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Chen L, Han M, Xu J, Cao Z, Chen W, Jing B, Peng G, Wang Y, Liao X, Wu Y, Wen X. Firmicutes primarily drive odor emission profiles in poultry manure treatments. Poult Sci 2024; 103:104250. [PMID: 39226740 PMCID: PMC11403488 DOI: 10.1016/j.psj.2024.104250] [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: 06/12/2024] [Revised: 08/17/2024] [Accepted: 08/19/2024] [Indexed: 09/05/2024] Open
Abstract
Odor emission during livestock manure treatment poses a threat to the environment and human health. However, the odor emission profiles and related factors of commonly employed poultry manure treatments have rarely been studied. Here, we explored the odor emission profiles of 3 common poultry manure treatments in China, namely, ectopic fermentation beds (EFB), annular composting troughs (ACT) and air-drying rooms (ADR). The results revealed that the total odor concentrations in the EFB, ACT and ADR groups were 2407.67 ± 512.94, 13444.00 ± 1269.92 and 621.33 ± 59.27, respectively. The ACT had the greatest number of odorants (31), followed by the ADR (27) and the EFB (24). Methyl mercaptan, acetic acid, acetaldehyde, hydrogen sulfide, ammonia and acrolein were the key odorous compounds detected in all the treatments. ACT contained the greatest number of key odorants (11) and exhibited an extensive co-occurrence relationship with the bacterial community. The 3 poultry manure treatments exhibited significant differences in the beta diversities of the bacterial community. The phylum of most bacteria associated with key odorants was Firmicutes, and Enterococcus and Oceanobacillus were significantly positively correlated with methyl mercaptan. The bacterial functional groups were enriched in carbohydrate metabolism, amino acid metabolism and energy metabolism, and the functional genes shaped the odor emission patterns in the poultry manure treatments. Redundancy analysis demonstrated that odor emission in the 3 treatments was positively correlated with Firmicutes abundance, pH, electrical conductivity and moisture. Thus, our study provides a good understanding of odor emission profiles in poultry manure treatments and data for precise odor emission control during livestock production.
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Affiliation(s)
- Longhai Chen
- Guangdong Laboratory for Lingnan Modern Agriculture, College of Animal Science, South China Agricultural University, Guangzhou 510642, China
| | - Meng Han
- State Environmental Protection Key Laboratory of Odor Pollution Control, Tianjin Academy of Eco-environmental Sciences, Tianjin 300191, China
| | - Jiaojiao Xu
- Guangdong Laboratory for Lingnan Modern Agriculture, College of Animal Science, South China Agricultural University, Guangzhou 510642, China
| | - Zhen Cao
- Production Technology Department, Wen's Foodstuff Group Co., Ltd., Yunfu 527400, China
| | - Wenjun Chen
- Guangdong Laboratory for Lingnan Modern Agriculture, College of Animal Science, South China Agricultural University, Guangzhou 510642, China
| | - Boyu Jing
- State Environmental Protection Key Laboratory of Odor Pollution Control, Tianjin Academy of Eco-environmental Sciences, Tianjin 300191, China
| | - Guoliang Peng
- Guangdong Provincial Key Laboratory of Utilization and Conservation of Food and Medicinal Resources in Northern Region, Shaoguan University, Shaoguan 512005, China
| | - Yan Wang
- Guangdong Laboratory for Lingnan Modern Agriculture, College of Animal Science, South China Agricultural University, Guangzhou 510642, China; State Key Laboratory of Swine and Poultry Breeding Industry, College of Animal Science, South China Agricultural University, Guangzhou 510642, China; Guangdong Provincial Key Lab of Agro-Animal Genomics and Molecular Breeding, and Key Lab of Chicken Genetics, Breeding and Reproduction, Ministry of Agriculture and Rural Affair, South China Agricultural University, Guangzhou 510642, China
| | - Xindi Liao
- Guangdong Laboratory for Lingnan Modern Agriculture, College of Animal Science, South China Agricultural University, Guangzhou 510642, China; State Key Laboratory of Swine and Poultry Breeding Industry, College of Animal Science, South China Agricultural University, Guangzhou 510642, China; Guangdong Provincial Key Lab of Agro-Animal Genomics and Molecular Breeding, and Key Lab of Chicken Genetics, Breeding and Reproduction, Ministry of Agriculture and Rural Affair, South China Agricultural University, Guangzhou 510642, China
| | - Yinbao Wu
- Guangdong Laboratory for Lingnan Modern Agriculture, College of Animal Science, South China Agricultural University, Guangzhou 510642, China; State Key Laboratory of Swine and Poultry Breeding Industry, College of Animal Science, South China Agricultural University, Guangzhou 510642, China; Guangdong Provincial Key Lab of Agro-Animal Genomics and Molecular Breeding, and Key Lab of Chicken Genetics, Breeding and Reproduction, Ministry of Agriculture and Rural Affair, South China Agricultural University, Guangzhou 510642, China
| | - Xin Wen
- Guangdong Laboratory for Lingnan Modern Agriculture, College of Animal Science, South China Agricultural University, Guangzhou 510642, China; Guangdong Provincial Key Laboratory of Utilization and Conservation of Food and Medicinal Resources in Northern Region, Shaoguan University, Shaoguan 512005, China.
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Santos AJDC, Dias RS, Silva JD, Sousa MDP, Clarindo WR, Silva CCD, de Paula SO. Two marine sulfur-reducing bacteria co-culture is essential for productive infection by a T4-like Escherichia coli-infecting phage. Heliyon 2024; 10:e37934. [PMID: 39328515 PMCID: PMC11425119 DOI: 10.1016/j.heliyon.2024.e37934] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2024] [Revised: 09/05/2024] [Accepted: 09/13/2024] [Indexed: 09/28/2024] Open
Abstract
The control of microbiologically influenced corrosion (MIC) challenges the oil exploration sector. The MIC results from electrochemical reactions facilitated by microorganisms such as sulfate-reducing bacteria (SRB), which adhere to the surface of the ducts forming biofilms. SRB uses sulfate as the final electron acceptor, resulting in hydrogen sulfide as the final product, a highly reactive corrosive, and toxic compound. Due to the high diversity of the SRB group, this study evaluated the effect of an Escherichia coli phage, with biofilm degrading enzymes, in preventing biofilm formation by microbial consortium P48SEP and reducing H2S production in a complex SRB community. Three phage concentrations were evaluated (104, 108 and 1012 UFP/ml). High and medium phage concentrations prevented biofilm development, as evidenced by scanning electron microscopy, chemical analysis, and cell counts. In addition, the virus altered the expression pattern of some bacterial genes and the relative abundance of proteins related to biofilm formation and cell stress response. Using a complex culture formed mainly by SRB, it was possible to observe the bacterial growth, H2S, and metabolic activity reduction after the phage was added. This study shows for the first time the ability of an E. coli-infecting phage to prevent the biofilm formation of an SRB consortium and infect and replicate at high concentrations on the non-specific host. This new finding turns the use of non-specific phages a promising alternative for the control of biocorrosion in oil and gas installations, on the other side, alert to the use of large concentration of phages and the influence on bacterial groups with geological importance, opening a research field in phage biology.
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Affiliation(s)
- Adriele Jéssica do Carmo Santos
- Department of Microbiology, Federal University of Viçosa, Avenue Peter Henry Rolfs, s/n, Viçosa, Minas Gerais, 36570-900, Brazil
| | - Roberto Sousa Dias
- Department of General Biology, Federal University of Viçosa, Avenue Peter Henry Rolfs, s/n, Viçosa, Minas Gerais, 36570-900, Brazil
| | - Jéssica Duarte Silva
- Department of Microbiology, Federal University of Viçosa, Avenue Peter Henry Rolfs, s/n, Viçosa, Minas Gerais, 36570-900, Brazil
| | - Maíra de Paula Sousa
- Leopoldo Américo Miguez de Mello Research and Development Center, Petrobras, Av. Horácio Macedo, 950, Federal University of Rio de Janeiro, Rio de Janeiro, 21941-915, Brazil
| | - Wellington Ronildo Clarindo
- Department of General Biology, Federal University of Viçosa, Avenue Peter Henry Rolfs, s/n, Viçosa, Minas Gerais, 36570-900, Brazil
| | - Cynthia Canêdo da Silva
- Department of Microbiology, Federal University of Viçosa, Avenue Peter Henry Rolfs, s/n, Viçosa, Minas Gerais, 36570-900, Brazil
| | - Sérgio Oliveira de Paula
- Department of General Biology, Federal University of Viçosa, Avenue Peter Henry Rolfs, s/n, Viçosa, Minas Gerais, 36570-900, Brazil
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Rajasekaran JJ, Krishnamurthy HK, Bosco J, Jayaraman V, Krishna K, Wang T, Bei K. Oral Microbiome: A Review of Its Impact on Oral and Systemic Health. Microorganisms 2024; 12:1797. [PMID: 39338471 PMCID: PMC11434369 DOI: 10.3390/microorganisms12091797] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2024] [Revised: 08/07/2024] [Accepted: 08/16/2024] [Indexed: 09/30/2024] Open
Abstract
PURPOSE OF REVIEW This review investigates the oral microbiome's composition, functions, influencing factors, connections to oral and systemic diseases, and personalized oral care strategies. RECENT FINDINGS The oral microbiome is a complex ecosystem consisting of bacteria, fungi, archaea, and viruses that contribute to oral health. Various factors, such as diet, smoking, alcohol consumption, lifestyle choices, and medical conditions, can affect the balance of the oral microbiome and lead to dysbiosis, which can result in oral health issues like dental caries, gingivitis, periodontitis, oral candidiasis, and halitosis. Importantly, our review explores novel associations between the oral microbiome and systemic diseases including gastrointestinal, cardiovascular, endocrinal, and neurological conditions, autoimmune diseases, and cancer. We comprehensively review the efficacy of interventions like dental probiotics, xylitol, oral rinses, fluoride, essential oils, oil pulling, and peptides in promoting oral health by modulating the oral microbiome. SUMMARY This review emphasizes the critical functions of the oral microbiota in dental and overall health, providing insights into the effects of microbial imbalances on various diseases. It underlines the significant connection between the oral microbiota and general health. Furthermore, it explores the advantages of probiotics and other dental care ingredients in promoting oral health and addressing common oral issues, offering a comprehensive strategy for personalized oral care.
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Affiliation(s)
- John J. Rajasekaran
- Vibrant Sciences LLC, Santa Clara, CA 95054, USA; (H.K.K.); (V.J.); (K.K.); (T.W.); (K.B.)
| | | | - Jophi Bosco
- Vibrant America LLC, Santa Clara, CA 95054, USA;
| | - Vasanth Jayaraman
- Vibrant Sciences LLC, Santa Clara, CA 95054, USA; (H.K.K.); (V.J.); (K.K.); (T.W.); (K.B.)
| | - Karthik Krishna
- Vibrant Sciences LLC, Santa Clara, CA 95054, USA; (H.K.K.); (V.J.); (K.K.); (T.W.); (K.B.)
| | - Tianhao Wang
- Vibrant Sciences LLC, Santa Clara, CA 95054, USA; (H.K.K.); (V.J.); (K.K.); (T.W.); (K.B.)
| | - Kang Bei
- Vibrant Sciences LLC, Santa Clara, CA 95054, USA; (H.K.K.); (V.J.); (K.K.); (T.W.); (K.B.)
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Dong X, Zhao W, Ma S, Li X, Li G, Zhang S. Oral microbial profiles of extrinsic black tooth stain in primary dentition: A literature review. J Dent Sci 2024; 19:1369-1379. [PMID: 39035270 PMCID: PMC11259676 DOI: 10.1016/j.jds.2024.02.028] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2024] [Revised: 02/28/2024] [Indexed: 07/23/2024] Open
Abstract
The extrinsic black tooth stain (EBS) is commonly found in primary dentition. Patients cannot clean the EBS; this can only be done by professional scaling and debridement. It also has a tendency to reform, which significantly compromises children's aesthetics and even affects their quality of life. However, there is no conclusive evidence on the etiology of the EBS. The associations between the EBS and related oral microbial features is one of the research hot topics. No literature review summarized these research progresses in this area. Therefore, we reviewed the literature on the microbiology of the EBS since 1931 and reported as the following 5 aspects: molecular biotechnology, morphological structure and physiochemical characteristics, microbial etiology hypothesis and core microbial characteristics. The EBS is a special dental plaque mainly composed of Gram-positive bacilli and cocci with scattered calcium deposits that acquired salivary pellicle activates. Early studies showed that the Actinomyces was the main pathogenic bacteria. With advances in biological research techniques, the 'core microbiome' was proposed. The potential pathogenic genera were Actinomyces, Prevotella nigrescens, Pseudotropinibacterium, Leptotrichia, Neisseria and Rothia. However, the pathogenic species of the above genera were still unclear. Currently, it is believed that the EBS consists of iron compounds or black substances that oral bacterial metabolism produces or that the bacterial metabolites formed after chemical reactions in the micro-ecological environment.
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Affiliation(s)
- Xue Dong
- Department of Preventive Dentistry, Kunming Medical University, School and Hospital of Stomatology, Kunming, China
| | - Weijin Zhao
- Department of Preventive Dentistry, Kunming Medical University, School and Hospital of Stomatology, Kunming, China
| | - Sha Ma
- Department of Preventive Dentistry, Kunming Medical University, School and Hospital of Stomatology, Kunming, China
| | - Ximeng Li
- Department of Preventive Dentistry, Kunming Medical University, School and Hospital of Stomatology, Kunming, China
| | - Guiding Li
- Yunnan Key Laboratory of Stomatology, Kunming Medical University, Kunming, China
| | - Shinan Zhang
- Department of Preventive Dentistry, Kunming Medical University, School and Hospital of Stomatology, Kunming, China
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de Barros Motta P, Gonçalves MLL, Gallo JMAS, Sobral APT, Motta LJ, Santos EM, de Andrade DJC, Duran CCG, Fernandes KPS, Mesquita-Ferrari RA, Horliana ACRT, Bussadori SK. Evaluation of the Oral Microbiome before and after Treatments for Halitosis with Photodynamic Therapy and Probiotics-Pilot Study. Healthcare (Basel) 2024; 12:1123. [PMID: 38891198 PMCID: PMC11172044 DOI: 10.3390/healthcare12111123] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2024] [Revised: 03/08/2024] [Accepted: 05/29/2024] [Indexed: 06/21/2024] Open
Abstract
BACKGROUND To compare photodynamic therapy and the use of probiotics in reducing halitosis assessed through gas chromatography and microbiome analysis. METHODS Participants aged from 18 to 25 years showing sulfide (SH2) ≥ 112 ppb on gas chromatography were selected. They were divided into four treatment groups: Group 1-Tongue Scraping; Group 2-Antimicrobial Photodynamic Therapy (aPDT); Group 3-Probiotics; and Group 4-Antimicrobial Photodynamic Therapy (aPDT) and Probiotics. The halimetry process was performed before, immediately after the treatments, and 7 days, 14 days, and 30 days after the initial collection. The collections for later microbiological analysis were made along with the halimetry for microbiome analysis. RESULTS Treatment with aPDT or probiotics under these experimental conditions was not able to change the bacteria present in the biofilm of the tongue. CONCLUSIONS More research is needed to know the behavior of the oral microbiome in the presence of halitosis and the effectiveness of new treatments.
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Affiliation(s)
- Pamella de Barros Motta
- Post Graduation Program in Biophotonics Applied to Health Sciences, Universidade Nove de Julho (UNINOVE), São Paulo 01525-000, SP, Brazil; (P.d.B.M.); (L.J.M.); (C.C.G.D.); (K.P.S.F.); (R.A.M.-F.); (A.C.R.T.H.)
| | - Marcela Leticia Leal Gonçalves
- Post Graduation Program in Biophotonics Applied to Health Sciences, Universidade Nove de Julho (UNINOVE), São Paulo 01525-000, SP, Brazil; (P.d.B.M.); (L.J.M.); (C.C.G.D.); (K.P.S.F.); (R.A.M.-F.); (A.C.R.T.H.)
- Post Graduation Program in Health and Environment, Universidade Metropolitana de Santos (UNIMES), Santos 11045-002, SP, Brazil; (M.L.L.G.); (A.P.T.S.); (E.M.S.)
| | | | - Ana Paula Taboada Sobral
- Post Graduation Program in Biophotonics Applied to Health Sciences, Universidade Nove de Julho (UNINOVE), São Paulo 01525-000, SP, Brazil; (P.d.B.M.); (L.J.M.); (C.C.G.D.); (K.P.S.F.); (R.A.M.-F.); (A.C.R.T.H.)
