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Xu W, Yu F, Addison O, Zhang B, Guan F, Zhang R, Hou B, Sand W. Microbial corrosion of metallic biomaterials in the oral environment. Acta Biomater 2024:S1742-7061(24)00346-5. [PMID: 38942189 DOI: 10.1016/j.actbio.2024.06.032] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2024] [Revised: 05/29/2024] [Accepted: 06/21/2024] [Indexed: 06/30/2024]
Abstract
A wide variety of microorganisms have been closely linked to metal corrosion in the form of adherent surface biofilms. Biofilms allow the development and maintenance of locally corrosive environments and/or permit direct corrosion including pitting corrosion. The presence of numerous genetically distinct microorganisms in the oral environment poses a threat to the integrity and durability of the surface of metallic prostheses and implants used in routine dentistry. However, the association between oral microorganisms and specific corrosion mechanisms is not clear. It is of practical importance to understand how microbial corrosion occurs and the associated risks to metallic materials in the oral environment. This knowledge is also important for researchers and clinicians who are increasingly concerned about the biological activity of the released corrosion products. Accordingly, the main goal was to comprehensively review the current literature regarding oral microbiologically influenced corrosion (MIC) including characteristics of biofilms and of the oral environment, MIC mechanisms, corrosion behavior in the presence of oral microorganisms and potentially mitigating technologies. Findings included that oral MIC has been ascribed mostly to aggressive metabolites secreted during microbial metabolism (metabolite-mediated MIC). However, from a thermodynamic point of view, extracellular electron transfer mechanisms (EET-MIC) through pili or electron transfer compounds cannot be ruled out. Various MIC mitigating methods have been demonstrated to be effective in short term, but long term evaluations are necessary before clinical applications can be considered. Currently most in-vitro studies fail to simulate the complexity of intraoral physiological conditions which may either reduce or exacerbate corrosion risk, which must be addressed in future studies. STATEMENT OF SIGNIFICANCE: A thorough analysis on literature regarding oral MIC (microbiologically influenced corrosion) of biomedical metallic materials has been carried out, including characteristics of oral environment, MIC mechanisms, corrosion behaviors in the presence of typical oral microorganisms and potential mitigating methods (materials design and surface design). There is currently a lack of mechanistic understanding of oral MIC which is very important not only to corrosion researchers but also to dentists and clinicians. This paper discusses the significance of biofilms from a biocorrosion perspective and summarizes several aspects of MIC mechanisms which could be caused by oral microorganisms. Oral MIC has been closely associated with not only the materials research but also the dental/clinical research fields in this work.
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Affiliation(s)
- Weichen Xu
- Key Laboratory of Advanced Marine Materials, Key Laboratory of Marine Environmental Corrosion and Bio-fouling, Institute of Oceanology, Chinese Academy of Sciences, 7 Nanhai Road, Qingdao 266071, China; Institute of Marine Corrosion Protection, Guangxi Academy of Sciences, 98 Daling Road, Nanning 530007, China.
| | - Fei Yu
- School of Basic Medicine, Qingdao Medical College, Qingdao University, 308 Ningxia Road, Qingdao 266021, China.
| | - Owen Addison
- Centre for Oral Clinical Translational Science, Faculty of Dentistry Oral and Craniofacial Sciences, King's College London, Strand, London WC2R 2LS, United Kingdom
| | - Binbin Zhang
- Key Laboratory of Advanced Marine Materials, Key Laboratory of Marine Environmental Corrosion and Bio-fouling, Institute of Oceanology, Chinese Academy of Sciences, 7 Nanhai Road, Qingdao 266071, China; Institute of Marine Corrosion Protection, Guangxi Academy of Sciences, 98 Daling Road, Nanning 530007, China
| | - Fang Guan
- Key Laboratory of Advanced Marine Materials, Key Laboratory of Marine Environmental Corrosion and Bio-fouling, Institute of Oceanology, Chinese Academy of Sciences, 7 Nanhai Road, Qingdao 266071, China; Institute of Marine Corrosion Protection, Guangxi Academy of Sciences, 98 Daling Road, Nanning 530007, China
| | - Ruiyong Zhang
- Key Laboratory of Advanced Marine Materials, Key Laboratory of Marine Environmental Corrosion and Bio-fouling, Institute of Oceanology, Chinese Academy of Sciences, 7 Nanhai Road, Qingdao 266071, China; Institute of Marine Corrosion Protection, Guangxi Academy of Sciences, 98 Daling Road, Nanning 530007, China
