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논문 기본 정보

자료유형
학술저널
저자정보
Wenjun Wang (The First Affiliated Hospital of Guangzhou Medical University Guangzhou Guangdong 510120 P.R. China) ziman Wu (The First Affiliated Hospital of Guangzhou Medical University Guangzhou Guangdong 510120 P.R. China) peiru Shi (Guangzhou Medical University (KingMed school of Laboratory Medicine) Guangzhou Guangdong 510182 P.R) pinyun Wu (Guangzhou Medical University (KingMed school of Laboratory Medicine) Guangzhou Guangdong 510182 P.R) peng Qin (Guangzhou Medical University (KingMed school of Laboratory Medicine) Guangzhou Guangdong 510182 P.R) lin Yu (The First Affiliated Hospital of Guangzhou Medical University Guangzhou Guangdong 510120 P.R. China)
저널정보
한국미생물생명공학회 Journal of Microbiology and Biotechnology Journal of Microbiology and Biotechnology 제32권 제2호
발행연도
2022.2
수록면
263 - 267 (5page)
DOI
10.4014/jmb.2107.07046

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The aim of this study was to determine whether the antibacterial activity of chitosan-modified Fe3O4 (CS@Fe3O4) nanomaterials against Acinetobacter baumannii (A. baumannii) is mediated through changes in biofilm formation and reactive oxygen species (ROS) production. For this purpose, the broth dilution method was used to examine the effect of CS@Fe3O4 nanoparticles on bacterial growth. The effects of CS@Fe3O4 nanoparticles on biofilm formation were measured using a semiquantitative crystal violet staining assay. In addition, a bacterial ROS detection kit was used to detect the production of ROS in bacteria. The results showed that CS@Fe3O4 nanoparticles had a significant inhibitory effect on the colony growth and biofilm formation of drug-resistant A. baumannii (p < 0.05). The ROS stress assay revealed significantly higher ROS levels in A. baumannii subjected to CS@Fe3O4 nanoparticle treatment than the control group (p < 0.05). Thus, we demonstrated for the first time that CS@Fe3O4 nanoparticles had an inhibitory effect on A. baumannii in vitro, and that the antibacterial effect of CS@Fe3O4 nanoparticles on drug-resistant A. baumannii was more significant than on drug-sensitive bacteria. Our findings suggest that the antibacterial mechanism of CS@Fe3O4 nanoparticles is mediated through inhibition of biofilm formation in drug-resistant bacteria, as well as stimulation of A. baumannii to produce ROS. In summary, our data indicate that CS@Fe3O4 nanoparticles could be used to treat infections caused by drug-resistant A. baumannii.

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