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Jo YH, Cho JH, Park DH, Yoon HI, Han SH, Yilmaz B. Antimicrobial activity, surface properties, and cytotoxicity of microencapsulated phytochemicals incorporated into three-dimensionally printable dental polymers. J Dent 2024; 141:104820. [PMID: 38128820 DOI: 10.1016/j.jdent.2023.104820] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2023] [Revised: 12/09/2023] [Accepted: 12/18/2023] [Indexed: 12/23/2023] Open
Abstract
OBJECTIVES This study aimed to investigate the antimicrobial properties of three dimensionally-printed dental polymers (3DPs) incorporated with microencapsulated phytochemicals (MPs) and to assess their surface characteristics and cytotoxicity. METHODS MPs derived from phytoncide oil and their specific chemical components were introduced into suspensions of three microbial species: Streptococcus gordonii, Streptococcus oralis, and Candida albicans. Optical density was measured to determine the microbial growth in the presence of MPs for testing their antimicrobial activity. MPs at 5% (w/w) were mixed with dental polymers and dispersants to 3DP discs. These microbial species were then seeded onto the discs and incubated for 24 h. The antibacterial and antifungal activities of MP-containing 3DPs were evaluated by counting the colony-forming units (n = 3). The biofilm formation on the 3DP was assessed by crystal violet staining assay (n = 3). Microbial viability was determined using a live-dead staining and CLSM observation (n = 3). Surface roughness and water contact angle were assessed (n = 10). Cytotoxicity of MP-containing 3DPs for human gingival fibroblast was evaluated by MTT assay. RESULTS MPs, particularly (-)-α-pinene, suppressed the growth of all tested microbial species. MP-containing 3DPs significantly reduced the colony count (P ≤ 0.001) and biofilm formation (P ≤ 0.009), of all tested microbial species. Both surface roughness (P < 0.001) and water contact angle (P < 0.001) increased. The cytotoxicity remained unchanged after incorporating MPs to the 3DPs (P = 0.310). CONCLUSIONS MPs effectively controlled the microbial growth on 3DPs as evidenced by the colony count, biofilm formation, and cell viability. Although MPs modified the surface characteristics, they did not influence the cytotoxicity of 3DPs. CLINICAL SIGNIFICANCE Integration of MPs into 3DPs could produce dental prostheses or appliances with antimicrobial properties. This approach not only provides a proactive solution to reduce the risk of oral biofilm-related infection but also ensures the safety and biocompatibility of the material, thereby improving dental care.
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Affiliation(s)
- Ye-Hyeon Jo
- Dental Research Institute, Seoul National University School of Dentistry, Seoul, Republic of Korea
| | - Jun-Ho Cho
- Department of Prosthodontics, School of Dentistry and Dental Research Institute, Seoul National University, Seoul, Republic of Korea
| | - Dong Hyun Park
- Department of Oral Microbiology and Immunology, and Dental Research Institute, School of Dentistry, Seoul National University, Seoul, Republic of Korea
| | - Hyung-In Yoon
- Department of Prosthodontics, School of Dentistry and Dental Research Institute, Seoul National University, Seoul, Republic of Korea; Department of Reconstructive Dentistry and Gerodontology, School of Dental Medicine, University of Bern, Bern, Switzerland.
| | - Seung Hyun Han
- Department of Oral Microbiology and Immunology, and Dental Research Institute, School of Dentistry, Seoul National University, Seoul, Republic of Korea
| | - Burak Yilmaz
- Department of Reconstructive Dentistry and Gerodontology, School of Dental Medicine, University of Bern, Bern, Switzerland; Department of Restorative, Preventive and Pediatric Dentistry, School of Dental Medicine, University of Bern, Bern, Switzerland; Division of Restorative and Prosthetic Dentistry, The Ohio State University, Columbus, OH, USA
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Le Bars P, Kouadio AA, Amouriq Y, Bodic F, Blery P, Bandiaky ON. Different Polymers for the Base of Removable Dentures? Part II: A Narrative Review of the Dynamics of Microbial Plaque Formation on Dentures. Polymers (Basel) 2023; 16:40. [PMID: 38201705 PMCID: PMC10780608 DOI: 10.3390/polym16010040] [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: 06/30/2023] [Revised: 12/04/2023] [Accepted: 12/08/2023] [Indexed: 01/12/2024] Open
Abstract
This review focuses on the current disparities and gaps in research on the characteristics of the oral ecosystem of denture wearers, making a unique contribution to the literature on this topic. We aimed to synthesize the literature on the state of current knowledge concerning the biological behavior of the different polymers used in prosthetics. Whichever polymer is used in the composition of the prosthetic base (poly methyl methacrylate acrylic (PMMA), polyamide (PA), or polyether ether ketone (PEEK)), the simple presence of a removable prosthesis in the oral cavity can disturb the balance of the oral microbiota. This phenomenon is aggravated by poor oral hygiene, resulting in an increased microbial load coupled with the reduced salivation that is associated with older patients. In 15-70% of patients, this imbalance leads to the appearance of inflammation under the prosthesis (denture stomatitis, DS). DS is dependent on the equilibrium-as well as on the reciprocal, fragile, and constantly dynamic conditions-between the host and the microbiome in the oral cavity. Several local and general parameters contribute to this balance. Locally, the formation of microbial plaque on dentures (DMP) depends on the phenomena of adhesion, aggregation, and accumulation of microorganisms. To limit DMP, apart from oral and lifestyle hygiene, the prosthesis must be polished and regularly immersed in a disinfectant bath. It can also be covered with an insulating coating. In the long term, relining and maintenance of the prosthesis must also be established to control microbial proliferation. On the other hand, several general conditions specific to the host (aging; heredity; allergies; diseases such as diabetes mellitus or cardiovascular, respiratory, or digestive diseases; and immunodeficiencies) can make the management of DS difficult. Thus, the second part of this review addresses the complexity of the management of DMP depending on the polymer used. The methodology followed in this review comprised the formulation of a search strategy, definition of the inclusion and exclusion criteria, and selection of studies for analysis. The PubMed database was searched independently for pertinent studies. A total of 213 titles were retrieved from the electronic databases, and after applying the exclusion criteria, we selected 84 articles on the possible microbial interactions between the prosthesis and the oral environment, with a particular emphasis on Candida albicans.
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Affiliation(s)
- Pierre Le Bars
- Department of Prosthetic Dentistry, Faculty of Dentistry, Nantes University, 1 Place Alexis Ricordeau, F-44042 Nantes, France; (A.A.K.); (Y.A.); (F.B.); (P.B.)
- Nantes University, Oniris, University of Angers, CHU Nantes (Clinical Investigation Unit Odontology), INSERM, Regenerative Medicine and Skeleton, RMeS, UMR 1229, F-44000 Nantes, France;
| | - Alain Ayepa Kouadio
- Department of Prosthetic Dentistry, Faculty of Dentistry, Nantes University, 1 Place Alexis Ricordeau, F-44042 Nantes, France; (A.A.K.); (Y.A.); (F.B.); (P.B.)
- Department of Prosthetic Dentistry, Faculty of Dentistry, CHU, Abidjan P.O. Box 612, Côte d’Ivoire
| | - Yves Amouriq
- Department of Prosthetic Dentistry, Faculty of Dentistry, Nantes University, 1 Place Alexis Ricordeau, F-44042 Nantes, France; (A.A.K.); (Y.A.); (F.B.); (P.B.)
- Nantes University, Oniris, University of Angers, CHU Nantes (Clinical Investigation Unit Odontology), INSERM, Regenerative Medicine and Skeleton, RMeS, UMR 1229, F-44000 Nantes, France;
| | - François Bodic
- Department of Prosthetic Dentistry, Faculty of Dentistry, Nantes University, 1 Place Alexis Ricordeau, F-44042 Nantes, France; (A.A.K.); (Y.A.); (F.B.); (P.B.)
- Nantes University, Oniris, University of Angers, CHU Nantes (Clinical Investigation Unit Odontology), INSERM, Regenerative Medicine and Skeleton, RMeS, UMR 1229, F-44000 Nantes, France;
| | - Pauline Blery
- Department of Prosthetic Dentistry, Faculty of Dentistry, Nantes University, 1 Place Alexis Ricordeau, F-44042 Nantes, France; (A.A.K.); (Y.A.); (F.B.); (P.B.)
- Nantes University, Oniris, University of Angers, CHU Nantes (Clinical Investigation Unit Odontology), INSERM, Regenerative Medicine and Skeleton, RMeS, UMR 1229, F-44000 Nantes, France;
| | - Octave Nadile Bandiaky
- Nantes University, Oniris, University of Angers, CHU Nantes (Clinical Investigation Unit Odontology), INSERM, Regenerative Medicine and Skeleton, RMeS, UMR 1229, F-44000 Nantes, France;
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Shen MT, Shahin B, Chen Z, Adami GR. Unexpected lower level of oral periodontal pathogens in patients with high numbers of systemic diseases. PeerJ 2023; 11:e15502. [PMID: 37465146 PMCID: PMC10351517 DOI: 10.7717/peerj.15502] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2023] [Accepted: 05/14/2023] [Indexed: 07/20/2023] Open
Abstract
Background Periodontal disease is associated with systemic conditions such as diabetes, arthritis, and cardiovascular disease, all diseases with large inflammatory components. Some, but not all, reports show periopathogens Porphyromonas gingivialis and Tannerella forsythia at higher levels orally in people with one of these chronic diseases and in people with more severe cases. These oral pathogens are thought to be positively associated with systemic inflammatory diseases through induction of oral inflammation that works to distort systemic inflammation or by directly inducing inflammation at distal sites in the body. This study aimed to determine if, among patients with severe periodontal disease, those with multi-morbidity (or many chronic diseases) showed higher levels of periodontal pathogens. Methods A total of 201 adult subjects, including 84 with severe periodontal disease were recruited between 1/2017 and 6/2019 at a city dental clinic. Electronic charts supplied self-reported diseases and conditions which informed a morbidity index based on the number of chronic diseases and conditions present. Salivary composition was determined by 16S rRNA gene sequencing. Results As expected, patients with severe periodontal disease showed higher levels of periodontal pathogens in their saliva. Also, those with severe periodontal disease showed higher levels of multiple chronic diseases (multimorbidity). An examination of the 84 patients with severe periodontal disease revealed some subjects despite being of advanced age were free or nearly free of systemic disease. Surprisingly, the salivary microbiota of the least healthy of these 84 subjects, defined here as those with maximal multimorbidity, showed significantly lower relative numbers of periodontal pathogens, including Porphyromonas gingivalis and Tannerella Forsythia, after controlling for active caries, tobacco usage, age, and gender. Analysis of a control group with none to moderate periodontal disease revealed no association of multimorbidity or numbers of medications used and specific oral bacteria, indicating the importance of severe periodontal disease as a variable of interest. Conclusion The hypothesis that periodontal disease patients with higher levels of multimorbidity would have higher levels of oral periodontal pathogens is false. Multimorbidity is associated with a reduced relative number of periodontal pathogens Porphyromonas gingivalis and Tannerella forsythia.
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Affiliation(s)
- Michael T Shen
- Oral Medicine and Diagnostic Sciences, College of Dentistry, University of Illinois Chicago, Chicago, IL, United States of America
| | - Betti Shahin
- Restorative Dentistry, University of Illinois Chicago, Chicago, IL, United States of America
| | - Zhengjia Chen
- Division of Epidemiology and Biostatistics, School of Public Health, University of Illinois at Chicago, Chicago, IL, United States of America
- Biostatistics Shared Resource Core, University of Illinois Cancer Center, University of Illinois Chicago, Chicago, IL, United States of America
| | - Guy R Adami
- Oral Medicine and Diagnostic Sciences, College of Dentistry, University of Illinois Chicago, Chicago, IL, United States of America
- University of Illinois Cancer Center, University of Illinois Chicago, Chicago, IL, United States of America
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Sodhi P, Jiang Y, Lin S, Downey J, Sorenson C, Shayegh M, Sullivan V, Kingsley K, Howard KM. Administration of Clinical COVID-19 Mouthwashing Protocol and Potential Modulation of Pediatric Oral Bacterial Prevalence of Selenomonas noxia: A Pilot Study. Pediatr Rep 2023; 15:414-425. [PMID: 37489412 PMCID: PMC10366775 DOI: 10.3390/pediatric15030038] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/03/2023] [Revised: 07/03/2023] [Accepted: 07/10/2023] [Indexed: 07/26/2023] Open
Abstract
Dental office protocols to combat the SARS-CoV-2 (COVID-19) pandemic include mouth washing for an extended 60 s, thereby reducing detectable oral virus. However, it is unclear whether this protocol has any effects on the newly identified periodontal pathogen and obesity-related bacterium often found among pediatric patients, Selenomonas noxia. To determine if the mouthwash protocol has any measurable effect on S. noxia amongst pediatric patients, clinical pediatric saliva samples were obtained from pediatric patients during routine visits for clinical care and treatment. Using an approved protocol, two saliva samples were collected on the same visit before and after chlorhexidine mouthwash (Sample A, Sample B). The third sample (Sample C) was taken at the recall appointment-usually between two and eight weeks later. A total of n = 97 pre-mouthwash samples, and an equal number of matching post-mouthwash samples (n = 97) were collected, with a small number of matching recall samples (n = 36) that were subsequently collected and identified. The demographic composition of the study sample was analyzed using Chi square statistics. Sample DNA from the matching pre-, post-, and recall collections (Sample A, Sample B, and Sample C) was isolated and screened using qPCR and validated primers, which revealed that 11.1% (n = 4/36) from Sample A tested positive for S. noxia with 0% (n = 0/36) of Sample B testing positive and 13.9% (n = 5/36) of the recall (Sample C) testing positive. In addition, comparative analysis of the qPCR cycle threshold data revealed relatively lower expression (quantity) of S. noxia DNA among the recall samples, as determined by two-tailed t-tests (p=0.004). These data and results provide new evidence for the oral prevalence of S. noxia among pediatric patients, while also demonstrating that the COVID-19 protocol of mouth washing prior to clinical treatment for periods extending up to 60 s may be sufficient to reduce the levels of detectable S. noxia-at least temporarily. More research will be needed to determine whether these effects may be limited to the short- or may exhibit more lasting effects in the long-term.
