Richter Katharina, Thomas Nicky, Claeys Jolien, McGuane Jonathan, Prestidge Clive A, Coenye Tom, Wormald Peter-John, Vreugde Sarah
Department of Surgery, Otolaryngology Head and Neck Surgery, Basil Hetzel Institute for Translational Health Research, The University of Adelaide, Adelaide, South Australia, Australia.
School of Pharmacy and Medical Sciences, University of South Australia, Adelaide, South Australia, Australia.
Antimicrob Agents Chemother. 2017 May 24;61(6). doi: 10.1128/AAC.00481-17. Print 2017 Jun.
Many infectious diseases are associated with multidrug-resistant (MDR) bacteria residing in biofilms that require high antibiotic concentrations. While oral drug delivery is frequently ineffective, topical treatments have the potential to deliver higher drug concentrations to the infection site while reducing systemic side effects. This study determined the antibiofilm activity of a surgical wound gel loaded with the iron chelator deferiprone (Def) and the heme analogue gallium-protoporphyrin (GaPP), alone and in combination with ciprofloxacin. Activity against MDR , , , and biofilms was assessed in the colony biofilm and artificial wound model by enumeration of CFU and correlative light/electron microscopy. While biofilms were equally susceptible to GaPP and Def-GaPP gels (log reduction of 3.8 and 3.7, respectively), the Def-GaPP combination was crucial for significant activity against biofilms (log reduction of 1.3 for GaPP and 3.3 for Def-GaPP). When Def-GaPP gel was combined with ciprofloxacin, the efficacy exceeded the activity of the individual compounds. Def-GaPP delivered in a surgical wound gel showed significant antibiofilm activity against different MDR strains and could enhance the gel's wound-healing properties. Moreover, Def-GaPP indicated a potentiation of ciprofloxacin. This antibiofilm strategy has potential for clinical utilization as a therapy for topical biofilm-related infections.
Antimicrob Agents Chemother. 2017-5-24
Front Cell Infect Microbiol. 2017-6-22
Int Forum Allergy Rhinol. 2016-7
Materials (Basel). 2024-2-7
ACS Infect Dis. 2019-9-13
Tuberculosis (Edinb). 2023-9
Antimicrob Agents Chemother. 2019-3-27
Front Cell Infect Microbiol. 2025-5-15
Materials (Basel). 2024-2-7
Int Wound J. 2023-10-31
J Mater Chem B. 2015-4-14
Essays Biochem. 2017-3-3
J Biol Chem. 2016-6-10
Int Forum Allergy Rhinol. 2016-7
Trends Microbiol. 2014-3-2