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Fan X, Monson KR, Peters BA, Whittington JM, Um CY, Oberstein PE, McCullough ML, Freedman ND, Huang WY, Ahn J, Hayes RB. Altered salivary microbiota associated with high-sugar beverage consumption. Sci Rep 2024; 14:13386. [PMID: 38862651 PMCID: PMC11167035 DOI: 10.1038/s41598-024-64324-w] [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: 09/11/2023] [Accepted: 06/07/2024] [Indexed: 06/13/2024] Open
Abstract
The human oral microbiome may alter oral and systemic disease risk. Consuming high sugar content beverages (HSB) can lead to caries development by altering the microbial composition in dental plaque, but little is known regarding HSB-specific oral microbial alterations. Therefore, we conducted a large, population-based study to examine associations of HSB intake with oral microbiome diversity and composition. Using mouthwash samples of 989 individuals in two nationwide U.S. cohorts, bacterial 16S rRNA genes were amplified, sequenced, and assigned to bacterial taxa. HSB intake was quantified from food frequency questionnaires as low (< 1 serving/week), medium (1-3 servings/week), or high (> 3 servings/week). We assessed overall bacterial diversity and presence of specific taxa with respect to HSB intake in each cohort separately and combined in a meta-analysis. Consistently in the two cohorts, we found lower species richness in high HSB consumers (> 3 cans/week) (p = 0.027), and that overall bacterial community profiles differed from those of non-consumers (PERMANOVA p = 0.040). Specifically, presence of a network of commensal bacteria (Lachnospiraceae, Peptostreptococcaceae, and Alloprevotella rava) was less common in high compared to non-consumers, as were other species including Campylobacter showae, Prevotella oulorum, and Mycoplasma faucium. Presence of acidogenic bacteria Bifodobacteriaceae and Lactobacillus rhamnosus was more common in high consumers. Abundance of Fusobacteriales and its genus Leptotrichia, Lachnoanaerobaculum sp., and Campylobacter were lower with higher HSB consumption, and their abundances were correlated. No significant interaction was found for these associations with diabetic status or with microbial markers for caries (S. mutans) and periodontitis (P. gingivalis). Our results suggest that soft drink intake may alter the salivary microbiota, with consistent results across two independent cohorts. The observed perturbations of overrepresented acidogenic bacteria and underrepresented commensal bacteria in high HSB consumers may have implications for oral and systemic disease risk.
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Affiliation(s)
- Xiaozhou Fan
- Division of Epidemiology, Department of Population Health, NYU Grossman School of Medicine, 180 Madison, New York, NY, 10016, USA
| | - Kelsey R Monson
- Division of Epidemiology, Department of Population Health, NYU Grossman School of Medicine, 180 Madison, New York, NY, 10016, USA
- Laura and Isaac Perlmutter Cancer Center, NYU Langone Health, New York, NY, USA
| | - Brandilyn A Peters
- Division of Epidemiology, Department of Population Health, NYU Grossman School of Medicine, 180 Madison, New York, NY, 10016, USA
- Department of Epidemiology and Population Health, Albert Einstein College of Medicine, Bronx, NY, USA
| | | | - Caroline Y Um
- Department of Population Science, American Cancer Society, Atlanta, GA, USA
| | - Paul E Oberstein
- Laura and Isaac Perlmutter Cancer Center, NYU Langone Health, New York, NY, USA
| | | | - Neal D Freedman
- Division of Cancer Epidemiology and Genetics, National Cancer Institute, Bethesda, MD, USA
| | - Wen-Yi Huang
- Division of Cancer Epidemiology and Genetics, National Cancer Institute, Bethesda, MD, USA
| | - Jiyoung Ahn
- Division of Epidemiology, Department of Population Health, NYU Grossman School of Medicine, 180 Madison, New York, NY, 10016, USA
- Laura and Isaac Perlmutter Cancer Center, NYU Langone Health, New York, NY, USA
| | - Richard B Hayes
- Division of Epidemiology, Department of Population Health, NYU Grossman School of Medicine, 180 Madison, New York, NY, 10016, USA.
- Laura and Isaac Perlmutter Cancer Center, NYU Langone Health, New York, NY, USA.
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Yáñez L, Soto C, Tapia H, Pacheco M, Tapia J, Osses G, Salinas D, Rojas-Celis V, Hoare A, Quest AFG, Díaz-Elizondo J, Pérez-Donoso JM, Bravo D. Co-Culture of P. gingivalis and F. nucleatum Synergistically Elevates IL-6 Expression via TLR4 Signaling in Oral Keratinocytes. Int J Mol Sci 2024; 25:3611. [PMID: 38612423 PMCID: PMC11011619 DOI: 10.3390/ijms25073611] [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: 02/23/2024] [Revised: 03/15/2024] [Accepted: 03/17/2024] [Indexed: 04/14/2024] Open
Abstract
Periodontitis, characterized by persistent inflammation in the periodontium, is intricately connected to systemic diseases, including oral cancer. Bacteria, such as Porphyromonas gingivalis and Fusobacterium nucleatum, play a pivotal role in periodontitis development because they contribute to dysbiosis and tissue destruction. Thus, comprehending the interplay between these bacteria and their impacts on inflammation holds significant relevance in clinical understanding and treatment advancement. In the present work, we explored, for the first time, their impacts on the expressions of pro-inflammatory mediators after infecting oral keratinocytes (OKs) with a co-culture of pre-incubated P. gingivalis and F. nucleatum. Our results show that the co-culture increases IL-1β, IL-8, and TNF-α expressions, synergistically augments IL-6, and translocates NF-kB to the cell nucleus. These changes in pro-inflammatory mediators-associated with chronic inflammation and cancer-correlate with an increase in cell migration following infection with the co-cultured bacteria or P. gingivalis alone. This effect depends on TLR4 because TLR4 knockdown notably impacts IL-6 expression and cell migration. Our study unveils, for the first time, crucial insights into the outcomes of their co-culture on virulence, unraveling the role of bacterial interactions in polymicrobial diseases and potential links to oral cancer.
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Affiliation(s)
- Lucas Yáñez
- Microbial Interactions Laboratory, Faculty of Dentistry, Universidad Andrés Bello, Santiago 8370133, Chile; (L.Y.); (C.S.); (H.T.); (M.P.); (J.T.); (G.O.); (J.D.-E.)
- Advanced Center for Chronic Diseases (ACCDiS), Faculty of Medicine, Universidad de Chile, Santiago 8380453, Chile;
| | - Cristopher Soto
- Microbial Interactions Laboratory, Faculty of Dentistry, Universidad Andrés Bello, Santiago 8370133, Chile; (L.Y.); (C.S.); (H.T.); (M.P.); (J.T.); (G.O.); (J.D.-E.)
- Advanced Center for Chronic Diseases (ACCDiS), Faculty of Medicine, Universidad de Chile, Santiago 8380453, Chile;
| | - Héctor Tapia
- Microbial Interactions Laboratory, Faculty of Dentistry, Universidad Andrés Bello, Santiago 8370133, Chile; (L.Y.); (C.S.); (H.T.); (M.P.); (J.T.); (G.O.); (J.D.-E.)
- Advanced Center for Chronic Diseases (ACCDiS), Faculty of Medicine, Universidad de Chile, Santiago 8380453, Chile;
| | - Martín Pacheco
- Microbial Interactions Laboratory, Faculty of Dentistry, Universidad Andrés Bello, Santiago 8370133, Chile; (L.Y.); (C.S.); (H.T.); (M.P.); (J.T.); (G.O.); (J.D.-E.)
- Advanced Center for Chronic Diseases (ACCDiS), Faculty of Medicine, Universidad de Chile, Santiago 8380453, Chile;
| | - Javiera Tapia
- Microbial Interactions Laboratory, Faculty of Dentistry, Universidad Andrés Bello, Santiago 8370133, Chile; (L.Y.); (C.S.); (H.T.); (M.P.); (J.T.); (G.O.); (J.D.-E.)
- Advanced Center for Chronic Diseases (ACCDiS), Faculty of Medicine, Universidad de Chile, Santiago 8380453, Chile;
| | - Gabriela Osses
- Microbial Interactions Laboratory, Faculty of Dentistry, Universidad Andrés Bello, Santiago 8370133, Chile; (L.Y.); (C.S.); (H.T.); (M.P.); (J.T.); (G.O.); (J.D.-E.)
- Advanced Center for Chronic Diseases (ACCDiS), Faculty of Medicine, Universidad de Chile, Santiago 8380453, Chile;
| | - Daniela Salinas
- Oral Microbiology and Immunology Laboratory, Department of Pathology and Oral Medicine, Faculty of Dentistry, Universidad de Chile, Santiago 8380492, Chile; (D.S.); (A.H.)
| | - Victoria Rojas-Celis
- Virology Laboratory, Department of Biology, Faculty of Sciences, Universidad de Chile, Santiago 7800003, Chile;
| | - Anilei Hoare
- Oral Microbiology and Immunology Laboratory, Department of Pathology and Oral Medicine, Faculty of Dentistry, Universidad de Chile, Santiago 8380492, Chile; (D.S.); (A.H.)
| | - Andrew F. G. Quest
- Advanced Center for Chronic Diseases (ACCDiS), Faculty of Medicine, Universidad de Chile, Santiago 8380453, Chile;
- Cellular Communication Laboratory, Center for Studies on Exercise, Metabolism and Cancer (CEMC), Program of Cell and Molecular Biology, Institute of Biomedical Sciences (ICBM), Faculty of Medicine, Universidad de Chile, Santiago 8380453, Chile
| | - Jessica Díaz-Elizondo
- Microbial Interactions Laboratory, Faculty of Dentistry, Universidad Andrés Bello, Santiago 8370133, Chile; (L.Y.); (C.S.); (H.T.); (M.P.); (J.T.); (G.O.); (J.D.-E.)
- Advanced Center for Chronic Diseases (ACCDiS), Faculty of Medicine, Universidad de Chile, Santiago 8380453, Chile;
| | - José Manuel Pérez-Donoso
- BioNanotechnology and Microbiology Laboratory, Center for Bioinformatics and Integrative Biology (CBIB), Faculty of Life Sciences, Universidad Andrés Bello, Santiago 8370186, Chile;
| | - Denisse Bravo
- Microbial Interactions Laboratory, Faculty of Dentistry, Universidad Andrés Bello, Santiago 8370133, Chile; (L.Y.); (C.S.); (H.T.); (M.P.); (J.T.); (G.O.); (J.D.-E.)
- Advanced Center for Chronic Diseases (ACCDiS), Faculty of Medicine, Universidad de Chile, Santiago 8380453, Chile;
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Britton TA, Wu C, Chen YW, Franklin D, Chen Y, Camacho MI, Luong TT, Das A, Ton-That H. The respiratory enzyme complex Rnf is vital for metabolic adaptation and virulence in Fusobacterium nucleatum. mBio 2024; 15:e0175123. [PMID: 38059640 PMCID: PMC10790702 DOI: 10.1128/mbio.01751-23] [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: 07/06/2023] [Accepted: 10/20/2023] [Indexed: 12/08/2023] Open
Abstract
IMPORTANCE This paper illuminates the significant question of how the oral commensal Fusobacterium nucleatum adapts to the metabolically changing environments of several extra-oral sites such as placenta and colon to promote various diseases as an opportunistic pathogen. We demonstrate here that the highly conserved Rhodobacter nitrogen-fixation complex, commonly known as Rnf complex, is key to fusobacterial metabolic adaptation and virulence. Genetic disruption of this Rnf complex causes global defects in polymicrobial interaction, biofilm formation, cell growth and morphology, hydrogen sulfide production, and ATP synthesis. Targeted metabolomic profiling demonstrates that the loss of this respiratory enzyme significantly diminishes catabolism of numerous amino acids, which negatively impacts fusobacterial virulence as tested in a preterm birth model in mice.
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Affiliation(s)
- Timmie A. Britton
- Molecular Biology Institute, University of California, Los Angeles, California, USA
| | - Chenggang Wu
- Department of Microbiology & Molecular Genetics, University of Texas McGovern Medical School, Houston, Texas, USA
| | - Yi-Wei Chen
- Division of Oral & Systemic Health Sciences, School of Dentistry, University of California, Los Angeles, California, USA
| | - Dana Franklin
- Molecular Biology Institute, University of California, Los Angeles, California, USA
| | - Yimin Chen
- Division of Oral & Systemic Health Sciences, School of Dentistry, University of California, Los Angeles, California, USA
| | - Martha I. Camacho
- Division of Oral & Systemic Health Sciences, School of Dentistry, University of California, Los Angeles, California, USA
| | - Truc T. Luong
- Division of Oral & Systemic Health Sciences, School of Dentistry, University of California, Los Angeles, California, USA
| | - Asis Das
- Department of Medicine, Neag Comprehensive Cancer Center, University of Connecticut Health Center, Farmington, Connecticut, USA
| | - Hung Ton-That
- Molecular Biology Institute, University of California, Los Angeles, California, USA
- Division of Oral & Systemic Health Sciences, School of Dentistry, University of California, Los Angeles, California, USA
- Department of Microbiology, Immunology & Molecular Genetics, University of California, Los Angeles, California, USA
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Ghesquière J, Simoens K, Koos E, Boon N, Teughels W, Bernaerts K. Spatiotemporal monitoring of a periodontal multispecies biofilm model: demonstration of prebiotic treatment responses. Appl Environ Microbiol 2023; 89:e0108123. [PMID: 37768099 PMCID: PMC10617495 DOI: 10.1128/aem.01081-23] [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: 07/01/2023] [Accepted: 07/26/2023] [Indexed: 09/29/2023] Open
Abstract
Biofilms are complex polymicrobial communities which are often associated with human infections such as the oral disease periodontitis. Studying these complex communities under controlled conditions requires in vitro biofilm model systems that mimic the natural environment as close as possible. This study established a multispecies periodontal model in the drip flow biofilm reactor in order to mimic the continuous flow of nutrients at the air-liquid interface in the oral cavity. The design is engineered to enable real-time characterization. A community of five bacteria, Streptococcus gordonii-GFPmut3*, Streptococcus oralis-GFPmut3*, Streptococcus sanguinis-pVMCherry, Fusobacterium nucleatum, and Porphyromonas gingivalis-SNAP26 is visualized using two distinct fluorescent proteins and the SNAP-tag. The biofilm in the reactor develops into a heterogeneous, spatially uniform, dense, and metabolically active biofilm with relative cell abundances similar to those in a healthy individual. Metabolic activity, structural features, and bacterial composition of the biofilm remain stable from 3 to 6 days. As a proof of concept for our periodontal model, the 3 days developed biofilm is exposed to a prebiotic treatment with L-arginine. Multifaceted effects of L-arginine on the oral biofilm were validated by this model setup. L-arginine showed to inhibit growth and incorporation of the pathogenic species and to reduce biofilm thickness and volume. Additionally, L-arginine is metabolized by Streptococcus gordonii-GFPmut3* and Streptococcus sanguinis-pVMCherry, producing high levels of ornithine and ammonium in the biofilm. In conclusion, our drip flow reactor setup is promising in studying spatiotemporal behavior of a multispecies periodontal community.ImportancePeriodontitis is a multifactorial chronic inflammatory disease in the oral cavity associated with the accumulation of microorganisms in a biofilm. Not the presence of the biofilm as such, but changes in the microbiota (i.e., dysbiosis) drive the development of periodontitis, resulting in the destruction of tooth-supporting tissues. In this respect, novel treatment approaches focus on maintaining the health-associated homeostasis of the resident oral microbiota. To get insight in dynamic biofilm responses, our research presents the establishment of a periodontal biofilm model including Streptococcus gordonii, Streptococcus oralis, Streptococcus sanguinis, Fusobacterium nucleatum, and Porphyromonas gingivalis. The added value of the model setup is the combination of simulating continuously changing natural mouth conditions with spatiotemporal biofilm profiling using non-destructive characterization tools. These applications are limited for periodontal biofilm research and would contribute in understanding treatment mechanisms, short- or long-term exposure effects, the adaptation potential of the biofilm and thus treatment strategies.
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Affiliation(s)
- Justien Ghesquière
- Chemical and Biochemical Reactor Engineering and Safety (CREaS), Department of Chemical Engineering, University of Leuven (KU Leuven), Leuven, Belgium
| | - Kenneth Simoens
- Chemical and Biochemical Reactor Engineering and Safety (CREaS), Department of Chemical Engineering, University of Leuven (KU Leuven), Leuven, Belgium
| | - Erin Koos
- Soft Matter, Rheology and Technology, Department of Chemical Engineering, University of Leuven (KU Leuven), Leuven, Belgium
| | - Nico Boon
- Center for Microbial Ecology and Technology (CMET), Ghent University (UGent), Gent, Belgium
| | - Wim Teughels
- Department of Oral Health Sciences, University of Leuven (KU Leuven) and Dentistry (Periodontology), University Hospitals Leuven, Leuven, Belgium
| | - Kristel Bernaerts
- Chemical and Biochemical Reactor Engineering and Safety (CREaS), Department of Chemical Engineering, University of Leuven (KU Leuven), Leuven, Belgium
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Geng H, Sun X, Zhang X, Yuan Y. Efficient titanium surface modified using bifunctional chimeric peptides to prevent biofilm formation by multiple microorganisms. Colloids Surf B Biointerfaces 2023; 230:113534. [PMID: 37690227 DOI: 10.1016/j.colsurfb.2023.113534] [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: 06/14/2023] [Revised: 08/18/2023] [Accepted: 09/04/2023] [Indexed: 09/12/2023]
Abstract
It is still a challenge to prevent the formation of bacterial biofilms on the surfaces of oral implants. A chemical peptide with binding and antibacterial properties may be a promising agent if used to modify titanium (Ti) surfaces to inhibit biofilm formation. In this study, peptides were designed by linking the antimicrobial sequence derived from human β-defensin-3 (hBD-3) to the Ti-binding peptide-1 (TBP-1) sequence by using a triple glycine (G) linker. The antimicrobial activity and biocompatibility characteristics of the chemical-peptide-modified Ti surface were then evaluated and the potential antibacterial mechanism was investigated. This study demonstrated that the chemical-peptide-modified surface exhibited satisfactory bactericidal activities against Streptococcus gordonii, Fusobacterium nucleatum, and Porphyromonas gingivalis. In addition to its potent bacteria-killing efficacy, the surface-immobilised chemical peptide also demonstrated excellent biocompatibility to L929 cells. Moreover, the disruption of the integrity of the bacterial membrane partially revealed the antibacterial mechanism of the peptide. This study demonstrated the potential of chemical-peptide-modified Ti surfaces for preventing the occurrence of peri-implant diseases, thereby providing a promising approach to improving the survival rate of oral implants.
