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Tan J, Lamont GJ, Scott DA. Tobacco-enhanced biofilm formation by Porphyromonas gingivalis and other oral microbes. Mol Oral Microbiol 2024; 39:270-290. [PMID: 38229003 PMCID: PMC11250950 DOI: 10.1111/omi.12450] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2023] [Revised: 12/08/2023] [Accepted: 12/25/2023] [Indexed: 01/18/2024]
Abstract
Microbial biofilms promote pathogenesis by disguising antigens, facilitating immune evasion, providing protection against antibiotics and other antimicrobials and, generally, fostering survival and persistence. Environmental fluxes are known to influence biofilm formation and composition, with recent data suggesting that tobacco and tobacco-derived stimuli are particularly important mediators of biofilm initiation and development in vitro and determinants of polymicrobial communities in vivo. The evidence for tobacco-augmented biofilm formation by oral bacteria, tobacco-induced oral dysbiosis, tobacco-resistance strategies, and bacterial physiology is summarized herein. A general overview is provided alongside specific insights gained through studies of the model and archetypal, anaerobic, Gram-negative oral pathobiont, Porphyromonas gingivalis.
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Affiliation(s)
- Jinlian Tan
- Department of Oral Immunology and Infectious Diseases,
University of Louisville, Louisville, KY, USA
| | - Gwyneth J. Lamont
- Department of Oral Immunology and Infectious Diseases,
University of Louisville, Louisville, KY, USA
| | - David A. Scott
- Department of Oral Immunology and Infectious Diseases,
University of Louisville, Louisville, KY, USA
- Center for Microbiomics, Inflammation and Pathogenicity,
University of Louisville, Louisville, KY, USA
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2
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Simpson A, Johnston W, Carda-Diéguez M, Mira A, Easton C, Henriquez FL, Culshaw S, Rosier BT, Burleigh M. Periodontal treatment causes a longitudinal increase in nitrite-producing bacteria. Mol Oral Microbiol 2024. [PMID: 39169836 DOI: 10.1111/omi.12479] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2024] [Accepted: 07/14/2024] [Indexed: 08/23/2024]
Abstract
BACKGROUND The oral microbiome-dependent nitrate (NO3 -)-nitrite (NO2 -)-nitric oxide (NO) pathway may help regulate blood pressure. NO2 --producing bacteria in subgingival plaque are reduced in relative abundance in patients with untreated periodontitis compared with periodontally healthy patients. In periodontitis patients, the NO2 --producing bacteria increase several months after periodontal treatment. The early effects of periodontal treatment on NO2 --producing bacteria and the NO3 --NO2 --NO pathway remain unknown. The aim of this study was to determine how periodontal treatment affects the oral NO2 --producing microbiome and salivary NO3 - and NO2 - levels over time. METHODS The subgingival microbiota of 38 periodontitis patients was analysed before (baseline [BL]) and 1, 7 and 90 days after periodontal treatment. Changes in NO2 --producing bacteria and periodontitis-associated bacteria were determined by 16s rRNA Illumina sequencing. Saliva samples were collected at all-time points to determine NO3 - and NO2 - levels using gas-phase chemiluminescence. RESULTS A significant increase was observed in the relative abundance of NO2 --producing species between BL and all subsequent timepoints (all p < 0.001). Periodontitis-associated species decreased at all timepoints, relative to BL (all p < 0.02). NO2 --producing species negatively correlated with periodontitis-associated species at all timepoints, with this relationship strongest 90 days post-treatment (ρ = -0.792, p < 0.001). Despite these findings, no significant changes were found in salivary NO3 - and NO2 - over time (all p > 0.05). CONCLUSIONS Periodontal treatment induced an immediate increase in the relative abundance of health-associated NO2 --producing bacteria. This increase persisted throughout periodontal healing. Future studies should test the effect of periodontal treatment combined with NO3 - intake on periodontal and cardiovascular health.
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Affiliation(s)
- Annabel Simpson
- Sport and Physical Activity Research Institute, University of the West of Scotland, Blantyre, UK
| | - William Johnston
- School of Biological and Biomedical Sciences, Glasgow Caledonian University, Glasgow, UK
| | - Miguel Carda-Diéguez
- Department of Health and Genomics, Centre for Advanced Research in Public Health, FISABIO Foundation, Valencia, Spain
| | - Alex Mira
- Department of Health and Genomics, Centre for Advanced Research in Public Health, FISABIO Foundation, Valencia, Spain
| | - Chris Easton
- Sport and Physical Activity Research Institute, University of the West of Scotland, Blantyre, UK
| | - Fiona L Henriquez
- Sport and Physical Activity Research Institute, University of the West of Scotland, Blantyre, UK
| | - Shauna Culshaw
- Oral Sciences, University of Glasgow Dental School, College of Medical, Veterinary and Life Sciences, University of Glasgow, Glasgow, UK
| | - Bob T Rosier
- Department of Health and Genomics, Centre for Advanced Research in Public Health, FISABIO Foundation, Valencia, Spain
| | - Mia Burleigh
- Sport and Physical Activity Research Institute, University of the West of Scotland, Blantyre, UK
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Bumm CV, Schwendicke F, Heck K, Frasheri I, Summer B, Ern C, Heym R, Werner N, Folwaczny M. The Role of Interleukin-8 in the Estimation of Responsiveness to Steps 1 and 2 of Periodontal Therapy. J Clin Periodontol 2024. [PMID: 39152683 DOI: 10.1111/jcpe.14055] [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: 10/26/2023] [Revised: 07/03/2024] [Accepted: 07/23/2024] [Indexed: 08/19/2024]
Abstract
OBJECTIVE To investigate the association between interleukin-8 (IL-8) levels in gingival crevicular fluid (GCF) and total oral fluid (TOF) and the responsiveness to steps 1 and 2 of periodontal therapy. MATERIALS AND METHODS One-hundred and fifty-nine patients affected by periodontitis received steps 1 and 2 of periodontal therapy. At baseline, TOF and GCF samples were collected and analysed for IL-8 (Il-8TOF/IL-8GCF) using flow cytometry. Therapy outcomes were relative proportions of residual periodontal pockets (PPD%), pocket closure (PC) rates and pocket probing depth (PPD) reductions; these were associated with IL-8TOF/IL-8GCF. RESULTS High IL-8TOF was significantly associated with higher residual PPD% (p = 0.044) and lower PPD reduction compared to low IL-8TOF (high 0.79 ± 1.20 mm vs. low 1.20 ± 1.20 mm, p < 0.001) in non-smokers, while in smokers high IL-8GCF was related to lower PPD reduction (high 0.62 ± 1.22 mm vs. low 0.84 ± 1.12 mm, p = 0.009). Furthermore, high baseline IL-8TOF was significantly associated with poorer PC rates compared to medium and low concentrations in both non-smokers (high 41% vs. medium 55% vs. low 58%, p < 0.001) and smokers (high 34% vs. medium 44% vs. low 46%, p < 0.001). CONCLUSION High IL-8 concentrations at baseline had a significant impact on residual PPD%, PC rates and PPD reduction. The findings suggest that, especially in non-smokers, baseline IL-8 levels collected from the TOF could serve as a component in the estimation of responsiveness to steps 1 and 2 of periodontal therapy.
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Affiliation(s)
- Caspar Victor Bumm
- Department of Conservative Dentistry and Periodontology, LMU University Hospital, LMU Munich, Munich, Germany
- Private Practice, Munich, Germany
| | - Falk Schwendicke
- Department of Conservative Dentistry and Periodontology, LMU University Hospital, LMU Munich, Munich, Germany
| | - Katrin Heck
- Department of Conservative Dentistry and Periodontology, LMU University Hospital, LMU Munich, Munich, Germany
| | - Iris Frasheri
- Department of Conservative Dentistry and Periodontology, LMU University Hospital, LMU Munich, Munich, Germany
| | - Burkhard Summer
- Department of Dermatology and Allergy, LMU University Hospital, LMU Munich, Munich, Germany
| | | | | | - Nils Werner
- Department of Conservative Dentistry and Periodontology, LMU University Hospital, LMU Munich, Munich, Germany
| | - Matthias Folwaczny
- Department of Conservative Dentistry and Periodontology, LMU University Hospital, LMU Munich, Munich, Germany
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4
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Singhrao SK, Consoli C, Dennison SR, Kanagasingam S, Welbury R. Porphyromonas gingivalis LPS and Actinomyces naeslundii Conditioned Medium Enhance the Release of a Low Molecular Weight, Transcriptionally Active, Fragment of Glycogen Synthase-3 Kinase in IMR-32 Cell Line. J Alzheimers Dis Rep 2024; 8:1055-1067. [PMID: 39114545 PMCID: PMC11305843 DOI: 10.3233/adr-240066] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2024] [Accepted: 06/19/2024] [Indexed: 08/10/2024] Open
Abstract
Background Glycogen synthase-3 kinase (GSK3) is one of the major contributors of tau hyperphosphorylation linked to neurofibrillary tangles in Alzheimer's disease (AD). Objective To determine a mechanism of GSK-3β activation by two periodontal bacteria consistently confirmed in AD autopsied brains. Methods Porphyromonas gingivalis FDC381 and Actinomyces naeslundii ATCC10301 conditioned media were collected. IMR-32 cells were challenged for 48 h with the conditioned media alongside P. gingivalis (ATCC33277) ultrapurified lipopolysaccharide (LPS) designated Pg.LPS under established cell culture conditions either alone or combined. Gene expression and protein analyses for GSK-3β were carried out. Results qPCR demonstrated that GSK-3β gene was overexpressed in IMR-32 cells treated with Pg.LPS with a 2.09-fold change (p = 0.0005), while A. naeslundii treated cells demonstrated 1.41-fold change (p = 0.004). Western blotting of the cells challenged with Pg.LPS (p = 0.01) and A. naeslundii conditioned medium (p = 0.001) demonstrated the 37 kDa band for each treatment with variable intensity across the medium control. Immunohistochemistry with the GSK-3β of the IMR-32 cells challenged with Pg.LPS and A. naeslundii alone demonstrated cytoplasmic and nuclear localization. Conclusions Exposure to various bacterial factors upregulated the gene expression of GSK-3β. Western blotting for GSK-3β confirmed the presence of the cleaved fragment by Pg.LPS (37 kDa band p = 0.01) and A. naeslundii conditioned medium (37 kDa band p = 0.001). Immunostaining demonstrated both cytoplasmic and nuclear localization of GSK-3β. Therefore, Pg.LPS and an unknown factor from the A. naeslundii conditioned medium mediated GSK-3β activation via its transcriptionally active, cleaved, fragment. These virulence factors in the body appear to be detrimental to brain health.
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Affiliation(s)
- Sim K. Singhrao
- School of Medicine and Dentistry, University of Central Lancashire, Preston, UK
| | - Claudia Consoli
- Central Biotechnology Services, College of Biomedical and Life Sciences, Cardiff University, Cardiff, UK
| | - Sarah R. Dennison
- School of Pharmacy and Biomedical Sciences, University of Central Lancashire, Preston, UK
| | | | - Richard Welbury
- School of Medicine and Dentistry, University of Central Lancashire, Preston, UK
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5
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MohanaSundaram A, Gohil NV, Etekochay MO, Patel P, Gurajala S, Sathanantham ST, Nsengiyumva M, Kumar S, Emran TB. Mycobacterium tuberculosis : a new hitchhiker in the etiopathogenesis of periodontitis. Int J Surg 2024; 110:3606-3616. [PMID: 38231241 PMCID: PMC11175725 DOI: 10.1097/js9.0000000000001122] [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: 11/04/2023] [Accepted: 01/09/2024] [Indexed: 01/18/2024]
Abstract
Periodontitis, a chronic inflammatory disease of the gums affects both the ligament and alveolar bone. A severe form of periodontal disease affects a strikingly high number of one billion adults globally. The disease permutes both the soft and hard tissues of the oral cavity leading to localized and systemic diseases. Periodontitis has a deleterious impact on systemic health causing diabetes, cardiovascular diseases (CVD), and other disease. The cause of the enhanced inflammatory process is due to dysbiosis and an unregulated immune response. Innate immune response and T cells trigger uninhibited cytokine release causing an unwarranted inflammatory response. The RANK- RANKL interaction between osteoblasts, immune cells, and progenitor osteoclasts results in the maturation of osteoclasts, which promote bone resorption. It is well established that dysbiosis of the oral cavity has been implicated in periodontitis. But emerging reports suggest that the pulmonary pathogen, Mycobacterium tuberculosis (Mtb), causes extrapulmonary diseases such as periodontitis. Many clinical case reports advocate the involvement of Mtb in periodontitis, which poses a threat with the surge of tuberculosis in HIV and other immunocompromised individuals. Fostering a better understanding of the mechanism, causative agents and control on inflammatory response is imperative in the prevention and treatment of periodontitis.
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Affiliation(s)
| | | | | | | | - Swathi Gurajala
- College of Applied Medical Sciences in Jubail, Imam Abdulrahman bin Faisal University, Saudi Arabia
| | | | | | - Santosh Kumar
- Karnavati School of Dentistry Karnavati University Gandhinagar Gujarat, India
| | - Talha Bin Emran
- Department of Pharmacy, BGC Trust University Bangladesh, Chittagong, Bangladesh
- Department of Pharmacy, Faculty of Allied Health Sciences, Daffodil International University, Dhaka, Bangladesh
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6
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Dai X, Liang R, Dai M, Li X, Zhao W. Smoking Impacts Alzheimer's Disease Progression Through Oral Microbiota Modulation. Mol Neurobiol 2024:10.1007/s12035-024-04241-1. [PMID: 38795302 DOI: 10.1007/s12035-024-04241-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2023] [Accepted: 05/13/2024] [Indexed: 05/27/2024]
Abstract
Alzheimer's disease (AD) is an important public health challenge with a limited understanding of its pathogenesis. Smoking is a significant modifiable risk factor for AD progression, and its specific mechanism is often interpreted from a toxicological perspective. However, microbial infections also contribute to AD, with oral microbiota playing a crucial role in its progression. Notably, smoking alters the ecological structure and pathogenicity of the oral microbiota. Currently, there is no systematic review or summary of the relationship between these three factors; thus, understanding this association can help in the development of new treatments. This review summarizes the connections between smoking, AD, and oral microbiota from existing research. It also explores how smoking affects the occurrence and development of AD through oral microbiota, and examines treatments for oral microbiota that delay the progression of AD. Furthermore, this review emphasizes the potential of the oral microbiota to act as a biomarker for AD. Finally, it considers the feasibility of probiotics and oral antibacterial therapy to expand treatment methods for AD.
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Affiliation(s)
- Xingzhu Dai
- Department of Stomatology, Guangdong Provincial People's Hospital (Guangdong Academy of Medical Sciences), Southern Medical University, Guangzhou, China
- Department of Stomatology, Nanfang Hospital, Southern Medical University, Guangzhou, China
| | - Rui Liang
- Department of Stomatology, Nanfang Hospital, Southern Medical University, Guangzhou, China
| | - Manqiong Dai
- Department of Stomatology, Nanfang Hospital, Southern Medical University, Guangzhou, China
| | - Xiaoyu Li
- Department of Stomatology, Nanfang Hospital, Southern Medical University, Guangzhou, China
| | - Wanghong Zhao
- Department of Stomatology, Nanfang Hospital, Southern Medical University, Guangzhou, China.
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Chattopadhyay S, Malayil L, Chopyk J, Smyth E, Kulkarni P, Raspanti G, Thomas SB, Sapkota A, Mongodin EF, Sapkota AR. Oral microbiome dysbiosis among cigarette smokers and smokeless tobacco users compared to non-users. Sci Rep 2024; 14:10394. [PMID: 38710815 DOI: 10.1038/s41598-024-60730-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2023] [Accepted: 04/26/2024] [Indexed: 05/08/2024] Open
Abstract
Tobacco use significantly influences the oral microbiome. However, less is known about how different tobacco products specifically impact the oral microbiome over time. To address this knowledge gap, we characterized the oral microbiome of cigarette users, smokeless tobacco users, and non-users over 4 months (four time points). Buccal swab and saliva samples (n = 611) were collected from 85 participants. DNA was extracted from all samples and sequencing was carried out on an Illumina MiSeq, targeting the V3-V4 region of the 16S rRNA gene. Cigarette and smokeless tobacco users had more diverse oral bacterial communities, including a higher relative abundance of Firmicutes and a lower relative abundance of Proteobacteria, when compared to non-users. Non-users had a higher relative abundance of Actinomyces, Granulicatella, Haemophilus, Neisseria, Oribacterium, Prevotella, Pseudomonas, Rothia, and Veillonella in buccal swab samples, compared to tobacco users. While the most abundant bacterial genera were relatively constant over time, some species demonstrated significant shifts in relative abundance between the first and last time points. In addition, some opportunistic pathogens were detected among tobacco users including Neisseria subflava, Bulleidia moorei and Porphyromonas endodontalis. Overall, our results provide a more holistic understanding of the structure of oral bacterial communities in tobacco users compared to non-users.