- Post Graduation Program in Health and Environment, Universidade Metropolitana de Santos (UNIMES), Santos 11045-002, SP, Brazil; (M.L.L.G.); (A.P.T.S.); (E.M.S.)
| | - Lara Jansiski Motta
- Post Graduation Program in Biophotonics Applied to Health Sciences, Universidade Nove de Julho (UNINOVE), São Paulo 01525-000, SP, Brazil; (P.d.B.M.); (L.J.M.); (C.C.G.D.); (K.P.S.F.); (R.A.M.-F.); (A.C.R.T.H.)
| | - Elaine Marcílio Santos
- Post Graduation Program in Health and Environment, Universidade Metropolitana de Santos (UNIMES), Santos 11045-002, SP, Brazil; (M.L.L.G.); (A.P.T.S.); (E.M.S.)
| | | | - Cinthya Cosme Gutierrez Duran
- Post Graduation Program in Biophotonics Applied to Health Sciences, Universidade Nove de Julho (UNINOVE), São Paulo 01525-000, SP, Brazil; (P.d.B.M.); (L.J.M.); (C.C.G.D.); (K.P.S.F.); (R.A.M.-F.); (A.C.R.T.H.)
| | - Kristianne Porta Santos Fernandes
- Post Graduation Program in Biophotonics Applied to Health Sciences, Universidade Nove de Julho (UNINOVE), São Paulo 01525-000, SP, Brazil; (P.d.B.M.); (L.J.M.); (C.C.G.D.); (K.P.S.F.); (R.A.M.-F.); (A.C.R.T.H.)
| | - Raquel Agnelli Mesquita-Ferrari
- Post Graduation Program in Biophotonics Applied to Health Sciences, Universidade Nove de Julho (UNINOVE), São Paulo 01525-000, SP, Brazil; (P.d.B.M.); (L.J.M.); (C.C.G.D.); (K.P.S.F.); (R.A.M.-F.); (A.C.R.T.H.)
| | - Anna Carolina Ratto Tempestini Horliana
- Post Graduation Program in Biophotonics Applied to Health Sciences, Universidade Nove de Julho (UNINOVE), São Paulo 01525-000, SP, Brazil; (P.d.B.M.); (L.J.M.); (C.C.G.D.); (K.P.S.F.); (R.A.M.-F.); (A.C.R.T.H.)
| | - Sandra Kalil Bussadori
- Post Graduation Program in Biophotonics Applied to Health Sciences, Universidade Nove de Julho (UNINOVE), São Paulo 01525-000, SP, Brazil; (P.d.B.M.); (L.J.M.); (C.C.G.D.); (K.P.S.F.); (R.A.M.-F.); (A.C.R.T.H.)
- Dentistry College, Universidade Metropolitana de Santos (UNIMES), Santos 11045-002, SP, Brazil
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Wang M, Chu W. Dencichine attenuates the virulence of Fusobacterium nucleatum by targeting hydrogen sulfide-producing enzyme. Int Microbiol 2024:10.1007/s10123-024-00539-1. [PMID: 38789725 DOI: 10.1007/s10123-024-00539-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2023] [Revised: 12/31/2023] [Accepted: 05/19/2024] [Indexed: 05/26/2024]
Abstract
Oral opportunistic pathogen Fusobacterium nucleatum can participate in various disease processes through the metabolite hydrogen sulfide, such as halitosis and colorectal cancer. The object of this study is to identify inhibitor capable of suppressing Fn1220, which is the principal hydrogen sulfide-producing enzyme in F. nucleatum. Through this inhibition, we aim to reduce the hydrogen sulfide production of F. nucleatum, consequently diminishing its virulence. Employing molecular docking techniques for inhibitor screening, we identified dencichine as the monomeric compound from Chinese medicine exhibiting the lowest binding energy to Fn1220 among a set of 27,045 candidates, and evaluated in vitro the ability of dencichine to inhibit hydrogen sulfide production using bismuth chloride method. Additionally, we investigated its impact on key virulence factors, including biofilm formation, hemolysis, and adhesion factors of F. nucleatum, using the crystalline violet method, sheep blood method, and RT-qPCR, respectively. Furthermore, we assessed the influence of dencichine on the lifespan of Caenorhabditis elegans. Results showed that dencichine was a suitable inhibitor of the Fn1220 of F. nucleatum, which significantly inhibited the production of virulence factors, e.g., biofilm, hemolysin, FadA, and Fap2 of F. nucleatum and improved the survival of C. elegans. We successfully identified the inhibitor of the enzyme Fn1220, dencichine, which inhibited the production of hydrogen sulfide and attenuated the virulence of F. nucleatum and holds promise as a potential therapeutic avenue for addressing oral diseases, e.g., halitosis in the future.
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Affiliation(s)
- Minyu Wang
- Department of Pharmaceutical Microbiology, School of Life Science and Technology, China Pharmaceutical University, Nanjing, 210009, China
| | - Weihua Chu
- Department of Pharmaceutical Microbiology, School of Life Science and Technology, China Pharmaceutical University, Nanjing, 210009, China.
- State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing, 210009, China.
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Zhao J, Gao Z. Dynamic changes in microbial communities and flavor during different fermentation stages of proso millet Baijiu, a new product from Shanxi light-flavored Baijiu. Front Microbiol 2024; 15:1333466. [PMID: 38318340 PMCID: PMC10839113 DOI: 10.3389/fmicb.2024.1333466] [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: 11/05/2023] [Accepted: 01/09/2024] [Indexed: 02/07/2024] Open
Abstract
Introduction Proso millet, a high-quality fermentation material used for Chinese yellow wine production, can produce special flavored substances; however, its role in improving the flavor and altering microbial communities of light-flavored Baijiu during fermentation remain unknown. Thus, we aimed to investigate the effect of proso millet on improving the flavor of light-flavored Baijiu and altering microbial communities during different fermentation stages. Methods The dynamic changes in the microbial communities and flavor of proso millet (50%) + sorghum (50%) mixed fermentation samples were analyzed through intermittent sampling on days 7, 14, 21, and 28 of the fermentation process. Microbial high-throughput sequencing and the analysis of flavor characteristics were conducted through 16S DNA/ ITS amplicon sequencing and gas chromatography (multi-capillary column)-ion mobility spectrometry, respectively. Results Proso millet significantly changed the core flavor compound composition of traditional light-flavored Baijiu from ethyl acetate, ethyl hexanoate, ethyl hexanoate dimer, ethyl butanoate, ethyl lactate, and butyl acetate to oct-2-ene, 2-butanol, propyl propanoate, 2-pentenal, and 4-methylpentanal. The amplicon sequencing analysis revealed that the alpha diversity parameters of bacterial and fungal communities, including the Chao1, Pielou_e, Shannon, and Simpson indices, for proso millet-sorghum mixed fermentation samples were significantly higher than those for sorghum fermentation samples (p < 0.05). Of the 40 most significant microbial genera in two treatments, proso millet significantly increased the abundance of 12 bacterial and 18 fungal genera. Among the 40 most significant bacterial and fungal species, 23 bacterial species belonged to the Lactobacillus genus, whereas the 30 primary fungal species belonged to 28 different genera. The analysis of the relationship between microbial changes and the main flavor compounds of light-flavored Baijiu showed that bacteria from the Weissella, Acinetobacter, Bacteroides, Psychrobacter, Pseudarthrobacter, Lactococcus, Chloroplast, Saccharopolyspora, Psychrobacter, Saccharopolyspora, Pseudonocardiaceae, Bacteroides genera and fungi from the Thermoascus, Aspergillus, Pichia, Rhizomucor, Papiliotrema, Hyphopichia, and Mucor genera significantly inhibited the synthesis of ethyl hexanoate, ethyl butanoate, ethyl lactate ethyl lactate, and butyl acetate but increased the synthesis of ethyl acetate (p < 0.05). Moreover, these microbes exhibited a significantly greater abundance in proso millet-sorghum mixed fermentation samples than in sorghum samples. The synthesis of special flavored compounds in proso millet Baijiu was significantly positively correlated with the presence of fungi from the Rhizopus, Papiliotrema, Wickerhamomyces, Aspergillus, and Thermoascus genera but negative correlated with the presence of bacteria from the Weissella, Acinetobacter, Psychrobacter, Pseudarthrobacter, Bacteroides, and Saccharopolyspora genera. Regarding ethanol content, the low alcohol content of Fenjiu may be due to the significantly high abundance of fungi from the Psathyrella genus and bacteria from the Staphylococcus, Kroppenstedtia, Brevibacterium, and Acetobacter genera during fermentation. In summary, proso millet significantly altered the flavor of light-flavored Baijiu by inducing the formation of a special microbial community; however, it did not increase alcohol concentration. Discussion This study lays the foundation for future research on Baijiu fermentation. Additionally, the study findings may help improve the production efficiency and elevate the quality and flavor of the final product.
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Affiliation(s)
- Jia Zhao
- Department of Biological Science and Technology, Jinzhong University, Jinzhong, China
| | - Zhenfeng Gao
- College of Food Science and Engineering, Shanxi Agriculture University, Jinzhong, China
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Hussan H, Clinton SK, Grainger EM, Webb M, Wang C, Webb A, Needleman B, Noria S, Zhu J, Choueiry F, Pietrzak M, Bailey MT. Distinctive patterns of sulfide- and butyrate-metabolizing bacteria after bariatric surgery: potential implications for colorectal cancer risk. Gut Microbes 2023; 15:2255345. [PMID: 37702461 PMCID: PMC10501170 DOI: 10.1080/19490976.2023.2255345] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/18/2023] [Revised: 08/09/2023] [Accepted: 08/31/2023] [Indexed: 09/14/2023] Open
Abstract
Despite improved cardiometabolic outcomes following bariatric surgery, its long-term impact on colorectal cancer (CRC) risk remains uncertain. In parallel, the influence of bariatric surgery on the host microbiome and relationships with disease outcomes is beginning to be appreciated. Therefore, we investigated the impact of Roux-en-Y gastric bypass (RYGB) and vertical sleeve gastrectomy (VSG) on the patterns of sulfide-reducing and butyrate-producing bacteria, which are hypothesized to modulate CRC risk after bariatric surgery. In this single-center, cross-sectional study, we included 15 pre-surgery subjects with severe obesity and patients who are at a median (range) of 25.6 (9.9-46.5) months after RYGB (n = 16) or VSG (n = 10). The DNA abundance of fecal bacteria and enzymes involved in butyrate and sulfide metabolism were identified using metagenomic sequencing. Differences between pre-surgery and post-RYGB or post-VSG cohorts were quantified using the linear discriminant analysis (LDA) effect size (LEfSe) method. Our sample was predominantly female (87%) with a median (range) age of 46 (23-71) years. Post-RYGB and post-VSG patients had a higher DNA abundance of fecal sulfide-reducing bacteria than pre-surgery controls (LDA = 1.3-4.4, p < .05). The most significant enrichments were for fecal E. coli, Acidaminococcus and A. finegoldii after RYGB, and for A. finegoldii, S. vestibularis, V. parvula after VSG. As for butyrate-producing bacteria, R. faecis was more abundant, whereas B. dentium and A. hardus were lower post-RYGB vs. pre-surgery. B. dentium was also lower in post-VSG vs. pre-surgery. Consistent with these findings, our analysis showed a greater enrichment of sulfide-reducing enzymes after bariatric surgery, especially RYGB, vs. pre-surgery. The DNA abundance of butyrate-producing enzymes was lower post-RYGB. In conclusion, the two most used bariatric surgeries, RYGB and VSG, are associated with microbiome patterns that are potentially implicated in CRC risk. Future studies are needed to validate and understand the impact of these microbiome changes on CRC risk after bariatric surgery.
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Affiliation(s)
- Hisham Hussan
- Division of Gastroenterology, Department of Internal Medicine, University of California, Davis; Sacramento, CA, USA
- The UC Davis Comprehensive Cancer Center, Sacramento, CA, USA
| | - Steven K. Clinton
- Division of Medical Oncology; Department of Internal Medicine, The Ohio StateUniversity, Columbus, OH, USA
- The Ohio State University Comprehensive Cancer Center, Columbus, OH, USA
| | - Elizabeth M. Grainger
- Division of Medical Oncology; Department of Internal Medicine, The Ohio StateUniversity, Columbus, OH, USA
- The Ohio State University Comprehensive Cancer Center, Columbus, OH, USA
| | - Maxine Webb
- Division of Medical Oncology; Department of Internal Medicine, The Ohio StateUniversity, Columbus, OH, USA
- The Ohio State University Comprehensive Cancer Center, Columbus, OH, USA
| | - Cankun Wang
- Division of Biomedical Informatics, Department of Biomedical Informatics, The Ohio State University, Columbus, OH, USA
| | - Amy Webb
- Division of Biomedical Informatics, Department of Biomedical Informatics, The Ohio State University, Columbus, OH, USA
| | - Bradley Needleman
- Center for Minimally Invasive Surgery; Department of General Surgery, The Ohio State University, Columbus, OH, USA
| | - Sabrena Noria
- Center for Minimally Invasive Surgery; Department of General Surgery, The Ohio State University, Columbus, OH, USA
| | - Jiangjiang Zhu
- The Ohio State University Comprehensive Cancer Center, Columbus, OH, USA
- The Department of Human Sciences, The Ohio State University, Columbus, OH, USA
| | - Fouad Choueiry
- The Ohio State University Comprehensive Cancer Center, Columbus, OH, USA
- The Department of Human Sciences, The Ohio State University, Columbus, OH, USA
| | - Maciej Pietrzak
- Division of Biomedical Informatics, Department of Biomedical Informatics, The Ohio State University, Columbus, OH, USA
| | - Michael T. Bailey
- The Ohio State University Comprehensive Cancer Center, Columbus, OH, USA
- Center for Microbial Pathogenesis, Abigail Wexner Research Institute at Nationwide Children’s Hospital and Department of Pediatrics, Columbus, OH, USA
- The Oral and Gastrointestinal Microbiology Research Affinity Group, Abigail Wexner Research Institute at Nationwide Children’s Hospital, Columbus, OH, USA
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9
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Lee YH, Hong JY. Oral microbiome as a co-mediator of halitosis and periodontitis: a narrative review. FRONTIERS IN ORAL HEALTH 2023; 4:1229145. [PMID: 37719278 PMCID: PMC10500072 DOI: 10.3389/froh.2023.1229145] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2023] [Accepted: 08/18/2023] [Indexed: 09/19/2023] Open
Abstract
Objective Halitosis or oral malodor is an unpleasant odor from the oral cavity. However, although patients with periodontitis often complain of halitosis, their relationship has not been fully elucidated. We reviewed previous literature based on the hypothesis that the relationship between halitosis and periodontitis is mediated by the oral microbiome. Materials and methods This narrative review sought to provide insight into the causative role of the oral microbiome in influencing halitosis and periodontitis. In addition, we tried to deepen knowledge related to the relationship between halitosis and periodontitis generated by the oral microbiome accumulated over the past 40 years. Results From 1984 to 2023, a total of 106 papers that carefully and scientifically dealt with halitosis and periodontitis were included in this narrative review. Based on previous results, halitosis and periodontitis were closely related. For decades, researchers have taken an intriguing approach to the question of whether there is a relationship between halitosis and periodontitis. Central factors in the relationship between halitosis and periodontitis include volatile sulfur compounds (VSCs), the oral microbiota that produce VSCs, and the inflammatory response. Conclusions Taken together, the more severe periodontitis, the higher the level of VSC in halitosis, which may be mediated by oral microbiome. However, the relationship between the occurrence, maintenance, and exacerbation of periodontitis and halitosis is not a necessary and sufficient condition for each other because they are complex interplay even in one individual.