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Affiliation(s)
- Hongjuan Geng
- Department of Stomatology, Tianjin Hospital, 406 Jiefang South Road, Hexi District, Tianjin 300211, PR China
| | - Xun Sun
- Department of Stomatology, Tianjin Hospital, 406 Jiefang South Road, Hexi District, Tianjin 300211, PR China
| | - Xi Zhang
- School and Hospital of Stomatology, Tianjin Medical University, 12 Observatory Road, Tianjin 300070, PR China.
| | - Yang Yuan
- General Hospital, Tianjin Medical University, 154 An Shan Road, Tianjin 300052, PR China.
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Robinson AV, Allen-Vercoe E. Strain specificity in fusobacterial co-aggregation with colorectal cancer-relevant species. Anaerobe 2023; 82:102758. [PMID: 37423597 DOI: 10.1016/j.anaerobe.2023.102758] [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: 03/27/2023] [Revised: 06/22/2023] [Accepted: 06/26/2023] [Indexed: 07/11/2023]
Abstract
OBJECTIVES The purpose of the present study was to characterize co-aggregation interactions between isolates of Fusobacterium nucleatum subsp. animalis and other colorectal cancer (CRC)-relevant species. METHODS Co-aggregation interactions were assessed by comparing optical density values following 2-h stationary strain co-incubations to strain optical density values when incubated alone. Co-aggregation was characterized between strains from a previously isolated, CRC biopsy-derived community and F. nucleatum subsp. animalis, a species linked to CRC and known to be highly aggregative. Interactions were also investigated between the fusobacterial isolates and strains sourced from alternate human gastrointestinal samples whose closest species match aligned with species in the CRC biopsy-derived community. RESULTS Co-aggregation interactions were observed to be strain-specific, varying between both F. nucleatum subsp. animalis strains and different strains of the same co-aggregation partner species. F. nucleatum subsp. animalis strains were observed to co-aggregate strongly with several taxa linked to CRC: Campylobacter concisus, Gemella spp., Hungatella hathewayi, and Parvimonas micra. CONCLUSIONS Co-aggregation interactions suggest the ability to encourage the formation of biofilms, and colonic biofilms, in turn, have been linked to promotion and/or progression of CRC. Co-aggregation between F. nucleatum subsp. animalis and CRC-linked species such as C. concisus, Gemella spp., H. hathewayi, and P. micra may contribute to both biofilm formation along CRC lesions and to disease progression.
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Affiliation(s)
- Avery V Robinson
- University of Guelph, 50 Stone Rd E, Guelph, ON, N1G 2W1, Canada.
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Bapat RA, Libat R, Yuin OS, Parolia A, Ilyas MS, Khan AS, Kay MK, Pichika MR, Saxena K, Seow LL, Sidhu P, Daood U. Antimicrobial FiteBac® K21 promotes antimicrobial Potency and wound healing. Heliyon 2023; 9:e19282. [PMID: 37664740 PMCID: PMC10469996 DOI: 10.1016/j.heliyon.2023.e19282] [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: 10/03/2022] [Revised: 07/27/2023] [Accepted: 08/17/2023] [Indexed: 09/05/2023] Open
Abstract
Objectives Successful root canal therapy is dependent on the efficacy of complete instrumentation and adequate use of chemical irrigant to eliminate the biofilm from dentin surface. The aim of the study was to examine antibiofilm and antimicrobial effectiveness of newly formulated Quaternary ammonium silane (QAS/also codenamed K21; against Fusobacterium nucleatum (F. nucleatum) and Enterococcus faecalis (E. faecalis) biofilm on radicular dentin with evaluation of the anti-inflammatory consequence in vivo. Methods Fourier Transform Infrared Spectroscopy (FTIR) was performed after complete hydrolysis of K21 solution. Human teeth were inoculated with biofilms for 7-days followed by treatment with various irrigants. The irrigant groups were Sodium hypochlorite [NaOCl (6%)], Chlorhexidine [CHX (2%)], K21 (0.5%), K21 (1%) and Saline. Scanning electron microscopy (SEM) was performed for biofilm and resin-dentin penetration. Transmission Electron Microscopy (TEM) of biofilms was done to evaluate application of K21. For in vivo evaluation, Albino wistar rats were injected subcutaneously and sections were stained with haematoxylin/eosin. Macrophage, M1/M2 expression were evaluated along with molecular simulation. Raman measurements were done on dried biofilms. Results FTIR K21 specimens demonstrated presence of ethanol/silanol groups. Raman band at 1359 cm-1 resemble to -CH2- wagging displaying 29Si atoms in Nuclear Magnetic Resonance (NMR). 0.5%K21 showed cells exhibiting folded membranes. SEM showed staggering amount of resin tags with 0.5% K21 group. TEM showed membrane disruption in K21-groups. K21 groups were initially irritant, which subsided completely afterwards showing increased CD68. K21 and MMP/collagen complex was thermodynamically favourable. Conclusion K21 root canal irrigant was able to penetrate bacterial wall and can serve as a potential irrigant for therapeutic benefits. Expression of M2 polarized subsets showed K21 can serve in resolving inflammation and potentiate tissue repair.
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Affiliation(s)
- Ranjeet Ajit Bapat
- Restorative Division, School of Dentistry, International Medical University Kuala Lumpur, 126, Jalan Jalil Perkasa 19, Bukit Jalil, 57000, Wilayah Persekutuan Kuala Lumpur, Malaysia
| | - Rikan Libat
- Restorative Division, School of Dentistry, International Medical University Kuala Lumpur, 126, Jalan Jalil Perkasa 19, Bukit Jalil, 57000, Wilayah Persekutuan Kuala Lumpur, Malaysia
| | - Ong Shu Yuin
- Restorative Division, School of Dentistry, International Medical University Kuala Lumpur, 126, Jalan Jalil Perkasa 19, Bukit Jalil, 57000, Wilayah Persekutuan Kuala Lumpur, Malaysia
| | - Abhishek Parolia
- Restorative Division, School of Dentistry, International Medical University Kuala Lumpur, 126, Jalan Jalil Perkasa 19, Bukit Jalil, 57000, Wilayah Persekutuan Kuala Lumpur, Malaysia
| | | | - Abdul Samad Khan
- Department of Restorative Dental Sciences, College of Dentistry, Imam Abdulrahman Bin Faisal University; Dammam, Saudi Arabia
| | - Mak Kit Kay
- Pharmaceutical Chemistry, School of Pharmacy, International Medical University, Kuala Lumpur, Malaysia
| | - Mallikarjuna Rao Pichika
- Pharmaceutical Chemistry, School of Pharmacy, International Medical University, Kuala Lumpur, Malaysia
| | - Kirti Saxena
- Clinical Oral Health Sciences Division, School of Dentistry, International Medical University Kuala Lumpur, 126, Jalan Jalil Perkasa 19, Bukit Jalil, 57000, Wilayah Persekutuan Kuala Lumpur, Malaysia
| | - Liang Lin Seow
- Restorative Division, School of Dentistry, International Medical University Kuala Lumpur, 126, Jalan Jalil Perkasa 19, Bukit Jalil, 57000, Wilayah Persekutuan Kuala Lumpur, Malaysia
| | - Preena Sidhu
- Restorative Division, School of Dentistry, International Medical University Kuala Lumpur, 126, Jalan Jalil Perkasa 19, Bukit Jalil, 57000, Wilayah Persekutuan Kuala Lumpur, Malaysia
| | - Umer Daood
- Restorative Division, School of Dentistry, International Medical University Kuala Lumpur, 126, Jalan Jalil Perkasa 19, Bukit Jalil, 57000, Wilayah Persekutuan Kuala Lumpur, Malaysia
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Britton TA, Wu C, Chen YW, Franklin D, Chen Y, Camacho MI, Luong TT, Das A, Ton-That H. The respiratory enzyme complex Rnf is vital for metabolic adaptation and virulence in Fusobacterium nucleatum. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.06.13.544113. [PMID: 37398403 PMCID: PMC10312631 DOI: 10.1101/2023.06.13.544113] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/04/2023]
Abstract
A prominent oral commensal and opportunistic pathogen, Fusobacterium nucleatum can traverse to extra-oral sites such as placenta and colon, promoting adverse pregnancy outcomes and colorectal cancer, respectively. How this anaerobe sustains many metabolically changing environments enabling its virulence potential remains unclear. Informed by our genome-wide transposon mutagenesis, we report here that the highly conserved Rnf complex, encoded by the rnfCDGEAB gene cluster, is key to fusobacterial metabolic adaptation and virulence. Genetic disruption of the Rnf complex via non-polar, in-frame deletion of rnfC (Δ rnfC ) abrogates polymicrobial interaction (or coaggregation) associated with adhesin RadD and biofilm formation. The defect in coaggregation is not due to reduced cell surface of RadD, but rather an increased level of extracellular lysine, which binds RadD and inhibits coaggregation. Indeed, removal of extracellular lysine via washing Δ rnfC cells restores coaggregation, while addition of lysine inhibits this process. These phenotypes mirror that of a mutant (Δ kamAΔ ) that fails to metabolize extracellular lysine. Strikingly, the Δ rnfC mutant is defective in ATP production, cell growth, cell morphology, and expression of the enzyme MegL that produces hydrogen sulfide from cysteine. Targeted metabolic profiling demonstrated that catabolism of many amino acids, including histidine and lysine, is altered in Δ rnfC cells, thereby reducing production of ATP and metabolites including H2S and butyrate. Most importantly, we show that the Δ rnfC mutant is severely attenuated in a mouse model of preterm birth. The indispensable function of Rnf complex in fusobacterial pathogenesis via modulation of bacterial metabolism makes it an attractive target for developing therapeutic intervention.
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Lamtri Laarif M, Schils R, Lifrange F, Valkenborgh C, Pitti P, Brouwers P, Bianchi E, Meex C, Hayette MP. Actinomyces israelii and Fusobacterium nucleatum brain abscess in an immunocompetent patient: case report. Access Microbiol 2023; 5:acmi000499.v4. [PMID: 37424555 PMCID: PMC10323790 DOI: 10.1099/acmi.0.000499.v4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2022] [Accepted: 05/09/2023] [Indexed: 07/11/2023] Open
Abstract
Introduction Brain abscess is the most common focal infectious neurological injury. Until the nineteenth century this condition was fatal, however the development of neuroimaging for early diagnosis, neurosurgery and antibiotic therapy in the twentieth century has led to new therapeutic strategies decreasing mortality from 50 % in the 1970s to less than 10 % nowadays. In this context we report a case of brain abscess with a dental origin. Case report A immunocompetent man without any addiction presented to the emergency department with dysarthria and frontal headache at home. The clinical examination was normal. Further investigations revealed a polymicrobial brain abscess as a consequence of an ear, nose or throat (ENT) infection with locoregional extension with a dental starting point involving Actinomyces israelii and Fusobacterium nucleatum . In spite of a rapid diagnosis and a neurosurgical management associated with an optimal treatment by a dual therapy made of ceftriaxone and metronidazole the patient unfortunately died. Conclusion This case report shows that despite a low incidence and a good prognosis following the diagnosis, brain abscesses can lead to patient's death. Thereby, when the patient's condition and urgency allow, a thorough dental examination of patients with neurological signs following the recommendations would improve the diagnosis made by the clinician. The use of microbiological documentation, the respect of pre-analytical conditions, the interaction between the laboratory and the clinicians are indispensable for an optimal management of these pathologies.
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Affiliation(s)
- Mouhsine Lamtri Laarif
- Department of Clinical Biology, Microbiology, University of Liège Hospital, Liège, Belgium
| | - Raphael Schils
- Department of Internal Medicine, Infectious Diseases, University of Liège Hospital, Liège, Belgium
| | - Fréderic Lifrange
- Department of Pathology, University of Liege Hospital, Liège, Belgium
| | | | - Pauline Pitti
- Department of Clinical Biology, Microbiology, University of Liège Hospital, Liège, Belgium
| | - Pauline Brouwers
- Department of Clinical Biology, Microbiology, University of Liège Hospital, Liège, Belgium
| | - Elettra Bianchi
- Department of Pathology, University of Liege Hospital, Liège, Belgium
| | - Cécile Meex
- Department of Clinical Biology, Microbiology, University of Liège Hospital, Liège, Belgium
| | - Marie-Pierre Hayette
- Department of Clinical Biology, Microbiology, University of Liège Hospital, Liège, Belgium
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10
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Darbyshire A, Mothersole R, Wolthers KR. Biosynthesis of meso-lanthionine in Fusobacterium nucleatum. Arch Biochem Biophys 2023:109666. [PMID: 37329940 DOI: 10.1016/j.abb.2023.109666] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2023] [Revised: 06/01/2023] [Accepted: 06/09/2023] [Indexed: 06/19/2023]
Abstract
The opportunistic oral pathogen, Fusobacterium nucleatum contains meso-lanthionine as the diaminodicarboxylic acid in the pentapeptide crosslink of the peptidoglycan layer. The diastereomer, l,l-lanthionine is formed by lanthionine synthase, a PLP-dependent enzyme that catalyzes the β-replacement of l-cysteine with a second equivalent of l-cysteine. In this study, we explored possible enzymatic mechanisms for the formation of meso-lanthionine. Our inhibition studies with lanthionine synthase, described herein, revealed that meso-diaminopimelate, a bioisostere of meso-lanthionine, is a more potent inhibitor of lanthionine synthase compared to the diastereomer, l,l-diaminopimelate. These results suggested that lanthionine synthase could also form meso-lanthionine by the β-replacement of l-cysteine with d-cysteine. Through steady-state and pre-steady state kinetic analysis, we confirm that d-cysteine reacts with the ⍺-aminoacylate intermediate with a kon that was 2-3-fold faster and Kd value that was 2-3fold lower compared to l-cysteine. However, given that intracellular levels of d-cysteine levels are assumed to be significantly lower than that of l-cysteine, we also determined if the gene product, FN1732, with low sequence identity to diaminopimelate epimerase could convert l,l-lanthionine to meso-lanthionine. Using diaminopimelate dehydrogenase in a coupled spectrophotometric assay, we show that FN1732 can convert l,l-lanthionine to meso-lanthionine with a kcat of 0.07 ± 0.001 s-1 and a KM of 1.9 ± 0.1 mM. In summary, our results provide two possible enzymatic mechanisms for the biosynthesis of meso-lanthionine in F. nucleatum.
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Affiliation(s)
- Amanda Darbyshire
- Department of Chemistry, University of British Columbia, Okanagan Campus, Kelowna, B.C, V1V 1V7, Canada
| | - Robert Mothersole
- Department of Chemistry, University of British Columbia, Okanagan Campus, Kelowna, B.C, V1V 1V7, Canada
| | - Kirsten R Wolthers
- Department of Chemistry, University of British Columbia, Okanagan Campus, 3247 University Way, Kelowna, Canada.
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11
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Rengo C, Valletta A, Liccardo D, Spagnuolo G, Corbi G, De Luca F, Lauria MR, Perrotta A, Rengo G, Ferrara N, Rengo S, Valletta R, Cannavo A. Healthy aging: when periodontal health matters. JOURNAL OF GERONTOLOGY AND GERIATRICS 2023. [DOI: 10.36150/2499-6564-n580] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/05/2023]
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12
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Godoi-Jr EP, Bronzato JD, Francisco PA, Bícego-Pereira EC, Lopes EM, Passini MRZ, de-Jesus-Soares A, Almeida JFA, Marciano MA, Ferraz CCR, Gomes BPFA. Microbiological profile of root canals indicated for endodontic retreatment due to secondary endodontic infections or for prosthetic reasons. Clin Oral Investig 2023; 27:2049-2064. [PMID: 37002440 DOI: 10.1007/s00784-023-04947-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2023] [Accepted: 03/07/2023] [Indexed: 04/03/2023]
Abstract
OBJECTIVE The objective of this study was to evaluate the microbiological profile of root canals indicated for endodontic retreatment due to secondary endodontic infections evidenced by the presence of chronic apical periodontitis (G1) or for prosthetic reasons, without clinical and radiographic signs of endodontic reinfection (G2). METHODS Microbiological samples were collected from thirty teeth (N=30) out of which 15 were indicated for retreatment due to the presence of chronic apical periodontitis (G1) and 15 were indicated exclusively for prosthetic reasons (G2). Samples were collected from root canals before (S1), after chemomechanical preparation (S2), and after 30 days of intracanal medication composed of calcium hydroxide and 2% chlorhexidine gel (S3). The molecular analysis was performed using Nested-PCR for the detection of 17 bacterial species. The efficacy of each stage of the retreatment in reducing the microbial load was verified by counting colony-forming units (CFU). The statistical analysis considered a significance level of 5%. RESULTS The results showed that bacteria were detected in 100% of the cases in S1, in both groups, by Nested PCR. The most frequently found species in S1 in both groups were Enterococcus faecalis, Fusobacterium nucleatum, Porphyromonas gingivalis, Aggregatibacter actinomycetemcomitans, and Parvimonas micra. The microbial load of G1 was higher than G2 in the initial samples (S1). Endodontic retreatment was effective in reducing the microbial load in G1 and G2. Statistically significant associations were found between specific bacteria and clinical signs and symptoms. CONCLUSION It was concluded that the microbial community present in the root canal of teeth indicated for endodontic retreatment is mixed and heterogeneous. G1 and G2 differ in the number of species per case and microbial load. CLINICAL RELEVANCE Endodontic retreatment was effective in reducing the microbial load. Statistically significant associations were found between specific bacteria and clinical signs and symptoms.
