Antimicrobial activity of synthetic cationic peptides and lipopeptides derived from human lactoferricin against Pseudomonas aeruginosa planktonic cultures and biofilms
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- 作者：Susana Sánchez-Gómez ; Raquel Ferrer-Espada ; Philip S. Stewart…
- 关键词：Antimicrobial peptides ; Lactoferricin ; Pseudomonas aeruginosa ; Biofilm
- 刊名：BMC Microbiology
- 出版年：2015
- 出版时间：December 2015
- 年：2015
- 卷：15
- 期：1
- 全文大小：1,481 KB
- 刊物主题：Microbiology; Biological Microscopy; Fungus Genetics; Parasitology; Virology; Life Sciences, general;
- 出版者：BioMed Central
- ISSN：1471-2180
文摘
Background Infections by Pseudomonas aeruginosa constitute a serious health threat because this pathogen –particularly when it forms biofilms – can acquire resistance to the majority of conventional antibiotics. This study evaluated the antimicrobial activity of synthetic peptides based on LF11, an 11-mer peptide derived from human lactoferricin against P. aeruginosa planktonic and biofilm-forming cells. We included in this analysis selected N-acylated derivatives of the peptides to analyze the effect of acylation in antimicrobial activity. To assess the efficacy of compounds against planktonic bacteria, microdilution assays to determine the minimal inhibitory concentration (MIC), minimum bactericidal concentration (MBC) and time-kill studies were conducted. The anti-biofilm activity of the agents was assessed on biofilms grown under static (on microplates) and dynamic (in a CDC-reactor) flow regimes.