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Affiliation(s)
- Praneeti Sodhi
- Department of Advanced Education in Pediatric Dentistry, School of Dental Medicine, University of Nevada-Las Vegas, 1700 W. Charleston Boulevard, Las Vegas, NV 89106, USA
| | - Yuxin Jiang
- Department of Clinical Sciences, School of Dental Medicine, University of Nevada-Las Vegas, 1700 W. Charleston Boulevard, Las Vegas, NV 89106, USA
| | - Summer Lin
- Department of Clinical Sciences, School of Dental Medicine, University of Nevada-Las Vegas, 1700 W. Charleston Boulevard, Las Vegas, NV 89106, USA
| | - Jackson Downey
- Department of Clinical Sciences, School of Dental Medicine, University of Nevada-Las Vegas, 1700 W. Charleston Boulevard, Las Vegas, NV 89106, USA
| | - Chase Sorenson
- Department of Clinical Sciences, School of Dental Medicine, University of Nevada-Las Vegas, 1700 W. Charleston Boulevard, Las Vegas, NV 89106, USA
| | - Melika Shayegh
- Department of Advanced Education in Pediatric Dentistry, School of Dental Medicine, University of Nevada-Las Vegas, 1700 W. Charleston Boulevard, Las Vegas, NV 89106, USA
| | - Victoria Sullivan
- Department of Advanced Education in Pediatric Dentistry, School of Dental Medicine, University of Nevada-Las Vegas, 1700 W. Charleston Boulevard, Las Vegas, NV 89106, USA
| | - Karl Kingsley
- Department of Biomedical Sciences, School of Dental Medicine, University of Nevada-Las Vegas, 1001 Shadow Lane Boulevard, Las Vegas, NV 89106, USA
| | - Katherine M Howard
- Department of Biomedical Sciences, School of Dental Medicine, University of Nevada-Las Vegas, 1001 Shadow Lane Boulevard, Las Vegas, NV 89106, USA
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Esfanjani MT, Gilani N, Esfanjani AT, Nourizadeh AM, Faramarzi E, Hekmatfar S. Are oral health behaviors associated with metabolic syndrome in the Azar cohort population? BMC Oral Health 2023; 23:370. [PMID: 37291532 PMCID: PMC10251534 DOI: 10.1186/s12903-023-03003-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2023] [Accepted: 04/30/2023] [Indexed: 06/10/2023] Open
Abstract
OBJECTIVE Considering the rising prevalence of metabolic syndrome (MetS), this study aimed to investigate the relationship between MetS and its components with oral and dental health in the adult population of the Azar cohort. METHODS In this cross-sectional study oral health care behaviors, DMFT (decayed, missing, and filled teeth) index, and demographic data related to 15,006 patients (5112 in the MetS group and 9894 in the healthy group) of the Azar Cohort population aging from 35 to 70 were collected using appropriate questionnaires. The definition of MetS was based on the National Cholesterol Education Program Adult Treatment Panel III (ATP III) criteria. Then, the risk factors of MetS related to oral health behaviors were determined by proper statistical analysis. RESULTS The majority of MetS patients were female (66%) and uneducated (23%) (P < 0.001). In the MetS group, the DMFT index (22.15 ± 8.89) was significantly (p < 0.001) higher (20.81 ± 8.94) than the no MetS group. Not brushing at all was associated with increased odds of MetS (unadjusted OR = 1.12, adjusted OR = 1.18). Flossing less than once a day was associated with increased odds of abdominal obesity (unadjusted OR = 1.17, 95%CI = 1.03-1.32) and hyperglycemia (unadjusted OR = 1.88, 95%CI = 1.61-2.20). CONCLUSIONS This study showed that in MetS patients of the Azar cohort study, oral hygiene was worse compared to that in the no MetS group. Further studies are suggested to encourage oral hygiene among the general population which has more beneficiary effects than has been known before.
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Affiliation(s)
| | - Neda Gilani
- Statistics and Epidemiology department, Tabriz University of Medical Sciences, Tabriz, East Azerbaijan Iran
| | - Ali Tarighat Esfanjani
- Department of Clinical Nutrition, School of Nutrition and Food Sciences, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Amir Mohammad Nourizadeh
- Liver and Gastrointestinal Diseases Research center, Tabriz University of Medical Sciences, Tabriz, 51683343 Iran
| | - Elnaz Faramarzi
- Liver and Gastrointestinal Diseases Research center, Tabriz University of Medical Sciences, Tabriz, 51683343 Iran
| | - Somayeh Hekmatfar
- Faculty of Dentistry, Ardabil University of Medical Sciences, Ardabil, Iran
- Department of Pediatric Dentistry, School of Dentistry, Ardabil University of Medical Sciences, Ardabil, Iran
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Abstract
Frequently, periodontal health and it's associated oral biofilm has not been addressed in those patients who have systemic health issues, especially those who are not responding to medical treatment via their physician. Oral biofilm may be present in the periodontal sulcus in the absence of clinical disease of periodontal disease (bleeding on probing, gingival inflammation) and periodontal reaction is dependent on the patient's immune response to the associated bacterial and their byproducts. Increasing evidence has been emerging the past decade connecting oral biofilm with systemic conditions, either initiating them or complicating those medical conditions. The patient's health needs to be thought of as a whole-body system with connections that may originate in the oral cavity and have distant affects throughout the body. To maximize total health, a coordination in healthcare needs to be a symbiosis between the physician and dentist to eliminate the oral biofilm and aid in prevention of systemic disease or minimize those effects to improve the patient's overall health and quality of life. Various areas of systemic health have been associated with the bacteria and their byproducts in the oral biofilm. Those include cardiovascular disease, chronic kidney disease, diabetes, pulmonary disease, prostate cancer, colon cancer, pancreatic cancer, pre-term pregnancy, erectile dysfunction Alzheimer's disease and Rheumatoid arthritis. This article will discuss oral biofilm, its affects systemically and review the medical conditions associated with the oral systemic connection with an extensive review of the literature.
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Affiliation(s)
| | - Robert A. Horowitz
- Private periodontal practice Scarsdale, New York, USA
- Adjunct Clinical Assistant Professor, Department of Periodontology and Implant Dentistry, New York University College of Dentistry
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Levert-Levitt E, Shapira G, Sragovich S, Shomron N, Lam JCK, Li VOK, Heimesaat MM, Bereswill S, Yehuda AB, Sagi-Schwartz A, Solomon Z, Gozes I. Oral microbiota signatures in post-traumatic stress disorder (PTSD) veterans. Mol Psychiatry 2022; 27:4590-4598. [PMID: 35864319 DOI: 10.1038/s41380-022-01704-6] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/28/2022] [Revised: 07/06/2022] [Accepted: 07/06/2022] [Indexed: 12/14/2022]
Abstract
Post-traumatic stress disorder (PTSD) represents a global public health concern, affecting about 1 in 20 individuals. The symptoms of PTSD include intrusiveness (involuntary nightmares or flashbacks), avoidance of traumatic memories, negative alterations in cognition and mood (such as negative beliefs about oneself or social detachment), increased arousal and reactivity with irritable reckless behavior, concentration problems, and sleep disturbances. PTSD is also highly comorbid with anxiety, depression, and substance abuse. To advance the field from subjective, self-reported psychological measurements to objective molecular biomarkers while considering environmental influences, we examined a unique cohort of Israeli veterans who participated in the 1982 Lebanon war. Non-invasive oral 16S RNA sequencing was correlated with psychological phenotyping. Thus, a microbiota signature (i.e., decreased levels of the bacteria sp_HMT_914, 332 and 871 and Noxia) was correlated with PTSD severity, as exemplified by intrusiveness, arousal, and reactivity, as well as additional psychopathological symptoms, including anxiety, hostility, memory difficulties, and idiopathic pain. In contrast, education duration correlated with significantly increased levels of sp_HMT_871 and decreased levels of Bacteroidetes and Firmicutes, and presented an inverted correlation with adverse psychopathological measures. Air pollution was positively correlated with PTSD symptoms, psychopathological symptoms, and microbiota composition. Arousal and reactivity symptoms were correlated with reductions in transaldolase, an enzyme controlling a major cellular energy pathway, that potentially accelerates aging. In conclusion, the newly discovered bacterial signature, whether an outcome or a consequence of PTSD, could allow for objective soldier deployment and stratification according to decreases in sp_HMT_914, 332, 871, and Noxia levels, coupled with increases in Bacteroidetes levels. These findings also raise the possibility of microbiota pathway-related non-intrusive treatments for PTSD.
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Affiliation(s)
- Ella Levert-Levitt
- School of Psychological Sciences, Center for the Study of Child Development, University of Haifa, 6035 Rabin Building, Haifa, 3190501, Israel
| | - Guy Shapira
- Department of Cell and Developmental Biology, Sackler Faculty of Medicine, Sagol School of Neuroscience, Edmond J Safra Center for Bioinformatics, Tel Aviv University, Tel Aviv, 69978, Israel
| | - Shlomo Sragovich
- Elton Laboratory for Molecular Neuroendocrinology, Department of Human Molecular Genetics and Biochemistry, Sackler Faculty of Medicine, Adams Super Center for Brain Studies and Sagol School of Neuroscience, Tel Aviv University, 69978, Tel Aviv, Israel
| | - Noam Shomron
- Department of Cell and Developmental Biology, Sackler Faculty of Medicine, Sagol School of Neuroscience, Edmond J Safra Center for Bioinformatics, Tel Aviv University, Tel Aviv, 69978, Israel
| | - Jacqueline C K Lam
- Department of Electrical and Electronic Engineering, The University of Hong Kong, Hong Kong, China
| | - Victor O K Li
- Department of Electrical and Electronic Engineering, The University of Hong Kong, Hong Kong, China
| | - Markus M Heimesaat
- Institute for Microbiology, Infectious Diseases and Immunology, Charité - Universitätsmedizin Berlin, Hindenburgdamm 30, 12203, Berlin, Germany
| | - Stefan Bereswill
- Institute for Microbiology, Infectious Diseases and Immunology, Charité - Universitätsmedizin Berlin, Hindenburgdamm 30, 12203, Berlin, Germany
| | - Ariel Ben Yehuda
- Department of Health and Well-being, Medical Corps, Israel Defense Forces (IDF), Ramat Gan, Israel.,'Shalvata' Mental Health Center, Clalit Health Services, Hod Hasharon, 4534708, Israel
| | - Abraham Sagi-Schwartz
- School of Psychological Sciences, Center for the Study of Child Development, University of Haifa, 6035 Rabin Building, Haifa, 3190501, Israel
| | - Zahava Solomon
- Gershon H. Gordon Faculty of Social Sciences, Tel Aviv University, Tel Aviv, 69978, Israel
| | - Illana Gozes
- Elton Laboratory for Molecular Neuroendocrinology, Department of Human Molecular Genetics and Biochemistry, Sackler Faculty of Medicine, Adams Super Center for Brain Studies and Sagol School of Neuroscience, Tel Aviv University, 69978, Tel Aviv, Israel.
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Mazurek-Popczyk J, Nowicki A, Arkusz K, Pałka Ł, Zimoch-Korzycka A, Baldy-Chudzik K. Evaluation of biofilm formation on acrylic resins used to fabricate dental temporary restorations with the use of 3D printing technology. BMC Oral Health 2022; 22:442. [PMID: 36229871 PMCID: PMC9563793 DOI: 10.1186/s12903-022-02488-5] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2022] [Accepted: 10/06/2022] [Indexed: 11/17/2022] Open
Abstract
Background Temporary implant-retained restorations are required to support function and esthetics of the masticatory system until the final restoration is completed and delivered. Acrylic resins are commonly used in prosthetic dentistry and lately they have been used in three-dimensional (3D) printing technology. Since this technology it is fairly new, the number of studies on their susceptibility to microbial adhesion is low. Restorations placed even for a short period of time may become the reservoir for microorganisms that may affect the peri-implant tissues and trigger inflammation endangering further procedures. The aim of the study was to test the biofilm formation on acrylamide resins used to fabricate temporary restorations in 3D printing technology and to assess if the post-processing impacts microbial adhesion.
Methods Disk-shaped samples were manufactured using the 3D printing technique from three commercially available UV-curable resins consisting of acrylate and methacrylate oligomers with various time and inhibitors of polymerization (NextDent MFH bleach, NextDent 3D Plus, MazicD Temp). The tested samples were raw, polished and glazed. The ability to create biofilm by oral streptococci (S. mutans, S. sanguinis, S. oralis, S. mitis) was tested, as well as species with higher pathogenic potential: Staphylococcus aureus, Staphylococcus epidermidis and Candida albicans. The roughness of the materials was measured by an atomic force microscope. Biofilm formation was assessed after 72 h of incubation by crystal violet staining with absorbance measurement, quantification of viable microorganisms, and imaging with a scanning electron microscope (SEM). Results Each tested species formed the biofilm on the samples of all three resins. Post-production processing resulted in reduced roughness parameters and biofilm abundance. Polishing and glazing reduced roughness parameters significantly in the NextDent resin group, while glazing alone caused significant surface smoothing in Mazic Temp. A thin layer of microbial biofilm covered glazed resin surfaces with a small number of microorganisms for all tested strains except S. oralis and S. epidermidis, while raw and polished surfaces were covered with a dense biofilm, rich in microorganisms. Conclusions UV-curing acrylic resins used for fabricating temporary restorations in the 3D technology are the interim solution, but are susceptible to adhesion and biofilm formation by oral streptococci, staphylococci and Candida. Post-processing and particularly glazing process significantly reduce bacterial biofilm formation and the risk of failure of final restoration. Supplementary Information The online version contains supplementary material available at 10.1186/s12903-022-02488-5.
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Affiliation(s)
- Justyna Mazurek-Popczyk
- Department of Microbiology and Molecular Biology, Institute of Health Sciences, Collegium Medicum, University of Zielona Góra, Zielona Góra, Poland.
| | | | - Katarzyna Arkusz
- Department of Biomedical Engineering, Faculty of Mechanical Engineering, Institute of Materials and Biomedical Engineering, University of Zielona Góra, Zielona Góra, Poland
| | | | - Anna Zimoch-Korzycka
- The Faculty of Biotechnology and Food Science, Wrocław University of Environmental and Life Sciences, Wrocław, Poland
| | - Katarzyna Baldy-Chudzik
- Department of Microbiology and Molecular Biology, Institute of Health Sciences, Collegium Medicum, University of Zielona Góra, Zielona Góra, Poland
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Luong A, Tawfik AN, Islamoglu H, Gobriel HS, Ali N, Ansari P, Shah R, Hung T, Patel T, Henson B, Thankam F, Lewis J, Mintline M, Boehm T, Tumur Z, Seleem D. Periodontitis and diabetes mellitus co-morbidity: A molecular dialogue. J Oral Biosci 2021; 63:360-369. [PMID: 34728373 DOI: 10.1016/j.job.2021.10.006] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2021] [Revised: 10/21/2021] [Accepted: 10/26/2021] [Indexed: 12/21/2022]
Abstract
BACKGROUND Type 2 diabetes mellitus (T2DM) and periodontitis are two biologically linked diseases that often coexist in complex interaction. While periodontitis may lead to insulin receptor desensitization, diabetes may increase the expression of inflammatory cytokines, such as Tumor Necrosis Factor-α (TNF-α) and Interleukin 6 (IL-6), in the gingival crevicular fluid and activate osteoclasts via Receptor activator of nuclear factor kappa-Β ligand (RANK-L) production, leading to bone resorption. However, the association between the two diseases processes, where one may exacerbate the progression of the other, is unclear. In addition, both diseases have similar mechanistic themes, such as chronic inflammation and oxidative stress. This review aimed to investigate the pathophysiological and molecular mechanisms underlying T2DM and periodontitis. HIGHLIGHT Uncontrolled diabetes is often associated with severe periodontitis, measured by clinical attachment loss. Alteration in the oral microbiome composition, which may activate the host inflammatory response and lead to irreversible oxidative stress, is a common finding in both diseases. An understanding of the molecular crosstalk between the two disease processes is crucial for developing therapeutic targets that inhibit bone resorption and halt the progression of periodontitis in patients with diabetes. CONCLUSION The Oral microbiome composition in T2DM and periodontitis shifts toward dysbiosis, favoring bacterial pathogens, such as Fusobacteria and Porphyromonas species. Both conditions are marked by pro-inflammatory immune activity via the activation of Interleukin 17 (IL-17), Interleukin 1 (IL-1), TNF-α, and Nuclear Factor Kappa Beta (NF-κB). Common molecular crosstalk signaling appears to involve advanced glycation end products (AGEs) and oxidative stress. Thus, future drug targets are multifactorial, ranging from modulatory of host inflammatory response to preventing the accumulation of AGEs and oxidative free radicals.