| | - Baorong Hou
- Key Laboratory of Advanced Marine Materials, Key Laboratory of Marine Environmental Corrosion and Bio-fouling, Institute of Oceanology, Chinese Academy of Sciences, 7 Nanhai Road, Qingdao 266071, China; Institute of Marine Corrosion Protection, Guangxi Academy of Sciences, 98 Daling Road, Nanning 530007, China
| | - Wolfgang Sand
- Key Laboratory of Advanced Marine Materials, Key Laboratory of Marine Environmental Corrosion and Bio-fouling, Institute of Oceanology, Chinese Academy of Sciences, 7 Nanhai Road, Qingdao 266071, China; Biofilm Centre, University of Duisburg-Essen, 45141 Essen, Germany
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2
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Abram AM, Szewczyk MM, Park SG, Sam SS, Eldana HB, Koria FJ, Ferracciolo JM, Young LA, Qadir H, Bonham AJ, Yang F, Zora JS, Abdulelah SA, Patel NA, Koleilat A, Saleh MA, Alhabeil JA, Khan S, Tripathi A, Palanci JG, Krukonis ES. A Co-Association of Streptococcus mutans and Veillonella parvula/dispar in Root Caries Patients and In Vitro Biofilms. Infect Immun 2022; 90:e0035522. [PMID: 36129298 PMCID: PMC9584289 DOI: 10.1128/iai.00355-22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Root caries in geriatric patients is a growing problem as more people are maintaining their natural teeth into advanced age. We determined the levels of various bacterial species previously implicated in root caries disease or health using quantitative real-time PCR in a pilot study of 7 patients with 1 to 4 root caries lesions per person. Levels of 12 different species on diseased roots compared to healthy (contralateral control) roots were measured. Four species were found at significantly higher levels on diseased roots (Streptococcus mutans, Veillonella parvula/dispar, Actinomyces naeslundii/viscosus, and Capnocytophaga granulosa) compared across all plaque samples. The level of colonization by these species varied dramatically (up to 1,000-fold) between patients, indicating different patients have different bacteria contributing to root caries disease. Neither of the two species previously reported to correlate with healthy roots (C. granulosa and Delftia acidovorans) showed statistically significant protective roles in our population, although D. acidovorans showed a trend toward higher levels on healthy teeth (P = 0.08). There was a significant positive correlation between higher levels of S. mutans and V. parvula/dispar on the same diseased teeth. In vitro mixed biofilm studies demonstrated that co-culturing S. mutans and V. parvula leads to a 50 to 150% increase in sucrose-dependent biofilm mass compared to S. mutans alone, depending on the growth conditions, while V. parvula alone did not form in vitro biofilms. The presence of V. parvula also decreased the acidification of S. mutans biofilms when grown in artificial saliva and enhanced the health of mixed biofilms.
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Affiliation(s)
- Amber M. Abram
- Department of Biology, University of Detroit Mercy, Detroit, Michigan, USA
| | | | - Seon G. Park
- University of Detroit Mercy School of Dentistry, Detroit, Michigan, USA
| | - Sumita S. Sam
- University of Detroit Mercy School of Dentistry, Detroit, Michigan, USA
| | - Haya B. Eldana
- Department of Biology, University of Detroit Mercy, Detroit, Michigan, USA
| | - Fadi J. Koria
- Department of Biology, University of Detroit Mercy, Detroit, Michigan, USA
| | | | - Laura A. Young
- University of Detroit Mercy School of Dentistry, Detroit, Michigan, USA
| | - Hina Qadir
- University of Detroit Mercy School of Dentistry, Detroit, Michigan, USA
| | - Aaron J. Bonham
- Department of Surgery, University of Michigan School of Medicine, Ann Arbor, Michigan, USA
| | - Fei Yang
- Natural Products Discovery Core, University of Michigan, Ann Arbor, Michigan, USA
| | - Jonathan S. Zora
- University of Detroit Mercy School of Dentistry, Detroit, Michigan, USA
| | - Sara A. Abdulelah
- University of Detroit Mercy School of Dentistry, Detroit, Michigan, USA
| | - Neil A. Patel
- University of Detroit Mercy School of Dentistry, Detroit, Michigan, USA
| | - Ayah Koleilat
- University of Detroit Mercy School of Dentistry, Detroit, Michigan, USA
| | - Malaka A. Saleh
- University of Detroit Mercy School of Dentistry, Detroit, Michigan, USA
| | - Jamal A. Alhabeil
- University of Detroit Mercy School of Dentistry, Detroit, Michigan, USA
| | - Shameel Khan
- University of Detroit Mercy School of Dentistry, Detroit, Michigan, USA
| | - Ashootosh Tripathi
- Natural Products Discovery Core, University of Michigan, Ann Arbor, Michigan, USA
| | - John G. Palanci
- Division of Restorative Dentistry, University of Detroit Mercy School of Dentistry, Detroit, Michigan, USA
| | - Eric S. Krukonis
