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Chattopadhyay S, Malayil L, Chopyk J, Smyth E, Kulkarni P, Raspanti G, Thomas SB, Sapkota A, Mongodin EF, Sapkota AR. Oral microbiome dysbiosis among cigarette smokers and smokeless tobacco users compared to non-users. Sci Rep 2024; 14:10394. [PMID: 38710815 DOI: 10.1038/s41598-024-60730-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2023] [Accepted: 04/26/2024] [Indexed: 05/08/2024] Open
Abstract
Tobacco use significantly influences the oral microbiome. However, less is known about how different tobacco products specifically impact the oral microbiome over time. To address this knowledge gap, we characterized the oral microbiome of cigarette users, smokeless tobacco users, and non-users over 4 months (four time points). Buccal swab and saliva samples (n = 611) were collected from 85 participants. DNA was extracted from all samples and sequencing was carried out on an Illumina MiSeq, targeting the V3-V4 region of the 16S rRNA gene. Cigarette and smokeless tobacco users had more diverse oral bacterial communities, including a higher relative abundance of Firmicutes and a lower relative abundance of Proteobacteria, when compared to non-users. Non-users had a higher relative abundance of Actinomyces, Granulicatella, Haemophilus, Neisseria, Oribacterium, Prevotella, Pseudomonas, Rothia, and Veillonella in buccal swab samples, compared to tobacco users. While the most abundant bacterial genera were relatively constant over time, some species demonstrated significant shifts in relative abundance between the first and last time points. In addition, some opportunistic pathogens were detected among tobacco users including Neisseria subflava, Bulleidia moorei and Porphyromonas endodontalis. Overall, our results provide a more holistic understanding of the structure of oral bacterial communities in tobacco users compared to non-users.
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Affiliation(s)
- Suhana Chattopadhyay
- Department of Global, Environmental, and Occupational Health, School of Public Health, University of Maryland, College Park, MD, USA
| | - Leena Malayil
- Department of Global, Environmental, and Occupational Health, School of Public Health, University of Maryland, College Park, MD, USA
| | - Jessica Chopyk
- Department of Global, Environmental, and Occupational Health, School of Public Health, University of Maryland, College Park, MD, USA
| | - Eoghan Smyth
- Department of Global, Environmental, and Occupational Health, School of Public Health, University of Maryland, College Park, MD, USA
| | - Prachi Kulkarni
- Department of Global, Environmental, and Occupational Health, School of Public Health, University of Maryland, College Park, MD, USA
| | - Greg Raspanti
- Department of Global, Environmental, and Occupational Health, School of Public Health, University of Maryland, College Park, MD, USA
| | - Stephen B Thomas
- Center for Health Equity, School of Public Health, University of Maryland, College Park, MD, USA
| | - Amir Sapkota
- Department of Epidemiology and Biostatistics, School of Public Health, University of Maryland, College Park, MD, USA
| | - Emmanuel F Mongodin
- Department of Microbiology and Immunology, Institute for Genome Sciences, University of Maryland School of Medicine, Baltimore, MD, USA
- Division of Lung Diseases, National Institutes of Health (NIH), National Heart, Lung and Blood Institute (NHLBI), Bethesda, MD, USA
| | - Amy R Sapkota
- Department of Global, Environmental, and Occupational Health, School of Public Health, University of Maryland, College Park, MD, USA.
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Vishwakarma A, Verma D. 16S rDNA-Based Amplicon Analysis Unveiled a Correlation Between the Bacterial Diversity and Antibiotic Resistance Genes of Bacteriome of Commercial Smokeless Tobacco Products. Appl Biochem Biotechnol 2024:10.1007/s12010-024-04857-y. [PMID: 38407781 DOI: 10.1007/s12010-024-04857-y] [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] [Accepted: 02/04/2024] [Indexed: 02/27/2024]
Abstract
The distribution of bacterial-derived antibiotic resistance genes (ARGs) in smokeless tobacco products is less explored and encourages understanding of the ARG profile of Indian smokeless tobacco products. Therefore, in the present investigation, ten commercial smokeless tobacco products were assessed for their bacterial diversity to understand the correlation between the inhabitant bacteria and predicted ARGs using a 16S rDNA-based metagenome analysis. Overall analysis showed the dominance of two phyla, i.e., Firmicutes (43.07%) and Proteobacteria (8.13%) among the samples, where Bacillus (9.76%), Terribacillus (8.06%), Lysinibacillus (5.8%), Alkalibacterium (5.6%), Oceanobacillus (3.52%), and Dickeya (3.1%) like genera were prevalent among these phyla. The phylogenetic investigation of communities by reconstruction of unobserved states (PICRUSt)-based analysis revealed 217 ARGs which were categorized into nine groups. Cationic antimicrobial polypeptides (CAMP, 33.8%), vancomycin (23.4%), penicillin-binding protein (13.8%), multidrug resistance MDR (10%), and β-lactam (9.3%) were among the top five contributors to ARGs. Staphylococcus, Dickeya, Bacillus, Aerococcus, and Alkalibacterium showed their strong and significant correlation (p value < 0.05) with various antibiotic resistance mechanisms. ARGs of different classes (blaTEM, blaSHV, blaCTX, tetX, vanA, aac3-II, mcr-1, intI-1, and intI2) were also successfully amplified in the metagenomes of SMT samples using their specific primers. The prevalence of ARGs in inhabitant bacteria of smokeless tobacco products suggests making steady policies to regulate the hygiene of commercial smokeless tobacco products.
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Affiliation(s)
- Akanksha Vishwakarma
- Department of Environmental Microbiology, School of Earth and Environmental Sciences, Babasaheb Bhimrao Ambedkar University, Lucknow, India, 226025
| | - Digvijay Verma
- Department of Environmental Microbiology, School of Earth and Environmental Sciences, Babasaheb Bhimrao Ambedkar University, Lucknow, India, 226025.
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Stanfill SB, Hecht SS, Joerger AC, González PJ, Maia LB, Rivas MG, Moura JJG, Gupta AK, Le Brun NE, Crack JC, Hainaut P, Sparacino-Watkins C, Tyx RE, Pillai SD, Zaatari GS, Henley SJ, Blount BC, Watson CH, Kaina B, Mehrotra R. From cultivation to cancer: formation of N-nitrosamines and other carcinogens in smokeless tobacco and their mutagenic implications. Crit Rev Toxicol 2023; 53:658-701. [PMID: 38050998 DOI: 10.1080/10408444.2023.2264327] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2023] [Accepted: 09/20/2023] [Indexed: 12/07/2023]
Abstract
Tobacco use is a major cause of preventable morbidity and mortality globally. Tobacco products, including smokeless tobacco (ST), generally contain tobacco-specific N-nitrosamines (TSNAs), such as N'-nitrosonornicotine (NNN) and 4-(methylnitrosamino)-1-(3-pyridyl)-butanone (NNK), which are potent carcinogens that cause mutations in critical genes in human DNA. This review covers the series of biochemical and chemical transformations, related to TSNAs, leading from tobacco cultivation to cancer initiation. A key aim of this review is to provide a greater understanding of TSNAs: their precursors, the microbial and chemical mechanisms that contribute to their formation in ST, their mutagenicity leading to cancer due to ST use, and potential means of lowering TSNA levels in tobacco products. TSNAs are not present in harvested tobacco but can form due to nitrosating agents reacting with tobacco alkaloids present in tobacco during certain types of curing. TSNAs can also form during or following ST production when certain microorganisms perform nitrate metabolism, with dissimilatory nitrate reductases converting nitrate to nitrite that is then released into tobacco and reacts chemically with tobacco alkaloids. When ST usage occurs, TSNAs are absorbed and metabolized to reactive compounds that form DNA adducts leading to mutations in critical target genes, including the RAS oncogenes and the p53 tumor suppressor gene. DNA repair mechanisms remove most adducts induced by carcinogens, thus preventing many but not all mutations. Lastly, because TSNAs and other agents cause cancer, previously documented strategies for lowering their levels in ST products are discussed, including using tobacco with lower nornicotine levels, pasteurization and other means of eliminating microorganisms, omitting fermentation and fire-curing, refrigerating ST products, and including nitrite scavenging chemicals as ST ingredients.
