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Hartmann A, Binder T, Rothballer M. Quorum sensing-related activities of beneficial and pathogenic bacteria have important implications for plant and human health. FEMS Microbiol Ecol 2024; 100:fiae076. [PMID: 38744663 PMCID: PMC11149725 DOI: 10.1093/femsec/fiae076] [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: 01/23/2024] [Revised: 03/28/2024] [Accepted: 05/13/2024] [Indexed: 05/16/2024] Open
Abstract
Eukaryotic organisms coevolved with microbes from the environment forming holobiotic meta-genomic units. Members of host-associated microbiomes have commensalic, beneficial/symbiotic, or pathogenic phenotypes. More than 100 years ago, Lorenz Hiltner, pioneer of soil microbiology, introduced the term 'Rhizosphere' to characterize the observation that a high density of saprophytic, beneficial, and pathogenic microbes are attracted by root exudates. The balance between these types of microbes decide about the health of the host. Nowadays we know, that for the interaction of microbes with all eukaryotic hosts similar principles and processes of cooperative and competitive functions are in action. Small diffusible molecules like (phyto)hormones, volatiles and quorum sensing signals are examples for mediators of interspecies and cross-kingdom interactions. Quorum sensing of bacteria is mediated by different autoinducible metabolites in a density-dependent manner. In this perspective publication, the role of QS-related activities for the health of hosts will be discussed focussing mostly on N-acyl-homoserine lactones (AHL). It is also considered that in some cases very close phylogenetic relations exist between plant beneficial and opportunistic human pathogenic bacteria. Based on a genome and system-targeted new understanding, sociomicrobiological solutions are possible for the biocontrol of diseases and the health improvement of eukaryotic hosts.
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Affiliation(s)
- Anton Hartmann
- Faculty of Biology, Microbe-Host Interactions, Ludwig-Maximilian-University Munich, Grosshaderner Str. 2, D-82152 Planegg/Martinsried, Germany
- Department of Environmental Sciences, Helmholtz Zentrum Munich, German Research Center for Health and Environment, Research Unit Microbe-Plant Interactions, Ingolstädter Landstr. 1, D-85762 Neuherberg, Germany
| | - Tatiana Binder
- Department of Environmental Sciences, Helmholtz Zentrum Munich, German Research Center for Health and Environment, Research Unit Microbe-Plant Interactions, Ingolstädter Landstr. 1, D-85762 Neuherberg, Germany
| | - Michael Rothballer
- Department of Environmental Sciences, Helmholtz Zentrum Munich, German Research Center for Health and Environment, Research Unit Microbe-Plant Interactions, Ingolstädter Landstr. 1, D-85762 Neuherberg, Germany
- Helmholtz Zentrum Munich, German Research Center for Health and Environment, Institute of Network Biology, Ingolstädter Landstr. 1 D-85762 Neuherberg, Germany
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Gonzales M, Jacquet P, Gaucher F, Chabrière É, Plener L, Daudé D. AHL-Based Quorum Sensing Regulates the Biosynthesis of a Variety of Bioactive Molecules in Bacteria. JOURNAL OF NATURAL PRODUCTS 2024; 87:1268-1284. [PMID: 38390739 DOI: 10.1021/acs.jnatprod.3c00672] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/24/2024]
Abstract
Bacteria are social microorganisms that use communication systems known as quorum sensing (QS) to regulate diverse cellular behaviors including the production of various secreted molecules. Bacterial secondary metabolites are widely studied for their bioactivities including antibiotic, antifungal, antiparasitic, and cytotoxic compounds. Besides playing a crucial role in natural bacterial niches and intermicrobial competition by targeting neighboring organisms and conferring survival advantages to the producer, these bioactive molecules may be of prime interest to develop new antimicrobials or anticancer therapies. This review focuses on bioactive compounds produced under acyl homoserine lactone-based QS regulation by Gram-negative bacteria that are pathogenic to humans and animals, including the Burkholderia, Serratia, Pseudomonas, Chromobacterium, and Pseudoalteromonas genera. The synthesis, regulation, chemical nature, biocidal effects, and potential applications of these identified toxic molecules are presented and discussed in light of their role in microbial interactions.