- Division of Integrated Biomedical Sciences, University of Detroit Mercy School of Dentistry, Detroit, Michigan, USA
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3
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Bacteriocin Producing Bacteria Isolated from Turkish Traditional Sausage Samples. JOURNAL OF PURE AND APPLIED MICROBIOLOGY 2020. [DOI: 10.22207/jpam.14.2.55] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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4
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Rombouts JL, Kranendonk EMM, Regueira A, Weissbrodt DG, Kleerebezem R, van Loosdrecht MCM. Selecting for lactic acid producing and utilising bacteria in anaerobic enrichment cultures. Biotechnol Bioeng 2020; 117:1281-1293. [PMID: 32034763 PMCID: PMC7187302 DOI: 10.1002/bit.27301] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2019] [Revised: 01/27/2020] [Accepted: 02/07/2020] [Indexed: 01/23/2023]
Abstract
Lactic acid‐producing bacteria are important in many fermentations, such as the production of biobased plastics. Insight in the competitive advantage of lactic acid bacteria over other fermentative bacteria in a mixed culture enables ecology‐based process design and can aid the development of sustainable and energy‐efficient bioprocesses. Here we demonstrate the enrichment of lactic acid bacteria in a controlled sequencing batch bioreactor environment using a glucose‐based medium supplemented with peptides and B vitamins. A mineral medium enrichment operated in parallel was dominated by Ethanoligenens species and fermented glucose to acetate, butyrate and hydrogen. The complex medium enrichment was populated by Lactococcus, Lactobacillus and Megasphaera species and showed a product spectrum of acetate, ethanol, propionate, butyrate and valerate. An intermediate peak of lactate was observed, showing the simultaneous production and consumption of lactate, which is of concern for lactic acid production purposes. This study underlines that the competitive advantage for lactic acid‐producing bacteria primarily lies in their ability to attain a high biomass specific uptake rate of glucose, which was two times higher for the complex medium enrichment when compared to the mineral medium enrichment. The competitive advantage of lactic acid production in rich media can be explained using a resource allocation theory for microbial growth processes.
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Affiliation(s)
| | | | - Alberte Regueira
- Department of Chemical Engineering, Institute of Technology, Universidade de Santiago Compostela, Santiago de Compostela, Spain
| | | | - Robbert Kleerebezem
- Department of Biotechnology, Delft University of Technology, Delft, The Netherlands
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5
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Kim KI, Kim DA, Patel KD, Shin US, Kim HW, Lee JH, Lee HH. Carbon nanotube incorporation in PMMA to prevent microbial adhesion. Sci Rep 2019; 9:4921. [PMID: 30894673 PMCID: PMC6427005 DOI: 10.1038/s41598-019-41381-0] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2018] [Accepted: 03/07/2019] [Indexed: 12/23/2022] Open
Abstract
Although PMMA-based biomaterials are widely used in clinics, a major hurdle, namely, their poor antimicrobial (i.e., adhesion) properties, remains and can accelerate infections. In this study, carboxylated multiwalled carbon nanotubes (CNTs) were incorporated into poly(methyl methacrylate) (PMMA) to achieve drug-free antimicrobial adhesion properties. After characterizing the mechanical/surface properties, the anti-adhesive effects against 3 different oral microbial species (Staphylococcus aureus, Streptococcus mutans, and Candida albicans) were determined for roughened and highly polished surfaces using metabolic activity assays and staining for recognizing adherent cells. Carboxylated multiwalled CNTs were fabricated and incorporated into PMMA. Total fracture work was enhanced for composites containing 1 and 2% CNTs, while other mechanical properties were gradually compromised with the increase in the amount of CNTs incorporated. However, the surface roughness and water contact angle increased with increasing CNT incorporation. Significant anti-adhesive effects (35~95%) against 3 different oral microbial species without cytotoxicity to oral keratinocytes were observed for the 1% CNT group compared to the PMMA control group, which was confirmed by microorganism staining. The anti-adhesive mechanism was revealed as a disconnection of sequential microbe chains. The drug-free antimicrobial adhesion properties observed in the CNT-PMMA composite suggest the potential utility of CNT composites as future antimicrobial biomaterials for preventing microbial-induced complications in clinical settings (i.e., Candidiasis).