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Affiliation(s)
- Suhana Chattopadhyay
- Department of Global, Environmental, and Occupational Health, School of Public Health, University of Maryland, College Park, MD, USA
| | - Leena Malayil
- Department of Global, Environmental, and Occupational Health, School of Public Health, University of Maryland, College Park, MD, USA
| | - Jessica Chopyk
- Department of Global, Environmental, and Occupational Health, School of Public Health, University of Maryland, College Park, MD, USA
| | - Eoghan Smyth
- Department of Global, Environmental, and Occupational Health, School of Public Health, University of Maryland, College Park, MD, USA
| | - Prachi Kulkarni
- Department of Global, Environmental, and Occupational Health, School of Public Health, University of Maryland, College Park, MD, USA
| | - Greg Raspanti
- Department of Global, Environmental, and Occupational Health, School of Public Health, University of Maryland, College Park, MD, USA
| | - Stephen B Thomas
- Center for Health Equity, School of Public Health, University of Maryland, College Park, MD, USA
| | - Amir Sapkota
- Department of Epidemiology and Biostatistics, School of Public Health, University of Maryland, College Park, MD, USA
| | - Emmanuel F Mongodin
- Department of Microbiology and Immunology, Institute for Genome Sciences, University of Maryland School of Medicine, Baltimore, MD, USA
- Division of Lung Diseases, National Institutes of Health (NIH), National Heart, Lung and Blood Institute (NHLBI), Bethesda, MD, USA
| | - Amy R Sapkota
- Department of Global, Environmental, and Occupational Health, School of Public Health, University of Maryland, College Park, MD, USA.
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Ye X, Paul B, Mo J, Reynolds EC, Ghosal D, Veith PD. Ultrastructural and glycoproteomic characterization of Prevotella intermedia: Insights into O-glycosylation and outer membrane vesicles. Microbiologyopen 2024; 13:e1401. [PMID: 38409911 PMCID: PMC10897501 DOI: 10.1002/mbo3.1401] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2023] [Revised: 02/08/2024] [Accepted: 02/16/2024] [Indexed: 02/28/2024] Open
Abstract
Prevotella intermedia, a Gram-negative bacterium from the Bacteroidota phylum, is associated with periodontitis. Other species within this phylum are known to possess the general O-glycosylation system. The O-glycoproteome has been characterized in several species, including Tannerella forsythia, Porphyromonas gingivalis, and Flavobacterium johnsoniae. In our study, we used electron cryotomography (cryoET) and glycoproteomics to reveal the ultrastructure of P. intermedia and characterize its O-glycoproteome. Our cryoET analysis unveiled the ultrastructural details of the cell envelope and outer membrane vesicles (OMVs) of P. intermedia. We observed an electron-dense surface layer surrounding both cells and OMVs. The OMVs were often large (>200 nm) and presented two types, with lumens being either electron-dense or translucent. LC-MS/MS analyses of P. intermedia fractions led to the identification of 1655 proteins, which included 62 predicted T9SS cargo proteins. Within the glycoproteome, we identified 443 unique O-glycosylation sites within 224 glycoproteins. Interestingly, the O-glycosylation motif exhibited a broader range than reported in other species, with O-glycosylation found at D(S/T)(A/I/L/M/T/V/S/C/G/F/N/E/Q/D/P). We identified a single O-glycan with a delta mass of 1531.48 Da. Its sequence was determined by MS2 and MS3 analyses using both collision-induced dissociation and high-energy collisional dissociation fragmentation modes. After partial deglycosylation with trifluoromethanesulfonic acid, the O-glycan sequence was confirmed to be dHex-dHex-HexNAc (HPO3 -C6 H12 O5 )-dHex-Hex-HexA-Hex(dHex). Bioinformatic analyses predicted the localization of O-glycoproteins, with 73 periplasmic proteins, 53 inner membrane proteins, 52 lipoproteins, 26 outer membrane proteins, and 14 proteins secreted by the T9SS.
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Affiliation(s)
- Xi Ye
- Department of Biochemistry and Pharmacology, Bio21 Molecular Science and Biotechnology InstituteThe University of MelbourneMelbourneVictoriaAustralia
- Oral Health Cooperative Research Centre, Melbourne Dental School, Bio21 InstituteThe University of MelbourneParkvilleVictoriaAustralia
| | - Bindusmita Paul
- Department of Biochemistry and Pharmacology, Bio21 Molecular Science and Biotechnology InstituteThe University of MelbourneMelbourneVictoriaAustralia
- Oral Health Cooperative Research Centre, Melbourne Dental School, Bio21 InstituteThe University of MelbourneParkvilleVictoriaAustralia
| | - Joyce Mo
- Department of Biochemistry and Pharmacology, Bio21 Molecular Science and Biotechnology InstituteThe University of MelbourneMelbourneVictoriaAustralia
- Oral Health Cooperative Research Centre, Melbourne Dental School, Bio21 InstituteThe University of MelbourneParkvilleVictoriaAustralia
| | - Eric C. Reynolds
- Oral Health Cooperative Research Centre, Melbourne Dental School, Bio21 InstituteThe University of MelbourneParkvilleVictoriaAustralia
| | - Debnath Ghosal
- Department of Biochemistry and Pharmacology, Bio21 Molecular Science and Biotechnology InstituteThe University of MelbourneMelbourneVictoriaAustralia
- ARC Centre for Cryo‐electron Microscopy of Membrane Proteins, Bio21 Molecular Science and Biotechnology InstituteUniversity of MelbourneParkvilleVictoriaAustralia
| | - Paul D. Veith
- Oral Health Cooperative Research Centre, Melbourne Dental School, Bio21 InstituteThe University of MelbourneParkvilleVictoriaAustralia
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Brookes Z, Teoh L, Cieplik F, Kumar P. Mouthwash Effects on the Oral Microbiome: Are They Good, Bad, or Balanced? Int Dent J 2023; 73 Suppl 2:S74-S81. [PMID: 37867065 PMCID: PMC10690560 DOI: 10.1016/j.identj.2023.08.010] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2023] [Accepted: 08/21/2023] [Indexed: 10/24/2023] Open
Abstract
This narrative review describes the oral microbiome, and its role in oral health and disease, before considering the impact of commonly used over-the-counter (OTC) mouthwashes on oral bacteria, viruses, bacteriophages, and fungi that make up these microbial communities in different niches of the mouth. Whilst certain mouthwashes have proven antimicrobial actions and clinical effectiveness supported by robust evidence, this review reports more recent metagenomics evidence, suggesting that mouthwashes such as chlorhexidine may cause "dysbiosis," whereby certain species of bacteria are killed, leaving others, sometimes unwanted, to predominate. There is little known about the effects of mouthwashes on fungi and viruses in the context of the oral microbiome (virome) in vivo, despite evidence that they "kill" certain viral pathogens ex vivo. Evidence for mouthwashes, much like antibiotics, is also emerging with regards to antimicrobial resistance, and this should further be considered in the context of their widespread use by clinicians and patients. Therefore, considering the potential of currently available OTC mouthwashes to alter the oral microbiome, this article finally proposes that the ideal mouthwash, whilst combatting oral disease, should "balance" antimicrobial communities, especially those associated with health. Which antimicrobial mouthwash best fits this ideal remains uncertain.
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Affiliation(s)
- Zoë Brookes
- Peninsula Dental School, Plymouth University, Plymouth, UK.
| | - Leanne Teoh
- Melbourne Dental School, The University of Melbourne, Carlton, Victoria, Australia
| | - Fabian Cieplik
- Department of Conservative Dentistry and Periodontology, University Hospital Regensburg, Regensburg, Germany
| | - Purnima Kumar
- Department of Periodontics and Oral Medicine, School of Dentistry, University of Michigan, Ann Arbor, USA
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10
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Fu KL, Chiu MJ, Wara-Aswapati N, Yang CN, Chang LC, Guo YL, Ni YH, Chen YW. Oral microbiome and serological analyses on association of Alzheimer's disease and periodontitis. Oral Dis 2023; 29:3677-3687. [PMID: 35950713 DOI: 10.1111/odi.14348] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2022] [Revised: 07/15/2022] [Accepted: 08/05/2022] [Indexed: 11/27/2022]
Abstract
OBJECTIVE To investigate the association between Alzheimer's disease (AD) and periodontitis in the aspects of periodontal status, serological markers, and oral microbiome. MATERIALS AND METHODS Twenty AD and 20 healthy subjects were enrolled in this age- and gender-matched case-control study. Clinical periodontal parameters and serum biomarkers, including amyloid β42 (Aβ42 ), Tau, phosphorylated Tau (pTau), triglyceride, pro-inflammatory cytokines, and anti-Porphyromonas gingivalis lipopolysaccharide (LPS) antibody were examined. The saliva samples were analyzed for oral microbiome composition. RESULTS Alzheimer's disease patients with Clinical Dementia Rating (CDR) ≥1 exhibited significantly more clinical attachment loss (CAL) than those with lower CDR. The levels of serum Tau protein, hsCRP and anti-P. gingivalis LPS antibody were markedly elevated in the AD group compared with the control group. Serum pTau protein level was positively correlated with anti-P. gingivalis LPS antibody titer. Moreover, the increased abundances of Capnocytophaga sp ora clone DZ074, Eubacterium infirmum, Prevotella buccae, and Selenomonas artemidis were detected in the AD group. Interestingly, serum levels of Aβ42, pTau, and anti-P. gingivalis LPS antibody were strongly related to the gene upregulation in human pathogen septicemia. CONCLUSIONS Our study suggested the association of periodontal infection and oral microbiome with AD. Further large-scale studies with longitudinal follow-up are warranted.
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Affiliation(s)
- Kuan-Lun Fu
- Department of Dentistry, National Taiwan University Hospital and Graduate Institute of Clinical Dentistry, National Taiwan University, Taipei, Taiwan
| | - Ming-Jang Chiu
- Department of Neurology, National Taiwan University Hospital and College of Medicine, National Taiwan University, Taipei, Taiwan
| | - Nawarat Wara-Aswapati
- Department of Periodontology, Faculty of Dentistry, Khon Kaen University, Khon Kaen, Thailand
| | - Cheng-Ning Yang
- Department of Dentistry, National Taiwan University Hospital and Graduate Institute of Clinical Dentistry, National Taiwan University, Taipei, Taiwan
| | - Li-Chun Chang
- Department of Internal Medicine, National Taiwan University Hospital and Health Management Center, National Taiwan University Hospital, Taipei, Taiwan
| | - Yue Leon Guo
- Department of Environmental and Occupational Medicine, National Taiwan University College of Medicine, National Taiwan University Hospital, Taipei, Taiwan
| | - Yen-Hsuan Ni
- Department of Pediatrics, National Taiwan University Children's Hospital and College of Medicine, National Taiwan University, Taipei, Taiwan
| | - Yi-Wen Chen
- Department of Dentistry, National Taiwan University Hospital and Graduate Institute of Clinical Dentistry, National Taiwan University, Taipei, Taiwan
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11
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Hagenfeld D, Kleine Bardenhorst S, Matern J, Prior K, Harks I, Eickholz P, Lorenz K, Kim TS, Kocher T, Meyle J, Kaner D, Schlagenhauf U, Harmsen D, Ehmke B. Long-term changes in the subgingival microbiota in patients with stage III-IV periodontitis treated by mechanical therapy and adjunctive systemic antibiotics: A secondary analysis of a randomized controlled trial. J Clin Periodontol 2023; 50:1101-1112. [PMID: 37160709 DOI: 10.1111/jcpe.13824] [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: 08/16/2022] [Revised: 03/08/2023] [Accepted: 04/21/2023] [Indexed: 05/11/2023]
Abstract
AIM To explore whether adjunctive antibiotics can relevantly influence long-term microbiota changes in stage III-IV periodontitis patients. MATERIALS AND METHODS This is a secondary analysis of a randomized clinical trial on periodontal therapy with adjunctive 500 mg amoxicillin and 400 mg metronidazole or placebo thrice daily for 7 days. Subgingival plaque samples were taken before and 2, 8, 14 and 26 months after mechanical therapy. The V4-hypervariable region of the 16S rRNA gene was sequenced with Illumina MiSeq 250 base pair paired-end reads. Changes at the ribosomal sequence variant (RSV) level, diversity and subgingival-microbial dysbiosis index (SMDI) were explored with a negative binomial regression model and non-parametric tests. RESULTS Overall, 50.2% of all raw reads summed up to 72 RSVs (3.0%) that were generated from 163 stage III-IV periodontitis patients. Of those, 16 RSVs, including Porphyromonas gingivalis, Tannerella forsythia and Aggregatibacter actinomycetemcomitans, changed significantly over 26 months because of adjunctive systemic antibiotics. SMDI decreased significantly more in the antibiotic group at all timepoints, whereas the 2-month differences in alpha and beta diversity between groups were not significant at 8 and 14 months, respectively. CONCLUSIONS Mechanical periodontal therapy with adjunctive antibiotics induced a relevant and long-term sustainable change towards an oral microbiome more associated with oral health.
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Affiliation(s)
- Daniel Hagenfeld
- Department of Periodontology and Operative Dentistry, Muenster University Hospital, Münster, Germany
| | - Sven Kleine Bardenhorst
- Department of Periodontology and Operative Dentistry, Muenster University Hospital, Münster, Germany
- Department of Clinical Epidemiology, Institute of Epidemiology and Social Medicine, University of Münster, Münster, Germany
| | - Johannes Matern
- Department of Periodontology and Operative Dentistry, Muenster University Hospital, Münster, Germany
| | - Karola Prior
- Department of Periodontology and Operative Dentistry, Muenster University Hospital, Münster, Germany
| | - Inga Harks
- Department of Periodontology and Operative Dentistry, Muenster University Hospital, Münster, Germany
| | - Peter Eickholz
- Department of Periodontology, Center for Dentistry and Oral Medicine, Johann Wolfgang Goethe-University Frankfurt, Frankfurt am Main, Germany
| | - Katrin Lorenz
- Department of Periodontology, TU Dresden, Dresden, Germany
| | - Ti-Sun Kim
- Section of Periodontology, Department of Conservative Dentistry, Clinic for Oral, Dental and Maxillofacial Diseases, Heidelberg University Hospital, Heidelberg, Germany
| | - Thomas Kocher
- Department of Restorative Dentistry, Periodontology, Endodontology, and Preventive and Pediatric Dentistry, University Medicine Greifswald, Greifswald, Germany
| | - Jörg Meyle
- Department of Periodontology, University of Giessen, Giessen, Germany
| | - Doğan Kaner
- Department of Periodontology and Synoptic Dentistry, Charite-Universitätsmedizin Berlin, Berlin, Germany
- Department of Periodontology, Dental School, Faculty of Health, University of Witten/Herdecke, Witten, Germany
| | - Ulrich Schlagenhauf
- Department of Periodontology, University Hospital Würzburg, Würzburg, Germany
| | - Dag Harmsen
- Department of Periodontology and Operative Dentistry, Muenster University Hospital, Münster, Germany
| | - Benjamin Ehmke
- Department of Periodontology and Operative Dentistry, Muenster University Hospital, Münster, Germany
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Mazurel D, Carda-Diéguez M, Langenburg T, Žiemytė M, Johnston W, Martínez CP, Albalat F, Llena C, Al-Hebshi N, Culshaw S, Mira A, Rosier BT. Nitrate and a nitrate-reducing Rothia aeria strain as potential prebiotic or synbiotic treatments for periodontitis. NPJ Biofilms Microbiomes 2023; 9:40. [PMID: 37330520 PMCID: PMC10276839 DOI: 10.1038/s41522-023-00406-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2023] [Accepted: 06/05/2023] [Indexed: 06/19/2023] Open
Abstract
A few studies indicate that nitrate can reduce dysbiosis from a periodontitis point of view. However, these experiments were performed on samples from healthy individuals, and it is unknown if nitrate will be effective in periodontal patients, where the presence of nitrate-reducing bacteria is clearly reduced. The aim of this study was to test the effect of nitrate and a nitrate-reducing R. aeria (Ra9) on subgingival biofilms of patients with periodontitis. For this, subgingival plaque was incubated with 5 mM nitrate for 7 h (n = 20) or 50 mM nitrate for 12 h (n = 10), achieving a ~50% of nitrate reduction in each case. Additionally, Ra9 was combined with 5 mM nitrate (n = 11), increasing the nitrate reduced and nitrite produced (both p < 0.05). The addition of nitrate to periodontitis communities decreased biofilm mass (50 mM > 5 mM, both p < 0.05). Five millimolar nitrate, 50 mM nitrate and 5 mM nitrate + Ra9 led to 3, 28 and 20 significant changes in species abundance, respectively, which were mostly decreases in periodontitis-associated species. These changes led to a respective 15%, 63% (both p < 0.05) and 6% (not significant) decrease in the dysbiosis index. Using a 10-species biofilm model, decreases in periodontitis-associated species in the presence of nitrate were confirmed by qPCR (all p < 0.05). In conclusion, nitrate metabolism can reduce dysbiosis and biofilm growth of periodontitis communities. Five millimolar nitrate (which can be found in saliva after vegetable intake) was sufficient, while increasing this concentration to 50 mM (which could be achieved by topical applications such as a periodontal gel) increased the positive effects. Ra9 increased the nitrate metabolism of periodontitis communities and should be tested in vivo.