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Affiliation(s)
- Anthony Luong
- College of Dental Medicine, Western University of Health Sciences, Pomona, CA 91766-1854, USA
| | - Andy Nassif Tawfik
- College of Dental Medicine, Western University of Health Sciences, Pomona, CA 91766-1854, USA
| | - Hicret Islamoglu
- College of Dental Medicine, Western University of Health Sciences, Pomona, CA 91766-1854, USA
| | - Hanaa Selim Gobriel
- College of Dental Medicine, Western University of Health Sciences, Pomona, CA 91766-1854, USA
| | - Nada Ali
- College of Dental Medicine, Western University of Health Sciences, Pomona, CA 91766-1854, USA
| | - Pouya Ansari
- College of Dental Medicine, Western University of Health Sciences, Pomona, CA 91766-1854, USA
| | - Ruchita Shah
- College of Dental Medicine, Western University of Health Sciences, Pomona, CA 91766-1854, USA
| | - Tiffany Hung
- College of Dental Medicine, Western University of Health Sciences, Pomona, CA 91766-1854, USA
| | - Tanusha Patel
- College of Dental Medicine, Western University of Health Sciences, Pomona, CA 91766-1854, USA
| | - Bradley Henson
- College of Dental Medicine, Western University of Health Sciences, Pomona, CA 91766-1854, USA
| | - Finosh Thankam
- College of Osteopathic Medicine, Western University of Health Sciences, Pomona, CA 91766-1854, USA
| | - Jill Lewis
- College of Dental Medicine, Western University of Health Sciences, Pomona, CA 91766-1854, USA
| | - Mark Mintline
- College of Dental Medicine, Western University of Health Sciences, Pomona, CA 91766-1854, USA
| | - Tobias Boehm
- College of Dental Medicine, Western University of Health Sciences, Pomona, CA 91766-1854, USA
| | - Zohra Tumur
- College of Dental Medicine, Western University of Health Sciences, Pomona, CA 91766-1854, USA
| | - Dalia Seleem
- College of Dental Medicine, Western University of Health Sciences, Pomona, CA 91766-1854, USA.
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10
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Risk Factors of Dysphagia Among Community-Dwelling Middle-Aged Women: Focused on Oropharyngeal Phase. Gastroenterol Nurs 2021; 43:164-171. [PMID: 32251218 DOI: 10.1097/sga.0000000000000419] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
Abstract
This study aimed to characterize a population of middle-aged South Korean women at risk of developing dysphagia and to identify relevant risk factors. This study describes a cross-sectional survey. Data on the general characteristics of the participants, risk factors for dysphagia, depression, and dental pain were collected and analyzed using descriptive statistics and logistic regression analysis. Among the 247 participants, 80 (32.4%) were assigned to the dysphagia "risk" group. Logistic regression indicated that perceived health status, low body mass index, dental pain, and depression were significant risk factors for developing dysphagia. A greater proportion of individuals were classified as having depression in the dysphagia "risk" group. Depression and dental pain were recognized as dominant risk factors for dysphagia. This work provides a basic reference that can be useful for the development of a general health education program for the prevention of dysphagia in community-dwelling middle-aged women.
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11
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Hoare A, Wang H, Meethil A, Abusleme L, Hong BY, Moutsopoulos NM, Marsh PD, Hajishengallis G, Diaz PI. A cross-species interaction with a symbiotic commensal enables cell-density-dependent growth and in vivo virulence of an oral pathogen. ISME JOURNAL 2020; 15:1490-1504. [PMID: 33372193 DOI: 10.1038/s41396-020-00865-y] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/25/2020] [Revised: 11/20/2020] [Accepted: 11/30/2020] [Indexed: 01/25/2023]
Abstract
Recent studies describe in detail the shifts in composition of human-associated polymicrobial communities from health to disease. However, the specific processes that drive the colonization and overgrowth of pathogens within these communities remain incompletely understood. We used in vitro culture systems and a disease-relevant mouse model to show that population size, which determines the availability of an endogenous diffusible small molecule, limits the growth, colonization, and in vivo virulence of the human oral pathogen Porphyromonas gingivalis. This bacterial pathogen overcomes the requirement for an endogenous cue by utilizing a cell-density dependent, growth-promoting, soluble molecule provided by the symbiotic early colonizer Veillonella parvula, but not produced by other commensals tested. Our work shows that exchange of cell-density-dependent diffusible cues between specific early and late colonizing species in a polymicrobial community drives microbial successions, pathogen colonization and disease development, representing a target process for manipulation of the microbiome towards the healthy state.
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Affiliation(s)
- Anilei Hoare
- Department of Oral Health and Diagnostic Sciences, School of Dental Medicine, UConn Health, Farmington, CT, 06030, USA.,Laboratory of Oral Microbiology, Faculty of Dentistry, Universidad de Chile, Santiago, Chile
| | - Hui Wang
- Department of Basic and Translational Sciences, Penn Dental Medicine, University of Pennsylvania, Philadelphia, PA, 19104, USA
| | - Archana Meethil
- Department of Oral Health and Diagnostic Sciences, School of Dental Medicine, UConn Health, Farmington, CT, 06030, USA
| | - Loreto Abusleme
- Laboratory of Oral Microbiology, Faculty of Dentistry, Universidad de Chile, Santiago, Chile.,Laboratory for Craniofacial Translational Research, Faculty of Dentistry, Universidad de Chile, Santiago, Chile
| | - Bo-Young Hong
- The Jackson Laboratory for Genomic Medicine, Farmington, CT, 06030, USA
| | - Niki M Moutsopoulos
- Oral Immunity and Inflammation Unit, National Institute of Dental and Craniofacial Research, National Institutes of Health, Bethesda, MD, 20892, USA
| | - Philip D Marsh
- Department of Oral Biology, School of Dentistry, University of Leeds, Leeds, UK
| | - George Hajishengallis
- Department of Basic and Translational Sciences, Penn Dental Medicine, University of Pennsylvania, Philadelphia, PA, 19104, USA
| | - Patricia I Diaz
- Department of Oral Health and Diagnostic Sciences, School of Dental Medicine, UConn Health, Farmington, CT, 06030, USA. .,Department of Oral Biology, School of Dental Medicine, University at Buffalo, State University of New York, Buffalo, NY, 14215, USA. .,UB Microbiome Center, University at Buffalo, State University of New York, Buffalo, NY, 14215, USA.
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12
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Llanos do Vale K, Ratto Tempestini Horliana AC, Romero Dos Santos S, Oppido Schalch T, Melo de Ana A, Agnelli Mesquita Ferrari R, Kalil Bussadori S, Porta Santos Fernandes K. Treatment of halitosis with photodynamic therapy in older adults with complete dentures: A randomized, controlled, clinical trial. Photodiagnosis Photodyn Ther 2020; 33:102128. [PMID: 33276115 DOI: 10.1016/j.pdpdt.2020.102128] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2020] [Revised: 11/04/2020] [Accepted: 11/23/2020] [Indexed: 10/22/2022]
Abstract
BACKGROUND Halitosis of oral origin is mainly caused by the release of H2S (hydrogen sulfide) by bacteria lodged on the tongue. Antimicrobial photodynamic therapy (aPDT) has been evaluated for the treatment of halitosis, but there are no previous reports of the use of this treatment modality in older people with dentures. The aim of the present study was to compare the effect of aPDT and tongue scraping (standard treatment) in older people with complete dentures diagnosed with halitosis (H2S gas concentration>112 ppb). METHODS The participants were divided into two groups: G1- treatment with a tongue scraper (n = 20); G2- treatment with aPDT (n = 20). Halimeter testing was performed before and after treatments using gas chromatography and was repeated after seven days. RESULTS After treatment, the group treated with aPDT had a lower mean concentration of H2S gas (18.5 ppb) than the tongue scraping group (185.3 ppb). After one week, the mean concentration of H2S increased to 218.2 ppb in the tongue scraping group and 39 ppb in the PDT group. CONCLUSIONS Both treatments were able to reduce the concentration of H2S but only treatment with aPDT was able to decrease halitosis to socially unnoticeable levels. Moreover, this normal breath condition remained for seven days only in the aPDT group.
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Affiliation(s)
- Katia Llanos do Vale
- Postgraduate Program in Biophotonics Applied to Health Sciences, Nove de Julho University, UNINOVE, R. Vergueiro, 235/249, 01504-001, São Paulo, Brazil; Dentistry School, Nove de Julho University, UNINOVE, R. Vergueiro, 235/249, 01504-001, São Paulo, Brazil.
| | - Anna Carolina Ratto Tempestini Horliana
- Postgraduate Program in Biophotonics Applied to Health Sciences, Nove de Julho University, UNINOVE, R. Vergueiro, 235/249, 01504-001, São Paulo, Brazil; Dentistry School, Nove de Julho University, UNINOVE, R. Vergueiro, 235/249, 01504-001, São Paulo, Brazil.
| | - Sergio Romero Dos Santos
- Postgraduate Program in Biophotonics Applied to Health Sciences, Nove de Julho University, UNINOVE, R. Vergueiro, 235/249, 01504-001, São Paulo, Brazil; Dentistry School, Nove de Julho University, UNINOVE, R. Vergueiro, 235/249, 01504-001, São Paulo, Brazil.
| | - Tania Oppido Schalch
- Postgraduate Program in Biophotonics Applied to Health Sciences, Nove de Julho University, UNINOVE, R. Vergueiro, 235/249, 01504-001, São Paulo, Brazil.
| | - Alessandro Melo de Ana
- Postgraduate Program in Biophotonics Applied to Health Sciences, Nove de Julho University, UNINOVE, R. Vergueiro, 235/249, 01504-001, São Paulo, Brazil.
| | - Raquel Agnelli Mesquita Ferrari
- Postgraduate Program in Biophotonics Applied to Health Sciences, Nove de Julho University, UNINOVE, R. Vergueiro, 235/249, 01504-001, São Paulo, Brazil; Postgraduate Program in Rehabilitation Sciences, Nove de Julho University, UNINOVE, R. Vergueiro, 235/249, 01504-001, São Paulo, Brazil.
| | - Sandra Kalil Bussadori
- Postgraduate Program in Biophotonics Applied to Health Sciences, Nove de Julho University, UNINOVE, R. Vergueiro, 235/249, 01504-001, São Paulo, Brazil; Dentistry School, Nove de Julho University, UNINOVE, R. Vergueiro, 235/249, 01504-001, São Paulo, Brazil; Postgraduate Program in Rehabilitation Sciences, Nove de Julho University, UNINOVE, R. Vergueiro, 235/249, 01504-001, São Paulo, Brazil.
| | - Kristianne Porta Santos Fernandes
- Postgraduate Program in Biophotonics Applied to Health Sciences, Nove de Julho University, UNINOVE, R. Vergueiro, 235/249, 01504-001, São Paulo, Brazil; Dentistry School, Nove de Julho University, UNINOVE, R. Vergueiro, 235/249, 01504-001, São Paulo, Brazil.
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13
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Černáková L, Rodrigues CF. Microbial interactions and immunity response in oral Candida species. Future Microbiol 2020; 15:1653-1677. [PMID: 33251818 DOI: 10.2217/fmb-2020-0113] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Oral candidiasis are among the most common noncommunicable diseases, related with serious local and systemic illnesses. Although these infections can occur in all kinds of patients, they are more recurrent in immunosuppressed ones such as patients with HIV, hepatitis, cancer or under long antimicrobial treatments. Candida albicans continues to be the most frequently identified Candida spp. in these disorders, but other non-C. albicans Candida are rising. Understanding the immune responses involved in oral Candida spp. infections is a key feature to a successful treatment and to the design of novel therapies. In this review, we performed a literature search in PubMed and WoS, in order to examine and analyze common oral Candida spp.-bacteria/Candida-Candida interactions and the host immunity response in oral candidiasis.
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Affiliation(s)
- Lucia Černáková
- Department of Microbiology & Virology, Faculty of Natural Sciences, Comenius University in Bratislava, Ilkovičova 6, 842 15 Bratislava, Slovakia
| | - Célia F Rodrigues
- Department of Chemical Engineering, LEPABE - Laboratory for Process Engineering, Environment, Biotechnology & Energy, Faculty of Engineering, University of Porto, Portugal
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14
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An YZ, Ko KA, Kim CS, Gruber R, Wang X, Lee JS. Do periodontal defects affect periodontal inflammation and destruction? Histological/microbiological changes and gene expression profiles of a pilot study in beagle dogs. J Periodontol 2020; 92:1007-1017. [PMID: 33128228 DOI: 10.1002/jper.20-0508] [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: 07/23/2020] [Revised: 09/06/2020] [Accepted: 09/24/2020] [Indexed: 11/12/2022]
Abstract
BACKGROUND The present study focused on the inflammatory disease progress after periodontal defect induction and aimed to specifically determine periodontal tissue responses following dental plaque accumulation by ligatures on a site with/without standardized periodontal defect induction. METHODS After 1 month from extraction of the adjacent teeth, semi-circumferential defects were surgically created in the unilateral second and fourth premolars (test group), whereas no defects were being induced at the contralateral sites (control group). One week later, silk was used to ligate the tooth cervix at both sites to encourage the accumulation of dental plaque. Four weeks later, the tissue samples were collected for histological/histomorphometric and microarray analysis. Microbiological analysis was performed before defect induction and at ligatures, and after 4 weeks of dental plaque accumulation. RESULTS Remarkable inflammation was clinically and histologically observed in both groups after plaque accumulation, and the intrabony type of periodontal defect exaggerated inflammatory cell infiltration into the connective tissue layer. Expression of genes related to inflammation such as IL-1 was highly up-regulated in test sites. However, these inflammatory infiltrations did not invade to a boundary of periodontal ligament and connective tissue attachment in both groups, and histomorphometric results corresponds to these observational results. Bacterial findings also showed no significant differences in detected microbiome compositions between control and test groups at three-time points. CONCLUSION Intrabony defect might exaggerate the plaque-induced inflammation in the aspect of inflammatory cell infiltration and the related gene expression, but both dental plaque and the pre-existing periodontal defect negligibly disrupt periodontal attachment and the underlying alveolar bone.
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Affiliation(s)
- Yin-Zhe An
- Key Laboratory of Oral Medicine, Guangzhou Institute of Oral Disease, Affiliated Stomatology Hospital of Guangzhou Medical University, Guangzhou, Guangdong, China.,Department of Periodontology, Affiliated Stomatology Hospital of Guangzhou Medical University, Guangzhou, Guangdong, China
| | - Kyung-A Ko
- Department of Periodontology, College of Dentistry, Research Institute for Periodontal Regeneration, Yonsei University, Seoul, Republic of Korea
| | - Chang-Sung Kim
- Department of Periodontology, College of Dentistry, Research Institute for Periodontal Regeneration, Yonsei University, Seoul, Republic of Korea
| | - Reinhard Gruber
- Department of Oral Biology, School of Dentistry, Medical University of Vienna, Vienna, Austria
| | - Xinhong Wang
- Key Laboratory of Oral Medicine, Guangzhou Institute of Oral Disease, Affiliated Stomatology Hospital of Guangzhou Medical University, Guangzhou, Guangdong, China.,Department of Periodontology, Affiliated Stomatology Hospital of Guangzhou Medical University, Guangzhou, Guangdong, China
| | - Jung-Seok Lee
- Department of Periodontology, College of Dentistry, Research Institute for Periodontal Regeneration, Yonsei University, Seoul, Republic of Korea
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15
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Karygianni L, Attin T, Thurnheer T. Combined DNase and Proteinase Treatment Interferes with Composition and Structural Integrity of Multispecies Oral Biofilms. J Clin Med 2020; 9:jcm9040983. [PMID: 32244784 PMCID: PMC7231231 DOI: 10.3390/jcm9040983] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2020] [Revised: 03/27/2020] [Accepted: 03/28/2020] [Indexed: 12/16/2022] Open
Abstract
Modification of oral biofilms adhering to dental hard tissues could lead to new treatment approaches in cariology and periodontology. In this study the impact of DNase I and/or proteinase K on the formation of a simulated supragingival biofilm was investigated in vitro. Six-species biofilms were grown anaerobically in the presence of DNase I and proteinase K. After 64 h biofilms were either harvested and quantified by culture analysis or proceeded to staining followed by confocal laser scanning microscopy. Microbial cells were stained using DNA-dyes or fluorescent in situ hybridization. Exopolysaccharides, eDNA and exoproteins were stained with Calcofluor, anti-DNA-antibody, and SyproTM Ruby, respectively. Overall, results showed that neither DNase I nor proteinase K had an impact on total colony-forming units (CFUs) compared to the control without enzymes. However, DNase I significantly suppressed the growth of Actinomyces oris, Fusobacterium nucleatum, Streptococcus mutans, Streptococcus oralis and Candida albicans. Proteinase K treatment induced significant increase in S. mutans and S. oralis CFUs (p < 0.001), whereas C. albicans and V. dispar showed lower CFUs compared to the control. Interestingly, confocal images visualized the biofilm degradation caused by DNase I and proteinase K. Thus, enzymatic treatment should be combined with conventional antimicrobial agents aiming at both bactericidal effectiveness and biofilm dispersal.