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Affiliation(s)
- Stephen B Stanfill
- Tobacco and Volatiles Branch, National Center for Environmental Health, Centers for Disease Control and Prevention, Atlanta, GA, USA
| | - Stephen S Hecht
- Masonic Cancer Center, University of Minnesota, Minneapolis, MN, USA
| | - Andreas C Joerger
- Structural Genomics Consortium (SGC), Institute of Pharmaceutical Chemistry, Goethe University Frankfurt, Frankfurt am Main, Germany
| | - Pablo J González
- Department of Physics, Universidad Nacional Litoral, and CONICET, Santa Fe, Argentina
| | - Luisa B Maia
- Department of Chemistry, LAQV, REQUIMTE, NOVA School of Science and Technology (FCT NOVA), Caparica, Portugal
| | - Maria G Rivas
- Department of Physics, Universidad Nacional Litoral, and CONICET, Santa Fe, Argentina
| | - José J G Moura
- Department of Chemistry, LAQV, REQUIMTE, NOVA School of Science and Technology (FCT NOVA), Caparica, Portugal
| | | | - Nick E Le Brun
- School of Chemistry, Centre for Molecular and Structural Biochemistry, University of East Anglia, Norwich, UK
| | - Jason C Crack
- School of Chemistry, Centre for Molecular and Structural Biochemistry, University of East Anglia, Norwich, UK
| | - Pierre Hainaut
- Institute for Advanced Biosciences, Grenoble Alpes University, Grenoble, France
| | - Courtney Sparacino-Watkins
- University of Pittsburgh, School of Medicine, Division of Pulmonary Allergy and Critical Care Medicine, Vascular Medicine Institute, PA, USA
| | - Robert E Tyx
- Tobacco and Volatiles Branch, National Center for Environmental Health, Centers for Disease Control and Prevention, Atlanta, GA, USA
| | - Suresh D Pillai
- Department of Food Science & Technology, National Center for Electron Beam Research, Texas A&M University, College Station, TX, USA
| | - Ghazi S Zaatari
- Department of Pathology and Laboratory Medicine, American University of Beirut, Beirut, Lebanon
| | - S Jane Henley
- Division of Cancer Prevention and Control, Centers for Disease Control and Prevention, Atlanta, GA, USA
| | - Benjamin C Blount
- Tobacco and Volatiles Branch, National Center for Environmental Health, Centers for Disease Control and Prevention, Atlanta, GA, USA
| | - Clifford H Watson
- Tobacco and Volatiles Branch, National Center for Environmental Health, Centers for Disease Control and Prevention, Atlanta, GA, USA
| | - Bernd Kaina
- Institute of Toxicology, University Medical Center, Mainz, Germany
| | - Ravi Mehrotra
- Centre for Health, Innovation and Policy Foundation, Noida, India
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Yan K, Auger S, Diaz A, Naman J, Vemulapalli R, Hasina R, Izumchenko E, Shogan B, Agrawal N. Microbial Changes Associated With Oral Cavity Cancer Progression. Otolaryngol Head Neck Surg 2023; 168:1443-1452. [PMID: 36939272 PMCID: PMC10213157 DOI: 10.1002/ohn.211] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2022] [Revised: 11/05/2022] [Accepted: 11/10/2022] [Indexed: 01/25/2023]
Abstract
OBJECTIVE To examine the oral microbiome in the context of oral cavity squamous cell carcinoma. STUDY DESIGN Basic science research. SETTING Academic medical center. METHODS Oral swabs were collected from patients presenting to the operating room for management of oral cavity squamous cell carcinoma and from age- and sex-matched control patients receiving surgery for unrelated benign conditions. 16S ribosomal RNA (rRNA) sequencing was performed on genetic material obtained from swabs. A bacterial rRNA gene library was created and sequence reads were sorted into taxonomic units. RESULTS Thirty-one control patients (17 males) and 35 cancer patients (21 males) were enrolled. Ages ranged from 23 to 89 (median 63) for control patients and 35 to 86 (median 66) for cancer patients. Sixty-one percent of control patients and 63% of cancer patients were smokers. 16S analyses demonstrated a significant decrease in Streptococcus genera in oral cancer patients (34.11% vs 21.74% of the population, p = .04). Increases in Fusobacterium, Peptostreptococcus, Parvimonas, and Neisseria were also found. The abundance of these bacteria correlated with tumor T-stage. CONCLUSION 16S rRNA sequencing demonstrated changes in bacterial populations in oral cavity cancer and its progression compared to noncancer controls. We found increases in bacteria genera that correspond with tumor stage-Fusobacteria, Peptostreptococcus, Parvimonas, Neisseria, and Treponema. These data suggest that oral cancer creates an environment to facilitate foreign bacterial growth, rather than implicating a specific bacterial species in carcinogenesis. These bacteria can be employed as a potential marker for tumor progression or interrogated to better characterize the tumor microenvironment.
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Affiliation(s)
- Kenneth Yan
- Department of Otolaryngology-Head and Neck Surgery, Rutgers New Jersey Medical School, Newark, New Jersey, USA
| | - Samuel Auger
- Department of Surgery, Section of Otolaryngology, University of Chicago Medicine, Chicago, Illinois, USA
| | - Ashley Diaz
- Pritzker School of Medicine, University of Chicago, Chicago, Illinois, USA
| | - Julia Naman
- Department of Surgery, Section of Otolaryngology, University of Chicago Medicine, Chicago, Illinois, USA
| | - Ramya Vemulapalli
- Department of Surgery, Section of Otolaryngology, University of Chicago Medicine, Chicago, Illinois, USA
| | - Rifat Hasina
- Department of Surgery, Section of Otolaryngology, University of Chicago Medicine, Chicago, Illinois, USA
| | - Evgeny Izumchenko
- Department of Medicine, Section of Hematology and Oncology, University of Chicago Medicine, Chicago, Illinois, USA
| | - Benjamin Shogan
- Department of Medicine, Section of Hematology and Oncology, University of Chicago Medicine, Chicago, Illinois, USA
| | - Nishant Agrawal
- Department of Surgery, Section of Otolaryngology, University of Chicago Medicine, Chicago, Illinois, USA
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Sajid M, Srivastava S, Yadav RK, Joshi L, Bharadwaj M. Fungal Community Composition and Function Associated with Loose Smokeless Tobacco Products. Curr Microbiol 2023; 80:131. [PMID: 36894760 DOI: 10.1007/s00284-023-03237-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2022] [Accepted: 02/20/2023] [Indexed: 03/11/2023]
Abstract
Smokeless tobacco products (STPs) contain several microbial communities which are responsible for the formation of carcinogens, like tobacco-specific nitrosamine (TSNAs). A majority of STPs are sold in loose/unpackaged form which can be loaded with a diverse microbial population. Here, the fungal population and mycotoxins level of three popular Indian loose STPs, Dohra, Mainpuri Kapoori (MK), and loose leaf-chewing tobacco (LCT) was examined using metagenomic sequencing of ITS1 DNA segment of the fungal genome and LC-MS/MS, respectively. We observed that Ascomycota was the most abundant phylum and Sterigmatomyces and Pichia were the predominant fungal genera in loose STPs. MK displayed the highest α-diversity being enriched with pathogenic fungi Apiotrichum, Aspergillus, Candida, Fusarium, Trichosporon, and Wallemia. Further, FUNGuild analysis revealed an abundance of saprotrophs in MK, while pathogen-saprotroph-symbiotroph were abundant in Dohra and LCT. The level of a fungal toxin (ochratoxins A) was high in the MK product. This study caution that loose STPs harbor various harmful fungi that can infect their users and deliver fungal toxins or disrupt the oral microbiome of SLT users which can contribute to several oral pathologies.
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Affiliation(s)
- Mohammad Sajid
- Division of Molecular Genetics and Biochemistry, Molecular Biology Group, ICMR-National Institute of Cancer Prevention and Research, Noida, Uttar Pradesh, India
| | - Sonal Srivastava
- Division of Molecular Genetics and Biochemistry, Molecular Biology Group, ICMR-National Institute of Cancer Prevention and Research, Noida, Uttar Pradesh, India
| | - Ravi K Yadav
- Division of Molecular Genetics and Biochemistry, Molecular Biology Group, ICMR-National Institute of Cancer Prevention and Research, Noida, Uttar Pradesh, India
| | - Lata Joshi
- Division of Molecular Genetics and Biochemistry, Molecular Biology Group, ICMR-National Institute of Cancer Prevention and Research, Noida, Uttar Pradesh, India
| | - Mausumi Bharadwaj
- Division of Molecular Genetics and Biochemistry, Molecular Biology Group, ICMR-National Institute of Cancer Prevention and Research, Noida, Uttar Pradesh, India.
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Chattopadhyay S, Ramachandran P, Malayil L, Mongodin EF, Sapkota AR. Conventional tobacco products harbor unique and heterogenous microbiomes. ENVIRONMENTAL RESEARCH 2023; 220:115205. [PMID: 36592812 PMCID: PMC9898174 DOI: 10.1016/j.envres.2022.115205] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/23/2022] [Revised: 12/08/2022] [Accepted: 12/30/2022] [Indexed: 06/17/2023]
Abstract
While an increasing number of studies have evaluated tobacco microbiomes, comparative microbiome analyses across diverse tobacco products are non-existent. Moreover, to our knowledge, no previous studies have characterized the metabolically-active (live) fraction of tobacco bacterial communities and compared them across products. To address these knowledge gaps, we compared bacterial communities across four commercial products (cigarettes, little cigars, cigarillos and hookah) and one research cigarette product. After total DNA extraction (n = 414) from all samples, the V3V4 region of the 16S rRNA gene was sequenced on the Illumina HiSeq platform. To identify metabolically-active bacterial communities within these products, we applied a coupled 5-bromo-2'-deoxyuridine labeling and sequencing approach to a subset of samples (n = 56). Each tobacco product was characterized by its signature microbiome, along with a shared microbiome across all tobacco products consisting of Pseudomonas aeruginosa, P. putida, P. alcaligenes, Bacillus subtilis, and Klebsiella pneumoniae. Comparing across products (using Linear discriminant analysis Effect Size (LEfSe)), a significantly higher (p < 0.05) relative abundance of Klebsiella and Acinetobacter was observed in commercial cigarettes, while a higher relative abundance of Pseudomonas and Pantoea was observed in research cigarettes. Methylorubrum and Paenibacillus were higher in hookah, and Brevibacillus, Lactobacillus, Bacillus, Lysinibacillus, and Staphylococcus were higher in little cigars and cigarillos. Across all products, the majority of the metabolically-active bacterial communities belonged to the genus Pseudomonas, followed by several genera within the Firmicutes phylum (Bacillus, Terribacillus, and Oceanobacillus). Identification of some metabolically-active pathogens such as Bacillus cereus and Haemophilus parainfluenzae in commercial products is of concern because of the potential for these microorganisms to be transferred to users' respiratory tracts via mainstream smoke. Future work is warranted to evaluate the potential impact of these tobacco bacterial communities on users' oral and lung microbiomes, which play such an important role on the spectrum from health to disease.