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Affiliation(s)
- Danuta Mazurel
- Genomics & Health Department, FISABIO Institute, Valencia, Spain
- Department of Preventive Dentistry, Academic Center for Dentistry Amsterdam (ACTA), University of Amsterdam and VU University Amsterdam, Amsterdam, Netherlands
| | | | | | - Miglė Žiemytė
- Genomics & Health Department, FISABIO Institute, Valencia, Spain
| | - William Johnston
- Department of Biological and Biomedical Sciences, Glasgow Caledonian University, Glasgow, UK
| | | | | | - Carmen Llena
- Department of Stomatology, University of Valencia, Valencia, Spain
| | - Nezar Al-Hebshi
- Oral Microbiome Research Laboratory, Kornberg School of Dentistry, Temple University, Philadelphia, PA, USA
| | - Shauna Culshaw
- Oral Sciences, Glasgow Dental Hospital and School, School of Medicine, Dentistry and Nursing, College of Medical, Veterinary and Life Sciences, University of Glasgow, Glasgow, UK
| | - Alex Mira
- Genomics & Health Department, FISABIO Institute, Valencia, Spain.
| | - Bob T Rosier
- Genomics & Health Department, FISABIO Institute, Valencia, Spain.
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13
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Madi M, Smith S, Alshehri S, Zakaria O, Almas K. Influence of Smoking on Periodontal and Implant Therapy: A Narrative Review. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2023; 20:5368. [PMID: 37047982 PMCID: PMC10094532 DOI: 10.3390/ijerph20075368] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/30/2023] [Revised: 03/15/2023] [Accepted: 03/28/2023] [Indexed: 06/19/2023]
Abstract
BACKGROUND smoking is considered the most modifiable risk factor for periodontal disease. OBJECTIVE the aim of this narrative review is to emphasize the effect of smoking on periodontal and implant therapy. METHODS The authors reviewed the literature reporting the clinical outcomes of smoking on periodontal surgical and nonsurgical treatment. The impact of smoking on implant therapy and sinus lifting procedures were also reviewed. RESULTS Periodontal and implant therapy outcomes are adversely affected by smoking. Smokers respond less favorably to periodontal therapy and periodontal flap procedures as compared to nonsmokers. Clinical outcomes for smokers are 50-75% worse than for nonsmokers. Studies reveal that smokers experience a significantly lower reduction in pocket depth compared to nonsmokers as well as less bone growth after treating infra-bony defects with guided tissue regeneration. The relative risk of implant failure is significantly higher in patients who smoke 20 cigarettes or more per day compared to nonsmokers. Additionally, smoking has also been shown to increase postoperative wound dehiscence and infection rates following sinus floor elevation. Longitudinal studies on smoke cessation have shown a reduction in bone loss and probing depths for periodontitis patients after cessation compared to those who smoke. CONCLUSION Smoking cessation can reduce probing depths and improve clinical attachment after nonsurgical periodontal therapy. There is insufficient evidence regarding the effect of smoking on peri-implantitis, as well as the loss of implants in the long-term.
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Affiliation(s)
- Marwa Madi
- Department of Preventive Dental Sciences, College of Dentistry, Imam Abdulrahman Bin Faisal University, P.O. Box 1982, Dammam 31441, Saudi Arabia
| | - Steph Smith
- Department of Preventive Dental Sciences, College of Dentistry, Imam Abdulrahman Bin Faisal University, P.O. Box 1982, Dammam 31441, Saudi Arabia
| | - Sami Alshehri
- Department of Biomedical Dental Sciences, College of Dentistry, Imam Abdulrahman Bin Faisal University, P.O. Box 1982, Dammam 31441, Saudi Arabia
| | - Osama Zakaria
- Department of Biomedical Dental Sciences, College of Dentistry, Imam Abdulrahman Bin Faisal University, P.O. Box 1982, Dammam 31441, Saudi Arabia
| | - Khalid Almas
- Department of Preventive Dental Sciences, College of Dentistry, Imam Abdulrahman Bin Faisal University, P.O. Box 1982, Dammam 31441, Saudi Arabia
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Maki KA, Ganesan SM, Meeks B, Farmer N, Kazmi N, Barb JJ, Joseph PV, Wallen GR. The role of the oral microbiome in smoking-related cardiovascular risk: a review of the literature exploring mechanisms and pathways. J Transl Med 2022; 20:584. [PMID: 36503487 PMCID: PMC9743777 DOI: 10.1186/s12967-022-03785-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2022] [Accepted: 11/21/2022] [Indexed: 12/14/2022] Open
Abstract
Cardiovascular disease is a leading cause of morbidity and mortality. Oral health is associated with smoking and cardiovascular outcomes, but there are gaps in knowledge of many mechanisms connecting smoking to cardiovascular risk. Therefore, the aim of this review is to synthesize literature on smoking and the oral microbiome, and smoking and cardiovascular risk/disease, respectively. A secondary aim is to identify common associations between the oral microbiome and cardiovascular risk/disease to smoking, respectively, to identify potential shared oral microbiome-associated mechanisms. We identified several oral bacteria across varying studies that were associated with smoking. Atopobium, Gemella, Megasphaera, Mycoplasma, Porphyromonas, Prevotella, Rothia, Treponema, and Veillonella were increased, while Bergeyella, Haemophilus, Lautropia, and Neisseria were decreased in the oral microbiome of smokers versus non-smokers. Several bacteria that were increased in the oral microbiome of smokers were also positively associated with cardiovascular outcomes including Porphyromonas, Prevotella, Treponema, and Veillonella. We review possible mechanisms that may link the oral microbiome to smoking and cardiovascular risk including inflammation, modulation of amino acids and lipids, and nitric oxide modulation. Our hope is this review will inform future research targeting the microbiome and smoking-related cardiovascular disease so possible microbial targets for cardiovascular risk reduction can be identified.
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Affiliation(s)
- Katherine A. Maki
- grid.410305.30000 0001 2194 5650Translational Biobehavioral and Health Disparities Branch, National Institutes of Health, Clinical Center, 10 Center Drive, Building 10, Bethesda, MD 20814 USA
| | - Sukirth M. Ganesan
- grid.214572.70000 0004 1936 8294Department of Periodontics, The University of Iowa College of Dentistry and Dental Clinics, 801 Newton Rd., Iowa City, IA 52242 USA
| | - Brianna Meeks
- grid.411024.20000 0001 2175 4264University of Maryland, School of Social Work, Baltimore, MD USA
| | - Nicole Farmer
- grid.410305.30000 0001 2194 5650Translational Biobehavioral and Health Disparities Branch, National Institutes of Health, Clinical Center, 10 Center Drive, Building 10, Bethesda, MD 20814 USA
| | - Narjis Kazmi
- grid.410305.30000 0001 2194 5650Translational Biobehavioral and Health Disparities Branch, National Institutes of Health, Clinical Center, 10 Center Drive, Building 10, Bethesda, MD 20814 USA
| | - Jennifer J. Barb
- grid.410305.30000 0001 2194 5650Translational Biobehavioral and Health Disparities Branch, National Institutes of Health, Clinical Center, 10 Center Drive, Building 10, Bethesda, MD 20814 USA
| | - Paule V. Joseph
- grid.420085.b0000 0004 0481 4802National Institute on Alcohol Abuse and Alcoholism, National Institutes of Health, Bethesda, MD USA ,grid.280738.60000 0001 0035 9863National Institute of Nursing Research, National Institutes of Health, Bethesda, MD USA
| | - Gwenyth R. Wallen
- grid.410305.30000 0001 2194 5650Translational Biobehavioral and Health Disparities Branch, National Institutes of Health, Clinical Center, 10 Center Drive, Building 10, Bethesda, MD 20814 USA
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15
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de Arruda JAA, Corrêa JD, Singh Y, Oliveira SR, Machado CC, Schneider AH, Medeiros JD, Fernandes GR, Macari S, Barrioni BR, Santos MDS, Duffles LF, Nakaya HTI, Fukada SY, Graves DT, Cunha FQ, Silva TA. Methotrexate promotes recovery of arthritis-induced alveolar bone loss and modifies the composition of the oral-gut microbiota. Anaerobe 2022; 75:102577. [PMID: 35490916 PMCID: PMC10782845 DOI: 10.1016/j.anaerobe.2022.102577] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2022] [Revised: 03/22/2022] [Accepted: 04/24/2022] [Indexed: 01/04/2023]
Abstract
OBJECTIVES The impact of rheumatoid arthritis (RA) on the shaping of the oral and gut microbiome raises the question of whether and how RA treatment modifies microbial communities. We examined changes in the oral and gut microbiota in a mouse model of antigen-induced arthritis (AIA) treated or not with methotrexate (MTX). METHODS Maxillae and stools were evaluated by the MiSeq platform of the V4 region of the 16S rRNA gene. Alveolar bone parameters were analysed by micro-computed tomography. Moreover, arthritis-induced changes in hyperalgesia and oedema were assessed, along with the impact on periodontal bone health. RESULTS Microbial communities in MTX-treated AIA mice revealed distinct clusters compared to the control and AIA groups. Overall, MTX impacted the richness and variability of microorganisms in the oral-gut axis microbiome at the phylum level. Regarding the oral microbiome, while in the control group the most dominant phylum was Firmicutes, in the AIA group there was a shift towards the predominance of Campilobacteriota and Bacteroidetes associated with the disease. MTX treatment led to greater dominance of the health-associated phylum Proteobacteria. In the gut microbiome, AIA induction resulted in increased abundance of the Verrucomicrobiota phylum, and MTX treatment restored its levels compared to control. Importantly, the MTX-treated AIA animals had significantly less periodontal bone loss, as well as decreased hyperalgesia and joint oedema compared to the AIA animals. CONCLUSION Data suggest the benefit of MTX treatment in protecting alveolar bone, in addition to providing new insights on the drug-microbiome interaction in the course of RA.
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Affiliation(s)
- José Alcides Almeida de Arruda
- Department of Oral Surgery, Pathology and Clinical Dentistry, School of Dentistry, Federal University of Minas Gerais, Belo Horizonte, MG, Brazil
| | - Jôice Dias Corrêa
- Department of Dentistry, Pontifical Catholic University, Belo Horizonte, MG, Brazil
| | - Youvika Singh
- Department of Clinical and Toxicological Analysis, Faculty of Pharmaceutical Sciences, University of São Paulo, São Paulo, SP, Brazil
| | - Sicília Rezende Oliveira
- Department of Oral Surgery, Pathology and Clinical Dentistry, School of Dentistry, Federal University of Minas Gerais, Belo Horizonte, MG, Brazil
| | - Caio Cavalcante Machado
- Department of Pharmacology, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, SP, Brazil
| | - Ayda Henriques Schneider
- Department of Pharmacology, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, SP, Brazil
| | - Julliane Dutra Medeiros
- Faculty of Biological and Agricultural Sciences, Mato Grosso State University, Alta Floresta, MT, Brazil
| | - Gabriel R Fernandes
- Oswaldo Cruz Fundation, René Rachou Research Center, Belo Horizonte, MG, Brazil
| | - Soraia Macari
- Department of Restorative Dentistry, School of Dentistry, Federal University of Minas Gerais, Belo Horizonte, MG, Brazil
| | - Breno Rocha Barrioni
- Department of Metallurgical and Materials Engineering, Faculty of Engineering, Federal University of Minas Gerais, Belo Horizonte, MG, Brazil
| | - Mariana de Souza Santos
- Department of Restorative Dentistry, School of Dentistry, Federal University of Minas Gerais, Belo Horizonte, MG, Brazil
| | - Letícia Fernanda Duffles
- Department of BioMolecular Sciences, School of Pharmacological Science, University of São Paulo, Ribeirão Preto, SP, Brazil
| | - Helder Takashi Imoto Nakaya
- Department of Clinical and Toxicological Analysis, Faculty of Pharmaceutical Sciences, University of São Paulo, São Paulo, SP, Brazil
| | - Sandra Yasuyo Fukada
- Department of BioMolecular Sciences, School of Pharmacological Science, University of São Paulo, Ribeirão Preto, SP, Brazil
| | - Dana T Graves
- Department of Periodontics, School of Dental Medicine, University of Pennsylvania, Philadelphia, PA, United States
| | - Fernando Queiroz Cunha
- Department of Pharmacology, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, SP, Brazil.
| | - Tarcília Aparecida Silva
- Department of Oral Surgery, Pathology and Clinical Dentistry, School of Dentistry, Federal University of Minas Gerais, Belo Horizonte, MG, Brazil.
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Mechanistic Effects of E-Liquids on Biofilm Formation and Growth of Oral Commensal Streptococcal Communities: Effect of Flavoring Agents. Dent J (Basel) 2022; 10:dj10050085. [PMID: 35621538 PMCID: PMC9139693 DOI: 10.3390/dj10050085] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2022] [Revised: 04/21/2022] [Accepted: 05/11/2022] [Indexed: 02/04/2023] Open
Abstract
Background: Vaping has become a global health concern. As research continues, more studies are beginning to question the relative safety of E-liquid flavoring additives. The oral cavity is the first site of exposure to E-liquid aerosol, making it critical for investigation. Because of the importance of commensal bacterial biofilms for oral health, we sought to explore the effects of E-liquids ± flavors on the formation and growth of single- and multi-species biofilms and to investigate the mechanism of inhibition. Methods: Quantitative and confocal biofilm analysis, death curves, and colony-forming units (CFU) were evaluated with flavorless and flavored (tobacco, menthol, cinnamon, strawberry, blueberry) E-liquids using four strains of oral commensal bacteria (Streptococcus gordonii, Streptococcus intermedius, Streptococcus mitis, and Streptococcus oralis). Results: All flavoring agents show a dose-dependent inhibition in the growth of single-species and multi-species biofilms. Furthermore, CFUs, death curves, and light microscopy show that flavoring agents have a bactericidal mode of inhibition on the growth of these oral streptococci. Conclusions: These results show that flavored, rather than unflavored, E-liquids are more detrimental to biofilm formation and growth of oral commensal bacteria. Consequently, E-liquid flavorings agents could pose risks to the oral microenvironment, and by extension, to systemic health.
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17
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Proteomic analysis of the periodontal pathogen Prevotella intermedia secretomes in biofilm and planktonic lifestyles. Sci Rep 2022; 12:5636. [PMID: 35379855 PMCID: PMC8980031 DOI: 10.1038/s41598-022-09085-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2021] [Accepted: 03/04/2022] [Indexed: 11/10/2022] Open
Abstract
Prevotella intermedia is an important species associated with periodontitis. Despite the remarkable clinical significance, little is known about the molecular basis for its virulence. The aim of this study was to characterize the secretome of P. intermedia in biofilm and planktonic life mode. The biofilm secretome showed 109 proteins while the planktonic secretome showed 136 proteins. The biofilm and the planktonic secretomes contained 17 and 33 signal-peptide bearing proteins, 13 and 18 lipoproteins, respectively. Superoxide reductase, sensor histidine kinase, C40 family peptidase, elongation factor Tu, threonine synthase etc. were unique to biofilm. Of the ~ 30 proteins with predicted virulence potential from biofilm and planktonic secretomes, only 6 were common between the two groups, implying large differences between biofilm and planktonic modes of P. intermedia. From Gene Ontology biofilm secretome displayed a markedly higher percent proteins compared to planktonic secretome in terms of cellular amino acid metabolic process, nitrogen compound metabolic process etc. Inflammatory cytokine profile analysis revealed that only the biofilm secretome, not the planktonic one, induced important cytokines such as MIP-1α/MIP-1β, IL-1β, and IL-8. In conclusion, the revealed differences in the protein profiles of P. intermedia biofilm and planktonic secretomes may trigger further questions about molecular mechanisms how this species exerts its virulence potential in the oral cavity.
