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Divnic-Resnik T, Pradhan H, Spahr A. The efficacy of the adjunct use of subgingival air-polishing therapy with erythritol powder compared to conventional debridement alone during initial non-surgical periodontal therapy. J Clin Periodontol 2022; 49:547-555. [PMID: 35373340 PMCID: PMC9321595 DOI: 10.1111/jcpe.13623] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2021] [Revised: 01/19/2022] [Accepted: 03/24/2022] [Indexed: 01/12/2023]
Abstract
Aim To assess the efficacy of the adjunct use of a subgingival erythritol powder air‐polishing device (EPAP) in comparison to conventional subgingival instrumentation alone during initial non‐surgical periodontal therapy. Materials and Methods Twenty‐one patients with generalized Stages 2 and 3 grade B periodontitis were included in this single centre, single blinded, split‐mouth, randomized clinical trial. Teeth on the control side were treated with conventional hand and ultrasonic instrumentation, while those on the contralateral test side was treated using EPAP as adjunct to conventional subgingival instrumentation with hand and ultrasonic instruments. Three months after initial instrumentation, persisting pockets of ≥4 mm were re‐treated, in both control and test sides, again with the respective treatment approach—subgingival instrumentation alone on control, and subgingival instrumentation + EPAP on test side. Clinical parameters such as probing pocket depth (PPD), bleeding on probing, and relative attachment level were recorded at baseline and 3 and 6 months following the initial instrumentation. Subgingival plaque samples were collected at baseline, immediately post surgery, as well as at 1 week, 1 month, 3 months, and 6 months after initial instrumentation. Results In the test group after 6 months, a significantly larger number of initially deep pockets (PPD ≥ 5.5 mm) were reduced to shallow (PPD ≤ 3.4 mm), and a larger attachment gain was observed. No statistically significant microbiological differences could be found between test and control group. Conclusions The results of the present study indicate that the adjunct use of subgingival airflow therapy with EPAP during initial non‐surgical periodontal therapy might be beneficial in initially deep pockets (PPD ≥ 5.5 mm).
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Affiliation(s)
- Tihana Divnic-Resnik
- Discipline of Periodontics, School of Dentistry, Faculty of Medicine and Health, The University of Sydney, Sydney, New South Wales, Australia
| | - Harold Pradhan
- Discipline of Periodontics, School of Dentistry, Faculty of Medicine and Health, The University of Sydney, Sydney, New South Wales, Australia
| | - Axel Spahr
- Discipline of Periodontics, School of Dentistry, Faculty of Medicine and Health, The University of Sydney, Sydney, New South Wales, Australia
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Bashir NZ, Singh HA, Virdee SS. Indocyanine green-mediated antimicrobial photodynamic therapy as an adjunct to periodontal therapy: a systematic review and meta-analysis. Clin Oral Investig 2021; 25:5699-5710. [PMID: 33710461 PMCID: PMC8443506 DOI: 10.1007/s00784-021-03871-2] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2020] [Accepted: 03/03/2021] [Indexed: 11/06/2022]
Abstract
OBJECTIVES The aim of this systematic review and meta-analysis was to evaluate the efficacy of indocyanine green-mediated photodynamic therapy (ICG-PDT) as an adjunct to non-surgical periodontal therapy (NSPT), in the management of chronic periodontitis. MATERIALS AND METHODS Four electronic databases (PubMed, Cochrane Central Register of Controlled Trials, Embase via OVID, Web of Science) were searched for randomised controlled trials comparing NSPT with ICG-PDT to NSPT without laser therapy. Primary outcome measures were changes in probing pocket depth (PPD) and clinical attachment level (CAL). Clinical outcomes were extracted and pooled from 7 eligible trials and meta-analyses conducted using mean difference with standard deviations. RESULTS For PPD, adjunctive ICG-PDT resulted in a mean additional reduction of 1.17 mm (95% CI: 0.67-1.66 mm) at 3 months and a mean additional reduction of 1.06 mm (95% CI: 0.54-1.57 mm) at 6 months. For CAL, adjunctive ICG-PDT resulted in a mean additional gain of 0.70 mm (95% CI: 0.17-1.23 mm) at 3 months and a mean additional gain of 1.03 mm (95% CI: 0.83-1.24 mm) at 6 months. No adverse events were reported in any studies. CONCLUSIONS The adjunctive use of ICG-PDT in NSPT results in improved treatment outcomes at 3 and 6 months post-therapy. Further investigation is needed to evaluate variables such as different photosensitiser concentrations and adjusting parameters associated with the light source. CLINICAL RELEVANCE Indocyanine green-based photosensitisers may be a novel, clinically efficacious agent for use in the management of periodontitis.