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Affiliation(s)
- Suhana Chattopadhyay
- Maryland Institute of Applied Environmental Health, School of Public Health, University of Maryland, College Park, MD, USA
| | - Padmini Ramachandran
- Food and Drug Administration, Office of Regulatory Science, Division of Microbiology, HFS-712, College Park, MD, USA
| | - Leena Malayil
- Maryland Institute of Applied Environmental Health, School of Public Health, University of Maryland, College Park, MD, USA
| | - Emmanuel F Mongodin
- Institute for Genome Sciences and Department of Microbiology and Immunology, University of Maryland School of Medicine, Baltimore, MD, USA
| | - Amy R Sapkota
- Maryland Institute of Applied Environmental Health, School of Public Health, University of Maryland, College Park, MD, USA.
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Vishwakarma A, Srivastava A, Mishra S, Verma D. Taxonomic and functional profiling of Indian smokeless tobacco bacteriome uncovers several bacterial-derived risks to human health. World J Microbiol Biotechnol 2022; 39:20. [PMID: 36409379 DOI: 10.1007/s11274-022-03461-8] [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: 08/10/2022] [Accepted: 11/07/2022] [Indexed: 11/22/2022]
Abstract
Smokeless tobacco (ST) consumption keeps human oral health at high risk which is one of the major reasons for oral tumorigenesis. The chemical constituents of the ST products have been well discussed; however, the inhabitant microbial diversity of the ST products is less explored especially from south Asian regions. Therefore, the present investigation discusses the bacteriome-based analysis of indigenous tobacco products. The study relies on 16S amplicon-based bacteriome analysis of Indian smokeless tobacco (ST) products using a metagenomic approach. A total of 59,15,143 high-quality reads were assigned to 34 phyla, 82 classes, 176 orders, 256 families, 356 genera, and 154 species using the SILVA database. Of the phyla (> 1%), Firmicutes dominate among the Indian smokeless tobacco followed by Proteobacteria, Bacteroidetes, and Actinobacteria (> 1%). Whereas, at the genera level (> 1%), Lysinibacillus, Dickeya, Terribacillus, and Bacillus dominate. The comparative analysis between the loose tobacco (LT) and commercial tobacco (CT) groups showed no significant difference at the phyla level, however, only three genera (Bacillus, Aerococcus, and Halomonas) were identified as significantly different between the groups. It indicates that CT and LT tobacco share similar bacterial diversity and poses equal health risks to human oral health. The phylogenetic investigation of communities by reconstruction of unobserved states (PICRUSt 2.0) based analysis uncovered several genes involved in nitrate/nitrite reduction, biofilm formation, and pro-inflammation that find roles in oral pathogenesis including oral cancer. The strong correlation analysis of these genes with several pathogenic bacteria suggests that tobacco products pose a high bacterial-derived risk to human health. The study paves the way to understand the bacterial diversity of Indian smokeless tobacco products and their putative functions with respect to human oral health. The study grabs attention to the bacterial diversity of the smokeless tobacco products from a country where tobacco consumers are rampantly prevalent however oral health is of least concern.
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Affiliation(s)
- Akanksha Vishwakarma
- Department of Environmental Microbiology, Babasaheb Bhimrao Ambedkar University, Lucknow, 226025, India
| | - Ankita Srivastava
- Department of Environmental Microbiology, Babasaheb Bhimrao Ambedkar University, Lucknow, 226025, India
| | - SukhDev Mishra
- Department of Bio-Statistics and Data Management, ICMR-National Institute of Occupational Health, Ahmedabad, India
| | - Digvijay Verma
- Department of Environmental Microbiology, Babasaheb Bhimrao Ambedkar University, Lucknow, 226025, India.
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Sudi SM, Kabbashi S, Roomaney IA, Aborass M, Chetty M. The genetic determinants of oral diseases in Africa: The gaps should be filled. FRONTIERS IN ORAL HEALTH 2022; 3:1017276. [PMID: 36304994 PMCID: PMC9593064 DOI: 10.3389/froh.2022.1017276] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2022] [Accepted: 09/16/2022] [Indexed: 11/07/2022] Open
Abstract
Oral diseases are a major health concern and are among the most prevalent diseases globally. This problem is becoming more prominent in the rapidly growing populations of Africa. It is well documented that Africa exhibits the most diverse genetic make-up in the world. However, little work has been conducted to understand the genetic basis of oral diseases in Africans. Oral health is often neglected and receives low prioritisation from funders and governments. The genetic determinants of highly prevalent oral diseases such as dental caries and periodontal disease, and regionally prevalent conditions such as oral cancer and NOMA, are largely under-researched areas despite numerous articles alluding to a high burden of these diseases in African populations. Therefore, this review aims to shed light on the significant gaps in research on the genetic and genomic aspects of oral diseases in African populations and highlights the urgent need for evidence-based dentistry, in tandem with the development of the dentist/scientist workforce.
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Sajid M, Srivastava S, Yadav RK, Singh H, Singh S, Bharadwaj M. Composition and Ecological Functionality of Fungal Communities Associated with Smokeless Tobacco Products Mainly Consumed in India. Microbiol Spectr 2022; 10:e0227321. [PMID: 35695566 PMCID: PMC9430657 DOI: 10.1128/spectrum.02273-21] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2021] [Accepted: 04/13/2022] [Indexed: 01/05/2023] Open
Abstract
The microbial communities present in smokeless tobacco products (STPs) perform critical steps in the synthesis of carcinogens, mainly tobacco-specific nitrosamines (TSNAs). Most studies emphasize the bacterial component, and the mycobiome of STPs has not been well characterized. In this study, we investigated the fungal communities in the different categories of STPs by sequencing the internal transcribed spacer (ITS) rRNA region of the fungal genome. The ecological character of the fungal community associated with STPs was determined by using FUNGuild. Our results indicated that Ascomycota and Basidiomycota were the most abundant fungal phyla across all STPs. The predominant fungal genera in STPs were Pichia, Sterigmatomyces, and Mortierella. The α-diversity varied significantly across the STPs based on observed, Fisher, and Shannon indices. Using SparCC cooccurrence network analysis, significant positive correlations of 58.5% and negative connections of 41.5% were obtained among fungal genera identified in STPs. Furthermore, the functional predictions by FUNGuild determined that STPs possessed high abundances of saprotroph and pathotroph-saprotroph-symbiotroph fungal trophic groups. At the functional guild level, the qiwam samples contained high abundances of soil saprotrophs, while plant pathogens were prevalent in pan-masala samples. These results suggest that various fungal populations reside in STPs and interrelate with each other and can contribute to the synthesis of TSNAs. This study has established the basis for future large-scale investigations of STP-associated mycobiota and the impact of such mycobiota in oral carcinogenesis in STP users via inflammation and carcinogens (TSNAs and mycotoxins). IMPORTANCE Smokeless tobacco products (STPs) contain complex microbial communities that influence the synthesis of carcinogens, such as tobacco-specific nitrosamines (TSNAs). Research on STP-associated bacterial populations revealed connections between bacterial metabolism and TSNA synthesis. The abundance of the fungal population may also have an impact on the production of TSNAs. This study examined STPs popularly used in India, and diverse fungal communities were identified in these STPs. Pichia, Sterigmatomyces, and Mortierella were the predominant fungal genera in the STPs. High abundances of saprotroph and pathotroph-saprotroph-symbiotroph trophic groups in STPs could affect the degradation of tobacco products and the synthesis of TSNAs.