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Affiliation(s)
- Mélanie Gonzales
- Aix Marseille Université, IRD, APHM, MEPHI, IHU-Méditerranée Infection, Marseille 13288, France
- Gene&GreenTK, Marseille 13005, France
| | | | | | - Éric Chabrière
- Aix Marseille Université, IRD, APHM, MEPHI, IHU-Méditerranée Infection, Marseille 13288, France
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Sikdar R, Beauclaire MV, Lima BP, Herzberg MC, Elias MH. N-acyl homoserine lactone signaling modulates bacterial community associated with human dental plaque. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2024.03.15.585217. [PMID: 38559107 PMCID: PMC10980036 DOI: 10.1101/2024.03.15.585217] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/04/2024]
Abstract
N-acyl homoserine lactones (AHLs) are small diffusible signaling molecules that mediate a cell density-dependent bacterial communication system known as quorum sensing (QS). AHL-mediated QS regulates gene expression to control many critical bacterial behaviors including biofilm formation, pathogenicity, and antimicrobial resistance. Dental plaque is a complex multispecies oral biofilm formed by successive colonization of the tooth surface by groups of commensal, symbiotic, and pathogenic bacteria, which can contribute to tooth decay and periodontal diseases. While the existence and roles of AHL-mediated QS in oral microbiota have been debated, recent evidence indicates that AHLs play significant roles in oral biofilm development and community dysbiosis. The underlying mechanisms, however, remain poorly characterized. To better understand the importance of AHL signaling in dental plaque formation, we manipulated AHL signaling by adding AHL lactonases or exogenous AHL signaling molecules. We find that AHLs can be detected in dental plaque grown under 5% CO2 conditions, but not when grown under anaerobic conditions, and yet anaerobic cultures are still responsive to AHLs. QS signal disruption using lactonases leads to changes in microbial population structures in both planktonic and biofilm states, changes that are dependent on the substrate preference of the used lactonase but mainly result in the increase in the abundance of commensal and pioneer colonizer species. Remarkably, the opposite manipulation, that is the addition of exogenous AHLs increases the abundance of late colonizer bacterial species. Hence, this work highlights the importance of AHL-mediated QS in dental plaque communities, its potential different roles in anaerobic and aerobic parts of dental plaque, and underscores the potential of QS interference in the control of periodontal diseases.
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Affiliation(s)
- Rakesh Sikdar
- Biotechnology Institute, University of Minnesota, Saint Paul, MN 55108, USA
| | - Mai V. Beauclaire
- Department of Biochemistry, Molecular Biology and Biophysics, University of Minnesota, Saint Paul, MN 55108, USA
| | - Bruno P. Lima
- Department of Diagnostic and Biological Sciences, School of Dentistry, University of Minnesota, Minneapolis, MN 55455, USA
| | - Mark C. Herzberg
- Department of Diagnostic and Biological Sciences, School of Dentistry, University of Minnesota, Minneapolis, MN 55455, USA
| | - Mikael H. Elias
- Biotechnology Institute, University of Minnesota, Saint Paul, MN 55108, USA
- Department of Biochemistry, Molecular Biology and Biophysics, University of Minnesota, Saint Paul, MN 55108, USA
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Parga A, Balboa S, Otero-Casal P, Otero A. New Preventive Strategy against Oral Biofilm Formation in Caries-Active Children: An In Vitro Study. Antibiotics (Basel) 2023; 12:1263. [PMID: 37627682 PMCID: PMC10451667 DOI: 10.3390/antibiotics12081263] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2023] [Revised: 07/27/2023] [Accepted: 07/28/2023] [Indexed: 08/27/2023] Open
Abstract
Quorum quenching (QQ) is the inhibition of bacterial communication, i.e., quorum sensing (QS). QS is a key mechanism in regulating biofilm formation and phenotype in complex bacterial communities, such as those found within cariogenic biofilms. Whereas QQ approaches were shown to effectively reduce biomass, knowledge of their impact on the taxonomic composition of oral polymicrobial biofilms remains scarce. Here, we investigate the effect of the QQ lactonase Aii20J on biomass production and taxonomical composition of biofilms. We collected supragingival plaque samples from 10 caries-free and 10 caries-active children and cultured them to generate in vitro biofilms. We describe significant biomass reductions upon Aii20J exposure, as assessed by crystal violet assays. Taxonomical profiling using 16S rRNA gene amplicon sequencing revealed no significant changes in bacterial composition at the genus level. Interestingly, at the species level Aii20J-treatment increased the abundance of Streptococcus cristatus and Streptococcus salivarius. Both S. cristatus and S. salivarius express pH-buffering enzymes (arginine deiminase and urease, respectively) that catalyze ammonia production, thereby potentially raising local pH and counteracting the biofilm's cariogenic potential. Within the limitations of the study, our findings provide evidence of the biofilm-modulating ability of QQ and offer novel insights into alternative strategies to restore homeostasis within dysbiotic ecosystems.