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Affiliation(s)
- Ederaldo P Godoi-Jr
- Department of Restorative Dentistry, Division of Endodontics, Piracicaba Dental School, State University of Campinas - UNICAMP, Piracicaba, SP, Brazil
| | - Juliana D Bronzato
- Department of Restorative Dentistry, Division of Endodontics, Piracicaba Dental School, State University of Campinas - UNICAMP, Piracicaba, SP, Brazil
| | - Priscila A Francisco
- Department of Restorative Dentistry, Division of Endodontics, Piracicaba Dental School, State University of Campinas - UNICAMP, Piracicaba, SP, Brazil
| | - Eloá C Bícego-Pereira
- Department of Restorative Dentistry, Division of Endodontics, Piracicaba Dental School, State University of Campinas - UNICAMP, Piracicaba, SP, Brazil
| | - Erica M Lopes
- Department of Restorative Dentistry, Division of Endodontics, Piracicaba Dental School, State University of Campinas - UNICAMP, Piracicaba, SP, Brazil
| | - Maicon R Z Passini
- Department of Restorative Dentistry, Division of Endodontics, Piracicaba Dental School, State University of Campinas - UNICAMP, Piracicaba, SP, Brazil
| | - Adriana de-Jesus-Soares
- Department of Restorative Dentistry, Division of Endodontics, Piracicaba Dental School, State University of Campinas - UNICAMP, Piracicaba, SP, Brazil
| | - José F A Almeida
- Department of Restorative Dentistry, Division of Endodontics, Piracicaba Dental School, State University of Campinas - UNICAMP, Piracicaba, SP, Brazil
| | - Marina A Marciano
- Department of Restorative Dentistry, Division of Endodontics, Piracicaba Dental School, State University of Campinas - UNICAMP, Piracicaba, SP, Brazil
| | - Caio C R Ferraz
- Department of Restorative Dentistry, Division of Endodontics, Piracicaba Dental School, State University of Campinas - UNICAMP, Piracicaba, SP, Brazil
| | - Brenda P F A Gomes
- Department of Restorative Dentistry, Division of Endodontics, Piracicaba Dental School, State University of Campinas - UNICAMP, Piracicaba, SP, Brazil.
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13
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Selenomonas sputigena Interactions with Gingival Epithelial Cells That Promote Inflammation. Infect Immun 2023; 91:e0031922. [PMID: 36648232 PMCID: PMC9933688 DOI: 10.1128/iai.00319-22] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023] Open
Abstract
Increased prevalence and abundance of Selenomonas sputigena have been associated with periodontitis, a chronic inflammatory disease of tooth-supporting tissues, for more than 50 years. Over the past decade, molecular surveys of periodontal disease using 16S and shotgun metagenomic sequencing approaches have confirmed the disease association of classically recognized periodontal pathogens such as Porphyromonas gingivalis, Treponema denticola, and Tannerella forsythia while highlighting previously underappreciated organisms such as Filifactor alocis and S. sputigena. Despite abundant clinical association between S. sputigena and periodontal disease, we have little to no understanding of its pathogenic potential, and virulence mechanisms have not been studied. In this study, we sought to characterize the response of gingival epithelial cells to infection with S. sputigena. Here, we show that S. sputigena attaches to gingival keratinocytes and induces expression and secretion of cytokines and chemokines associated with inflammation and leukocyte recruitment. We demonstrate that S. sputigena induces signaling through Toll-like receptor 2 (TLR2) and TLR4 but evades activation of TLR5. Cytokines released from S. sputigena-infected keratinocytes induced monocyte and neutrophil chemotaxis. These results show that S. sputigena-host interactions have the potential to contribute to bacterially driven inflammation and tissue destruction, the hallmark of periodontitis. Characterization of previously unstudied pathogens may provide novel approaches to develop therapeutics to treat or prevent periodontal disease.
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14
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Biofilm ecology associated with dental caries: Understanding of microbial interactions in oral communities leads to development of therapeutic strategies targeting cariogenic biofilms. ADVANCES IN APPLIED MICROBIOLOGY 2023; 122:27-75. [PMID: 37085193 DOI: 10.1016/bs.aambs.2023.02.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/12/2023]
Abstract
A biofilm is a sessile community characterized by cells attached to the surface and organized into a complex structural arrangement. Dental caries is a biofilm-dependent oral disease caused by infection with cariogenic pathogens, such as Streptococcus mutans, and associated with frequent exposure to a sugar-rich diet and poor oral hygiene. The virulence of cariogenic biofilms is often associated with the spatial organization of S. mutans enmeshed with exopolysaccharides on tooth surfaces. However, in the oral cavity, S. mutans does not act alone, and several other microbes contribute to cariogenic biofilm formation. Microbial communities in cariogenic biofilms are spatially organized into complex structural arrangements of various microbes and extracellular matrices. The balance of microbiota diversity with reduced diversity and a high proportion of acidogenic-aciduric microbiota within the biofilm is closely related to the disease state. Understanding the characteristics of polymicrobial biofilms and the association of microbial interactions within the biofilm (e.g., symbiosis, cooperation, and competition) in terms of their potential role in the pathogenesis of oral disease would help develop new strategies for interventions in virulent biofilm formation.
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15
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Xiang D, Dong PT, Cen L, Bor B, Lux R, Shi W, Yu Q, He X, Wu T. Antagonistic interaction between two key endodontic pathogens Enterococcus faecalis and Fusobacterium nucleatum. J Oral Microbiol 2023; 15:2149448. [DOI: 10.1080/20002297.2022.2149448] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
Affiliation(s)
- Doudou Xiang
- Department of Operative Dentistry and Endodontics, School of Stomatology, The Fourth Military Medical University, Xi’an, Shaanxi, China
- Department of Microbiology, The Forsyth Institute, Cambridge, Massachusetts, USA
| | - Pu-Ting Dong
- Department of Microbiology, The Forsyth Institute, Cambridge, Massachusetts, USA
- Department of Oral Medicine, Infection and Immunity, Harvard School of Dental Medicine, Boston, Massachusetts, USA
| | - Lujia Cen
- Department of Microbiology, The Forsyth Institute, Cambridge, Massachusetts, USA
| | - Batbileg Bor
- Department of Microbiology, The Forsyth Institute, Cambridge, Massachusetts, USA
- Department of Oral Medicine, Infection and Immunity, Harvard School of Dental Medicine, Boston, Massachusetts, USA
| | - Renate Lux
- School of Dentistry, UCLA, Los Angeles, California, USA
| | - Wenyuan Shi
- Department of Microbiology, The Forsyth Institute, Cambridge, Massachusetts, USA
| | - Qing Yu
- Department of Operative Dentistry and Endodontics, School of Stomatology, The Fourth Military Medical University, Xi’an, Shaanxi, China
| | - Xuesong He
- Department of Microbiology, The Forsyth Institute, Cambridge, Massachusetts, USA
- Department of Oral Medicine, Infection and Immunity, Harvard School of Dental Medicine, Boston, Massachusetts, USA
| | - Tingxi Wu
- Department of Microbiology, The Forsyth Institute, Cambridge, Massachusetts, USA
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16
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Chen L, Wang B, Liu J, Wu X, Xu X, Cao H, Ji X, Zhang P, Li X, Hou Z, Li H. Different oral and gut microbial profiles in those with Alzheimer's disease consuming anti-inflammatory diets. Front Nutr 2022; 9:974694. [PMID: 36185672 PMCID: PMC9521405 DOI: 10.3389/fnut.2022.974694] [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: 06/21/2022] [Accepted: 08/15/2022] [Indexed: 12/06/2022] Open
Abstract
The number of people living with Alzheimer's disease (AD) is increasing alongside with aging of the population. Systemic chronic inflammation and microbial imbalance may play an important role in the pathogenesis of AD. Inflammatory diets regulate both the host microbiomes and inflammatory status. This study aimed to explore the impact of inflammatory diets on oral-gut microbes in patients with AD and the relationship between microbes and markers of systemic inflammation. The dietary inflammatory properties and the oral and gut microorganisms were analyzed using the dietary inflammatory index (DII) and 16S RNA in 60 patients with AD. The α-diversity was not related to the DII (p > 0.05), whereas the β-diversity was different in the oral microbiomes (R2 = 0.061, p = 0.013). In the most anti-inflammatory diet group, Prevotella and Olsenella were more abundant in oral microbiomes and Alistipes, Ruminococcus, Odoribacter, and unclassified Firmicutes were in the gut microbiomes (p < 0.05). Specific oral and gut genera were associated with interleukin-6 (IL)-6, complement 3 (C3), high-sensitivity C-reactive protein (hs-CRP), IL-1β, IL-4, IL-10, IL-12, and tumor necrosis factor-α (TNF-α) (p < 0.05). In conclusion, anti-inflammatory diets seem to be associated with increased abundance of beneficial microbes, and specific oral and gut microbial composition was associated with inflammatory markers.
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Affiliation(s)
- Lili Chen
- Shengli Clinical Medical College of Fujian Medical University, Fuzhou, China
- The School of Nursing, Fujian Medical University, Fuzhou, China
- Fujian Provincial Hospital, Fuzhou, China
- Lili Chen
| | - Bixia Wang
- The School of Nursing, Fujian Medical University, Fuzhou, China
| | - Jinxiu Liu
- The School of Nursing, Fujian Medical University, Fuzhou, China
| | - Xiaoqi Wu
- Fujian University of Traditional Chinese Medicine, Fuzhou, China
| | - Xinhua Xu
- The School of Nursing, Fujian Medical University, Fuzhou, China
| | - Huizhen Cao
- Shengli Clinical Medical College of Fujian Medical University, Fuzhou, China
- Fujian Provincial Hospital, Fuzhou, China
| | - Xinli Ji
- The School of Nursing, Fujian Medical University, Fuzhou, China
| | - Ping Zhang
- The School of Nursing, Fujian Medical University, Fuzhou, China
| | - Xiuli Li
- The School of Nursing, Fujian Medical University, Fuzhou, China
| | - Zhaoyi Hou
- The School of Nursing, Fujian Medical University, Fuzhou, China
| | - Hong Li
- Shengli Clinical Medical College of Fujian Medical University, Fuzhou, China
- The School of Nursing, Fujian Medical University, Fuzhou, China
- Fujian Provincial Hospital, Fuzhou, China
- *Correspondence: Hong Li
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17
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Ma R, Hou R, Guo JL, Zhang XY, Cao SJ, Huang XB, Wu R, Wen YP, Zhao Q, Du SY, Lin JC, Bai Y, Yan QG, Qi DW. The Plaque Microbiota Community of Giant Panda (Ailuropoda melanoleuca) Cubs With Dental Caries. Front Cell Infect Microbiol 2022; 12:866410. [PMID: 35573790 PMCID: PMC9097603 DOI: 10.3389/fcimb.2022.866410] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2022] [Accepted: 04/04/2022] [Indexed: 11/24/2022] Open
Abstract
Dental caries severely hinders efficient access to adequate energy in wildlife. Different food supplies will develop characteristic plaque, and the microorganisms of these plaque are closely related to dental health. Here, plaque samples from panda cubs with caries and caries-free were collected for 16S rRNA high-throughput sequencing. All sequences clustered into 337 operational taxonomic units (OTUs; 97% identity), representing 268 independent species belonging to 189 genera, 98 families, 51 orders, 24 classes, and 13 phyla. Two groups shared 218 OTUs, indicating the presence of a core plaque microbiome. α diversity analysis showed that the microbial diversity in plaques with caries exceeded that of caries-free. The dominant phyla of plaque microbiota included Proteobacteria, Bacteroidetes, Firmicutes, Fusobacteria, and Actinobacteria. The dominant genera included unclassified Neisseriaceae, Actinobacillus, Lautropia, Neisseria, Porhyromonas, unclassified Pasteurellaceae, Moraxella, Streptococcus, Bergeywlla and Capnocytophaga. β diversity analysis showed that the plaque microbial community structure was different between two groups. Using LEfSe analysis, 19 differentially abundant taxa were identified as potential biomarkers. Finally, function predictions analysis showed All the energy related metabolic pathways on KEGG level 2 were enriched in caries-active group. Consistent with the mainstream caries-causing narrative, our results illuminate the lack of information regarding the oral microflora composition and function within giant panda cubs.
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Affiliation(s)
- Rui Ma
- College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, China
- Sichuan Key Laboratory of Conservation Biology for Endangered Wildlife, Chengdu Research Base of Giant Panda Breeding, Chengdu, China
- Key Laboratory of Animal Disease and Human Health of Sichuan Province, Sichuan Agricultural University, Chengdu, China
| | - Rong Hou
- Sichuan Key Laboratory of Conservation Biology for Endangered Wildlife, Chengdu Research Base of Giant Panda Breeding, Chengdu, China
| | - Jun-Liang Guo
- Sichuan Key Laboratory of Conservation Biology for Endangered Wildlife, Chengdu Research Base of Giant Panda Breeding, Chengdu, China
| | - Xiu-Yue Zhang
- Key Laboratory of Bio-Resources and Eco-Environment, Ministry of Education, College of Life Science, Sichuan University, Chengdu, China
| | - San-Jie Cao
- Key Laboratory of Animal Disease and Human Health of Sichuan Province, Sichuan Agricultural University, Chengdu, China
| | - Xiao-Bo Huang
- Key Laboratory of Animal Disease and Human Health of Sichuan Province, Sichuan Agricultural University, Chengdu, China
| | - Rui Wu
- Key Laboratory of Animal Disease and Human Health of Sichuan Province, Sichuan Agricultural University, Chengdu, China
| | - Yi-Ping Wen
- Key Laboratory of Animal Disease and Human Health of Sichuan Province, Sichuan Agricultural University, Chengdu, China
| | - Qin Zhao
- Key Laboratory of Animal Disease and Human Health of Sichuan Province, Sichuan Agricultural University, Chengdu, China
| | - Sen-Yan Du
- Key Laboratory of Animal Disease and Human Health of Sichuan Province, Sichuan Agricultural University, Chengdu, China
| | - Ju-Chun Lin
- Key Laboratory of Animal Disease and Human Health of Sichuan Province, Sichuan Agricultural University, Chengdu, China
| | - Yu Bai
- Key Laboratory of Animal Disease and Human Health of Sichuan Province, Sichuan Agricultural University, Chengdu, China
| | - Qi-Gui Yan
- College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, China
- Key Laboratory of Animal Disease and Human Health of Sichuan Province, Sichuan Agricultural University, Chengdu, China
- *Correspondence: Dun-Wu Qi, ; Qi-Gui Yan,
| | - Dun-Wu Qi
- Sichuan Key Laboratory of Conservation Biology for Endangered Wildlife, Chengdu Research Base of Giant Panda Breeding, Chengdu, China
- *Correspondence: Dun-Wu Qi, ; Qi-Gui Yan,
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18
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Periodontitis, Metabolic and Gastrointestinal Tract Diseases: Current Perspectives on Possible Pathogenic Connections. J Pers Med 2022; 12:jpm12030341. [PMID: 35330341 PMCID: PMC8955434 DOI: 10.3390/jpm12030341] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2022] [Revised: 02/21/2022] [Accepted: 02/22/2022] [Indexed: 12/24/2022] Open
Abstract
Comprehensive research conducted over the past decades has shown that there is a definite connection between periodontal and systemic conditions, leading to the development and consolidation of the “periodontal medicine” concept. The 2018 classification of periodontal conditions uses this concept as a key element of the precise diagnosis of and individualized therapeutical protocols for periodontitis patients. The topic of this review is the pathogenic connections that exist between periodontal disease and metabolic/digestive tract conditions. It is important to remember that the oral cavity is a key element of the digestive tract and that any conditions affecting its integrity and function (such as periodontitis or oral cancer) can have a significant impact on the metabolic and gastrointestinal status of a patient. Thus, significant diseases with links to metabolic or digestive disruptions were chosen for inclusion in the review, such as diabetes mellitus, hepatic conditions and gastric cancers. Periodontal pathogenic mechanisms share several significant elements with these conditions, including mutual pro-inflammatory mediators, bacterial elements and genetic predisposition. Consequently, periodontal screening should be recommended for affected patients, and conversely, periodontitis patients should be considered for careful monitoring of their metabolic and digestive status.
