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Silver nanoparticles: Antimicrobial activity, cytotoxicity, and synergism with N-acetyl cysteine.
J Basic Microbiol. 2017 Aug; 57(8):659-668.JB

Abstract

The fast progression of nanotechnology has led to novel therapeutic interventions. Antimicrobial activities of silver nanoparticles (Ag NPs) were tested against standard ATCC strains of Staphylococcus aureus (ATCC 9144), Escherichia coli (O157:H7), Pseudomonas aeruginosa (ATCC 27853), and Candida albicans (ATCC 90028) in addition to 60 clinical isolates collected from cancer patients. Antimicrobial activity was tested by disk diffusion method and MIC values for Ag NPs alone and in combination with N-acetylcysteine (NAC) against tested pathogens were determined by broth microdilution method. Ag NPs showed a robust antimicrobial activity against all tested pathogens and NAC substantially enhanced the antimicrobial activity of Ag NPs against all tested pathogens. Synergism between Ag NPs and NAC has been confirmed by checkerboard assay. The effect of Ag NPs on tested pathogens was further scrutinized by Transmission Electron Microscope (TEM) which showed disruption of cell wall in both bacteria and fungi. Ag NPs abrogated the activity of respiratory chain dehydrogenase of all tested pathogens and released muramic acid content from S. aureus in culture. The cytotoxic effect of Ag NPs alone and in combination with NAC was examined using human HepG2 cells and this revealed no cytotoxicity at MIC values of Ag NPs and interestingly, NAC reduced the cytotoxic effect of Ag NPs at concentrations higher than their MIC values. Taken together, Ag NPs have robust antimicrobial activity and NAC substantially enhances their antimicrobial activities against MDR pathogens which would provide a novel safe, effective, and inexpensive therapeutic approach to control the prevalence of MDR pathogens.

Authors+Show Affiliations

Faculty of Pharmacy, Department of Microbiology and Immunology, Helwan University, Cairo, Egypt.Faculty of Pharmacy, Department of Microbiology and Immunology, Helwan University, Cairo, Egypt.Faculty of Pharmacy, Department of Microbiology and Immunology, Helwan University, Cairo, Egypt.Faculty of Pharmacy, Department of Microbiology and immunology, Kafr El Sheikh University, Egypt.National Institute of Laser Enhanced Sciences, Cairo University, Giza, Egypt.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

28543603

Citation

Hamed, Selwan, et al. "Silver Nanoparticles: Antimicrobial Activity, Cytotoxicity, and Synergism With N-acetyl Cysteine." Journal of Basic Microbiology, vol. 57, no. 8, 2017, pp. 659-668.
Hamed S, Emara M, Shawky RM, et al. Silver nanoparticles: Antimicrobial activity, cytotoxicity, and synergism with N-acetyl cysteine. J Basic Microbiol. 2017;57(8):659-668.
Hamed, S., Emara, M., Shawky, R. M., El-Domany, R. A., & Youssef, T. (2017). Silver nanoparticles: Antimicrobial activity, cytotoxicity, and synergism with N-acetyl cysteine. Journal of Basic Microbiology, 57(8), 659-668. https://doi.org/10.1002/jobm.201700087
Hamed S, et al. Silver Nanoparticles: Antimicrobial Activity, Cytotoxicity, and Synergism With N-acetyl Cysteine. J Basic Microbiol. 2017;57(8):659-668. PubMed PMID: 28543603.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Silver nanoparticles: Antimicrobial activity, cytotoxicity, and synergism with N-acetyl cysteine. AU - Hamed,Selwan, AU - Emara,Mohamed, AU - Shawky,Riham M, AU - El-Domany,Ramadan A, AU - Youssef,Tareq, Y1 - 2017/05/22/ PY - 2017/02/14/received PY - 2017/05/01/revised PY - 2017/05/06/accepted PY - 2017/5/26/pubmed PY - 2017/11/9/medline PY - 2017/5/26/entrez KW - MDR KW - N-acetylcysteine KW - bacteria KW - fungi KW - nanoparticles KW - synergism SP - 659 EP - 668 JF - Journal of basic microbiology JO - J Basic Microbiol VL - 57 IS - 8 N2 - The fast progression of nanotechnology has led to novel therapeutic interventions. Antimicrobial activities of silver nanoparticles (Ag NPs) were tested against standard ATCC strains of Staphylococcus aureus (ATCC 9144), Escherichia coli (O157:H7), Pseudomonas aeruginosa (ATCC 27853), and Candida albicans (ATCC 90028) in addition to 60 clinical isolates collected from cancer patients. Antimicrobial activity was tested by disk diffusion method and MIC values for Ag NPs alone and in combination with N-acetylcysteine (NAC) against tested pathogens were determined by broth microdilution method. Ag NPs showed a robust antimicrobial activity against all tested pathogens and NAC substantially enhanced the antimicrobial activity of Ag NPs against all tested pathogens. Synergism between Ag NPs and NAC has been confirmed by checkerboard assay. The effect of Ag NPs on tested pathogens was further scrutinized by Transmission Electron Microscope (TEM) which showed disruption of cell wall in both bacteria and fungi. Ag NPs abrogated the activity of respiratory chain dehydrogenase of all tested pathogens and released muramic acid content from S. aureus in culture. The cytotoxic effect of Ag NPs alone and in combination with NAC was examined using human HepG2 cells and this revealed no cytotoxicity at MIC values of Ag NPs and interestingly, NAC reduced the cytotoxic effect of Ag NPs at concentrations higher than their MIC values. Taken together, Ag NPs have robust antimicrobial activity and NAC substantially enhances their antimicrobial activities against MDR pathogens which would provide a novel safe, effective, and inexpensive therapeutic approach to control the prevalence of MDR pathogens. SN - 1521-4028 UR - https://www.unboundmedicine.com/medline/citation/28543603/Silver_nanoparticles:_Antimicrobial_activity_cytotoxicity_and_synergism_with_N_acetyl_cysteine_ L2 - https://doi.org/10.1002/jobm.201700087 DB - PRIME DP - Unbound Medicine ER -