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16
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Sato N, Kakuta M, Uchino E, Hasegawa T, Kojima R, Kobayashi W, Sawada K, Tamura Y, Tokuda I, Imoto S, Nakaji S, Murashita K, Yanagita M, Okuno Y. The relationship between cigarette smoking and the tongue microbiome in an East Asian population. J Oral Microbiol 2020; 12:1742527. [PMID: 32341759 PMCID: PMC7170382 DOI: 10.1080/20002297.2020.1742527] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2019] [Revised: 11/28/2019] [Accepted: 12/17/2019] [Indexed: 01/27/2023] Open
Abstract
Background: The oral microbiome, which consists of various habitats, has been shown to be influenced by smoking. However, differences in the tongue microbiomes of current and former smokers, as well as their resultant functional consequences, have rarely been investigated in East Asian populations. Methods: We used 16S rRNA amplicon sequencing of tongue-coating samples obtained from East Asian subjects who were current, former, or never smokers to identify differences in their tongue microbiomes and related metagenomic functions. Two sets of participants from 2016 to 2017 (n = 657 and n = 187, respectively) were analyzed separately. Results: We found significant differences between the overall microbiome compositions of current versus never smokers (p = 0.0015), but not between former versus never smokers (p = 0.43) based on the weighted UniFrac distance. Twenty-nine of 43 investigated genera showed significantly different expression levels in current versus never smokers. Neisseria and Capnocytophaga were less abundant, and Streptococcus and Megasphaera were more abundant in current smokers. Moreover, the abundances of metagenomic pathways, including those related to nitrate reduction and the tricarboxylic acid cycle, were significantly different between current and never smokers. Conclusions: The tongue microbiomes and related metagenomic pathways of current smokers differ from those of never smokers among East Asians.
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Affiliation(s)
- Noriaki Sato
- Department of Biomedical Data Intelligence, Graduate School of Medicine, Kyoto University, Kyoto, Japan.,Department of Nephrology, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Masanori Kakuta
- Human Genome Center, The Institute of Medical Science, the University of Tokyo, Tokyo, Japan
| | - Eiichiro Uchino
- Department of Nephrology, Graduate School of Medicine, Kyoto University, Kyoto, Japan.,Department of Medical Intelligent Systems, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Takanori Hasegawa
- Health Intelligence Center, the Institute of Medical Science, The University of Tokyo, Tokyo, Japan
| | - Ryosuke Kojima
- Department of Biomedical Data Intelligence, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Wataru Kobayashi
- Department of Oral and Maxillofacial Surgery, Hirosaki University Graduate School of Medicine, Aomori, Japan
| | - Kaori Sawada
- Department of Social Medicine, Hirosaki University Graduate School of Medicine, Aomori, Japan
| | - Yoshihiro Tamura
- Department of Oral and Maxillofacial Surgery, Hirosaki University Graduate School of Medicine, Aomori, Japan
| | - Itoyo Tokuda
- Department of Oral Health Care, Hirosaki University Graduate School of Medicine, Aomori, Japan
| | - Seiya Imoto
- Health Intelligence Center, the Institute of Medical Science, The University of Tokyo, Tokyo, Japan
| | - Shigeyuki Nakaji
- Department of Social Medicine, Hirosaki University Graduate School of Medicine, Aomori, Japan
| | | | - Motoko Yanagita
- Department of Nephrology, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Yasushi Okuno
- Department of Biomedical Data Intelligence, Graduate School of Medicine, Kyoto University, Kyoto, Japan
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17
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Murugesan S, Al Ahmad SF, Singh P, Saadaoui M, Kumar M, Al Khodor S. Profiling the Salivary microbiome of the Qatari population. J Transl Med 2020; 18:127. [PMID: 32169076 PMCID: PMC7071716 DOI: 10.1186/s12967-020-02291-2] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2019] [Accepted: 03/04/2020] [Indexed: 12/14/2022] Open
Abstract
BACKGROUND The role of the human microbiome in human health and disease has been studied in various body sites. However, compared to the gut microbiome, where most of the research focus is, the salivary microbiome still bears a vast amount of information that needs to be revealed. This study aims to characterize the salivary microbiome composition in the Qatari population, and to explore specific microbial signatures that can be associated with various lifestyles and different oral conditions. MATERIALS AND METHODS We characterized the salivary microbiome of 997 Qatari adults using high-throughput sequencing of the V1-V3 region of the 16S rRNA gene. RESULTS In this study, we have characterized the salivary microbiome of 997 Qatari participants. Our data show that Bacteroidetes, Firmicutes, Actinobacteria and Proteobacteria are the common phyla isolated from the saliva samples, with Bacteroidetes being the most predominant phylum. Bacteroidetes was also more predominant in males versus females in the study cohort, although differences in the microbial diversity were not statistically significant. We also show that, a lower diversity of the salivary microbiome is observed in the elderly participants, with Prevotella and Treponema being the most significant genera. In participants with oral conditions such as mouth ulcers, bleeding or painful gum, our data show that Prevotella and Capnocytophaga are the most dominant genera as compared to the controls. Similar patterns were observed in participants with various smoking habits as compared to the non-smoking participants. Our data show that Streptococcus and Neisseria are more dominant among denture users, as compared to the non-denture users. Our data also show that, abnormal oral conditions are associated with a reduced microbial diversity and microbial richness. Moreover, in this study we show that frequent coffee drinkers have higher microbial diversity compared to the non-drinkers, indicating that coffee may cause changes to the salivary microbiome. Furthermore, tea drinkers show higher microbial richness as compared to the non-tea drinkers. CONCLUSION This is the first study to assess the salivary microbiome in an Arab population, and one of the largest population-based studies aiming to the characterize the salivary microbiome composition and its association with age, oral health, denture use, smoking and coffee-tea consumption.
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Affiliation(s)
| | | | - Parul Singh
- Research Department, Sidra Medicine, Doha, Qatar
| | | | - Manoj Kumar
- Research Department, Sidra Medicine, Doha, Qatar
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Mukai Y, Torii M, Urushibara Y, Kawai T, Takahashi Y, Maeda N, Ohkubo C, Ohshima T. Analysis of plaque microbiota and salivary proteins adhering to dental materials. J Oral Biosci 2020; 62:182-188. [PMID: 32151606 DOI: 10.1016/j.job.2020.02.003] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2020] [Revised: 02/10/2020] [Accepted: 01/23/2020] [Indexed: 10/24/2022]
Abstract
OBJECTIVES Plaque causes oral diseases and aspiration-pneumonia in the elderly. It is not known whether pellicle-like attached salivary proteins and microbiota on dental materials are identical to those on teeth. The purpose of this study was to determine the properties of salivary proteins and microbiota that attach to dental materials. METHODS Eight subjects wore removable oral splints with pieces of pure-titanium, cobalt-chromium alloy, silver-palladium-copper-gold-alloy, denture-base-resin, and hydroxyapatite for 24 h. The bacteria that adhered to each material were analyzed using 16S rRNA sequencing simultaneously. Each material sample was then immersed in pooled saliva, and the attached proteins were collected. Salivary proteins were analyzed using MALDI-TOF/MS, and high molecular weight proteins were identified using peptide mass fingerprinting. RESULTS Among the dental materials, the α- and β-diversity of adherent flora were similar. The bacterial species that adhered easily to materials were Streptococcus sp. oral taxon 058, Neisseria mucosa, Gemella haemolysans, and Rothia dentocariosa. Regardless of material, the peaks or spots of attached salivary proteins had similar patterns, containing functioning proteins such as anchoring receptors for early colonizers. CONCLUSIONS There were no significant differences in microbiota and protein adherence in hydroxyapatite compared to the dental materials. Therefore, similar microbiota was determined to have formed on the similar pellicle-like proteins. In our study, the characteristics of plaque adhesion on both hydroxyapatite and dental materials were clarified. Based on this study, the creation of new methods of inhibiting plaque adhesion to prevent aspiration-pneumonia and oral infections can be undertaken.
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Affiliation(s)
- Yoko Mukai
- Department of Oral Microbiology, Tsurumi University, School of Dental Medicine, 2-1-3, Tsurumi, Tsurumi-ku, Yokohama, 230-8501, Japan.
| | - Mana Torii
- Department of Removable Prosthodontics, Tsurumi University, School of Dental Medicine, 2-1-3, Tsurumi, Tsurumi-ku, Yokohama, Japan.
| | - Yu Urushibara
- Department of Removable Prosthodontics, Tsurumi University, School of Dental Medicine, 2-1-3, Tsurumi, Tsurumi-ku, Yokohama, Japan.
| | - Tomomi Kawai
- Department of Oral Microbiology, Tsurumi University, School of Dental Medicine, 2-1-3, Tsurumi, Tsurumi-ku, Yokohama, 230-8501, Japan.
| | - Yasuharu Takahashi
- Department of Oral Microbiology, Tsurumi University, School of Dental Medicine, 2-1-3, Tsurumi, Tsurumi-ku, Yokohama, 230-8501, Japan.
| | - Nobuko Maeda
- Department of Oral Microbiology, Tsurumi University, School of Dental Medicine, 2-1-3, Tsurumi, Tsurumi-ku, Yokohama, 230-8501, Japan.
| | - Chikahiro Ohkubo
- Department of Removable Prosthodontics, Tsurumi University, School of Dental Medicine, 2-1-3, Tsurumi, Tsurumi-ku, Yokohama, Japan.
| | - Tomoko Ohshima
- Department of Oral Microbiology, Tsurumi University, School of Dental Medicine, 2-1-3, Tsurumi, Tsurumi-ku, Yokohama, 230-8501, Japan.
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Vollmer A, Al-Ahmad A, Argyropoulou A, Thurnheer T, Hellwig E, Attin T, Vach K, Wittmer A, Ferguson K, Skaltsounis AL, Karygianni L. Antimicrobial Photoinactivation Using Visible Light Plus Water-Filtered Infrared-A (VIS + wIRA) and Hypericum Perforatum Modifies In Situ Oral Biofilms. Sci Rep 2019; 9:20325. [PMID: 31889168 PMCID: PMC6937260 DOI: 10.1038/s41598-019-56925-7] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2019] [Accepted: 12/19/2019] [Indexed: 12/24/2022] Open
Abstract
Due to increasing antibiotic resistance, the application of antimicrobial photodynamic therapy (aPDT) is gaining increasing popularity in dentistry. The aim of this study was to investigate the antimicrobial effects of aPDT using visible light (VIS) and water-filtered infrared-A (wIRA) in combination with a Hypericum perforatum extract on in situ oral biofilms. The chemical composition of H. perforatum extract was analyzed using ultra-high-performance liquid chromatography coupled with high resolution mass spectrometry (UPLC-HRMS). To obtain initial and mature oral biofilms in situ, intraoral devices with fixed bovine enamel slabs (BES) were carried by six healthy volunteers for two hours and three days, respectively. The ex situ exposure of biofilms to VIS + wIRA (200 mWcm-2) and H. perforatum (32 mg ml-1, non-rinsed or rinsed prior to aPDT after 2-min preincubation) lasted for five minutes. Biofilm treatment with 0.2% chlorhexidine gluconate solution (CHX) served as a positive control, while untreated biofilms served as a negative control. The colony-forming units (CFU) of the aPDT-treated biofilms were quantified, and the surviving microorganisms were identified using MALDI-TOF biochemical tests as well as 16 S rDNA-sequencing. We could show that the H. perforatum extract had significant photoactivation potential at a concentration of 32 mg ml-1. When aPDT was carried out in the presence of H. perforatum, all biofilms (100%) were completely eradicated (p = 0.0001). When H. perforatum was rinsed off prior to aPDT, more than 92% of the initial viable bacterial count and 13% of the mature oral biofilm were killed. Overall, the microbial composition in initial and mature biofilms was substantially altered after aPDT, inducing a shift in the synthesis of the microbial community. In conclusion, H. perforatum-mediated aPDT using VIS + wIRA interferes with oral biofilms, resulting in their elimination or the substantial alteration of microbial diversity and richness. The present results support the evaluation of H. perforatum-mediated aPDT for the adjunctive treatment of biofilm-associated oral diseases.
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Affiliation(s)
- Andreas Vollmer
- Department of Operative Dentistry and Periodontology, Center for Dental Medicine, Albert-Ludwigs-University, Freiburg, Germany
| | - Ali Al-Ahmad
- Department of Operative Dentistry and Periodontology, Center for Dental Medicine, Albert-Ludwigs-University, Freiburg, Germany
| | - Aikaterini Argyropoulou
- Department of Pharmacognosy and Chemistry of Natural Products, Faculty of Pharmacy, National and Kapodistrian University of Athens, Athens, Greece
| | - Thomas Thurnheer
- Clinic for Conservative and Preventive Dentistry, Center of Dental Medicine, University of Zurich, Zurich, Switzerland
| | - Elmar Hellwig
- Department of Operative Dentistry and Periodontology, Center for Dental Medicine, Albert-Ludwigs-University, Freiburg, Germany
| | - Thomas Attin
- Clinic for Conservative and Preventive Dentistry, Center of Dental Medicine, University of Zurich, Zurich, Switzerland
| | - Kirstin Vach
- Institute for Medical Biometry and Statistics, Center for Medical Biometry and Medical Informatics, Albert-Ludwigs-University, Freiburg, Germany
| | - Annette Wittmer
- Institute of Medical Microbiology and Hygiene, Albert-Ludwigs-University, Freiburg, Germany
| | - Kerry Ferguson
- Botanical Innovation, Unit 2, 390 Clergate Road, Orange, NSW, 2800, Australia
| | - Alexios Leandros Skaltsounis
- Department of Pharmacognosy and Chemistry of Natural Products, Faculty of Pharmacy, National and Kapodistrian University of Athens, Athens, Greece
| | - Lamprini Karygianni
- Clinic for Conservative and Preventive Dentistry, Center of Dental Medicine, University of Zurich, Zurich, Switzerland.
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Hayashi K, Nozaki K, Tan Z, Fujita K, Nemoto R, Yamashita K, Miura H, Itaka K, Ohara S. Enhanced Antibacterial Property of Facet-Engineered TiO 2 Nanosheet in Presence and Absence of Ultraviolet Irradiation. MATERIALS (BASEL, SWITZERLAND) 2019; 13:E78. [PMID: 31877887 PMCID: PMC6981437 DOI: 10.3390/ma13010078] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/28/2019] [Revised: 12/17/2019] [Accepted: 12/18/2019] [Indexed: 01/25/2023]
Abstract
Titania (TiO2) has attracted much attention recently for reducing bacterial diseases by the generation of reactive oxygen species (ROS) under UV irradiation. However, demand for higher photocatalytic activity due to higher recombination of electron and hole remains. The aims of this study were to make titania with higher antibacterial property and show the mechanisms of the bactericidal effect. In this study, we hydrothermally synthesized TiO2 nanosheets (NS) with highly-oriented structures. Samples were divided into five groups, depending on the fluorine/titanium ratio in the raw material, namely NS1.0, NS1.2, NS1.5, NS1.8, and NS2.0. Facet ratio and nanosheet size increased with an increase of fluorine/titanium ratio. The photocatalytic activity of TiO2 nanosheet was assessed by the generation of ROS. Hydroxyl radicals and superoxides were generated efficiently by ultraviolet light irradiation on NS1.5 and NS1.0, respectively. Antibacterial activity against Streptococcus mutans was assessed in the presence and absence of UV irradiation; NS1.0 showed superior antibacterial properties compared to commercially available TiO2 nanoparticles, under both conditions, due to the oxidation of intracellular components and cell membrane. These results together suggested TiO2 nanosheet induced bacterial cell death by oxidation, and TiO2 facet engineering resulted in enhancement of both photocatalytic and antibacterial activities of TiO2.