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19
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Thomas SC, Xu F, Pushalkar S, Lin Z, Thakor N, Vardhan M, Flaminio Z, Khodadadi-Jamayran A, Vasconcelos R, Akapo A, Queiroz E, Bederoff M, Janal MN, Guo Y, Aguallo D, Gordon T, Corby PM, Kamer AR, Li X, Saxena D. Electronic Cigarette Use Promotes a Unique Periodontal Microbiome. mBio 2022; 13:e0007522. [PMID: 35189698 PMCID: PMC8903898 DOI: 10.1128/mbio.00075-22] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2022] [Accepted: 01/28/2022] [Indexed: 12/15/2022] Open
Abstract
Electronic cigarettes (e-cigs) have become prevalent as an alternative to conventional cigarette smoking, particularly in youth. E-cig aerosols contain unique chemicals which alter the oral microbiome and promote dysbiosis in ways we are just beginning to investigate. We conducted a 6-month longitudinal study involving 84 subjects who were either e-cig users, conventional smokers, or nonsmokers. Periodontal condition, cytokine levels, and subgingival microbial community composition were assessed, with periodontal, clinical, and cytokine measures reflecting cohort habit and positively correlating with pathogenic taxa (e.g., Treponema, Saccharibacteria, and Porphyromonas). α-Diversity increased similarly across cohorts longitudinally, yet each cohort maintained a unique microbiome. The e-cig microbiome shared many characteristics with the microbiome of conventional smokers and some with nonsmokers, yet it maintained a unique subgingival microbial community enriched in Fusobacterium and Bacteroidales (G-2). Our data suggest that e-cig use promotes a unique periodontal microbiome, existing as a stable heterogeneous state between those of conventional smokers and nonsmokers and presenting unique oral health challenges. IMPORTANCE Electronic cigarette (e-cig) use is gaining in popularity and is often perceived as a healthier alternative to conventional smoking. Yet there is little evidence of the effects of long-term use of e-cigs on oral health. Conventional cigarette smoking is a prominent risk factor for the development of periodontitis, an oral disease affecting nearly half of adults over 30 years of age in the United States. Periodontitis is initiated through a disturbance in the microbial biofilm communities inhabiting the unique space between teeth and gingival tissues. This disturbance instigates host inflammatory and immune responses and, if left untreated, leads to tooth and bone loss and systemic diseases. We found that the e-cig user's periodontal microbiome is unique, eliciting unique host responses. Yet some similarities to the microbiomes of both conventional smokers and nonsmokers exist, with strikingly more in common with that of cigarette smokers, suggesting that there is a unique periodontal risk associated with e-cig use.
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Affiliation(s)
- Scott C. Thomas
- Department of Molecular Pathobiology, New York University College of Dentistry, New York, New York, USA
| | - Fangxi Xu
- Department of Molecular Pathobiology, New York University College of Dentistry, New York, New York, USA
| | - Smruti Pushalkar
- Department of Molecular Pathobiology, New York University College of Dentistry, New York, New York, USA
| | - Ziyan Lin
- Applied Bioinformatics Labs, New York University School of Medicine, New York, New York, USA
| | - Nirali Thakor
- Department of Molecular Pathobiology, New York University College of Dentistry, New York, New York, USA
| | - Mridula Vardhan
- Department of Molecular Pathobiology, New York University College of Dentistry, New York, New York, USA
| | - Zia Flaminio
- Department of Molecular Pathobiology, New York University College of Dentistry, New York, New York, USA
| | | | - Rebeca Vasconcelos
- Department of Molecular Pathobiology, New York University College of Dentistry, New York, New York, USA
| | - Adenike Akapo
- Department of Molecular Pathobiology, New York University College of Dentistry, New York, New York, USA
| | - Erica Queiroz
- Department of Molecular Pathobiology, New York University College of Dentistry, New York, New York, USA
| | - Maria Bederoff
- Department of Molecular Pathobiology, New York University College of Dentistry, New York, New York, USA
| | - Malvin N. Janal
- Department of Epidemiology & Health Promotion, New York University College of Dentistry, New York, New York, USA
| | - Yuqi Guo
- Department of Molecular Pathobiology, New York University College of Dentistry, New York, New York, USA
| | - Deanna Aguallo
- Department of Molecular Pathobiology, New York University College of Dentistry, New York, New York, USA
| | - Terry Gordon
- Department of Environmental Medicine, New York University School of Medicine, New York, New York, USA
| | - Patricia M. Corby
- Department of Oral Medicine, School of Dental Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Angela R. Kamer
- Department of Periodontology and Implant Dentistry, New York University College of Dentistry, New York, New York, USA
| | - Xin Li
- Department of Molecular Pathobiology, New York University College of Dentistry, New York, New York, USA
| | - Deepak Saxena
- Department of Molecular Pathobiology, New York University College of Dentistry, New York, New York, USA
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20
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Mirzaei R, Sabokroo N, Ahmadyousefi Y, Motamedi H, Karampoor S. Immunometabolism in biofilm infection: lessons from cancer. Mol Med 2022; 28:10. [PMID: 35093033 PMCID: PMC8800364 DOI: 10.1186/s10020-022-00435-2] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2021] [Accepted: 01/10/2022] [Indexed: 12/11/2022] Open
Abstract
BACKGROUND Biofilm is a community of bacteria embedded in an extracellular matrix, which can colonize different human cells and tissues and subvert the host immune reactions by preventing immune detection and polarizing the immune reactions towards an anti-inflammatory state, promoting the persistence of biofilm-embedded bacteria in the host. MAIN BODY OF THE MANUSCRIPT It is now well established that the function of immune cells is ultimately mediated by cellular metabolism. The immune cells are stimulated to regulate their immune functions upon sensing danger signals. Recent studies have determined that immune cells often display distinct metabolic alterations that impair their immune responses when triggered. Such metabolic reprogramming and its physiological implications are well established in cancer situations. In bacterial infections, immuno-metabolic evaluations have primarily focused on macrophages and neutrophils in the planktonic growth mode. CONCLUSION Based on differences in inflammatory reactions of macrophages and neutrophils in planktonic- versus biofilm-associated bacterial infections, studies must also consider the metabolic functions of immune cells against biofilm infections. The profound characterization of the metabolic and immune cell reactions could offer exciting novel targets for antibiofilm therapy.
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Affiliation(s)
- Rasoul Mirzaei
- Department of Microbiology, School of Medicine, Hamadan University of Medical Sciences, Hamadan, Iran.
- Venom and Biotherapeutics Molecules Lab, Medical Biotechnology Department, Biotechnology Research Center, Pasteur Institute of Iran, Tehran, Iran.
| | - Niloofar Sabokroo
- Department of Microbiology, School of Medicine, Shahid Sadoughi University of Medical Sciences, Yazd, Iran
| | - Yaghoub Ahmadyousefi
- Department of Medical Biotechnology, School of Advanced Medical Sciences and Technologies, Hamadan University of Medical Sciences, Hamadan, Iran
- Research Center for Molecular Medicine, School of Medicine, Hamadan University of Medical Sciences, Hamadan, Iran
| | - Hamid Motamedi
- Department of Microbiology, School of Medicine, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - Sajad Karampoor
- Gastrointestinal and Liver Diseases Research Center, Iran University of Medical Sciences, Tehran, Iran.
- Department of Virology, School of Medicine, Iran University of Medical Sciences, Tehran, Iran.
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21
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Zhao L, Cho WC, Nicolls MR. Colorectal Cancer-Associated Microbiome Patterns and Signatures. Front Genet 2022; 12:787176. [PMID: 35003221 PMCID: PMC8729777 DOI: 10.3389/fgene.2021.787176] [Citation(s) in RCA: 21] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2021] [Accepted: 12/07/2021] [Indexed: 01/02/2023] Open
Abstract
The gut microbiome is dynamic and shaped by diet, age, geography, and environment. The disruption of normal gut microbiota (dysbiosis) is closely related to colorectal cancer (CRC) risk and progression. To better identify and characterize CRC-associated dysbiosis, we collected six independent cohorts with matched normal pairs (when available) for comparison and exploration of the microbiota and their interactions with the host. Comparing the microbial community compositions between cancerous and adjacent noncancerous tissues, we found that more microbes were depleted than enriched in tumors. Despite taxonomic variations among cohorts, consistent depletion of normal microbiota (members of Clostridia and Bacteroidia) and significant enrichment of oral-originated pathogens (such as Fusobacterium nucleatum and Parvimonas micra) were observed in CRC compared to normal tissues. Sets of hub and hub-connecting microbes were subsequently identified to infer microbe-microbe interaction networks in CRC. Furthermore, biclustering was used for identifying coherent patterns between patients and microbes. Two patient-microbe interaction patterns, named P0 and P1, can be consistently identified among the investigated six CRC cohorts. Characterization of the microbial community composition of the two patterns revealed that patients in P0 and P1 differed significantly in microbial alpha and beta diversity, and CRC‐associated microbiota changes consist of continuous populations of widespread taxa rather than discrete enterotypes. In contrast to the P0, the patients in P1 have reduced microbial alpha diversity compared to the adjacent normal tissues, and P1 possesses more oral-related pathogens than P0 and controls. Collectively, our study investigated the CRC-associated microbiome changes, and identified reproducible microbial signatures across multiple independent cohorts. More importantly, we revealed that the CRC heterogeneity can be partially attributed to the variety and compositional differences of microbes and their interactions to humans.
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Affiliation(s)
- Lan Zhao
- Department of Medicine, Stanford University School of Medicine, Stanford, CA, United States.,VA Palo Alto Health Care System, Palo Alto, CA, United States
| | - William C Cho
- Department of Clinical Oncology, Queen Elizabeth Hospital, Hong Kong, China
| | - Mark R Nicolls
- Department of Medicine, Stanford University School of Medicine, Stanford, CA, United States.,VA Palo Alto Health Care System, Palo Alto, CA, United States
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22
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Baştuğ AY, Tomruk CÖ, Güzel E, Özdemir İ, Duygu G, Kütan E, Ülker GMY, Arıcı FÖ. The effect of local application of thymoquinone, Nigella sativa’s bioactive component, on bone healing in experimental bone defects infected with Porphyromonas gingivalis. J Periodontal Implant Sci 2022; 52:206-219. [PMID: 35775696 PMCID: PMC9253281 DOI: 10.5051/jpis.2101360068] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2021] [Revised: 09/23/2021] [Accepted: 10/20/2021] [Indexed: 11/18/2022] Open
Abstract
Purpose This study was performed to evaluate the influence of local application of thymoquinone (TQ) on bone healing in experimental bone defects infected with Porphyromonas gingivalis (PG). Methods Forty-two female rats were randomly divided into 6 groups. A bone defect was created on the right tibia of all animals. The PG, PG/collagen membrane (COL) and PG/TQ/COL groups were infected with PG. In the COL and PG/COL groups, the defects were covered with a COL; in the TQ/COL and PG/TQ/COL groups, the defects were covered with a TQ-containing COL. After 28 days, all animals were sacrificed. Quantitative measurements of new bone formation and osteoblast lining, as well as semiquantitative measurements of capillary density and tissue response, were analyzed. Furthermore, the presence of bacterial infections in defect areas was evaluated. Results The new bone formation, osteoblast number, and capillary density were significantly higher in the TQ groups than in the control groups (P<0.001, P<0.001, and P<0.01, respectively). In a comparison between the TQ/COL group, with a TQ-containing COL (TQ/COL), and the PG–infected TQ-containing COL (PG/TQ/COL) group, the newly formed bone and capillary density were higher in the TQ/COL group (P<0.01). When the control group was compared to the PG, PG/COL, and PG/TQ/COL groups in terms of tissue response, the differences were statistically significant (P<0.001, P=0.02, and P=0.041, respectively). The intensity of the inflammatory cell reaction was higher in the PG, PG/COL, and PG/TQ/COL groups (P<0.05). Conclusions Within the limitations of this study, the local application of a TQ-containing COL positively affected bone healing even if the bone defects were infected. The results suggest that TQ increased angiogenesis and showed promise for accelerating bone defect healing. Further research is warranted to support these findings and reach more definitive conclusions.
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Affiliation(s)
- Ayşe Yılmaz Baştuğ
- Vocational School of Health Services, Orodental Health Sciences, Istanbul Gelişim University, Istanbul, Turkey
| | - Ceyda Özçakır Tomruk
- Department of Oral and Maxillofacial Surgery, Yeditepe University Faculty of Dentistry, Istanbul, Turkey
| | - Elif Güzel
- Department of Histology and Embryology, Istanbul University-Cerrahpasa Medical Faculty, Istanbul, Turkey
| | - İlkay Özdemir
- Department of Histology and Embryology, Istanbul University Medical Faculty, Istanbul, Turkey
| | - Gonca Duygu
- Department of Oral and Maxillofacial Surgery, Tekirdag Namik Kemal University Faculty of Dentistry, Tekirdag, Turkey
| | | | - Gül Merve Yalçın Ülker
- Department of Oral and Maxillofacial Surgery, Istanbul Okan University Faculty of Dentistry, Istanbul, Turkey
| | - Fatma Özen Arıcı
- Biotechnology Program, Graduate School of Natural and Applied Sciences, Yeditepe University, Istanbul, Turkey
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23
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Ren Q, Wei F, Yuan C, Zhu C, Zhang Q, Quan J, Sun X, Zheng S. The effects of removing dead bacteria by propidium monoazide on the profile of salivary microbiome. BMC Oral Health 2021; 21:460. [PMID: 34551743 PMCID: PMC8456568 DOI: 10.1186/s12903-021-01832-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2021] [Accepted: 09/16/2021] [Indexed: 12/22/2022] Open
Abstract
Background Oral microbiome played an important role in maintaining healthy state and might exhibit certain changes under circumstances of diseases. However, current microbiological research using sequencing techniques did not regard dead bacteria as a separate part, causing findings based on subsequent analyses on dynamic equilibrium and functional pathways of microbes somewhat questionable. Since treatment by propidium monoazide (PMA) was able to remove dead bacteria effectively, it would be worth studying how the sequencing results after PMA treatment differed from those focusing on the whole microbiota. Methods Unstimulated whole saliva samples were obtained from 18 healthy people from 3 age groups (children, adults, and the elderly). After removal of dead bacteria by propidium monoazide (PMA), changes in the profile of salivary microbiome were detected using 16S rRNA sequencing technology, and differences among age groups were compared subsequently. Results Dead bacteria accounted for nearly a half of the whole bacteria flora in saliva, while freezing had little effect on the proportion of deaths. After treatment with PMA, the numbers of OTUs reduced by 4.4–14.2%, while the Shannon diversity indices decreased significantly (P < 0.01). Only 35.2% of positive and 6.1% of negative correlations were found to be shared by the whole microbiota and that with dead bacteria removed. Differences in significantly changed OTUs and functional pathways among different age groups were also observed between the group of PMA and the control. Conclusions It was necessary to take the influence of living state of bacteria into account in analytic studies of salivary microbiome. Supplementary Information The online version contains supplementary material available at 10.1186/s12903-021-01832-5.
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Affiliation(s)
- Qidi Ren
- Department of Preventive Dentistry, Peking University School and Hospital of Stomatology & National Center of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Laboratory for Digital and Material Technology of Stomatology, Beijing, People's Republic of China
| | - Fangqiao Wei
- Department of Preventive Dentistry, Peking University School and Hospital of Stomatology & National Center of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Laboratory for Digital and Material Technology of Stomatology, Beijing, People's Republic of China
| | - Chao Yuan
- Department of Preventive Dentistry, Peking University School and Hospital of Stomatology & National Center of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Laboratory for Digital and Material Technology of Stomatology, Beijing, People's Republic of China
| | - Ce Zhu
- Department of Preventive Dentistry, Peking University School and Hospital of Stomatology & National Center of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Laboratory for Digital and Material Technology of Stomatology, Beijing, People's Republic of China.,Department of Preventive Dentistry, Shanghai Jiao Tong University School of Dentistry, Shanghai Ninth People's Hospital, Shanghai, People's Republic of China
| | - Qian Zhang
- Central Laboratory, Peking University School and Hospital of Stomatology & National Center of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Laboratory for Digital and Material Technology of Stomatology, Beijing, People's Republic of China
| | - Junkang Quan
- Department of Preventive Dentistry, Peking University School and Hospital of Stomatology & National Center of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Laboratory for Digital and Material Technology of Stomatology, Beijing, People's Republic of China
| | - Xiangyu Sun
- Department of Preventive Dentistry, Peking University School and Hospital of Stomatology & National Center of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Laboratory for Digital and Material Technology of Stomatology, Beijing, People's Republic of China.
| | - Shuguo Zheng
- Department of Preventive Dentistry, Peking University School and Hospital of Stomatology & National Center of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Laboratory for Digital and Material Technology of Stomatology, Beijing, People's Republic of China.
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24
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Ticlla MR, Hella J, Hiza H, Sasamalo M, Mhimbira F, Rutaihwa LK, Droz S, Schaller S, Reither K, Hilty M, Comas I, Beisel C, Schmid CD, Fenner L, Gagneux S. The Sputum Microbiome in Pulmonary Tuberculosis and Its Association With Disease Manifestations: A Cross-Sectional Study. Front Microbiol 2021; 12:633396. [PMID: 34489876 PMCID: PMC8417804 DOI: 10.3389/fmicb.2021.633396] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2020] [Accepted: 07/09/2021] [Indexed: 12/31/2022] Open
Abstract
Each day, approximately 27,000 people become ill with tuberculosis (TB), and 4,000 die from this disease. Pulmonary TB is the main clinical form of TB, and affects the lungs with a considerably heterogeneous manifestation among patients. Immunomodulation by an interplay of host-, environment-, and pathogen-associated factors partially explains such heterogeneity. Microbial communities residing in the host's airways have immunomodulatory effects, but it is unclear if the inter-individual variability of these microbial communities is associated with the heterogeneity of pulmonary TB. Here, we investigated this possibility by characterizing the microbial composition in the sputum of 334 TB patients from Tanzania, and by assessing its association with three aspects of disease manifestations: sputum mycobacterial load, severe clinical findings, and chest x-ray (CXR) findings. Compositional data analysis of taxonomic profiles based on 16S-rRNA gene amplicon sequencing and on whole metagenome shotgun sequencing, and graph-based inference of microbial associations revealed that the airway microbiome of TB patients was shaped by inverse relationships between Streptococcus and two anaerobes: Selenomonas and Fusobacterium. Specifically, the strength of these microbial associations was negatively correlated with Faith's phylogenetic diversity (PD) and with the accumulation of transient genera. Furthermore, low body mass index (BMI) determined the association between abnormal CXRs and community diversity and composition. These associations were mediated by increased abundance of Selenomonas and Fusobacterium, relative to the abundance of Streptococcus, in underweight patients with lung parenchymal infiltrates and in comparison to those with normal chest x-rays. And last, the detection of herpesviruses and anelloviruses in sputum microbial assemblage was linked to co-infection with HIV. Given the anaerobic metabolism of Selenomonas and Fusobacterium, and the hypoxic environment of lung infiltrates, our results suggest that in underweight TB patients, lung tissue remodeling toward anaerobic conditions favors the growth of Selenomonas and Fusobacterium at the expense of Streptococcus. These new insights into the interplay among particular members of the airway microbiome, BMI, and lung parenchymal lesions in TB patients, add a new dimension to the long-known association between low BMI and pulmonary TB. Our results also drive attention to the airways virome in the context of HIV-TB coinfection.