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Affiliation(s)
- Kyoung-Im Kim
- Department of Biomaterials Science, School of Dentistry, Dankook University, Cheonan, 31116, South Korea
| | - Dong-Ae Kim
- Department of Biomaterials Science, School of Dentistry, Dankook University, Cheonan, 31116, South Korea.,Institute of Tissue Regeneration Engineering (ITREN), Dankook University, Cheonan, 31116, South Korea.,Department of Dental Hygiene, Kyungwoon University, Gumi-si, South Korea
| | - Kapil D Patel
- Institute of Tissue Regeneration Engineering (ITREN), Dankook University, Cheonan, 31116, South Korea.,Department of Nanobiomedical Science & BK21 PLUS NBM Global Research Center for Regenerative Medicine Research Center, Dankook University, Cheonan, 31116, South Korea.,UCL Eastman-Korea Dental Medicine Innovation Centre, Dankook University, Cheonan, 31116, Republic of Korea
| | - Ueon Sang Shin
- Institute of Tissue Regeneration Engineering (ITREN), Dankook University, Cheonan, 31116, South Korea.,Department of Nanobiomedical Science & BK21 PLUS NBM Global Research Center for Regenerative Medicine Research Center, Dankook University, Cheonan, 31116, South Korea
| | - Hae-Won Kim
- Department of Biomaterials Science, School of Dentistry, Dankook University, Cheonan, 31116, South Korea.,Institute of Tissue Regeneration Engineering (ITREN), Dankook University, Cheonan, 31116, South Korea.,Department of Nanobiomedical Science & BK21 PLUS NBM Global Research Center for Regenerative Medicine Research Center, Dankook University, Cheonan, 31116, South Korea.,UCL Eastman-Korea Dental Medicine Innovation Centre, Dankook University, Cheonan, 31116, Republic of Korea
| | - Jung-Hwan Lee
- Department of Biomaterials Science, School of Dentistry, Dankook University, Cheonan, 31116, South Korea. .,Institute of Tissue Regeneration Engineering (ITREN), Dankook University, Cheonan, 31116, South Korea. .,Department of Nanobiomedical Science & BK21 PLUS NBM Global Research Center for Regenerative Medicine Research Center, Dankook University, Cheonan, 31116, South Korea. .,UCL Eastman-Korea Dental Medicine Innovation Centre, Dankook University, Cheonan, 31116, Republic of Korea.
| | - Hae-Hyoung Lee
- Department of Biomaterials Science, School of Dentistry, Dankook University, Cheonan, 31116, South Korea. .,Institute of Tissue Regeneration Engineering (ITREN), Dankook University, Cheonan, 31116, South Korea. .,UCL Eastman-Korea Dental Medicine Innovation Centre, Dankook University, Cheonan, 31116, Republic of Korea.
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6
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Multifaceted roles of environmental factors toward dental implant performance: Observations from clinical retrievals and in vitro testing. Dent Mater 2018; 34:e265-e279. [DOI: 10.1016/j.dental.2018.08.299] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2018] [Revised: 06/16/2018] [Accepted: 08/29/2018] [Indexed: 12/27/2022]
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7
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Figueiredo‐Pina CG, Guedes M, Sequeira J, Pinto D, Bernardo N, Carneiro C. On the influence of
Streptococcus salivarius
on the wear response of dental implants: An
in vitro
study. J Biomed Mater Res B Appl Biomater 2018; 107:1393-1399. [DOI: 10.1002/jbm.b.34231] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2017] [Revised: 07/09/2018] [Accepted: 08/02/2018] [Indexed: 11/11/2022]
Affiliation(s)
- Célio G. Figueiredo‐Pina
- CDP2T and Department of Mechanical EngineeringSetúbal School of Technology, Instituto Politécnico de Setúbal Campus IPS, Estefanilha, 2914‐761 Setúbal Portugal
- CeFEMAInstituto Superior Técnico ULisboa; Av. Rovisco Pais 1, 1049‐001 Lisbon Portugal
- Centro de investigação Interdisciplinar Egas MonizInstituto Universitário Egas Moniz Quinta da Granja, Monte de Caparica, 2829‐511 Caparica Portugal
| | - Mafalda Guedes
- CDP2T and Department of Mechanical EngineeringSetúbal School of Technology, Instituto Politécnico de Setúbal Campus IPS, Estefanilha, 2914‐761 Setúbal Portugal
- CeFEMAInstituto Superior Técnico ULisboa; Av. Rovisco Pais 1, 1049‐001 Lisbon Portugal
| | - Joana Sequeira
- Setúbal School of TechnologyInstituto Politécnico de Setúbal Campus IPS, Estefanilha, 2914‐761 Setúbal Portugal
| | - Diana Pinto
- Setúbal School of TechnologyInstituto Politécnico de Setúbal Campus IPS, Estefanilha, 2914‐761 Setúbal Portugal
| | - Nuno Bernardo
- Setúbal School of TechnologyInstituto Politécnico de Setúbal Campus IPS, Estefanilha, 2914‐761 Setúbal Portugal