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Affiliation(s)
- Nasir Zeeshan Bashir
- School of Dentistry, University of Birmingham, Edgbaston, Birmingham, B5 7SA, UK.
| | - Har-Amrit Singh
- School of Dentistry, University of Birmingham, Edgbaston, Birmingham, B5 7SA, UK
| | - Satnam Singh Virdee
- School of Dentistry, University of Birmingham, Edgbaston, Birmingham, B5 7SA, UK
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Urmi AS, Inaba H, Nomura R, Yoshida S, Ohara N, Asai F, Nakano K, Matsumoto-Nakano M. Roles of Porphyromonas gulae proteases in bacterial and host cell biology. Cell Microbiol 2021; 23:e13312. [PMID: 33486854 DOI: 10.1111/cmi.13312] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2020] [Revised: 01/19/2021] [Accepted: 01/20/2021] [Indexed: 01/19/2023]
Abstract
Porphyromonas gulae, an animal-derived periodontal pathogen, expresses several virulence factors, including fimbria, lipopolysaccharide (LPS) and proteases. We previously reported that its invasive efficiency was dependent on fimbriae types. In addition, P. gulae LPS increased inflammatory responses via toll-like receptors. The present study was conducted to investigate the involvement of P. gulae proteases in bacterial and host cell biology. Porphyromonas gulae strains showed an ability to agglutinate mouse erythrocytes and also demonstrated co-aggregation with Actinomyces viscosus, while the protease inhibitors antipain, PMSF, TLCK and leupeptin diminished P. gulae proteolytic activity, resulting in inhibition of haemagglutination and co-aggregation with A. viscosus. In addition, specific proteinase inhibitors were found to reduce bacterial cell growth. Porphyromonas gulae inhibited Ca9-22 cell proliferation in a multiplicity of infection- and time-dependent manner. Additionally, P. gulae-induced decreases in cell contact and adhesion-related proteins were accompanied by a marked change in cell morphology from well spread to rounded. In contrast, inhibition of protease activity prevented degradation of proteins, such as E-cadherin, β-catenin and focal adhesion kinase, and also blocked inhibition of cell proliferation. Together, these results indicate suppression of the amount of human proteins, such as γ-globulin, fibrinogen and fibronectin, by P. gulae proteases, suggesting that a novel protease complex contributes to bacterial virulence.
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Affiliation(s)
- Alam Saki Urmi
- Department of Pediatric Dentistry, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan
| | - Hiroaki Inaba
- Department of Pediatric Dentistry, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan
| | - Ryota Nomura
- Department of Pediatric Dentistry, Osaka University Graduate School of Dentistry, Suita-Osaka, Japan
| | - Sho Yoshida
- Department of Pediatric Dentistry, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan
| | - Naoya Ohara
- Department of Oral Microbiology, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences and the Advanced Research Center for Oral and Craniofacial Sciences, Dental School, Okayama University, Okayama, Japan
| | - Fumitoshi Asai
- Department of Pharmacology, School of Veterinary Medicine, Azabu University, Sagamihara, Japan
| | - Kazuhiko Nakano
- Department of Pediatric Dentistry, Osaka University Graduate School of Dentistry, Suita-Osaka, Japan
| | - Michiyo Matsumoto-Nakano
- Department of Pediatric Dentistry, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan
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Rusu D, Stratul SI, Calniceanu H, Boariu M, Ogodescu A, Milicescu S, Didilescu A, Roman A, Surlin P, Locovei C, Chiperi M, Solomon S, Nica L. A qualitative and semiquantitative SEM study of the morphology of the biofilm on root surfaces of human teeth with endodontic-periodontal lesions. Exp Ther Med 2020; 20:201. [PMID: 33133249 PMCID: PMC7593830 DOI: 10.3892/etm.2020.9331] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2020] [Accepted: 08/17/2020] [Indexed: 11/17/2022] Open
Abstract
Over the last decades, scanning electron microscopy (SEM) proved to be invaluable for ultrastructural investigation, allowing imaging of the overall appearance and/or specific features of oral biofilms, e.g., microbial colonies and individual cells, glycocalyx, the presence of inorganic products. The aim of this study was the observation and evaluation of the morphology of the biofilm of endodontic-periodontal lesions (EPL) with a modified protocol involving a simplified histologic sample preparation and a low-vacuum SEM examination method. Twenty-one teeth with endodontic-periodontal involvement, extracted for periodontal reasons, were carefully washed with saline, underwent fixation in modified Karnovsky solution and were dehydrated in alcohol series. Samples were examined under low-vacuum SEM. Radicular surfaces were evaluated qualitatively and semiquantitatively for several characteristics, including the presence of bacterial types, the biofilm morphology and the content of root resorptions. Radicular surfaces were divided in four conventional zones Surfaces were evaluated for several characteristics: Presence of bacterial types, biofilm morphology, presence of root resorptions. High-quality images, relevant for endodontic-periodontal biofilms were collected. Continuous, established biofilm was found on all examined surfaces, its detection varying from 19% of the samples on the wall of cemental cone to 52.3% on the radicular surface of the periodontal pocket. Observed microorganisms included cocci, rods an filaments. Spirils and motile bacteria were only accidentally found. SEM investigation of surfaces involved in EPL revealed less surfaces covered by mature biofilm (in only 28.5% of the samples in the ‘transition zone’), especially rods and filaments associated with cemental resorptions and calculus. Biofilm elements were better represented in periodontal pockets than in other zones of EPL (detected in up to 81% of the samples). A strong correlation between mature biofilm and the presence of cocci appears on all investigated zones (P<0.01). Microbiota appeared to be morphologically similar in apical and periodontal areas, especially in old EPL.
