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Targeting Bacterial Biofilm: A New LecA Multivalent Ligand with Inhibitory Activity

Alessandro Palmioli1, Paola Sperandeo2, Alessandra Polissi2

  • 1Department of Biotechnology and Biosciences, University of Milano-Bicocca, Piazza della Scienza 2, 20126, Milano, Italy.

Chembiochem : a European Journal of Chemical Biology
|June 20, 2019
PubMed

Insights

A novel galactose-based dendrimer, Gal18, effectively inhibits Pseudomonas aeruginosa biofilm formation. This discovery offers a promising strategy to combat chronic infections and restore antibiotic efficacy against this concerning pathogen.

Area of Science:

  • Microbiology
  • Biochemistry
  • Drug Discovery

Background:

  • Bacterial biofilm formation is a key factor in chronic infections, leading to increased antibiotic tolerance and treatment challenges.
  • Pseudomonas aeruginosa biofilms are particularly problematic for immunocompromised individuals and cystic fibrosis patients.
  • LecA and LecB lectins of P. aeruginosa are crucial for biofilm development and represent potential therapeutic targets.

Purpose of the Study:

  • To characterize the binding of a galactose-based dendrimer (Gal18) to the P. aeruginosa lectin LecA using NMR.
  • To evaluate the efficacy of Gal18 in inhibiting P. aeruginosa biofilm formation in vitro.

Main Methods:

  • Nuclear Magnetic Resonance (NMR) spectroscopy was employed to analyze the interaction between Gal18 and LecA.
  • In vitro assays were conducted to assess the impact of Gal18 on P. aeruginosa biofilm formation.

Main Results:

  • NMR characterization confirmed the binding of the galactose-based dendrimer Gal18 to LecA.
  • The Gal18 molecule demonstrated significant inhibitory activity against P. aeruginosa biofilm formation in vitro.

Conclusions:

  • The galactose-based dendrimer Gal18 binds to P. aeruginosa LecA, a key virulence factor.
  • Gal18 shows potential as an anti-biofilm agent, offering a new approach to treating P. aeruginosa infections and enhancing antibiotic effectiveness.
Keywords:
LecANMR spectroscopybiofilm inhibitorsdendrimersmultivalency

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