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18
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Rosier BT, Takahashi N, Zaura E, Krom BP, MartÍnez-Espinosa RM, van Breda SGJ, Marsh PD, Mira A. The Importance of Nitrate Reduction for Oral Health. J Dent Res 2022; 101:887-897. [PMID: 35196931 DOI: 10.1177/00220345221080982] [Citation(s) in RCA: 40] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Salivary glands concentrate plasma nitrate into saliva, leading to high nitrate concentrations that can reach the millimolar range after a nitrate-rich vegetable meal. Whereas human cells cannot reduce nitrate to nitrite effectively, certain oral bacteria can. This leads to an increase in systemic nitrite that can improve conditions such as hypertension and diabetes through nitric oxide availability. Apart from systemic benefits, it has been proposed that microbial nitrate reduction can also promote oral health. In this review, we discuss evidence associating dietary nitrate with oral health. Oral bacteria can reduce nitrite to nitric oxide, a free radical with antimicrobial properties capable of inhibiting sensitive species such as anaerobes involved in periodontal diseases. Nitrate has also been shown to increase resilience against salivary acidification in vivo and in vitro, thus preventing caries development. One potential mechanism is proton consumption during denitrification and/or bacterial reduction of nitrite to ammonium. Additionally, lactic acid (organic acid involved in oral acidification) and hydrogen sulfide (volatile compound involved in halitosis) can act as electron donors for these processes. The nitrate-reducing bacteria Rothia and Neisseria are consistently found at higher levels in individuals free of oral disease (vs. individuals with caries, periodontitis, and/or halitosis) and increase when nitrate is consumed in clinical studies. Preliminary in vitro and clinical evidence show that bacteria normally associated with disease, such as Veillonella (caries) and Prevotella (periodontal diseases and halitosis), decrease in the presence of nitrate. We propose nitrate as an ecologic factor stimulating eubiosis (i.e., an increase in health-associated species and functions). Finally, we discuss the preventive and therapeutic potential, as well as safety issues, related to the use of nitrate. In vivo evidence is limited; therefore, robust clinical studies are required to confirm the potential benefits of nitrate reduction on oral health.
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Affiliation(s)
- B T Rosier
- Department of Health and Genomics, FISABIO Foundation, Valencia, Spain
| | - N Takahashi
- Department of Ecological Dentistry, Graduate School of Dentistry, Tohoku University, Sendai, Japan
| | - E Zaura
- Department of Preventive Dentistry, Academic Centre for Dentistry Amsterdam, University of Amsterdam and Vrije Universiteit Amsterdam, Amsterdam, the Netherlands
| | - B P Krom
- Department of Preventive Dentistry, Academic Centre for Dentistry Amsterdam, University of Amsterdam and Vrije Universiteit Amsterdam, Amsterdam, the Netherlands
| | - R M MartÍnez-Espinosa
- Agrochemistry and Biochemistry Department, Faculty of Sciences, University of Alicante, Alicante, Spain
| | - S G J van Breda
- Department of Toxicogenomics, GROW-School for Oncology and Developmental Biology, Maastricht University Medical Center, Maastricht, the Netherlands
| | - P D Marsh
- Department of Oral Biology, School of Dentistry, University of Leeds, Leeds, UK
| | - A Mira
- Department of Health and Genomics, FISABIO Foundation, Valencia, Spain.,CIBER Institute of Epidemiology and Public Health, Madrid, Spain
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Kelley ST, Liu W, Quintana PJ, Hoh E, Dodder NG, Mahabee-Gittens EM, Padilla S, Ogden S, Frenzel S, Sisk-Hackworth L, Matt GE. Altered microbiomes in thirdhand smoke-exposed children and their home environments. Pediatr Res 2021; 90:1153-1160. [PMID: 33654287 PMCID: PMC8410873 DOI: 10.1038/s41390-021-01400-1] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/26/2020] [Revised: 12/29/2020] [Accepted: 01/06/2021] [Indexed: 12/30/2022]
Abstract
INTRODUCTION Tobacco smoke contains numerous toxic chemicals that accumulate in indoor environments creating thirdhand smoke (THS). We investigated if THS-polluted homes differed in children's human and built-environment microbiomes as compared to THS-free homes. METHODS Participants were n = 19 THS-exposed children and n = 10 unexposed children (≤5 years) and their caregivers. Environmental and biological samples were analyzed for THS pollutants and exposure. Swab samples were collected from the built-environment (floor, table, armrest, bed frame) and child (finger, nose, mouth, and ear canal), and 16S ribosomal RNA genes were analyzed for bacterial taxa using high-throughput DNA sequencing. RESULTS Phylogenetic α-diversity was significantly higher for the built-environment microbiomes in THS-polluted homes compared to THS-free homes (p < 0.014). Log2-fold comparison found differences between THS-polluted and THS-free homes for specific genera in samples from the built-environment (e.g., Acinetobacter, Bradyrhizobium, Corynebacterium, Gemella, Neisseria, Staphylococcus, Streptococcus, and Veillonella) and in samples from children (esp. Corynebacterium, Gemella, Lautropia, Neisseria, Rothia, Staphylococcus, and Veillonella). CONCLUSION When exposed to THS, indoor and children microbiomes are altered in an environment-specific manner. Changes are similar to those reported in previous studies for smokers and secondhand smoke-exposed persons. THS-induced changes in child and built-environmental microbiomes may play a role in clinical outcomes in children. IMPACT Despite smoking bans, children can be exposed to tobacco smoke residue (i.e., thirdhand smoke) that lingers on surfaces and in settled house dust. Thirdhand smoke exposure is associated with changes in the microbiomes of the home environment and of the children living in these homes. Thirdhand smoke is associated with increased phylogenetic diversity of the home environment and changes in the abundances of several genera of the child microbiome known to be affected by active smoking and secondhand smoke (e.g., Corynebacterium, Staphylococcus, Streptococcus). Thirdhand smoke exposure by itself may induce alterations in the microbiome that play a role in childhood pathologies.
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Affiliation(s)
| | - William Liu
- San Diego State University, San Diego CA, USA
| | | | - Eunha Hoh
- San Diego State University, San Diego CA, USA
| | | | - E. Melinda Mahabee-Gittens
- Cincinnati Children’s Hospital Medical Center, University of Cincinnati College of Medicine, Cincinnati, OH, U.S.A
| | | | - Shawn Ogden
- San Diego State University, San Diego CA, USA
| | - Sia Frenzel
- San Diego State University, San Diego CA, USA
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Kouanda B, Sattar Z, Geraghty P. Periodontal Diseases: Major Exacerbators of Pulmonary Diseases? Pulm Med 2021; 2021:4712406. [PMID: 34765263 PMCID: PMC8577952 DOI: 10.1155/2021/4712406] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2021] [Accepted: 10/16/2021] [Indexed: 12/13/2022] Open
Abstract
Periodontal diseases are a range of polymicrobial infectious disorders, such as gingivitis and periodontitis, which affect tooth-supporting tissues and are linked to playing a role in the exacerbation of several pulmonary diseases. Pulmonary diseases, such as pneumonia, chronic obstructive pulmonary disease (COPD), asthma, tuberculosis, COVID-19, and bronchiectasis, significantly contribute to poor quality of life and mortality. The association between periodontal disease and pulmonary outcomes is an important topic and requires further attention. Numerous resident microorganisms coexist in the oral cavity and lungs. However, changes in the normal microflora due to oral disease, old age, lifestyle habits, or dental intervention may contribute to altered aspiration of oral periodontopathic bacteria into the lungs and changing inflammatory responses. Equally, periodontal diseases are associated with the longitudinal decline in spirometry lung volume. Several studies suggest a possible beneficial effect of periodontal therapy in improving lung function with a decreased frequency of exacerbations and reduced risk of adverse respiratory events and morbidity. Here, we review the current literature outlining the link between the oral cavity and pulmonary outcomes and focus on the microflora of the oral cavity, environmental and genetic factors, and preexisting conditions that can impact oral and pulmonary outcomes.
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Affiliation(s)
- Bakey Kouanda
- Department of Medicine, State University of New York Downstate Health Sciences University, 450 Clarkson Avenue, Brooklyn, NY 11203, USA
| | - Zeeshan Sattar
- Department of Medicine, State University of New York Downstate Health Sciences University, 450 Clarkson Avenue, Brooklyn, NY 11203, USA
| | - Patrick Geraghty
- Department of Medicine, State University of New York Downstate Health Sciences University, 450 Clarkson Avenue, Brooklyn, NY 11203, USA
- Department of Cell Biology, State University of New York Downstate Health Sciences University, 450 Clarkson Avenue, Brooklyn, NY 11203, USA
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21
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Albaghdadi SZ, Altaher JB, Drobiova H, Bhardwaj RG, Karched M. In vitro Characterization of Biofilm Formation in Prevotella Species. FRONTIERS IN ORAL HEALTH 2021; 2:724194. [PMID: 35048047 PMCID: PMC8757683 DOI: 10.3389/froh.2021.724194] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2021] [Accepted: 08/23/2021] [Indexed: 12/28/2022] Open
Abstract
Background: Periodontitis, a chronic inflammatory oral infection is the outcome of disturbances in the homeostasis of the oral biofilm microbiota. A number of studies have found the occurrence of Prevotella species in elevated levels in periodontitis compared to healthy subjects. Even though different aspects of Prevotella as part of oral biofilm have been studied, in vitro biofilms formed by these species have not been characterized systematically. The objective of this study was to characterize biofilms formed by several Prevotella species and further to assess biofilm inhibition and detachment of preformed biofilms. Methods: Biofilms were grown in 24-well plates containing brucella broth in anaerobic conditions for 3 days, and were quantified using crystal violet staining. Images of SYTO 9 Green fluorescent stained biofilms were captured using confocal microscopy. Biofilm inhibition and detachment by proteinase and DNase I was tested. The biochemical characterization included quantification of proteins and DNA in the biofilms and biofilm-supernatants. Results: Prevotella loescheii, Prevotella oralis and Prevotella nigrescens showed highest biofilm formation. P. nigrescens formed significantly higher amounts of biofilms than P. loescheii (P = 0.005) and P. oralis (P = 0.0013). Inhibition of biofilm formation was significant only in the case of P. oralis when treated with proteinase (P = 0.037), whereas with DNase I treatment, the inhibition was not significant (P = 0.531). Overall, proteinase was more effective in biofilm detachment than DNase I. Protein and DNA content were higher in biofilm than the supernatant with the highest amounts found in P. nigrescens biofilm and supernatants. P. oralis biofilms appeared to secrete large amounts of proteins extracellularly into the biofilm-supernatants. Conclusion: Significant differences among Prevotella species to form biofilms may imply their variable abilities to get integrated into oral biofilm communities. Of the species that were able to grow as biofilms, DNase I and proteinase inhibited the biofilm growth or were able to cause biofilm detachment.
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Affiliation(s)
| | | | | | | | - Maribasappa Karched
- Oral Microbiology Research Laboratory, Department of Bioclinical Sciences, Faculty of Dentistry, Health Sciences Center, Kuwait University, Jabriya, Kuwait
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22
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Gopinath D, Wie CC, Banerjee M, Thangavelu L, Kumar R P, Nallaswamy D, Botelho MG, Johnson NW. Compositional profile of mucosal bacteriome of smokers and smokeless tobacco users. Clin Oral Investig 2021; 26:1647-1656. [PMID: 34436669 DOI: 10.1007/s00784-021-04137-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2021] [Accepted: 08/10/2021] [Indexed: 02/07/2023]
Abstract
INTRODUCTION Smoked, and especially smokeless, tobacco are major causes of oral cancer globally. Here, we examine the oral bacteriome of smokers and of smokeless tobacco users, in comparison to healthy controls, using 16S rRNA gene sequencing. METHODS Oral swab samples were collected from smokers, smokeless tobacco users, and healthy controls (n = 44). Microbial DNA was extracted and the 16S rRNA gene profiled using the Illumina MiSeq platform. Sequencing reads were processed using DADA2, and taxonomical classification was performed using the phylogenetic placement method. Differentially abundant taxa were identified using DESeq2, while functional metagenomes based on KEGG orthology abundance were inferred using LIMMA. RESULTS A significantly higher microbial diversity was observed in smokeless tobacco users and smokers relative to controls (P < 0.05). Compositional differences in microbial communities were observed in all comparisons with healthy controls (PERMANOVA P < 0.05) but not between smokers and smokeless tobacco users. Levels of Fusobacterium spp., Saccharibacterium spp., and members of Shuttleworthia were elevated in smokers when compared to controls (BH adj P < 0.01). In addition, the relative abundance of three bacterial taxa belonging to genera Fusobacterium spp., Catonella, and Fretibacterium spp. was significantly increased in smokeless tobacco users relative to controls (BH adj P < 0.01). Major functional pathways significantly increased in smokeless tobacco users relative to both controls, and smokers were similar and involved amino acid metabolism including glutamate and aspartate biosynthesis and degradation (log FC > 1.5; BH adj P < 0.01). CONCLUSIONS A distinct taxonomic and functional profile of oral microbiome in smokers and smokeless tobacco users as compared to healthy controls implicates a significant role of microbes and their metabolites in diseases associated with tobacco use including oral cancer. CLINICAL RELEVANCE Future efforts in preventive, diagnostic, curative, and prognostic strategies for diseases associated with tobacco use in smokers and smokeless tobacco users could incorporate the oral microbiome.
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Affiliation(s)
- Divya Gopinath
- Faculty of Dentistry, University of Hong Kong, Prince Philip Dental Hospital, Street 34 Hospital Rd, Sai Ying Pun, Hong Kong, SAR, China
- Clinical Oral Health Sciences, School of Dentistry, International Medical University, Kuala , Lumpur, Malaysia
| | - Chong Chun Wie
- School of Pharmacy, Monash University Malaysia, Subang Jaya, Malaysia
| | - Moinak Banerjee
- Human Molecular Genetics Lab, Rajiv Gandhi Centre for Biotechnology, Trivandrum, India
| | - Lakshmi Thangavelu
- Saveetha Dental College and Hospital, Saveetha University, Chennai, India
| | - Pradeep Kumar R
- Saveetha Dental College and Hospital, Saveetha University, Chennai, India
| | - Deepak Nallaswamy
- Saveetha Dental College and Hospital, Saveetha University, Chennai, India
| | - Michael George Botelho
- Faculty of Dentistry, University of Hong Kong, Prince Philip Dental Hospital, Street 34 Hospital Rd, Sai Ying Pun, Hong Kong, SAR, China.
| | - Newell W Johnson
- Faculty of Dentistry, University of Hong Kong, Prince Philip Dental Hospital, Street 34 Hospital Rd, Sai Ying Pun, Hong Kong, SAR, China.
- Menzies Health Institute Queensland and School of Dentistry and Oral Health, Griffith University, Southport, QLD, Australia.
- Faculty of Dentistry, Oral and Craniofacial Sciences, King's College London, London, UK.
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23
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Kumar PS. Microbial dysbiosis: The root cause of periodontal disease. J Periodontol 2021; 92:1079-1087. [PMID: 34152022 DOI: 10.1002/jper.21-0245] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2021] [Revised: 06/16/2021] [Accepted: 06/16/2021] [Indexed: 02/06/2023]
Affiliation(s)
- Purnima S Kumar
- Division of Periodontology, College of Dentistry, The Ohio State University, Columbus, OH, USA
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24
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Kamer AR, Pushalkar S, Gulivindala D, Butler T, Li Y, Annam KRC, Glodzik L, Ballman KV, Corby PM, Blennow K, Zetterberg H, Saxena D, de Leon MJ. Periodontal dysbiosis associates with reduced CSF Aβ42 in cognitively normal elderly. ALZHEIMER'S & DEMENTIA (AMSTERDAM, NETHERLANDS) 2021; 13:e12172. [PMID: 33869725 PMCID: PMC8040436 DOI: 10.1002/dad2.12172] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/23/2020] [Revised: 02/07/2021] [Accepted: 02/08/2021] [Indexed: 12/30/2022]
Abstract
INTRODUCTION Periodontal disease is a chronic, inflammatory bacterial dysbiosis that is associated with both Alzheimer's disease (AD) and Down syndrome. METHODS A total of 48 elderly cognitively normal subjects were evaluated for differences in subgingival periodontal bacteria (assayed by 16S rRNA sequencing) between cerebrospinal fluid (CSF) biomarker groups of amyloid and neurofibrillary pathology. A dysbiotic index (DI) was defined at the genus level as the abundance ratio of known periodontal bacteria to healthy bacteria. Analysis of variance/analysis of covariance (ANOVA/ANCOVA), linear discriminant effect-size analyses (LEfSe) were used to determine the bacterial genera and species differences between the CSF biomarker groups. RESULTS At genera and species levels, higher subgingival periodontal dysbiosis was associated with reduced CSF amyloid beta (Aβ)42 (P = 0.02 and 0.01) but not with P-tau. DISCUSSION We show a selective relationship between periodontal disease bacterial dysbiosis and CSF biomarkers of amyloidosis, but not for tau. Further modeling is needed to establish the direct link between oral bacteria and Aβ.