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Affiliation(s)
- Darian Rusu
- Department of Periodontology, 'Victor Babes' University of Medicine and Pharmacy, 300041 Timisoara, Romania
| | - Stefan-Ioan Stratul
- Department of Periodontology, 'Victor Babes' University of Medicine and Pharmacy, 300041 Timisoara, Romania
| | - Horia Calniceanu
- Department of Periodontology, 'Victor Babes' University of Medicine and Pharmacy, 300041 Timisoara, Romania
| | - Marius Boariu
- Department of Endodontics, 'Victor Babes' University of Medicine and Pharmacy, 300041 Timisoara, Romania
| | - Alexandru Ogodescu
- Department of Pedodontics, 'Victor Babes' University of Medicine and Pharmacy, 300041 Timisoara, Romania
| | - Stefan Milicescu
- Department of Prosthodontics, 'Carol Davila' University of Medicine and Pharmacy, 020021 Bucharest, Romania
| | - Andreea Didilescu
- Department of Embryology, 'Carol Davila' University of Medicine and Pharmacy, 020021 Bucharest, Romania
| | - Alexandra Roman
- Department of Periodontology, 'Iuliu Hatieganu' University of Medicine and Pharmacy, 400000 Cluj-Napoca, Romania
| | - Petra Surlin
- Department of Periodontology, University of Craiova, 200349 Craiova, Romania
| | - Cosmin Locovei
- Department of Materials and Manufacturing Engineering, Politehnica University of Timisoara, Timisoara 300006, Romania
| | | | - Sorina Solomon
- Department of Periodontology, 'Grigore T. Popa University of Medicine and Pharmacy, 700020 Iasi, Romania
| | - Luminita Nica
- Department of Endodontics, 'Victor Babes' University of Medicine and Pharmacy, 300041 Timisoara, Romania
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Cruz Olivo EA, Santos D, de Lima ME, Dos Santos VL, Sinisterra RD, Cortés ME. Antibacterial Effect of Synthetic Peptide LyeTxI and LyeTxI/β-Cyclodextrin Association Compound Against Planktonic and Multispecies Biofilms of Periodontal Pathogens. J Periodontol 2016; 88:e88-e96. [PMID: 27989223 DOI: 10.1902/jop.2016.160438] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
BACKGROUND Antimicrobial peptides (AMPs) have shown rapid and potent effect against planktonic bacteria. However, control of periodontopathic biofilms is a challenge even for AMPs. Thus, the present study evaluates in vitro antimicrobial activity of synthetic peptide LyeTxI and association compound LyeTxI/β-cyclodextrin (βCD) against multispecies biofilms. METHODS Sensibility to LyeTxI and LyeTxI/βCD was determined for planktonic Gram-negative periodontopathogens. Time-kill kinetic assay was performed at minimum inhibitory concentrations (MICs) in all planktonic strains. Multispecies biofilms were grown on pegs using a biofilm device and studied by scanning electron microscopy at 2, 5, and 10 days. Minimal biofilm eradication concentration (MBEC) was determined for 2- and 4-day multispecies biofilms. Metabolic activity of biofilms was determined by fluorometry study. RESULTS Biofilms showed reproducible cell density on pegs of the biofilm device. LyeTxI and LyeTxI/βCD were active against all strains tested at concentrations ≤62.5 μg/mL. Kinetic assays showed rapid bactericidal effect of LyeTxI against all periodontopathogens. MBECs of LyeTxI and LyeTxI/βCD against multispecies 2-day biofilms were two-fold higher than MICs of cells shed from biofilms. LyeTxI was able to reduce multispecies 2-day metabolic activity by 90%. Multispecies 4-day biofilms were tolerant to all agents tested. CONCLUSIONS LyeTxI and LyeTxI/βCD are active against periodontopathic bacteria, showing rapid bactericidal effect and may be used to prevent biofilm development. In the future, AMPs could be therapeutic tools for treatment of periodontitis.
