Glucose oxidase-copper hybrid nanoflowers embedded with magnetic nanoparticles as an effective antibacterial agent
- Authors
- Lee I.; Cheon H.J.; Adhikari M.D.; Tran T.D.; Yeon K.-M.; Kim M.I.; Kim J.
- Issue Date
- Jul-2020
- Publisher
- Elsevier B.V.
- Keywords
- Antibacterial activity; Enzyme-inorganic hybrid nanoflowers; Glucose oxidase
- Citation
- International Journal of Biological Macromolecules, v.155, pp.1520 - 1531
- Journal Title
- International Journal of Biological Macromolecules
- Volume
- 155
- Start Page
- 1520
- End Page
- 1531
- URI
- https://scholarworks.bwise.kr/gachon/handle/2020.sw.gachon/19462
- DOI
- 10.1016/j.ijbiomac.2019.11.129
- ISSN
- 0141-8130
- Abstract
- Bacterial contamination causes various problems ranging from bacterial infection to biofouling. As an effective and non-toxic agent for bacterial de-contamination, glucose oxidase (GOx)-copper hybrid nanoflowers embedded with amine-functionalized magnetic nanoparticles (NH2-MNPs), called ‘MNP-GOx NFs’, are developed. Positively-charged NH2-MNPs and negatively-charged GOx molecules are first interacted via electrostatic attraction which can be controlled by changing the buffer pH, and the follow-up addition of copper(II) sulfate leads to blooming of nanoflowers (MNP-GOx NFs) after incubation at room temperature for 3 days. MNP-GOx NFs show effective antibacterial activity by generating H2O2 from GOx-catalyzed glucose oxidation. For example, 99.9% killings of Staphylococcus aureus and Escherichia coli are achieved after 3 h treatment of 106/mL cells with 0.2 and 3.0 mg/mL MNP-GOx NFs, respectively, revealing that Gram-positive S. aureus with mono-layer membrane system is more vulnerable to the treatment of MNP-GOx NFs than Gram-negative E. coli with two-layer membrane system. MNP-GOx NFs can maintain 97% of bactericidal activity even after recycled uses by magnetic separation for eight times iterative bacterial killings. Finally, MNP-GOx NFs are employed for the fabrication of antibacterial gauzes. MNP-GOx NFs have also opened up a great potential for their applications in biosensors, biofuel cells and bioconversion as well as bacterial de-contamination. © 2019
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