Easy and versatile cellulosic support inhibiting broad spectrum strains: synergy between photodynamic antimicrobial therapy and polymyxin B.
Fiche publication
Date publication
février 2024
Journal
Photochemical & photobiological sciences : Official journal of the European Photochemistry Association and the European Society for Photobiology
Auteurs
Membres identifiés du Cancéropôle Est :
Dr FROCHOT Céline
Tous les auteurs :
Le Guern F, Ouk TS, Arnoux P, Frochot C, Sol V
Lien Pubmed
Résumé
Despite advances achieved in the health field over the last decade, infections caused by resistant bacterial strains are an increasingly important societal issue that needs to be addressed. New approaches have already been developed to overcome this problem. Photodynamic antimicrobial chemotherapy (PACT) could provide a promising alternative method to eradicate microbes. This approach has already inspired the development of innovative surfaces. Interesting results were achieved against Gram-positive bacteria, but it also appeared that Gram-negative strains, especially Pseudomonas aeruginosa, were less sensitive to PACT. However, materials coated with cationic porphyrins have already proven their wide-spectrum activity, but these materials were not suitable for industrial-scale production. The main aim of this work was the design of a large-scale evolutionary material based on PACT and antibiotic prophylaxis. Transparent regenerated cellulose has been simply impregnated with a usual cationic porphyrin (N-methylpyridyl) and an antimicrobial peptide (polymyxin B). In addition to its photophysical properties, this film exhibited a wide-spectrum bactericidal activity over 4 days despite daily application of fresh bacterial inoculums. The efficiency of PACT and polymyxin B combination could help to reduce the emergence of bacterial multi-resistant strains and we believe that this kind of material would provide an excellent opportunity to prevent bacterial contamination of bandages or packaging.
Mots clés
Antimicrobial peptide, Cationic porphyrin, PACT, Polymyxin B, Polysaccharidic surface
Référence
Photochem Photobiol Sci. 2024 02 1;: