Abstract:
:The emergence of extensively drug-resistant (XDR) Acinetobacter baumannii strains and the limited number of efficacious antibiotics demonstrate an urgent need to develop novel agents to treat infections caused by this dangerous pathogen. To find antimicrobial peptides against A. baumannii growing either in planktonic or in biofilm mode, biopanning was carried out with a peptide library on five XDR A. baumannii strains grown in the medium containing human blood (blood biopanning) and biofilms formed by these strains (biofilm biopanning). Two groups of peptides were identified, among which two peptides N10 (from blood biopanning) and NB2 (from biofilm biopanning) were selected and synthesized for more assessments. The selected peptides showed significant binding to A. baumannii rather than to the human cell line Caco-2. Both peptides were effective against A. baumannii and showed antibacterial activities (minimum inhibitory concentration (MIC) 500 μg/ml). In the biofilm inhibition assay, NB2 reduced biofilm more efficiently (75%) than N10 (50%). The combination of the two peptides could function better than each peptide alone to prevent biofilm formation by A. baumannii. Supplementation of conventional therapy with a mixture of peptides targeting A. baumannii or using peptides to deliver antibiotics specifically to the site of infection may be promising to control A. baumannii-related diseases.
journal_name
Microb Pathogjournal_title
Microbial pathogenesisauthors
Irani N,Basardeh E,Samiee F,Fateh A,Shooraj F,Rahimi A,Shahcheraghi F,Vaziri F,Masoumi M,Pazhouhandeh M,Siadat SD,Kazemi-Lomedasht F,Jamnani FRdoi
10.1016/j.micpath.2018.05.051subject
Has Abstractpub_date
2018-08-01 00:00:00pages
310-317eissn
0882-4010issn
1096-1208pii
S0882-4010(17)31780-1journal_volume
121pub_type
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journal_title:Microbial pathogenesis
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abstract:BACKGROUND:In the current healthcare environment, an alarming rise in multi-drug resistant bacterial infections has led to a global health threat. The lack of new antibiotics has created a need for developing alternative strategies. OBJECTIVE:Understanding the antibacterial mechanisms of cinnamon and its constituents ...
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