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Affiliation(s)
- Edison Andrés Cruz Olivo
- Department of Periodontology, Faculty of Dentistry, Federal University of Minas Gerais, Belo Horizonte, Brazil
| | - Daniel Santos
- Department of Biochemistry and Immunology, Institute of Biological Sciences, Federal University of Minas Gerais
| | - Maria Elena de Lima
- Department of Biochemistry and Immunology, Institute of Biological Sciences, Federal University of Minas Gerais
| | - Vera Lúcia Dos Santos
- Department of Microbiology, Institute of Biological Sciences, Federal University of Minas Gerais
| | - Rubén Dario Sinisterra
- Department of Inorganic Chemistry, Exacts Science Institute, Federal University of Minas Gerais
| | - María Esperanza Cortés
- Department of Restorative Dentistry, Faculty of Dentistry, Federal University of Minas Gerais
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Identification of subgingival periodontal pathogens and association with the severity of periodontitis in patients with chronic kidney diseases: a cross-sectional study. BIOMED RESEARCH INTERNATIONAL 2015; 2015:370314. [PMID: 25922833 PMCID: PMC4398940 DOI: 10.1155/2015/370314] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 02/08/2015] [Revised: 03/22/2015] [Accepted: 03/24/2015] [Indexed: 11/17/2022]
Abstract
BACKGROUND The aim of our study was to assess the subgingival profile of 9 periodontal pathogens, by means of real-time PCR, in a group of predialysis chronic kidney disease patients with and without periodontal disease and to identify the risk factors associated with periodontal disease in these patients. MATERIAL AND METHODS This is a single centre cross-sectional cohort study performed on 70 CKD patients. Patients received a full-mouth periodontal examination and the following parameters were assessed: periodontal pocket depth (PPD), clinical attachment level, bleeding on probing, and plaque index; subgingival biofilm samples were collected from the deepest periodontal pocket of each quadrant and were pooled in one transporting unit. Clinical data were drawn from the medical file of the patients. RESULTS T. denticola (P = 0.001), T. forsythia (P < 0.001), and P. micros (P = 0.003) are significantly associated with periodontal disease in CKD subjects but in a multivariate model only age and T. forsythia remain independent risk factors for periodontal disease in patients with CKD. CONCLUSIONS In our cohort, age and T. forsythia are independently associated with periodontitis in CKD patients. Within the limits of this study, CKD was not significantly associated with a particular subgingival periodontal pathogens profile in periodontitis patients.
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Teles R, Teles F, Frias-Lopez J, Paster B, Haffajee A. Lessons learned and unlearned in periodontal microbiology. Periodontol 2000 2014; 62:95-162. [PMID: 23574465 PMCID: PMC3912758 DOI: 10.1111/prd.12010] [Citation(s) in RCA: 233] [Impact Index Per Article: 23.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
Periodontal diseases are initiated by bacterial species living in polymicrobial biofilms at or below the gingival margin and progress largely as a result of the inflammation elicited by specific subgingival species. In the past few decades, efforts to understand the periodontal microbiota have led to an exponential increase in information about biofilms associated with periodontal health and disease. In fact, the oral microbiota is one of the best-characterized microbiomes that colonize the human body. Despite this increased knowledge, one has to ask if our fundamental concepts of the etiology and pathogenesis of periodontal diseases have really changed. In this article we will review how our comprehension of the structure and function of the subgingival microbiota has evolved over the years in search of lessons learned and unlearned in periodontal microbiology. More specifically, this review focuses on: (i) how the data obtained through molecular techniques have impacted our knowledge of the etiology of periodontal infections; (ii) the potential role of viruses in the etiopathogenesis of periodontal diseases; (iii) how concepts of microbial ecology have expanded our understanding of host-microbe interactions that might lead to periodontal diseases; (iv) the role of inflammation in the pathogenesis of periodontal diseases; and (v) the impact of these evolving concepts on therapeutic and preventive strategies to periodontal infections. We will conclude by reviewing how novel systems-biology approaches promise to unravel new details of the pathogenesis of periodontal diseases and hopefully lead to a better understanding of their mechanisms.
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Asahi Y, Noiri Y, Igarashi J, Suga H, Azakami H, Ebisu S. Synergistic effects of antibiotics and an N-acyl homoserine lactone analog on Porphyromonas gingivalis biofilms. J Appl Microbiol 2011; 112:404-11. [PMID: 22093286 DOI: 10.1111/j.1365-2672.2011.05194.x] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
AIMS To investigate the effects of the combined application of an N-acyl homoserine lactone (HSL) analog and antibiotics on biofilms of Porphyromonas gingivalis, a major pathogen of periodontal disease. METHODS AND RESULTS Antibiotics used were cefuroxime, ofloxacin and minocycline. A flow-cell model was used for biofilm formation. Samples were divided into four groups: control, analog-treated, antibiotic-treated and combined application groups. Biofilm cell survival was determined using adenosine triphosphate (ATP) bioluminescence and confocal laser microscopy (CLSM). In the combined application group, the ATP count in biofilm cells was significantly decreased compared with the antibiotic-treated group (Games-Howell test, P < 0·05). A combination of cefuroxime and the analog was most effective against the P. gingivalis biofilm. CLSM observations revealed that the proportion of dead cells was highest in the combined application group. CONCLUSIONS The combined application of the N-acyl HSL analog and antibiotics was effective at reducing the viability of P. gingivalis cells in biofilms. SIGNIFICANCE AND IMPACT OF THE STUDY The combined application of the N-acyl HSL analog and antibiotics may be successful for eradicating infections involving bacterial biofilms, such as periodontitis.
