Abstract
The purpose of this article is to discuss whether gold nanoparticles (GNPs) play an auxo-action on ciprofloxacin (CIP)-mediated sonodynamic antimicrobial chemotherapy (SACT) in vitro. The measuring criterion of SACT, bactericidal efficiency, was measured by plate colony-counting methods. According to research findings, the duration of ultrasound (US) exposure, solution temperature and CIP:GNPs concentration were all critical influencing factors of SACT. Furthermore, scanning electron microscopy revealed that the group of CIP:GNPs combined with US showed the most severe damaged effect on Escherichia coli and Staphylococcus aureus, resulting in the loss of their typical microbial morphology and the disclosure of contents. Therefore, the above experimental results confirmed initially that GNPs could enhance the bacteriostasis of CIP-mediated SACT. And the intracellular reactive oxygen species (ROS) detection assays proved that this acceleration might be connected to the ROS generated through the ultrasonic mechanics. In conclusion, GNPs would be regarded as a promising auxiliary material for SACT, since they are both used to be the medication carriers and sonosensitizer accelerants.
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