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Affiliation(s)
- Kenichiro Hayashi
- Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Bunkyo-ku, Tokyo 113-8549, Japan; (K.H.); (K.F.); (R.N.); (K.Y.); (H.M.)
| | - Kosuke Nozaki
- Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Bunkyo-ku, Tokyo 113-8549, Japan; (K.H.); (K.F.); (R.N.); (K.Y.); (H.M.)
| | - Zhenquan Tan
- State Key Laboratory of Fine Chemicals, School of Petroleum and Chemical Engineering, Dalian University of Technology, Panjin 124221, China
| | - Kazuhisa Fujita
- Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Bunkyo-ku, Tokyo 113-8549, Japan; (K.H.); (K.F.); (R.N.); (K.Y.); (H.M.)
| | - Reina Nemoto
- Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Bunkyo-ku, Tokyo 113-8549, Japan; (K.H.); (K.F.); (R.N.); (K.Y.); (H.M.)
| | - Kimihiro Yamashita
- Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Bunkyo-ku, Tokyo 113-8549, Japan; (K.H.); (K.F.); (R.N.); (K.Y.); (H.M.)
| | - Hiroyuki Miura
- Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Bunkyo-ku, Tokyo 113-8549, Japan; (K.H.); (K.F.); (R.N.); (K.Y.); (H.M.)
| | - Keiji Itaka
- Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University, Chiyoda-ku, Tokyo 101-0062, Japan
| | - Satoshi Ohara
- Joining and Welding Research Institute, Osaka University, 11-1 Mihogaoka, Ibaraki, Osaka 567-0047, Japan;
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Interkingdom interactions on the denture surface: Implications for oral hygiene. Biofilm 2019; 1:100002. [PMID: 32201858 PMCID: PMC7067236 DOI: 10.1016/j.bioflm.2019.100002] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2019] [Revised: 06/04/2019] [Accepted: 06/04/2019] [Indexed: 11/23/2022] Open
Abstract
Background Evidence to support the role of Candida species in oral disease is limited. Often considered a commensal, this opportunistic yeast has been shown to play a role in denture related disease, though whether it is an active participant or innocent bystander remains to be determined. This study sought to understand the role of Candida species alongside the bacterial microbiome in a denture patient cohort, exploring how the microbiology of the denture was affected by oral hygiene practices. Materials and methods In vitro denture cleansing studies were performed on a complex 9-species interkingdom denture biofilm model, with quantitative assessment of retained bacterial and fungal viable bioburdens. Patient hygiene measures were also collected from 131 patients, including OHIP, frequency of denture cleansing, oral hygiene measure and patient demographics. The bacterial microbiome was analysed from each patient, alongside quantitative PCR assessment of ITS (fungal) and 16S (bacterial) bioburden from denture, mucosa and intact dentition. Results It was shown that following in vitro denture cleansing C. albicans were unresponsive to treatment, whereas bacterial biofilms could repopulate 100-fold, but were susceptible to subsequent treatment. Within the patient cohort, oral hygiene did not impact candidal or bacterial composition, nor diversity. The levels of Candida did not significantly influence the bacterial microbiome, though an observed gradient was suggestive of a microbial composition change in response to Candida load, indicating interkingdom interaction rather than an oral hygiene effect. Indeed, correlation analysis was able to show significant correlations between Candida species and key genera (Lactobacillus, Scardovia, Fusobacterium). Conclusions Overall, this study has shown that the denture microbiome/mycobiome is relatively resilient to oral hygiene challenges, but that Candida species have potential interactions with key oral genera. These interactions may have a bearing on shaping community structure and a shift from health to disease when the opportunity arises.
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Smith RP, Doiron A, Muzquiz R, Fortoul MC, Haas M, Abraham T, Quinn RJ, Barraza I, Chowdhury K, Nemzer LR. The public and private benefit of an impure public good determines the sensitivity of bacteria to population collapse in a snowdrift game. Environ Microbiol 2019; 21:4330-4342. [DOI: 10.1111/1462-2920.14796] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2019] [Revised: 08/28/2019] [Accepted: 08/29/2019] [Indexed: 01/05/2023]
Affiliation(s)
- Robert P. Smith
- Department of Biological Sciences Halmos College of Natural Sciences and Oceanography, Nova Southeastern University Fort Lauderdale FL USA
| | - Aimee Doiron
- Department of Biological Sciences Halmos College of Natural Sciences and Oceanography, Nova Southeastern University Fort Lauderdale FL USA
| | - Rodrigo Muzquiz
- Department of Biological Sciences Halmos College of Natural Sciences and Oceanography, Nova Southeastern University Fort Lauderdale FL USA
| | - Marla C. Fortoul
- Department of Biological Sciences Halmos College of Natural Sciences and Oceanography, Nova Southeastern University Fort Lauderdale FL USA
| | - Meghan Haas
- Department of Biological Sciences Halmos College of Natural Sciences and Oceanography, Nova Southeastern University Fort Lauderdale FL USA
| | - Tom Abraham
- Department of Biological Sciences Halmos College of Natural Sciences and Oceanography, Nova Southeastern University Fort Lauderdale FL USA
| | - Rebecca J. Quinn
- Department of Biological Sciences Halmos College of Natural Sciences and Oceanography, Nova Southeastern University Fort Lauderdale FL USA
| | - Ivana Barraza
- Department of Biological Sciences Halmos College of Natural Sciences and Oceanography, Nova Southeastern University Fort Lauderdale FL USA
| | - Khadija Chowdhury
- Department of Biological Sciences Halmos College of Natural Sciences and Oceanography, Nova Southeastern University Fort Lauderdale FL USA
| | - Louis R. Nemzer
- Department of Chemistry and Physics Halmos College of Natural Sciences and Oceanography, Nova Southeastern University Fort Lauderdale FL USA
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Munhoz Pereira T, Alvim-Pereira F, Kaiser Alvim-Pereira CC, Ignácio SA, Machado de Souza C, Trevilatto PC. A complete physical mapping of the vitamin D receptor gene for dental implant loss: A pilot study. Clin Oral Implants Res 2019; 30:1165-1178. [PMID: 31461186 DOI: 10.1111/clr.13529] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2018] [Revised: 07/08/2019] [Accepted: 08/18/2019] [Indexed: 11/29/2022]
Abstract
OBJECTIVES The aim of this pilot case-control study was to investigate the association of clinical variables and genetic polymorphisms in the vitamin D receptor gene (VDR) with dental implant loss. MATERIAL AND METHODS This study was carried out with 244 individuals with mean age 51.90 ± 11.28 (81 cases and 163 controls matched by age, sex, and smoking habit). Also, the clusterization phenomenon was investigated stratifying the sample into two groups: (a) 34 patients with multiple losses (presenting two or more lost implants) and (b) 210 without multiple losses (up to one implant loss). Sociodemographic, clinical, and periodontal parameters were analyzed. The tagSNPs in the VDR gene were analyzed by real-time PCR. Univariate and multivariate analyses were performed (p < .05). RESULTS Edentulism, number of implants installed, and Gingival, Plaque, and Calculus Indexes were associated with implant loss in the univariate analysis. After the multivariate analysis, the allele G of rs3782905 in the recessive model, together with number of installed implants and Gingival Index, was associated with implant failure. CONCLUSION It is suggested that the allele G of rs3782905 in the recessive model may be a new genetic risk marker for dental implant loss in patients who lost two or more dental implants. In addition, number of implants installed and Gingival Index were also associated. Replication is mandatory to confirm these findings, due to the modest sample size of this work.
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Affiliation(s)
- Thaís Munhoz Pereira
- School of Life Sciences, Pontifícia Universidade Católica do Paraná (PUCPR), Curitiba, Brazil
| | - Fabiano Alvim-Pereira
- Department of Dentistry, Center of Health Sciences, Universidade Federal de Sergipe (UFS), Aracaju, Brazil
| | | | | | - Cleber Machado de Souza
- School of Life Sciences, Pontifícia Universidade Católica do Paraná (PUCPR), Curitiba, Brazil
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Inactivation of oral biofilms using visible light and water-filtered infrared A radiation and indocyanine green. Future Med Chem 2019; 11:1721-1739. [PMID: 31368351 DOI: 10.4155/fmc-2018-0522] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
Aim: To investigate the antimicrobial photodynamic therapy (aPDT) of visible light and water-filtered infrared A radiation in combination with indocyanine green (ICG) on planktonic oral microorganisms as well as on oral biofilm. Methods: The irradiation was conducted for 5 min in combination with ICG. Treatment with chlorhexidine served as a positive control. The number of colony forming units and bacterial vitality were quantified. Results: All tested bacterial strains and salivary bacteria were killed at a level of 3log10. The colony forming units of the initial mature oral biofilms were strongly reduced. The high bactericidal effect of aPDT was confirmed by live/dead staining. Conclusion: The aPDT using visible light and water-filtered infrared A radiation and ICG has the potential to treat periodontitis and peri-implantitis.
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25
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do Vale KL, Horliana ACRT, Romero SDS, Deana ADM, Gonçalves MLL, Ferrari RAM, Bussadori SK, Fernandes KPS. Evaluation of the treatment of halitosis with photodynamic therapy in older patients with complete denture: Protocol for a randomized, controlled trial. Medicine (Baltimore) 2019; 98:e16275. [PMID: 31277154 PMCID: PMC6635224 DOI: 10.1097/md.0000000000016275] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/07/2019] [Accepted: 06/10/2019] [Indexed: 11/18/2022] Open
Abstract
BACKGROUND Halitosis is the term used to define an unpleasant odor emanating from the mouth. However, no studies have evaluated the causes and treatment of halitosis in the population of older adults with denture. METHODS A randomized, controlled trial is proposed. The patients will be divided into 2 groups: G1: older adults who wear complete dentures and will be treated with tongue scraper (n = 20); G2 older adults who wear complete dentures and will be treated with PDT (n = 20). If the halitosis persists, the participants will be submitted to hygiene procedures for the mucosa and dentures. The evaluation of halitosis will be made before and after treatments, with OralChroma. If the halitosis is solved, the participants will return after 1 week for an additional evaluation. Oral Health Impact Profile (OHIP-14) will be administered by a calibrated examiner on the day the patient history is taken (baseline) and 1 week after treatment for halitosis. DISCUSSION This protocol will determine the effectiveness of photodynamic therapy regarding the reduction of halitosis in older adults with complete denture. TRIAL REGISTRATION This protocol was registered in ClinicalTrial.gov, under number NCT03960983. It was first posted and last updated in May 23, 2019. https://clinicaltrials.gov/ct2/show/NCT03960983.
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Affiliation(s)
- Katia Llanos do Vale
- Postgraduate program in Biophotonics Applied to Health Sciences, Universidade Nove de Julho
| | | | | | | | | | | | - Sandra Kalil Bussadori
- Postgraduate program in Biophotonics Applied to Health Sciences, Universidade Nove de Julho
- Postgraduate Program in Rehabilitation Sciences, Universidade Nove de Julho, UNINOVE, São Paulo, Brazil
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Mohammed WK, Krasnogor N, Jakubovics NS. Streptococcus gordonii Challisin protease is required for sensing cell--cell contact with Actinomyces oris. FEMS Microbiol Ecol 2019; 94:4935157. [PMID: 29547886 DOI: 10.1093/femsec/fiy043] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2017] [Accepted: 03/13/2018] [Indexed: 11/12/2022] Open
Abstract
The ability of microorganisms to regulate gene expression is thought to be critical for survival and growth during the development of polymicrobial biofilms such as dental plaque. The commensal dental plaque colonizer, Streptococcus gordonii, responds to cell--cell contact (coaggregation) with Actinomyces oris by regulating >20 genes, including those involved in arginine biosynthesis. We hypothesized that an S. gordonii extracellular protease is critical for sensing by providing amino acids that modulate gene expression. S. gordonii coaggregated strongly with A. oris in buffer, saliva or chemically defined medium (CDM). In wild-type S. gordonii, expression of arginine biosynthesis genes argC and argG increased within two hours' growth in CDM in monocultures, but not following coaggregation with A. oris. By contrast, coaggregation of A. oris with an S. gordonii mutant lacking sgc, encoding the extracellular protease Challisin, resulted in increases in argC and argG gene expression that were similar to monocultures. Genetic complementation of sgc restored the ability of S. gordonii to sense coaggregation with A. oris. Coaggregation enabled growth of S. gordonii in low/no arginine and disruption of sgc did not affect this ability. We propose that extracellular bacterial proteases may be key mediators of cell--cell contact sensing by diverse microbial species.
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Affiliation(s)
- Waleed K Mohammed
- School of Dental Sciences, Centre for Oral Health Research, Newcastle University, Newcastle upon Tyne, NE2 4BW, UK.,Department of Basic Science, College of Dentistry, University of Anbar, Ramadi, Anbar, Iraq
| | - Natalio Krasnogor
- Interdisciplinary Computing and Complex Biosystems (ICOS) research group, School of Computing, Urban Sciences Building, Newcastle University, 1 Science Square, Newcastle upon Tyne, NE4 5TG, UK
| | - Nicholas S Jakubovics
- School of Dental Sciences, Centre for Oral Health Research, Newcastle University, Newcastle upon Tyne, NE2 4BW, UK
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Malic S, Rai S, Redfern J, Pritchett J, Liauw CM, Verran J, Tosheva L. Zeolite-embedded silver extends antimicrobial activity of dental acrylics. Colloids Surf B Biointerfaces 2019; 173:52-57. [DOI: 10.1016/j.colsurfb.2018.09.043] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2018] [Revised: 09/17/2018] [Accepted: 09/19/2018] [Indexed: 12/30/2022]
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28
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de Castro DT, do Nascimento C, Alves OL, de Souza Santos E, Agnelli JAM, Dos Reis AC. Analysis of the oral microbiome on the surface of modified dental polymers. Arch Oral Biol 2018; 93:107-114. [PMID: 29890443 DOI: 10.1016/j.archoralbio.2018.06.005] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2018] [Revised: 04/23/2018] [Accepted: 06/03/2018] [Indexed: 12/12/2022]
Abstract
OBJECTIVES This study characterized the microbial diversity of formed biofilm on the surface of acrylic resins modified with nanostructured silver vanadate decorated with silver nanoparticles (AgVO3) after incubation in human saliva. DESIGN Resin specimens prepared with AgVO3 at concentrations 0%, 1%, 2.5%, and 5% by either vacuum mixing or polymer solubilization were characterized by scanning electron microscopy (SEM) and X-ray diffraction (XRD). After 24 h and 7 days of saliva incubation, biofilm samples were collected from the surface of the specimens. The 16S rDNA genes were amplified, sequenced with the 454-Roche next-generation sequencing platform and analyzed to identify the Operational Taxonomic Units at the genus or higher level. RESULTS Significant differences in the dispersion pattern of the nanoparticles were observed among the two different methods of AgVO3 incorporation. In the microbiological analysis, a total of 103 genera and 7 more inclusive taxa, representing the phyla Bacteroidetes, Firmicutes and Proteobacteria were identified colonizing resin surfaces. The incorporation method of the AgVO3 had little to no significant effect on the microbiota of samples. Significant time and concentration-dependent responses to AgVO3 caused changes in the taxonomic profile at the phylum and genus level. CONCLUSIONS The results show differences in relation to the microbial diversity of modified resins during the initial phase of biofilm maturation. The incorporation of AgVO3 seems to significantly affect the colonizing microbiota.