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Affiliation(s)
- Y Asahi
- Department of Restorative Dentistry and Endodontology, Osaka University Graduate School of Dentistry, Osaka, Japan
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Photodynamic therapy in the treatment of chronic periodontitis: a systematic review and meta-analysis. Lasers Med Sci 2011; 28:669-82. [DOI: 10.1007/s10103-011-1002-2] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2011] [Accepted: 09/20/2011] [Indexed: 12/14/2022]
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Sgolastra F, Petrucci A, Gatto R, Marzo G, Monaco A. Photodynamic therapy in the treatment of chronic periodontitis: a systematic review and meta-analysis. Lasers Med Sci 2011; 28:1393-402. [PMID: 22002328 DOI: 10.1007/s10103-012-1181-5] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2012] [Accepted: 07/30/2012] [Indexed: 12/14/2022]
Abstract
This meta-analysis was conducted to investigate the efficacy and safety of antimicrobial photodynamic therapy used alone or adjunctive to scaling root planing in patients with chronic periodontitis. The meta-analysis was conducted according to the QUOROM statement and recommendations of the Cochrane Collaboration. An extensive literature search was performed on seven databases, followed by a manual search. Weighted mean differences and 95% confidence intervals were calculated for clinical attachment level, probing depth and gingival recession. The I(2) test was used for inter-study heterogeneity; visual asymmetry inspection of the funnel plot, Egger's regression test and the trim-and-fill method were used to investigate publication bias. At 3 months, significant differences in clinical attachment level (p = 0.006) and probing depth reduction (p = 0.02) were observed for scaling root planing with antimicrobial photodynamic therapy, while no significant differences were retrieved for antimicrobial photodynamic therapy used alone; at 6 months no significant differences were observed for any investigated outcome. Neither heterogeneity nor publication bias was detected. The use of antimicrobial photodynamic therapy adjunctive to conventional treatment provides short-term benefits, but microbiological outcomes are contradictory. There is no evidence of effectiveness for the use of antimicrobial photodynamic therapy as alternative to scaling root planing. Long-term randomized controlled clinical trials reporting data on microbiological changes and costs are needed to support the long-term efficacy of adjunctive antimicrobial photodynamic therapy and the reliability of antimicrobial photodynamic therapy as alternative treatment to scaling root planing.
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Affiliation(s)
- Fabrizio Sgolastra
- Department of Health Sciences, University of L'Aquila, San Salvatore 1, Building Delta 6, 67100, L'Aquila, Italy.
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Gauthier S, Tétu A, Himaya E, Morand M, Chandad F, Rallu F, Bujold E. The origin of Fusobacterium nucleatum involved in intra-amniotic infection and preterm birth. J Matern Fetal Neonatal Med 2011; 24:1329-32. [PMID: 21314291 DOI: 10.3109/14767058.2010.550977] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
OBJECTIVE To evaluate the potential oral origin of Fusobacterium nucleatum found in amniotic fluid of women at high risk of preterm birth. METHODS A transversal study nested into a cohort study of women with preterm labor and/or preterm premature rupture of membranes was undergone. Women with the presence of F. nucleatum in the amniotic fluid and their respective partners were invited to be examined for their periodontal health after delivery, and samples of saliva and subgingival plaque were collected. For each couple, specific PCR detection of Fusobacterium species was performed on each oral sample, and the DNA sequences were compared with the one obtained from amniotic fluid. RESULTS Three women, all in preterm labor with intact membranes, were included. Intra-amniotic sludge was observed in all of them. A strain of F. nucleatum with 100% sequence identity with the strain detected in the amniotic fluid was found in the oral samples of one of them and of two partners. CONCLUSION This study suggests that intra-amniotic F. nucleatum could originate from the patient's or the partner's oral microflora.
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12
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Asahi Y, Noiri Y, Igarashi J, Asai H, Suga H, Ebisu S. Effects ofN-acyl homoserine lactone analogues onPorphyromonas gingivalisbiofilm formation. J Periodontal Res 2010; 45:255-61. [DOI: 10.1111/j.1600-0765.2009.01228.x] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Quantification of periodontal pathogens by paper point sampling from the coronal and apical aspect of periodontal lesions by real-time PCR. Clin Oral Investig 2009; 14:533-41. [DOI: 10.1007/s00784-009-0333-x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2009] [Accepted: 07/30/2009] [Indexed: 10/20/2022]
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Angelov N, Aprecio RM, Kettering J, Lundgren T, Riggs M, Egelberg J. Recovery of putative pathogens from paper point sampling at different depths of periodontal lesions. Clin Cosmet Investig Dent 2009; 1:1-5. [PMID: 23674898 PMCID: PMC3652342 DOI: 10.2147/ccide.s4737] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Background The aim of this study was to compare the recovery of three putative periodontal pathogens from periodontal lesions in samples using paper points inserted to different depths of the lesions. Methods Twenty 6–8 mm deep periodontal lesions with bleeding on probing were studied. Microbial samples were obtained using paper points inserted to three different depths of the lesions: orifice of lesion; 2 mm into the lesion; and to the base of lesion. Culturing was used for recovery and identification of Actinobacillus actinomycetemcomitans, Porphyromonas gingivalis, and Prevotella intermedia. Results The recovery of each of the three putative periodontal pathogens was similar following sampling at the various depths of the lesions. Conclusions The findings may be explained by the fact that the paper points become saturated as they pass through the orifice of the lesion. Absorption of microorganisms will therefore primarily occur at the orifice. It is also conceivable that the pathogens may be present in similar proportions throughout the various depths of the periodontal lesions.