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Affiliation(s)
- Yeon-Hee Lee
- Department of Orofacial Pain and Oral Medicine, Kyung Hee University School of Dentistry, Kyung Hee University Medical Center, Seoul, Republic of Korea
| | - Ji-Youn Hong
- Department of Periodontology, Periodontal-Implant Clinical Research Institute, School of Dentistry, Kyung Hee University, Seoul, Republic of Korea
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10
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Wuri G, Liu F, Sun Z, Fang B, Zhao W, Hung WL, Liu WH, Zhang X, Wang R, Wu F, Zhao L, Zhang M. Lactobacillus paracasei ET-22 and derived postbiotics reduce halitosis and modulate oral microbiome dysregulation - a randomized, double-blind placebo-controlled clinical trial. Food Funct 2023; 14:7335-7346. [PMID: 37493204 DOI: 10.1039/d3fo02271d] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/27/2023]
Abstract
Oral microbial dysbiosis is the primary etiologic factor for halitosis and may be the critical preventive target for halitosis. This study included randomized controlled trials (RCTs) assessing the effects of Lactobacillus paracasei ET-22 live and heat-killed bacteria on halitosis and the related oral microbiome. 68 halitosis subjects were divided into placebo, ET-22 live (ET-22.L) and ET-22 heat-killed (ET-22.HK) groups. Subjects took different lozenges three times a day for 4 weeks and underwent saliva collection and assessment of breath volatile sulfur compound (VSC) levels at the beginning and end of the intervention. Salivary volatile organic compounds were measured using HS-SPME-GC/MS, and the microbiome profile was determined by 16S rRNA gene amplicon sequencing. A positive decrease in breath volatile sulfur compound (VSC) levels was observed in the means of both ET-22.L and ET-22.HK groups after 4 weeks of intervention, being more marked in the ET-22.L group (p = 0.0148). Moreover, ET-22.L and ET-22.HK intervention remarkably changed the composition of total salivary volatile organic compounds (VOCs) and aroma-active VOCs. Key undesirable VOCs, such as indole, pyridine, nonanoic acid, benzothiazole, and valeric acid, were significantly reduced. Meanwhile, ET-22.L or ET-22.HK also altered the taxonomic composition of the salivary microbiome. The halitosis pathogens Rothia and Streptococcus were significantly reduced in the ET-22.HK group and the pathogenic Solobacterium and Peptostreptococcus were significantly inhibited in the ET-22.L group. Collectively, our study suggests that both ET-22.L and ET-22.HK can significantly inhibit the production of undesirable odor compounds in subjects with halitosis, which may be related to the changes of the oral microbiome.
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Affiliation(s)
- Guna Wuri
- School of Food and Health, Beijing Technology and Business University, Beijing 100024, China.
| | - Fudong Liu
- Inner Mongolia Dairy Technology Research Institute Co., Ltd., Hohhot 010100, China
- Inner Mongolia Yili Industrial Group Co., Ltd., Hohhot 010100, China
| | - Zhe Sun
- School of Food and Health, Beijing Technology and Business University, Beijing 100024, China.
| | - Bing Fang
- Key Laboratory of Precision Nutrition and Food Quality, Department of Nutrition and Health, China Agricultural University, Beijing 100083, China
| | - Wen Zhao
- Inner Mongolia Dairy Technology Research Institute Co., Ltd., Hohhot 010100, China
- Inner Mongolia Yili Industrial Group Co., Ltd., Hohhot 010100, China
| | - Wei-Lian Hung
- Inner Mongolia Dairy Technology Research Institute Co., Ltd., Hohhot 010100, China
- Inner Mongolia Yili Industrial Group Co., Ltd., Hohhot 010100, China
| | - Wei-Hsien Liu
- Inner Mongolia Dairy Technology Research Institute Co., Ltd., Hohhot 010100, China
- Inner Mongolia Yili Industrial Group Co., Ltd., Hohhot 010100, China
| | - Xiaoxu Zhang
- Key Laboratory of Precision Nutrition and Food Quality, Department of Nutrition and Health, China Agricultural University, Beijing 100083, China
| | - Ran Wang
- Key Laboratory of Precision Nutrition and Food Quality, Department of Nutrition and Health, China Agricultural University, Beijing 100083, China
| | - Fang Wu
- Key Laboratory of Precision Nutrition and Food Quality, Department of Nutrition and Health, China Agricultural University, Beijing 100083, China
| | - Liang Zhao
- Key Laboratory of Functional Dairy, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China
- Beijing Laboratory of Food Quality and Safety, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, 100083, China
| | - Ming Zhang
- School of Food and Health, Beijing Technology and Business University, Beijing 100024, China.
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11
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Izidoro C, Botelho J, Machado V, Reis AM, Proença L, Barroso H, Alves R, Mendes JJ. Non-Surgical Periodontal Treatment Impact on Subgingival Microbiome and Intra-Oral Halitosis. Int J Mol Sci 2023; 24:ijms24032518. [PMID: 36768839 PMCID: PMC9916745 DOI: 10.3390/ijms24032518] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2023] [Revised: 01/25/2023] [Accepted: 01/26/2023] [Indexed: 02/03/2023] Open
Abstract
The purpose of this study was to characterize and compare subgingival microbiome before and after periodontal treatment to learn if any changes of the subgingival microbiome were reflected in intra-oral halitosis. We tested the hypothesis that intra-oral halitosis (Volatile sulfur compounds levels) correlates with corresponding subgingival bacterial levels before and after periodontal treatment. Twenty patients with generalized periodontitis completed the study. Subgingival plaque samples were collected at baseline and 6-8 weeks after nonsurgical periodontal therapy. Full-mouth periodontal status assessed probing depth (PD), clinical attachment loss (CAL), gingival recession (REC), bleeding on probing (BoP), PISA and PESA. Halitosis assessment was made using a volatile sulfur compounds (VSC) detector device. Periodontal measures were regressed across VSC values using adjusted multivariate linear analysis. The subgingival microbiome was characterized by sequencing on an Illumina platform. From a sample of 20 patients referred to periodontal treatment, 70% were females (n = 14), with a mean age of 56.6 (±10.3) years; full-mouth records of PD, CAL, BOP (%) allowed to classify the stage and grade of periodontitis, with 45% (n = 9) of the sample having Periodontitis Stage IV grade C and 95% (n = 19) had generalized periodontitis. The correlation of bacterial variation with VSCs measured in the periodontal diagnosis and in the reassessment after treatment were evaluated. Fusobacterium nucleatum, Capnocytophaga gingivalis and Campylobacter showaei showed correlation with the reduction of VSC after periodontal treatment (p-value = 0.044; 0.047 and 0.004, respectively). Capnocytophaga sputigena had a significant reverse correlation between VSCs variation from diagnosis (baseline) and after treatment. Microbial diversity was high in the subgingival plaque on periodontitis and intra-oral halitosis participants of the study. Furthermore, there were correlations between subgingival plaque composition and VSC counting after periodontal treatment. The subgingival microbiome can offer important clues in the investigation of the pathogenesis and treatment of halitosis.
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Affiliation(s)
- Catarina Izidoro
- Periodontology Department, Egas Moniz Center for Interdisciplinary Research, Egas Moniz School of Health & Science, 2829-511 Almada, Portugal
- Clinical Research Unit (CRU), Egas Moniz Center for Interdisciplinary Research, Egas Moniz School of Health & Science, 2829-511 Almada, Portugal
- Correspondence: ; Tel.: +351-212-946-737
| | - João Botelho
- Periodontology Department, Egas Moniz Center for Interdisciplinary Research, Egas Moniz School of Health & Science, 2829-511 Almada, Portugal
- Clinical Research Unit (CRU), Egas Moniz Center for Interdisciplinary Research, Egas Moniz School of Health & Science, 2829-511 Almada, Portugal
| | - Vanessa Machado
- Periodontology Department, Egas Moniz Center for Interdisciplinary Research, Egas Moniz School of Health & Science, 2829-511 Almada, Portugal
- Clinical Research Unit (CRU), Egas Moniz Center for Interdisciplinary Research, Egas Moniz School of Health & Science, 2829-511 Almada, Portugal
| | - Ana Mafalda Reis
- Instituto de Ciências Biomédicas Abel Salazar, School of Health and Life Sciences, University of Porto, 4099-002 Porto, Portugal
- Neuroradiology Department, Hospital Pedro Hispano, 4464-513 Matosinhos, Portugal
| | - Luís Proença
- Quantitative Methods for Health Research Unit (MQIS), Egas Moniz Center for Interdisciplinary Research, Egas Moniz School of Health & Science, 2829-511 Almada, Portugal
| | - Helena Barroso
- Microbiology and Public Health Unit, Egas Moniz Center for Interdisciplinary Research, Egas Moniz School of Health & Science, 2829-511 Almada, Portugal
| | - Ricardo Alves
- Periodontology Department, Egas Moniz Center for Interdisciplinary Research, Egas Moniz School of Health & Science, 2829-511 Almada, Portugal
- Clinical Research Unit (CRU), Egas Moniz Center for Interdisciplinary Research, Egas Moniz School of Health & Science, 2829-511 Almada, Portugal
| | - José João Mendes
- Clinical Research Unit (CRU), Egas Moniz Center for Interdisciplinary Research, Egas Moniz School of Health & Science, 2829-511 Almada, Portugal
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12
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Szalai E, Tajti P, Szabó B, Hegyi P, Czumbel LM, Shojazadeh S, Varga G, Németh O, Keremi B. Daily use of chlorine dioxide effectively treats halitosis: A meta-analysis of randomised controlled trials. PLoS One 2023; 18:e0280377. [PMID: 36634129 PMCID: PMC9836286 DOI: 10.1371/journal.pone.0280377] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2022] [Accepted: 12/27/2022] [Indexed: 01/13/2023] Open
Abstract
OBJECTIVES We aimed to conduct a systematic review on published data in order to investigate the efficacy of mouthwash products containing chlorine dioxide in halitosis. STUDY DESIGN Systematic review and meta-analysis. METHODS Our search was conducted on 14th October 2021. We searched the following electronic databases: MEDLINE, Embase, Scopus, Web of Science, and CENTRAL. We analysed data on adults with halitosis, included only randomised controlled trials and excluded in vitro and animal studies. The interventional groups used chlorine dioxide, and the comparator groups used a placebo or other mouthwash. Our primary outcomes were changes in organoleptic test scores (OLS) and Volatile Sulfur Compound (VSC) levels from baseline to the last available follow-up. RESULTS We found 325 articles in databases. After the selection process, ten articles were eligible for qualitative synthesis, and 7 RCTs with 234 patients were involved in the meta-analysis. Our findings showed a significant improvement in the parameters of the chlorine dioxide group compared to the placebo group in OLS one-day data (mean difference (MD): -0.82; 95% confidence intervals (95% CIs): [-1.04 --0.6]; heterogeneity: I2 = 0%, p = 0.67); and one-week OLS data (MD: -0.24; 95% CIs: [-0.41 --0.07]; I2 = 0%, p = 0.52); and also changes in H2S one-day data (standardised mean difference (SMD): -1.81; 95% CIs: [-2.52 --1.10]); I2 = 73.4%, p = 0.02). CONCLUSION Our data indicate that chlorine dioxide mouthwash may be a good supportive therapy in oral halitosis without known side effects.
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Affiliation(s)
- Eszter Szalai
- Department of Restorative Dentistry and Endodontics, Semmelweis University, Budapest, Hungary
- Centre for Translational Medicine, Semmelweis University, Budapest, Hungary
| | - Péter Tajti
- Centre for Translational Medicine, Semmelweis University, Budapest, Hungary
- Department of Prosthodontics, Semmelweis University, Budapest, Hungary
| | - Bence Szabó
- Centre for Translational Medicine, Semmelweis University, Budapest, Hungary
| | - Péter Hegyi
- Centre for Translational Medicine, Semmelweis University, Budapest, Hungary
- Institute for Translational Medicine, Szentágothai Research Centre, Medical School, University of Pécs, Pécs, Hungary
- Institute of Pancreatic Diseases, Semmelweis University, Budapest, Hungary
| | - László Márk Czumbel
- Centre for Translational Medicine, Semmelweis University, Budapest, Hungary
- Department of Periodontology, Semmelweis University, Budapest, Hungary
| | | | - Gábor Varga
- Centre for Translational Medicine, Semmelweis University, Budapest, Hungary
- Department of Oral Biology, Semmelweis University, Budapest, Hungary
| | - Orsolya Németh
- Centre for Translational Medicine, Semmelweis University, Budapest, Hungary
- Department of Community Dentistry, Semmelweis University, Budapest, Hungary
| | - Beata Keremi
- Department of Restorative Dentistry and Endodontics, Semmelweis University, Budapest, Hungary
- Centre for Translational Medicine, Semmelweis University, Budapest, Hungary
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13
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Huang N, Li J, Qiao X, Wu Y, Liu Y, Wu C, Li L. Efficacy of probiotics in the management of halitosis: a systematic review and meta-analysis. BMJ Open 2022; 12:e060753. [PMID: 36600415 PMCID: PMC9809225 DOI: 10.1136/bmjopen-2022-060753] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
BACKGROUND Halitosis is defined as a foul odour emitted from the oral cavity. Many interventions have been used to control halitosis from mouthwashes to chewing gums. Probiotics have been reported as an alternative method to alleviate halitosis. OBJECTIVE The present study aimed to investigate the effect of probiotics on halitosis from a time perspective. DESIGN AND METHODS This is a meta-analysis study performed in indexed databases up to February 2021. Randomised controlled trials that compared the effects of probiotics and placebo on primary outcomes (organoleptic (OLP) scores and volatile sulfur compound (VSC) levels) and secondary outcomes (tongue coating scores (TCS) and plaque index (PI)) were included. Data extraction and quality assessment were conducted independently by two reviewers. Publication bias and leave-one-out analyses were performed. RESULTS The standardised mean difference (SMD) and 95% CI were calculated to synthesise data. The data were subgrouped and analysed in the short term (≤4 weeks) and long term (>4 weeks) based on the follow-up time. Seven articles were included in this meta-analysis. The primary outcomes, OLP scores (SMD=-0.58; 95% CI -0.87 to -0.30, p<0.0001) and VSC levels (SMD=-0.26; 95% CI -0.51 to -0.01, p=0.04), both decreased significantly in the probiotics group compared with the placebo group in the short term. However, a significant reduction was observed only in OLP scores (SMD=-0.45; 95% CI -0.85 to -0.04, p=0.03) in the long term. No significant differences were observed in secondary outcomes. There was no evidence of publication bias. The leave-one-out analysis confirmed that the pooled estimate was stable. CONCLUSIONS According to the results of this work, it seems that probiotics (eg, Lactobacillus salivarius, Lactobacillus reuteri, Streptococcus salivarius and Weissella cibaria) may relieve halitosis in the short term (≤4 weeks). The results of the biased assessment, limited data and heterogeneity of the clinical trials included might reduce the reliability of the conclusions.
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Affiliation(s)
- Nengwen Huang
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, Department of Head and Neck Oncology, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Jinjin Li
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, Department of Head and Neck Oncology, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Xianghe Qiao
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, Department of Head and Neck Oncology, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Yongzhi Wu
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, Department of Head and Neck Oncology, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Yunkun Liu
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, Department of Head and Neck Oncology, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Chenzhou Wu
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, Department of Head and Neck Oncology, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Longjiang Li
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, Department of Head and Neck Oncology, West China Hospital of Stomatology, Sichuan University, Chengdu, China
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14
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The tongue biofilm metatranscriptome identifies metabolic pathways associated with the presence or absence of halitosis. NPJ Biofilms Microbiomes 2022; 8:100. [PMID: 36535943 PMCID: PMC9763428 DOI: 10.1038/s41522-022-00364-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2022] [Accepted: 12/06/2022] [Indexed: 12/23/2022] Open
Abstract
Intra-oral halitosis usually results from the production of volatile sulfur compounds, such as methyl mercaptan and hydrogen sulfide, by the tongue microbiota. There are currently no reports on the microbial gene-expression profiles of the tongue microbiota in halitosis. In this study, we performed RNAseq of tongue coating samples from individuals with and without halitosis. The activity of Streptococcus (including S. parasanguinis), Veillonella (including V. dispar) and Rothia (including R. mucilaginosa) was associated with halitosis-free individuals while Prevotella (including P. shahi), Fusobacterium (including F. nucleatum) and Leptotrichia were associated with halitosis. Interestingly, the metatranscriptome of patients that only had halitosis levels of methyl mercaptan was similar to that of halitosis-free individuals. Finally, gene expression profiles showed a significant over-expression of genes involved in L-cysteine and L-homocysteine synthesis, as well as nitrate reduction genes, in halitosis-free individuals and an over-expression of genes responsible for cysteine degradation into hydrogen sulfide in halitosis patients.