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Affiliation(s)
- Monica R Ticlla
- Swiss Tropical and Public Health Institute, Basel, Switzerland.,University of Basel, Basel, Switzerland.,Swiss Institute of Bioinformatics, Lausanne, Switzerland
| | - Jerry Hella
- University of Basel, Basel, Switzerland.,Ifakara Health Institute, Dar es Salaam, Tanzania
| | - Hellen Hiza
- Ifakara Health Institute, Dar es Salaam, Tanzania
| | | | | | - Liliana K Rutaihwa
- Swiss Tropical and Public Health Institute, Basel, Switzerland.,University of Basel, Basel, Switzerland.,Ifakara Health Institute, Dar es Salaam, Tanzania
| | - Sara Droz
- Institute for Infectious Diseases, University of Bern, Bern, Switzerland
| | - Sarah Schaller
- Institute for Infectious Diseases, University of Bern, Bern, Switzerland
| | - Klaus Reither
- Swiss Tropical and Public Health Institute, Basel, Switzerland.,University of Basel, Basel, Switzerland
| | - Markus Hilty
- Institute for Infectious Diseases, University of Bern, Bern, Switzerland
| | - Inaki Comas
- Tuberculosis Genomics Unit, Biomedicine Institute of Valencia, Valencia, Spain
| | - Christian Beisel
- Department of Biosystems Science and Engineering, ETH Zurich, Basel, Switzerland
| | - Christoph D Schmid
- Swiss Tropical and Public Health Institute, Basel, Switzerland.,University of Basel, Basel, Switzerland.,Swiss Institute of Bioinformatics, Lausanne, Switzerland
| | - Lukas Fenner
- Swiss Tropical and Public Health Institute, Basel, Switzerland.,University of Basel, Basel, Switzerland.,Swiss Institute of Bioinformatics, Lausanne, Switzerland.,Institute of Social and Preventive Medicine, University of Bern, Bern, Switzerland
| | - Sebastien Gagneux
- Swiss Tropical and Public Health Institute, Basel, Switzerland.,University of Basel, Basel, Switzerland
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25
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Blank E, Grischke J, Winkel A, Eberhard J, Kommerein N, Doll K, Yang I, Stiesch M. Evaluation of biofilm colonization on multi-part dental implants in a rat model. BMC Oral Health 2021; 21:313. [PMID: 34144677 PMCID: PMC8212458 DOI: 10.1186/s12903-021-01665-2] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2021] [Accepted: 06/02/2021] [Indexed: 01/15/2023] Open
Abstract
BACKGROUND Peri-implant mucositis and peri-implantitis are highly prevalent biofilm-associated diseases affecting the tissues surrounding dental implants. As antibiotic treatment is ineffective to fully cure biofilm mediated infections, antimicrobial modifications of implants to reduce or prevent bacterial colonization are called for. Preclinical in vivo evaluation of the functionality of new or modified implant materials concerning bacterial colonization and peri-implant health is needed to allow progress in this research field. For this purpose reliable animal models are needed. METHODS Custom made endosseous dental implants were installed in female Sprague Dawley rats following a newly established three-step implantation procedure. After healing of the bone and soft tissue, the animals were assigned to two groups. Group A received a continuous antibiotic treatment for 7 weeks, while group B was repeatedly orally inoculated with human-derived strains of Streptococcus oralis, Fusobacterium nucleatum and Porphyromonas gingivalis for six weeks, followed by 1 week without inoculation. At the end of the experiment, implantation sites were clinically assessed and biofilm colonization was quantified via confocal laser scanning microscopy. Biofilm samples were tested for presence of the administered bacteria via PCR analysis. RESULTS The inner part of the custom made implant screw could be identified as a site of reliable biofilm formation in vivo. S. oralis and F. nucleatum were detectable only in the biofilm samples from group B animals. P. gingivalis was not detectable in samples from either group. Quantification of the biofilm volume on the implant material revealed no statistically significant differences between the treatment groups. Clinical inspection of implants in group B animals showed signs of mild to moderate peri-implant mucositis (4 out of 6) whereas the mucosa of group A animals appeared healthy (8/8). The difference in the mucosa health status between the treatment groups was statistically significant (p = 0.015). CONCLUSIONS We developed a new rodent model for the preclinical evaluation of dental implant materials with a special focus on the early biofilm colonization including human-derived oral bacteria. Reliable biofilm quantification on the implant surface and the symptoms of peri-implant mucositis of the bacterially inoculated animals will serve as a readout for experimental evaluation of biofilm-reducing modifications of implant materials.
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Affiliation(s)
- Eva Blank
- Department of Dental Prosthetics and Biomedical Materials Science, Hannover Medical School, Carl-Neuberg-Str. 1, 30625, Hannover, Germany.
- Lower Saxony Centre for Biomedical Engineering, Implant Research and Development (NIFE), Stadtfelddamm 34, 30625, Hannover, Germany.
| | - Jasmin Grischke
- Department of Dental Prosthetics and Biomedical Materials Science, Hannover Medical School, Carl-Neuberg-Str. 1, 30625, Hannover, Germany
- Lower Saxony Centre for Biomedical Engineering, Implant Research and Development (NIFE), Stadtfelddamm 34, 30625, Hannover, Germany
| | - Andreas Winkel
- Department of Dental Prosthetics and Biomedical Materials Science, Hannover Medical School, Carl-Neuberg-Str. 1, 30625, Hannover, Germany
- Lower Saxony Centre for Biomedical Engineering, Implant Research and Development (NIFE), Stadtfelddamm 34, 30625, Hannover, Germany
| | - Joerg Eberhard
- The University of Sydney Dental School & The Charles Perkins Centre, Faculty of Medicine and Health, The University of Sydney, Sydney, NSW, Australia
| | - Nadine Kommerein
- Department of Dental Prosthetics and Biomedical Materials Science, Hannover Medical School, Carl-Neuberg-Str. 1, 30625, Hannover, Germany
- Lower Saxony Centre for Biomedical Engineering, Implant Research and Development (NIFE), Stadtfelddamm 34, 30625, Hannover, Germany
| | - Katharina Doll
- Department of Dental Prosthetics and Biomedical Materials Science, Hannover Medical School, Carl-Neuberg-Str. 1, 30625, Hannover, Germany
- Lower Saxony Centre for Biomedical Engineering, Implant Research and Development (NIFE), Stadtfelddamm 34, 30625, Hannover, Germany
| | - Ines Yang
- Department of Dental Prosthetics and Biomedical Materials Science, Hannover Medical School, Carl-Neuberg-Str. 1, 30625, Hannover, Germany
- Lower Saxony Centre for Biomedical Engineering, Implant Research and Development (NIFE), Stadtfelddamm 34, 30625, Hannover, Germany
| | - Meike Stiesch
- Department of Dental Prosthetics and Biomedical Materials Science, Hannover Medical School, Carl-Neuberg-Str. 1, 30625, Hannover, Germany
- Lower Saxony Centre for Biomedical Engineering, Implant Research and Development (NIFE), Stadtfelddamm 34, 30625, Hannover, Germany
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Microbial Screening Reveals Oral Site-Specific Locations of the Periodontal Pathogen Selenomonas noxia. Curr Issues Mol Biol 2021; 43:353-364. [PMID: 34204609 PMCID: PMC8929098 DOI: 10.3390/cimb43010029] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2021] [Revised: 06/05/2021] [Accepted: 06/10/2021] [Indexed: 12/29/2022] Open
Abstract
INTRODUCTION Selenomonas noxia (SN) is an important periodontal pathogen, associated with gingivitis and periodontitis. Many studies have found associations between SN and indicators of poor health outcomes, such as smoking, low socioeconomic status and obesity. However, less is known about the prevalence of this organism and more specifically about other oral site-specific locations that may harbor this organism. METHODS Using an existing patient repository (n = 47) of DNA isolated from saliva and other oral sites (n = 235), including the dorsum of the tongue, lower lingual incisor, upper buccal molar and gingival crevicular fluid (GCF), molecular screening for SN was performed. Screening results were analyzed for associations between demographic variables (age, sex, race/ethnicity) and clinical information (body mass index or BMI, presence of orthodontic brackets, primary/mixed/permanent dentition). RESULTS qPCR screening revealed a total of n = 62/235 sites or 26.3% harboring SN with saliva and GCF (either alone or in combination with one or more sites) most often observed (Saliva, n = 23/27 or 85.18%, GCF, n = 14/27 or 51%). Analysis of site-specific data revealed most positive results were found among saliva and GCF alone or in combination, with fewer positive results observed among the tongue (33.3%), lower lingual incisor (29.6%), and upper buccal molar (25.9%). No significant associations were found between demographic or clinical variables and presence of SN at any site. CONCLUSIONS These results may be among the first to describe site-specific locations of S. noxia among various additional oral biofilm sites. These data may represent a significant advancement in our understanding of the sites and locations that harbor this organism, which may be important for our understanding of the prevalence and distribution of these organisms among patients of different ages undergoing different types of oral treatments, such as orthodontic treatment or therapy.
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27
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Del Giudice C, Vaia E, Liccardo D, Marzano F, Valletta A, Spagnuolo G, Ferrara N, Rengo C, Cannavo A, Rengo G. Infective Endocarditis: A Focus on Oral Microbiota. Microorganisms 2021; 9:1218. [PMID: 34199916 PMCID: PMC8227130 DOI: 10.3390/microorganisms9061218] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2021] [Revised: 05/17/2021] [Accepted: 06/02/2021] [Indexed: 02/06/2023] Open
Abstract
Infective endocarditis (IE) is an inflammatory disease usually caused by bacteria entering the bloodstream and settling in the heart lining valves or blood vessels. Despite modern antimicrobial and surgical treatments, IE continues to cause substantial morbidity and mortality. Thus, primary prevention and enhanced diagnosis remain the most important strategies to fight this disease. In this regard, it is worth noting that for over 50 years, oral microbiota has been considered one of the significant risk factors for IE. Indeed, among the disparate recommendations from the American heart association and the European Society of Cardiology, there are good oral hygiene and prophylaxis for high-risk patients undergoing dental procedures. Thus, significant interest has grown in the role of oral microbiota and it continues to be a subject of research interest, especially if we consider that antimicrobial treatments can generate drug-resistant mutant bacteria, becoming a severe social problem. This review will describe the current knowledge about the relationship between oral microbiota, dental procedures, and IE. Further, it will discuss current methods used to prevent IE cases that originate from oral pathogens and how these should be focused on improving oral hygiene, which remains the significant persuasible way to prevent bacteremia and systemic disorders.
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Affiliation(s)
- Carmela Del Giudice
- Department of Neurosciences, Reproductive and Odontostomatological Sciences, Federico II University of Naples, 80131 Naples, Italy; (C.D.G.); (E.V.); (A.V.); (G.S.)
| | - Emanuele Vaia
- Department of Neurosciences, Reproductive and Odontostomatological Sciences, Federico II University of Naples, 80131 Naples, Italy; (C.D.G.); (E.V.); (A.V.); (G.S.)
| | - Daniela Liccardo
- Department of Translational Medical Sciences, Medicine Federico II University of Naples, 80131 Naples, Italy; (D.L.); (N.F.); (G.R.)
| | - Federica Marzano
- Department of Advanced Biomedical Sciences, University of Naples Federico II, 80131 Naples, Italy;
| | - Alessandra Valletta
- Department of Neurosciences, Reproductive and Odontostomatological Sciences, Federico II University of Naples, 80131 Naples, Italy; (C.D.G.); (E.V.); (A.V.); (G.S.)
| | - Gianrico Spagnuolo
- Department of Neurosciences, Reproductive and Odontostomatological Sciences, Federico II University of Naples, 80131 Naples, Italy; (C.D.G.); (E.V.); (A.V.); (G.S.)
- Institute of Dentistry, I. M. Sechenov First Moscow State Medical University, 119435 Moscow, Russia
| | - Nicola Ferrara
- Department of Translational Medical Sciences, Medicine Federico II University of Naples, 80131 Naples, Italy; (D.L.); (N.F.); (G.R.)
- Istituti Clinici Scientifici ICS-Maugeri, 82037 Telese Terme, Italy
| | - Carlo Rengo
- Department of Prosthodontics and Dental Materials, School of Dental Medicine, University of Siena, 53100 Siena, Italy;
| | - Alessandro Cannavo
- Department of Translational Medical Sciences, Medicine Federico II University of Naples, 80131 Naples, Italy; (D.L.); (N.F.); (G.R.)
| | - Giuseppe Rengo
- Department of Translational Medical Sciences, Medicine Federico II University of Naples, 80131 Naples, Italy; (D.L.); (N.F.); (G.R.)
- Istituti Clinici Scientifici ICS-Maugeri, 82037 Telese Terme, Italy
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28
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Genetic and molecular determinants of polymicrobial interactions in Fusobacterium nucleatum. Proc Natl Acad Sci U S A 2021; 118:2006482118. [PMID: 34074747 DOI: 10.1073/pnas.2006482118] [Citation(s) in RCA: 28] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
A gram-negative colonizer of the oral cavity, Fusobacterium nucleatum not only interacts with many pathogens in the oral microbiome but also has the ability to spread to extraoral sites including placenta and amniotic fluid, promoting preterm birth. To date, however, the molecular mechanism of interspecies interactions-termed coaggregation-by F. nucleatum and how coaggregation affects bacterial virulence remain poorly defined. Here, we employed genome-wide transposon mutagenesis to uncover fusobacterial coaggregation factors, revealing the intertwined function of a two-component signal transduction system (TCS), named CarRS, and a lysine metabolic pathway in regulating the critical coaggregation factor RadD. Transcriptome analysis shows that CarR modulates a large regulon including radD and lysine metabolic genes, such as kamA and kamD, the expression of which are highly up-regulated in the ΔcarR mutant. Significantly, the native culture medium of ΔkamA or ΔkamD mutants builds up abundant amounts of free lysine, which blocks fusobacterial coaggregation with streptococci. Our demonstration that lysine-conjugated beads trap RadD from the membrane lysates suggests that lysine utilizes RadD as its receptor to act as a metabolic inhibitor of coaggregation. Lastly, using a mouse model of preterm birth, we show that fusobacterial virulence is significantly attenuated with the ΔkamA and ΔcarR mutants, in contrast to the enhanced virulence phenotype observed upon diminishing RadD (ΔradD or ΔcarS mutant). Evidently, F. nucleatum employs the TCS CarRS and environmental lysine to modulate RadD-mediated interspecies interaction, virulence, and nutrient acquisition to thrive in the adverse environment of oral biofilms and extraoral sites.
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Abstract
Ecologists have long recognized the importance of spatial scale in understanding structure-function relationships among communities of organisms within their environment. Here, we review historical and contemporary studies of dental plaque community structure in the context of three distinct scales: the micro (1-10 µm), meso (10-100 µm) and macroscale (100 µm to ≥1 cm). Within this framework, we analyze the compositional nature of dental plaque at the macroscale, the molecular interactions of microbes at the microscale, and the emergent properties of dental plaque biofilms at the mesoscale. Throughout our analysis of dental plaque across spatial scales, we draw attention to disease and health-associated structure-function relationships and include a discussion of host immune involvement in the mesoscale structure of periodontal disease-associated biofilms. We end with a discussion of two filamentous organisms, Fusobacterium nucleatum and Corynebacterium matruchotii, and their relevant contributions in structuring dental plaque biofilms.
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Affiliation(s)
| | - Alex M. Valm
- Department of Biological Sciences, The University at Albany, State University of New York, Albany, New York, USA
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Peluso EA, Scheible M, Ton-That H, Wu C. Genetic Manipulation and Virulence Assessment of Fusobacterium nucleatum. ACTA ACUST UNITED AC 2021; 57:e104. [PMID: 32539234 DOI: 10.1002/cpmc.104] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Considered a commensal, the Gram-negative anaerobe Fusobacterium nucleatum is a key member of the oral microbiome due to its wide range of interactions with many oral microbes. While the periodontal pathogenic properties of this organism have widely been examined, its connotation with extra-oral infections, including preterm birth and colorectal cancer, has now become apparent. Nonetheless, little is known about the mechanisms of pathogenicity and the associated virulence factors of F. nucleatum, most likely due to limited genetic tools and facile methodology. Here, we describe molecular techniques for the genetic manipulation of F. nucleatum, including markerless, nonpolar gene deletion, complementation, and Tn5 transposon mutagenesis. Further, we provide methodology to assess virulence potential of F. nucleatum using a mouse model of preterm birth. © 2020 Wiley Periodicals LLC. Basic Protocol 1: Generation of a galK mutant strain Basic Protocol 2: Complementation of a mutant strain Basic Protocol 3: Tn5 transposon mutagenesis of F. nucleatum Basic Protocol 4: Mouse model of preterm birth.