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Affiliation(s)
- Angela R. Kamer
- Department of Periodontology and Implant DentistryCollege of DentistryNew York UniversityNew YorkUSA
| | - Smruti Pushalkar
- Department of Molecular PathobiologyCollege of DentistryNew York UniversityNew YorkUSA
| | - Deepthi Gulivindala
- Department of Periodontology and Implant DentistryCollege of DentistryNew York UniversityNew YorkUSA
| | - Tracy Butler
- Department of RadiologyWeill Medical CenterBrain Health Imaging Institute Cornell UniversityNew YorkUSA
| | - Yi Li
- Department of RadiologyWeill Medical CenterBrain Health Imaging Institute Cornell UniversityNew YorkUSA
| | | | - Lidia Glodzik
- Department of RadiologyWeill Medical CenterBrain Health Imaging Institute Cornell UniversityNew YorkUSA
| | - Karla V. Ballman
- Division of BiostatisticsDepartment of Population Health SciencesWeill Medical CenterWeill Cornell MedicineNew YorkUSA
| | - Patricia M. Corby
- Department of Oral MedicineSchool of Dental MedicineUniversity of PennsylvaniaPhiladelphiaPennsylvaniaUSA
| | - Kaj Blennow
- Department of Psychiatry and NeurochemistryInstitute of Neuroscience and Physiologythe Sahlgrenska Academy at the University of GothenburgMölndalSweden
- Clinical Neurochemistry LaboratorySahlgrenska University HospitalMölndalSweden
| | - Henrik Zetterberg
- Department of Psychiatry and NeurochemistryInstitute of Neuroscience and Physiologythe Sahlgrenska Academy at the University of GothenburgMölndalSweden
- Clinical Neurochemistry LaboratorySahlgrenska University HospitalMölndalSweden
- Department of Neurodegenerative DiseaseUCL Institute of NeurologyLondonUK
- UK Dementia Research Institute at UCLLondonUK
| | - Deepak Saxena
- Department of Molecular PathobiologyCollege of DentistryNew York UniversityNew YorkUSA
| | - Mony J. de Leon
- Department of RadiologyWeill Medical CenterBrain Health Imaging Institute Cornell UniversityNew YorkUSA
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25
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Hajishengallis G, Lamont RJ. Polymicrobial communities in periodontal disease: Their quasi-organismal nature and dialogue with the host. Periodontol 2000 2021; 86:210-230. [PMID: 33690950 DOI: 10.1111/prd.12371] [Citation(s) in RCA: 125] [Impact Index Per Article: 41.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2020] [Revised: 03/05/2020] [Accepted: 03/28/2020] [Indexed: 12/11/2022]
Abstract
In health, indigenous polymicrobial communities at mucosal surfaces maintain an ecological balance via both inter-microbial and host-microbial interactions that promote their own and the host's fitness, while preventing invasion by exogenous pathogens. However, genetic and acquired destabilizing factors (including immune deficiencies, immunoregulatory defects, smoking, diet, obesity, diabetes and other systemic diseases, and aging) may disrupt this homeostatic balance, leading to selective outgrowth of species with the potential for destructive inflammation. This process, known as dysbiosis, underlies the development of periodontitis in susceptible hosts. The pathogenic process is not linear but involves a positive-feedback loop between dysbiosis and the host inflammatory response. The dysbiotic community is essentially a quasi-organismal entity, where constituent organisms communicate via sophisticated physical and chemical signals and display functional specialization (eg, accessory pathogens, keystone pathogens, pathobionts), which enables polymicrobial synergy and dictates the community's pathogenic potential or nososymbiocity. In this review, we discuss early and recent studies in support of the polymicrobial synergy and dysbiosis model of periodontal disease pathogenesis. According to this concept, disease is not caused by individual "causative pathogens" but rather by reciprocally reinforced interactions between physically and metabolically integrated polymicrobial communities and a dysregulated host inflammatory response.
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Affiliation(s)
- George Hajishengallis
- Department of Basic and Translational Sciences, Penn Dental Medicine, University of Pennsylvania, Philadelphia, USA
| | - Richard J Lamont
- Department of Oral Immunology and Infectious Diseases, School of Dentistry, University of Louisville, Louisville, Kentucky, USA
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26
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Zaura E, Pappalardo VY, Buijs MJ, Volgenant CMC, Brandt BW. Optimizing the quality of clinical studies on oral microbiome: A practical guide for planning, performing, and reporting. Periodontol 2000 2021; 85:210-236. [PMID: 33226702 PMCID: PMC7756869 DOI: 10.1111/prd.12359] [Citation(s) in RCA: 53] [Impact Index Per Article: 17.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
With this review, we aim to increase the quality standards for clinical studies with microbiome as an output parameter. We critically address the existing body of evidence for good quality practices in oral microbiome studies based on 16S rRNA gene amplicon sequencing. First, we discuss the usefulness of microbiome profile analyses. Is a microbiome study actually the best approach for answering the research question? This is followed by addressing the criteria for the most appropriate study design, sample size, and the necessary data (study metadata) that should be collected. Next, we evaluate the available evidence for best practices in sample collection, transport, storage, and DNA isolation. Finally, an overview of possible sequencing options (eg, 16S rRNA gene hypervariable regions, sequencing platforms), processing and data interpretation approaches, as well as requirements for meaningful data storage, sharing, and reporting are provided.
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Affiliation(s)
- Egija Zaura
- Department of Preventive DentistryAcademic Centre for Dentistry Amsterdam (ACTA)Vrije Universiteit Amsterdam and University of AmsterdamAmsterdamthe Netherlands
| | - Vincent Y. Pappalardo
- Department of Preventive DentistryAcademic Centre for Dentistry Amsterdam (ACTA)Vrije Universiteit Amsterdam and University of AmsterdamAmsterdamthe Netherlands
| | - Mark J. Buijs
- Department of Preventive DentistryAcademic Centre for Dentistry Amsterdam (ACTA)Vrije Universiteit Amsterdam and University of AmsterdamAmsterdamthe Netherlands
| | - Catherine M. C. Volgenant
- Department of Preventive DentistryAcademic Centre for Dentistry Amsterdam (ACTA)Vrije Universiteit Amsterdam and University of AmsterdamAmsterdamthe Netherlands
| | - Bernd W. Brandt
- Department of Preventive DentistryAcademic Centre for Dentistry Amsterdam (ACTA)Vrije Universiteit Amsterdam and University of AmsterdamAmsterdamthe Netherlands
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27
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Manoil D, Courvoisier DS, Gilbert B, Möller B, Walker UA, Muehlenen IV, Rubbert-Roth A, Finckh A, Bostanci N. Associations between serum antibodies to periodontal pathogens and preclinical phases of rheumatoid arthritis. Rheumatology (Oxford) 2021; 60:4755-4764. [PMID: 33512428 DOI: 10.1093/rheumatology/keab097] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2020] [Accepted: 01/17/2021] [Indexed: 11/13/2022] Open
Abstract
OBJECTIVES To examine whether serum antibodies against selected periodontal pathogens are associated with early symptoms of RA development in healthy individuals at risk of developing the disease. METHODS Within an ongoing study cohort of first-degree relatives of patients with RA (RA-FDRs), we selected four groups corresponding to specific preclinical phases of RA development (n = 201). (i) RA-FDR controls without signs and symptoms of arthritis nor RA-related autoimmunity (n = 51); (ii) RA-FDRs with RA-related autoimmunity (n = 51); (iii) RA-FDRs with inflammatory arthralgias without clinical arthritis (n = 51); and (iv) RA-FDRs who have presented at least one swollen joint ('unclassified arthritis') (n = 48). Groups were matched for smoking, age, sex and shared epitope status. The primary outcome was IgG serum levels against five selected periodontal pathogens and one commensal oral species assessed using validated-in-house ELISA assays. Associations between IgG measurements and preclinical phases of RA development were examined using Kruskal-Wallis or Mann-Whitney tests (α = 0.05). RESULTS None of the IgGs directed against individual periodontal pathogens significantly differed between the four groups of RA-FDRs. Further analyses of cumulated IgG levels into bacterial clusters representative of periodontal infections revealed significantly higher IgG titres against periodontopathogens in anti-citrullinated protein antibodies (ACPA)-positive RA-FDRs (P = 0.015). Current smoking displayed a marked trend towards reduced IgG titres against periodontopathogens. CONCLUSION Our results do not suggest an association between serum IgG titres against individual periodontal pathogens and specific preclinical phases of RA development. However, associations between cumulative IgG titres against periodontopathogens and the presence of ACPAs suggest a synergistic contribution of periodontopathogens to ACPA development.
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Affiliation(s)
- Daniel Manoil
- Division of Oral Diseases, Department of Dental Medicine, Karolinska Institutet, Stockholm, Sweden
| | - Delphine S Courvoisier
- Division of Rheumatology, Department of Internal Medicine Specialties, University Hospitals of Geneva, Geneva
| | - Benoit Gilbert
- Division of Rheumatology, Department of Internal Medicine Specialties, University Hospitals of Geneva, Geneva
| | - Burkhard Möller
- Department of Rheumatology, Immunology and Allergology, University Hospital Inselspital Bern, Bern
| | | | | | - Andrea Rubbert-Roth
- Division of Rheumatology and Immunology, Kantonsspital St. Gallen, St Gallen
| | - Axel Finckh
- Division of Rheumatology, Department of Internal Medicine Specialties, University Hospitals of Geneva, Geneva
| | - Nagihan Bostanci
- Division of Oral Diseases, Department of Dental Medicine, Karolinska Institutet, Stockholm, Sweden.,Center of Dental Medicine, University of Zürich, Zürich, Switzerland
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28
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Abstract
Periodontal diseases are chronic inflammatory, multifactorial diseases where the major triggering factors for disease onset are bacteria and their toxins, but the major part of tissue destruction occurs as a result of host response towards the periodontal microbiome. Periodontal microbiome consists of a wide range of microorganisms including obligate and facultative anaerobes. In health, there is a dynamic balance between the host, environment, and the microbiome. Environmental factors, mainly tobacco smoking and psychological stress, disrupt the symbiotic relationship. Tobacco smoke and its components alter the bacterial surface and functions such as growth. Psychological stressors and stress hormones may affect the outcome of an infection by changing the virulence factors and/or host response. This review aims to provide currently available data on the effects of the major environmental factors on the periodontal microbiome.
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Affiliation(s)
- Nurcan Buduneli
- Department of Periodontology, Faculty of Dentistry, Ege University, İzmir, Turkey
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29
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Teles F, Wang Y, Hajishengallis G, Hasturk H, Marchesan JT. Impact of systemic factors in shaping the periodontal microbiome. Periodontol 2000 2020; 85:126-160. [PMID: 33226693 DOI: 10.1111/prd.12356] [Citation(s) in RCA: 51] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Since 2010, next-generation sequencing platforms have laid the foundation to an exciting phase of discovery in oral microbiology as it relates to oral and systemic health and disease. Next-generation sequencing has allowed large-scale oral microbial surveys, based on informative marker genes, such as 16S ribosomal RNA, community gene inventories (metagenomics), and functional analyses (metatranscriptomics), to be undertaken. More specifically, the availability of next-generation sequencing has also paved the way for studying, in greater depth and breadth, the effect of systemic factors on the periodontal microbiome. It was natural to investigate systemic diseases, such as diabetes, in such studies, along with systemic conditions or states, , pregnancy, menopause, stress, rheumatoid arthritis, and systemic lupus erythematosus. In addition, in recent years, the relevance of systemic "variables" (ie, factors that are not necessarily diseases or conditions, but may modulate the periodontal microbiome) has been explored in detail. These include ethnicity and genetics. In the present manuscript, we describe and elaborate on the new and confirmatory findings unveiled by next-generation sequencing as it pertains to systemic factors that may shape the periodontal microbiome. We also explore the systemic and mechanistic basis for such modulation and highlight the importance of those relationships in the management and treatment of patients.
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Affiliation(s)
- Flavia Teles
- Department of Basic and Translational Sciences, Center for Innovation & Precision Dentistry, School of Dental Medicine & School of Engineering and Applied Sciences, University of Pennsylvania, Philadelphia, PA, USA
| | - Yu Wang
- Department of Periodontics, School of Dental Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - George Hajishengallis
- Department of Basic and Translational Sciences, School of Dental Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - Hatice Hasturk
- Center for Clinical and Translational Research, The Forsyth Institute, Cambridge, MA, USA
| | - Julie T Marchesan
- Department of Comprehensive Oral Health, Periodontology, Adams School of Dentistry, University of North Carolina, Chapel Hill, NC, USA
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30
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Feres M, Retamal-Valdes B, Gonçalves C, Cristina Figueiredo L, Teles F. Did Omics change periodontal therapy? Periodontol 2000 2020; 85:182-209. [PMID: 33226695 DOI: 10.1111/prd.12358] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
The starting point for defining effective treatment protocols is a clear understanding of the etiology and pathogenesis of a condition. In periodontal diseases, this understanding has been hindered by a number of factors, such as the difficulty in differentiating primary pathogens from nonpathogens in complex biofilm structures. The introduction of DNA sequencing technologies, including taxonomic and functional analyses, has allowed the oral microbiome to be investigated in much greater breadth and depth. This article aims to compile the results of studies, using next-generation sequencing techniques to evaluate the periodontal microbiome, in an attempt to determine how far the knowledge provided by these studies has brought us in terms of influencing the way we treat periodontitis. The taxonomic data provided, to date, by published association and elimination studies using next-generation sequencing confirm previous knowledge on the role of classic periodontal pathogens in the pathobiology of disease and include new species/genera. Conversely, species and genera already considered as host-compatible and others less explored were associated with periodontal health as their levels were elevated in healthy individuals and increased after therapy. Functional and transcriptomic analyses also demonstrated that periodontal biofilms are taxonomically diverse, functionally congruent, and highly cooperative. Very few interventional studies to date have examined the effects of treatment on the periodontal microbiome, and such studies are heterogeneous in terms of design, sample size, sampling method, treatment provided, and duration of follow-up. Hence, it is still difficult to draw meaningful conclusions from them. Thus, although OMICS knowledge has not yet changed the way we treat patients in daily practice, the information provided by these studies opens new avenues for future research in this field. As new pathogens and beneficial species become identified, future randomized clinical trials could monitor these species/genera more comprehensively. In addition, the metatranscriptomic data, although still embryonic, suggest that the interplay between the host and the oral microbiome may be our best opportunity to implement personalized periodontal treatments. Therapeutic schemes targeting particular bacterial protein products in subjects with specific genetic profiles, for example, may be the futuristic view of enhanced periodontal therapy.
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Affiliation(s)
- Magda Feres
- Department of Periodontology, Dental Research Division, Guarulhos University, Guarulhos, Brazil
| | - Belén Retamal-Valdes
- Department of Periodontology, Dental Research Division, Guarulhos University, Guarulhos, Brazil
| | - Cristiane Gonçalves
- Department of Periodontology, Estácio de Sá University, Rio de Janeiro, Brazil
| | | | - Flavia Teles
- Center for Innovation & Precision Dentistry, School of Dental Medicine, School of Engineering and Applied Sciences, University of Pennsylvania, Philadelphia, PA, USA
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31
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Al Bataineh MT, Dash NR, Elkhazendar M, Alnusairat DMH, Darwish IMI, Al-Hajjaj MS, Hamid Q. Revealing oral microbiota composition and functionality associated with heavy cigarette smoking. J Transl Med 2020; 18:421. [PMID: 33167991 PMCID: PMC7653996 DOI: 10.1186/s12967-020-02579-3] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2020] [Accepted: 10/24/2020] [Indexed: 12/13/2022] Open
Abstract
BACKGROUND Heavy tobacco smoking, a hallmark feature of lung cancer, is drastically predominant in Middle Eastern populations. The precise links between nicotine dependence and the functional contribution of the oral microbiota remain unknown in these populations. METHODS We evaluated the composition and functional capabilities of oral microbiota with relation to cigarette smoking in 105 adults through shotgun metagenomics using buccal swabs. RESULTS The oral microbiota composition in our study subjects was dominated by the phyla Firmicutes, Proteobacteria, Actinobacteria, and Bacteroidetes, in addition to the genera Prevotella and Veillonella, similar to previously described westernized cohorts. Furthermore, the smoker's oral microbiota represented a significant abundance of Veillonella dispar, Leptotrichia spp. and Prevotella pleuritidis when compared to non-smokers. Within the smoking groups, differential relative abundance testing unveiled relative abundance of Streptobacillus hongkongensis, Fusobacterium massiliense, Prevotella bivia in high nicotine dependent compared to low nicotine dependent profiles based on Fagerström Test for Nicotine Dependence. Functional profiling showed marked differences between smokers and non-smokers. Smokers exhibited an enrichment of Tricarballylate utilization and Lactate racemization when compared to the non-smokers. According to their nicotine dependence, enrichment of Xanthosine utilization, p-Aminobenzoyl-Glutamate utilization, and multidrug efflux pump in Campylobacter jejuni biosynthesis modules were detected in the high nicotine dependent group. CONCLUSIONS These compositional and functional differences may provide critical insight on how variations in the oral microbiota could predispose to respiratory illnesses and smoke cessation relapse in cigarette smokers. In particular, the observed enrichment of Fusobacterium and Prevotella in the oral microbiota possibly suggests an intriguing linkage to gut and lung cancers.