| | - Carla Carneiro
- Department of Systems and InformaticsSetúbal School of Technology, Instituto Politécnico de Setúbal Campus IPS, Estefanilha, 2914‐761 Setúbal Portugal
- LAQV, REQUIMTEFaculdade de Ciências e Tecnologia, Universidade Nova de Lisboa 2829‐516 Caparica Portugal
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8
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Jun SK, Yang SA, Kim YJ, El-Fiqi A, Mandakhbayar N, Kim DS, Roh J, Sauro S, Kim HW, Lee JH, Lee HH. Multi-functional nano-adhesive releasing therapeutic ions for MMP-deactivation and remineralization. Sci Rep 2018; 8:5663. [PMID: 29618810 PMCID: PMC5884793 DOI: 10.1038/s41598-018-23939-6] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2017] [Accepted: 03/23/2018] [Indexed: 11/24/2022] Open
Abstract
Restoration of hard tissue in conjunction with adhesive is a globally challenging issue in medicine and dentistry. Common clinical therapies involving application of adhesive and substitute material for functional or anatomical recovery are still suboptimal. Biomaterials with bioactivity and inhibitory effects of enzyme-mediated adhesive degradation can render a solution to this. Here, we designed a novel copper-doped bioactive glass nanoparticles (CuBGn) to offer multifunction: metalloproteinases (MMP) deactivation and remineralization and incorporated the CuBGn in resin-dentin adhesive systems, which showed most common failure of MMP mediated adhesive degradation among hard tissue adhesives, to evaluate proposed therapeutic effects. A sol-gel derived bioactive glass nanoparticles doping 10 wt% of Cu (Cu-BGn) for releasing Cu ions, which were well-known MMP deactivator, were successfully created and included in light-curing dental adhesive (DA), a filler-free co-monomer resin blend, at different concentrations (up to 2 wt%). These therapeutic adhesives (CuBGn-DA) showed enhanced (a)cellular bioactivity, cytocompatibility, microtensile bond strength and MMP deactivation-ability. In conclusion, the incorporation of Cu ions releasing nano-bioactive glass demonstrated multifunctional properties at the resin-dentin interface; MMP deactivation and remineralization, representing a suitable strategy to extend the longevity of adhesive-hard tissue (i.e. resin-dentin) interfaces.
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Affiliation(s)
- Soo-Kyung Jun
- Department of Dental Hygiene, Kyungdong University, Wonju 26495, South Korea.,Department of Biomaterials Science, School of Dentistry, Dankook University, Cheonan 31116, South Korea.,Institute of Tissue Regeneration Engineering (ITREN), Dankook University, Cheonan, 31116, South Korea
| | - Sun-A Yang
- Lithuanian University of health sciences, Kaunas, 44307, Lithuania
| | - You-Jin Kim
- Department of Biomaterials Science, School of Dentistry, Dankook University, Cheonan 31116, South Korea
| | - Ahmed El-Fiqi
- Institute of Tissue Regeneration Engineering (ITREN), Dankook University, Cheonan, 31116, South Korea.,Glass Research Department, National Research centre, Cairo, 12622, Egypt
| | - Nandin Mandakhbayar
- Institute of Tissue Regeneration Engineering (ITREN), Dankook University, Cheonan, 31116, South Korea
| | - Duck-Su Kim
- Department of Conservative Dentistry, School of Dentistry, Kyung Hee University, 02447, Seoul, South Korea
| | - Jiyeon Roh
- Department of Dental Hygiene, Yonsei University Wonju College of Medicine, Wonju, 26426, South Korea
| | - Salvatore Sauro
- Dental Biomaterials, Departamento de Odontología, Facultad de Ciencias de la Salud, University CEU-Cardenal Herrera, Valencia, Spain.,Tissue Engineering & Biophotonics, King's College London Dental Institute (KCLDI), London, UK
| | - Hae-Won Kim
- Department of Biomaterials Science, School of Dentistry, Dankook University, Cheonan 31116, South Korea.,Institute of Tissue Regeneration Engineering (ITREN), Dankook University, Cheonan, 31116, South Korea.,Department of Nanobiomedical Science & BK21 PLUS NBM Global Research Center for Regenerative Medicine Research Center, Dankook University, Cheonan, 31116, South Korea
| | - Jung-Hwan Lee
- Department of Biomaterials Science, School of Dentistry, Dankook University, Cheonan 31116, South Korea. .,Institute of Tissue Regeneration Engineering (ITREN), Dankook University, Cheonan, 31116, South Korea.
| | - Hae-Hyoung Lee
- Department of Biomaterials Science, School of Dentistry, Dankook University, Cheonan 31116, South Korea. .,Institute of Tissue Regeneration Engineering (ITREN), Dankook University, Cheonan, 31116, South Korea.