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Affiliation(s)
- Mohammad Sajid
- Division of Molecular Genetics and Biochemistry, Molecular Biology Group, ICMR-National Institute of Cancer Prevention and Research, Noida, Uttar Pradesh, India
| | - Sonal Srivastava
- Division of Molecular Genetics and Biochemistry, Molecular Biology Group, ICMR-National Institute of Cancer Prevention and Research, Noida, Uttar Pradesh, India
| | - Ravi Kumar Yadav
- Division of Molecular Genetics and Biochemistry, Molecular Biology Group, ICMR-National Institute of Cancer Prevention and Research, Noida, Uttar Pradesh, India
| | - Harpreet Singh
- Division of Biomedical Informatics, Indian Council of Medical Research (ICMR), New Delhi, India
| | - Shalini Singh
- ICMR-National Institute of Cancer Prevention and Research, Noida, Uttar Pradesh, India
- WHO-FCTC Global Knowledge Hub on Smokeless Tobacco, ICMR-National Institute of Cancer Prevention and Research, Noida, Uttar Pradesh, India
| | - Mausumi Bharadwaj
- Division of Molecular Genetics and Biochemistry, Molecular Biology Group, ICMR-National Institute of Cancer Prevention and Research, Noida, Uttar Pradesh, India
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Nie F, Wang L, Huang Y, Yang P, Gong P, Feng Q, Yang C. Characteristics of Microbial Distribution in Different Oral Niches of Oral Squamous Cell Carcinoma. Front Cell Infect Microbiol 2022; 12:905653. [PMID: 36046741 PMCID: PMC9421053 DOI: 10.3389/fcimb.2022.905653] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2022] [Accepted: 04/28/2022] [Indexed: 11/15/2022] Open
Abstract
Oral squamous cell carcinoma (OSCC), one of the most common malignant tumors of the head and neck, is closely associated with the presence of oral microbes. However, the microbiomes of different oral niches in OSCC patients and their association with OSCC have not been adequately characterized. In this study, 305 samples were collected from 65 OSCC patients, including tumor tissue, adjacent normal tissue (paracancerous tissue), cancer surface tissue, anatomically matched contralateral normal mucosa, saliva, and tongue coat. 16S ribosomal DNA (16S rDNA) sequencing was used to compare the microbial composition, distribution, and co-occurrence network of different oral niches. The association between the microbiome and the clinical features of OSCC was also characterized. The oral microbiome of OSCC patients showed a regular ecological distribution. Tumor and paracancerous tissues were more microbially diverse than other oral niches. Cancer surface, contralateral normal mucosa, saliva, and tongue coat showed similar microbial compositions, especially the contralateral normal mucosa and saliva. Periodontitis-associated bacteria of the genera Fusobacterium, Prevotella, Porphyromonas, Campylobacter, and Aggregatibacter, and anaerobic bacteria were enriched in tumor samples. The microbiome was highly correlated with tumor clinicopathological features, with several genera (Lautropia, Asteroleplasma, Parvimonas, Peptostreptococcus, Pyramidobacter, Roseburia, and Propionibacterium) demonstrating a relatively high diagnostic power for OSCC metastasis, potentially providing an indicator for the development of OSCC.
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Affiliation(s)
- Fujiao Nie
- Department of Periodontology, School and Hospital of Stomatology, Cheeloo College of Medicine, Shandong University, Jinan, China
- Shandong Key Laboratory of Oral Tissue Regeneration & Shandong Engineering Laboratory for Dental Materials and Oral Tissue Regeneration, Jinan, China
| | - Lihua Wang
- Department of Periodontology, School and Hospital of Stomatology, Cheeloo College of Medicine, Shandong University, Jinan, China
- Department of Human Microbiome, School and Hospital of Stomatology, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Yingying Huang
- Department of Oral and Maxillofacial Surgery, Qilu Hospital of Shandong University, Jinan, China
- Institute of Stomatology, Shandong University, Jinan, China
| | - Pishan Yang
- Department of Periodontology, School and Hospital of Stomatology, Cheeloo College of Medicine, Shandong University, Jinan, China
- Shandong Key Laboratory of Oral Tissue Regeneration & Shandong Engineering Laboratory for Dental Materials and Oral Tissue Regeneration, Jinan, China
| | - Pizhang Gong
- Department of Periodontology, School and Hospital of Stomatology, Cheeloo College of Medicine, Shandong University, Jinan, China
- Shandong Key Laboratory of Oral Tissue Regeneration & Shandong Engineering Laboratory for Dental Materials and Oral Tissue Regeneration, Jinan, China
| | - Qiang Feng
- Department of Periodontology, School and Hospital of Stomatology, Cheeloo College of Medicine, Shandong University, Jinan, China
- Department of Human Microbiome, School and Hospital of Stomatology, Cheeloo College of Medicine, Shandong University, Jinan, China
- *Correspondence: Qiang Feng, ; Chengzhe Yang,
| | - Chengzhe Yang
- Department of Oral and Maxillofacial Surgery, Qilu Hospital of Shandong University, Jinan, China
- Institute of Stomatology, Shandong University, Jinan, China
- *Correspondence: Qiang Feng, ; Chengzhe Yang,
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11
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Delineating the Bacteriome of Packaged and Loose Smokeless Tobacco Products Available in North India. Appl Microbiol Biotechnol 2022; 106:4129-4144. [PMID: 35604437 DOI: 10.1007/s00253-022-11979-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2022] [Revised: 05/08/2022] [Accepted: 05/10/2022] [Indexed: 12/12/2022]
Abstract
Smokeless tobacco product (STP) consumption is a significant public health threat across the globe. STPs are not only a storehouse of carcinogens and toxicants but also harbor microbes that aid in the conversion of tobacco alkaloids to carcinogenic tobacco-specific nitrosamines (TSNAs), thereby posing a further threat to the health of its consumers. The present study analyzed the bacterial diversity of popular dry and loose STPs by 16S rRNA gene sequencing. This NGS-based investigation revealed four dominant phyla Actinobacteria, Bacteroidetes, Firmicutes, and Proteobacteria and identified 549 genera, Prevotella, Bacteroides, and Lactobacillus constituting the core bacteriome of these STPs. The most significantly diverse bacteriome profile was displayed by the loose STP Mainpuri kapoori. The study further predicted the functional attributes of the prevalent genera by Phylogenetic Investigation of Communities by Reconstruction of Unobserved States (PICRUSt) algorithm. Genes encoding for nitrate and nitrite reduction and transport enzymes, antibiotic resistance, multi-drug transporters and efflux pumps, secretion of endo- and exotoxin, and other pro-inflammatory molecules were identified. The loose STPs showed the highest level of nitrogen metabolism genes which can contribute to the synthesis of TSNAs. This study reveals the bacteriome of Indian domestic loose STPs that stagger behind in manufacturing and storage stringencies. Our results raise an alarm that the consumption of STPs harboring pathogenic genera can potentially lead to the onset of several oral and systemic diseases. Nevertheless, an in-depth correlation analysis of the microbial diversity of STPs and their elicit impact on consumer health is warranted. KEY POINTS: • Smokeless tobacco harbors bacteria that aid in synthesis of carcinogenic nitrosamines. • Most diverse bacteriome profile was displayed by loose smokeless tobacco products. • Pathogenic genera in these products can harm the oral and systemic health of users.
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12
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Srivastava A, Mishra S, Garg PK, Dubey AK, Deo SVS, Verma D. Comparative and analytical characterization of the oral bacteriome of smokeless tobacco users with oral squamous cell carcinoma. Appl Microbiol Biotechnol 2022; 106:4115-4128. [PMID: 35596785 DOI: 10.1007/s00253-022-11980-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2021] [Revised: 05/09/2022] [Accepted: 05/10/2022] [Indexed: 12/24/2022]
Abstract
Oral cavity squamous cell carcinoma (OSCC) is the most common type of head and neck cancer worldwide. Smokeless tobacco (SLT) has been well proven for its role in oral carcinogenesis due to the abundance of several carcinogens. However, the role of inhabitant microorganisms in the oral cavity of smokeless tobacco users has not yet been well explored in the context of OSCC. Therefore, the present investigation was conceived to analyze the oral bacteriome of smokeless tobacco users having OSCC (CP group). With the assistance of illumina-based sequencing of bacterial-specific V3 hypervariable region of 16S rDNA gene, 71,969 OTUs (operational taxonomic units) were categorized into 18 phyla and 166 genera. The overall analysis revealed that the oral bacteriome of the patients with OSCC, who were smokeless tobacco users, was significantly different compared to the healthy smokeless tobacco users (HTC group) and non-users (HI users). The appearance of 14 significantly abundant genera [FDR (false discovery rate) adjusted probability value of significance (p value) < 0.05] among the CP group showed the prevalence of tobacco-specific nitrosamines forming bacteria (Staphylococcus, Fusobacterium, and Campylobacter). The functional attributes of the oral bacteriome of the CP group can also be correlated with the genes involved in oncogenesis. This study is the first report on the oral bacteriome of Indian patients with OSCC who were chronic tobacco chewers. The results of the present study will pave the way to understand the influence of smokeless tobacco on the oral bacteriome of OSCC patients. KEY POINTS: • Oral bacteriome of OSCC patients differ from healthy smokeless tobacco (SLT) users and SLT non-users. • Smokeless tobacco influences the oral bacteriome of OSCC group. • Oral bacteriome specific diagnostics may be developed for pre-diagnosis of oral cancer.
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Affiliation(s)
- Ankita Srivastava
- Department of Environmental Microbiology, Babasaheb Bhimrao Ambedkar University, Lucknow, India
| | - SukhDev Mishra
- Department of Bio-Statistics and Data Management, ICMR-National Institute of Occupational Health, Ahmedabad, India
| | - Pankaj Kumar Garg
- Department of Surgical Oncology, Shri Guru Ram Rai Institute of Medical and Health Sciences and Shri Mahant Indiresh Hospital, Dehradun, Uttarakhand, India
| | - Ashok Kumar Dubey
- Division of Biological Sciences and Engineering, Netaji Subhas University of Technology, New Delhi, India
| | - S V S Deo
- Department of Surgical Oncology, All India Institute of Medical Sciences, New Delhi, India
| | - Digvijay Verma
- Department of Environmental Microbiology, Babasaheb Bhimrao Ambedkar University, Lucknow, India.