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Affiliation(s)
- Nikola Angelov
- School of Dentistry, Loma Linda University, Loma Linda, CA, USA
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Yamaoka M, Uematsu T, Shiba T, Matsuura T, Ono Y, Ishizuka M, Naramoto H, Takahashi M, Sugiura-Tomita M, Iguchi K, Yamashita S, Furusawa K. Effect of inorganic polyphosphate in periodontitis in the elderly. Gerodontology 2008; 25:10-7. [DOI: 10.1111/j.1741-2358.2007.00185.x] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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17
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Affiliation(s)
- Ricardo P Teles
- Department of Periodontology, The Forsyth Institute, Boston, Massachusetts, USA
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Kolenbrander PE, Palmer RJ, Rickard AH, Jakubovics NS, Chalmers NI, Diaz PI. Bacterial interactions and successions during plaque development. Periodontol 2000 2006; 42:47-79. [PMID: 16930306 DOI: 10.1111/j.1600-0757.2006.00187.x] [Citation(s) in RCA: 460] [Impact Index Per Article: 25.6] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Paul E Kolenbrander
- Oral Infection and Immunity Branch, National Institutes of Dental and Craniofacial Research, National Institutes of Health, Bethesda, Maryland, USA
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Noguchi N, Noiri Y, Narimatsu M, Ebisu S. Identification and localization of extraradicular biofilm-forming bacteria associated with refractory endodontic pathogens. Appl Environ Microbiol 2006; 71:8738-43. [PMID: 16332869 PMCID: PMC1317348 DOI: 10.1128/aem.71.12.8738-8743.2005] [Citation(s) in RCA: 66] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Bacterial biofilms have been found to develop on root surfaces outside the apical foramen and be associated with refractory periapical periodontitis. However, it is unknown which bacterial species form extraradicular biofilms. The present study aimed to investigate the identity and localization of bacteria in human extraradicular biofilms. Twenty extraradicular biofilms, used to identify bacteria using a PCR-based 16S rRNA gene assay, and seven root-tips, used to observe immunohistochemical localization of three selected bacterial species, were taken from 27 patients with refractory periapical periodontitis. Bacterial DNA was detected from 14 of the 20 samples, and 113 bacterial species were isolated. Fusobacterium nucleatum (14 of 14), Porphyromonas gingivalis (12 of 14), and Tannellera forsythensis (8 of 14) were frequently detected. Unidentified and uncultured bacterial DNA was also detected in 11 of the 14 samples in which DNA was detected. In the biofilms, P. gingivalis was immunohistochemically detected in all parts of the extraradicular biofilms. Positive reactions to anti-F. nucleatum and anti-T. forsythensis sera were found at specific portions of the biofilm. These findings suggested that P. gingivalis, T. forsythensis, and F. nucleatum were associated with extraradicular biofilm formation and refractory periapical periodontitis.
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Affiliation(s)
- Nobuo Noguchi
- Department of Restorative Dentistry and Endodontology, Osaka University Graduate School of Dentistry, 1-8, Yamadaoka, Suita, Osaka 565-0871, Japan.
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Takemura N, Noiri Y, Ehara A, Kawahara T, Noguchi N, Ebisu S. Single species biofilm-forming ability of root canal isolates on gutta-percha points. Eur J Oral Sci 2005; 112:523-9. [PMID: 15560836 DOI: 10.1111/j.1600-0722.2004.00165.x] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
The participation of bacterial biofilms in the over-filled gutta-percha points associated with refractory periapical periodontitis has recently been reported. This study investigated the initial biofilm-forming ability of root canal isolates (Enterococcus faecalis, Streptococcus sanguis, Strep. intermedius, Strep. pyogenes, Staphylococcus aureus, Fusobacterium nucleatum, Propionibacterium acnes, Porphyromonas gingivalis and Prevotella intermedia) on gutta-percha points in vitro. Each bacterial strain was suspended in 100% cell culture medium or in culture medium containing 4.5, 45 or 90% (vol/vol) serum. The bacterial suspensions were then co-incubated anaerobically with gutta-percha points for 7 d. The gutta-percha points were processed for scanning electron microscopic observation and examined for biofilm presence and thickness. E. faecalis, Strep. sanguis, Strep. intermedius, Strep. pyogenes and Staph. aureus biofilms were generated on the surfaces of the specimens incubated in culture medium supplemented with 45 or 90% (vol/vol) serum. The E. faecalis and Strep. sanguis biofilms were significantly thicker than those of Strep. intermedius, Strep. pyogenes and Staph. aureus. No biofilms were detected on the specimens incubated with F. nucleatum, Prop. acnes, Porph. gingivalis and Prev. intermedia. These findings suggest that Gram-positive facultative anaerobes have the ability to colonize and form extracellular matrices on gutta-percha points, while serum plays a crucial role in biofilm formation.
