Activity of Cysteamine against the Cystic Fibrosis Pathogen Burkholderia cepacia Complex

Author:

Fraser-Pitt DouglasORCID,Mercer Derry,Lovie Emma,Robertson Jennifer,O'Neil Deborah

Abstract

ABSTRACTThere are no wholly successful chemotherapeutic strategies againstBurkholderia cepaciacomplex (BCC) colonization in cystic fibrosis (CF). We assessed the impact of cysteamine (Lynovex) in combination with standard-of-care CF antibioticsin vitroagainst BCC CF isolates by the concentration at which 100% of bacteria were killed (MIC100) and checkerboard assays under CLSI standard conditions. Cysteamine facilitated the aminoglycoside-, fluoroquinolone- and folate pathway inhibitor-mediated killing of BCC organisms that were otherwise resistant or intermediately sensitive to these antibiotic classes. Slow-growing BCC strains are often recalcitrant to treatment and form biofilms. In assessing the impact of cysteamine on biofilms, we demonstrated inhibition of BCC biofilm formation at sub-MIC100s of cysteamine.

Publisher

American Society for Microbiology

Subject

Infectious Diseases,Pharmacology (medical),Pharmacology

Reference30 articles.

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