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13
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Tyx RE, Rivera AJ, Satten GA, Keong LM, Kuklenyik P, Lee GE, Lawler TS, Kimbrell JB, Stanfill SB, Valentin-Blasini L, Watson CH. Associations between microbial communities and key chemical constituents in U.S. domestic moist snuff. PLoS One 2022; 17:e0267104. [PMID: 35507593 PMCID: PMC9067656 DOI: 10.1371/journal.pone.0267104] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2021] [Accepted: 04/01/2022] [Indexed: 12/26/2022] Open
Abstract
BACKGROUND Smokeless tobacco (ST) products are widely used throughout the world and contribute to morbidity and mortality in users through an increased risk of cancers and oral diseases. Bacterial populations in ST contribute to taste, but their presence can also create carcinogenic, Tobacco-Specific N-nitrosamines (TSNAs). Previous studies of microbial communities in tobacco products lacked chemistry data (e.g. nicotine, TSNAs) to characterize the products and identify associations between carcinogen levels and taxonomic groups. This study uses statistical analysis to identify potential associations between microbial and chemical constituents in moist snuff products. METHODS We quantitatively analyzed 38 smokeless tobacco products for TSNAs using liquid chromatography with tandem mass spectrometry (LC-MS/MS), and nicotine using gas chromatography with mass spectrometry (GC-MS). Moisture content determinations (by weight loss on drying), and pH measurements were also performed. We used 16S rRNA gene sequencing to characterize the microbial composition, and additionally measured total 16S bacterial counts using a quantitative PCR assay. RESULTS Our findings link chemical constituents to their associated bacterial populations. We found core taxonomic groups often varied between manufacturers. When manufacturer and flavor were controlled for as confounding variables, the genus Lactobacillus was found to be positively associated with TSNAs. while the genera Enteractinococcus and Brevibacterium were negatively associated. Three genera (Corynebacterium, Brachybacterium, and Xanthomonas) were found to be negatively associated with nicotine concentrations. Associations were also investigated separately for products from each manufacturer. Products from one manufacturer had a positive association between TSNAs and bacteria in the genus Marinilactibacillus. Additionally, we found that TSNA levels in many products were lower compared with previously published chemical surveys. Finally, we observed consistent results when either relative or absolute abundance data were analyzed, while results from analyses of log-ratio-transformed abundances were divergent.
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Affiliation(s)
- Robert E. Tyx
- Centers for Disease Control and Prevention, National Center for Environmental Health, Division of Laboratory Sciences, Atlanta, Georgia, United States of America
| | - Angel J. Rivera
- Centers for Disease Control and Prevention, National Center for Environmental Health, Division of Laboratory Sciences, Atlanta, Georgia, United States of America
| | - Glen A. Satten
- Centers for Disease Control and Prevention, National Center for Chronic Disease Prevention and Health Promotion, Division of Reproductive Health, Atlanta, Georgia, United States of America
- Department of Gynecology and Obstetrics, Emory University School of Medicine, Atlanta, Georgia, United States of America
| | - Lisa M. Keong
- Battelle Analytical Services, Atlanta, Georgia, United States of America
| | - Peter Kuklenyik
- Centers for Disease Control and Prevention, National Center for Environmental Health, Division of Laboratory Sciences, Atlanta, Georgia, United States of America
| | - Grace E. Lee
- Gangarosa Department of Environmental Health, Rollins School of Public Health, Emory University, Atlanta, Georgia, United States of America
| | - Tameka S. Lawler
- Centers for Disease Control and Prevention, National Center for Environmental Health, Division of Laboratory Sciences, Atlanta, Georgia, United States of America
| | - Jacob B. Kimbrell
- Centers for Disease Control and Prevention, National Center for Environmental Health, Division of Laboratory Sciences, Atlanta, Georgia, United States of America
| | - Stephen B. Stanfill
- Centers for Disease Control and Prevention, National Center for Environmental Health, Division of Laboratory Sciences, Atlanta, Georgia, United States of America
| | - Liza Valentin-Blasini
- Centers for Disease Control and Prevention, National Center for Environmental Health, Division of Laboratory Sciences, Atlanta, Georgia, United States of America
| | - Clifford H. Watson
- Centers for Disease Control and Prevention, National Center for Environmental Health, Division of Laboratory Sciences, Atlanta, Georgia, United States of America
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14
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Satir S. The relationship between oral cancer and cadmium: a review. Mol Biol Rep 2022; 49:2413-2419. [PMID: 34822067 DOI: 10.1007/s11033-021-07000-w] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2021] [Accepted: 11/19/2021] [Indexed: 10/19/2022]
Abstract
Cadmium (Cd) has been classified as a type I carcinogen. Since it is ingested orally through food and tobacco use, Cd is likely to be closely related to oral cancers. The relationship between cadmium and oral cancer was investigated using papers on Pubmed and Web of Science. Thus a total of 11 studies from these databases were included in the review. Cd concentrations were significantly higher in both the blood and hair of oral cancer patients than in controls. Additionally, it has been reported that Cd increases the activity of reactive oxygen species. Tobacco plants contain varying levels of Cd. The presence of high Cd concentrations in patients who use tobacco products and develop oral cancer is strong evidence that Cd is directly related to oral cancer. While planning a study to determine the Cd concentrations in biological samples, it is advisable to examine the methodologies of previous studies and to avoid technical deficiencies. New cell line studies are required to explain the relationship between Cd and autophagy-apoptosis.
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Affiliation(s)
- Samed Satir
- Faculty of Dentistry, Oral and Maxillofacial Radiology, Alanya Alaaddin Keykubat University, Konaklı, Mustafa Kemal Boulevard, Alanya, 07490, Antalya, Turkey.
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15
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Sajid M, Srivastava S, Kumar A, Kumar A, Singh H, Bharadwaj M. Bacteriome of Moist Smokeless Tobacco Products Consumed in India With Emphasis on the Predictive Functional Potential. Front Microbiol 2022; 12:784841. [PMID: 35003015 PMCID: PMC8740325 DOI: 10.3389/fmicb.2021.784841] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2021] [Accepted: 11/24/2021] [Indexed: 01/22/2023] Open
Abstract
Smokeless tobacco products (STPs) carry assorted microbial population that contributes to carcinogens synthesis like tobacco-specific nitrosamines (TSNAs). Extensive exploration of microbiota-harboring STPs is required to understand their full carcinogenic potential. Here, we applied 16S rRNA gene sequencing to investigate bacteriome present in moist STPs immensely consumed in India (Khaini, Moist-snuff, Qiwam, and Snus). Further, the functional metagenome was speculated by PICRUSt (Phylogenetic Investigation of Communities by Reconstruction of Unobserved States) to assign the abundance of genes related to nitrogen metabolism, bacterial toxins, antibiotic drug resistance and other pro-inflammatory molecules. Highly diverse bacterial communities were observed in all moist STPs. Taxonomic analysis revealed a total of 549 genera belonging to four major phyla Proteobacteria, Firmicutes, Bacteroidetes and Actinobacteria. Overall, the core bacterial genera Acinetobacter, Bacillus, Prevotella, Acetobacter, Lactobacillus, Paracoccus, Flavobacterium, and Bacteroides were significantly abundant in moist STPs. Elevated moisture-holding products like Moist-snuff and Qiwam harbor rich bacterial species diversity and showed similar bacteriome composition. Furthermore, Qiwam products showed the highest level of genes associated with nitrogen metabolism, antibiotic resistance, toxins, and pro-inflammation (predicted by PICRUSt) which can contribute to the synthesis of TSNAs and induction of oral cancer. The present broad investigation of moist STPs-associated bacteriome prevalence and their detailed metabolic potential will provide novel insight into the oral carcinogenesis induced by STPs.