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Affiliation(s)
- Naoki Takemura
- Department of Restorative Dentistry and Endodontology, Osaka University Graduate School of Dentistry, 1-8 Yamadaoka, Suita, Osaka 565-0871, Japan.
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Noiri Y, Li L, Yoshimura F, Ebisu S. Localization of Porphyromonas gingivalis-carrying fimbriae in situ in human periodontal pockets. J Dent Res 2005; 83:941-5. [PMID: 15557402 DOI: 10.1177/154405910408301210] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Fimbriae, which are involved in adherence, constitute an important pathogenic factor of Porphyromonas gingivalis. In vivo, however, the distribution of P. gingivalis-carrying fimbriae is unknown. The localization of P. gingivalis-carrying fimbriae was examined in situ. From 19 patients with severe periodontitis and P. gingivalis, we obtained 20 teeth with periodontal tissue attached, with and without immunolocalized fimbriae. Eleven teeth were subjected to light microscopy, 9 to electron microscopy. In 6 of the 11 samples examined, we detected positive reactions with an anti-P. gingivalis-fimbriae serum, located in the cementum-attached plaque area in the deep pocket zones. In the so-called 'plaque-free zones', P. gingivalis-carrying fimbriae were immunocytochemically observed to reside in contact with the dental cuticle in 6 of the 9 samples examined. These findings suggest that P. gingivalis-carrying fimbriae are strongly related to adherence to the root surface at the bottoms of human periodontal pockets.
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Affiliation(s)
- Y Noiri
- Department of Restorative Dentistry and Endodontology, Osaka University Graduate School of Dentistry, 1-8 Yamadaoka, Suita, Osaka 565-0871, Japan.
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Affiliation(s)
- Tatsuji Nishihara
- Department of Oral Microbiology, Kyushu Dental College, Fukuoka, Japan
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Umeda M, Takeuchi Y, Noguchi K, Huang Y, Koshy G, Ishikawa I. Effects of nonsurgical periodontal therapy on the microbiota. Periodontol 2000 2004; 36:98-120. [PMID: 15330945 DOI: 10.1111/j.1600-0757.2004.03675.x] [Citation(s) in RCA: 79] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Affiliation(s)
- Makoto Umeda
- Department of Hard Tissue Engineering, Tokyo Medical and Dental University Graduate School, JapanDepartment of Hard Tissue Engineering, Tokyo Medical and Dental University Graduate School, Japan
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Narimatsu M, Noiri Y, Itoh S, Noguchi N, Kawahara T, Ebisu S. Essential role for the gtfA gene encoding a putative glycosyltransferase in the adherence of Porphyromonas gingivalis. Infect Immun 2004; 72:2698-702. [PMID: 15102778 PMCID: PMC387855 DOI: 10.1128/iai.72.5.2698-2702.2004] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Porphyromonas gingivalis, an oral bacterium, might play a role in the pathogenesis or progression of adult periodontitis. In this study, we isolated from P. gingivalis a putative glycosyltransferase gene, designated gtfA, which had a consensus domain for glycosyltransferase in its N terminus. GtfA consisted of 248 amino acids and its predicted molecular mass was 28 kDa; however, as the molecular mass of endogenous GtfA protein was around 40 kDa, this suggested that GtfA had undergone some posttranslational modifications. To reveal the role of the gtfA gene in P. gingivalis, we established gtfA-deficient strains by allelic replacement. Morphologically, gtfA-deficient P. gingivalis lacked mature fimbriae. gtfA-deficient P. gingivalis also showed a very low ability for autoaggregation, and its ability to attach to epithelial cells was severely impaired. Thus, the results indicate that the gtfA gene is required for P. gingivalis autoaggregation as well as attachment to epithelial cells. These results suggest that GtfA might have an important role in the pathogenicity of P. gingivalis by regulating adhesion.
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Affiliation(s)
- Masahiro Narimatsu
- Department of Restorative Dentistry and Endodontology, Osaka University Graduate School of Dentistry, Suita, Osaka 565-0871, Japan.