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Affiliation(s)
- Emily A Peluso
- Division of Oral Biology and Medicine, School of Dentistry, University of California, Los Angeles, California
| | - Matthew Scheible
- Division of Oral Biology and Medicine, School of Dentistry, University of California, Los Angeles, California
| | - Hung Ton-That
- Division of Oral Biology and Medicine, School of Dentistry, University of California, Los Angeles, California
| | - Chenggang Wu
- Department of Microbiology and Molecular Genetics, University of Texas McGovern Medical School, Houston, Texas
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Determination of the Role of Fusobacterium Nucleatum in the Pathogenesis in and Out the Mouth. ACTA ACUST UNITED AC 2021; 41:87-99. [PMID: 32573481 DOI: 10.2478/prilozi-2020-0026] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
INTRODUCTION One of the most important types of microorganisms in the oral cavity in both healthy and non-healthy individuals is Fusobacterium nucleatum. Although present as a normal resident in the oral cavity, this Gram-negative pathogen is dominant in periodontal disease and it is involved in many invasive infections in the population, acute and chronic inflammatory conditions, as well as many adverse events with a fatal outcome. AIM To determine the role of F. nucleatum in the development of polymicrobial biofilms thus pathogenic changes in and out of the oral media. MATERIAL AND METHOD A systematic review of the literature concerning the determination and role of F. nucleatum through available clinical trials, literature reviews, original research and articles published electronically at Pub Med and Google Scholar. CONCLUSION The presence of Fusobacterium nucleatum is commonly associated with the health status of individuals. These anaerobic bacteria plays a key role in oral pathological conditions and has been detected in many systemic disorders causing complex pathogenethic changes probably due to binding ability to various cells thus several virulence mechanisms. Most common diseases and conditions in the oral cavity associated with F.nucleatum are gingivitis (G), chronic periodontitis (CH), aggressive periodontitis (AgP), endo-periodental infections (E-P), chronic apical periodontitis (PCHA). The bacterium has been identified and detected in many systemic disorders such as coronary heart disease (CVD) pathological pregnancy (P); polycystic ovary syndrome (PCOS), high-risk pregnancy (HRP), colorectal cancer (CRC); pre-eclampsia (PE); rheumatoid arthritis (RA); osteoarthritis (OA).
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Na HS, Kim S, Kim S, Yu Y, Kim SY, Kim HJ, Lee JY, Lee JH, Chung J. Molecular subgroup of periodontitis revealed by integrated analysis of the microbiome and metabolome in a cross-sectional observational study. J Oral Microbiol 2021; 13:1902707. [PMID: 33828820 PMCID: PMC8008934 DOI: 10.1080/20002297.2021.1902707] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2020] [Revised: 01/27/2021] [Accepted: 03/10/2021] [Indexed: 11/29/2022] Open
Abstract
Background: Periodontitis (PT) is a multifactorial, chronic inflammatory disease that can have heterogeneous clinical presentations. The oral microbiome and its metabolites have been implicated as the causes and regulators of PT pathogenesis. In this study, we assessed the oral microbiome and its metabolome in PT patients to clarify the interactions between the microbiome and its metabolites.Methods: A total of 112 subjects were recruited. Buccal and supragingival samples were collected for microbiome analysis. Saliva samples were collected for metabolomic analyses. Microbiome and metabolome data were analyzed and further integrated for combined analysis using various bioinformatics approaches.Results: Oral metabolomic analysis identified 28 metabolites distinguishing the healthy (H) and PT groups. PT group were further clustered into two subgroups (PT_G1 and PT_G2) depending on metabolite profiles. Oral microbiome analysis revealed discriminatory bacterial species in the H, PT_G1, and PT_G2 microbiota. Interestingly, PT_G2 had significantly higher concentration of short chain fatty acids and higher abundance of pathogenic bacteria. Integrated analysis of the microbiome and metabolome showed close association.Conclusion: Our results provide evidence of a close interplay between the oral microbiome and metabolome. Multi-omics approach including microbiome and microbe-associated metabolites may serve as diagnostic biomarkers and enhance treatment prediction in periodontal disease.
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Affiliation(s)
- Hee Sam Na
- Department of Oral Microbiology, School of Dentistry, Pusan National University, Busan, South Korea
- Oral Genomics Research Center, Pusan National University, Busan, South Korea
| | - Suhkmann Kim
- Department of Chemistry, Center for Proteome Biophysics, and Chemistry Institute for Functional Materials, Pusan National University, Busan, South Korea
| | - Seonghye Kim
- Department of Chemistry, Center for Proteome Biophysics, and Chemistry Institute for Functional Materials, Pusan National University, Busan, South Korea
| | - Yeuni Yu
- Interdisplinary Program of Genomic Science, Pusan National University, Busan, South Korea
| | - Si Yeong Kim
- Department of Oral Microbiology, School of Dentistry, Pusan National University, Busan, South Korea
- Oral Genomics Research Center, Pusan National University, Busan, South Korea
| | - Hyun-Joo Kim
- Department of Periodontology, School of Dentistry, Pusan National University, Busan, South Korea
- Dental Research Institute, School of Dentistry, Pusan National University, Busan, South Korea
| | - Ju Youn Lee
- Department of Periodontology, School of Dentistry, Pusan National University, Busan, South Korea
- Dental Research Institute, School of Dentistry, Pusan National University, Busan, South Korea
| | - Jae-Hyung Lee
- Department of Oral Microbiology, School of Dentistry, Kyung Hee University, Seoul, South Korea
- Department of Life and Nanopharmaceutical Sciences, Kyung Hee University, Seoul, South Korea
- Kyung Hee Medical Science Research Institute, Kyung Hee University, Seoul, South Korea
| | - Jin Chung
- Department of Oral Microbiology, School of Dentistry, Pusan National University, Busan, South Korea
- Oral Genomics Research Center, Pusan National University, Busan, South Korea
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Abushahba F, Gürsoy M, Hupa L, Närhi TO. Effect of bioactive glass air-abrasion on Fusobacterium nucleatum and Porphyromonas gingivalis biofilm formed on moderately rough titanium surface. Eur J Oral Sci 2021; 129:e12783. [PMID: 33724569 DOI: 10.1111/eos.12783] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2020] [Revised: 02/11/2021] [Accepted: 02/12/2021] [Indexed: 11/29/2022]
Abstract
This aim of this study was to investigate the effects of three types of air-abrasion particles on dual-species biofilms of Fusobacterium nucleatum and Porphyromonas gingivalis, both of which were cultured on sandblasted and acid-etched (SA) titanium discs. Out of 24 SA discs with biofilm, 18 were exposed to either air-abrasion using Bioglass 45S5 (45S5 BG; n = 6), novel zinc (Zn)-containing bioactive glass (Zn4 BG; n = 6), or inert glass (n = 6). The efficiency of biofilm removal was evaluated using scanning electron microscopy (SEM) imaging and culturing techniques. Air-abrasion using 45S5 BG or Zn4 BG demonstrated a significant decrease in the total number of viable bacteria compared to discs air-abraded with inert glass or intact biofilm without abrasion. Moreover, P. gingivalis could not be detected from SEM images nor culture plates after air-abrasion with 45S5 BG or Zn4 BG. The present study showed that air-abrasion with 45S5 or Zn4 bioactive glasses can successfully eradicate dual-biofilm of F. nucleatum and P. gingivalis from sandblasted and acid-etched titanium discs.
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Affiliation(s)
- Faleh Abushahba
- Department of Prosthetic Dentistry and Stomatognathic Physiology, Institute of Dentistry, University of Turku, Turku, Finland
| | - Mervi Gürsoy
- Department of Periodontology, Institute of Dentistry, University of Turku, Turku, Finland
| | - Leena Hupa
- Johan Gadolin Process Chemistry Centre, Åbo Akademi University, Turku, Finland
| | - Timo O Närhi
- Department of Prosthetic Dentistry and Stomatognathic Physiology, Institute of Dentistry, University of Turku, Turku, Finland.,Welfare Division, City of Turku, Turku, Finland
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Abstract
Oral bacteriophages (or phages), especially periodontal ones, constitute a growing area of interest, but research on oral phages is still in its infancy. Phages are bacterial viruses that may persist as intracellular parasitic deoxyribonucleic acid (DNA) or use bacterial metabolism to replicate and cause bacterial lysis. The microbiomes of saliva, oral mucosa, and dental plaque contain active phage virions, bacterial lysogens (ie, carrying dormant prophages), and bacterial strains containing short fragments of phage DNA. In excess of 2000 oral phages have been confirmed or predicted to infect species of the phyla Actinobacteria (>300 phages), Bacteroidetes (>300 phages), Firmicutes (>1000 phages), Fusobacteria (>200 phages), and Proteobacteria (>700 phages) and three additional phyla (few phages only). This article assesses the current knowledge of the diversity of the oral phage population and the mechanisms by which phages may impact the ecology of oral biofilms. The potential use of phage-based therapy to control major periodontal pathogens is also discussed.
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Affiliation(s)
- Szymon P Szafrański
- Department of Prosthetic Dentistry and Biomedical Materials Science, Hannover Medical School, Hannover, Germany
| | - Jørgen Slots
- Division of Periodontology, Diagnostic Sciences and Dental Hygiene, Ostrow School of Dentistry of USC, University of Southern California, Los Angeles, California, USA
| | - Meike Stiesch
- Department of Prosthetic Dentistry and Biomedical Materials Science, Hannover Medical School, Hannover, Germany
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Engevik MA, Danhof HA, Ruan W, Engevik AC, Chang-Graham AL, Engevik KA, Shi Z, Zhao Y, Brand CK, Krystofiak ES, Venable S, Liu X, Hirschi KD, Hyser JM, Spinler JK, Britton RA, Versalovic J. Fusobacterium nucleatum Secretes Outer Membrane Vesicles and Promotes Intestinal Inflammation. mBio 2021; 12:e02706-20. [PMID: 33653893 PMCID: PMC8092269 DOI: 10.1128/mbio.02706-20] [Citation(s) in RCA: 108] [Impact Index Per Article: 36.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2020] [Accepted: 01/22/2021] [Indexed: 12/17/2022] Open
Abstract
Multiple studies have implicated microbes in the development of inflammation, but the mechanisms remain unknown. Bacteria in the genus Fusobacterium have been identified in the intestinal mucosa of patients with digestive diseases; thus, we hypothesized that Fusobacterium nucleatum promotes intestinal inflammation. The addition of >50 kDa F. nucleatum conditioned media, which contain outer membrane vesicles (OMVs), to colonic epithelial cells stimulated secretion of the proinflammatory cytokines interleukin-8 (IL-8) and tumor necrosis factor (TNF). In addition, purified F. nucleatum OMVs, but not compounds <50 kDa, stimulated IL-8 and TNF production; which was decreased by pharmacological inhibition of Toll-like receptor 4 (TLR4). These effects were linked to downstream effectors p-ERK, p-CREB, and NF-κB. F. nucleatum >50-kDa compounds also stimulated TNF secretion, p-ERK, p-CREB, and NF-κB activation in human colonoid monolayers. In mice harboring a human microbiota, pretreatment with antibiotics and a single oral gavage of F. nucleatum resulted in inflammation. Compared to mice receiving vehicle control, mice treated with F. nucleatum showed disruption of the colonic architecture, with increased immune cell infiltration and depleted mucus layers. Analysis of mucosal gene expression revealed increased levels of proinflammatory cytokines (KC, TNF, IL-6, IFN-γ, and MCP-1) at day 3 and day 5 in F. nucleatum-treated mice compared to controls. These proinflammatory effects were absent in mice who received F. nucleatum without pretreatment with antibiotics, suggesting that an intact microbiome is protective against F. nucleatum-mediated immune responses. These data provide evidence that F. nucleatum promotes proinflammatory signaling cascades in the context of a depleted intestinal microbiome.IMPORTANCE Several studies have identified an increased abundance of Fusobacterium in the intestinal tracts of patients with colon cancer, liver cirrhosis, primary sclerosing cholangitis, gastroesophageal reflux disease, HIV infection, and alcoholism. However, the direct mechanism(s) of action of Fusobacterium on pathophysiological within the gastrointestinal tract is unclear. These studies have identified that F. nucleatum subsp. polymorphum releases outer membrane vesicles which activate TLR4 and NF-κB to stimulate proinflammatory signals in vitro Using mice harboring a human microbiome, we demonstrate that F. nucleatum can promote inflammation, an effect which required antibiotic-mediated alterations in the gut microbiome. Collectively, these results suggest a mechanism by which F. nucleatum may contribute to intestinal inflammation.
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Affiliation(s)
- Melinda A Engevik
- Department of Pathology and Immunology, Baylor College of Medicine, Houston, Texas, USA
- Department of Pathology, Texas Children's Hospital, Houston, Texas, USA
| | - Heather A Danhof
- Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, Texas, USA
| | - Wenly Ruan
- Department of Pediatrics, Baylor College of Medicine, Houston, Texas, USA
| | - Amy C Engevik
- Department of Surgical Sciences, Vanderbilt University Medical Center, Nashville Tennessee, USA
| | - Alexandra L Chang-Graham
- Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, Texas, USA
| | - Kristen A Engevik
- Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, Texas, USA
| | - Zhongcheng Shi
- Department of Pathology and Immunology, Baylor College of Medicine, Houston, Texas, USA
- Department of Pathology, Texas Children's Hospital, Houston, Texas, USA
| | - Yanling Zhao
- Department of Pediatrics, Texas Children's Cancer Center, Texas Children's Hospital, Houston, Texas, USA
| | - Colleen K Brand
- Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, Texas, USA
| | - Evan S Krystofiak
- Department of Cell and Developmental Biology, Vanderbilt University, Nashville, Tennessee, USA
| | - Susan Venable
- Department of Pathology and Immunology, Baylor College of Medicine, Houston, Texas, USA
- Department of Pathology, Texas Children's Hospital, Houston, Texas, USA
| | - Xinli Liu
- Department of Pharmacological and Pharmaceutical Sciences, University of Houston, Houston, Texas, USA
| | - Kendal D Hirschi
- Department of Pediatrics and Human and Molecular Genetics, Children's Nutrition Research Center, Baylor College of Medicine, Houston, Texas, USA
| | - Joseph M Hyser
- Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, Texas, USA
| | - Jennifer K Spinler
- Department of Pathology and Immunology, Baylor College of Medicine, Houston, Texas, USA
- Department of Pathology, Texas Children's Hospital, Houston, Texas, USA
| | - Robert A Britton
- Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, Texas, USA
| | - James Versalovic
- Department of Pathology and Immunology, Baylor College of Medicine, Houston, Texas, USA
- Department of Pathology, Texas Children's Hospital, Houston, Texas, USA
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Paul O, Arora P, Mayer M, Chatterjee S. Inflammation in Periodontal Disease: Possible Link to Vascular Disease. Front Physiol 2021; 11:609614. [PMID: 33519515 PMCID: PMC7841426 DOI: 10.3389/fphys.2020.609614] [Citation(s) in RCA: 48] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2020] [Accepted: 12/21/2020] [Indexed: 12/12/2022] Open
Abstract
Inflammation is a well-organized protective response to pathogens and consists of immune cell recruitment into areas of infection. Inflammation either clears pathogens and gets resolved leading to tissue healing or remains predominantly unresolved triggering pathological processes in organs. Periodontal disease (PD) that is initiated by specific bacteria also triggers production of inflammatory mediators. These processes lead to loss of tissue structure and function. Reactive oxygen species and oxidative stress play a role in susceptibility to periodontal pathogenic bacterial infections. Periodontal inflammation is a risk factor for systemic inflammation and eventually cardiovascular disease (CVD). This review discusses the role of inflammation in PD and its two way association with other health conditions such as diabetes and CVD. Some of the mechanisms underpinning the links between inflammation, diabetes, CVD and PD are also discussed. Finally, we review available epidemiological data and other reports to assess possible links between oral health and CVD.
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Affiliation(s)
- Oindrila Paul
- Institute for Environmental Medicine, Department of Physiology, University of Pennsylvania School of Medicine, Philadelphia, PA, United States
| | - Payal Arora
- Early-Research Oral Care, Colgate-Palmolive Company, Piscataway, NJ, United States
| | - Michael Mayer
- Department of Radiology, University of Pennsylvania School of Medicine, Philadelphia, PA, United States
| | - Shampa Chatterjee
- Institute for Environmental Medicine, Department of Physiology, University of Pennsylvania School of Medicine, Philadelphia, PA, United States
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Kim AR, Lim YK, Kook JK, Bak EJ, Yoo YJ. Lipopolysaccharides of Fusobacterium nucleatum and Porphyromonas gingivalis increase RANKL-expressing neutrophils in air pouches of mice. Lab Anim Res 2021; 37:5. [PMID: 33407938 PMCID: PMC7789191 DOI: 10.1186/s42826-020-00080-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2020] [Accepted: 11/27/2020] [Indexed: 11/10/2022] Open
Abstract
Increases of neutrophils and osteoclasts are pathological changes of periodontitis. RANKL is an osteoclast differentiation factor. The effect of periodontopathogen LPS on RANKL-expressing neutrophils has not been clarified yet. We evaluated numerical changes of RANKL-expressing neutrophils in air pouches of mice injected with LPSs of Fusobacterium nucleatum and Porphyromonas gingivalis. Mice with air pouches were assigned into saline (C)-, E. coli LPS- (Ec LPS)-, F. nucleatum LPS (Fn LPS)-, P. gingivalis LPS (Pg LPS)-, and Fn LPS and Pg LPS (Fn + Pg LPS)-injected groups. CD11b+Ly6G+ neutrophils and CD11b+Ly6G+RANKL+ neutrophils in blood and air pouch exudates were determined by flow cytometry. In blood, compared to the C group, the Fn LPS group showed increases of CD11b+Ly6G+ neutrophils and CD11b+Ly6G+RANKL+ neutrophils whereas the Pg LPS group showed no significant differences. These increases in the Fn LPS group were not different to those in the Ec LPS group. In exudates, Fn LPS and Pg LPS groups showed increases of CD11b+Ly6G+ neutrophils and CD11b+Ly6G+RANKL+ neutrophils compared to the C group. Increased levels in the Fn LPS group were not different to those in the Ec LPS group, but Pg LPS group was lower than those in the Ec LPS group. In blood and exudates, the Fn + Pg LPS group showed no difference in levels of these neutrophils compared to the Ec LPS group. LPSs of F. nucleatum and P. gingivalis increased RANKL-expressing neutrophils although the degrees of increases were different. These suggest that periodontopathogen LPS can act as a stimulant to increase RANKL-expressing neutrophils.
