Selective Labeling and Growth Inhibition of Pseudomonas aeruginosa by Aminoguanidine Carbon Dots

Gil Otis, Sagarika Bhattacharya, Orit Malka, Sofiya Kolusheva, Priyanka Bolel, Angel Porgador, Raz Jelinek

Research output: Contribution to journalArticlepeer-review

28 Scopus citations

Abstract

Pseudomonas aeruginosa is a highly virulent bacterium, particularly associated with the spread of multidrug resistance. Here we show that carbon dots (C-dots), synthesized from aminoguanidine and citric acid precursors, can selectively stain and inhibit the growth of P. aeruginosa strains. The aminoguanidine-C-dots were shown both to target P. aeruginosa bacterial cells and also to inhibit biofilm formation by the bacteria. Mechanistic analysis points to interactions between aminoguanidine residues on the C-dots' surface and P. aeruginosa lipopolysaccharide moieties as the likely determinants for both antibacterial and labeling activities. Indeed, the application of biomimetic membrane assays reveals that LPS-promoted insertion and bilayer permeation constitute the primary factors in the anti-P. aeruginosa effect of the aminoguanidine-C-dots. The aminoguanidine C-dots are easy to prepare in large quantities and are inexpensive and biocompatible and thus may be employed as a useful vehicle for selective staining and antibacterial activity against P. aeruginosa.

Original languageEnglish
Pages (from-to)292-302
Number of pages11
JournalACS Infectious Diseases
Volume5
Issue number2
DOIs
StatePublished - 8 Feb 2019

Keywords

  • Pseudomonas aeruginosa
  • aminoguanidine
  • antibacterial materials
  • bacterial labeling
  • carbon dots

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