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15
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Hu Y, Amir A, Huang X, Li Y, Huang S, Wolfe E, Weiss S, Knight R, Xu ZZ. Diurnal and eating-associated microbial patterns revealed via high-frequency saliva sampling. Genome Res 2022; 32:1112-1123. [PMID: 35688483 DOI: 10.1101/gr.276482.121] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2021] [Accepted: 05/18/2022] [Indexed: 11/24/2022]
Abstract
The oral microbiome is linked to oral and systemic health, but its fluctuation under frequent daily activities remains elusive. Here, we sampled saliva at 10- to 60-min intervals to track the high-resolution microbiome dynamics during the course of human activities. This dense time series data showed that eating activity markedly perturbed the salivary microbiota, with tongue-specific Campylobacter concisus and Oribacterium sinus and dental plaque-specific Lautropia mirabilis, Rothia aeria, and Neisseria oralis increased after every meal in a temporal order. The observation was reproducible in multiple subjects and across an 11-mo period. The microbiome composition showed significant diurnal oscillation patterns at different taxonomy levels with Prevotella/Alloprevotella increased at night and Bergeyella HMT 206/Haemophilus slowly increased during the daytime. We also identified microbial co-occurring patterns in saliva that are associated with the intricate biogeography of the oral microbiome. Microbial source tracking analysis showed that the contributions of distinct oral niches to the salivary microbiome were dynamically affected by daily activities, reflecting the role of saliva in exchanging microbes with other oral sites. Collectively, our study provides insights into the temporal microbiome variation in saliva and highlights the need to consider daily activities and diurnal factors in design of oral microbiome studies.
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Affiliation(s)
- Yichen Hu
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang, Jiangxi 330047, PR China
| | - Amnon Amir
- Department of Pediatrics, University of California San Diego, La Jolla, California 92093, USA.,Sheba Medical Center, Ramat Gan 52621, Israel
| | - Xiaochang Huang
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang, Jiangxi 330047, PR China
| | - Yan Li
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang, Jiangxi 330047, PR China
| | - Shi Huang
- Department of Pediatrics, University of California San Diego, La Jolla, California 92093, USA
| | - Elaine Wolfe
- Department of Pediatrics, University of California San Diego, La Jolla, California 92093, USA
| | - Sophie Weiss
- Department of Chemical and Biological Engineering, University of Colorado at Boulder, Boulder, Colorado 80309, USA
| | - Rob Knight
- Department of Pediatrics, University of California San Diego, La Jolla, California 92093, USA.,Center for Microbiome Innovation, University of California San Diego, La Jolla, California 92093, USA.,Department of Computer Science and Engineering, University of California San Diego, La Jolla, California 92093, USA.,Department of Bioengineering, University of California San Diego, La Jolla, California 92093, USA
| | - Zhenjiang Zech Xu
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang, Jiangxi 330047, PR China.,Shenzhen Stomatology Hospital (Pingshan), Southern Medical University, Shenzhen 518001, China.,Microbiome Medicine Center, Department of Laboratory Medicine, Zhujiang Hospital, Southern Medical University, Guangzhou, Guangdong 510280, China
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16
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Oba PM, Sieja KM, Keating SCJ, Hristova T, Somrak AJ, Swanson KS. Oral Microbiota Populations of Adult Dogs Consuming Wet or Dry Foods. J Anim Sci 2022; 100:6596187. [PMID: 35641105 DOI: 10.1093/jas/skac200] [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: 02/08/2022] [Accepted: 05/26/2022] [Indexed: 11/14/2022] Open
Abstract
Oral microbiota play a prominent role in canine periodontal disease and wet foods are often blamed for poor oral health, but canine oral microbial communities have been poorly studied. We aimed to determine differences in oral health measures, breath odor, and oral microbiota populations of dogs fed wet or dry food. Twelve adult dogs fed either a commercial dry (extruded) or commercial wet (canned) food for 6 wk were studied. Breath samples were measured for sulfur compounds, teeth were scored for plaque, calculus, and gingivitis by a blinded veterinary dentist, salivary pH was measured, and supragingival (SUP) and subgingival (SUB) plaque samples were collected for microbiota analysis. Plaque DNA was extracted and Illumina sequencing conducted. Phylogenetic data were analyzed using the CosmosID bioinformatics platform and SAS 9.4, with P<0.05 being significant and P<0.10 being trends. Plaque coverage tended to be higher (P<0.10) in dogs fed wet vs. dry food, but other oral health scores were not different. Dogs fed dry food had higher (P<0.05) salivary pH and lower (P<0.05) breath sulfur concentrations than those consuming wet food. Bacterial alpha diversity was higher in SUP than SUB samples, and a clear separation in beta diversity was observed between sample sites on principal coordinates analysis (PCoA) plots. In SUP samples, dogs fed wet food had a higher alpha diversity than dogs fed dry food, with PCoA plots showing a separation between wet and dry food. Relative abundances of Firmicutes, Synergistetes, and 10 bacterial genera were different (P<0.05) in SUB samples of dogs fed wet vs. dry food. Relative abundances of Fusobacteria and over 20 bacterial genera were different (P<0.05) in SUP samples of dogs fed wet vs. dry food. In general, oral health-associated bacterial taxa (Pasteurella, Capnocytophaga, Corynebacterium) were higher, while bacteria associated with poor oral health (Fretibacterium fastidiosum, Filifactor alocis, Treponema medium, Tannerella forsythia, Porphyromonas canoris, Porphyromonas gingivalis) were lower in dogs fed dry food. Such shifts in the oral microbiota may impact periodontal disease risk, but longer dietary intervention studies are required to confirm their role in the disease process. Our results suggest that dogs fed dry extruded foods have lower breath odor and tooth plaque buildup and an oral microbiota population more closely associated with oral health than dogs fed wet canned foods.
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Affiliation(s)
- Patrícia M Oba
- Department of Animal Sciences, University of Illinois at Urbana-Champaign, Urbana, IL 61801 USA
| | - Kelly M Sieja
- Department of Animal Sciences, University of Illinois at Urbana-Champaign, Urbana, IL 61801 USA
| | - Stephanie C J Keating
- Department of Veterinary Clinical Medicine, College of Veterinary Medicine, University of Illinois at Urbana-Champaign, Urbana, IL 61801 USA
| | - Teodora Hristova
- Department of Veterinary Clinical Medicine, College of Veterinary Medicine, University of Illinois at Urbana-Champaign, Urbana, IL 61801 USA
| | - Amy J Somrak
- Department of Veterinary Clinical Medicine, College of Veterinary Medicine, University of Illinois at Urbana-Champaign, Urbana, IL 61801 USA
| | - Kelly S Swanson
- Department of Animal Sciences, University of Illinois at Urbana-Champaign, Urbana, IL 61801 USA.,Division of Nutritional Sciences, University of Illinois at Urbana-Champaign, Urbana IL 61801 USA.,Department of Veterinary Clinical Medicine, College of Veterinary Medicine, University of Illinois at Urbana-Champaign, Urbana, IL 61801 USA
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17
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Li X, Liu Y, Yang X, Li C, Song Z. The Oral Microbiota: Community Composition, Influencing Factors, Pathogenesis, and Interventions. Front Microbiol 2022; 13:895537. [PMID: 35572634 PMCID: PMC9100676 DOI: 10.3389/fmicb.2022.895537] [Citation(s) in RCA: 83] [Impact Index Per Article: 41.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2022] [Accepted: 04/06/2022] [Indexed: 12/12/2022] Open
Abstract
The human oral cavity provides a habitat for oral microbial communities. The complexity of its anatomical structure, its connectivity to the outside, and its moist environment contribute to the complexity and ecological site specificity of the microbiome colonized therein. Complex endogenous and exogenous factors affect the occurrence and development of the oral microbiota, and maintain it in a dynamic balance. The dysbiotic state, in which the microbial composition is altered and the microecological balance between host and microorganisms is disturbed, can lead to oral and even systemic diseases. In this review, we discuss the current research on the composition of the oral microbiota, the factors influencing it, and its relationships with common oral diseases. We focus on the specificity of the microbiota at different niches in the oral cavity, the communities of the oral microbiome, the mycobiome, and the virome within oral biofilms, and interventions targeting oral pathogens associated with disease. With these data, we aim to extend our understanding of oral microorganisms and provide new ideas for the clinical management of infectious oral diseases.
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Affiliation(s)
- Xinyi Li
- School of Stomatology, Southwest Medical University, Luzhou, China
| | - Yanmei Liu
- School of Stomatology, Southwest Medical University, Luzhou, China
| | - Xingyou Yang
- Molecular Biotechnology Platform, Public Center of Experimental Technology, School of Basic Medical Sciences, Southwest Medical University, Luzhou, China
| | - Chengwen Li
- Molecular Biotechnology Platform, Public Center of Experimental Technology, School of Basic Medical Sciences, Southwest Medical University, Luzhou, China
- *Correspondence: Chengwen Li,
| | - Zhangyong Song
- Molecular Biotechnology Platform, Public Center of Experimental Technology, School of Basic Medical Sciences, Southwest Medical University, Luzhou, China
- Zhangyong Song,
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18
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Jiang J, Huang Y, Luo N, Mi Q, Li X, Zhang W, Sun S, Zhu B, Gao Q. Correlation between the salivary microbiology and H
2
S concentration of the oral cavity. Oral Dis 2022. [DOI: 10.1111/odi.14211] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2021] [Revised: 03/11/2022] [Accepted: 04/10/2022] [Indexed: 11/26/2022]
Affiliation(s)
- Jiarui Jiang
- Joint Institute of Tobacco and Health Yunnan Academy of Tobacco Science Kunming China
| | - Yufen Huang
- Joint Institute of Tobacco and Health Yunnan Academy of Tobacco Science Kunming China
| | - Na Luo
- School of Pharmaceutical Science & Yunnan Key Laboratory of Pharmacology for Natural Products Kunming Medical University Kunming China
| | - Qili Mi
- Joint Institute of Tobacco and Health Yunnan Academy of Tobacco Science Kunming China
| | - Xuemei Li
- Joint Institute of Tobacco and Health Yunnan Academy of Tobacco Science Kunming China
| | - Wei Zhang
- Joint Institute of Tobacco and Health Yunnan Academy of Tobacco Science Kunming China
| | - Silong Sun
- Joint Institute of Tobacco and Health Yunnan Academy of Tobacco Science Kunming China
| | - Baokun Zhu
- Joint Institute of Tobacco and Health Yunnan Academy of Tobacco Science Kunming China
| | - Qian Gao
- Joint Institute of Tobacco and Health Yunnan Academy of Tobacco Science Kunming China
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19
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Bachtiar BM, Soeroso Y, Sunarto H, Maitimu FC, Bachtiar EW. Relationships between Solobacterium moorei and Prevotella intermedia in subgingival microbiota of periodontitis patients with halitosis: A preliminary study using qPCR. Saudi Dent J 2022; 34:211-219. [PMID: 35935717 PMCID: PMC9346948 DOI: 10.1016/j.sdentj.2022.02.003] [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: 09/25/2021] [Revised: 01/28/2022] [Accepted: 02/08/2022] [Indexed: 10/31/2022] Open
Abstract
Objective Material & methods Results Conclusion
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20
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Ma L, Pang C, Yan C, Chen J, Wang X, Hui J, Zhou L, Zhang X. The Effect of Lemon Essential Oil on Halitosis. Oral Dis 2022; 29:1845-1854. [PMID: 35080078 DOI: 10.1111/odi.14140] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2021] [Revised: 12/23/2021] [Accepted: 01/15/2022] [Indexed: 11/29/2022]
Abstract
OBJECTIVES To evaluate the effect of lemon essential oil (LEO) on salivary bacteria and volatile sulfur compound (VSC) production of patients with halitosis. MATERIALS AND METHODS Saliva of five patients with halitosis was collected, after adding different concentrations (0.563-9 mg/ml) of LEO, detecting the growth of salivary bacteria, the formation of biofilm, and VSC production, and compare the difference of different concentrations of LEO on bacterial growth and VSC production. 48 volunteers were randomly divided into 4 groups. After gargling with LEO, cetylpyridinium chloride (CPC), chlorhexidine (CHX), and hydrogen peroxide (H2 O2 ) separately measure changes of VSC production and pH values at 30, 45, 60, 90, and 120 min and then compare the differences at different time points within group. RESULTS Compared with the negative control group, under subinhibitory concentrations of LEO (0.563-2.25 mg/ml), the biofilm formation and VSC production of salivary bacteria in LEO group were significantly inhibited (p < 0.05). Compared with the baseline, the VSC production of subjects decreased after rinsing with the LEO in 60 min (p < 0.05). After gargling with LEO, the pH value rose significantly in 30 min and reverted to the baseline level at 120 min (p < 0.05). CONCLUSIONS Lemon essential oil can inhibit the growth of salivary bacteria and reduce VSC production of patients with halitosis.
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Affiliation(s)
- Li Ma
- Department of Pediatric Dentistry School and Hospital of Stomatology Tianjin Medical University Tianjin 300070 China
| | - Chenyu Pang
- Department of Pediatric Dentistry School and Hospital of Stomatology Tianjin Medical University Tianjin 300070 China
| | - Changqing Yan
- Department of Pediatric Dentistry School and Hospital of Stomatology Tianjin Medical University Tianjin 300070 China
| | - Jing Chen
- Department of Oral Medicine Shanxi Provincial People’s Hospital Shanxi 030200 China
| | - Xiaoyu Wang
- Department of Stomatology Haidian Maternal and Child Health Hospital Beijing 100089 China
| | - Jin Hui
- Department of Pediatric Dentistry School and Hospital of Stomatology Tianjin Medical University Tianjin 300070 China
| | - Li Zhou
- Department of Pediatric Dentistry School and Hospital of Stomatology Tianjin Medical University Tianjin 300070 China
| | - Xiangyu Zhang
- Department of Pediatric Dentistry School and Hospital of Stomatology Tianjin Medical University Tianjin 300070 China
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21
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Maitimu FC, Soeroso Y, Sunarto H, Bachtiar BM. Association between Volatile Sulfur Compounds Prevotella intermedia and Matrix Metalloproteinase-8 Expression. PESQUISA BRASILEIRA EM ODONTOPEDIATRIA E CLÍNICA INTEGRADA 2022. [DOI: 10.1590/pboci.2022.049] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/09/2022] Open
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22
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Sotozono M, Kuriki N, Asahi Y, Noiri Y, Hayashi M, Motooka D, Nakamura S, Yamaguchi M, Iida T, Ebisu S. Impact of sleep on the microbiome of oral biofilms. PLoS One 2021; 16:e0259850. [PMID: 34882696 PMCID: PMC8659294 DOI: 10.1371/journal.pone.0259850] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2021] [Accepted: 10/27/2021] [Indexed: 12/29/2022] Open
Abstract
Dysbiosis of the oral microbiome is associated with diseases such as periodontitis and dental caries. Because the bacterial counts in saliva increase markedly during sleep, it is broadly accepted that the mouth should be cleaned before sleep to help prevent these diseases. However, this practice does not consider oral biofilms, including the dental biofilm. This study aimed to investigate sleep-related changes in the microbiome of oral biofilms by using 16S rRNA gene sequence analysis. Two experimental schedules—post-sleep and pre-sleep biofilm collection—were applied to 10 healthy subjects. Subjects had their teeth and oral mucosa professionally cleaned 7 days and 24 h before sample collection. Samples were collected from several locations in the oral cavity: the buccal mucosa, hard palate, tongue dorsum, gingival mucosa, tooth surface, and saliva. Prevotella and Corynebacterium had higher relative abundance on awakening than before sleep in all locations of the oral cavity, whereas fluctuations in Rothia levels differed depending on location. The microbiome in different locations in the oral cavity is affected by sleep, and changes in the microbiome composition depend on characteristics of the surfaces on which oral biofilms form.