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Affiliation(s)
- Ae Ri Kim
- Department of Oral Biology, College of Dentistry, Yonsei University, Seoul, Republic of Korea
- Department of Applied Life Science, The Graduate School, Yonsei University, Seoul, Republic of Korea
- BK21 PLUS Project, College of Dentistry, Yonsei University, Seoul, Republic of Korea
| | - Yun Kyong Lim
- Korean Collection for Oral Microbiology and Department of Oral Biochemistry, School of Dentistry, Chosun University, Gwangju, Republic of Korea
| | - Joong-Ki Kook
- Korean Collection for Oral Microbiology and Department of Oral Biochemistry, School of Dentistry, Chosun University, Gwangju, Republic of Korea
| | - Eun-Jung Bak
- Department of Oral Biology, College of Dentistry, Yonsei University, Seoul, Republic of Korea.
| | - Yun-Jung Yoo
- Department of Oral Biology, College of Dentistry, Yonsei University, Seoul, Republic of Korea.
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Lu H, Yan X, Zhu B, Zhang L, Feng X, Piao M, Huang B, Wang X, Zhang H, Wang Q, Meng H. The occurrence of peri-implant mucositis associated with the shift of submucosal microbiome in patients with a history of periodontitis during the first two years. J Clin Periodontol 2020; 48:441-454. [PMID: 33617025 DOI: 10.1111/jcpe.13410] [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] [Received: 03/21/2019] [Revised: 10/04/2020] [Accepted: 11/22/2020] [Indexed: 12/16/2022]
Abstract
AIM To investigate the dynamic changes of peri-implant microbiome in patients with a history of periodontitis and to construct a microbial prediction model. MATERIALS AND METHODS The prospective study was performed at one month (T1), one year (T2) and two years (T3) after restoration. Clinical examinations [probing depth (PD), bleeding on probing (BOP), suppuration (SUP)], radiographic examinations and sample collection were conducted at three timepoints. Peri-implant sulcular fluid (PISF) was collected and analysed by 16S rRNA gene sequencing. Generalized linear mixed model (GLMM) was used to identify differences. RESULTS Totally, 168 subjects were assessed for eligibility. Twenty-two patients were recruited in the longitudinal study. Eventually, 67 PISF samples from 24 implants of 12 patients were collected and analysed. Peri-implant microbiome showed increasing diversity and complexity over time. Disease-associated genera Porphyromonas, Tannerella, Treponema and Prevotella dramatically increased from T1 to T3. The prediction model for clinical suppuration at T1 showed a high accuracy of 90%. CONCLUSION The dysbiosis of peri-implant microbiome increased with time during the two-year observation in patients with a history of periodontitis. Genera of Porphyromonas, Tannerella, Treponema and Prevotella were biomarkers of peri-implant mucositis. Microbiota at the early stage could predict subsequent microbial dysbiosis and clinical suppuration.
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Affiliation(s)
- Hongye Lu
- Department of Periodontology, Peking University School and Hospital of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Laboratory for Digital and Material Technology of Stomatology & Beijing Key Laboratory of Digital Stomatology, Beijing, China
| | - Xia Yan
- Department of Periodontology, Peking University School and Hospital of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Laboratory for Digital and Material Technology of Stomatology & Beijing Key Laboratory of Digital Stomatology, Beijing, China
| | - Bin Zhu
- Department of Periodontology, Stomatology Hospital, School of Medicine, Zhejiang University, Hangzhou, China
| | - Li Zhang
- Department of Periodontology, Peking University School and Hospital of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Laboratory for Digital and Material Technology of Stomatology & Beijing Key Laboratory of Digital Stomatology, Beijing, China
| | - Xianghui Feng
- Department of Periodontology, Peking University School and Hospital of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Laboratory for Digital and Material Technology of Stomatology & Beijing Key Laboratory of Digital Stomatology, Beijing, China
| | - Muzi Piao
- Department of Periodontology, Second Dental Center, Peking University School and Hospital of Stomatology, Beijing, China
| | - Baoxin Huang
- Department of Oral Implantology, Guanghua School of Stomatology, Hospital of Stomatology, Guangdong Provincial Key Laboratory of Stomatology, Sun Yat-sen University, Guangzhou, China
| | - Xiane Wang
- Department of Periodontology, Peking University School and Hospital of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Laboratory for Digital and Material Technology of Stomatology & Beijing Key Laboratory of Digital Stomatology, Beijing, China
| | - Haidong Zhang
- Department of Periodontology, Peking University School and Hospital of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Laboratory for Digital and Material Technology of Stomatology & Beijing Key Laboratory of Digital Stomatology, Beijing, China
| | - Qi Wang
- Department of Periodontology, Peking University School and Hospital of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Laboratory for Digital and Material Technology of Stomatology & Beijing Key Laboratory of Digital Stomatology, Beijing, China
| | - Huanxin Meng
- Department of Periodontology, Peking University School and Hospital of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Laboratory for Digital and Material Technology of Stomatology & Beijing Key Laboratory of Digital Stomatology, Beijing, China
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Wuersching SN, Huth KC, Hickel R, Kollmuss M. Inhibitory effect of LL-37 and human lactoferricin on growth and biofilm formation of anaerobes associated with oral diseases. Anaerobe 2020; 67:102301. [PMID: 33249255 DOI: 10.1016/j.anaerobe.2020.102301] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2020] [Revised: 11/20/2020] [Accepted: 11/23/2020] [Indexed: 01/24/2023]
Abstract
This study was conducted to evaluate the antimicrobial potential of the antimicrobial peptides (AMP) LL-37 and human Lactoferricin (LfcinH) on the planktonic growth and biofilm formation of oral pathogenic anaerobes related to caries and periodontitis. Multi-species bacterial suspensions of either facultative anaerobic bacteria (FAB: Streptococcus mutans, Streptococcus sanguinis, Actinomyces naeslundii) or obligate anaerobic bacteria (OAB: Veillonella parvula, Parvimonas micra, Fusobacterium nucleatum) were incubated with different concentrations of AMP solutions for 8 h. Planktonic growth was registered with an ATP-based cell viability assay for FAB and via plate counting for OAB. Biofilms were grown on ZrO2 discs for 4 days in a mixture of the multi-species bacterial suspensions and AMP solutions. Biofilm mass was quantified using a microtiter plate biofilm assay with crystal violet staining. An overall planktonic growth inhibition and biofilm mass reduction of FAB and OAB was registered for LL-37 and LfcinH. Significant inhibitory threshold concentrations of LL-37 were observed in all experiments (p < 0.0001). No significant threshold was observed for LfcinH. Biofilm mass of OAB was barely reduced by LfcinH. The complete mechanisms of the AMPs are not fully understood yet. While LL-37 shows promising features as potential therapeutic for biofilm-associated oral diseases, LfcinH seems unsuitable for this particular indication. For clinical AMP use, further investigations will be necessary.
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Affiliation(s)
- Sabina Noreen Wuersching
- Department of Conservative Dentistry and Periodontology, University Hospital, LMU Munich, Goethestraße 70, 80336, Munich, Germany
| | - Karin Christine Huth
- Department of Conservative Dentistry and Periodontology, University Hospital, LMU Munich, Goethestraße 70, 80336, Munich, Germany
| | - Reinhard Hickel
- Department of Conservative Dentistry and Periodontology, University Hospital, LMU Munich, Goethestraße 70, 80336, Munich, Germany
| | - Maximilian Kollmuss
- Department of Conservative Dentistry and Periodontology, University Hospital, LMU Munich, Goethestraße 70, 80336, Munich, Germany.
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Microbial Composition of Oral Biofilms after Visible Light and Water-Filtered Infrared a Radiation (VIS+wIRA) in Combination with Indocyanine Green (ICG) as Photosensitizer. Antibiotics (Basel) 2020; 9:antibiotics9090532. [PMID: 32842511 PMCID: PMC7558517 DOI: 10.3390/antibiotics9090532] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2020] [Revised: 08/14/2020] [Accepted: 08/18/2020] [Indexed: 12/16/2022] Open
Abstract
In view of increasing antibiotic resistance, antimicrobial photodynamic therapy (aPDT) is an alternative treatment method used to eradicate the microbial community of oral biofilms that can be responsible for different oral infections. In order to investigate changes in the microbial composition after application of aPDT with visible light and water-filtered infrared A (VIS+wIRA) in combination with indocyanine green (ICG), oral microorganisms of the initial and mature biofilm were evaluated by mass spectrometry (MALDI-TOF-MS). To determine surviving microorganisms using MALDI-TOF-MS, an in situ biofilm was irradiated with VIS+wIRA for five minutes in the presence of ICG (300 and 450 µg/mL, respectively). Treatment with chlorhexidine (0.2%) served as positive control. Identified microorganisms of the initial biofilm treated with ICG showed a clear reduction in diversity. The microbial composition of the mature oral biofilm also showed changes after the implementation of aPDT, which mainly resulted in a shift in the percentage of bacterial species. The resulting destruction of the microbial balance within the oral biofilm by aPDT using VIS+wIRA and ICG can be seen as an advantageous supplementary approach in the adjunctive treatment of periodontitis and peri-implantitis.
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Khosravi Y, Kandukuri RDP, Palmer SR, Gloag ES, Borisov SM, Starke EM, Ward MT, Kumar P, de Beer D, Chennu A, Stoodley P. Use of an oxygen planar optode to assess the effect of high velocity microsprays on oxygen penetration in a human dental biofilms in-vitro. BMC Oral Health 2020; 20:230. [PMID: 32825831 PMCID: PMC7441732 DOI: 10.1186/s12903-020-01217-0] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2019] [Accepted: 08/12/2020] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Dental plaque biofilms are the causative agents of caries, gingivitis and periodontitis. Both mechanical and chemical strategies are used in routine oral hygiene strategies to reduce plaque build-up. If allowed to mature biofilms can create anoxic microenvironments leading to communities which harbor pathogenic Gram-negative anaerobes. When subjected to high velocity fluid jets and sprays biofilms can be fluidized which disrupts the biofilm structure and allows the more efficient delivery of antimicrobial agents. METHODS To investigate how such jets may disrupt anoxic niches in the biofilm, we used planar optodes to measure the dissolved oxygen (DO) concentration at the base of in-vitro biofilms grown from human saliva and dental plaque. These biofilms were subject to "shooting" treatments with a commercial high velocity microspray (HVM) device. RESULTS HVM treatment resulted in removal of much of the biofilm and a concurrent rapid shift from anoxic to oxic conditions at the base of the surrounding biofilm. We also assessed the impact of HVM treatment on the microbial community by tracking 7 target species by qPCR. There was a general reduction in copy numbers of the universal 16S RNA by approximately 95%, and changes of individual species in the target region ranged from approximately 1 to 4 log reductions. CONCLUSION We concluded that high velocity microsprays removed a sufficient amount of biofilm to disrupt the anoxic region at the biofilm-surface interface.
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Affiliation(s)
- Yalda Khosravi
- Department of Microbial Infection and Immunity, Ohio State University, Columbus, USA
| | | | - Sara R Palmer
- College of Dentistry, The Ohio State University, Columbus, OH, USA
| | - Erin S Gloag
- Department of Microbial Infection and Immunity, Ohio State University, Columbus, USA
| | - Sergey M Borisov
- Institute of Analytical Chemistry and Food Chemistry Graz University of Technology Stremayrgasse, Graz, Austria
| | | | - Marilyn T Ward
- Philips Oral Healthcare, Bothell, Washington, 98021, USA
| | - Purnima Kumar
- College of Dentistry, The Ohio State University, Columbus, OH, USA
| | - Dirk de Beer
- Max Planck Institute for Marine Microbiology, Bremen, Germany
| | - Arjun Chennu
- Max Planck Institute for Marine Microbiology, Bremen, Germany
| | - Paul Stoodley
- Department of Microbial Infection and Immunity, Ohio State University, Columbus, USA. .,Department Orthopaedics, Ohio State University, Columbus, USA. .,National Centre for Advanced Tribology (nCATS), Mechanical Engineering, University of Southampton, Southampton, UK.
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Abstract
The last decade has witnessed unparalleled advances in our understanding of the complexity of the oral microbiome and the compositional changes that occur in subgingival biofilms in the transition from health to gingivitis and to destructive periodontal disease. The traditional view, which has held sway for the last 2 decades, that disease is characterized by the outgrowth of a consortium, or consortia, of a limited number of potentially pathogenic organisms, has given way to an alternative paradigm. In this new view, the microbiological changes associated with disease represent whole-scale alterations to the overall microbial population structure and to the functional properties of the entire community. Thus, and in common with other microbially mediated diseases of the gastrointestinal tract, the normally balanced, symbiotic, and generally benign commensal microbiome of the tooth-associated biofilm undergoes dysbiosis to a potentially deleterious microbiota. Coincident with progress in defining the microbiology of these diseases, there have been equally important advances in our understanding of the inflammatory systems of the periodontal tissues, their control, and how inflammation may contribute both to the development of dysbiosis and, in a deregulated state, the destructive disease process. One can therefore speculate that the inflammatory response and the periodontal microbiome are in a bidirectional balance in oral health and a bidirectional imbalance in periodontitis. However, despite these clear insights into both sides of the host/microbe balance in periodontal disease, there remain several unresolved issues concerning the role of the microbiota in disease. These include, but are not limited to, the factors which determine progression from gingivitis to periodontitis in a proportion of the population, whether dysbiosis causes disease or results from disease, and the molecular details of the microbial stimulus responsible for driving the destructive inflammatory response. Further progress in resolving these issues may provide significant benefit to diagnosis, treatment, and prevention.
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Affiliation(s)
- Mike A Curtis
- Centre for Host Microbiome Interactions, Faculty of Dentistry, Oral& Craniofacial Sciences, King's College London, London, UK
| | - Patricia I Diaz
- School of Dental Medicine, UConn Health, Farmington, Connecticut, USA
| | - Thomas E Van Dyke
- Department of Applied Oral Sciences, The Forsyth Institute, Cambridge, Massachusetts, USA
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Na HS, Kim SY, Han H, Kim HJ, Lee JY, Lee JH, Chung J. Identification of Potential Oral Microbial Biomarkers for the Diagnosis of Periodontitis. J Clin Med 2020; 9:E1549. [PMID: 32443919 PMCID: PMC7290295 DOI: 10.3390/jcm9051549] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2020] [Revised: 05/15/2020] [Accepted: 05/18/2020] [Indexed: 02/06/2023] Open
Abstract
Periodontitis is a chronic and multifactorial inflammatory disease that can lead to tooth loss. At present, the diagnosis for periodontitis is primarily based on clinical examination and radiographic parameters. Detecting the periodontal pathogens at the subgingival plaque requires skilled professionals to collect samples. Periodontal pathogens are also detected on various mucous membranes in patients with periodontitis. In this study, we characterized the oral microbiome profiles from buccal mucosa and supragingival space in a total of 272 healthy subjects as a control group, and periodontitis patients as a disease group. We identified 13 phyla, 193 genera, and 527 species and determined periodontitis-associated taxa. Porphyromonas gingivalis, Tannerella forsythia, Treponema denticolar, Filifactor alocis, Porphyromonas endodontalis, Fretibacterium fastiosum and Peptostreptococcus species were significantly increased in both the buccal mucosa and the supragingival space in periodontitis patients. The identified eight periodontitis-associated bacterial species were clinically validated in an independent cohort. We generated the prediction model based on the oral microbiome profiles using five machine learning algorithms, and validated its capability in predicting the status of patients with periodontitis. The results showed that the oral microbiome profiles from buccal mucosa and supragingival space can represent the microbial composition of subgingival plaque and further be utilized to identify potential microbial biomarkers for the diagnosis of periodontitis. Besides, bacterial community interaction network analysis found distinct patterns associated with dysbiosis in periodontitis. In summary, we have identified oral bacterial species from buccal and supragingival sites which can predict subgingival bacterial composition and can be used for early diagnosis of periodontitis. Therefore, our study provides an important basis for developing easy and noninvasive methods to diagnose and monitor periodontitis.
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Affiliation(s)
- Hee Sam Na
- Department of Oral Microbiology, School of Dentistry, Pusan National University, Busandaehak-ro 49, Mulgeum-eup, Yangsan-si, Gyeongsangnam-do 50612, Korea; (H.S.N.); (S.Y.K.); (H.H.)
- Oral Genomics Research Center, School of Dentistry, Pusan National University, Busandaehak-ro 49, Mulgeum-eup, Yangsan-si, Gyeongsangnam-do 50612, Korea
| | - Si Yeong Kim
- Department of Oral Microbiology, School of Dentistry, Pusan National University, Busandaehak-ro 49, Mulgeum-eup, Yangsan-si, Gyeongsangnam-do 50612, Korea; (H.S.N.); (S.Y.K.); (H.H.)
- Oral Genomics Research Center, School of Dentistry, Pusan National University, Busandaehak-ro 49, Mulgeum-eup, Yangsan-si, Gyeongsangnam-do 50612, Korea
| | - Hyejung Han
- Department of Oral Microbiology, School of Dentistry, Pusan National University, Busandaehak-ro 49, Mulgeum-eup, Yangsan-si, Gyeongsangnam-do 50612, Korea; (H.S.N.); (S.Y.K.); (H.H.)