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Affiliation(s)
- Ana Parga
- Department of Microbiology and Parasitology, CIBUS-Faculty of Biology, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Spain;
| | - Sabela Balboa
- Department of Microbiology and Parasitology, Center of Cross-Disciplinary Research in Environmental Technologies (CRETUS), Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Spain
| | - Paz Otero-Casal
- Department of Surgery and Medical-Surgical Specialties, Faculty of Medicine and Odontology, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Spain
- Unit of Oral Health, Centro de Saúde Santa Comba-Negreira, SERGAS, 15841 Santa Comba, Spain
| | - Ana Otero
- Department of Microbiology and Parasitology, CIBUS-Faculty of Biology, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Spain;
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Parga A, Muras A, Otero-Casal P, Arredondo A, Soler-Ollé A, Àlvarez G, Alcaraz LD, Mira A, Blanc V, Otero A. The quorum quenching enzyme Aii20J modifies in vitro periodontal biofilm formation. Front Cell Infect Microbiol 2023; 13:1118630. [PMID: 36816581 PMCID: PMC9932050 DOI: 10.3389/fcimb.2023.1118630] [Citation(s) in RCA: 14] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2022] [Accepted: 01/20/2023] [Indexed: 02/05/2023] Open
Abstract
Introduction Recent studies have revealed the presence of N-acyl-homoserine lactones (AHLs) quorum sensing (QS) signals in the oral environment. Yet, their role in oral biofilm development remains scarcely investigated. The use of quorum quenching (QQ) strategies targeting AHLs has been described as efficient for the control of pathogenic biofilms. Here, we evaluate the use of a highly active AHL-targeting QQ enzyme, Aii20J, to modulate oral biofilm formation in vitro. Methods The effect of the QQ enzyme was studied in in vitro multispecies biofilms generated from oral samples taken from healthy donors and patients with periodontal disease. Subgingival samples were used as inocula, aiming to select members of the microbiota of the periodontal pocket niche in the in vitro biofilms. Biofilm formation abilities and microbial composition were studied upon treating the biofilms with the QQ enzyme Aii20J. Results and Discussion The addition of the enzyme resulted in significant biofilm mass reductions in 30 - 60% of the subgingival-derived biofilms, although standard AHLs could not be found in the supernatants of the cultured biofilms. Changes in biofilm mass were not accompanied by significant alterations of bacterial relative abundance at the genus level. The investigation of 125 oral supragingival metagenomes and a synthetic subgingival metagenome revealed a surprisingly high abundance and broad distribution of homologous of the AHL synthase HdtS and several protein families of AHL receptors, as well as an enormous presence of QQ enzymes, pointing to the existence of an intricate signaling network in oral biofilms that has been so far unreported, and should be further investigated. Together, our findings support the use of Aii20J to modulate polymicrobial biofilm formation without changing the microbiome structure of the biofilm. Results in this study suggest that AHLs or AHL-like molecules affect oral biofilm formation, encouraging the application of QQ strategies for oral health improvement, and reinforcing the importance of personalized approaches to oral biofilm control.
