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Regis P Kowalski, Eric G Romanowski, Kathleen A Yates, Francis S Mah
OBJECTIVE: Brilacidin (BRI), a novel defensin mimetic, was evaluated as an ocular anti-infective. METHODS: In vitro: Potency based on MIC90s was compared for 50 Staphylococcus aureus (SA), 50 Staphylococcus epidermidis (SE), and 25 each of Streptococcus pneumonia (SP), Streptococcus viridans (SV), Moraxella (MS), Haemophilus influenzae (HI), Pseudomonas aeruginosa (PA), and Serratia marcescens (SM). In vivo: Using established methods, ocular toxicity was graded with Draize testing...
January 2016: Journal of Ocular Pharmacology and Therapeutics
Bruk Mensa, Gabriella L Howell, Richard Scott, William F DeGrado
Brilacidin (PMX30063) has shown potent bactericidal activity against drug-resistant and -susceptible strains of multiple Gram-negative and Gram-positive pathogens. In this study, we demonstrate that brilacidin causes membrane depolarization in the Gram-positive bacterium Staphylococcus aureus, to an extent comparable to that caused by the lipopeptidic drug daptomycin. Transcriptional profiling of Staphylococcus aureus by deep sequencing shows that the global response to brilacidin treatment is well correlated to those of treatment with daptomycin and the cationic antimicrobial peptide LL37 and mostly indicates abrogation of cell wall and membrane functions...
September 2014: Antimicrobial Agents and Chemotherapy
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