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Affiliation(s)
- Maki Sotozono
- Division of Cariology, Operative Dentistry and Endodontics, Department of Oral Health Science, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan
| | - Nanako Kuriki
- Department of Restorative Dentistry and Endodontology, Osaka University Graduate School of Dentistry, Suita, Osaka, Japan
| | - Yoko Asahi
- Department of Restorative Dentistry and Endodontology, Osaka University Graduate School of Dentistry, Suita, Osaka, Japan
- * E-mail:
| | - Yuichiro Noiri
- Division of Cariology, Operative Dentistry and Endodontics, Department of Oral Health Science, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan
| | - Mikako Hayashi
- Department of Restorative Dentistry and Endodontology, Osaka University Graduate School of Dentistry, Suita, Osaka, Japan
| | - Daisuke Motooka
- Research Institute for Microbial Diseases, Osaka University, Suita, Osaka, Japan
| | - Shota Nakamura
- Research Institute for Microbial Diseases, Osaka University, Suita, Osaka, Japan
| | - Mikiyo Yamaguchi
- Department of Restorative Dentistry and Endodontology, Osaka University Graduate School of Dentistry, Suita, Osaka, Japan
| | - Tetsuya Iida
- Research Institute for Microbial Diseases, Osaka University, Suita, Osaka, Japan
| | - Shigeyuki Ebisu
- Department of Restorative Dentistry and Endodontology, Osaka University Graduate School of Dentistry, Suita, Osaka, Japan
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Zanetti F, Zivkovic Semren T, Battey JND, Guy PA, Ivanov NV, van der Plas A, Hoeng J. A Literature Review and Framework Proposal for Halitosis Assessment in Cigarette Smokers and Alternative Nicotine-Delivery Products Users. FRONTIERS IN ORAL HEALTH 2021; 2:777442. [PMID: 35048075 PMCID: PMC8757736 DOI: 10.3389/froh.2021.777442] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2021] [Accepted: 11/15/2021] [Indexed: 12/03/2022] Open
Abstract
Halitosis is a health condition which counts cigarette smoking (CS) among its major risk factors. Cigarette smoke can cause an imbalance in the oral bacterial community, leading to several oral diseases and conditions, including intraoral halitosis. Although the best approach to decrease smoking-related health risks is quitting smoking, this is not feasible for many smokers. Switching to potentially reduced-risk products, like electronic vapor products (EVP) or heated tobacco products (HTP), may help improve the conditions associated with CS. To date, there have been few systematic studies on the effects of CS on halitosis and none have assessed the effects of EVP and HTP use. Self-assessment studies have shown large limitations owing to the lack of reliability in the participants' judgment. This has compelled the scientific community to develop a strategy for meaningful assessment of these new products in comparison with cigarettes. Here, we compiled a review of the existing literature on CS and halitosis and propose a 3-layer approach that combines the use of the most advanced breath analysis techniques and multi-omics analysis to define the interactions between oral bacterial species and their role in halitosis both in vitro and in vivo. Such an approach will allow us to compare the effects of different nicotine-delivery products on oral bacteria and quantify their impact on halitosis. Defining the impact of alternative nicotine-delivery products on intraoral halitosis and its associated bacteria will help the scientific community advance a step further toward understanding the safety of these products and their potentiall risks for consumers.
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Affiliation(s)
- Filippo Zanetti
- PMI R&D, Philip Morris Products S.A., Neuchâtel, Switzerland
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24
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Botelho Dinis M, Agnello M, He X, Shi W, Chaichanasakul Tran N. Pilot study on selective antimicrobial effect of a halitosis mouthrinse: monospecies and saliva-derived microbiome in an in vitro model system. J Oral Microbiol 2021; 13:1996755. [PMID: 34745444 PMCID: PMC8567964 DOI: 10.1080/20002297.2021.1996755] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
Background Halitosis refers to malodor emanating from the oral cavity. Several mouthrinses with halitosis-reduction exist on the market, but their effect on the oral microbiome is largely unknown. In this study, we used an efficient in vitro model system to investigate a test mouthrinse's impact on the oral microbiome. Methods Single halitosis-associated species and other common oral microorganism cultures were exposed to the test mouthrinse over time, and their viability was determined by culture-based selective plating. Next, the saliva-derived microbiome from healthy and halitosis-associated individuals was cultured in the presence of the test mouthrinse over time using the previously developed in vitro model system. The microbiome composition was assessed with 16S rRNA gene sequencing and downstream bioinformatics analyses. Results The test mouthrinse displayed antimicrobial activity against known anaerobic bacterial species producing halitosis-related compounds such as Fusobacterium nucleatum, F. periodonticum, and Prevotella intermedia but not against other common oral microorganisms. In the multispecies, saliva-derived cultures, mouthrinse exposure decreased the relative abundance of the Fusobacterium and Prevotella genera while not affecting overall diversity. Conclusions The test mouthrinse had promising anti-halitosis characteristics at the microbiome level, as demonstrated by the reduction in the relative abundance of halitosis-associated taxa while maintaining microbial diversity.
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Affiliation(s)
| | | | - Xuesong He
- The Forsyth Institute, Cambridge, MA, USA
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25
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Huan H, Ren T, Xu L, Hu H, Liu C. Compositional distinction of gut microbiota between Han Chinese and Tibetan populations with liver cirrhosis. PeerJ 2021; 9:e12142. [PMID: 34616612 PMCID: PMC8449536 DOI: 10.7717/peerj.12142] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2020] [Accepted: 08/19/2021] [Indexed: 01/30/2023] Open
Abstract
BACKGROUND Liver cirrhosis (LC) is caused by numerous chronic liver diseases and its complications are associated with qualitative and quantitative alterations of the gut microbiota. Previous studies have revealed the characteristics of gut microbiota in Han Chinese patients with LC and different compositions of gut microbiota were reported between the Tibetan and Han Chinese populations. This study was designed to evaluate the unique features of the gut microbiota of Tibetans and compare the differences of gut microbiota between Tibetan and Han Chinese patients with LC. METHODS Thirty-six patients with liver cirrhosis and nineteen healthy volunteers, from both Tibetan and Han Chinese populations, were enrolled and fecal samples were collected for 16S rRNA gene sequencing analyses. RESULTS Significant differences were found in the gut microbiota of healthy volunteers and between Tibetan and Han Chinese patients with LC. In the Han Chinese patients with cirrhosis (HLC) group the relative abundances of the phylum Bacteroidetes was significantly reduced (P < 0.001), whereas in the Tibetan patients with cirrhosis (TLC) group Firmicutes and Actinobacteria were highly enriched (P = 0.01 and 0.03, respectively). At the genus level, the relative abundances of Anaerostipes (P < 0.001), Bifidobacterium (P = 0.03), and Blautia (P = 0.004) were prevalent, while Alloprevotella, Dorea, Prevotella_2, Prevotella_7 and Prevotella_9 were decreased in the TLC group compared to the HLC group (P < 0.01). CONCLUSION Our findings showed how the intestinal bacterial community shifted in Tibetan patients with cirrhosis.
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Affiliation(s)
- Hui Huan
- Hospital of Chengdu Office of People’s Government of Tibetan Autonomous Region, Chengdu, China
| | - Tao Ren
- Hospital of Chengdu Office of People’s Government of Tibetan Autonomous Region, Chengdu, China
| | - Li Xu
- Hospital of Chengdu Office of People’s Government of Tibetan Autonomous Region, Chengdu, China
| | - Hong Hu
- Hospital of Chengdu Office of People’s Government of Tibetan Autonomous Region, Chengdu, China
| | - Chao Liu
- Hospital of Chengdu Office of People’s Government of Tibetan Autonomous Region, Chengdu, China
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26
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Suzuki N, Nakano Y, Yoneda M, Hirofuji T, Hanioka T. The effects of cigarette smoking on the salivary and tongue microbiome. Clin Exp Dent Res 2021; 8:449-456. [PMID: 34505401 PMCID: PMC8874080 DOI: 10.1002/cre2.489] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2021] [Revised: 08/10/2021] [Accepted: 08/23/2021] [Indexed: 12/02/2022] Open
Abstract
Objectives It has been suggested that smoking affects the oral microbiome, but its effects on sites other than the subgingival microbiome remain unclear. This study investigated the composition of the salivary and tongue bacterial communities of smokers and nonsmokers in periodontally healthy adults. Methods The study population included 50 healthy adults. The bacterial composition of resting saliva and the tongue coating was identified through barcoded pyrosequencing analysis of the 16S rRNA gene. The Brinkman index (BI) was used to calculate lifetime exposure to smoking. The richness and diversity of the microbiome were evaluated using the t‐test. Differences in the proportions of bacterial genera between smokers and nonsmokers were evaluated using the Mann–Whitney U test. The quantitative relationship between the proportions of genera and the BI was evaluated using Pearson's correlation analysis. Results The richness and diversity of the oral microbiome differed significantly between saliva and the tongue but not between smokers and nonsmokers. The saliva samples from smokers were enriched with the genera Treponema and Selenomonas. The tongue samples from smokers were enriched with the genera Dialister and Atopobium. The genus Cardiobacterium in saliva, and the genus Granulicatella on the tongue, were negatively correlated with BI values. On the other hand, the genera Treponema, Oribacterium, Dialister, Filifactor, Veillonella, and Selenomonas in saliva and Dialister, Bifidobacterium, Megasphaera, Mitsuokella, and Cryptobacterium on the tongue were positively correlated with BI values. Conclusions The saliva and tongue microbial profiles of smokers and nonsmokers differed in periodontally healthy adults. The genera associated with periodontitis and oral malodor accounted for high proportions in saliva and on the tongue of smokers without periodontitis and were positively correlated with lifetime exposure to smoking. The tongue might be a reservoir of pathogens associated with oral disease in smokers.
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Affiliation(s)
- Nao Suzuki
- Department of Preventive and Public Health Dentistry, Fukuoka Dental College, Fukuoka, Japan.,Oral Medicine Research Center, Fukuoka Dental College, Fukuoka, Japan
| | - Yoshio Nakano
- Department of Chemistry, Nihon University School of Dentistry, Tokyo, Japan
| | - Masahiro Yoneda
- Department of General Dentistry, Fukuoka Dental College, Fukuoka, Japan
| | - Takao Hirofuji
- Department of General Dentistry, Fukuoka Dental College, Fukuoka, Japan
| | - Takashi Hanioka
- Department of Preventive and Public Health Dentistry, Fukuoka Dental College, Fukuoka, Japan
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Stephen AS, Dhadwal N, Nagala V, Gonzales-Marin C, Gillam DG, Bradshaw DJ, Burnett GR, Allaker RP. Interdental and subgingival microbiota may affect the tongue microbial ecology and oral malodour in health, gingivitis and periodontitis. J Periodontal Res 2021; 56:1174-1184. [PMID: 34486723 DOI: 10.1111/jre.12931] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2021] [Accepted: 08/26/2021] [Indexed: 01/02/2023]
Abstract
BACKGROUND AND OBJECTIVE Oral malodour is often observed in gingivitis and chronic periodontitis patients, and the tongue microbiota is thought to play a major role in malodorous gas production, including volatile sulphur compounds (VSCs) such as hydrogen sulphide (H2 S) and methanethiol (CH3 SH). This study aimed to examine the link between the presence of VSCs in mouth air (as a marker of oral malodour) and the oral bacterial ecology in the tongue and periodontal niches of healthy, gingivitis and periodontitis patients. METHODS Participants were clinically assessed using plaque index, bleeding on probing (BOP) and periodontal probing depths, and VSC concentrations in their oral cavity measured using a portable gas chromatograph. Tongue scrapings, subgingival and interdental plaque were collected from healthy individuals (n = 22), and those with gingivitis (n = 14) or chronic periodontitis (n = 15). The bacterial 16S rRNA gene region V3-V4 in these samples was sequenced, and the sequences were analysed using the minimum entropy decomposition pipeline. RESULTS Elevated VSC concentrations and CH3 SH:H2 S were observed in periodontitis compared with health. Significant ecological differences were observed in the tongue microbiota of healthy subjects with high plaque scores compared to low plaque scores, suggesting a possible connection between the microbiota of the tongue and the periodontium and that key dysbiotic changes may be initiated in the clinically healthy individuals who have higher dental plaque accumulation. Greater subgingival bacterial diversity was positively associated with H2 S in mouth air. Periodontopathic bacteria known to be prolific VSC producers increased in abundance on the tongue associated with increased bleeding on probing (BOP) and total percentage of periodontal pockets >6 mm, supporting the suggestion that the tongue may become a reservoir for periodontopathogens. CONCLUSION This study highlights the importance of the periodontal microbiota in malodour and has detected dysbiotic changes in the tongue microbiota in periodontitis.
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Affiliation(s)
- Abish S Stephen
- Centre for Oral Immunobiology and Regenerative Medicine, Institute of Dentistry, Queen Mary University of London, London, UK
| | - Narinder Dhadwal
- Adult Oral Health Centre, Queen Mary's School of Medicine & Dentistry, Institute of Dentistry, London, UK
| | - Vamshidhar Nagala
- Adult Oral Health Centre, Queen Mary's School of Medicine & Dentistry, Institute of Dentistry, London, UK
| | - Cecilia Gonzales-Marin
- Adult Oral Health Centre, Queen Mary's School of Medicine & Dentistry, Institute of Dentistry, London, UK
| | - David G Gillam
- Adult Oral Health Centre, Queen Mary's School of Medicine & Dentistry, Institute of Dentistry, London, UK
| | | | | | - Robert P Allaker
- Centre for Oral Immunobiology and Regenerative Medicine, Institute of Dentistry, Queen Mary University of London, London, UK
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Jo JK, Seo SH, Park SE, Kim HW, Kim EJ, Na CS, Cho KM, Kwon SJ, Moon YH, Son HS. Identification of Salivary Microorganisms and Metabolites Associated with Halitosis. Metabolites 2021; 11:metabo11060362. [PMID: 34200451 PMCID: PMC8226648 DOI: 10.3390/metabo11060362] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2021] [Revised: 05/27/2021] [Accepted: 06/03/2021] [Indexed: 02/05/2023] Open
Abstract
Halitosis is mainly caused by the action of oral microbes. The purpose of this study was to investigate the differences in salivary microbes and metabolites between subjects with and without halitosis. Of the 52 participants, 22 were classified into the halitosis group by the volatile sulfur compound analysis on breath samples. The 16S rRNA gene amplicon sequencing and metabolomics approaches were used to investigate the difference in microbes and metabolites in saliva of the control and halitosis groups. The profiles of microbiota and metabolites were relatively different between the halitosis and control groups. The relative abundances of Prevotella, Alloprevotella, and Megasphaera were significantly higher in the halitosis group. In contrast, the relative abundances of Streptococcus, Rothia, and Haemophilus were considerably higher in the control group. The levels of 5-aminovaleric acid and n-acetylornithine were significantly higher in the halitosis group. The correlation between identified metabolites and microbiota reveals that Alloprevotella and Prevotella might be related to the cadaverine and putrescine pathways that cause halitosis. This study could provide insight into the mechanisms of halitosis.
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Affiliation(s)
- Jae-kwon Jo
- Department of Biotechnology, College of Life Sciences and Biotechnology, Korea University, Seoul 02841, Korea; (J.-k.J.); (S.-E.P.); (H.-W.K.)
| | | | - Seong-Eun Park
- Department of Biotechnology, College of Life Sciences and Biotechnology, Korea University, Seoul 02841, Korea; (J.-k.J.); (S.-E.P.); (H.-W.K.)
| | - Hyun-Woo Kim
- Department of Biotechnology, College of Life Sciences and Biotechnology, Korea University, Seoul 02841, Korea; (J.-k.J.); (S.-E.P.); (H.-W.K.)
| | - Eun-Ju Kim
- Department of Korean Medicine, Dongshin University, Naju 58245, Korea; (E.-J.K.); (C.-S.N.)
| | - Chang-Su Na
- Department of Korean Medicine, Dongshin University, Naju 58245, Korea; (E.-J.K.); (C.-S.N.)
| | - Kwang-Moon Cho
- AccuGene Inc., Incheon 22006, Korea; (K.-M.C.); (S.-J.K.)
| | - Sun-Jae Kwon
- AccuGene Inc., Incheon 22006, Korea; (K.-M.C.); (S.-J.K.)
| | - Young-Ho Moon
- Naju Korean Medical Hospital, Dongshin University, Naju 58326, Korea
- Correspondence: (Y.-H.M.); (H.-S.S.); Tel.: +82-61-338-7812 (Y.-H.M.); +82-2-3290-3053 (H.-S.S.)
| | - Hong-Seok Son
- Department of Biotechnology, College of Life Sciences and Biotechnology, Korea University, Seoul 02841, Korea; (J.-k.J.); (S.-E.P.); (H.-W.K.)
- Correspondence: (Y.-H.M.); (H.-S.S.); Tel.: +82-61-338-7812 (Y.-H.M.); +82-2-3290-3053 (H.-S.S.)