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Affiliation(s)
- Ana Parga
- Department of Microbiology and Parasitology, CIBUS-Faculty of Biology, Universidade de Santiago de Compostela, Santiago de Compostela, Spain
| | - Andrea Muras
- Department of Microbiology and Parasitology, CIBUS-Faculty of Biology, Universidade de Santiago de Compostela, Santiago de Compostela, Spain
| | - Paz Otero-Casal
- Department of Surgery and Medical-Surgical Specialties, Faculty of Medicine and Odontology, Universidade de Santiago de Compostela, Santiago de Compostela, Spain
- Unit of Oral Health, Santa Comba-Negreira, (CS) SERGAS, Santiago de Compostela, Spain
| | - Alexandre Arredondo
- Department of Microbiology, Dentaid Research Center, Cerdanyola Del Vallès, Spain
| | - Agnès Soler-Ollé
- Department of Microbiology, Dentaid Research Center, Cerdanyola Del Vallès, Spain
| | - Gerard Àlvarez
- Department of Microbiology, Dentaid Research Center, Cerdanyola Del Vallès, Spain
| | - Luis D. Alcaraz
- Department of Cellular Biology, Faculty of Sciences, National Autonomous University of Mexico, Coyoacán, Mexico
| | - Alex Mira
- Department of Genomics and Health, FISABIO Foundation, Valencia, Spain
| | - Vanessa Blanc
- Department of Microbiology, Dentaid Research Center, Cerdanyola Del Vallès, Spain
| | - Ana Otero
- Department of Microbiology and Parasitology, CIBUS-Faculty of Biology, Universidade de Santiago de Compostela, Santiago de Compostela, Spain
- *Correspondence: Ana Otero,
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In Vitro Analysis of Organic Ester Functional Groups in Carious Dentine. APPLIED SCIENCES-BASEL 2022. [DOI: 10.3390/app12031088] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/10/2022]
Abstract
Background: With the implementation of minimally invasive selective caries removal protocols to treat cavitated, deep carious dentine lesions, there is a need to investigate specific biochemical moiety distributions to help characterise and distinguish between infected (contaminated) and affected (demineralised) zones within the dentine lesion. The present in vitro investigation aimed to compare the distribution of ester functional groups (1740 cm−1) within carious dentine tissue (infected and affected dentine). The null hypothesis stipulated that there are no differences in ester function intensity/distribution within carious dentine lesions. Materials and Methods: From a total of five extracted human molar teeth with carious dentine lesions, 246 points from 10 sections of carious dentine were examined using high-resolution Raman spectroscopy and characterised into infected, affected and sound dentine. The peak intensity of the characteristic vibration mode of the ester function was calculated from sample scans. Results: Analyses indicated a statistically significant difference in the spectroscopic vibration bands of esters between the infected and affected dentine zones. Conclusion: The ester functional group is higher in intensity in the caries-infected dentine zone compared to the affected tissue. This finding could be used to develop an objective indicator for the selective operative management of carious dentine.
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Muras A, Mallo N, Otero-Casal P, Pose-Rodríguez JM, Otero A. Quorum sensing systems as a new target to prevent biofilm-related oral diseases. Oral Dis 2020; 28:307-313. [PMID: 33080080 DOI: 10.1111/odi.13689] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2020] [Revised: 09/23/2020] [Accepted: 10/11/2020] [Indexed: 12/13/2022]
Abstract
OBJECTIVE The present study summarizes the current knowledge on the role of bacterial extracellular signaling systems, known as quorum sensing (QS), in oral biofilm formation, and on the possibility of blocking these microbial communication systems as a potential approach to prevent and treat oral infectious diseases. METHODS A detailed literature review of the current knowledge of QS in the oral cavity was performed, using the databases MEDLINE (through PubMed) and Web of Science. RESULTS Accumulating direct and indirect evidence indicates an important role of QS molecules in the oral microbial ecosystem. CONCLUSIONS The mechanisms regulating gene expression through bacterial communication systems constitute a promising target to control oral biofilm formation. Although cell-to-cell communication is pivotal for biofilm formation of many pathogenic bacteria, knowledge concerning microbial interactions and signaling processes within multispecies biofilms in the oral cavity is still limited.
