting potentials could be considered an effective and alternative strategy for treating infections from both positive and negative bacterial strains.

Gold Nanoparticles and Graphene Oxide Flakes Synergistic Partaking in Cytosolic Bactericidal Augmentation: Role of ROS and NOX2 Activity