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2017 ; 61
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): ä Nephropedia Template TP
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Glycoside Hydrolases Degrade Polymicrobial Bacterial Biofilms in Wounds
#MMPMID27872074
Fleming D
; Chahin L
; Rumbaugh K
Antimicrob Agents Chemother
2017[Feb]; 61
(2
): ä PMID27872074
show ga
The persistent nature of chronic wounds leaves them highly susceptible to
invasion by a variety of pathogens that have the ability to construct an
extracellular polymeric substance (EPS). This EPS makes the bacterial population,
or biofilm, up to 1,000-fold more antibiotic tolerant than planktonic cells and
makes wound healing extremely difficult. Thus, compounds which have the ability
to degrade biofilms, but not host tissue components, are highly sought after for
clinical applications. In this study, we examined the efficacy of two glycoside
hydrolases, ?-amylase and cellulase, which break down complex polysaccharides, to
effectively disrupt Staphylococcus aureus and Pseudomonas aeruginosa monoculture
and coculture biofilms. We hypothesized that glycoside hydrolase therapy would
significantly reduce EPS biomass and convert bacteria to their planktonic state,
leaving them more susceptible to conventional antimicrobials. Treatment of S.
aureus and P. aeruginosa biofilms, grown in vitro and in vivo, with solutions of
?-amylase and cellulase resulted in significant reductions in biomass,
dissolution of the biofilm, and an increase in the effectiveness of subsequent
antibiotic treatments. These data suggest that glycoside hydrolase therapy
represents a potential safe, effective, and new avenue of treatment for
biofilm-related infections.