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Affiliation(s)
- Mohammad Sajid
- Division of Molecular Genetics and Biochemistry, Molecular Biology Group, ICMR-National Institute of Cancer Prevention and Research, Noida, India
| | - Sonal Srivastava
- Division of Molecular Genetics and Biochemistry, Molecular Biology Group, ICMR-National Institute of Cancer Prevention and Research, Noida, India
| | - Amit Kumar
- ICMR-AIIMS Computational Genomics Centre, Division of Biomedical Informatics, Indian Council of Medical Research (ICMR), New Delhi, India
| | - Anuj Kumar
- Molecular Biology Group, ICMR-National Institute of Cancer Prevention and Research, Noida, India
| | - Harpreet Singh
- ICMR-AIIMS Computational Genomics Centre, Division of Biomedical Informatics, Indian Council of Medical Research (ICMR), New Delhi, India
| | - Mausumi Bharadwaj
- Division of Molecular Genetics and Biochemistry, Molecular Biology Group, ICMR-National Institute of Cancer Prevention and Research, Noida, India
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16
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Srivastava A, Mishra S, Verma D. Characterization of Oral Bacterial Composition of Adult Smokeless Tobacco Users from Healthy Indians Using 16S rDNA Analysis. MICROBIAL ECOLOGY 2021; 82:1061-1073. [PMID: 33634334 DOI: 10.1007/s00248-021-01711-0] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/27/2020] [Accepted: 02/03/2021] [Indexed: 05/25/2023]
Abstract
The present investigation is aiming to report the oral bacterial composition of smokeless tobacco (SLT) users and to determine the influence of SLT products on the healthy Indian population. With the aid of the V3 hypervariable region of the 16S rRNA gene, a total of 8,080,889 high-quality reads were clustered into 15 phyla and 180 genera in the oral cavity of the SLT users. Comparative analysis revealed a more diverse microbiome where two phyla and sixteen genera were significantly different among the SLT users as compared to the control group (p-value < 0.05). The prevalence of Fusobacteria-, Porphyromonas-, Desulfobulbus-, Enterococcus-, and Parvimonas-like genera among SLT users indicates altered bacterial communities among SLT users. Besides, the depletion of health-compatible bacteria such as Lactobacillus and Haemophilus also suggests poor oral health. Here, the majority of the altered genera belong to Gram-negative anaerobes that have been reported for assisting biofilm formation that leads in the progression of several oral diseases. The PICRUSt analysis further supports the hypothesis where a significant increase in the count of the genes involved in the metabolism of nitrogen, amino acids, and nicotinate/nicotinamide was observed among tobacco chewers. Moreover, this study has a high significance in Indian prospects where the SLT consumers are prevalent but we are deficient in information on their oral microbiome.
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Affiliation(s)
- Ankita Srivastava
- Department of Microbiology, Babasaheb Bhimrao Ambedkar University, Lucknow, India
| | - SukhDev Mishra
- Department of Bio-Statistics and Data Management, ICMR-National Institute of Occupational Health, Ahmedabad, India
| | - Digvijay Verma
- Department of Microbiology, Babasaheb Bhimrao Ambedkar University, Lucknow, India.
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Sami A, Elimairi I, Patangia D, Watkins C, Ryan CA, Ross RP, Stanton C. The ultra-structural, metabolomic and metagenomic characterisation of the sudanese smokeless tobacco 'Toombak'. Toxicol Rep 2021; 8:1498-1512. [PMID: 34401360 PMCID: PMC8355839 DOI: 10.1016/j.toxrep.2021.07.008] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2021] [Revised: 06/08/2021] [Accepted: 07/07/2021] [Indexed: 12/04/2022] Open
Abstract
Toombak, a form of moist smokeless tobacco from Sudan is placed as a dip in the oral cavity most commonly used by males. The microbiome of Toombak predominantly consists of the phyla, Firmicutes and Actinobacteria while abundant species include Corynebacterium casei, Atopostipes suicloacalis and Oceanobacillus chironomi. High concentrations of iron, volatile aldehydes and tobacco specific nitrosamines were found in Toombak and can lead to toxicity. Toombak has a non-homogenous abrasive surface with a high sodium level in the ready to buy form that can damage the oral mucosa. New measures must be taken in Sudan to limit harmful compounds in Toombak.
Toombak is a smokeless tobacco produced from the Nicotiana rustica tobacco plant from Sudan. Pre-prepared and ready to buy Toombak samples were analysed using mass spectrometry (heavy metals), gas and liquid chromatography (metabolomics), 16S rRNA metagenomic sequencing (microbiome) and Phylogenetic Investigation of Communities by Reconstruction of Unobserved States (PICRUSt), scanning electron microscopy with energy dispersive X-ray spectroscopy (SEM-EDX) and pH analysis. Chromium, cobalt, and copper were high in the pre-prepared form of Toombak while iron, tobacco specific nitrosamines (TSNAs), formaldehyde and acetaldehyde were high in both types. Firmicutes and Actinobacteria dominated Toombak. Samples of ready to buy Toombak showed inter-variational differences depending on place of purchase. We found Virgibacillus were increased in the pre-prepared form while Corynebacterium casei, Atopococus tabaci, Atopostipes suicloacalis, Oceanobacillus chironomi and Staphylococcus gallinarum were the most abundant species in the ready to buy forms. PICRUSt analysis highlighted increased activity of metal transport systems in the ready to buy samples as well as an antibiotic transport system. SEM-EDX highlighted large non-homogenous, irregular particles with increased sodium, while pH of samples was in the alkaline range. The final composition of Toombak is affected by its method of preparation and the end product has the potential to impart many negative consequences on the health of its users. TSNA levels observed in Toombak were some of the highest in the world while the micro-environment of Toombak supports a distinct microbiota profile.
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Affiliation(s)
- Amel Sami
- APC Microbiome Institute, University College Cork, Cork, T12 YN60, Ireland.,Department of Oral and Maxillofacial Surgery and Oral Medicine, Faculty of Dentistry, National Ribat University, Nile Street, Khartoum, 1111, Sudan
| | - Imad Elimairi
- Department of Oral and Maxillofacial Surgery and Oral Medicine, Faculty of Dentistry, National Ribat University, Nile Street, Khartoum, 1111, Sudan
| | - Dhrati Patangia
- APC Microbiome Institute, University College Cork, Cork, T12 YN60, Ireland
| | - Claire Watkins
- APC Microbiome Institute, University College Cork, Cork, T12 YN60, Ireland
| | - C Anthony Ryan
- Department of Paediatrics and Child Health, University College Cork, Cork, T12 DFK4, Ireland
| | - R Paul Ross
- APC Microbiome Institute, University College Cork, Cork, T12 YN60, Ireland
| | - Catherine Stanton
- APC Microbiome Institute, University College Cork, Cork, T12 YN60, Ireland.,Teagasc Food Research Centre, Moorepark, Fermoy, Cork, P61 C996, Ireland
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Vishwakarma A, Verma D. Microorganisms: crucial players of smokeless tobacco for several health attributes. Appl Microbiol Biotechnol 2021; 105:6123-6132. [PMID: 34331556 DOI: 10.1007/s00253-021-11460-2] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2021] [Revised: 07/14/2021] [Accepted: 07/15/2021] [Indexed: 01/20/2023]
Abstract
Global consumption of smokeless tobacco (SLT) reached 300 million users worldwide majorly from middle-income countries. More than 4000 chemical compounds represent it as one of the noxious consumable products by humans. Besides toxicants/carcinogens, the heavy microbial load on smokeless tobacco further keeps human health at higher risk. Several of these inhabitant microbes participate in biofilm formation and secrete endotoxin/mycotoxins and proinflammatory-like molecules, leading to several oral diseases. Tobacco-associated bacteria exhibit their role in tobacco-specific nitrosamines (TSNAs) formation and acetaldehyde production; both are well-documented carcinogens. Moreover, tobacco exhibits the potential to alter the oral microbiome and induce dysbiotic conditions that lead to the onset of several oral and systemic diseases. Traditional cultivation approaches of microbiology provide partial information of microbial communities of a habitat; therefore, microbiomics has now been employed to study the metagenomes of entire microbial communities. In the past 5 years, few NGS-based investigations have revealed that SLT harbors four dominant phyla (Firmicutes, Proteobacteria, Actinobacteria, and Bacteroidetes) dominating Bacillus spp. and/or Pseudomonas spp. However, functional characterization of their genetic elements will be a more informative attribute to understand the correlation between inhabitant microbial diversity and their relatedness concerning abundance and diseases. This review provides an update on the microbial diversity of SLT and its associated attributes in human health. KEY POINTS: • Heavy microbial load on smokeless tobacco alarms for poor oral hygiene. • Inhabitant microorganisms of SLT participate in TSNA and biofilm formation. • SLTs alter the oral microbiome and causes oral dysbiosis.
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Affiliation(s)
- Akanksha Vishwakarma
- Department of Environmental Microbiology, Babasaheb Bhimrao Ambedkar University, Lucknow, Uttar Pradesh, 226025, India
| | - Digvijay Verma
- Department of Environmental Microbiology, Babasaheb Bhimrao Ambedkar University, Lucknow, Uttar Pradesh, 226025, India.
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Al-Ahmad A, Wollensak K, Rau S, Guevara Solarte DL, Paschke S, Lienkamp K, Staszewski O. How Do Polymer Coatings Affect the Growth and Bacterial Population of a Biofilm Formed by Total Human Salivary Bacteria?-A Study by 16S-RNA Sequencing. Microorganisms 2021; 9:1427. [PMID: 34361863 PMCID: PMC8304871 DOI: 10.3390/microorganisms9071427] [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: 04/01/2021] [Revised: 06/25/2021] [Accepted: 06/26/2021] [Indexed: 11/23/2022] Open
Abstract
Antimicrobial surface modifications are required to prevent biomaterial-associated biofilm infections, which are also a major concern for oral implants. The aim of this study was to evaluate the influence of three different coatings on the biofilm formed by human saliva. Biofilms grown from human saliva on three different bioactive poly(oxanorbornene)-based polymer coatings (the protein-repellent PSB: poly(oxanorbornene)-based poly(sulfobetaine), the protein-repellent and antimicrobial PZI: poly(carboxyzwitterion), and the mildly antimicrobial and protein-adhesive SMAMP: synthetic mimics of antimicrobial peptides) were analyzed and compared with the microbial composition of saliva, biofilms grown on uncoated substrates, and biofilms grown in the presence of chlorhexidine digluconate. It was found that the polymer coatings significantly reduced the amount of adherent bacteria and strongly altered the microbial composition, as analyzed by 16S RNA sequencing. This may hold relevance for maintaining oral health and the outcome of oral implants due to the existing synergism between the host and the oral microbiome. Especially the reduction of some bacterial species that are associated with poor oral health such as Tannerella forsythia and Fusobacterium nucleatum (observed for PSB and SMAMP), and Prevotella denticola (observed for all coatings) may positively modulate the oral biofilm, including in situ.
