Antibacterial efficacy, mode of action, and safety of a novel nano-antibiotic against antibiotic-resistant Escherichia coli strains.

Λεπτομέρειες βιβλιογραφικής εγγραφής
Τίτλος: Antibacterial efficacy, mode of action, and safety of a novel nano-antibiotic against antibiotic-resistant Escherichia coli strains.
Συγγραφείς: Ubah CS; Department of Public Health, Brody School of Medicine, East Carolina University, Greenville, NC, USA., Pokhrel LR; Department of Public Health, Brody School of Medicine, East Carolina University, Greenville, NC, USA. Electronic address: POKHRELL18@ecu.edu., Williams JE; Environmental Health Science Program, Department of Health Education and Promotion, College of Health and Human Performance, East Carolina University, Greenville, NC, USA., Akula SM; Department of Microbiology and Immunology, Brody School of Medicine, East Carolina University, Greenville, NC, USA., Richards SL; Environmental Health Science Program, Department of Health Education and Promotion, College of Health and Human Performance, East Carolina University, Greenville, NC, USA., Kearney GD; Department of Public Health, Brody School of Medicine, East Carolina University, Greenville, NC, USA., Williams A; Woebot Health, San Francisco, CA, USA.
Πηγή: The Science of the total environment [Sci Total Environ] 2024 May 15; Vol. 925, pp. 171675. Date of Electronic Publication: 2024 Mar 12.
Τύπος έκδοσης: Journal Article
Γλώσσα: English
Στοιχεία περιοδικού: Publisher: Elsevier Country of Publication: Netherlands NLM ID: 0330500 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1879-1026 (Electronic) Linking ISSN: 00489697 NLM ISO Abbreviation: Sci Total Environ Subsets: MEDLINE
Imprint Name(s): Original Publication: Amsterdam, Elsevier.
Ιατρικοί όροι (MeSH): Metal Nanoparticles*/toxicity , Bacterial Infections*, Anti-Bacterial Agents/toxicity ; Silver/toxicity ; Ampicillin/pharmacology ; Kanamycin/pharmacology ; Humans ; Escherichia coli ; Bacteria ; Microbial Sensitivity Tests
Περίληψη: Globally rising antibiotic-resistant (AR) and multi-drug resistant (MDR) bacterial infections are of public health concern due to treatment failure with current antibiotics. Enterobacteria, particularly Escherichia coli, cause infections of surgical wound, bloodstream, and urinary tract, including pneumonia and sepsis. Herein, we tested in vitro antibacterial efficacy, mode of action (MoA), and safety of novel amino-functionalized silver nanoparticles (NH2-AgNP) against the AR bacteria. Two AR E. coli strains (i.e., ampicillin- and kanamycin-resistant E. coli), including a susceptible strain of E. coli DH5α, were tested for susceptibility to NH2-AgNP using Kirby-Bauer disk diffusion and standard growth assays. Dynamic light scattering (DLS) was used to determine cell debris and relative conductance was used as a measure of cell leakage, and results were confirmed with transmission electron microscopy (TEM). Multiple oxidative stress assays were used for in vitro safety evaluation of NH2-AgNP in human lung epithelial cells. Results showed that ampicillin and kanamycin did not inhibit growth in either AR bacterial strain with doses up to 160 μg/mL tested. NH2-AgNP exhibited broad-spectrum bactericidal activity, inhibiting the growth of all three bacterial strains at doses ≥1 μg/mL. DLS and TEM revealed cell debris formation and cell leakage upon NH2-AgNP treatment, suggesting two possible MoAs: electrostatic interactions followed by cell wall damage. Safety evaluation revealed NH2-AgNP as noncytotoxic and antioxidative to human lung epithelial cells. Taken together, these results suggest that NH2-AgNP may serve as an effective and safer bactericidal therapy against AR bacterial infections compared to common antibiotics.
(Copyright © 2024 Elsevier B.V. All rights reserved.)
Competing Interests: Declaration of competing interest There is no conflict of interest to disclose.
Contributed Indexing: Keywords: Antibiotic resistant bacteria; Hospital acquired infections; Nano-antibiotics; Nanomedicine; Nosocomial infections; Superbugs
Substance Nomenclature: 0 (Anti-Bacterial Agents)
3M4G523W1G (Silver)
7C782967RD (Ampicillin)
59-01-8 (Kanamycin)
Entry Date(s): Date Created: 20240314 Date Completed: 20240401 Latest Revision: 20240401
Update Code: 20260130
DOI: 10.1016/j.scitotenv.2024.171675
PMID: 38485022
Βάση Δεδομένων: MEDLINE