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Affiliation(s)
- Denise Tornavoi de Castro
- School of Dentistry of Uberaba, Department of Biomaterials, University of Uberaba, Av. Nenê Sabino, 1801, Bairro Universitário, Uberaba, Minas Gerais, 38055-500, Brazil
| | - Cássio do Nascimento
- School of Dentistry of Ribeirão Preto, Department of Dental Materials and Prosthodontics, University of São Paulo, Av. Café s/no, Monte Alegre, Ribeirão Preto, São Paulo, 14040-904, Brazil
| | - Oswaldo Luiz Alves
- State University of Campinas (UNICAMP), Laboratory of Solid State Chemistry, Cidade Universitária Zeferino Vaz - Barão Geraldo, Campinas, São Paulo, 13083-859, Brazil
| | - Emerson de Souza Santos
- School of Pharmaceutical Sciences of Ribeirão Preto, Department of Clinical Toxicological and Bromatologic Analysis, University of São Paulo, Av. Café s/no, Monte Alegre, Ribeirão Preto, São Paulo, 14040-903, Brazil
| | - José Augusto Marcondes Agnelli
- Federal University of São Carlos (UFSCAR), Department of Materials Engineering, CP 676, São Carlos, São Paulo, 13565-905, Brazil
| | - Andréa Cândido Dos Reis
- School of Dentistry of Ribeirão Preto, Department of Dental Materials and Prosthodontics, University of São Paulo, Av. Café s/no, Monte Alegre, Ribeirão Preto, São Paulo, 14040-904, Brazil.
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Kuroiwa A, Nomura Y, Ochiai T, Sudo T, Nomoto R, Hayakawa T, Kanzaki H, Nakamura Y, Hanada N. Antibacterial, Hydrophilic Effect and Mechanical Properties of Orthodontic Resin Coated with UV-Responsive Photocatalyst. MATERIALS 2018; 11:ma11060889. [PMID: 29799473 PMCID: PMC6025295 DOI: 10.3390/ma11060889] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/18/2018] [Revised: 05/19/2018] [Accepted: 05/21/2018] [Indexed: 11/16/2022]
Abstract
Photocatalysts have multiple applications in air purifiers, paints, and self-cleaning coatings for medical devices such as catheters, as well as in the elimination of xenobiotics. In this study, a coating of a UV-responsive photocatalyst, titanium dioxide (TiO₂), was applied to an orthodontic resin. The antibacterial activity on oral bacteria as well as hydrophilic properties and mechanical properties of the TiO₂-coated resin were investigated. ultraviolet A (UVA) (352 nm) light was used as the light source. Antibacterial activity was examined with or without irradiation. Measurements of early colonizers and cariogenic bacterial count, i.e., colony forming units (CFU), were performed after irradiation for different time durations. Hydrophilic properties were evaluated by water contact angle measurements. While, for the assessment of mechanical properties, flexural strength was measured by the three-point bending test. In the coat(+)light(+) samples the CFU were markedly decreased compared to the control samples. Water contact angle of the coat(+)light(+) samples was decreased after irradiation. The flexural strength of the specimen irradiated for long time showed a higher value than the required standard value, indicating that the effect of irradiation was weak. We suggest that coating with the ultraviolet responsive photocatalyst TiO₂ is useful for the development of orthodontic resin with antimicrobial properties.
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Affiliation(s)
- Akira Kuroiwa
- Department of Orthodontics, Tsurumi University School of Dental Medicine, Yokohama 230-8501, Japan.
| | - Yoshiaki Nomura
- Department of Translational Research, Tsurumi University School of Dental Medicine, Yokohama 230-8501, Japan.
| | - Tsuyoshi Ochiai
- Photocatalyst Group, Research and Development Department, Local Independent Administrative Agency Kanagawa Institute of industrial Science and TEChnology (KISTEC), 407 East Wing, Innovation Center Building, KSP, 3-2-1 Sakado, Takatsu-ku, Kawasaki, Kanagawa 213-0012, Japan.
- Materials Analysis Group, Kawasaki Technical Support Department, KISTEC, Ground Floor East Wing, Innovation Center Building, KSP, 3-2-1 Sakado, Takatsu-ku, Kawasaki, Kanagawa 213-0012, Japan.
- Photocatalysis International Research Center, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba 278-8510, Japan.
| | - Tomomi Sudo
- Department of Orthodontics, Tsurumi University School of Dental Medicine, Yokohama 230-8501, Japan.
| | - Rie Nomoto
- Department of Dental Engineering, Tsurumi University School of Dental Medicine, Yokohama 230-8501, Japan.
| | - Tohru Hayakawa
- Department of Dental Engineering, Tsurumi University School of Dental Medicine, Yokohama 230-8501, Japan.
| | - Hiroyuki Kanzaki
- Department of Orthodontics, Tsurumi University School of Dental Medicine, Yokohama 230-8501, Japan.
| | - Yoshiki Nakamura
- Department of Orthodontics, Tsurumi University School of Dental Medicine, Yokohama 230-8501, Japan.
| | - Nobuhiro Hanada
- Department of Translational Research, Tsurumi University School of Dental Medicine, Yokohama 230-8501, Japan.
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Shinawi LA. Effect of denture cleaning on abrasion resistance and surface topography of polymerized CAD CAM acrylic resin denture base. Electron Physician 2017; 9:4281-4288. [PMID: 28713496 PMCID: PMC5498689 DOI: 10.19082/4281] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2017] [Accepted: 04/19/2017] [Indexed: 11/20/2022] Open
Abstract
Background The application of computer-aided design computer-aided manufacturing (CAD CAM) technology in the fabrication of complete dentures, offers numerous advantages as it provides optimum fit and eliminates polymerization shrinkage of the acrylic base. Additionally, the porosity and surface roughness of CAD CAM resins is less compared to conventionally processed resins which leads to a decrease in the adhesion of bacteria on the denture base, which is associated with many conditions including halitosis and aspiration pneumonia in elderly denture wearers. Aim To evaluate the influence of tooth brushing with dentifrices on CAD CAM resin blocks in terms of abrasion resistance, surface roughness and scanning electron photomicrography. Methods This experimental study was carried out at the Faculty of Dentistry of King Abdulaziz University during 2016. A total of 40 rectangular shaped polymerized CAD CAM resin samples were subjected to 40.000 and 60.000 brushing strokes under a 200-gram vertical load simulating three years of tooth brushing strokes using commercially available denture cleaning dentifrice. Data were analyzed by SPSS version 20, using descriptive statistics and ANOVA. Results ANOVA test revealed a statistical significant weight loss of CAD CAM acrylic resin denture base specimens following 40.000 and 60.000 brushing strokes as well as a statistical significant change (p=0.0.5) in the surface roughness following brushing. The CAD CAM resin samples SEM baseline imaging revealed a relatively smooth homogenous surface, but following 40,000 and 60,000 brushing strokes, imaging displayed the presence of small scratches on the surface. Conclusion CAD CAM resin displayed a homogenous surface initially with low surface roughness that was significantly affected following simulating three years of manual brushing, but despite the significant weight loss, the findings are within the clinically acceptable limits.
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Affiliation(s)
- Lana Ahmed Shinawi
- BDS MSc. MCD. PhD, Associate Professor and Consultant, Department of Oral and Maxillofacial Prosthodontics, Faculty of Dentistry, King Abdulaziz University, Jeddah, Saudi Arabia
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The Denture-Associated Oral Microbiome in Health and Stomatitis. mSphere 2016; 1:mSphere00215-16. [PMID: 28066812 PMCID: PMC5196032 DOI: 10.1128/msphere.00215-16] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2016] [Accepted: 11/15/2016] [Indexed: 11/20/2022] Open
Abstract
Denture stomatitis is a prevalent inflammatory condition of the mucosal tissue in denture wearers that is triggered by microorganisms. While Candida has been extensively studied for its role in stomatitis etiology, the bacterial component largely remains to be investigated. Our data show that certain types of bacteria are significantly associated with denture health and disease. Furthermore, the bacterial communities residing on the teeth and dentures of the same person are similar to each other independently of the surface, and thus, denture health could impact the maintenance of remaining teeth and vice versa. While investigation of the microbiome on natural oral surfaces has generated a wealth of information, few studies have examined the microbial communities colonizing dentures and their relationship to oral health. To address this knowledge gap, we characterized the bacterial community associated with dentures and remaining teeth in healthy individuals and patients with denture stomatitis. The microbiome compositions of matched denture and tooth plaque samples of 10 healthy individuals and 9 stomatitis patients were determined by 16S rRNA gene pyrosequencing. The microbial communities colonizing dentures and remaining teeth in health and disease were very similar to each other. Matched denture and tooth samples from the same individuals shared a significantly higher percentage of identical phylotypes than random pairs of samples from different study participants. Despite these overall similarities, several bacterial phylotypes displayed discrete health- and stomatitis-associated denture colonization, while others were distinct in health and disease independently of the surface. Certain phylotypes exhibited differential colonization of dentures and teeth independently of denture health status. In conclusion, denture and natural tooth surfaces in health and stomatitis harbor similar bacterial communities. Individual-related rather than surface-specific factors play a significant role in the bacterial phylotype composition colonizing dentures and teeth. This individual-specific mutual influence on denture and tooth surface colonization could be an important factor in maintaining oral health in denture wearers. Discrete differences in colonization patterns for distinct genera and phylotypes warrant further studies regarding their potential involvement or utility as specific indicators of health and disease development in denture-wearing individuals. IMPORTANCE Denture stomatitis is a prevalent inflammatory condition of the mucosal tissue in denture wearers that is triggered by microorganisms. While Candida has been extensively studied for its role in stomatitis etiology, the bacterial component largely remains to be investigated. Our data show that certain types of bacteria are significantly associated with denture health and disease. Furthermore, the bacterial communities residing on the teeth and dentures of the same person are similar to each other independently of the surface, and thus, denture health could impact the maintenance of remaining teeth and vice versa.
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Hunter MC, Pozhitkov AE, Noble PA. Microbial signatures of oral dysbiosis, periodontitis and edentulism revealed by Gene Meter methodology. J Microbiol Methods 2016; 131:85-101. [PMID: 27717873 DOI: 10.1016/j.mimet.2016.09.019] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2016] [Revised: 09/26/2016] [Accepted: 09/27/2016] [Indexed: 12/13/2022]
Abstract
Conceptual models suggest that certain microorganisms (e.g., the "red" complex) are indicative of a specific disease state (e.g., periodontitis); however, recent studies have questioned the validity of these models. Here, the abundances of 500+ microbial species were determined in 16 patients with clinical signs of one of the following oral conditions: periodontitis, established caries, edentulism, and oral health. Our goal was to determine if the abundances of certain microorganisms reflect dysbiosis or a specific clinical condition that could be used as a 'signature' for dental research. Microbial abundances were determined by the analysis of 138,718 calibrated probes using Gene Meter methodology. Each 16S rRNA gene was targeted by an average of 194 unique probes (n=25nt). The calibration involved diluting pooled gene target samples, hybridizing each dilution to a DNA microarray, and fitting the probe intensities to adsorption models. The fit of the model to the experimental data was used to assess individual and aggregate probe behavior; good fits (R2>0.90) were retained for back-calculating microbial abundances from patient samples. The abundance of a gene was determined from the median of all calibrated individual probes or from the calibrated abundance of all aggregated probes. With the exception of genes with low abundances (<2 arbitrary units), the abundances determined by the different calibrations were highly correlated (r~1.0). Seventeen genera were classified as 'signatures of dysbiosis' because they had significantly higher abundances in patients with periodontitis and edentulism when contrasted with health. Similarly, 13 genera were classified as 'signatures of periodontitis', and 14 genera were classified as 'signatures of edentulism'. The signatures could be used, individually or in combination, to assess the clinical status of a patient (e.g., evaluating treatments such as antibiotic therapies). Comparisons of the same patient samples revealed high false negatives (45%) for next-generation-sequencing results and low false positives (7%) for Gene Meter results.
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Affiliation(s)
- M Colby Hunter
- Program in Microbiology, Alabama State University, Montgomery, AL 36101, United States.
| | - Alex E Pozhitkov
- Department of Oral Health, University of Washington, Box 3574444, Seattle, WA, United States.
| | - Peter A Noble
- Department of Periodontics, University of Washington, Box 3574444, Seattle, WA, United States.
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Klug B, Santigli E, Westendorf C, Tangl S, Wimmer G, Grube M. From Mouth to Model: Combining in vivo and in vitro Oral Biofilm Growth. Front Microbiol 2016; 7:1448. [PMID: 27708626 PMCID: PMC5030783 DOI: 10.3389/fmicb.2016.01448] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2016] [Accepted: 08/30/2016] [Indexed: 11/13/2022] Open
Abstract
Background: Oral biofilm studies based on simplified experimental setups are difficult to interpret. Models are limited mostly by the number of bacterial species observed and the insufficiency of artificial media. Few studies have attempted to overcome these limitations and to cultivate native oral biofilm. Aims: This study aimed to grow oral biofilm in vivo before transfer to a biofilm reactor for ex situ incubation. The in vitro survival of this oral biofilm and the changes in bacterial composition over time were observed. Methods: Six human enamel-dentin slabs embedded buccally in dental splints were used as biofilm carriers. Fitted individually to the upper jaw of 25 non-smoking male volunteers, the splints were worn continuously for 48 h. During this time, tooth-brushing and alcohol-consumption were not permitted. The biofilm was then transferred on slabs into a biofilm reactor and incubated there for 48 h while being nourished in BHI medium. Live/dead staining and confocal laser scanning microscopy were used to observe bacterial survival over four points in time: directly after removal (T0) and after 1 (T1), 24 (T2), and 48 h (T3) of incubation. Bacterial diversity at T0 and T3 was compared with 454-pyrosequencing. Fluorescence in situ hybridization (FISH) was performed to show specific taxa. Survival curves were calculated with a specially designed MATLAB script. Acacia and QIIME 1.9.1 were used to process pyrosequencing data. SPSS 21.0 and R 3.3.1 were used for statistical analysis. Results: After initial fluctuations at T1, survival curves mostly showed approximation of the bacterial numbers to the initial level at T3. Pyrosequencing analysis resulted in 117 OTUs common to all samples. The genera Streptococcus and Veillonella (both Firmicutes) dominated at T0 and T3. They make up two thirds of the biofilm. Genera with lower relative abundance had grown significantly at T3. FISH analysis confirmed the pyrosequencing results, i.e., the predominant staining of Firmicutes. Conclusion: We demonstrate the in vitro survival of native primary oral biofilm in its natural complexity over 48 h. Our results offer a baseline for cultivation studies of native oral biofilms in (phyto-) pharmacological and dental materials research. Further investigations and validation of culturing conditions could also facilitate the study of biofilm-induced diseases.