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Affiliation(s)
- Ali Al-Ahmad
- Medical Center, Department of Operative Dentistry and Periodontology, Faculty of Medicine, University of Freiburg, Hugstetter Strasse 55, 79106 Freiburg, Germany; (K.W.); (S.R.); (D.L.G.S.)
| | - Kira Wollensak
- Medical Center, Department of Operative Dentistry and Periodontology, Faculty of Medicine, University of Freiburg, Hugstetter Strasse 55, 79106 Freiburg, Germany; (K.W.); (S.R.); (D.L.G.S.)
- Bioactive Polymer Synthesis and Surface Engineering Group, Department of Microsystems Engineering (IMTEK) and Freiburg Center for Interactive Materials and Bioinspired Technologies (FIT), University of Freiburg, Georges-Köhler-Allee 105, 79110 Freiburg, Germany; (S.P.); (K.L.)
| | - Sibylle Rau
- Medical Center, Department of Operative Dentistry and Periodontology, Faculty of Medicine, University of Freiburg, Hugstetter Strasse 55, 79106 Freiburg, Germany; (K.W.); (S.R.); (D.L.G.S.)
| | - Diana Lorena Guevara Solarte
- Medical Center, Department of Operative Dentistry and Periodontology, Faculty of Medicine, University of Freiburg, Hugstetter Strasse 55, 79106 Freiburg, Germany; (K.W.); (S.R.); (D.L.G.S.)
| | - Stefan Paschke
- Bioactive Polymer Synthesis and Surface Engineering Group, Department of Microsystems Engineering (IMTEK) and Freiburg Center for Interactive Materials and Bioinspired Technologies (FIT), University of Freiburg, Georges-Köhler-Allee 105, 79110 Freiburg, Germany; (S.P.); (K.L.)
| | - Karen Lienkamp
- Bioactive Polymer Synthesis and Surface Engineering Group, Department of Microsystems Engineering (IMTEK) and Freiburg Center for Interactive Materials and Bioinspired Technologies (FIT), University of Freiburg, Georges-Köhler-Allee 105, 79110 Freiburg, Germany; (S.P.); (K.L.)
- Institut für Materialwissenschaft und Werkstoffkunde, Universität des Saarlandes, Campus, 66123 Saarbrücken, Germany
| | - Ori Staszewski
- Medical Center, Institute of Neuropathology, Faculty of Medicine, University of Freiburg, 79106 Freiburg, Germany;
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20
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Abdulhaq A, Halboub E, Homeida HE, Kumar Basode V, Ghzwani AH, Zain KA, Baraniya D, Chen T, Al-Hebshi NN. Tongue microbiome in children with autism spectrum disorder. J Oral Microbiol 2021; 13:1936434. [PMID: 34211637 PMCID: PMC8221129 DOI: 10.1080/20002297.2021.1936434] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Background: A few recent studies have characterized the salivary microbiome in association with Autism Spectrum Disorder (ASD). Here, we sought to assess if there is an association between the tongue microbiome and ASD. Methods: Tongue scrapping samples were obtained from 25 children with ASD and 38 neurotypical controls. The samples were sequenced for the 16S rRNA gene (V1-V3) and the resultant high-quality reads were assigned to the species-level using our previously described BLASTn-based algorithm. Downstream analyses of microbial profiles were conducted using QIIME, LEfSe, and R. Results: Independent of grouping, Prevotella, Streptococcus, Leptotrichia, Veillonella, Haemophilus and Rothia accounted for > 60% of the average microbiome. Haemophilus parainfluenzae, Rothia mucilaginosa, Prevotella melaninogenica and Neisseria flavescens/subflava were the most abundant species. Species richness and diversity did not significantly differ between the study groups. Thirteen species and three genera were differentially abundant between the two groups, e.g. enrichment of Actinomyces odontolyticus and Actinomyces lingnae and depletion of Campylobacter concisus and Streptococcus vestibularis in the ASD group. However, none of them withstood adjustment for multiple comparisons. Conclusion: The tongue microbiome of children with ASD was not significantly different from that of healthy control children, which is largely consistent with results from the literature.
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Affiliation(s)
- Ahmed Abdulhaq
- Department of Medical Laboratory Technology, College of Applied Medical Sciences, Jazan University, Jazan, Kingdom of Saudi Arabia
| | - Esam Halboub
- Department of Maxillofacial Surgery and Diagnostic Sciences, College of Dentistry, Jazan University, Jazan, Kingdom of Saudi Arabia.,Department of Oral Medicine, Oral Pathology and Oral Radiology, Faculty of Dentistry, Sana'a University, Yemen
| | - Husham E Homeida
- Department of Maxillofacial Surgery and Diagnostic Sciences, College of Dentistry, Jazan University, Jazan, Kingdom of Saudi Arabia
| | - Vinod Kumar Basode
- Department of Medical Laboratory Technology, College of Applied Medical Sciences, Jazan University, Jazan, Kingdom of Saudi Arabia
| | | | - Khalid Ammash Zain
- Medical Research Centre, Jazan University, Jazan, Kingdom of Saudi Arabia
| | - Divyashri Baraniya
- Department of Oral Health Sciences, Oral Microbiome Research Laboratory, Maurice H. Kornberg School of Dentistry, Temple University, Philadelphia, PA, USA
| | - Tsute Chen
- Department of Microbiology, Forsyth Institute, Cambridge, MA, USA
| | - Nezar Noor Al-Hebshi
- Department of Oral Health Sciences, Oral Microbiome Research Laboratory, Maurice H. Kornberg School of Dentistry, Temple University, Philadelphia, PA, USA
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21
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Mughal MJ, Kwok HF. Multidimensional role of bacteria in cancer: Mechanisms insight, diagnostic, preventive and therapeutic potential. Semin Cancer Biol 2021; 86:1026-1044. [PMID: 34119644 DOI: 10.1016/j.semcancer.2021.06.011] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2021] [Revised: 05/28/2021] [Accepted: 06/08/2021] [Indexed: 02/08/2023]
Abstract
The active role of bacteria in oncogenesis has long been a topic of debate. Although, it was speculated to be a transmissible cause of cancer as early as the 16th-century, yet the idea about the direct involvement of bacteria in cancer development has only been explored in recent decades. More recently, several studies have uncovered the mechanisms behind the carcinogenic potential of bacteria which are inflammation, immune evasion, pro-carcinogenic metabolite production, DNA damage and genomic instability. On the other side, the recent development on the understanding of tumor microenvironment and technological advancements has turned this enemy into an ally. Studies using bacteria for cancer treatment and detection have shown noticeable effects. Therapeutic abilities of bioengineered live bacteria such as high specificity, selective cytotoxicity to cancer cells, responsiveness to external signals and control after ingestion have helped to overcome the challenges faced by conventional cancer therapies and highlighted the bacterial based therapy as an ideal approach for cancer treatment. In this review, we have made an effort to compile substantial evidence to support the multidimensional role of bacteria in cancer. We have discussed the multifaceted role of bacteria in cancer by highlighting the wide impact of bacteria on different cancer types, their mechanisms of actions in inducing carcinogenicity, followed by the diagnostic and therapeutic potential of bacteria in cancers. Moreover, we have also highlighted the existing gaps in the knowledge of the association between bacteria and cancer as well as the limitation and advantage of bacteria-based therapies in cancer. A better understanding of these multidimensional roles of bacteria in cancer can open up the new doorways to develop early detection strategies, prevent cancer, and develop therapeutic tactics to cure this devastating disease.
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Affiliation(s)
- Muhammad Jameel Mughal
- Cancer Centre, Faculty of Health Sciences, University of Macau, Avenida de Universidade, Taipa, Macau
| | - Hang Fai Kwok
- Cancer Centre, Faculty of Health Sciences, University of Macau, Avenida de Universidade, Taipa, Macau; MOE Frontiers Science Center for Precision Oncology, University of Macau, Avenida de Universidade, Taipa, Macau.