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da Mota ACC, Gonçalves MLL, Horliana ACRT, Deana AM, de Souza Cavalcante LA, Gomes AO, Mayer MPA, Suguimoto ESA, Fernandes KPS, Mesquita-Ferrari RA, Prates RA, Motta LJ, Bussadori SK. Effect of antimicrobial photodynamic therapy with red led and methylene blue on the reduction of halitosis: controlled microbiological clinical trial. Lasers Med Sci 2021; 37:877-886. [PMID: 33987732 DOI: 10.1007/s10103-021-03325-x] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2020] [Accepted: 04/20/2021] [Indexed: 10/21/2022]
Abstract
To determine the effect of antimicrobial photodynamic therapy (aPDT) using a red light-emitting diode (LED) on the reduction of halitosis and microbiological levels in the tongue coating immediately after irradiation, 7, 14, and 30 days after treatment. Forty-five young adults diagnosed with halitosis were allocated to three groups: G1, aPDT with 0.005% methylene blue and red LED (660 nm, four irradiation points, 90 s per point, power of 400 mW, 36 J per point, radiant exposure of 95 J/cm2, continuous wave); G2, tongue scraping; and G3, tongue scraping and aPDT. Gas chromatography was performed before and immediately after treatment, as well as at the different follow-up times. Microbiological samples were collected at the same times from the dorsum of the tongue, and bacteria were quantified in the samples using real-time PCRq. The Wilcoxon test was used for the intragroup analyses, and the Kruskal-Wallis test was used for the intergroup analyses. In the intragroup analyses, differences were found before and immediately after treatment in all groups (p < 0.05). The effect was maintained after 7 days only in the tongue scraping group (p < 0.05). In the intergroup analysis, no statistically significant differences were found among the groups (p > 0.05). For the microbiological analyses, no statistically significant differences were found in the groups/bacteria that were analyzed (p > 0.05). aPDT using a red LED and 0.005% methylene blue caused an immediate reduction in halitosis, but the effect was not maintained after 7, 14, or 30 days. No reduction occurred in the number of bacteria investigated or the quantification of universal 16S rRNA. ClinicalTrials.gov Identifier: NCT03656419.
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Affiliation(s)
- Ana Carolina Costa da Mota
- Postgraduation Program in Biophotonics Applied to Health Sciences, Universidade Nove de Julho, Vergueiro Street, 235/249, Liberdade, São Paulo, SP, ZIP 01504-001, Brazil
| | - Marcela Leticia Leal Gonçalves
- Postgraduation Program in Biophotonics Applied to Health Sciences, Universidade Nove de Julho, Vergueiro Street, 235/249, Liberdade, São Paulo, SP, ZIP 01504-001, Brazil.,Dentistry College, Universidade Metropolitana de Santos, Conselheiro Nébias Avenue, Encruzilhada, Santos, SP, ZIP 11045-002, Brazil.,Postgraduation Program in Health and Environment, Universidade Metropolitana de Santos,, Santos, SP, Brazil
| | - Anna Carolina Ratto Tempestini Horliana
- Postgraduation Program in Biophotonics Applied to Health Sciences, Universidade Nove de Julho, Vergueiro Street, 235/249, Liberdade, São Paulo, SP, ZIP 01504-001, Brazil
| | - Alessandro Melo Deana
- Postgraduation Program in Biophotonics Applied to Health Sciences, Universidade Nove de Julho, Vergueiro Street, 235/249, Liberdade, São Paulo, SP, ZIP 01504-001, Brazil
| | - Lisyanne Araújo de Souza Cavalcante
- Postgraduation Program in Biophotonics Applied to Health Sciences, Universidade Nove de Julho, Vergueiro Street, 235/249, Liberdade, São Paulo, SP, ZIP 01504-001, Brazil
| | - Andréa Oliver Gomes
- Postgraduation Program in Rehabilitation Sciences, Universidade Nove de Julho, Vergueiro Street, 235/249, Liberdade, São Paulo, SP, ZIP 01504-001, Brazil
| | | | | | - Kristianne Porta Santos Fernandes
- Postgraduation Program in Biophotonics Applied to Health Sciences, Universidade Nove de Julho, Vergueiro Street, 235/249, Liberdade, São Paulo, SP, ZIP 01504-001, Brazil
| | - Raquel Agnelli Mesquita-Ferrari
- Postgraduation Program in Biophotonics Applied to Health Sciences, Universidade Nove de Julho, Vergueiro Street, 235/249, Liberdade, São Paulo, SP, ZIP 01504-001, Brazil
| | - Renato Araújo Prates
- Postgraduation Program in Biophotonics Applied to Health Sciences, Universidade Nove de Julho, Vergueiro Street, 235/249, Liberdade, São Paulo, SP, ZIP 01504-001, Brazil
| | - Lara Jansiski Motta
- Postgraduation Program in Biophotonics Applied to Health Sciences, Universidade Nove de Julho, Vergueiro Street, 235/249, Liberdade, São Paulo, SP, ZIP 01504-001, Brazil
| | - Sandra Kalil Bussadori
- Postgraduation Program in Biophotonics Applied to Health Sciences, Universidade Nove de Julho, Vergueiro Street, 235/249, Liberdade, São Paulo, SP, ZIP 01504-001, Brazil. .,Dentistry College, Universidade Metropolitana de Santos, Conselheiro Nébias Avenue, Encruzilhada, Santos, SP, ZIP 11045-002, Brazil. .,Postgraduation Program in Rehabilitation Sciences, Universidade Nove de Julho, Vergueiro Street, 235/249, Liberdade, São Paulo, SP, ZIP 01504-001, Brazil.
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Foo LH, Balan P, Pang LM, Laine ML, Seneviratne CJ. Role of the oral microbiome, metabolic pathways, and novel diagnostic tools in intra-oral halitosis: a comprehensive update. Crit Rev Microbiol 2021; 47:359-375. [PMID: 33653206 DOI: 10.1080/1040841x.2021.1888867] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Halitosis or oral malodor is one of the most common reasons for the patients' visit to the dental clinic, ranking behind only dental caries and periodontitis. In the present times, where social and professional communications are becoming unavoidable, halitosis has become a concern of growing importance. Oral malodor mostly develops due to the putrefaction of substrates by the indigenous bacterial populations. Although culture-based studies have provided adequate information on halitosis, the high throughput omics technologies have amplified the resolution at which oral microbial community can be examined and has led to the detection of a broader range of taxa associated with intra-oral halitosis (IOH). These microorganisms are regulated by the interactions of their ecological processes. Thus to develop effective treatment strategies, it is important to understand the microbial basis of halitosis. In the current review, we provide an update on IOH in context to the role of the oral microbiome, metabolic pathways involved, and novel diagnostic tools, including breathomics. Understanding oral microbiota associated with halitosis from a broader ecological perspective can provide novel insights into one's oral and systemic health. Such information can pave the way for the emergence of diagnostic tools that can revolutionize the early detection of halitosis and various associated medical conditions.
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Affiliation(s)
- Lean Heong Foo
- Department of Restorative Dentistry, Periodontic Unit, National Dental Centre Singapore, Singapore, Singapore.,Oral Health ACP, Duke NUS Medical School, Singapore, Singapore
| | - Preethi Balan
- Oral Health ACP, Duke NUS Medical School, Singapore, Singapore.,Singapore Oral Microbiomics Initiative (SOMI), National Dental Research Institute Singapore (NDRIS), National Dental Centre Singapore, Singapore, Singapore
| | - Li Mei Pang
- Singapore Oral Microbiomics Initiative (SOMI), National Dental Research Institute Singapore (NDRIS), National Dental Centre Singapore, Singapore, Singapore
| | - Marja L Laine
- Department of Periodontology, Academic Centre for Dentistry Amsterdam (ACTA), University of Amsterdam and VU University, Amsterdam, The Netherlands
| | - Chaminda Jayampath Seneviratne
- Oral Health ACP, Duke NUS Medical School, Singapore, Singapore.,Singapore Oral Microbiomics Initiative (SOMI), National Dental Research Institute Singapore (NDRIS), National Dental Centre Singapore, Singapore, Singapore
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31
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Andrews BT, Das P, Denzer W, Ritchie GA, Peverall R, Hamade AM, Hancock G. Breath testing for intra-abdominal infection: appendicitis, a preliminary study. J Breath Res 2020; 15:016002. [PMID: 33089830 DOI: 10.1088/1752-7163/abba88] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
In the current pilot study we aimed to determine whether breath analysis could be used to help recognise intra-abdominal infection, using acute appendicitis as an exemplar condition. Our study included 53 patients (aged 18-88 years) divided into three groups: appendix group, 26 (13 male) patients suffering from acute appendicitis; control group 20 (seven male) patients undergoing elective abdominal surgery; normal group, seven patients who were clinically diagnosed with appendicitis, but whose appendix was normal on histological examination. Samples of breath were analysed using ion molecule reaction mass spectroscopy measuring the concentration of volatile compounds (VCs) with molecular masses 27-123. Intraperitoneal gas samples were collected from a subset of 23 patients (nine diagnosed with acute appendicitis). Statistically significant differences in the concentration of VCs in breath were found between the three groups. Acetone, isopropanol, propanol, butyric acid, and further unassigned VCs with molecular mass/charge ratio (m/z) 56, 61 and 87 were all identified with significant endogenous contributions. Principle component analysis was able to separate the control and appendicitis groups for seven variables: m/z = 56, 58, 59, 60, 61, 87 and 88. Comparing breath and intraperitoneal samples showed significant relationships for acetone and the VC with m/z = 61. Our data suggest that it may be possible to help diagnose acute appendicitis by breath analysis; however, factors such as length of starvation remain to be properly accounted for and the management or mitigation of background levels needs to be properly addressed, and larger studies relating breath VCs to the causative organisms may help to highlight the relative importance of individual VCs.
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Affiliation(s)
- B T Andrews
- Department of Surgery, Medway Maritime Hospital, Gillingham, United Kingdom
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Zhang Y, Zhu C, Feng X, Chen X. Microbiome variations in preschool children with halitosis. Oral Dis 2020; 27:1059-1068. [PMID: 32790926 DOI: 10.1111/odi.13603] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2020] [Revised: 08/03/2020] [Accepted: 08/04/2020] [Indexed: 11/30/2022]
Abstract
OBJECTIVE To assess the bacterial characteristics associated with intra-oral halitosis among Chinese preschool children. METHODS An epidemiological study was conducted among 273 preschool children (aged 3-4 years) in Shanghai, China, followed by the collection of 16 samples from the tongue coating of caries-free healthy and halitosis participants. The characterization of associated microbial communities was performed using 16S rRNA gene sequencing on the MiSeq. RESULTS Halitosis was observed in 13.2% of the preschool children. No significant difference in terms of microbial diversity (p > .05) was detected in the control and halitosis groups. The dominant bacterial genera observed in both groups included Prevotella, Veillonella, Streptococcus, Neisseria, Actinomyces, Haemophilus, and Leptotrichia. The relative proportions of thirteen species (including Leptotrichia sp. HMT_417, Prevotella Pallens, and Alloprevotella rava) were significantly higher in the halitosis group compared with the control group, whereas the distribution of seventeen species from genera Streptococcus, Gemella, and Kingella showed a higher abundance in the control group. Further investigation of interactions among species demonstrated obvious differences in two groups, indicating that various microorganisms interact to produce halitosis in preschool children. CONCLUSIONS Overall, halitosis is associated with multi-microbial mutual interactions. The oral flora microorganisms may exert potentiating or inhibiting effects on each other.
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Affiliation(s)
- Yu Zhang
- Department of Preventive Dentistry, Shanghai Ninth People's Hospital, College of Stomatology, Shanghai Jiao Tong University School of Medicine, Shanghai, China.,National Clinical Research Center for Oral Diseases, Shanghai, China.,Shanghai Key Laboratory of Stomatology &, Shanghai Research Institute of Stomatology, Shanghai, China
| | - Ce Zhu
- Department of Preventive Dentistry, Shanghai Ninth People's Hospital, College of Stomatology, Shanghai Jiao Tong University School of Medicine, Shanghai, China.,National Clinical Research Center for Oral Diseases, Shanghai, China.,Shanghai Key Laboratory of Stomatology &, Shanghai Research Institute of Stomatology, Shanghai, China
| | - Xiping Feng
- Department of Preventive Dentistry, Shanghai Ninth People's Hospital, College of Stomatology, Shanghai Jiao Tong University School of Medicine, Shanghai, China.,National Clinical Research Center for Oral Diseases, Shanghai, China.,Shanghai Key Laboratory of Stomatology &, Shanghai Research Institute of Stomatology, Shanghai, China
| | - Xi Chen
- Department of Preventive Dentistry, Shanghai Ninth People's Hospital, College of Stomatology, Shanghai Jiao Tong University School of Medicine, Shanghai, China.,National Clinical Research Center for Oral Diseases, Shanghai, China.,Shanghai Key Laboratory of Stomatology &, Shanghai Research Institute of Stomatology, Shanghai, China
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Hampelska K, Jaworska MM, Babalska ZŁ, Karpiński TM. The Role of Oral Microbiota in Intra-Oral Halitosis. J Clin Med 2020; 9:E2484. [PMID: 32748883 PMCID: PMC7465478 DOI: 10.3390/jcm9082484] [Citation(s) in RCA: 68] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2020] [Revised: 07/30/2020] [Accepted: 07/31/2020] [Indexed: 12/18/2022] Open
Abstract
Halitosis is a common ailment concerning 15% to 60% of the human population. Halitosis can be divided into extra-oral halitosis (EOH) and intra-oral halitosis (IOH). The IOH is formed by volatile compounds, which are produced mainly by anaerobic bacteria. To these odorous substances belong volatile sulfur compounds (VSCs), aromatic compounds, amines, short-chain fatty or organic acids, alcohols, aliphatic compounds, aldehydes, and ketones. The most important VSCs are hydrogen sulfide, dimethyl sulfide, dimethyl disulfide, and methyl mercaptan. VSCs can be toxic for human cells even at low concentrations. The oral bacteria most related to halitosis are Actinomyces spp., Bacteroides spp., Dialister spp., Eubacterium spp., Fusobacterium spp., Leptotrichia spp., Peptostreptococcus spp., Porphyromonas spp., Prevotella spp., Selenomonas spp., Solobacterium spp., Tannerella forsythia, and Veillonella spp. Most bacteria that cause halitosis are responsible for periodontitis, but they can also affect the development of oral and digestive tract cancers. Malodorous agents responsible for carcinogenesis are hydrogen sulfide and acetaldehyde.
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Affiliation(s)
- Katarzyna Hampelska
- Department of Genetics and Pharmaceutical Microbiology, Poznań University of Medical Sciences, Święcickiego 4, 60-781 Poznań, Poland; (K.H.); (M.M.J.)
- Central Microbiology Laboratory, H. Święcicki Clinical Hospital, Poznań University of Medical Sciences, Przybyszewskiego 49, 60-355 Poznań, Poland
| | - Marcelina Maria Jaworska
- Department of Genetics and Pharmaceutical Microbiology, Poznań University of Medical Sciences, Święcickiego 4, 60-781 Poznań, Poland; (K.H.); (M.M.J.)
| | - Zuzanna Łucja Babalska
- Chair and Department of Medical Microbiology, Poznań University of Medical Sciences, Wieniawskiego 3, 61-712 Poznań, Poland;
| | - Tomasz M. Karpiński
- Chair and Department of Medical Microbiology, Poznań University of Medical Sciences, Wieniawskiego 3, 61-712 Poznań, Poland;
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Scheelings TF, Moore RJ, Van TTH, Klaassen M, Reina RD. Microbial symbiosis and coevolution of an entire clade of ancient vertebrates: the gut microbiota of sea turtles and its relationship to their phylogenetic history. Anim Microbiome 2020; 2:17. [PMID: 33499954 PMCID: PMC7807503 DOI: 10.1186/s42523-020-00034-8] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2020] [Accepted: 04/22/2020] [Indexed: 02/07/2023] Open
Abstract
Background The microbiota plays a critical role in host homeostasis and has been shown to be a major driving force in host evolution. However, our understanding of these important relationships is hampered by a lack of data for many species, and by significant gaps in sampling of the evolutionary tree. In this investigation we improve our understanding of the host-microbiome relationship by obtaining samples from all seven extant species of sea turtle, and correlate microbial compositions with host evolutionary history. Results Our analysis shows that the predominate phyla in the microbiota of nesting sea turtles was Proteobacteria. We also demonstrate a strong relationship between the bacterial phyla SR1 and sea turtle phylogeny, and that sea turtle microbiotas have changed very slowly over time in accordance with their similarly slow phenotypic changes. Conclusions This is one of the most comprehensive microbiota studies to have been performed in a single clade of animals and further improves our knowledge of how microbial populations have influenced vertebrate evolution.
