期刊
WORLD JOURNAL OF MICROBIOLOGY & BIOTECHNOLOGY
卷 32, 期 2, 页码 -出版社
SPRINGER
DOI: 10.1007/s11274-015-1988-x
关键词
Antimicrobial peptide; Biofilm; Burkholderia pseudomallei; LFchimera; (Immune) electron microscopy; Melioidosis
资金
- Commission on Higher Education granting under the CHE-Ph.D.-SW
- Higher Education Research Promotion and National Research University Project of Thailand
- Office of the Higher Education Commission, through the Health Cluster (SHeP-GMS), Khon Kaen University
- University of Amsterdam
Lactoferrin chimera (LFchimera), a hybrid peptide containing the two antimicrobial stretches of the innate immunity factor bovine lactoferrin, viz. LFamp-in265-284 and LFcin17-30, has strikingly high antimicrobial activity against the category B pathogen Burkholderia pseudomallei. The action mechanisms of LFchimera against B. pseudomallei is not fully understood. The aim of this study was to further investigate the effect of treated B. pseudomallei with LFchimera using (immune) electron microscopy. The effects of LFchimera on biofilm formation and against preformed biofilm of B. pseudomallei were also determined. After exposure to LFchimera, transmission electron microscopy revealed swelling of the periplasmic space of B. pseudomallei and a highly inhomogeneous electron density in the intracellular DNA region. Localization of LFchimera in B. pseudomallei using immunoelectron microscopy showed gold particles in intracellular structures without accumulation on the membranes. LFchimera also possessed stronger bactericidal activity than ceftazidime against B. pseudomallei grown in biofilm. Moreover, limited exposure of B. pseudomallei to LFchimera at subcidal concentration could reduce biofilm formation. Altogether, the results indicate that LFchimera possesses antibacterial and antibiofilm activities and can modulate B. pseudomallei colonization. Therefore, the efficacy of LFchimera merits further development of this agent for the therapy of melioidosis.
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