Yan Yang1,2, Lingyun Xia3, Markus Haapasalo2, Wei Wei1, Duo Zhang2, Jingzhi Ma4, Ya Shen5. 1. Department of Stomatology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China. 2. Faculty of Dentistry, Division of Endodontics, Department of Oral Biological and Medical Sciences, University of British Columbia, 2199 Wesbrook Mall, Vancouver, BC, V6T 1Z3, Canada. 3. Department of Stomatology, Taihe hospital, Hubei University of Medicine, Shiyan, China. 4. Department of Stomatology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China. majingzhi2002@163.com. 5. Faculty of Dentistry, Division of Endodontics, Department of Oral Biological and Medical Sciences, University of British Columbia, 2199 Wesbrook Mall, Vancouver, BC, V6T 1Z3, Canada. yashen@dentistry.ubc.ca.
Abstract
OBJECTIVES: Novel synthetic antimicrobial peptides which consist of a new immunomodulatory peptide 1018 and two different modifications with hydroxyapatite-binding affinity were developed. We compared the effect(s) of these peptides against oral plaque biofilms and measured their effectiveness in killing biofilm microbes and in reducing biofilm volume. MATERIALS AND METHODS: The high affinity hydroxyapatite (HA)-binding peptide 1018 (SHABP), the mild affinity HA-binding peptide 1018 (MHABP), and peptide 1018 without additional amino acid sequence (peptide 1018) were synthesized. Oral multispecies biofilms were grown anaerobically for 3 days. The biofilms were exposed to three peptides at two different concentrations (0.65 and 3.25 μmol/L) for 24, 48, and 72 h. The biofilms were also treated for 3 or 9 min with the peptides (3.25 μmol/L). The percentage of killed biofilm bacteria and biofilm volume were determined by using LIVE/DEAD viability staining and confocal laser scanning microscopy. RESULTS: SHABP was superior to MHABP and peptide 1018 in its killing efficacy of the pre-formed biofilms, especially at concentration of 3.25 μmol/L (p < 0.05). SHABP performed also better than MHABP and peptide 1018 in reducing the overall biofilm volume at both concentrations (p < 0.05). During the 3 days of long-term exposure, MHABP and peptide 1080 killed more bacteria in the top half of the biofilms, compared to bottom half. SHABP killed more bacteria in the bottom half (39%) of the biofilms than in the top half (29%) at day 1 (p < 0.05), whereas more bacteria were killed in the upper layers on days 2 and 3. SHABP killed a much higher percentage of plaque biofilm bacteria when used on 3-day-old biofilms for one or three times for 3 min than MHABP or peptide 1018 at high concentration (p < 0.05). CONCLUSIONS: The modified peptide 1018 with high HA-binding affinity had higher antimicrobial activity against biofilm microbes and reduced biofilm volume more than the other peptides tested. CLINICAL RELEVANCE: Modified peptide 1018 with high hydroxyapatite-binding affinity is a promising agent for use in oral antibiofilm strategies in the future.
OBJECTIVES: Novel synthetic antimicrobial peptides which consist of a new immunomodulatory peptide 1018 and two different modifications with hydroxyapatite-binding affinity were developed. We compared the effect(s) of these peptides against oral plaque biofilms and measured their effectiveness in killing biofilm microbes and in reducing biofilm volume. MATERIALS AND METHODS: The high affinity hydroxyapatite (HA)-binding peptide 1018 (SHABP), the mild affinity HA-binding peptide 1018 (MHABP), and peptide 1018 without additional amino acid sequence (peptide 1018) were synthesized. Oral multispecies biofilms were grown anaerobically for 3 days. The biofilms were exposed to three peptides at two different concentrations (0.65 and 3.25 μmol/L) for 24, 48, and 72 h. The biofilms were also treated for 3 or 9 min with the peptides (3.25 μmol/L). The percentage of killed biofilm bacteria and biofilm volume were determined by using LIVE/DEAD viability staining and confocal laser scanning microscopy. RESULTS: SHABP was superior to MHABP and peptide 1018 in its killing efficacy of the pre-formed biofilms, especially at concentration of 3.25 μmol/L (p < 0.05). SHABP performed also better than MHABP and peptide 1018 in reducing the overall biofilm volume at both concentrations (p < 0.05). During the 3 days of long-term exposure, MHABP and peptide 1080 killed more bacteria in the top half of the biofilms, compared to bottom half. SHABP killed more bacteria in the bottom half (39%) of the biofilms than in the top half (29%) at day 1 (p < 0.05), whereas more bacteria were killed in the upper layers on days 2 and 3. SHABP killed a much higher percentage of plaque biofilm bacteria when used on 3-day-old biofilms for one or three times for 3 min than MHABP or peptide 1018 at high concentration (p < 0.05). CONCLUSIONS: The modified peptide 1018 with high HA-binding affinity had higher antimicrobial activity against biofilm microbes and reduced biofilm volume more than the other peptides tested. CLINICAL RELEVANCE: Modified peptide 1018 with high hydroxyapatite-binding affinity is a promising agent for use in oral antibiofilm strategies in the future.
Authors: Mustafa Gungormus; Hanson Fong; Il Won Kim; John Spencer Evans; Candan Tamerler; Mehmet Sarikaya Journal: Biomacromolecules Date: 2008-02-14 Impact factor: 6.988
Authors: Mitzi R Becker; Bruce J Paster; Eugene J Leys; Melvin L Moeschberger; Sarah G Kenyon; Jamie L Galvin; Susan K Boches; Floyd E Dewhirst; Ann L Griffen Journal: J Clin Microbiol Date: 2002-03 Impact factor: 5.948
Authors: E Margo Molhoek; Albert van Dijk; Edwin J A Veldhuizen; Henk P Haagsman; Floris J Bikker Journal: Peptides Date: 2011-03-02 Impact factor: 3.750
Authors: Magdalena Sieprawska-Lupa; Piotr Mydel; Katarzyna Krawczyk; Kinga Wójcik; Magdalena Puklo; Boguslaw Lupa; Piotr Suder; Jerzy Silberring; Matthew Reed; Jan Pohl; William Shafer; Fionnuala McAleese; Timothy Foster; Jim Travis; Jan Potempa Journal: Antimicrob Agents Chemother Date: 2004-12 Impact factor: 5.191
Authors: L C N Brito; F R Teles; R P Teles; E C França; A P Ribeiro-Sobrinho; A D Haffajee; S S Socransky Journal: J Clin Microbiol Date: 2007-07-18 Impact factor: 5.948