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Affiliation(s)
- Mohammad Tahseen Al Bataineh
- Clinical Sciences Department, College of Medicine, University of Sharjah, 27272, Sharjah, United Arab Emirates. .,Sharjah Institute for Medical Research, University of Sharjah, Sharjah, United Arab Emirates.
| | - Nihar Ranjan Dash
- Clinical Sciences Department, College of Medicine, University of Sharjah, 27272, Sharjah, United Arab Emirates
| | - Mohammed Elkhazendar
- Clinical Sciences Department, College of Medicine, University of Sharjah, 27272, Sharjah, United Arab Emirates
| | | | | | - Mohamed Saleh Al-Hajjaj
- Clinical Sciences Department, College of Medicine, University of Sharjah, 27272, Sharjah, United Arab Emirates.,University Hospital Sharjah, Sharjah, United Arab Emirates
| | - Qutayba Hamid
- Sharjah Institute for Medical Research, University of Sharjah, Sharjah, United Arab Emirates.,Meakins-Christie Laboratories, McGill University, Montreal, QC, Canada
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32
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Hajishengallis G, Chavakis T, Lambris JD. Current understanding of periodontal disease pathogenesis and targets for host-modulation therapy. Periodontol 2000 2020; 84:14-34. [PMID: 32844416 DOI: 10.1111/prd.12331] [Citation(s) in RCA: 166] [Impact Index Per Article: 41.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Recent advances indicate that periodontitis is driven by reciprocally reinforced interactions between a dysbiotic microbiome and dysregulated inflammation. Inflammation is not only a consequence of dysbiosis but, via mediating tissue dysfunction and damage, fuels further growth of selectively dysbiotic communities of bacteria (inflammophiles), thereby generating a self-sustained feed-forward loop that perpetuates the disease. These considerations provide a strong rationale for developing adjunctive host-modulation therapies for the treatment of periodontitis. Such host-modulation approaches aim to inhibit harmful inflammation and promote its resolution or to interfere directly with downstream effectors of connective tissue and bone destruction. This paper reviews diverse strategies targeted to modulate the host periodontal response and discusses their mechanisms of action, perceived safety, and potential for clinical application.
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Affiliation(s)
- George Hajishengallis
- Department of Basic and Translational Sciences, Penn Dental Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - Triantafyllos Chavakis
- Department of Clinical Pathobiochemistry, Faculty of Medicine, Institute for Clinical Chemistry and Laboratory Medicine, Technische Universität Dresden, Dresden, Germany
| | - John D Lambris
- Department of Pathology and Laboratory Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA
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Kumar PS. Interventions to prevent periodontal disease in tobacco-, alcohol-, and drug-dependent individuals. Periodontol 2000 2020; 84:84-101. [PMID: 32844411 DOI: 10.1111/prd.12333] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Substance abuse affects more than one sixth of the world's population. More importantly, the nature of the abuse and the type of addictive substances available to individuals is increasing exponentially. All substances with abusive potential impact both the human immuno-inflammatory system and oral microbial communities, and therefore play a critical role in the etiopathogenesis of periodontal diseases. Evidence strongly supports the efficacy of professionally delivered cessation counseling. Dentists, dental therapists, and hygienists are ideally placed to deliver this therapy, and to spearhead efforts to provide behavioral and pharmacologic support for cessation. The purpose of this review is to examine the biologic mechanisms underlying their role in disease causation, to understand the pharmacologic and behavioral basis for their habituation, and to investigate the efficacy of population-based and personalized interventions in prevention of periodontal disease.
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Affiliation(s)
- Purnima S Kumar
- Division of Periodontology, College of Dentistry, The Ohio State University, Columbus, USA
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Bostanci N, Silbereisen A, Bao K, Grossmann J, Nanni P, Fernandez C, Nascimento GG, Belibasakis GN, Lopez R. Salivary proteotypes of gingivitis tolerance and resilience. J Clin Periodontol 2020; 47:1304-1316. [PMID: 32777086 PMCID: PMC7692908 DOI: 10.1111/jcpe.13358] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2020] [Revised: 07/19/2020] [Accepted: 08/05/2020] [Indexed: 12/18/2022]
Abstract
Aim This study aimed to characterize the salivary proteome during the induction and resolution of gingival inflammation in the course of human experimental gingivitis (EG), and to cluster the proteomic profiles based on the clinically defined “slow” and “fast” response patterns. Materials and Methods A total of 50 unstimulated whole saliva were obtained from the EG model which was induced over 21 days (days 0, 7, 14 and 21), followed by a two‐week resolution phase (day 35). Label‐free quantitative proteomics using liquid chromatography–tandem mass spectrometry was applied. Regulated proteins were subject to Gene Ontology enrichment analysis. Results A total of 804 human proteins were quantified by ≥ 2 peptides. Principal component analysis depicted significant differences between “fast” and “slow” responders. Despite gingival and plaque scores being similar at baseline among the two groups, “fast” responders presented with 48 proteins that were at > 4‐fold higher levels than “slow” responders. These up‐regulated proteins showed enrichment in “antigen presentation” and “proteolysis.” Conclusions Together, these findings highlight the utility of integrative systems‐level quantitative proteomic approaches to unravel the molecular basis of “salivary proteotypes” associated with gingivitis dubbed as “fast” and “slow” responders. Hence, these differential responses may help prognosticate individual susceptibility to gingival inflammation.
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Affiliation(s)
- Nagihan Bostanci
- Section of Periodontology and Dental Prevention, Division of Oral Diseases, Department of Dental Medicine, Karolinska Institutet, Stockholm, Sweden
| | - Angelika Silbereisen
- Section of Periodontology and Dental Prevention, Division of Oral Diseases, Department of Dental Medicine, Karolinska Institutet, Stockholm, Sweden
| | - Kai Bao
- Section of Periodontology and Dental Prevention, Division of Oral Diseases, Department of Dental Medicine, Karolinska Institutet, Stockholm, Sweden
| | - Jonas Grossmann
- Functional Genomic Center Zurich, ETH Zurich and University of Zurich, Zurich, Switzerland
| | - Paolo Nanni
- Functional Genomic Center Zurich, ETH Zurich and University of Zurich, Zurich, Switzerland
| | - Claudia Fernandez
- Functional Genomic Center Zurich, ETH Zurich and University of Zurich, Zurich, Switzerland
| | - Gustavo G Nascimento
- Section of Periodontology, Department of Dentistry and Oral Health, Aarhus University, Aarhus, Denmark
| | - Georgios N Belibasakis
- Section of Periodontology and Dental Prevention, Division of Oral Diseases, Department of Dental Medicine, Karolinska Institutet, Stockholm, Sweden
| | - Rodrigo Lopez
- Section of Periodontology, Department of Dentistry and Oral Health, Aarhus University, Aarhus, Denmark
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35
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Xu M, Zhang H, Yu N, Dong Y, Wang W, Chen Y, Kang J. Cigarette smoke extract induces the Pseudomonas aeruginosa nfxC drug-resistant phenotype. J Infect Chemother 2020; 26:1278-1282. [PMID: 32800691 DOI: 10.1016/j.jiac.2020.07.013] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2020] [Revised: 07/09/2020] [Accepted: 07/23/2020] [Indexed: 12/29/2022]
Abstract
BACKGROUND There is clinical and epidemiological evidence indicating that cigarette smoke exposure can significantly increase the usage of antibiotics by smokers to treat pulmonary infections, suggesting an increased risk of bacterial drug resistance. Pseudomonas aeruginosa is commonly found in infectious diseases closely related to cigarette smoke exposure and frequently acquires drug resistance. Recently, a study has demonstrated that cigarette smoke extract may induce Pseudomonas aeruginosa antibiotic resistance but the mechanism remain unknown. OBJECTIVES To explore the effect of cigarette smoke exposure on drug resistance in P. aeruginosa and the underlying mechanism using an in vitro model of cigarette smoke extract (CSE) exposure. METHODS P. aeruginosa strains PAO1, PA103 and ATCC27853 were used in this study. Changes in drug resistance in P. aeruginosa after CSE exposure were evaluated by antimicrobial susceptibility tests. Additionally, differentially expressed genes related to drug resistance were detected by transcriptome sequencing and qRT-PCR. RESULTS CSE increased both the MIC and MBC of levofloxacin and imipenem (MIC was not changed in ATCC 27853) against P. aeruginosa. However, CSE could only increase the minimum inhibitory concentration of tigecycline and minocycline against P. aeruginosa. Transcriptome sequencing and qRT-PCR indicated that MvaT and OprD levels decreased and MexEF-OprN levels increased. CONCLUSIONS Overall, our results showed that CSE may induce antibiotic resistance in P. aeruginosa. The results of antimicrobial susceptibility tests, transcriptome sequencing and qRT-PCR showed that CSE induced P. aeruginosa to the nfxC drug-resistant phenotype.
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Affiliation(s)
- Mingtao Xu
- Institute of Respiratory Diseases, The First Hospital of China Medical University, Shenyang, China
| | - Hanyin Zhang
- Institute of Respiratory Diseases, The First Hospital of China Medical University, Shenyang, China
| | - Na Yu
- Institute of Respiratory Diseases, The First Hospital of China Medical University, Shenyang, China
| | - Ying Dong
- Department of Pulmonary and Critical Care Medicine, Shengjing Hospital of China Medical University, Shenyang, China
| | - Wei Wang
- Institute of Respiratory Diseases, The First Hospital of China Medical University, Shenyang, China
| | - Yu Chen
- Department of Pulmonary and Critical Care Medicine, Shengjing Hospital of China Medical University, Shenyang, China.
| | - Jian Kang
- Institute of Respiratory Diseases, The First Hospital of China Medical University, Shenyang, China.
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Rosier BT, Buetas E, Moya-Gonzalvez EM, Artacho A, Mira A. Nitrate as a potential prebiotic for the oral microbiome. Sci Rep 2020; 10:12895. [PMID: 32732931 PMCID: PMC7393384 DOI: 10.1038/s41598-020-69931-x] [Citation(s) in RCA: 69] [Impact Index Per Article: 17.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2020] [Accepted: 07/21/2020] [Indexed: 12/13/2022] Open
Abstract
The salivary glands actively concentrate plasma nitrate, leading to high salivary nitrate concentrations (5–8 mM) after a nitrate-rich vegetable meal. Nitrate is an ecological factor that can induce rapid changes in structure and function of polymicrobial communities, but the effects on the oral microbiota have not been clarified. To test this, saliva of 12 healthy donors was collected to grow in vitro biofilms with and without 6.5 mM nitrate. Samples were taken at 5 h (most nitrate reduced) and 9 h (all nitrate reduced) of biofilm formation for ammonium, lactate and pH measurements, as well as 16S rRNA gene Illumina sequencing. Nitrate did not affect biofilm growth significantly, but reduced lactate production, while increasing the observed ammonium production and pH (all p < 0.01). Significantly higher levels of the oral health-associated nitrate-reducing genera Neisseria (3.1 ×) and Rothia (2.9 ×) were detected in the nitrate condition already after 5 h (both p < 0.01), while several caries-associated genera (Streptococcus, Veillonella and Oribacterium) and halitosis- and periodontitis-associated genera (Porphyromonas, Fusobacterium, Leptotrichia, Prevotella, and Alloprevotella) were significantly reduced (p < 0.05 at 5 h and/or 9 h). In conclusion, the addition of nitrate to oral communities led to rapid modulation of microbiome composition and activity that could be beneficial for the host (i.e., increasing eubiosis or decreasing dysbiosis). Nitrate should thus be investigated as a potential prebiotic for oral health.
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Affiliation(s)
- B T Rosier
- Department of Health and Genomics, Center for Advanced Research in Public Health, FISABIO Foundation, Avenida de Catalunya 21, 46020, Valencia, Spain
| | - E Buetas
- Department of Health and Genomics, Center for Advanced Research in Public Health, FISABIO Foundation, Avenida de Catalunya 21, 46020, Valencia, Spain
| | - E M Moya-Gonzalvez
- Department of Health and Genomics, Center for Advanced Research in Public Health, FISABIO Foundation, Avenida de Catalunya 21, 46020, Valencia, Spain
| | - A Artacho
- Department of Health and Genomics, Center for Advanced Research in Public Health, FISABIO Foundation, Avenida de Catalunya 21, 46020, Valencia, Spain
| | - Alex Mira
- Department of Health and Genomics, Center for Advanced Research in Public Health, FISABIO Foundation, Avenida de Catalunya 21, 46020, Valencia, Spain.
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Hagenfeld D, Matern J, Prior K, Harks I, Eickholz P, Lorenz K, Kim TS, Kocher T, Meyle J, Kaner D, Schlagenhauf U, Harmsen D, Ehmke B. Significant Short-Term Shifts in the Microbiomes of Smokers With Periodontitis After Periodontal Therapy With Amoxicillin & Metronidazole as Revealed by 16S rDNA Amplicon Next Generation Sequencing. Front Cell Infect Microbiol 2020; 10:167. [PMID: 32477961 PMCID: PMC7232543 DOI: 10.3389/fcimb.2020.00167] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2020] [Accepted: 03/30/2020] [Indexed: 12/28/2022] Open
Abstract
The aim of this follow-up study was, to compare the effects of mechanical periodontal therapy with or without adjunctive amoxicillin and metronidazole on the subgingival microbiome of smokers with periodontitis using 16S rDNA amplicon next generation sequencing. Fifty-four periodontitis patients that smoke received either non-surgical periodontal therapy with adjunctive amoxicillin and metronidazole (n = 27) or with placebos (n = 27). Subgingival plaque samples were taken before and two months after therapy. Bacterial genomic DNA was isolated and the V4 hypervariable region of the bacterial 16S rRNA genes was amplified. Up to 96 libraries were normalized and pooled for Illumina MiSeq paired-end sequencing with almost fully overlapping 250 base pairs reads. Exact ribosomal sequence variants (RSVs) were inferred with DADA2. Microbial diversity and changes on the genus and RSV level were analyzed with non-parametric tests and a negative binomial regression model, respectively. Before therapy, the demographic, clinical, and microbial parameters were not significantly different between the placebo and antibiotic groups. Two months after the therapy, clinical parameters improved and there was a significantly increased dissimilarity of microbiomes between the two groups. In the antibiotic group, there was a significant reduction of genera classified as Porphyromonas, Tannerella, and Treponema, and 22 other genera also decreased significantly, while Selenomonas, Capnocytophaga, Actinomycetes, and five other genera significantly increased. In the placebo group, however, there was not a significant decrease in periodontal pathogens after therapy and only five other genera decreased, while Veillonella and nine other genera increased. We conclude that in periodontitis patients who smoke, microbial shifts occurred two months after periodontal therapy with either antibiotics or placebo, but genera including periodontal pathogens decreased significantly only with adjunctive antibiotics.
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Affiliation(s)
- Daniel Hagenfeld
- Department of Periodontology and Operative Dentistry, Münster University Hospital, Münster, Germany
| | - Johannes Matern
- Department of Periodontology and Operative Dentistry, Münster University Hospital, Münster, Germany
| | - Karola Prior
- Department of Periodontology and Operative Dentistry, Münster University Hospital, Münster, Germany
| | - Inga Harks
- Department of Periodontology and Operative Dentistry, Münster University Hospital, Münster, Germany
| | - Peter Eickholz
- Department of Periodontology, Johann Wolfgang Goethe-University Frankfurt, Frankfurt, Germany
| | - Katrin Lorenz
- Department of Periodontology, TU Dresden, Dresden, Germany
| | - Ti-Sun Kim
- Section of Periodontology, Department of Conservative Dentistry, University Hospital Heidelberg, Heidelberg, Germany
| | - Thomas Kocher
- Unit of Periodontology, University Medicine Greifswald, Greifswald, Germany
| | - Jörg Meyle
- Department of Periodontology, University of Giessen, Giessen, Germany
| | - Doğan Kaner
- Department of Periodontology, Dental School, Faculty of Health, University of Witten/Herdecke, Witten, Germany.,Departments of Periodontology and Synoptic Dentistry, Charité University Medicine Berlin, Berlin, Germany
| | - Ulrich Schlagenhauf
- Department of Periodontology, University Hospital Würzburg, Würzburg, Germany
| | - Dag Harmsen
- Department of Periodontology and Operative Dentistry, Münster University Hospital, Münster, Germany
| | - Benjamin Ehmke
- Department of Periodontology and Operative Dentistry, Münster University Hospital, Münster, Germany
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Ganesan SM, Dabdoub SM, Nagaraja HN, Scott ML, Pamulapati S, Berman ML, Shields PG, Wewers ME, Kumar PS. Adverse effects of electronic cigarettes on the disease-naive oral microbiome. SCIENCE ADVANCES 2020; 6:eaaz0108. [PMID: 32518820 PMCID: PMC7253170 DOI: 10.1126/sciadv.aaz0108] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/05/2019] [Accepted: 03/20/2020] [Indexed: 06/11/2023]
Abstract
Six percent of Americans, including 3 million high schoolers, use e-cigarettes, which contain potentially toxic substances, volatile organic compounds, and metals. We present the first human study on the effects of e-cigarette exposure in the oral cavity. By interrogating both immunoinflammatory responses and microbial functional dynamics, we discovered pathogen overrepresentation, higher virulence signatures, and a brisk proinflammatory signal in clinically healthy e-cigarette users, equivalent to patients with severe periodontitis. Using RNA sequencing and confocal and electron microscopy to validate these findings, we demonstrate that the carbon-rich glycol/glycerol vehicle is an important catalyst in transforming biofilm architecture within 24 hours of exposure. Last, a machine-learning classifier trained on the metagenomic signatures of e-cigarettes identified as e-cigarette users both those individuals who used e-cigarettes to quit smoking, and those who use both e-cigarettes and cigarettes. The present study questions the safety of e-cigarettes and the harm reduction narrative promoted by advertising campaigns.