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Affiliation(s)
- Andrea Muras
- Department of Microbiology and Parasitology, Faculty of Biology-CIBUS, Universidade de Santiago de Compostela, Santiago de Compostela, Spain
| | - Natalia Mallo
- Department of Microbiology and Parasitology, Faculty of Biology-CIBUS, Universidade de Santiago de Compostela, Santiago de Compostela, Spain
| | - Paz Otero-Casal
- Department of Surgery and Medical-Surgical Specialty, Faculty of Medicine and Dentistry, Universidade de Santiago de Compostela, Santiago de Compostela, Spain.,Unit of Oral Health, C.S. Santa Comba-Negreira, SERGAS, Santa Comba, Spain
| | - José M Pose-Rodríguez
- Department of Surgery and Medical-Surgical Specialty, Faculty of Medicine and Dentistry, Universidade de Santiago de Compostela, Santiago de Compostela, Spain
| | - Ana Otero
- Department of Microbiology and Parasitology, Faculty of Biology-CIBUS, Universidade de Santiago de Compostela, Santiago de Compostela, Spain
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Muras A, Otero-Casal P, Blanc V, Otero A. Acyl homoserine lactone-mediated quorum sensing in the oral cavity: a paradigm revisited. Sci Rep 2020; 10:9800. [PMID: 32555242 PMCID: PMC7300016 DOI: 10.1038/s41598-020-66704-4] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2020] [Accepted: 05/27/2020] [Indexed: 01/08/2023] Open
Abstract
Acyl homoserine lactones (AHLs), the quorum sensing (QS) signals produced by Gram-negative bacteria, are currently considered to play a minor role in the development of oral biofilm since their production by oral pathogens has not been ascertained thus far. However, we report the presence of AHLs in different oral samples and their production by the oral pathogen Porphyromonas gingivalis. The importance of AHLs is further supported by a very high prevalence of AHL-degradation capability, up to 60%, among bacteria isolated from dental plaque and saliva samples. Furthermore, the wide-spectrum AHL-lactonase Aii20J significantly inhibited oral biofilm formation in different in vitro biofilm models and caused important changes in bacterial composition. Besides, the inhibitory effect of Aii20J on a mixed biofilm of 6 oral pathogens was verified using confocal microscopy. Much more research is needed in order to be able to associate specific AHLs with oral pathologies and to individuate the key actors in AHL-mediated QS processes in dental plaque formation. However, these results indicate a higher relevance of the AHLs in the oral cavity than generally accepted thus far and suggest the potential use of inhibitory strategies against these signals for the prevention and treatment of oral diseases.
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Affiliation(s)
- Andrea Muras
- Departamento de Microbioloxía e Parasitoloxía, Facultade de Bioloxía-CIBUS, Universidade de Santiago de Compostela, Santiago de Compostela, Spain
| | - Paz Otero-Casal
- Departamento de Ciruxía e Especialidade Médico-Cirúrxica, Facultade de Medicina e Odontoloxía, Universidade de Santiago de Compostela, Santiago de Compostela, Spain
- Unit of Oral Health, C.S. Santa Comba-Negreira, SERGAS, Spain
| | - Vanessa Blanc
- Department of Microbiology, Dentaid Research Center, Dentaid S.L., Barcelona, Spain
| | - Ana Otero
- Departamento de Microbioloxía e Parasitoloxía, Facultade de Bioloxía-CIBUS, Universidade de Santiago de Compostela, Santiago de Compostela, Spain.