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Zimmer M, Barnhart H, Idris U, Lee MD. Detection of Campylobacter jejuni strains in the water lines of a commercial broiler house and their relationship to the strains that colonized the chickens. Avian Dis 2003; 47:101-7. [PMID: 12713164 DOI: 10.1637/0005-2086(2003)047[0101:docjsi]2.0.co;2] [Citation(s) in RCA: 51] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Campylobacter jejuni is frequently present in the intestinal tract of commercial broiler chickens, and their drinking water has been proposed to be an initial source of bacteria for newly hatched chicks. We studied three sequential commercial broiler flocks raised in a house from which we had cultured C. jejuni from the nipple waters prior to placement of the first flock. Campylobacter cells were detected by immunofluorescence in the biofilm of the drinking nipples during the weeks when the flock was colonized with C. jejuni but not during weeks when the birds were negative. Campylobacter jejuni was isolated from the drinking water during the growth of the first flock and was present in the birds from all three flocks. Randomly amplified polymorphic DNA (RAPD)-polymerase chain reaction (PCR) typing with primer OPA11 indicated that seven distinct strains were present within the broiler house. One strain found in drinking water was similar to a strain found in birds in the second flock; however, RAPD-PCR with primer HLW85 showed that the strains were not identical. These results suggest that although the watering system is a potential source of C. jejuni in broiler flocks, the waterborne strain in this study was not detected in the birds.
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Affiliation(s)
- Martha Zimmer
- Department of Environmental Health Science, The University of Georgia, Athens, GA 30602, USA
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Noiri Y, Ehara A, Kawahara T, Takemura N, Ebisu S. Participation of bacterial biofilms in refractory and chronic periapical periodontitis. J Endod 2002; 28:679-83. [PMID: 12398163 DOI: 10.1097/00004770-200210000-00001] [Citation(s) in RCA: 114] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
The aim of this study was to examine morphologically the participation of extraradicular biofilm in refractory periapical periodontitis. Six teeth and five extruded root filling gutta-percha points associated with refractory periapical periodontitis were investigated by scanning electron microscope. In nine of 11 samples examined, bacterial biofilms were seen at the extraradicular area. The gutta-percha surface was covered with glycocalyx-like structures, and filaments, long rods, and spirochete-shaped bacteria were predominant in the extraradicular sites. Planktonic cells, which were filaments and spirochete-shaped bacteria, emigrated from the glycocalyx structures in some spots. In the extracted teeth, biofilm consisting of both bacteria and glycocalyx-like structures were observed on the periapical root surfaces. Next to the residual periodontal ligament, a few filaments, rods, and fusiforms were attached on the healthy cementum surface. The present findings suggested that bacterial biofilms formed in the extraradicular areas were related to refractory periapical periodontitis.
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Affiliation(s)
- Yuichiro Noiri
- Department of Restorative Dentistry and Endodontology, Osaka University Graduate, School of Dentistry, Suita, Japan
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Abstract
Bacteria have well documented abilities to induce protective as well as pathogenic mucosal immune responses, with the type of response dependent on the genetically programmed balance of pro- and anti-inflammatory cytokines and T-lymphocyte subsets. Inflammatory bowel disease, especially Crohn disease and periodontal disease, appear to be overly aggressive cellular immune responses to some, but not all, normal resident bacteria. Recent evidence suggests that the balance of protective (probiotic) and aggressive commensal luminal bacterial species is an additional determinant of mucosal homeostasis (tolerance) versus pathogenic immune responses (loss of tolerance) and that this balance can be therapeutically manipulated. Mucosal pathogens elicit a characteristic profile of cytokines from epithelial cells, including chemokines that recruit effector cells to the site of invasion to clear the invading organism. The molecular mechanisms of epithelial attachment and invasion of bacterial pathogens (eg, Salmonella, Shigella, pathogenic Escherichia coli, and Yersinia) and the mechanisms of injury induced by Clostridium difficile toxins and Helicobacter pylori are beginning to be understood, as are the innate and cognate host immune responses to these organisms, leading to novel means to effectively block bacterial injury and induce protective immune responses through immunization.
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Affiliation(s)
- R B Sartor
- Department of Microbiology & Immunology, Multidisciplinary Center for IBD Research and Treatment, University of North Carolina, Chapel Hill, North Carolina, USA.
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Noiri Y, Li L, Ebisu S. The localization of periodontal-disease-associated bacteria in human periodontal pockets. J Dent Res 2001; 80:1930-4. [PMID: 11706954 DOI: 10.1177/00220345010800101301] [Citation(s) in RCA: 75] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Some Gram-negative anaerobes are associated with the incidence and progression of periodontal disease. In periodontal pockets, however, the localization of those bacteria is unknown. We investigated the localization of 5 bacterial species in human periodontal pockets. Fifteen teeth with a part of periodontal pockets from 10 adult periodontitis patients were obtained, and the localization of bacteria was examined immunohistochemically. Positive reactions with anti-Prevotella nigrescens antibody were located at the epithelium-associated plaque area in the middle pocket zones. In the middle and deep pocket zones, Fusobacterium nucleatum and Treponema denticola were especially localized in the unattached plaque area, but Eikenella corrodens was observed in the tooth-attached plaque area. Actinobacillus actinomycetemcomitans, detected in 2 of 15 samples examined, was found in the unattached plaque area, in the middle pocket zone. The present findings indicated that the 5 bacterial species examined localized at distinct regions in human periodontal pockets.
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Affiliation(s)
- Y Noiri
- Department of Restorative Dentistry and Endodontology, Osaka University Graduate School of Dentistry, Suita, Japan
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