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Affiliation(s)
- Barbara Klug
- Institute of Plant Sciences, University of GrazGraz, Austria; Department of Dental Medicine and Oral Health, Division of Oral Surgery and Orthodontics, Medical University of GrazGraz, Austria
| | - Elisabeth Santigli
- Department of Dental Medicine and Oral Health, Division of Oral Surgery and Orthodontics, Medical University of Graz Graz, Austria
| | | | - Stefan Tangl
- Karl Donath Laboratory for Hard Tissue and Biomaterial Research, Department of Oral Surgery, Medical University of ViennaVienna, Austria; Austrian Cluster for Tissue RegenerationVienna, Austria
| | - Gernot Wimmer
- Department of Dental Medicine and Oral Health, Division of Preventive and Operative Dentistry, Periodontology, Prosthodontics and Restorative Dentistry, Medical University of Graz Graz, Austria
| | - Martin Grube
- Institute of Plant Sciences, University of Graz Graz, Austria
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Sherry L, Lappin G, O'Donnell LE, Millhouse E, Millington OR, Bradshaw DJ, Axe AS, Williams C, Nile CJ, Ramage G. Viable Compositional Analysis of an Eleven Species Oral Polymicrobial Biofilm. Front Microbiol 2016; 7:912. [PMID: 27375612 PMCID: PMC4902011 DOI: 10.3389/fmicb.2016.00912] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2016] [Accepted: 05/27/2016] [Indexed: 12/15/2022] Open
Abstract
Purpose: Polymicrobial biofilms are abundant in clinical disease, particularly within the oral cavity. Creating complex biofilm models that recapitulate the polymicrobiality of oral disease are important in the development of new chemotherapeutic agents. In order to do this accurately we require the ability to undertake compositional analysis, in addition to determine individual cell viability, which is difficult using conventional microbiology. The aim of this study was to develop a defined multispecies denture biofilm model in vitro, and to assess viable compositional analysis following defined oral hygiene regimens. Methods: An in vitro multispecies denture biofilm containing various oral commensal and pathogenic bacteria and yeast was created on poly (methyl methacrylate) (PMMA). Denture hygiene regimens tested against the biofilm model included brushing only, denture cleansing only and combinational brushing and denture cleansing. Biofilm composition and viability were assessed by culture (CFU) and molecular (qPCR) methodologies. Scanning electron microscopy and confocal laser scanning microscopy were also employed to visualize changes in denture biofilms following treatment. Results: Combinational treatment of brushing and denture cleansing had the greatest impact on multispecies denture biofilms, reducing the number of live cells by more than 2 logs, and altering the overall composition in favor of streptococci. This was even more evident during the sequential testing, whereby daily sequential treatment reduced the total and live number of bacteria and yeast more than those treated intermittently. Bacteria and yeast remaining following treatment tended to aggregate in the pores of the PMMA, proving more difficult to fully eradicate the biofilm. Conclusions: Overall, we are the first to develop a method to enable viable compositional analysis of an 11 species denture biofilm following chemotherapeutic challenge. We were able to demonstrate viable cell reduction and changes in population dynamics following evaluation of various denture cleansing regimens. Specifically, it was demonstrated that daily combinational treatment of brushing and cleansing proved to be the most advantageous denture hygiene regimen, however, residual organisms still remained within the pores of PMMA surface, which could act as a reservoir for further biofilm regrowth. We have identified an industry need for denture cleansing agents with the capacity to penetrate these pores and disaggregate these complex biofilm consortia.
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Affiliation(s)
- Leighann Sherry
- Infection and Immunity Research Group, Glasgow Dental School, School of Medicine, College of Medical, Veterinary and Life Sciences, University of GlasgowGlasgow, UK; Institute of Healthcare Policy and Practice, School of Health, Nursing and Midwifery, University of the West of ScotlandPaisley, UK
| | - Gillian Lappin
- Infection and Immunity Research Group, Glasgow Dental School, School of Medicine, College of Medical, Veterinary and Life Sciences, University of Glasgow Glasgow, UK
| | - Lindsay E O'Donnell
- Infection and Immunity Research Group, Glasgow Dental School, School of Medicine, College of Medical, Veterinary and Life Sciences, University of Glasgow Glasgow, UK
| | - Emma Millhouse
- Infection and Immunity Research Group, Glasgow Dental School, School of Medicine, College of Medical, Veterinary and Life Sciences, University of Glasgow Glasgow, UK
| | - Owain R Millington
- Strathclyde Institute of Pharmacy and Biomedical Sciences, University of Strathclyde Glasgow, UK
| | - David J Bradshaw
- Gum Health and Dry Mouth Group, GlaxoSmithKline Consumer Healthcare Weybridge, UK
| | - Alyson S Axe
- Gum Health and Dry Mouth Group, GlaxoSmithKline Consumer Healthcare Weybridge, UK
| | - Craig Williams
- Institute of Healthcare Policy and Practice, School of Health, Nursing and Midwifery, University of the West of Scotland Paisley, UK
| | - Christopher J Nile
- Infection and Immunity Research Group, Glasgow Dental School, School of Medicine, College of Medical, Veterinary and Life Sciences, University of Glasgow Glasgow, UK
| | - Gordon Ramage
- Infection and Immunity Research Group, Glasgow Dental School, School of Medicine, College of Medical, Veterinary and Life Sciences, University of Glasgow Glasgow, UK
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Kato I, Vasquez AA, Moyerbrailean G, Land S, Sun J, Lin HS, Ram JL. Oral microbiome and history of smoking and colorectal cancer. ACTA ACUST UNITED AC 2016; 2:92-101. [PMID: 28111632 DOI: 10.5430/jer.v2n2p92] [Citation(s) in RCA: 49] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
BACKGROUND The equilibrium of oral microbiome may be altered by environmental factors, including cigarette smoking. Several recent studies also suggest that oral pathogens causing periodontal disease, such as Fusobacterium nucleatum, are involved in pathogenesis of colorectal cancer. METHODS For this study oral rinse DNA samples from 190 participants in a population-based case-control study for colorectal cancer were used to amplify a V3-V4 region of bacterial 16S rRNA gene. The amplicons were sequenced using Illumina MiSeq paired end chemistry on two runs, yielding approximately 35 million filtered reads which were assigned to bacterial phyla. RESULTS No association was found between Fusobacterium abundance or presence and colorectal cancer. However, adjusted for age and experimental batch, colorectal cancer history was associated with increased presence of genus Lactobacillus and increased relative abundance of Rothia by 28% and current smoking was associated with a 33% decrease in relative counts of Betaproteobacteria (primarily Neisseria) and 23% increase in relative abundance of Veillonellaceae family. We also found that smoking had significant effects on the 2nd component scores and 2nd coordinate distances in principal component and coordinate analyses. CONCLUSIONS It remains to be elucidated whether the observed differences can be translated into biochemical changes in oral environment, thus potentially affecting oral health.
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Affiliation(s)
- Ikuko Kato
- Department of Oncology and Pathology, Wayne State University School of Medicine, Detroit, MI, USA
| | - Adrian A Vasquez
- Department of Physiology, Wayne State University School of Medicine, Detroit, MI, USA
| | - Gregory Moyerbrailean
- Center for Molecular Medicine and Genetics, Wayne State University School of Medicine, Detroit, MI, USA
| | - Susan Land
- Department of Oncology, Wayne State University School of Medicine, Detroit, MI, USA
| | - Jun Sun
- Department of Medicine, School of Medicine, University of Illinois at Chicago, IL, USA
| | - Ho-Sheng Lin
- Department of Otolaryngology, Wayne State University School of Medicine, Detroit, MI, USA
| | - Jeffrey L Ram
- Department of Physiology, Wayne State University School of Medicine, Detroit, MI, USA
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Inhibition of multispecies biofilms by a fluoride-releasing dental prosthesis copolymer. J Dent 2016; 48:62-70. [PMID: 26948665 DOI: 10.1016/j.jdent.2016.03.001] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2016] [Revised: 02/26/2016] [Accepted: 03/01/2016] [Indexed: 12/26/2022] Open
Abstract
OBJECTIVES This study aimed to develop a new mixed-species acidogenic biofilm model and use it to assess the antimicrobial properties of a novel fluoride-releasing copolymer. METHODS Stubs composed of a copolymer of methyl methacrylate (MMA) and 2-hydroxyethyl methacrylate (HEMA) with polymethyl methacrylate (PMMA) were produced by chemically-activated free radical polymerization. A fluoride-releasing copolymer was developed by incorporating sodium fluoride in place of a portion of the PMMA. Samples were mounted in polysulfone Modified Robbins Devices (MRDs) and were optimized for single- and mixed-species biofilm formation by Candida albicans, Lactobacillus casei and Streptococcus mutans. RESULTS Fluoride release was sustained for at least 48h in flowing conditions. Fluoride did not affect the colonization and biofilm growth of any of the microorganisms in monocultures. However, in mixed-species biofilms, cell densities of all three species were reduced approximately ten-fold (p<0.05) on the fluoridated material compared with the non-fluoridated copolymer. CONCLUSIONS These data demonstrate that intermicrobial interactions in mixed-species acidogenic biofilms are sensitive to fluoride, and that the inclusion of fluoride in a denture lining copolymer reduces the formation of polymicrobial biofilms. CLINICAL SIGNIFICANCE The growth of acidogenic microorganisms on denture materials is associated with denture stomatitis and dental caries on surrounding teeth. A fluoride-releasing copolymer that inhibits acidogenic mixed-species biofilms, such as the material described in this study, has the potential to control these diseases by limiting biofilm growth.
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Schienle S, Al-Ahmad A, Kohal RJ, Bernsmann F, Adolfsson E, Montanaro L, Palmero P, Fürderer T, Chevalier J, Hellwig E, Karygianni L. Microbial adhesion on novel yttria-stabilized tetragonal zirconia (Y-TZP) implant surfaces with nitrogen-doped hydrogenated amorphous carbon (a-C:H:N) coatings. Clin Oral Investig 2015; 20:1719-32. [DOI: 10.1007/s00784-015-1655-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2015] [Accepted: 11/09/2015] [Indexed: 12/14/2022]
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Kiesow A, Sarembe S, Pizzey RL, Axe AS, Bradshaw DJ. Material compatibility and antimicrobial activity of consumer products commonly used to clean dentures. J Prosthet Dent 2015; 115:189-198.e8. [PMID: 26545863 DOI: 10.1016/j.prosdent.2015.08.010] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2015] [Revised: 07/30/2015] [Accepted: 08/02/2015] [Indexed: 11/19/2022]
Abstract
STATEMENT OF PROBLEM Regular denture cleaning is essential to good oral health, but only limited evidence is available regarding the effects of common cleaning routines. PURPOSE The purpose of this in vitro study was to determine the compatibility of denture materials with and the antimicrobial effects of typical cleaning regimens. MATERIAL AND METHODS The evaluated treatments were derived from a study of dental professional recommendations and consumer habits, including denture cleanser tablets, toothpaste, mouthwash, isopropyl alcohol (IPA), household bleach, soap, and vinegar. The material integrity of denture materials, including polymethyl methacrylate (PMMA) and metals, was evaluated by scanning electron microscopy and profilometry after treatment with laboratory regimens simulating 2 years of typical consumer use. Treatments were also evaluated in a microbial kill time assay against a range of oral microorganisms with typical treatment regimens. RESULTS Alcohol-based mouthwash and IPA damaged the surface of PMMA, and brushing with toothpaste caused scratching and surface material loss. Bleach caused limited damage to PMMA, but corroded CoCr alloy (pitting) and solder (layer formation). Denture tablets caused little damage to any materials apart from the layer formation on silver solder. Vinegar and soap were compatible with all materials. In antimicrobial assays, bleach gave excellent results, and IPA and mouthwash required concentrated dilutions to be effective. Cleanser tablets were effective at 5 minutes treatment time against all organisms. Toothpaste was effective against bacteria but not Candida albicans. Vinegar, soaps, salt, and sodium bicarbonate were microbially ineffective. CONCLUSIONS Bleach was highly antimicrobial but incompatible with metal dental prosthesis components. IPA and mouthwash were antimicrobial but damaged PMMA. Specialist denture cleanser tablets gave a good combination of microbial efficacy and reasonable material compatibility.
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Affiliation(s)
- Andreas Kiesow
- Head, Group Characterization of Medical and Cosmetic Care Products, Fraunhofer Institute for Mechanics of Materials IWM, Halle, Germany
| | - Sandra Sarembe
- Project Manager, Group Characterization of Medical and Cosmetic Care Products, Fraunhofer Institute for Mechanics of Materials IWM, Halle, Germany
| | - Robert L Pizzey
- Microbiologist, GlaxoSmithKline Consumer Healthcare, Surrey, United Kingdom
| | - Alyson S Axe
- Principal Medical Affairs Scientist, GlaxoSmithKline Consumer Healthcare, Surrey, United Kingdom
| | - David J Bradshaw
- Principal Scientist, GlaxoSmithKline Consumer Healthcare, Surrey, United Kingdom.
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Barbosa GM, Colombo AV, Rodrigues PH, Simionato MRL. Intraspecies Variability Affects Heterotypic Biofilms of Porphyromonas gingivalis and Prevotella intermedia: Evidences of Strain-Dependence Biofilm Modulation by Physical Contact and by Released Soluble Factors. PLoS One 2015; 10:e0138687. [PMID: 26406499 PMCID: PMC4583444 DOI: 10.1371/journal.pone.0138687] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2015] [Accepted: 09/02/2015] [Indexed: 11/19/2022] Open
Abstract
It is well known that strain and virulence diversity exist within the population structure of Porphyromonas gingivalis. In the present study we investigate intra- and inter-species variability in biofilm formation of Porphyromonas gingivalis and partners Prevotella intermedia and Prevotella nigrescens. All strains tested showed similar hydrophobicity, except for P. gingivalis W83 which has roughly half of the hydrophobicity of P. gingivalis ATCC33277. An intraspecies variability in coaggregation of P. gingivalis with P. intermedia was also found. The association P. gingivalis W83/P. intermedia 17 produced the thickest biofilm and strain 17 was prevalent. In a two-compartment system P. gingivalis W83 stimulates an increase in biomass of strain 17 and the latter did not stimulate the growth of P. gingivalis W83. In addition, P. gingivalis W83 also stimulates the growth of P. intermedia ATCC25611 although strain W83 was prevalent in the association with P. intermedia ATCC25611. P. gingivalis ATCC33277 was prevalent in both associations with P. intermedia and both strains of P. intermedia stimulate the growth of P. gingivalis ATCC33277. FISH images also showed variability in biofilm structure. Thus, the outcome of the association P. gingivalis/P. intermedia seems to be strain-dependent, and both soluble factors and physical contact are relevant. The association P. gingivalis-P. nigrescens ATCC33563 produced larger biomass than each monotypic biofilm, and P. gingivalis was favored in consortia, while no differences were found in the two-compartment system. Therefore, in consortia P. gingivalis-P. nigrescens physical contact seems to favor P. gingivalis growth. The intraspecies variability found in our study suggests strain-dependence in ability of microorganisms to recognize molecules in other bacteria which may further elucidate the dysbiosis event during periodontitis development giving additional explanation for periodontal bacteria, such as P. gingivalis and P. intermedia, among others, to persist and establish chronic infections in the host.
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Affiliation(s)
- Graziela Murta Barbosa
- Department of Microbiology, Institute of Biomedical Sciences, University of São Paulo, São Paulo, São Paulo, Brazil
| | - Andrea Vieira Colombo
- Department of Microbiology, Institute of Biomedical Sciences, University of São Paulo, São Paulo, São Paulo, Brazil
| | - Paulo Henrique Rodrigues
- Department of Microbiology, Institute of Biomedical Sciences, University of São Paulo, São Paulo, São Paulo, Brazil
- * E-mail: (PHR); (MRLS)
| | - Maria Regina Lorenzetti Simionato
- Department of Microbiology, Institute of Biomedical Sciences, University of São Paulo, São Paulo, São Paulo, Brazil
- * E-mail: (PHR); (MRLS)
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O’Donnell LE, Robertson D, Nile CJ, Cross LJ, Riggio M, Sherriff A, Bradshaw D, Lambert M, Malcolm J, Buijs MJ, Zaura E, Crielaard W, Brandt BW, Ramage G. The Oral Microbiome of Denture Wearers Is Influenced by Levels of Natural Dentition. PLoS One 2015; 10:e0137717. [PMID: 26368937 PMCID: PMC4569385 DOI: 10.1371/journal.pone.0137717] [Citation(s) in RCA: 71] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2015] [Accepted: 08/21/2015] [Indexed: 01/29/2023] Open
Abstract
Objectives The composition of dental plaque has been well defined, whereas currently there is limited understanding of the composition of denture plaque and how it directly influences denture related stomatitis (DS). The aims of this study were to compare the microbiomes of denture wearers, and to understand the implications of these towards inter-kingdom and host-pathogen interactions within the oral cavity. Methods Swab samples were obtained from 123 participants wearing either a complete or partial denture; the bacterial composition of each sample was determined using bar-coded illumina MiSeq sequencing of the bacterial hypervariable V4 region of 16S rDNA. Sequencing data processing was undertaken using QIIME, clustered in Operational Taxonomic Units (OTUs) and assigned to taxonomy. The dentures were sonicated to remove the microbial flora residing on the prosthesis, sonicate was then cultured using diagnostic colorex Candida media. Samples of unstimulated saliva were obtained and antimicrobial peptides (AMP) levels were measured by ELISA. Results We have shown that dental and denture plaques are significantly distinct both in composition and diversity and that the oral microbiome composition of a denture wearer is variable and is influenced by the location within the mouth. Dentures and mucosa were predominantly made up of Bacilli and Actinobacteria. Moreover, the presence of natural teeth has a significant impact on the overall microbial composition, when compared to the fully edentulous. Furthermore, increasing levels of Candida spp. positively correlate with Lactobacillus spp. AMPs were quantified, though showed no specific correlations. Conclusions This is the first study to provide a detailed understanding of the oral microbiome of denture wearers and has provided evidence that DS development is more complex than simply a candidal infection. Both fungal and bacterial kingdoms clearly play a role in defining the progression of DS, though we were unable to show a defined role for AMPs.