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Affiliation(s)
- Sukirth M. Ganesan
- Division of Periodontology, The Ohio State University, Columbus, OH, USA
| | - Shareef M. Dabdoub
- Division of Periodontology, The Ohio State University, Columbus, OH, USA
| | | | - Michelle L. Scott
- Division of Periodontology, The Ohio State University, Columbus, OH, USA
| | - Surya Pamulapati
- College of Public Health, The Ohio State University, Columbus, OH, USA
| | - Micah L. Berman
- Moritz College of Law, The Ohio State University, Columbus, OH, USA
| | - Peter G. Shields
- Wexner Medical Center, The Ohio State University, Columbus, OH, USA
| | - Mary Ellen Wewers
- College of Public Health, The Ohio State University, Columbus, OH, USA
| | - Purnima S. Kumar
- Division of Periodontology, The Ohio State University, Columbus, OH, USA
- James Comprehensive Cancer Center, The Ohio State University, Columbus, OH, USA
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Ercan N, Olgun E, Kisa Ü, Yalim M. Effect of synbiotics in the treatment of smokers and non-smokers with gingivitis: randomized controlled trial. Aust Dent J 2020; 65:210-219. [PMID: 32147827 DOI: 10.1111/adj.12755] [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] [Accepted: 03/01/2020] [Indexed: 11/29/2022]
Abstract
BACKGROUND To evaluate the efficacy of synbiotic tablets on the clinical and biochemical parameters of smokers and non-smokers with gingivitis. METHODS Eighty patients with gingivitis [40 smokers (+), 40 non-smokers (-)] were randomly assigned to test (T) or control (C) groups. Four groups were defined: T(+), T(-), C(+) and C(-). The subjects daily chewed a synbiotic or placebo tablet for 30 days. The gingival crevicular fluid levels of interleukin (IL)-6, IL-8 and IL-10 were determined as the primary outcome variables. RESULTS The clinical and biochemical parameters for all groups significantly reduced compared with the baseline (P < 0.05). While there were no significant differences between the groups for gingival index, the plaque index was significantly higher in both smoker groups than that in the T(-) group during the second month (P < 0.05). IL-8 levels in C(-) and IL-6 levels in both control groups were significantly higher than those in the T(+) group. The IL-10 levels in both control groups were significantly higher than those in the T(-) group during the second month (P < 0.05). CONCLUSIONS Adjunctive synbiotic tablets significantly reduce subclinical therapeutic outcomes for both smokers and non-smokers compared with placebo according to the biochemical parameters.
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Affiliation(s)
- N Ercan
- Periodontology Department, Faculty of Dentistry, Kirikkale University, Kirikkale, Turkey
| | - E Olgun
- Periodontology Department, Faculty of Dentistry, Kirikkale University, Kirikkale, Turkey
| | - Ü Kisa
- Biochemistry Department, Faculty of Medicine, Kirikkale University, Kirikkale, Turkey
| | - M Yalim
- Periodontology Department, Faculty of Dentistry, Gazi University, Ankara, Turkey
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40
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Jiang Y, Zhou X, Cheng L, Li M. The Impact of Smoking on Subgingival Microflora: From Periodontal Health to Disease. Front Microbiol 2020; 11:66. [PMID: 32063898 PMCID: PMC7000377 DOI: 10.3389/fmicb.2020.00066] [Citation(s) in RCA: 42] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2019] [Accepted: 01/13/2020] [Indexed: 02/05/2023] Open
Abstract
Periodontal disease is one of the most common diseases of the oral cavity affecting up to 90% of the worldwide population. Smoking has been identified as a major risk factor in the development and progression of periodontal disease. It is essential to assess the influence of smoking on subgingival microflora that is the principal etiological factor of the disease to clarify the contribution of smoking to periodontal disease. Therefore, this article reviews the current research findings regarding the impact of smoking on subgingival microflora and discusses several potential mechanisms. Cultivation-based and targeted molecular approaches yield controversial results in determining the presence or absence of smoking-induced differences in the prevalence or levels of certain periodontal pathogens, such as the “red complex.” However, substantial changes in the subgingival microflora of smokers, regardless of their periodontal condition (clinical health, gingivitis, or periodontitis), have been demonstrated in recent microbiome studies. Available literature suggests that smoking facilitates early acquisition and colonization of periodontal pathogens, resulting in an “at-risk-for-harm” subgingival microbial community in the healthy periodontium. In periodontal diseases, the subgingival microflora in smokers is characterized by a pathogen-enriched community with lower resilience compared to that in non-smokers, which increases the difficulty of treatment. Biological changes in key pathogens, such as Porphyromonas gingivalis, together with the ineffective host immune response for clearance, might contribute to alterations in the subgingival microflora in smokers. Nonetheless, further studies are necessary to provide solid evidence for the underlying mechanisms.
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Affiliation(s)
- Yaling Jiang
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China.,Department of Operative Dentistry and Endodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Xuedong Zhou
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China.,Department of Operative Dentistry and Endodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Lei Cheng
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China.,Department of Operative Dentistry and Endodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Mingyun Li
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China
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Hutcherson JA, Gogenini H, Lamont GJ, Miller DP, Nowakowska Z, Lasica AM, Liu C, Potempa J, Lamont RJ, Yoder-Himes D, Scott DA. Porphyromonas gingivalis genes conferring fitness in a tobacco-rich environment. Mol Oral Microbiol 2020; 35:10-18. [PMID: 31742917 PMCID: PMC8202090 DOI: 10.1111/omi.12273] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2019] [Revised: 11/06/2019] [Accepted: 11/13/2019] [Indexed: 02/05/2023]
Abstract
Smokers are more likely than non-smokers to harbour Porphyromonas gingivalis, they are more susceptible to destructive periodontal disease and smokers may, ultimately, benefit from tobacco-specific preventive and treatment strategies. A Mariner transposon insertion library for P. gingivalis ATCC 33277 was exploited to define 256 genes as essential for P. gingivalis survival in a tobacco-rich environment. Genes whose products play roles in protein transport and catabolism, nicotinamide processing, protection against oxidative stress, drug resistance, and transcriptional regulation have all been identified as essential for CSE survival. Many of these tobacco-essential genes are also requisite for epithelial colonization and abscess formation, suggestive of a core stress-related P. gingivalis genome. Single-gene deletions in several of the TnSeq-implicated genes led to significantly reduced P. gingivalis fitness upon competition with the parent strain, under conditions of cigarette smoke extract-induced stress (1,000 ng/ml nicotine equivalents). This study identifies, for the first time, a subset of P. gingivalis genes required for surviving the plethora of insults present in cigarette smoke. Such conditionally essential genes may delineate bacterial persistence strategies and represent novel therapeutic foci for the prevention of P. gingivalis infection and related diseases in smokers and in general.
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Affiliation(s)
| | | | | | - Daniel P. Miller
- Oral Immunology and Infectious Diseases, University of Louisville
| | - Zuzanna Nowakowska
- Oral Immunology and Infectious Diseases, University of Louisville
- Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Poland
| | - Anna M. Lasica
- Oral Immunology and Infectious Diseases, University of Louisville
- Department of Bacterial Genetics, Institute of Microbiology, Faculty of Biology, University of Warsaw, Warsaw, Poland
| | - Chengcheng Liu
- Oral Immunology and Infectious Diseases, University of Louisville
- West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Jan Potempa
- Oral Immunology and Infectious Diseases, University of Louisville
- Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Poland
| | | | | | - David A. Scott
- Oral Immunology and Infectious Diseases, University of Louisville
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Nazir MA, Al-Ansari A, Abbasi N, Almas K. Global Prevalence of Tobacco Use in Adolescents and Its Adverse Oral Health Consequences. Open Access Maced J Med Sci 2019; 7:3659-3666. [PMID: 32010395 PMCID: PMC6986508 DOI: 10.3889/oamjms.2019.542] [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: 08/23/2019] [Revised: 09/04/2019] [Accepted: 09/05/2019] [Indexed: 12/17/2022] Open
Abstract
BACKGROUND: Smoking is associated with various systemic conditions and contributes to a huge financial burden to economies around the world. AIM: The study aimed to evaluate global data about the prevalence of tobacco use among male and female adolescents and to discuss smoking-related oral complications. METHODS: The prevalence data of tobacco use among adolescents (13-15 years) was retrieved from the World Health Organization (Global Health Observatory). The World Bank’s statistics about gross national income (GNI) per capita were used to categorise low-income, lower-middle-income, upper-middle-income, and high-income countries. PubMed, Web of Science, Scopus, and Embase databases were searched to gather updated evidence about the adverse consequences of smoking on oral health among adolescents. RESULTS: The prevalence of tobacco use was 19.33%, and there were 23.29% of male and 15.35% female smoker adolescents in 133 countries (p < 0.001). The highest prevalence of tobacco use in male (24.76%) and female (19.4) adolescents was found in high-income countries. Significantly higher proportions of male adolescents were smokers than female counterparts in low-income, lower-middle-income, and upper-middle-income (p < 0.001). However, there were no statistically significant differences in tobacco use between male and female adolescents in high-income countries. Low-income countries had the lowest prevalence (14.95%) of tobacco use, while high-income countries had the highest prevalence estimates (22.08). Gingivitis (72.8%), gingival bleeding (51.2%), oral malodor or halitosis (39.6%) is common oral conditions among smoker adolescents. Smoking habit is significantly associated with dental caries, periodontal disease, hairy tongue, smoking-related melanosis, and hyperkeratosis among adolescents. CONCLUSION: There was a high prevalence of tobacco use among male and female adolescents around the globe. Available evidence suggests a strong association between smoking and compromised oral health among adolescents. Globally, measures should be taken to prevent and control the menace of tobacco use to reduce systemic and oral complications.
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Affiliation(s)
- Muhammad Ashraf Nazir
- Department of Preventive Dental Sciences, College of Dentistry, Imam Abdulrahman Bin Faisal University, Dammam, Saudi Arabia
| | - Asim Al-Ansari
- Department of Preventive Dental Sciences, College of Dentistry, Imam Abdulrahman Bin Faisal University, Dammam, Saudi Arabia
| | - Nabeela Abbasi
- Department of Oral Biology, Rawal Institute of Health Sciences, Islamabad, Pakistan
| | - Khalid Almas
- Department of Preventive Dental Sciences, College of Dentistry, Imam Abdulrahman Bin Faisal University, Dammam, Saudi Arabia
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Beghini F, Renson A, Zolnik CP, Geistlinger L, Usyk M, Moody TU, Thorpe L, Dowd JB, Burk R, Segata N, Jones HE, Waldron L. Tobacco exposure associated with oral microbiota oxygen utilization in the New York City Health and Nutrition Examination Study. Ann Epidemiol 2019; 34:18-25.e3. [PMID: 31076212 PMCID: PMC6548637 DOI: 10.1016/j.annepidem.2019.03.005] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2018] [Revised: 02/13/2019] [Accepted: 03/12/2019] [Indexed: 01/10/2023]
Abstract
PURPOSE The effect of tobacco exposure on the oral microbiome has not been established. METHODS We performed amplicon sequencing of the 16S ribosomal RNA gene V4 variable region to estimate bacterial community characteristics in 259 oral rinse samples, selected based on self-reported smoking and serum cotinine levels, from the 2013-2014 New York City Health and Nutrition Examination Study. We identified differentially abundant operational taxonomic units (OTUs) by primary and secondhand tobacco exposure, and used "microbe set enrichment analysis" to assess shifts in microbial oxygen utilization. RESULTS Cigarette smoking was associated with depletion of aerobic OTUs (Enrichment Score test statistic ES = -0.75, P = .002) with a minority (29%) of aerobic OTUs enriched in current smokers compared with never smokers. Consistent shifts in the microbiota were observed for current cigarette smokers as for nonsmokers with secondhand exposure as measured by serum cotinine levels. Differential abundance findings were similar in crude and adjusted analyses. CONCLUSIONS Results support a plausible link between tobacco exposure and shifts in the oral microbiome at the population level through three lines of evidence: (1) a shift in microbiota oxygen utilization associated with primary tobacco smoke exposure; (2) consistency of abundance fold changes associated with current smoking and shifts along the gradient of secondhand smoke exposure among nonsmokers; and (3) consistency after adjusting for a priori hypothesized confounders.
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Affiliation(s)
- Francesco Beghini
- Department of Cellular, Computational and Integrative Biology, University of Trento, Trento, Italy
| | - Audrey Renson
- Department of Epidemiology and Biostatistics, City University of New York (CUNY), Graduate School of Public Health and Health Policy, New York
| | - Christine P Zolnik
- Department of Pediatrics, Albert Einstein College of Medicine, Bronx, NY; Department of Biology, Long Island University, Brooklyn, NY
| | - Ludwig Geistlinger
- Department of Epidemiology and Biostatistics, City University of New York (CUNY), Graduate School of Public Health and Health Policy, New York; Institute for Implementation Science in Population Health, City University of New York, New York
| | - Mykhaylo Usyk
- Department of Biology, Long Island University, Brooklyn, NY
| | - Thomas U Moody
- Department of Biology, Long Island University, Brooklyn, NY
| | - Lorna Thorpe
- Division of Epidemiology, Department of Population Health, New York University School of Medicine, New York
| | - Jennifer B Dowd
- Department of Epidemiology and Biostatistics, City University of New York (CUNY), Graduate School of Public Health and Health Policy, New York; Department of Global Health and Social Medicine, King's College London, London, UK
| | - Robert Burk
- Department of Biology, Long Island University, Brooklyn, NY
| | - Nicola Segata
- Department of Cellular, Computational and Integrative Biology, University of Trento, Trento, Italy
| | - Heidi E Jones
- Department of Epidemiology and Biostatistics, City University of New York (CUNY), Graduate School of Public Health and Health Policy, New York; Institute for Implementation Science in Population Health, City University of New York, New York.
| | - Levi Waldron
- Department of Epidemiology and Biostatistics, City University of New York (CUNY), Graduate School of Public Health and Health Policy, New York; Institute for Implementation Science in Population Health, City University of New York, New York
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44
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Hanioka T, Morita M, Yamamoto T, Inagaki K, Wang PL, Ito H, Morozumi T, Takeshita T, Suzuki N, Shigeishi H, Sugiyama M, Ohta K, Nagao T, Hanada N, Ojima M, Ogawa H. Smoking and periodontal microorganisms. JAPANESE DENTAL SCIENCE REVIEW 2019; 55:88-94. [PMID: 31049117 PMCID: PMC6484221 DOI: 10.1016/j.jdsr.2019.03.002] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2018] [Revised: 03/16/2019] [Accepted: 03/28/2019] [Indexed: 12/24/2022] Open
Abstract
Resolution of dysbiosis following treatment for periodontal disease and tobacco dependence has been reported in longitudinal intervention studies. In the present report, we evaluated the biological findings regarding the effect of smoking on the periodontal microbiome. A standardized electronic search was conducted using MEDLINE; overall, 1099 papers were extracted. Studies that addressed the relationship between tobacco and periodontal pathogens were included. Finally, 42 papers were deemed appropriate for the present review. Functional changes in periodontal pathogens exposed to nicotine and cigarette smoke extract support the clinical findings regarding dysbiosis of the subgingival microbiome. Dysbiosis of the periodontal microbiome was presented in smokers regardless of their periodontal condition (healthy, gingivitis, or periodontitis) and remained significant only in smokers even after the resolution of experimentally-induced gingivitis and following reduction of clinical signs of periodontitis with non-surgical periodontal treatment and over 3 months post-therapy. Based on these findings, smoking cessation in periodontitis patients is beneficial for promoting a health-compatible subgingival microbial community. To maximize the benefits of these interventions in dental settings, further studies on periodontal microbiome are needed to elucidate the impact of tobacco intervention on preventing recurrence of periodontal destruction in the susceptible subjects.