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Affiliation(s)
| | - Robert J Moore
- RMIT University School of Science, Bundoora West Campus, Plenty Rd, Bundoora, Victoria, 3083, Australia
| | - Thi Thu Hao Van
- RMIT University School of Science, Bundoora West Campus, Plenty Rd, Bundoora, Victoria, 3083, Australia
| | - Marcel Klaassen
- Centre for Integrative Ecology, Deakin University, Waurn Ponds, Victoria, 3216, Australia
| | - Richard D Reina
- School of Biological Sciences, Monash University, Wellington Rd, Clayton, Victoria, 3800, Australia
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Microbiota and Malodor-Etiology and Management. Int J Mol Sci 2020; 21:ijms21082886. [PMID: 32326126 PMCID: PMC7215946 DOI: 10.3390/ijms21082886] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2020] [Revised: 04/14/2020] [Accepted: 04/15/2020] [Indexed: 02/06/2023] Open
Abstract
Accumulating evidence indicates that microbiota plays a critical role in physiological processes in humans. However, it might also contribute to body malodor by producing numerous odorous molecules such as ammonia, volatile sulfur compounds or trimethylamine. Although malodor is commonly overlooked by physicians, it constitutes a major problem for many otherwise healthy people. Thus, this review aims to investigate most common causes of malodor and describe potential therapeutic options. We searched PUBMED and Google Scholar databases to identify the clinical and pre-clinical studies on bad body smell, malodor, halitosis and microbiota. Unpleasant smell might originate from the mouth, skin, urine or reproductive fluids and is usually caused by odorants that are produced by resident bacterial flora. The accumulation of odorous compounds might result from diet, specific composition of microbiota, as well as compromised function of the liver, intestines and kidneys. Evidence-based guidelines for management of body malodor are lacking and no universal treatment exists. However, the alleviation of the symptoms may be achieved by controlling the diet and physical elimination of bacteria and/or accumulated odorants.
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Comparison of oral microbiome profiles in stimulated and unstimulated saliva, tongue, and mouth-rinsed water. Sci Rep 2019; 9:16124. [PMID: 31695050 PMCID: PMC6834574 DOI: 10.1038/s41598-019-52445-6] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2019] [Accepted: 10/12/2019] [Indexed: 01/07/2023] Open
Abstract
Epidemiological studies using saliva have revealed relationships between the oral microbiome and many oral and systemic diseases. However, when collecting from a large number of participants such as a large-scale cohort study, the time it takes to collect saliva can be a problem. Mouth-rinsed water, which is water that has been used to rinse the oral cavity, can be used as an alternative method for collecting saliva for oral microbiome analysis because it can be collected in a shorter time than saliva. The purpose of this study was to verify whether mouth-rinsed water is a suitable saliva substitute for analyzing the oral microbiome. We collected samples of mouth-rinsed water, stimulated saliva, unstimulated saliva, and tongue coating from 10 systemic healthy participants, and compared the microbial diversity and composition of the samples using next-generation sequencing of 16S rRNA-encoding genes. The results showed that the microbial diversity of mouth-rinsed water was similar to that of unstimulated and stimulated saliva, and significantly higher than that of tongue-coating samples. The microbial composition at the species level of mouth-rinsed water also showed a very high correlation with the composition of unstimulated and stimulated saliva. These results suggest that the mouth-rinsed water is a suitable collection method instead of saliva for oral microbiome analysis.
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Suzuki N, Yoneda M, Takeshita T, Hirofuji T, Hanioka T. Induction and inhibition of oral malodor. Mol Oral Microbiol 2019; 34:85-96. [PMID: 30927516 DOI: 10.1111/omi.12259] [Citation(s) in RCA: 39] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2019] [Revised: 03/14/2019] [Accepted: 03/27/2019] [Indexed: 02/04/2023]
Abstract
Volatile sulfur compounds (VSCs) such as hydrogen sulfide (H2 S) and methyl mercaptan (CH3 SH) are the main components of oral malodor, and are produced as the end products of the proteolytic processes of oral microorganisms. The main pathway of proteolysis is the metabolism of sulfur-containing amino acids by gram-negative anaerobic bacteria. Gram-positive bacteria may promote VSC production by gram-negative anaerobes by cleaving sugar chains from glycoproteins and thus providing proteins. A large variety of bacteria within the oral microbiota are thought to be involved in the complex phenomenon of halitosis. Oral microbiota associated with a lack of oral malodor, oral microbiota associated with severe and H2 S-dominant oral malodor, and oral microbiota associated with severe and CH3 SH-dominant oral malodor have been distinguished through molecular approaches using the 16S rRNA gene. Pathological halitosis may primarily be addressed through treatment of causative diseases. In all cases, plaque control is the basis of oral malodor control, and dentifrices, mouthwashes, and functional foods play a supplementary role in addition to brushing. Recently, the use of natural ingredients in products tends to be favored due to the increase in antibiotic-resistant strains and the side effects of some chemical ingredients. In addition, probiotics and vaccines are expected to offer new strategies for improving the oral conditions through mechanisms other than antibacterial agents.
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Affiliation(s)
- Nao Suzuki
- Department of Preventive and Public Health Dentistry, Fukuoka Dental College, Fukuoka, Japan
| | - Masahiro Yoneda
- Department of General Dentistry, Fukuoka Dental College, Fukuoka, Japan
| | - Toru Takeshita
- Section of Preventive and Public Health Dentistry, Division of Oral Health, Growth and Development, Faculty of Dental Science, Kyushu University, Fukuoka, Japan.,OBT Research Center, Faculty of Dental Science, Kyushu University, Fukuoka, Japan
| | - Takao Hirofuji
- Department of General Dentistry, Fukuoka Dental College, Fukuoka, Japan
| | - Takashi Hanioka
- Department of Preventive and Public Health Dentistry, Fukuoka Dental College, Fukuoka, Japan
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Abstract
Liver cancer is the sixth most common cancer worldwide, and the third most common cause of cancer-related death. Hepatocellular carcinoma (HCC), which accounts for more than 90% of primary liver cancers, is an important public health problem. In addition to cirrhosis caused by hepatitis B viral (HBV) or hepatitis C viral (HCV) infection, non-alcoholic fatty liver disease (NAFLD) is becoming a major risk factor for liver cancer because of the prevalence of obesity. Non-alcoholic steatohepatitis (NASH) will likely become the leading indication for liver transplantation in the future. It is well recognized that gut microbiota is a key environmental factor in the pathogenesis of liver disease and cancer. The interplay between gut microbiota and liver disease has been investigated in animal and clinical studies. In this article, we summarize the roles of gut microbiota in the development of liver disease as well as gut microbiota-targeted therapies.
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Affiliation(s)
- Lijun Wang
- Department of Medical Pathology and Laboratory Medicine, University of California, Davis, Sacramento, CA, USA,The College of Life Science, Yangtze University, Jingzhou, Hubei, China
| | - Yu-Jui Yvonne Wan
- Department of Medical Pathology and Laboratory Medicine, University of California, Davis, Sacramento, CA, USA,Corresponding author. Department of medical Pathology and Laboratory Medicine, University of California, Davis, Sacramento, CA, USA. (Y.-J.Y. Wan)
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Li Y, Liu Y, Psoter WJ, Nguyen OM, Bromage TG, Walters MA, Hu B, Rabieh S, Kumararaja FC. Assessment of the Silver Penetration and Distribution in Carious Lesions of Deciduous Teeth Treated with Silver Diamine Fluoride. Caries Res 2019; 53:431-440. [PMID: 30808824 DOI: 10.1159/000496210] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2018] [Accepted: 12/12/2018] [Indexed: 11/19/2022] Open
Abstract
The aim of this study was to determine the effects of 38% silver diamine fluoride (SDF) on carious lesions of human deciduous teeth. Ten extracted deciduous incisors with caries were collected and treated with SDF. After the treatment, the teeth were sectioned through the center of the carious lesion. The extent of sliver precipitation was examined using quantitative backscattered electron scanning electron microscopy (qBSE-SEM), energy-dispersive X-ray spectroscopy (EDX), and micro-computed tomography (micro-CT). The qBSE-SEM images revealed that the silver particles could penetrate through the pellicle complex, along with the rod sheaths into the demineralized enamel rods and the dentinal tubules, and form silver-enriched barriers surrounding the carious lesions at depths up to 2,490.2 μm (mean 744.7 ± 448.7 μm) within the dentinal tubules of the carious lesions, but less likely in the sound enamel. The EDX spectrum analysis revealed that carbon, oxygen, phosphorus, chlorine, silver, and calcium were the main elements detected in the lesions treated with SDF. Additionally, sodium, magnesium, aluminum, silicon, zinc, sulfur, and fluorine were detected as the minor elements within the SDF precipitation "zone." The micro-CT analysis further showed that in the deep cavitated lesions, the silver precipitation could be observed in the pulp chamber. These findings provide new evidence defining the SDF mode of action for arresting caries and suggest that the application of a highly concentrated SDF solution on deciduous teeth should be used with caution for various carious lesions.
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Affiliation(s)
- Yihong Li
- Department of Basic Science and Craniofacial Biology, New York University College of Dentistry, New York, New York, USA,
| | - Yingyi Liu
- Department of Basic Science and Craniofacial Biology, New York University College of Dentistry, New York, New York, USA.,Department of Cariology, Endodontology, and Operative Dentistry, Peking University School and Hospital of Stomatology, Beijing, China
| | - Walter J Psoter
- University of Rochester Medical Center School of Medicine and Dentistry, Rochester, New York, USA
| | - Olivia M Nguyen
- Department of Basic Science and Craniofacial Biology, New York University College of Dentistry, New York, New York, USA
| | - Timothy G Bromage
- Department of Biomaterials and Biomimetics, New York University College of Dentistry, New York, New York, USA
| | - Marc A Walters
- Department of Chemistry, New York University College of Arts and Science, New York, New York, USA
| | - Bin Hu
- Department of Biomaterials and Biomimetics, New York University College of Dentistry, New York, New York, USA
| | - Sasan Rabieh
- Department of Biomaterials and Biomimetics, New York University College of Dentistry, New York, New York, USA
| | - Fancy C Kumararaja
- Department of Basic Science and Craniofacial Biology, New York University College of Dentistry, New York, New York, USA
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40
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Cadena AM, Ma Y, Ding T, Bryant M, Maiello P, Geber A, Lin PL, Flynn JL, Ghedin E. Profiling the airway in the macaque model of tuberculosis reveals variable microbial dysbiosis and alteration of community structure. MICROBIOME 2018; 6:180. [PMID: 30301469 PMCID: PMC6178261 DOI: 10.1186/s40168-018-0560-y] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/23/2018] [Accepted: 09/20/2018] [Indexed: 05/04/2023]
Abstract
BACKGROUND The specific interactions of Mycobacterium tuberculosis (Mtb), the causative agent of tuberculosis (TB), and the lung microbiota in infection are entirely unexplored. Studies in cancer and other infectious diseases suggest that there are important exchanges occurring between host and microbiota that influence the immunological landscape. This can result in alterations in immune regulation and inflammation both locally and systemically. To assess whether Mtb infection modifies the lung microbiome, and identify changes in microbial abundance and diversity as a function of pulmonary inflammation, we compared infected and uninfected lung lobe washes collected serially from 26 macaques by bronchoalveolar lavage over the course of infection. RESULTS We found that Mtb induced an initial increase in lung microbial diversity at 1 month post infection that normalized by 5 months of infection across all macaques. Several core genera showed global shifts from baseline and throughout infection. Moreover, we identified several specific taxa normally associated with the oral microbiome that increased in relative abundance in the lung following Mtb infection, including SR1, Aggregatibacter, Leptotrichia, Prevotella, and Campylobacter. On an individual macaque level, we found significant heterogeneity in both the magnitude and duration of change within the lung microbial community that was unrelated to lung inflammation and lobe involvement as seen by positron emission tomography/computed tomography (PET/CT) imaging. By comparing microbial interaction networks pre- and post-infection using the predictive algorithm SPIEC-EASI, we observe that extra connections are gained by Actinomycetales, the order containing Mtb, in spite of an overall reduction in the number of interactions of the whole community post-infection, implicating Mtb-driven ecological reorganization within the lung. CONCLUSIONS This study is the first to probe the dynamic interplay between Mtb and host microbiota longitudinally and in the macaque lung. Our findings suggest that Mtb can alter the microbial landscape of infected lung lobes and that these interactions induce dysbiosis that can disrupt oral-airway boundaries, shift overall lung diversity, and modulate specific microbial relationships. We also provide evidence that this effect is heterogeneous across different macaques. Overall, however, the changes to the airway microbiota after Mtb infection were surprisingly modest, despite a range of Mtb-induced pulmonary inflammation in this cohort of macaques.
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Affiliation(s)
- Anthony M Cadena
- Department of Microbiology and Molecular Genetics, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
- Present address: Center for Virology and Vaccine Research, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, USA
| | - Yixuan Ma
- Center for Genomics and Systems Biology, Department of Biology, New York University, New York, USA
| | - Tao Ding
- Center for Genomics and Systems Biology, Department of Biology, New York University, New York, USA
| | - MacKenzie Bryant
- Department of Microbiology and Molecular Genetics, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
- Present address: Department of Pediatrics, University of California, San Diego School of Medicine, La Jolla, California, USA
| | - Pauline Maiello
- Department of Microbiology and Molecular Genetics, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
| | - Adam Geber
- Center for Genomics and Systems Biology, Department of Biology, New York University, New York, USA
| | - Philana Ling Lin
- Department of Pediatrics, Children's Hospital of Pittsburgh of University of Pittsburgh Medical Center, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
| | - JoAnne L Flynn
- Department of Microbiology and Molecular Genetics, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA.
| | - Elodie Ghedin
- Center for Genomics and Systems Biology, Department of Biology, New York University, New York, USA.
- College of Global Public Health, New York University, New York, NY, USA.
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Landry AP, Ballou DP, Banerjee R. Modulation of Catalytic Promiscuity during Hydrogen Sulfide Oxidation. ACS Chem Biol 2018; 13:1651-1658. [PMID: 29715001 DOI: 10.1021/acschembio.8b00258] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
The mitochondrial sulfide oxidation pathway prevents the toxic accumulation of hydrogen sulfide (H2S), a signaling molecule that is maintained at low steady-state concentrations. Sulfide quinone oxidoreductase (SQR), an inner mitochondrial membrane-anchored protein, catalyzes the first and committing step in this pathway, oxidizing H2S to persulfide. The catalytic cycle comprises sulfide addition to the active site cysteine disulfide in SQR followed by sulfur transfer to a small molecule acceptor, while a pair of electrons moves from sulfide, to FAD, to coenzyme Q. While its ability to oxidize H2S is well characterized, SQR exhibits a remarkable degree of substrate promiscuity in vitro that could undermine its canonical enzyme activity. To assess how its promiscuity might be contained in vivo, we have used spectroscopic and kinetic analyses to characterize the reactivity of alternate substrates with SQR embedded in nanodiscs ( ndSQR) versus detergent-solubilized enzyme ( sSQR). We find that the membrane environment of ndSQR suppresses the unwanted addition of GSH but enhances sulfite addition, which might become significant under pathological conditions characterized by elevated sulfite levels. We demonstrate that methanethiol, a toxic sulfur compound produced in significant quantities by colonic and oral microbiota, can add to the SQR cysteine disulfide and also serve as a sulfur acceptor, potentially interfering with sulfide oxidation when its concentrations are elevated. These studies demonstrate that the membrane environment and substrate availability combine to minimize promiscuous reactions that would otherwise disrupt sulfide homeostasis.
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Affiliation(s)
- Aaron P. Landry
- Department of Biological Chemistry, University of Michigan Medical School, Ann Arbor, Michigan 48109, United States
| | - David P. Ballou
- Department of Biological Chemistry, University of Michigan Medical School, Ann Arbor, Michigan 48109, United States
| | - Ruma Banerjee
- Department of Biological Chemistry, University of Michigan Medical School, Ann Arbor, Michigan 48109, United States
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Suzuki N, Nakano Y, Watanabe T, Yoneda M, Hirofuji T, Hanioka T. Two mechanisms of oral malodor inhibition by zinc ions. J Appl Oral Sci 2018; 26:e20170161. [PMID: 29364345 PMCID: PMC5777415 DOI: 10.1590/1678-7757-2017-0161] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2017] [Revised: 06/24/2017] [Accepted: 07/01/2017] [Indexed: 12/05/2022] Open
Abstract
The aim of this study was to reveal the mechanisms by which zinc ions inhibit oral malodor. The direct binding of zinc ions to gaseous hydrogen sulfide (H2S) was assessed in comparison with other metal ions. Nine metal chlorides and six metal acetates were examined. To understand the strength of H2S volatilization inhibition, the minimum concentration needed to inhibit H2S volatilization was determined using serial dilution methods. Subsequently, the inhibitory activities of zinc ions on the growth of six oral bacterial strains related to volatile sulfur compound (VSC) production and three strains not related to VSC production were evaluated. Aqueous solutions of ZnCl2, CdCl2, CuCl2, (CH3COO)2Zn, (CH3COO)2Cd, (CH3COO)2Cu, and CH3COOAg inhibited H2S volatilization almost entirely. The strengths of H2S volatilization inhibition were in the order Ag+ > Cd2+ > Cu2+ > Zn2+. The effect of zinc ions on the growth of oral bacteria was strain-dependent. Fusobacterium nucleatum ATCC 25586 was the most sensitive, as it was suppressed by medium containing 0.001% zinc ions. Zinc ions have an inhibitory effect on oral malodor involving the two mechanisms of direct binding with gaseous H2S and suppressing the growth of VSC-producing oral bacteria.