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9
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Lee JH, Jo JK, Kim DA, Patel KD, Kim HW, Lee HH. Nano-graphene oxide incorporated into PMMA resin to prevent microbial adhesion. Dent Mater 2018; 34:e63-e72. [DOI: 10.1016/j.dental.2018.01.019] [Citation(s) in RCA: 53] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2017] [Revised: 01/06/2018] [Accepted: 01/16/2018] [Indexed: 02/07/2023]
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10
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Siliakus MF, van der Oost J, Kengen SWM. Adaptations of archaeal and bacterial membranes to variations in temperature, pH and pressure. Extremophiles 2017; 21:651-670. [PMID: 28508135 PMCID: PMC5487899 DOI: 10.1007/s00792-017-0939-x] [Citation(s) in RCA: 191] [Impact Index Per Article: 27.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2016] [Accepted: 04/29/2017] [Indexed: 12/30/2022]
Abstract
The cytoplasmic membrane of a prokaryotic cell consists of a lipid bilayer or a monolayer that shields the cellular content from the environment. In addition, the membrane contains proteins that are responsible for transport of proteins and metabolites as well as for signalling and energy transduction. Maintenance of the functionality of the membrane during changing environmental conditions relies on the cell's potential to rapidly adjust the lipid composition of its membrane. Despite the fundamental chemical differences between bacterial ester lipids and archaeal ether lipids, both types are functional under a wide range of environmental conditions. We here provide an overview of archaeal and bacterial strategies of changing the lipid compositions of their membranes. Some molecular adjustments are unique for archaea or bacteria, whereas others are shared between the two domains. Strikingly, shared adjustments were predominantly observed near the growth boundaries of bacteria. Here, we demonstrate that the presence of membrane spanning ether-lipids and methyl branches shows a striking relationship with the growth boundaries of archaea and bacteria.
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Affiliation(s)
- Melvin F Siliakus
- Laboratory of Microbiology, Wageningen University and Research, Stippeneng 4, 6708 WE, Wageningen, The Netherlands.
| | - John van der Oost
- Laboratory of Microbiology, Wageningen University and Research, Stippeneng 4, 6708 WE, Wageningen, The Netherlands
| | - Servé W M Kengen
- Laboratory of Microbiology, Wageningen University and Research, Stippeneng 4, 6708 WE, Wageningen, The Netherlands
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11
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Buszewski B, Milanowski M, Ligor T, Pomastowski P. Investigation of bacterial viability from incubated saliva by application of flow cytometry and hyphenated separation techniques. Electrophoresis 2017; 38:2081-2088. [PMID: 28429817 DOI: 10.1002/elps.201700057] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2017] [Revised: 03/31/2017] [Accepted: 04/14/2017] [Indexed: 12/23/2022]
Abstract
The aim of the study was determination of bacterial viability in saliva samples and finding a correlation between microbiological and volatile profiles of saliva depending on incubation time. Bacteria colonizing healthy oral cavities were also identified. Twelve healthy adults donated unstimulated saliva samples. Flow cytometry, optical density measurements and colony-forming unit (CFU) counting method were employed for analyses of native and inoculated saliva after 0, 1, 2, 24, and 48 h of incubation. Volatile profiles were acquired using headspace-solid phase microextraction-gas chromatography/mass spectrometry (HS-SPME-GC/MS). Oral bacteria were the most viable within 2 h after collection of saliva. Extension of incubation time to 48 h caused considerable decrease in live bacteria counts and sharp increase in dead bacteria counts. The most prevalent strain was Sphingomonas paucimobilis (26.67%). The number of volatiles raised from 5 to 27 with incubation time and most of them were putrefaction products, such as methanethiol, indole and pyrrole. HS-SPME-GC/MS method is insufficient for volatile profiling of "fresh" saliva and should be directed rather to investigation of bacterial metabolites.
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Affiliation(s)
- Bogusław Buszewski
- Department of Environmental Chemistry and Bioanalytics, Faculty of Chemistry, Nicolaus Copernicus University, Toruń, Poland.,Interdisciplinary Centre of Modern Technologies, Nicolaus Copernicus University, Toruń, Poland
| | - Maciej Milanowski
- Department of Environmental Chemistry and Bioanalytics, Faculty of Chemistry, Nicolaus Copernicus University, Toruń, Poland.,Interdisciplinary Centre of Modern Technologies, Nicolaus Copernicus University, Toruń, Poland
| | - Tomasz Ligor
- Department of Environmental Chemistry and Bioanalytics, Faculty of Chemistry, Nicolaus Copernicus University, Toruń, Poland.,Interdisciplinary Centre of Modern Technologies, Nicolaus Copernicus University, Toruń, Poland
| | - Paweł Pomastowski
- Department of Environmental Chemistry and Bioanalytics, Faculty of Chemistry, Nicolaus Copernicus University, Toruń, Poland.,Interdisciplinary Centre of Modern Technologies, Nicolaus Copernicus University, Toruń, Poland
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12
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Gashti MP, Asselin J, Barbeau J, Boudreau D, Greener J. A microfluidic platform with pH imaging for chemical and hydrodynamic stimulation of intact oral biofilms. LAB ON A CHIP 2016; 16:1412-9. [PMID: 26956837 DOI: 10.1039/c5lc01540e] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
A microfluidic platform with a fluorescent nanoparticle-based sensor is demonstrated for real-time, ratiometric pH imaging of biofilms. Sensing is accomplished by a thin patterned layer of covalently bonded Ag@SiO2+FiTC nanoparticles on an embedded planar glass substrate. The system is designed to be sensitive, responsive and give sufficient spatial resolution to enable new micro-scale studies of the dynamic response of oral biofilms to well-controlled chemical and hydrodynamic stimulation. Performance under challenging operational conditions is demonstrated, which include long-duration exposure to sheer stresses, photoexcitation and pH sensor biofouling. After comprehensive validation, the device was used to monitor pH changes at the attachment surface of a biofilm of the oral bacteria, Streptococcus salivarius. By controlling flow and chemical concentration conditions in the microchannel, biochemical and mass transport contributions to the Stephan curve could be probed individually. This opens the way for the analysis of separate contributions to dental caries due to localized acidification directly at the biofilm tooth interface.
