Anti-Staphylococcal Biofilm Effects of Human Cathelicidin Peptides

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• 作者：Biswajit Mishra ; Radha M. Golla ; Kyle Lau ; Tamara Lushnikova ; Guangshun Wang
• 刊名：ACS Medicinal Chemistry Letters
• 出版年：2016
• 出版时间：January 14, 2016
• 年：2016
• 卷：7
• 期：1
• 页码：117-121
• 全文大小：406K
• ISSN：1948-5875

文摘

Staphylococcus aureus can live together in the form of biofilms to avoid elimination by the host. Thus, a useful strategy to counteract bacterial biofilms is to re-engineer human antimicrobial peptide LL-37 so that it can be used as a remedy for preventing and removing biofilms. This study reports antibiofilm effects of four human cathelicidin LL-37 peptides against community-associated and hospital isolated methicillin-resistant Staphylococcus aureus (MRSA) strains. Although the intact molecule LL-37 inhibited biofilm formation at low concentrations, it did not inhibit bacterial attachment nor disrupt preformed biofilms. However, two 17-residue peptides, GF-17 and 17BIPHE2, inhibited bacterial attachment, biofilm growth, and disrupted established biofilms. An inactive peptide RI-10 was used as a negative control. Our results obtained using the S. aureus mutants in a static biofilm model are consistent with the literature obtained in a flow cell biofilm model. Because 17BIPHE2 is the most effective biofilm disruptor with desired stability to proteases, it is a promising lead for developing new anti-MRSA biofilm agents.