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Affiliation(s)
- Lindsay E. O’Donnell
- Glasgow Dental School, School of Medicine, College of Medicine, Veterinary and Life Sciences, University of Glasgow, 378 Sauchiehall Street, Glasgow, G2 3JZ, United Kingdom
| | - Douglas Robertson
- Glasgow Dental School, School of Medicine, College of Medicine, Veterinary and Life Sciences, University of Glasgow, 378 Sauchiehall Street, Glasgow, G2 3JZ, United Kingdom
| | - Christopher J. Nile
- Glasgow Dental School, School of Medicine, College of Medicine, Veterinary and Life Sciences, University of Glasgow, 378 Sauchiehall Street, Glasgow, G2 3JZ, United Kingdom
| | - Laura J. Cross
- Glasgow Dental School, School of Medicine, College of Medicine, Veterinary and Life Sciences, University of Glasgow, 378 Sauchiehall Street, Glasgow, G2 3JZ, United Kingdom
| | - Marcello Riggio
- Glasgow Dental School, School of Medicine, College of Medicine, Veterinary and Life Sciences, University of Glasgow, 378 Sauchiehall Street, Glasgow, G2 3JZ, United Kingdom
| | - Andrea Sherriff
- Glasgow Dental School, School of Medicine, College of Medicine, Veterinary and Life Sciences, University of Glasgow, 378 Sauchiehall Street, Glasgow, G2 3JZ, United Kingdom
| | - David Bradshaw
- GlaxoSmithKline, St Georges Avenue, Weybridge, Surrey, United Kingdom
| | - Margaret Lambert
- GlaxoSmithKline, St Georges Avenue, Weybridge, Surrey, United Kingdom
| | - Jennifer Malcolm
- Glasgow Dental School, School of Medicine, College of Medicine, Veterinary and Life Sciences, University of Glasgow, 378 Sauchiehall Street, Glasgow, G2 3JZ, United Kingdom
| | - Mark J. Buijs
- Department of Preventive Dentistry, Academic Centre for Dentistry Amsterdam, University of Amsterdam and VU University Amsterdam, Amsterdam, the Netherlands
| | - Egija Zaura
- Department of Preventive Dentistry, Academic Centre for Dentistry Amsterdam, University of Amsterdam and VU University Amsterdam, Amsterdam, the Netherlands
| | - Wim Crielaard
- Department of Preventive Dentistry, Academic Centre for Dentistry Amsterdam, University of Amsterdam and VU University Amsterdam, Amsterdam, the Netherlands
| | - Bernd W. Brandt
- Department of Preventive Dentistry, Academic Centre for Dentistry Amsterdam, University of Amsterdam and VU University Amsterdam, Amsterdam, the Netherlands
| | - Gordon Ramage
- Glasgow Dental School, School of Medicine, College of Medicine, Veterinary and Life Sciences, University of Glasgow, 378 Sauchiehall Street, Glasgow, G2 3JZ, United Kingdom
- * E-mail:
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O'Donnell LE, Millhouse E, Sherry L, Kean R, Malcolm J, Nile CJ, Ramage G. PolymicrobialCandidabiofilms: friends and foe in the oral cavity. FEMS Yeast Res 2015; 15:fov077. [DOI: 10.1093/femsyr/fov077] [Citation(s) in RCA: 63] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/14/2015] [Indexed: 12/26/2022] Open
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Abstract
Oral Biofilms are one of the most complex and diverse ecosystem developed by successive colonization of more than 600 bacterial taxa. Development starts with the attachment of early colonizers such as Actinomyces species and oral streptococci on the acquired pellicle and tooth enamel. These bacteria not only adhere to tooth surface but also interact with each other and lay foundation for attachment of bridging colonizer such as Fusobacterium nucleatum followed by late colonizers including the red complex species: Porphyromonas gingivalis, Tannerella forsythia and Treponema denticola-the founders of periodontal disease. As the biofilm progresses from supragingival sites to subgingival sites, the environment changes from aerobic to anaerobic thus favoring the growth of mainly Gram-negative obligate anaerobes while restricting the growth of the early Gram-positive facultative aerobes. Microbes present at supragingival level are mainly related to gingivitis and root-caries whereas subgingival species advance the destruction of teeth supporting tissues and thus causing periodontitis. This review summarizes our present understanding and recent developments on the characteristic features of supra- and subgingival biofilms, interaction between different genera and species of bacteria constituting these biofilms and draws our attention to the role of some of the recently discovered members of the oral community.
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Cavalcanti YW, Morse DJ, da Silva WJ, Del-Bel-Cury AA, Wei X, Wilson M, Milward P, Lewis M, Bradshaw D, Williams DW. Virulence and pathogenicity of Candida albicans is enhanced in biofilms containing oral bacteria. BIOFOULING 2015; 31:27-38. [PMID: 25574582 DOI: 10.1080/08927014.2014.996143] [Citation(s) in RCA: 62] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
This study examined the influence of bacteria on the virulence and pathogenicity of candidal biofilms. Mature biofilms (Candida albicans-only, bacteria-only, C. albicans with bacteria) were generated on acrylic and either analysed directly, or used to infect a reconstituted human oral epithelium (RHOE). Analyses included Candida hyphae enumeration and assessment of Candida virulence gene expression. Lactate dehydrogenase (LDH) activity and Candida tissue invasion following biofilm infection of the RHOE were also measured. Candida hyphae were more prevalent (p < 0.05) in acrylic biofilms also containing bacteria, with genes encoding secreted aspartyl-proteinases (SAP4/SAP6) and hyphal-wall protein (HWP1) up-regulated (p < 0.05). Candida adhesin genes (ALS3/EPA1), SAP6 and HWP1 were up-regulated in mixed-species biofilm infections of RHOE. Multi-species infections exhibited higher hyphal proportions (p < 0.05), up-regulation of IL-18, higher LDH activity and tissue invasion. As the presence of bacteria in acrylic biofilms promoted Candida virulence, consideration should be given to the bacterial component when managing denture biofilm associated candidoses.
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Novel Broad-Spectrum Antimicrobial Photoinactivation of In Situ Oral Biofilms by Visible Light plus Water-Filtered Infrared A. Appl Environ Microbiol 2014; 80:7324-36. [PMID: 25239897 DOI: 10.1128/aem.02490-14] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2014] [Accepted: 09/13/2014] [Indexed: 11/20/2022] Open
Abstract
Antimicrobial photodynamic therapy (APDT) has gained increased attention as an alternative treatment approach in various medical fields. However, the effect of APDT using visible light plus water-filtered infrared A (VIS + wIRA) on oral biofilms remains unexplored. For this purpose, initial and mature oral biofilms were obtained in situ; six healthy subjects wore individual upper jaw acrylic devices with bovine enamel slabs attached to their proximal sites for 2 h or 3 days. The biofilms were incubated with 100 μg ml(-1) toluidine blue O (TB) or chlorin e6 (Ce6) and irradiated with VIS + wIRA with an energy density of 200 mW cm(-2) for 5 min. After cultivation, the CFU of half of the treated biofilm samples were quantified, whereas following live/dead staining, the other half of the samples were monitored by confocal laser scanning microscopy (CLSM). TB- and Ce6-mediated APDT yielded a significant decrease of up to 3.8 and 5.7 log10 CFU for initial and mature oral biofilms, respectively. Quantification of the stained photoinactivated microorganisms confirmed these results. Overall, CLSM revealed the diffusion of the tested photosensitizers into the deepest biofilm layers after exposure to APDT. In particular, Ce6-aided APDT presented elevated permeability and higher effectiveness in eradicating 89.62% of biofilm bacteria compared to TB-aided APDT (82.25%) after 3 days. In conclusion, antimicrobial photoinactivation using VIS + wIRA proved highly potent in eradicating oral biofilms. Since APDT excludes the development of microbial resistance, it could supplement the pharmaceutical treatment of periodontitis or peri-implantitis.
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Teles R, Teles F, Frias-Lopez J, Paster B, Haffajee A. Lessons learned and unlearned in periodontal microbiology. Periodontol 2000 2014; 62:95-162. [PMID: 23574465 PMCID: PMC3912758 DOI: 10.1111/prd.12010] [Citation(s) in RCA: 227] [Impact Index Per Article: 22.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
Periodontal diseases are initiated by bacterial species living in polymicrobial biofilms at or below the gingival margin and progress largely as a result of the inflammation elicited by specific subgingival species. In the past few decades, efforts to understand the periodontal microbiota have led to an exponential increase in information about biofilms associated with periodontal health and disease. In fact, the oral microbiota is one of the best-characterized microbiomes that colonize the human body. Despite this increased knowledge, one has to ask if our fundamental concepts of the etiology and pathogenesis of periodontal diseases have really changed. In this article we will review how our comprehension of the structure and function of the subgingival microbiota has evolved over the years in search of lessons learned and unlearned in periodontal microbiology. More specifically, this review focuses on: (i) how the data obtained through molecular techniques have impacted our knowledge of the etiology of periodontal infections; (ii) the potential role of viruses in the etiopathogenesis of periodontal diseases; (iii) how concepts of microbial ecology have expanded our understanding of host-microbe interactions that might lead to periodontal diseases; (iv) the role of inflammation in the pathogenesis of periodontal diseases; and (v) the impact of these evolving concepts on therapeutic and preventive strategies to periodontal infections. We will conclude by reviewing how novel systems-biology approaches promise to unravel new details of the pathogenesis of periodontal diseases and hopefully lead to a better understanding of their mechanisms.
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Boon E, Meehan CJ, Whidden C, Wong DHJ, Langille MGI, Beiko RG. Interactions in the microbiome: communities of organisms and communities of genes. FEMS Microbiol Rev 2014; 38:90-118. [PMID: 23909933 PMCID: PMC4298764 DOI: 10.1111/1574-6976.12035] [Citation(s) in RCA: 146] [Impact Index Per Article: 14.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2013] [Revised: 07/02/2013] [Accepted: 07/10/2013] [Indexed: 12/17/2022] Open
Abstract
A central challenge in microbial community ecology is the delineation of appropriate units of biodiversity, which can be taxonomic, phylogenetic, or functional in nature. The term 'community' is applied ambiguously; in some cases, the term refers simply to a set of observed entities, while in other cases, it requires that these entities interact with one another. Microorganisms can rapidly gain and lose genes, potentially decoupling community roles from taxonomic and phylogenetic groupings. Trait-based approaches offer a useful alternative, but many traits can be defined based on gene functions, metabolic modules, and genomic properties, and the optimal set of traits to choose is often not obvious. An analysis that considers taxon assignment and traits in concert may be ideal, with the strengths of each approach offsetting the weaknesses of the other. Individual genes also merit consideration as entities in an ecological analysis, with characteristics such as diversity, turnover, and interactions modeled using genes rather than organisms as entities. We identify some promising avenues of research that are likely to yield a deeper understanding of microbial communities that shift from observation-based questions of 'Who is there?' and 'What are they doing?' to the mechanistically driven question of 'How will they respond?'
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Affiliation(s)
- Eva Boon
- Department of Biology, Dalhousie University, Halifax, NS, Canada
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Katharios-Lanwermeyer S, Xi C, Jakubovics NS, Rickard AH. Mini-review: Microbial coaggregation: ubiquity and implications for biofilm development. BIOFOULING 2014; 30:1235-1251. [PMID: 25421394 DOI: 10.1080/08927014.2014.976206] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Coaggregation is the specific recognition and adherence of genetically distinct microorganisms. Because most biofilms are polymicrobial communities, there is potential for coaggregation to play an integral role in spatiotemporal biofilm development and the moderation of biofilm community composition. However, understanding of the mechanisms contributing to coaggregation and the relevance of coaggregation to biofilm ecology is at a very early stage. The purpose of this review is to highlight recent advances in the understanding of microbial coaggregation within different environments and to describe the possible ecological ramifications of such interactions. Bacteria that coaggregate with many partner species within different environments will be highlighted, including oral streptococci and oral bridging organisms such as fusobacteria, as well as the freshwater sphingomonads and acinetobacters. Irrespective of environment, it is proposed that coaggregation is essential for the orchestrated development of multi-species biofilms.
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Affiliation(s)
- S Katharios-Lanwermeyer
- a Department of Environmental Health Sciences , University of Michigan , Ann Arbor , MI , USA
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48
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URUSHIBARA Y, OHSHIMA T, SATO M, HAYASHI Y, HAYAKAWA T, MAEDA N, OHKUBO C. An analysis of the biofilms adhered to framework alloys using in vitro denture plaque models. Dent Mater J 2014; 33:402-14. [DOI: 10.4012/dmj.2013-325] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Efficacy of various side-to-side toothbrushes for noncontact biofilm removal. Clin Oral Investig 2013; 18:793-800. [DOI: 10.1007/s00784-013-1047-7] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2013] [Accepted: 07/03/2013] [Indexed: 10/26/2022]
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50
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Socransky SS, Haffajee AD, Teles R, Wennstrom JL, Lindhe J, Bogren A, Hasturk H, van Dyke T, Wang X, Goodson JM. Effect of periodontal therapy on the subgingival microbiota over a 2-year monitoring period. I. Overall effect and kinetics of change. J Clin Periodontol 2013; 40:771-80. [PMID: 23710672 DOI: 10.1111/jcpe.12117] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/22/2013] [Indexed: 11/30/2022]
Abstract
AIM To examine the 2-year post-therapy kinetics of change in the composition of subgingival biofilms. MATERIAL AND METHODS In this study, 178 chronic periodontitis subjects were recruited and clinically monitored at baseline, 3, 6, 12, 18 and 24 months after therapy. All subjects received scaling and root planing and 156 one or more of periodontal surgery, systemically administered amoxicillin + metronidazole or local tetracycline at pockets ≥5 mm. Subgingival biofilm samples taken from each subject at each time point were analysed for their content of 40 bacterial species using checkerboard DNA-DNA hybridization. The significance of changes in median species counts over time was sought using the Wilcoxon or Friedman tests and adjusted for multiple comparisons. RESULTS Mean counts were significantly reduced from baseline to 2 years for 30 of the 40 taxa. Marked reductions were observed for periodontal pathogens including Tannerella forsythia, Treponema denticola and Eubacterium nodatum. The kinetics of change differed from species to species. When data were subset according to baseline PD, patterns of change in the microbial profiles were generally similar. CONCLUSION Periodontal therapy leads to a rapid reduction in periodontal pathogens, followed by a slower reduction in other taxa that can be sustained for at least 2 years.
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Affiliation(s)
- Sigmund S Socransky
- Department of Applied Oral Sciences, Center for Periodontology, The Forsyth Institute, Cambridge, MA, USA
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