- Oral Genomics Research Center, School of Dentistry, Pusan National University, Busandaehak-ro 49, Mulgeum-eup, Yangsan-si, Gyeongsangnam-do 50612, Korea
| | - Hyun-Joo Kim
- Department of Periodontology, Dental and Life Science Institute, School of Dentistry, Pusan National University, Busandaehak-ro 49, Mulgeum-eup, Yangsan-si, Gyeongsangnam-do 50612, Korea; (H.-J.K.); (J.-Y.L.)
- Department of Periodontology and Dental Research Institute, School of Dentistry, Pusan National University, Busandaehak-ro 49, Mulgeum-eup, Yangsan-si, Gyeongsangnam-do 50612, Korea
| | - Ju-Youn Lee
- Department of Periodontology, Dental and Life Science Institute, School of Dentistry, Pusan National University, Busandaehak-ro 49, Mulgeum-eup, Yangsan-si, Gyeongsangnam-do 50612, Korea; (H.-J.K.); (J.-Y.L.)
- Department of Periodontology and Dental Research Institute, School of Dentistry, Pusan National University, Busandaehak-ro 49, Mulgeum-eup, Yangsan-si, Gyeongsangnam-do 50612, Korea
| | - Jae-Hyung Lee
- Department of Oral Microbiology, School of Dentistry, Kyung Hee University, 26 Kyungheedae-ro, Dongdaemun-gu, Seoul 02447, Korea
- Department of Life and Nanopharmaceutical Sciences, Kyung Hee University, 26 Kyungheedae-ro, Dongdaemun-gu, Seoul 02447, Korea
| | - Jin Chung
- Department of Oral Microbiology, School of Dentistry, Pusan National University, Busandaehak-ro 49, Mulgeum-eup, Yangsan-si, Gyeongsangnam-do 50612, Korea; (H.S.N.); (S.Y.K.); (H.H.)
- Oral Genomics Research Center, School of Dentistry, Pusan National University, Busandaehak-ro 49, Mulgeum-eup, Yangsan-si, Gyeongsangnam-do 50612, Korea
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Thymoquinone inhibits biofilm formation and virulence properties of periodontal bacteria. Arch Oral Biol 2020; 115:104744. [PMID: 32416351 DOI: 10.1016/j.archoralbio.2020.104744] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2020] [Revised: 03/27/2020] [Accepted: 04/30/2020] [Indexed: 01/05/2023]
Abstract
OBJECTIVES To evaluate the effects of thymoquinone (TQ) on biofilm formation, hemolysis, hydrogen sulfide (H2S) production and expression of virulence factors of Fusobacterium nucleatum and Porphyromonas gingivalis. MATERIALS AND METHODS Reference strains of F. nucleatum ATCC 25586 and P. gingivalis A7436 were tested in our study. The minimum inhibitory concentration (MIC) of TQ was determined by broth microdilution method. The impacts of TQ on virulence properties of the periodontal bacteria including biofilm formation, hemolysis and H2S activities were studied. Quantitative RT-PCR was performed to evaluate the expression levels of key virulence factors including outer membrane proteins (aim-1, fadA) in F. nucleatum as well as cysteine proteinases or gingipains (rgpA, rgpB, kgp) and fimbriae (fimA, mfa1) in P. gingivalis. RESULTS The MIC of TQ were 12.5 and 1.56 μg/mL in F. nucleatum and P. gingivalis, respectively. The sub-MIC concentrations of TQ could prevent biofilm formation and hemolysis activities of both bacteria. TQ also inhibited H2S production which is highly associated with oral malodour. Scanning electron microscopy revealed that TQ could disrupt bacterial membrane and led to cell lysis. Furthermore, TQ reduced the expression of major virulence factors tested in F. nucleatum and P. gingivalis. CONCLUSIONS The TQ had potent antibacterial effect and could attenuate virulence properties of F. nucleatum and P. gingivalis. Therefore, TQ has the potential to be developed and used in periodontal treatments, especially to prevent the progression of periodontitis.
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de Oliveira RVD, Bonafé FSS, Spolidorio DMP, Koga-Ito CY, de Farias AL, Kirker KR, James GA, Brighenti FL. Streptococcus mutans and Actinomyces naeslundii Interaction in Dual-Species Biofilm. Microorganisms 2020; 8:microorganisms8020194. [PMID: 32023892 PMCID: PMC7074783 DOI: 10.3390/microorganisms8020194] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2019] [Revised: 01/17/2020] [Accepted: 01/24/2020] [Indexed: 12/12/2022] Open
Abstract
The study of bacterial interaction between Streptococcus mutans and Actinomyces naeslundii may disclose important features of biofilm interspecies relationships. The aim of this study was to characterize-with an emphasis on biofilm formation and composition and metabolic activity-single- and dual-species biofilms of S. mutans or A. naeslundii, and to use a drip flow reactor (DFR) to evaluate biofilm stress responses to 0.2% chlorhexidine diacetate (CHX). Single- and dual-species biofilms were grown for 24 h. The following factors were evaluated: cell viability, biomass and total proteins in the extracellular matrix, 2,3-bis(2-methoxy-4-nitro-5-sulfophenyl)-2H-tetrazolium-5-carboxanilide-"XTT"-reduction and lactic acid production. To evaluate stress response, biofilms were grown in DFR. Biofilms were treated with CHX or 0.9% sodium chloride (NaCl; control). Biofilms were plated for viability assessment. Confocal laser-scanning microscopy (CLSM) was also performed. Data analysis was carried out at 5% significance level. S. mutans viability and lactic acid production in dual-species biofilms were significantly reduced. S. mutans showed a higher resistance to CHX in dual-species biofilms. Total protein content, biomass and XTT reduction showed no significant differences between single- and dual-species biofilms. CLSM images showed the formation of large clusters in dual-species biofilms. In conclusion, dual-species biofilms reduced S. mutans viability and lactic acid production and increased S. mutans' resistance to chlorhexidine.
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Affiliation(s)
- Rosa Virginia Dutra de Oliveira
- School of Dentistry, São Paulo State University (UNESP), Araraquara, SP 14801-385, Brazil; (R.V.D.d.O.); (F.S.S.B.); (D.M.P.S.); (A.L.d.F.)
| | - Fernanda Salloume Sampaio Bonafé
- School of Dentistry, São Paulo State University (UNESP), Araraquara, SP 14801-385, Brazil; (R.V.D.d.O.); (F.S.S.B.); (D.M.P.S.); (A.L.d.F.)
| | | | - Cristiane Yumi Koga-Ito
- São José dos Campos Institute of Science and Technology, São Paulo State University (UNESP), São José dos Campos, SP 12245-000, Brazil;
| | - Aline Leite de Farias
- School of Dentistry, São Paulo State University (UNESP), Araraquara, SP 14801-385, Brazil; (R.V.D.d.O.); (F.S.S.B.); (D.M.P.S.); (A.L.d.F.)
| | - Kelly R. Kirker
- Centre for Biofilm Engineering, Montana State University, Bozeman, MT 59717, USA; (K.R.K.); (G.A.J.)
| | - Garth A. James
- Centre for Biofilm Engineering, Montana State University, Bozeman, MT 59717, USA; (K.R.K.); (G.A.J.)
| | - Fernanda Lourenção Brighenti
- School of Dentistry, São Paulo State University (UNESP), Araraquara, SP 14801-385, Brazil; (R.V.D.d.O.); (F.S.S.B.); (D.M.P.S.); (A.L.d.F.)
- Correspondence: ; Tel.: +55-16-3301-6551
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Brennan CA, Garrett WS. Fusobacterium nucleatum - symbiont, opportunist and oncobacterium. Nat Rev Microbiol 2020; 17:156-166. [PMID: 30546113 DOI: 10.1038/s41579-018-0129-6] [Citation(s) in RCA: 580] [Impact Index Per Article: 145.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Fusobacterium nucleatum has long been found to cause opportunistic infections and has recently been implicated in colorectal cancer; however, it is a common member of the oral microbiota and can have a symbiotic relationship with its hosts. To address this dissonance, we explore the diversity and niches of fusobacteria and reconsider historic fusobacterial taxonomy in the context of current technology. We also undertake a critical reappraisal of fusobacteria with a focus on F. nucleatum as a mutualist, infectious agent and oncogenic microorganism. In this Review, we delve into recent insights and future directions for fusobacterial research, including the current genetic toolkit, our evolving understanding of its mechanistic role in promoting colorectal cancer and the challenges of developing diagnostics and therapeutics for F. nucleatum.
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Affiliation(s)
| | - Wendy S Garrett
- Harvard T. H. Chan School of Public Health, Boston, MA, USA.
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47
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Diaz P, Valm A. Microbial Interactions in Oral Communities Mediate Emergent Biofilm Properties. J Dent Res 2020; 99:18-25. [PMID: 31590609 PMCID: PMC6927214 DOI: 10.1177/0022034519880157] [Citation(s) in RCA: 53] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
Oral microbial communities are extraordinarily complex in taxonomic composition and comprise interdependent biological systems. The bacteria, archaea, fungi, and viruses that thrive within these communities engage in extensive cell-cell interactions, which are both beneficial and antagonistic. Direct physical interactions among individual cells mediate large-scale architectural biofilm arrangements and provide spatial proximity for chemical communication and metabolic cooperation. In this review, we summarize recent work in identifying specific molecular components that mediate cell-cell interactions and describe metabolic interactions, such as cross-feeding and exchange of electron acceptors and small molecules, that modify the growth and virulence of individual species. We argue, however, that although pairwise interaction models have provided useful information, complex community-like systems are needed to study the properties of oral communities. The networks of multiple synergistic and antagonistic interactions within oral biofilms give rise to the emergent properties of persistence, stability, and long-range spatial structure, with these properties mediating the dysbiotic transitions from health to oral diseases. A better understanding of the fundamental properties of interspecies networks will lead to the development of effective strategies to manipulate oral communities.
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Affiliation(s)
- P.I. Diaz
- Division of Periodontology, Department of Oral Health and Diagnostic Sciences, School of Dental Medicine, UConn Health, Farmington, CT, USA
| | - A.M. Valm
- Department of Biological Sciences, University at Albany, SUNY, Albany, NY, USA,A.M. Valm, Department of Biological Sciences, University at Albany, SUNY, 1400 Washington Ave., Albany, NY 12222, USA.
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48
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Liu G, Chen F, Cai Y, Chen Z, Luan Q, Yu X. Measuring the subgingival microbiota in periodontitis patients: Comparison of the surface layer and the underlying layers. Microbiol Immunol 2019; 64:99-112. [PMID: 31793046 DOI: 10.1111/1348-0421.12759] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2019] [Revised: 10/21/2019] [Accepted: 11/09/2019] [Indexed: 12/15/2022]
Abstract
Periodontitis is a major cause of tooth loss in adults that initially results from dental plaque. Subgingival plaque pathogenesis is affected by both community composition and plaque structures, although limited data are available concerning the latter. To bridge this knowledge gap, subgingival plaques were obtained using filter paper (the fourth layer) and curette (the first-third layers) sequentially and the phylogenetic differences between the first-third layers and the fourth layer were characterized by sequencing the V3-V4 regions of 16S rRNA. A total of 11 phyla, 148 genera, and 308 species were obtained by bioinformatic analysis, and no significant differences between the operational taxonomic unit numbers were observed for these groups. In both groups, the most abundant species were Porphyromonas gingivalis and Fusobacterium nucleatum. Actinomyces naeslundii, Streptococcus intermedius, and Prevotella intermedia possessed relatively high proportions in the first-third layers; while in the fourth layer, both traditional pathogens (Treponema denticola and Campylobacter rectus) and novel pathobionts (Eubacterium saphenum, Filifactor alocis, Treponema sp. HOT238) were prominent. Network analysis showed that either of them exhibited a scale-free property and was constructed by two negatively correlated components (the pathogen component and the nonpathogen component), while the synergy in the nonpathogen component was lower in the first-third layers than that in the fourth layer. After merging these two parts into a whole plaque group, the negative/positive correlation ratio increased. With potential connections, the first-third layers and the fourth layer showed characteristic key nodes in bacterial networks.
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Affiliation(s)
- Guojing Liu
- Department of Periodontology, Peking University School and Hospital of Stomatology, Beijing, China
| | - Feng Chen
- Central Laboratory, Peking University School and Hospital of Stomatology, Beijing, China
| | - Yu Cai
- Department of Periodontology, Peking University School and Hospital of Stomatology, Beijing, China
| | - Zhibin Chen
- Department of Periodontology, Peking University School and Hospital of Stomatology, Beijing, China
| | - Qingxian Luan
- Department of Periodontology, Peking University School and Hospital of Stomatology, Beijing, China
| | - Xiaoqian Yu
- Department of Periodontology, Peking University School and Hospital of Stomatology, Beijing, China
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Lima BP, Hu LI, Vreeman GW, Weibel DB, Lux R. The Oral Bacterium Fusobacterium nucleatum Binds Staphylococcus aureus and Alters Expression of the Staphylococcal Accessory Regulator sarA. MICROBIAL ECOLOGY 2019; 78:336-347. [PMID: 30474730 DOI: 10.1007/s00248-018-1291-0] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/31/2018] [Accepted: 11/07/2018] [Indexed: 06/09/2023]
Abstract
Staphylococcus aureus, an opportunistic pathogen member of the nasal and skin microbiota, can also be found in human oral samples and has been linked to infectious diseases of the oral cavity. As the nasal and oral cavities are anatomically connected, it is currently unclear whether S. aureus can colonize the oral cavity and become part of the oral microbiota, or if its presence in the oral cavity is simply transient. To start addressing this question, we assessed S. aureus ability to directly bind selected members of the oral microbiota as well as its ability to integrate into a human-derived complex oral microbial community in vitro. Our data show that S. aureus forms aggregates with Fusobacterium nucleatum and Porphyromonas gingivalis and that it can incorporate into the human-derived in vitro oral community. Further analysis of the F. nucleatum-S. aureus interaction revealed that the outer-membrane adhesin RadD is partially involved in aggregate formation and that the RadD-mediated interaction leads to an increase in expression of the staphylococcal global regulator gene sarA. Our findings lend support to the notion that S. aureus can become part of the complex microbiota of the human mouth, which could serve as a reservoir for S. aureus. Furthermore, direct interaction with key members of the oral microbiota could affect S. aureus pathogenicity contributing to the development of several S. aureus associated oral infections.
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Affiliation(s)
- Bruno P Lima
- Division of Constitutive and Regenerative Sciences, School of Dentistry, University of California, Los Angeles, CA, USA
- Department of Diagnostic and Biological Sciences, School of Dentistry, Universit of Minnesota, Minneapolis, MN, USA
| | - Linda I Hu
- Department of Biochemistry, University of Wisconsin-Madison, 440 Henry Mall, Madison, WI, USA
- Department of Microbiology-Immunology, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA
| | - Gerrit W Vreeman
- Department of Diagnostic and Biological Sciences, School of Dentistry, Universit of Minnesota, Minneapolis, MN, USA
| | - Douglas B Weibel
- Department of Biochemistry, University of Wisconsin-Madison, 440 Henry Mall, Madison, WI, USA
- Department of Chemistry, University of Wisconsin-Madison, 440 Henry Mall, Madison, WI, USA
- Department of Biomedical Engineering, University of Wisconsin-Madison, 440 Henry Mall, Madison, WI, USA
| | - Renate Lux
- Division of Constitutive and Regenerative Sciences, School of Dentistry, University of California, Los Angeles, CA, USA.
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Cleaver LM, Moazzez R, Carpenter GH. Mixed aerobic-anaerobic incubation conditions induce proteolytic activity from in vitro salivary biofilms. J Oral Microbiol 2019; 11:1643206. [PMID: 31489124 PMCID: PMC6711154 DOI: 10.1080/20002297.2019.1643206] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2019] [Revised: 06/27/2019] [Accepted: 07/03/2019] [Indexed: 11/26/2022] Open
Abstract
Oral biofilms have not been studied using both metabolome and protein profiling concurrently. Bacteria produce proteases that lead to degradation of functional salivary proteins. The novel protocol described here allows for complete characterisation of in vitro oral biofilms, including proteolytic, metabolic, and microbiome analysis. Biofilms were grown on hydroxyapatite discs from whole mouth saliva, using sterilised saliva as a growth-medium, in different growth environments. Salivary protein degradation was assessed from spent saliva growth-medium using SDS-polyacrylamide gel electrophoresis (SDS-PAGE), and metabolic activity by nuclear magnetic resonance (NMR). Discs were assessed for depth and coverage of biofilms by confocal laser scanning microscopy (CLSM), and biofilms were collected at the end of the experiment for 16S rRNA gene sequence analysis. There was a significant difference in biofilm viability, salivary protein degradation, and metabolites identified between biofilms grown aerobically and biofilms exposed to an anaerobic environment. Bacterial 16S rRNA gene sequencing showed the predominant genus in the 7-day aerobic biofilms was Streptococcus, in aerobic-anaerobic and anaerobic 7-day biofilms Porphyromonas, and in aerobic-anaerobic and anaerobic 13-day biofilms Fusobacterium. This data suggests new growth requirements and capabilities for analysing salivary biofilms in vitro, which can be used to benefit future research into oral bacterial biofilms.
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Affiliation(s)
- Leanne M Cleaver
- Centre for Host Microbiome Interactions, King's College London Faculty of Dentistry, Oral and Craniofacial Sciences, London, UK
| | - Rebecca Moazzez
- Centre for Oral, Clinical and Translational Science, King's College London Faculty of Dentistry, Oral and Craniofacial Sciences, London, UK
| | - Guy H Carpenter
- Centre for Host Microbiome Interactions, King's College London Faculty of Dentistry, Oral and Craniofacial Sciences, London, UK
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