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Affiliation(s)
| | - J Asselin
- Département de chimie, Université Laval, Québec (QC), G1V 0A6 Canada. and Centre d'optique, photonique et laser (COPL), Québec (QC), G1V 0A6 Canada
| | - J Barbeau
- Faculté de médecine dentaire, Université de Montréal (QC), H3C 3J4 Canada
| | - D Boudreau
- Département de chimie, Université Laval, Québec (QC), G1V 0A6 Canada. and Centre d'optique, photonique et laser (COPL), Québec (QC), G1V 0A6 Canada
| | - J Greener
- Département de chimie, Université Laval, Québec (QC), G1V 0A6 Canada.
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Alexandre Y, Le Berre R, Barbier G, Le Blay G. Screening of Lactobacillus spp. for the prevention of Pseudomonas aeruginosa pulmonary infections. BMC Microbiol 2014; 14:107. [PMID: 24766663 PMCID: PMC4040502 DOI: 10.1186/1471-2180-14-107] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2014] [Accepted: 04/22/2014] [Indexed: 01/27/2023] Open
Abstract
BACKGROUND Pseudomonas aeruginosa is an opportunistic pathogen that significantly increases morbidity and mortality in nosocomial infections and cystic fibrosis patients. Its pathogenicity especially relies on the production of virulence factors or resistances to many antibiotics. Since multiplication of antibiotic resistance can lead to therapeutic impasses, it becomes necessary to develop new tools for fighting P. aeruginosa infections. The use of probiotics is one of the ways currently being explored. Probiotics are microorganisms that exert a positive effect on the host's health and some of them are known to possess antibacterial activities. Since most of their effects have been shown in the digestive tract, experimental data compatible with the respiratory environment are strongly needed. The main goal of this study was then to test the capacity of lactobacilli to inhibit major virulence factors (elastolytic activity and biofilm formation) associated with P. aeruginosa pathogenicity. RESULTS Sixty-seven lactobacilli were isolated from the oral cavities of healthy volunteers. These isolates together with 20 lactobacilli isolated from raw milks, were tested for their capacity to decrease biofilm formation and activity of the elastase produced by P. aeruginosa PAO1. Ten isolates, particularly efficient, were accurately identified using a polyphasic approach (API 50 CHL, mass-spectrometry and 16S/rpoA/pheS genes sequencing) and typed by pulsed-field gel electrophoresis (PFGE). The 8 remaining strains belonging to the L. fermentum (6), L. zeae (1) and L. paracasei (1) species were sensitive to all antibiotics tested with the exception of the intrinsic resistance to vancomycin. The strains were all able to grow in artificial saliva. CONCLUSION Eight strains belonging to L. fermentum, L. zeae and L. paracasei species harbouring anti-elastase and anti-biofilm properties are potential probiotics for fighting P. aeruginosa pulmonary infections. However, further studies are needed in order to test their innocuity and their capacity to behave such as an oropharyngeal barrier against Pseudomonas aeruginosa colonisation in vivo.