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Short-Chain N-Acylhomoserine Lactone Quorum-Sensing Molecules Promote Periodontal Pathogens in In Vitro Oral Biofilms. Appl Environ Microbiol 2020; 86:AEM.01941-19. [PMID: 31757829 DOI: 10.1128/aem.01941-19] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2019] [Accepted: 11/11/2019] [Indexed: 12/14/2022] Open
Abstract
Acylhomoserine lactones (AHLs), the quorum-sensing (QS) signals produced by a range of Gram-negative bacteria, are involved in biofilm formation in many pathogenic and environmental bacteria. Nevertheless, the current paradigm excludes a role of AHLs in dental plaque formation, while other QS signals, such as AI-2 and autoinducer peptides, have been demonstrated to play an important role in biofilm formation and virulence-related gene expression in oral pathogens. In the present work, we have explored the effect of externally added AHLs on in vitro oral biofilm models for commensal, cariogenic, and periodontal dental plaque. While little effect on bacterial growth was observed, some AHLs specifically affected the lactic acid production and protease activity of the biofilms. Most importantly, the analysis of bacterial diversity in the biofilms showed that the addition of C6-homoserine lactone (C6-HSL) results in a shift toward a periodontal bacterial composition profile by increasing the relative presence of the orange-complex bacteria Peptostreptococcus and Prevotella These results point to a relevant role of AHL-mediated QS in dental plaque formation and might be involved in the development of dysbiosis, the mechanism of which should be further investigated. This finding potentially opens new opportunities for the prevention or treatment of the periodontal disease.IMPORTANCE Dental plaque is omnipresent in healthy oral cavities and part of our commensal microbial colonization. At the same time, dental plaque is the cause of the most common human diseases, caries and gum disease. Dental plaque consists of billions of microbes attached to the surface of your teeth. Communication among these microbes is pivotal for development of these complex communities yet poorly studied in dental plaque. In the present study, we show that a specific communication molecule induces changes within the community related to the development of gum disease. This finding suggests that interfering with microbial communication may represent an interesting novel strategy to prevent gum disease that should be further investigated.
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Sun F, Ahmed A, Wang L, Dong M, Niu W. Comparison of oral microbiota in orthodontic patients and healthy individuals. Microb Pathog 2018; 123:473-477. [PMID: 30096429 DOI: 10.1016/j.micpath.2018.08.011] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2017] [Revised: 08/06/2018] [Accepted: 08/07/2018] [Indexed: 11/30/2022]
Abstract
Orthodontic treatments often include dental displacement using a fixed retainer such as braces, which may result in the accumulation of plaque that provides a suitable environment for microorganisms to cause oral infection. So, this study was designed to investigate the microbial diversity among orthodontic patients and healthy individuals. METHODS Fifty individuals i.e. 30 orthodontic patients and 20 normal individuals were included in this study. Samples were collected during the midterm of orthodontic treatment (10-12 months). Saliva samples were collected and total DNA was isolated. Polymerase chain reaction denaturing gradient gel electrophoresis (PCR-DGGE) with universal primers targeting the V3 region of 16s rRNA was used to study the bacterial diversity among different orthodontic and control groups. After DGGE profile analysis, the predominant product bands from the gel were excised, cloned, and sequenced to confirm the taxonomic identity followed by its quantification by using real-time PCR with gene-specific primers. RESULTS Both orthodontic treatment and control groups formed two distinct clustering profiles, but the Shannon-Weaver index (H') indicated greater microbial diversity in the orthodontic group (P = 0.08). Sequence analysis and real-time PCR revealed a greater number of Pseudomonas spp. in the orthodontic group, while there was no significant difference in Streptococcal spp. CONCLUSION This study suggested alterations in the oral microbiota following orthodontic treatment would provide diagnostic tools to identify prevalent microbes associated with oral infections that may prove useful for developing future therapies.
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Affiliation(s)
- Fubo Sun
- College of Medical Laboratory, Dalian Medical University, Dalian, China
| | - Ayaz Ahmed
- Dr. Panjwani Center for Molecular Medicine and Drug Research, International Center for Chemical and Biological Sciences, University of Karachi, Karachi, Pakistan
| | - Lina Wang
- Department of Endodontics and Periodontics, College of Stomatology, Dalian Medical University, Dalian, China
| | - Ming Dong
- Department of Endodontics and Periodontics, College of Stomatology, Zhongshan College of Dalian Medical University, China
| | - Weidong Niu
- Department of Endodontics and Periodontics, College of Stomatology, Dalian Medical University, Dalian, China.
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Saurav K, Burgsdorf I, Teta R, Esposito G, Bar-Shalom R, Costantino V, Steindler L. Isolation of MarineParacoccussp. Ss63 from the SpongeSarcotragussp. and Characterization of its Quorum-Sensing Chemical-Signaling Molecules by LC-MS/MS Analysis. Isr J Chem 2016. [DOI: 10.1002/ijch.201600003] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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