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  • Title: Antibacterial efficacy of casein-derived peptides against Enterococcus faecalis.
    Author: Liu V, Dashper S, Parashos P, Liu SW, Stanton D, Shen P, Chivatxaranukul P, Reynolds EC.
    Journal: Aust Dent J; 2012 Sep; 57(3):339-43. PubMed ID: 22924358.
    Abstract:
    BACKGROUND: The aim of this study was to test a casein peptide in its glycosylated form (kappa-casein glycopeptide, KCGP) and its non-glycosylated form (kappa-casein peptide, KCP) for antibacterial efficacy against Enterococcus faecalis in planktonic and biofilm cultures. METHODS: E. faecalis strain JKD 15036 was exposed to different concentrations of KCGP and KCP in a 96-well culture plate. The effect of the peptides on the growth of E. faecalis in planktonic culture was monitored by measuring optical density over 7 hours. Biofilm formation was measured after 24 hours using a crystal violet assay. All experiments were performed in triplicate. RESULTS: KCGP and KCP inhibited growth of E. faecalis in planktonic culture with no significant difference in activity between the peptides. KCGP at 0.16% w/v was significantly better at inhibiting E. faecalis biofilm formation than KCP at the same concentration and significantly better than NaOCl at 1.0% w/v. CONCLUSIONS: KCGP effectively inhibited E. faecalis biofilm formation and may have potential to augment the efficacy of traditional antiseptic agents.
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