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MESH Headings
- Adult
- Aged
- Aged, 80 and over
- Animals
- Antibiosis
- Bacterial Proteins/genetics
- DNA, Bacterial/chemistry
- DNA, Bacterial/genetics
- DNA, Ribosomal/chemistry
- DNA, Ribosomal/genetics
- Electrophoresis, Gel, Pulsed-Field
- Female
- Healthy Volunteers
- Humans
- Lactobacillus/classification
- Lactobacillus/genetics
- Lactobacillus/isolation & purification
- Lactobacillus/physiology
- Male
- Mass Spectrometry
- Middle Aged
- Milk/microbiology
- Molecular Sequence Data
- Mouth/microbiology
- Pseudomonas aeruginosa/growth & development
- RNA, Ribosomal, 16S/genetics
- Sequence Analysis, DNA
- Young Adult
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Affiliation(s)
- Youenn Alexandre
- Université de Brest, EA 3882-Laboratoire Universitaire de Biodiversité et d’Écologie Microbienne (LUBEM), Faculté de Médecine, 22 avenue Camille Desmoulins, 29200 Brest, France
| | - Rozenn Le Berre
- Université de Brest, EA 3882-Laboratoire Universitaire de Biodiversité et d’Écologie Microbienne (LUBEM), Faculté de Médecine, 22 avenue Camille Desmoulins, 29200 Brest, France
- Département de Médecine Interne et Pneumologie, CHRU La Cavale-Blanche, 29200 Brest, France
| | - Georges Barbier
- Université de Brest, EA 3882-Laboratoire Universitaire de Biodiversité et d’Écologie Microbienne (LUBEM), Parvis Blaise Pascal, Technopôle Brest-Iroise, 29280 Plouzané, France
| | - Gwenaelle Le Blay
- Université de Brest, EA 3882-Laboratoire Universitaire de Biodiversité et d’Écologie Microbienne (LUBEM), Parvis Blaise Pascal, Technopôle Brest-Iroise, 29280 Plouzané, France
- Université de Brest, CNRS, IFREMER, UMR 6197-Laboratoire de Microbiologie des Environnement Extrêmes (LMEE), Institut Universitaire Européen de la Mer, Place Nicolas Copernic, Technopôle Brest-Iroise, 29280 Plouzané, France
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14
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Protective mechanisms of respiratory tract Streptococci against Streptococcus pyogenes biofilm formation and epithelial cell infection. Appl Environ Microbiol 2012; 79:1265-76. [PMID: 23241973 DOI: 10.1128/aem.03350-12] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Streptococcus pyogenes (group A streptococci [GAS]) encounter many streptococcal species of the physiological microbial biome when entering the upper respiratory tract of humans, leading to the question how GAS interact with these bacteria in order to establish themselves at this anatomic site and initiate infection. Here we show that S. oralis and S. salivarius in direct contact assays inhibit growth of GAS in a strain-specific manner and that S. salivarius, most likely via bacteriocin secretion, also exerts this effect in transwell experiments. Utilizing scanning electron microscopy documentation, we identified the tested strains as potent biofilm producers except for GAS M49. In mixed-species biofilms, S. salivarius dominated the GAS strains, while S. oralis acted as initial colonizer, building the bottom layer in mixed biofilms and thereby allowing even GAS M49 to form substantial biofilms on top. With the exception of S. oralis, artificial saliva reduced single-species biofilms and allowed GAS to dominate in mixed biofilms, although the overall two-layer structure was unchanged. When covered by S. oralis and S. salivarius biofilms, epithelial cells were protected from GAS adherence, internalization, and cytotoxic effects. Apparently, these species can have probiotic effects. The use of Affymetrix array technology to assess HEp-2 cell transcription levels revealed modest changes after exposure to S. oralis and S. salivarius biofilms which could explain some of the protective effects against GAS attack. In summary, our study revealed a protection effect of respiratory tract bacteria against an important airway pathogen and allowed a first in vitro insight into local environmental processes after GAS enter the respiratory tract.
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Murakami J, Terao Y, Morisaki I, Hamada S, Kawabata S. Group A streptococcus adheres to pharyngeal epithelial cells with salivary proline-rich proteins via GrpE chaperone protein. J Biol Chem 2012; 287:22266-75. [PMID: 22566698 DOI: 10.1074/jbc.m112.350082] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Group A Streptococcus pyogenes (GAS) is an important human pathogen that frequently causes pharyngitis. GAS organisms can adhere to and invade pharyngeal epithelial cells, which are overlaid by salivary components. However, the role of salivary components in GAS adhesion to pharyngeal cells has not been reported precisely. We collected human saliva and purified various salivary components, including proline-rich protein (PRP), statherin, and amylase, and performed invasion assays. The GAS-HEp-2 association ratio (invasion/adhesion ratio) and invasion ratio of GAS were increased significantly with whole human saliva and PRP, while the anti-PRP antibody inhibited the latter. GAS strain NY-5, which lacks M and F proteins on the cell surface, was promoted to cohere with HEp-2 cells by whole human saliva and PRP. The 28-kDa protein of GAS bound to PRP and was identified as GrpE, a chaperone protein, whereas the N-terminal of GrpE was found to bind to PRP. A GrpE-deficient mutant of GAS strain B514Sm, TR-45, exhibited a reduced ability to adhere to and invade HEp-2 cells. Microscopic observations showed the GrpE was mainly expressed on the surface of the cell division site of GAS. Furthermore, GrpE-deficient mutants of GAS and Streptococcus pneumoniae showed an elongated morphology as compared with the wild type. Taken together, this is the first study to show an interaction between salivary PRP and GAS GrpE, which plays an important role in GAS infection on the pharynx, whereas the expression of GrpE on the surface of GAS helps to maintain morphology.
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Affiliation(s)
- Jumpei Murakami
- Division of Special Care Dentistry, Osaka University Graduate School of Dentistry, Suita, Osaka, 565-0871, Japan
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Salivary enzymes and exhaled air affect Streptococcus salivarius growth and physiological state in complemented artificial saliva. Arch Microbiol 2011; 193:905-10. [DOI: 10.1007/s00203-011-0746-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2011] [Revised: 07/25/2011] [Accepted: 08/05/2011] [Indexed: 10/17/2022]
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