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Affiliation(s)
- Nao Suzuki
- Fukuoka Dental College, Department of Preventive and Public Health Dentistry, Fukuoka, Japan
| | - Yoshio Nakano
- Nihon University, School of Dentistry, Department of Chemistry, Tokyo, Japan
| | - Takeshi Watanabe
- Fukuoka Dental College, Department of Preventive and Public Health Dentistry, Fukuoka, Japan
| | - Masahiro Yoneda
- Fukuoka Dental College, Department of General Dentistry, Fukuoka, Japan
| | - Takao Hirofuji
- Fukuoka Dental College, Department of General Dentistry, Fukuoka, Japan
| | - Takashi Hanioka
- Fukuoka Dental College, Department of Preventive and Public Health Dentistry, Fukuoka, Japan
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Luo JW, Lin CH, Zhu YB, Zheng XY, Wu YX, Chen WW, Yang X. Association of Tongue Bacterial Flora and Subtypes of Liver-Fire Hyperactivity Syndrome in Hypertensive Patients. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE : ECAM 2018; 2018:9536924. [PMID: 29541146 PMCID: PMC5818919 DOI: 10.1155/2018/9536924] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/10/2017] [Accepted: 12/04/2017] [Indexed: 12/18/2022]
Abstract
Structural changes in symbiotic human microorganisms can affect host phenotype. Liver-fire hyperactivity syndrome (LFHS) presents as bitter taste, halitosis, xerostomia, odontalgia, and other oral symptoms. LFHS is associated with hypertension (EH). In this study, tongue flora was analyzed to further understand the intrinsic relationship between tongue flora and LFHS. Samples of tongue coating, from 16 patients with EH-LFHS, 16 with EH-non-LFHS, and 16 controls, were obtained; then, 16S rRNA variable (V3-V4) regions were amplified and sequenced by MiSeq PE300 Sequencing. Tag clustering and Operational Taxonomic Units (OTUs) abundance analysis were used to compare the OTU sequence with the 16S database. The species were classified, and diversity and structure of the bacterial flora were compared between the three groups. Alpha diversity analysis, including Observed Species index and Chao index, indicated significantly higher richness of species in patients with EH-LFHS (p < 0.05). Higher phylogenetic diversity, in patients with EH-non-LFHS, indicates greater differences in evolutionary history than in patients with EH-LFHS. Streptococcus, Rothia, Neisseria, and Sphingomonas were the most prevalent in patients with EH-LFHS, differed from the other two groups. This indicates that richer bacterial diversity, and structure associated with EH-LFHS, may affect the occurrence, development, and outcome of hypertension and syndrome subtypes recognized by TCM.
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Affiliation(s)
- Jie-wei Luo
- Provincial Clinical Medical College, Fujian Medical University, Fuzhou 350001, China
- Department of Traditional Chinese Medicine, Fujian Provincial Hospital, Fuzhou 350001, China
| | - Cong-huai Lin
- Department of Traditional Chinese Medicine, Fujian Provincial Hospital, Fuzhou 350001, China
| | - Yao-bin Zhu
- Provincial Clinical Medical College, Fujian Medical University, Fuzhou 350001, China
- Department of Traditional Chinese Medicine, The First Affiliated Hospital, Fujian Medical University, Fuzhou 350005, China
| | - Xing-yu Zheng
- Provincial Clinical Medical College, Fujian Medical University, Fuzhou 350001, China
- Department of Traditional Chinese Medicine, Fujian Provincial Hospital, Fuzhou 350001, China
| | - Yong-xi Wu
- Provincial Clinical Medical College, Fujian Medical University, Fuzhou 350001, China
- Department of Traditional Chinese Medicine, Fujian Provincial Hospital, Fuzhou 350001, China
| | - Wei-wei Chen
- Department of Traditional Chinese Medicine, Fujian Provincial Hospital, Fuzhou 350001, China
| | - Xiao Yang
- Teaching and Research Office of Medical Cosmetology, Department of Management, Fujian Health College, Fuzhou 350101, China
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Sensitivity of salivary hydrogen sulfide to psychological stress and its association with exhaled nitric oxide and affect. Physiol Behav 2017; 179:99-104. [PMID: 28527680 DOI: 10.1016/j.physbeh.2017.05.023] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2017] [Revised: 04/28/2017] [Accepted: 05/17/2017] [Indexed: 12/12/2022]
Abstract
BACKGROUND Hydrogen sulfide (H2S) is the third gasotransmitter recently discovered after nitric oxide (NO) and carbon monoxide. Both NO and H2S are involved in multiple physiological functions. Whereas NO has been shown to vary with psychological stress, the influence of stress on H2S and the relationship between H2S and NO are unknown. We therefore examined levels of salivary H2S and NO in response to a stressful final academic exam period. METHODS Measurements of stress, negative affect, and fraction of exhaled NO (FENO), were obtained from students (N=16) and saliva was collected at three time points: low-stress period in the semester, early exam period, and late exam period. Saliva was immediately analyzed for H2S with the fluorescent probe Sulfidefluor-4. RESULTS H2S increased significantly during the early exam period and FENO decreased gradually towards the late exam period. H2S, FENO, negative affect, and stress ratings were positively associated with each other: as stress level and negative affect increased, values of H2S increased; in addition, as FENO levels decreased, H2S also decreased. Asthma status did not modify these associations. CONCLUSION Sustained academic stress increases H2S and these changes are correlated with NO and the experience of stress and negative affect. These findings motivate research with larger samples to further explore the interaction and function of H2S and FENO during psychological stress.
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Iwamura Y, Hayashi JI, Sato T, Sato S, Murakami T, Fujimura T, Sasaki Y, Okada K, Takahashi E, Kikuchi T, Aino M, Noguchi T, Shimazaki Y, Mitani A, Fukuda M. Assessment of oral malodor and tonsillar microbiota after gargling with benzethonium chloride. J Oral Sci 2017; 58:83-91. [PMID: 27021544 DOI: 10.2334/josnusd.58.83] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022]
Abstract
The oropharyngeal area can be a source of halitosis. However, the relationship between healthy tonsillar microbiota and halitosis is poorly understood. We conducted a pilot clinical study to clarify the effect of gargling with an antiseptic agent on tonsillar microbiota in patients with halitosis. Twenty-nine halitosis patients who did not have otolaryngologic disease or periodontitis were assigned randomly to one of three groups: benzethonium chloride (BZC) gargle; placebo gargle; no gargle. Concentrations of volatile sulfur compounds (VSCs) in mouth air, the organoleptic score (ORS) and tongue-coating score (TCS) were measured before and after testing. Tonsillar microbiota were assessed by detection of periodontal pathogens, and profiling with terminal-restriction fragment length polymorphism (T-RFLP) analysis and sequencing of 16SrRNA clone libraries for taxonomic assignment. Gargling with BZC reduced the concentrations of methyl mercaptan and hydrogen sulfide and the ORS, but did not affect the TCS or prevalence of periodontal pathogens. T-RFLP analyses and 16SrRNA clone sequencing showed a tendency for some candidate species to decrease in the test group. Although gargling of the oropharyngeal area with an antiseptic agent can reduce oral malodor, it appears that tonsillar microbiota are not influenced greatly. (J Oral Sci 58, 83-91, 2016).
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Affiliation(s)
- Yuki Iwamura
- Department of Periodontology, School of Dentistry, Aichi Gakuin University
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Ecology of the Oral Microbiome: Beyond Bacteria. Trends Microbiol 2017; 25:362-374. [PMID: 28089325 DOI: 10.1016/j.tim.2016.12.012] [Citation(s) in RCA: 193] [Impact Index Per Article: 27.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2016] [Revised: 12/13/2016] [Accepted: 12/16/2016] [Indexed: 01/08/2023]
Abstract
Although great strides have been made in understanding the complex bacterial community inhabiting the human oral cavity, for a variety of (mainly technical) reasons the ecological contributions of oral fungi, viruses, phages, and the candidate phyla radiation (CPR) group of ultrasmall bacteria have remained understudied. Several recent reports have illustrated the diversity and importance of these organisms in the oral cavity, while TM7x and Candida albicans have served as crucial paradigms for CPR species and oral fungi, respectively. A comprehensive understanding of the oral microbiota and its influence on host health and disease will require a holistic view that emphasizes interactions among different residents within the oral community, as well as their interaction with the host.
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Dysbiosis of small intestinal microbiota in liver cirrhosis and its association with etiology. Sci Rep 2016; 6:34055. [PMID: 27687977 PMCID: PMC5043180 DOI: 10.1038/srep34055] [Citation(s) in RCA: 136] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2016] [Accepted: 08/22/2016] [Indexed: 12/13/2022] Open
Abstract
Cirrhosis-associated duodenal dysbiosis is not yet clearly defined. In this research, duodenal mucosal microbiota was analyzed in 30 cirrhotic patients and 28 healthy controls using 16S rRNA gene pyrosequencing methods. The principal coordinate analysis revealed that cirrhotic patients were colonized by remarkable different duodenal mucosal microbiota in comparison with controls. At the genus level, Veillonella, Megasphaera, Dialister, Atopobium, and Prevotella were found overrepresented in cirrhotic duodenum. And the duodenal microbiota of healthy controls was enriched with Neisseria, Haemophilus, and SR1 genera incertae sedis. On the other hand, based on predicted metagenomes analyzed, gene pathways related to nutrient absorption (e.g. sugar and amino acid metabolism) were highly abundant in cirrhosis duodenal microbiota, and functional modules involved in bacterial proliferation and colonization (e.g. bacterial motility proteins and secretion system) were overrepresented in controls. When considering the etiology of cirrhosis, two operational taxonomic units (OTUs), OTU-23 (Neisseria) and OTU-36 (Gemella), were found discriminative between hepatitis-B-virus related cirrhosis and primary biliary cirrhosis. The results suggest that the structure of duodenal mucosa microbiota in cirrhotic patients is dramatically different from healthy controls. The duodenum dysbiosis might be related to alterations of oral microbiota and changes in duodenal micro-environment.
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Avincsal M, Altundag A, Dinc M, Cayonu M, Topak M, Kulekci M. Evaluation of halitosis using OralChroma™ in patients with allergic rhinitis. Eur Ann Otorhinolaryngol Head Neck Dis 2016; 133:243-6. [DOI: 10.1016/j.anorl.2015.08.042] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2015] [Revised: 08/06/2015] [Accepted: 08/10/2015] [Indexed: 11/27/2022]
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Aydin M, Özen ME, Evlice B, Ferguson M, Uzel İ. A new measurement protocol to differentiate sources of halitosis. Acta Odontol Scand 2016; 74:380-4. [PMID: 27167742 DOI: 10.3109/00016357.2016.1163732] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
OBJECTIVE Three sources of halitosis exist, potentially in any combination: mouth, nasal cavity or alveolar breath. There has been no universally accepted protocol which differentiates and quantifies each odour source separately. In this study a new gas measurement protocol is described and tested to determine whether each odour source can be separately detected without contamination. MATERIALS AND METHODS Ninety healthy volunteers were divided into three groups. Hydrogen sulphide (H2S), volatile organic compounds (VOCs) and hydrogen (H2) were artificially generated in the mouth, nose and pulmonary alveoli, respectively. VOC, ammonia (NH3), sulphur dioxide (SO2), H2S and H2 gas readings from mouth, nose and alveolar air were measured and compared. Measurements were taken before and during gas generation. RESULTS Contamination of nasal air (2.8%) and alveolar air (5.0%) by oral H2S; alveolar air (2.06%) and oral air (4%) by nasal organic gas; nasal air (18.43%) and oral air (9.42%) by alveolar H2 was calculated. CONCLUSION The results demonstrated that artificially generated oral H2S nasal VOC and alveolar H2 can be individually quantified. This gas measurement protocol can be used diagnostically or to gauge response to therapy in any medical or dental setting.
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Affiliation(s)
| | | | - Burcu Evlice
- Faculty of Dentistry, Department of Oral and Maxillofacial Radiology, Çukurova University, Adana, Türkiye
| | | | - İlter Uzel
- Emeritus Professor, Private practice, Mersin, Türkiye
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50
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Ren W, Xun Z, Wang Z, Zhang Q, Liu X, Zheng H, Zhang Q, Zhang Y, Zhang L, Wu C, Zheng S, Qin N, Ehrlich SD, Li Y, He X, Xu T, Chen T, Chen F. Tongue Coating and the Salivary Microbial Communities Vary in Children with Halitosis. Sci Rep 2016; 6:24481. [PMID: 27080513 PMCID: PMC4832241 DOI: 10.1038/srep24481] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2015] [Accepted: 03/30/2016] [Indexed: 12/20/2022] Open
Abstract
Halitosis is a common symptom mainly caused by microbial activities in the oral cavity. Here, we used 16S rRNA gene pyrosequencing and metagenomic sequencing to examine oral microbial compositions and their functional variations in children with halitosis. We found that the tongue coating of subjects with halitosis had greater bacterial richness than those of healthy subjects. The relative abundance and prevalence of Leptotrichia wadei and Peptostreptococcus stomatis were higher in tongue coating samples from children with halitosis than those from children without halitosis; Prevotella shahii had higher relative abundance and prevalence in saliva samples from children with halitosis. We present the first comprehensive evaluation of the co-occurrence networks of saliva and tongue coating communities under healthy and halitosis conditions, and investigated patterns of significant differences between these communities. Moreover, we observed that bacterial genes associated with responses to infectious diseases and terpenoid and polyketide metabolism were enriched in subjects with halitosis, but not in healthy subjects. Hydrogen sulphide (H2S)-related metabolic pathways suggested that there was higher microbial production and less usage of H2S in subjects with halitosis. Thus, the mechanism of halitosis was implied for the first time via metagenomic sequencing.
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Affiliation(s)
- Wen Ren
- Department of Preventive Dentistry, Peking University School and Hospital of Stomatology, Beijing, China
| | - Zhe Xun
- Department of Preventive Dentistry, Peking University School and Hospital of Stomatology, Beijing, China
| | - Zicheng Wang
- Bioinformatics Division, TNLIST and Department of Automation, Tsinghua University, Beijing, China
| | - Qun Zhang
- Department of Preventive Dentistry, Peking University School and Hospital of Stomatology, Beijing, China
| | - Xuenan Liu
- Department of Preventive Dentistry, Peking University School and Hospital of Stomatology, Beijing, China
| | - Hui Zheng
- Central Laboratory, Peking University School and Hospital of Stomatology, Beijing, China
| | - Qian Zhang
- Central Laboratory, Peking University School and Hospital of Stomatology, Beijing, China
| | - Yifei Zhang
- Central Laboratory, Peking University School and Hospital of Stomatology, Beijing, China
| | | | - Chunyan Wu
- Realbio Genomics Institute, Shanghai, China
| | - Shuguo Zheng
- Department of Preventive Dentistry, Peking University School and Hospital of Stomatology, Beijing, China
| | - Nan Qin
- State Key Laboratory for Diagnosis and Treatment of Infectious Disease, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, China
| | - S Dusko Ehrlich
- Metagenopolis, Institut National de la Recherche Agronomique, Jouy en Josas, France.,King's College London, Centre for Host-Microbiome Interactions, Dental Institute Central Office, Guy's Hospital, London Bridge, London, UK
| | - Yihong Li
- Department of Basic Science and Craniofacial Biology, New York University College of Dentistry, New York, USA
| | - Xuesong He
- School of Dentistry, University of California Los Angeles, Los Angeles, USA
| | - Tao Xu
- Department of Preventive Dentistry, Peking University School and Hospital of Stomatology, Beijing, China
| | - Ting Chen
- Bioinformatics Division, TNLIST and Department of Automation, Tsinghua University, Beijing, China.,Programs in Computational Biology and Bioinformatics, University of Southern California, Los Angeles, USA
| | - Feng Chen
- Central Laboratory, Peking University School and Hospital of Stomatology, Beijing, China
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