1. Design of a hydroxyapatite-binding antimicrobial peptide with improved retention and antibacterial efficacy for oral pathogen control.
- Author
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Huang ZB, Shi X, Mao J, and Gong SQ
- Subjects
- Actinomyces viscosus drug effects, Actinomyces viscosus growth & development, Amino Acid Sequence, Antimicrobial Cationic Peptides chemistry, Biofilms growth & development, Cells, Cultured, Delayed-Action Preparations chemistry, Fibroblasts drug effects, Fibroblasts microbiology, Fibroblasts pathology, Gingiva cytology, Gingiva microbiology, Humans, Lactobacillus acidophilus drug effects, Lactobacillus acidophilus growth & development, Microbial Sensitivity Tests, Plankton growth & development, Protein Binding, Saliva chemistry, Saliva microbiology, Streptococcus mutans drug effects, Streptococcus mutans growth & development, Streptococcus sanguis drug effects, Streptococcus sanguis growth & development, Anti-Bacterial Agents pharmacology, Antimicrobial Cationic Peptides pharmacology, Biofilms drug effects, Delayed-Action Preparations pharmacology, Durapatite chemistry, Plankton drug effects
- Abstract
Controlling and reducing the formation of pathogenic biofilm on tooth surface is the key to the prevention and treatment of the biofilm-associated oral diseases. Antimicrobial peptides (AMPs), considered as possible future alternatives for conventional antibiotics, have been extensively studied for the control of bacterial infection. Due to the rapid dilution and degradation by human saliva, AMP preparations designed for oral use with longer retention and higher efficacy are in urgent need. To this end, a hydroxyapatite (HAp)-binding antimicrobial peptide (HBAMP), which is based on the fusion of a specific HAp-binding heptapeptide (HBP7) domain and a broad-spectrum antimicrobial peptide (KSLW) domain, has been developed in our laboratory. HBAMP was supposed to form a contact-active antibacterial interface on tooth surface to inhibit the formation of biofilms. In this study, we investigated its binding behaviour, antibacterial activity against bacteria in both planktonic and sessile states, enzymatic stability in human saliva, and cytocompatibility to human gingival fibroblasts (HGFs). Our findings suggest that HBAMP could adsorb on tooth surface to provide effective antibacterial activity with improved retention. This study provides a proof-of-concept on using conjugated molecules to promote antibacterial efficacy by synergistically actions of HBAMP free in solution and bound on tooth surface.
- Published
- 2016
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