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Affiliation(s)
- Takashi Hanioka
- Department of Preventive and Public Health Dentistry, Fukuoka Dental College, Japan
| | - Manabu Morita
- Department of Preventive Dentistry, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Japan
| | - Tatsuo Yamamoto
- Department of Disaster Medicine and Dental Sociology, Graduate School of Dentistry, Kanagawa Dental University, Japan
| | - Koji Inagaki
- Department of Dental Hygiene, Aichi Gakuin Junior College, Japan
| | - Pao-Li Wang
- Department of Dental Education Innovation, Osaka Dental University, Japan
| | - Hiroshi Ito
- Department of Periodontology, The Nippon Dental University School of Life Dentistry at Tokyo, Japan
| | - Toshiya Morozumi
- Division of Periodontology, Department of Oral Interdisciplinary Medicine, Kanagawa Dental University Graduate School of Dentistry, Japan
| | - Toru Takeshita
- Section of Preventive and Public Health Dentistry, Division of Oral Health, Growth and Development, Faculty of Dental Science, Kyushu University, Japan
| | - Nao Suzuki
- Department of Preventive and Public Health Dentistry, Fukuoka Dental College, Japan
| | - Hideo Shigeishi
- Department of Public Oral Health, Program of Oral Health Sciences, Graduate School of Biomedical & Health Sciences, Hiroshima University, Japan
| | - Masaru Sugiyama
- Department of Public Oral Health, Program of Oral Health Sciences, Graduate School of Biomedical & Health Sciences, Hiroshima University, Japan
| | - Kouji Ohta
- Department of Oral & Maxillofacial Surgery, Graduate School of Biomedical & Health Sciences, Hiroshima University, Japan
| | - Toru Nagao
- Department of Maxillofacial Surgery, School of Dentistry, Aichi-Gakuin University, Japan
| | - Nobuhiro Hanada
- Department of Translational Research, Tsurumi University School of Dental Medicine, Japan
| | - Miki Ojima
- Department of Oral Health Sciences, Faculty of Nursing and Health Care, BAIKA Women's University, Japan
| | - Hiroshi Ogawa
- Division of Preventive Dentistry, Department of Oral Health Science, Graduate School of Medical and Dental Sciences, and WHO Collaborating Center for Translation of Oral Health Science, Niigata University, Japan
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45
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Hajishengallis G, Kajikawa T, Hajishengallis E, Maekawa T, Reis ES, Mastellos DC, Yancopoulou D, Hasturk H, Lambris JD. Complement-Dependent Mechanisms and Interventions in Periodontal Disease. Front Immunol 2019; 10:406. [PMID: 30915073 PMCID: PMC6422998 DOI: 10.3389/fimmu.2019.00406] [Citation(s) in RCA: 54] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2018] [Accepted: 02/15/2019] [Indexed: 12/20/2022] Open
Abstract
Periodontitis is a prevalent inflammatory disease that leads to the destruction of the tooth-supporting tissues. Current therapies are not effective for all patients and this oral disease continues to be a significant public health and economic burden. Central to periodontal disease pathogenesis is a reciprocally reinforced interplay between microbial dysbiosis and destructive inflammation, suggesting the potential relevance of host-modulation therapies. This review summarizes and discusses clinical observations and pre-clinical intervention studies that collectively suggest that complement is hyperactivated in periodontitis and that its inhibition provides a therapeutic benefit. Specifically, interception of the complement cascade at its central component, C3, using a locally administered small peptidic compound (Cp40/AMY-101) protected non-human primates from induced or naturally occurring periodontitis. These studies indicate that C3-targeted intervention merits investigation as an adjunctive treatment of periodontal disease in humans.
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Affiliation(s)
- George Hajishengallis
- Department of Microbiology, Penn Dental Medicine, University of Pennsylvania, Philadelphia, PA, United States
| | - Tetsuhiro Kajikawa
- Department of Microbiology, Penn Dental Medicine, University of Pennsylvania, Philadelphia, PA, United States
| | - Evlambia Hajishengallis
- Division of Pediatric Dentistry, Department of Preventive and Restorative Sciences, Penn Dental Medicine, University of Pennsylvania, Philadelphia, PA, United States
| | - Tomoki Maekawa
- Research Center for Advanced Oral Science, Graduate School of Medical and Dental Sciences, Niigata University, Niigata, Japan
| | - Edimara S Reis
- Department of Pathology and Laboratory Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, United States
| | - Dimitrios C Mastellos
- Division of Biodiagnostic Sciences and Technologies, National Center for Scientific Research "Demokritos", Athens, Greece
| | | | - Hatice Hasturk
- Center for Clinical and Translational Research, Forsyth Institute, Cambridge, MA, United States
| | - John D Lambris
- Department of Pathology and Laboratory Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, United States
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46
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Cornejo Ulloa P, van der Veen MH, Krom BP. Review: modulation of the oral microbiome by the host to promote ecological balance. Odontology 2019; 107:437-448. [PMID: 30719639 PMCID: PMC6732124 DOI: 10.1007/s10266-019-00413-x] [Citation(s) in RCA: 43] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2018] [Accepted: 01/23/2019] [Indexed: 01/05/2023]
Abstract
The indivisible relationship between the human host and its oral microbiome has been shaped throughout the millennia, by facing various changes that have forced the adaptation of oral microorganisms to new environmental conditions. In this constant crosstalk between the human host and its microbiome, a bidirectional relationship has been established. The microorganisms provide the host with functions it cannot perform on its own and at the same time the host provides its microbes with a suitable environment for their growth and development. These host factors can positively affect the microbiome, promoting diversity and balance between different species, resulting in a state of symbiosis and absence of pathology. In contrast, other host factors can negatively influence the composition of the oral microbiome and drive the interaction towards a dysbiotic state, where the balance tilts towards a harmful relationship between the host and its microbiome. The aim of this review is to describe the role host factors play in cultivating and maintaining a healthy oral ecology and discuss mechanisms that can prevent its drift towards dysbiosis.
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Affiliation(s)
- Pilar Cornejo Ulloa
- Department of Preventive Dentistry, Academic Centre for Dentistry Amsterdam (ACTA), University of Amsterdam and VU University Amsterdam, G. Mahlerlaan 3004, 1081 LA, Amsterdam, The Netherlands
| | - Monique H van der Veen
- Department of Preventive Dentistry, Academic Centre for Dentistry Amsterdam (ACTA), University of Amsterdam and VU University Amsterdam, G. Mahlerlaan 3004, 1081 LA, Amsterdam, The Netherlands.
| | - Bastiaan P Krom
- Department of Preventive Dentistry, Academic Centre for Dentistry Amsterdam (ACTA), University of Amsterdam and VU University Amsterdam, G. Mahlerlaan 3004, 1081 LA, Amsterdam, The Netherlands.
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47
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Chattopadhyay I, Verma M, Panda M. Role of Oral Microbiome Signatures in Diagnosis and Prognosis of Oral Cancer. Technol Cancer Res Treat 2019; 18:1533033819867354. [PMID: 31370775 PMCID: PMC6676258 DOI: 10.1177/1533033819867354] [Citation(s) in RCA: 199] [Impact Index Per Article: 39.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2019] [Revised: 06/15/2019] [Accepted: 06/27/2019] [Indexed: 12/11/2022] Open
Abstract
Despite advancement in cancer treatment, oral cancer has a poor prognosis and is often detected at late stage. To overcome these challenges, investigators should search for early diagnostic and prognostic biomarkers. More than 700 bacterial species reside in the oral cavity. The oral microbiome population varies by saliva and different habitats of oral cavity. Tobacco, alcohol, and betel nut, which are causative factors of oral cancer, may alter the oral microbiome composition. Both pathogenic and commensal strains of bacteria have significantly contributed to oral cancer. Numerous bacterial species in the oral cavity are involved in chronic inflammation that lead to development of oral carcinogenesis. Bacterial products and its metabolic by-products may induce permanent genetic alterations in epithelial cells of the host that drive proliferation and/or survival of epithelial cells. Porphyromonas gingivalis and Fusobacterium nucleatum induce production of inflammatory cytokines, cell proliferation, and inhibition of apoptosis, cellular invasion, and migration thorough host cell genomic alterations. Recent advancement in metagenomic technologies may be useful in identifying oral cancer-related microbiome, their genomes, virulence properties, and their interaction with host immunity. It is very important to address which bacterial species is responsible for driving oral carcinogenesis. Alteration in the oral commensal microbial communities have potential application as a diagnostic tool to predict oral squamous cell carcinoma. Clinicians should be aware that the protective properties of the resident microflora are beneficial to define treatment strategies. To develop highly precise and effective therapeutic approaches, identification of specific oral microbiomes may be required. In this review, we narrate the role of microbiome in the progression of oral cancer and its role as an early diagnostic and prognostic biomarker for oral cancer.
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Affiliation(s)
- Indranil Chattopadhyay
- Department of Life Sciences, Central University of Tamil Nadu, Thiruvarur, Tamil Nadu, India
| | - Mukesh Verma
- Epidemiology and Genomics Research Program, Division of Cancer Control and Population Sciences, National Cancer Institute, National Institutes of Health, Rockville, MD, USA
| | - Madhusmita Panda
- Department of Life Sciences, Central University of Tamil Nadu, Thiruvarur, Tamil Nadu, India
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48
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Ryder MI, Couch ET, Chaffee BW. Personalized periodontal treatment for the tobacco- and alcohol-using patient. Periodontol 2000 2018; 78:30-46. [PMID: 30198132 PMCID: PMC6132065 DOI: 10.1111/prd.12229] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
The use of various forms of tobacco is one of the most important preventable risk factors for the incidence and progression of periodontal disease. Tobacco use negatively affects treatment outcomes for both periodontal diseases and conditions, and for dental implants. Tobacco-cessation programs can mitigate these adverse dental treatment outcomes and may be the most effective component of a personalized periodontal treatment approach. In addition, heavy alcohol consumption may exacerbate the adverse effects of tobacco use. In this review, the microbiology, host/inflammatory responses and genetic characteristics of the tobacco-using patient are presented as a framework to aid the practitioner in developing personalized treatment strategies for these patients. These personalized approaches can be used for patients who use a variety of tobacco products, including cigarettes, cigars, pipes, smokeless tobacco products, e-cigarettes and other tobacco forms, as well as patients who consume large amounts of alcohol. In addition, principles for developing personalized tobacco-cessation programs, using both traditional and newer motivational and pharmacological approaches, are presented.
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Affiliation(s)
- Mark I Ryder
- Department of Orofacial Sciences, School of Dentistry, University of California, San Francisco, CA, USA
| | - Elizabeth T Couch
- Department or Preventive and Restorative Sciences, School of Dentistry, University of California, San Francisco, CA, USA
| | - Benjamin W Chaffee
- Department or Preventive and Restorative Sciences, School of Dentistry, University of California, San Francisco, CA, USA
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49
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Buduneli N, Scott DA. Tobacco-induced suppression of the vascular response to dental plaque. Mol Oral Microbiol 2018; 33:271-282. [PMID: 29768735 PMCID: PMC8246627 DOI: 10.1111/omi.12228] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/02/2018] [Indexed: 12/26/2022]
Abstract
Cigarette smoking presents oral health professionals with a clinical and research conundrum: reduced periodontal vascular responsiveness to the oral biofilm accompanied by increased susceptibility to destructive periodontal diseases. This presents a significant problem, hampering diagnosis and complicating treatment planning. The aim of this review is to summarize contemporary hypotheses that help to explain mechanistically the phenomenon of a suppressed bleeding response to dysbiotic plaque in the periodontia of smokers. The influence of smoke exposure on angiogenesis, innate cell function, the production of inflammatory mediators including cytokines and proteases, tobacco-bacteria interactions, and potential genetic predisposition are discussed.
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Affiliation(s)
| | - David A. Scott
- Department of Oral Immunology and Infectious Diseases, School of Dentistry, University of Louisville, Louisville, KY, USA
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50
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Vallès Y, Inman CK, Peters BA, Ali R, Wareth LA, Abdulle A, Alsafar H, Anouti FA, Dhaheri AA, Galani D, Haji M, Hamiz AA, Hosani AA, Houqani MA, Junaibi AA, Kazim M, Kirchhoff T, Mahmeed WA, Maskari FA, Alnaeemi A, Oumeziane N, Ramasamy R, Schmidt AM, Weitzman M, Zaabi EA, Sherman S, Hayes RB, Ahn J. Types of tobacco consumption and the oral microbiome in the United Arab Emirates Healthy Future (UAEHFS) Pilot Study. Sci Rep 2018; 8:11327. [PMID: 30054546 PMCID: PMC6063860 DOI: 10.1038/s41598-018-29730-x] [Citation(s) in RCA: 42] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2017] [Accepted: 06/27/2018] [Indexed: 12/19/2022] Open
Abstract
Cigarette smoking alters the oral microbiome; however, the effect of alternative tobacco products remains unclear. Middle Eastern tobacco products like dokha and shisha, are becoming globally widespread. We tested for the first time in a Middle Eastern population the hypothesis that different tobacco products impact the oral microbiome. The oral microbiome of 330 subjects from the United Arab Emirates Healthy Future Study was assessed by amplifying the bacterial 16S rRNA gene from mouthwash samples. Tobacco consumption was assessed using a structured questionnaire and further validated by urine cotinine levels. Oral microbiome overall structure and specific taxon abundances were compared, using PERMANOVA and DESeq analyses respectively. Our results show that overall microbial composition differs between smokers and nonsmokers (p = 0.0001). Use of cigarettes (p = 0.001) and dokha (p = 0.042) were associated with overall microbiome structure, while shisha use was not (p = 0.62). The abundance of multiple genera were significantly altered (enriched/depleted) in cigarette smokers; however, only Actinobacillus, Porphyromonas, Lautropia and Bifidobacterium abundances were significantly changed in dokha users whereas no genera were significantly altered in shisha smokers. For the first time, we show that smoking dokha is associated to oral microbiome dysbiosis, suggesting that it could have similar effects as smoking cigarettes on oral health.
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Affiliation(s)
- Yvonne Vallès
- Public Health Research Center, New York University Abu Dhabi, Abu Dhabi, UAE
| | - Claire K Inman
- Public Health Research Center, New York University Abu Dhabi, Abu Dhabi, UAE
| | - Brandilyn A Peters
- Department of Population Health, New York University School of Medicine, New York, USA
| | - Raghib Ali
- Public Health Research Center, New York University Abu Dhabi, Abu Dhabi, UAE
| | - Laila Abdel Wareth
- Pathology and Laboratory Medicine Institute, Cleveland Clinic, Abu Dhabi, UAE
| | - Abdishakur Abdulle
- Public Health Research Center, New York University Abu Dhabi, Abu Dhabi, UAE
| | - Habiba Alsafar
- Center for Biotechnology, Khalifa University of Science and Technology, Abu Dhabi, UAE.,Biomedical Engineering Department, Khalifa University of Science and Technology, Abu Dhabi, UAE
| | - Fatme Al Anouti
- College of Natural and Health Sciences, Zayed University, Abu Dhabi, UAE
| | - Ayesha Al Dhaheri
- Department of Nutrition, College of Food and Agriculture; UAE University, Al-Ain, UAE
| | - Divya Galani
- Public Health Research Center, New York University Abu Dhabi, Abu Dhabi, UAE
| | - Muna Haji
- Public Health Research Center, New York University Abu Dhabi, Abu Dhabi, UAE
| | - Aisha Al Hamiz
- Public Health Research Center, New York University Abu Dhabi, Abu Dhabi, UAE
| | - Ayesha Al Hosani
- Public Health Research Center, New York University Abu Dhabi, Abu Dhabi, UAE
| | - Mohammed Al Houqani
- Department of Medicine, College of Medicine and Health Sciences, UAE University, Al-Ain, UAE
| | | | - Marina Kazim
- Department of Pathology, Sheikh Khalifa Medical City, Abu Dhabi, UAE
| | - Tomas Kirchhoff
- Department of Population Health, New York University School of Medicine, New York, USA
| | - Wael Al Mahmeed
- Heart and Vascular Institute, Cleveland Clinic, Abu Dhabi, UAE
| | - Fatma Al Maskari
- Institute of Public Health, College of Medicine and Health Sciences, UAE University, Al-Ain, UAE
| | | | | | - Ravichandran Ramasamy
- Diabetes Research Program, Division of Endocrinology, Diabetes and Metabolism, Department of Medicine, New York University School of Medicine, New York, USA
| | - Ann Marie Schmidt
- Diabetes Research Program, Division of Endocrinology, Diabetes and Metabolism, Department of Medicine, New York University School of Medicine, New York, USA
| | - Michael Weitzman
- Public Health Research Center, New York University Abu Dhabi, Abu Dhabi, UAE.,Department of Environmental Medicine, New York University School of Medicine, New York, USA.,Department of Pediatrics, New York University School of Medicine, New York, USA
| | - Eiman Al Zaabi
- Department of Pathology, Sheikh Khalifa Medical City, Abu Dhabi, UAE
| | - Scott Sherman
- Public Health Research Center, New York University Abu Dhabi, Abu Dhabi, UAE.,Department of Population Health, New York University School of Medicine, New York, USA
| | - Richard B Hayes
- Department of Population Health, New York University School of Medicine, New York, USA.,NYU Perlmutter Cancer Center, New York, USA
| | - Jiyoung Ahn
- Department of Population Health, New York University School of Medicine, New York, USA. .,NYU Perlmutter Cancer Center, New York, USA.
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