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22
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Sajid M, Srivastava S, Joshi L, Bharadwaj M. Impact of smokeless tobacco-associated bacteriome in oral carcinogenesis. Anaerobe 2021; 70:102400. [PMID: 34090995 DOI: 10.1016/j.anaerobe.2021.102400] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2021] [Revised: 05/06/2021] [Accepted: 06/01/2021] [Indexed: 01/20/2023]
Abstract
Smokeless tobacco products possess a complex community of microorganisms. The microbial community ferment compounds present in the smokeless tobacco products and convert them into carcinogens like tobacco-associated nitrosamines. However, the potential of smokeless tobacco products associated bacteriome to manipulate systemic inflammation and other signaling pathways involved in the etiology of oral cancer will be a risk factor for oral cancer. Further, damage to oral epithelial cells causes a leaky oral layer that leads to increased infiltration of bacterial components like lipopolysaccharide, flagellin, and toxins, etc. The consumption of smokeless tobacco products can cause damage to the oral layer and dysbiosis of oral microbiota. Hence, the enrichment of harmful microbes due to dysbiosis in the oral cavity can produce high levels of bacterial metabolites and provoke inflammation as well as carcinogenesis. Understanding the complex and dynamic interrelation between the smokeless tobacco-linked bacteriome and host oral microbiome may help to unravel the mechanism of oral carcinogenesis stimulated by smokeless tobacco products. This review provides an insight into smokeless tobacco product-associated bacteriome and their potential in the progression of oral cancer. In the future, this will guide in the evolution of prevention and treatment strategies against smokeless tobacco products-induced oral cancer. Besides, it will assist the government organizations for better management and cessation policy building for the worldwide problem of smokeless tobacco addiction.
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Affiliation(s)
- Mohammad Sajid
- Molecular Genetics and Biochemistry, National Institute of Cancer Prevention and Research, Indian Council of Medical Research (ICMR), Sector-39, Noida, 201301, India
| | - Sonal Srivastava
- Molecular Genetics and Biochemistry, National Institute of Cancer Prevention and Research, Indian Council of Medical Research (ICMR), Sector-39, Noida, 201301, India
| | - Lata Joshi
- Molecular Genetics and Biochemistry, National Institute of Cancer Prevention and Research, Indian Council of Medical Research (ICMR), Sector-39, Noida, 201301, India
| | - Mausumi Bharadwaj
- Molecular Genetics and Biochemistry, National Institute of Cancer Prevention and Research, Indian Council of Medical Research (ICMR), Sector-39, Noida, 201301, India.
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23
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Rivera AJ, Tyx RE. Microbiology of the American Smokeless Tobacco. Appl Microbiol Biotechnol 2021; 105:4843-4853. [PMID: 34110473 PMCID: PMC8190171 DOI: 10.1007/s00253-021-11382-z] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2021] [Revised: 05/17/2021] [Accepted: 05/28/2021] [Indexed: 12/23/2022]
Abstract
Smokeless tobacco products (STP) contain diverse microbial communities that contribute to the formation of harmful chemical byproducts. This is concerning since 300 million individuals around the globe are users of smokeless tobacco. Significant evidence has shown that microbial metabolic activities mediate the formation of carcinogens during manufacturing. In recent years, studies have revealed a series of additional health impacts that include lesions and inflammation of the oral mucosa and the gastrointestinal tract, as well as alterations of the endogenous microbiota. These findings are due to recent developments in molecular technologies that allowed researchers to better examine the microbial component of these products. This new information illustrates the scale of the STP microbiota and its diversity in the finished product that is sold for consumption. Additionally, the application of metagenomics and metatranscriptomics has provided the tools to look at phylogenies across bacterial, viral, and eukaryotic groups, their functional capacities, and viability. Here we present key examples of tobacco microbiology research that utilizes newer approaches and strategies to define the microbial component of smokeless tobacco products. We also highlight challenges in these approaches, the knowledge gaps being filled, and those gaps that warrant further study. A better understanding of the microbiology of STP brings vast public health benefits. It will provide important information for the product consumer, impact manufacturing practices, and provide support for the development of attainable and more meaningful regulatory goals. KEY POINTS: Newer technologies allowed quicker and more comprehensive identification of microbes in tobacco samples, encapsulating microorganisms difficult or impossible to culture. Current research in smokeless tobacco microbiology is filling knowledge gaps previously unfilled due to the lack of suitable approaches. The microbial ecology of smokeless tobacco presents a clearer picture of diversity and variability not considered before.
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Affiliation(s)
- A J Rivera
- Centers for Disease Control and Prevention, 4770 Buford Highway, NE M.S. S110-03, Atlanta, GA, 30341-3717, USA.
| | - R E Tyx
- Centers for Disease Control and Prevention, 4770 Buford Highway, NE M.S. S110-03, Atlanta, GA, 30341-3717, USA
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24
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Chattopadhyay S, Malayil L, Mongodin EF, Sapkota AR. A roadmap from unknowns to knowns: Advancing our understanding of the microbiomes of commercially available tobacco products. Appl Microbiol Biotechnol 2021; 105:2633-2645. [PMID: 33704513 PMCID: PMC7948171 DOI: 10.1007/s00253-021-11183-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2020] [Revised: 02/10/2021] [Accepted: 02/14/2021] [Indexed: 01/03/2023]
Abstract
Tobacco smoking is still the leading cause of preventable diseases and death in the USA and throughout the globe. Under Section 904(a)(3) of the US Federal Food, Drug, and Cosmetic Act, tobacco manufacturing companies need to report on quantities of harmful and potentially harmful constituents (HPHCs) in all tobacco products. While the extensive HPHC list of 2012 includes 93 chemicals, which are categorized as carcinogenic, respiratory, cardiovascular, or reproductive toxicants or addictive compounds, it fails to include microorganisms (bacteria and fungi) that have been shown to contribute to adverse health outcomes among tobacco users. Nevertheless, over the last 50 years, researchers have studied microorganisms in a variety of tobacco products using both culture-based and culture-independent techniques. In this mini-review, we provide an overview of this body of research, detailing the bacterial and fungal microbiomes residing in commercial tobacco products. Overall, studies have characterized over 89 unique bacterial genera and 19 fungal genera in cigarettes, cigars, cigarillos, hookah, and smokeless tobacco. The most predominant bacterial genera are Bacillus, Pseudomonas, and Staphylococcus. Fungal genera identified have included Aspergillus, Penicillium, Mucor, Alternaria, Cladosporium, Streptomyces, and Candida, to name a few. While some of the identified microorganisms are known human pathogens, others are potential opportunistic pathogens. Given the vast array of microorganisms that are present across diverse types of tobacco products, future research should be focused on the viability of these microorganisms, as well as their ability to transfer to the user's respiratory tract, potentially contributing to adverse health outcomes. KEY POINTS: • Commercial tobacco products harbor diverse bacterial and fungal communities. • Some of these microorganisms are known or opportunistic human pathogens. • Research on their viability and transmission to users' respiratory tracts is needed.
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Affiliation(s)
- Suhana Chattopadhyay
- Maryland Institute for Applied Environmental Health, University of Maryland School of Public Health, College Park, MD, 20742, USA
| | - Leena Malayil
- Maryland Institute for Applied Environmental Health, University of Maryland School of Public Health, College Park, MD, 20742, USA
| | - Emmanuel F Mongodin
- Institute for Genome Sciences and Department of Microbiology and Immunology, University of Maryland School of Medicine, Baltimore, MD, 21201, USA
- Division of Lung Diseases, National Institutes of Health (NIH), National Heart, Lung and Blood Institute (NHLBI), Bethesda, MD, USA
| | - Amy R Sapkota
- Maryland Institute for Applied Environmental Health, University of Maryland School of Public Health, College Park, MD, 20742, USA.
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25
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Zhao J, Qiao L, Shang P, Hua C, Xie Y, Li X, Ding M, Liu K, Guo J, Zhao G, Wang S, Liu H, Xie F. Effects of smokeless tobacco on cell viability, reactive oxygen species, apoptosis, and inflammatory cytokines in human umbilical vein endothelial cells. Toxicol Mech Methods 2021; 31:349-358. [PMID: 33467949 DOI: 10.1080/15376516.2021.1876800] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Smokeless tobacco products provide an alternative to cigarettes; however, smokeless tobacco is carcinogenic and harmful to human health. This study evaluated the toxicological effects of snus extracts and cigarette smoke total particulate matter (TPM) on human umbilical vein endothelial cells (HUVECs). Treated cells were examined for cell viability, reactive oxygen species (ROS), apoptosis, and inflammatory cytokines. Moreover, we explored the mechanism of programmed cell death induced by snus. The results showed that snus extracts significantly inhibited cell viability in a dose-dependent manner. ROS was significantly increased in treatment groups, and anti-oxidant treatment could not prevent snus extract-induced cell death. Snus extracts induced apoptosis, DNA damage, activation and cleavage of caspase-3 and caspase-8, pathway-related gene change, and interleukin (IL)-6 and IL-8 release in HUVECs. Snus extracts exposure may induce cytotoxicity, ROS generation, inflammatory cytokines release, and apoptosis or DNA damage through intrinsic and extrinsic pathways in HUVECs.
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Affiliation(s)
- Junwei Zhao
- Key Laboratory of Tobacco Chemistry, Zhengzhou Tobacco Research Institute of CNTC, Zhengzhou, China
| | - Liangjun Qiao
- College of Basic Medicine, Chongqing Medical University, Chongqing, China
| | - Pingping Shang
- Key Laboratory of Tobacco Chemistry, Zhengzhou Tobacco Research Institute of CNTC, Zhengzhou, China
| | - Chenfeng Hua
- Key Laboratory of Tobacco Chemistry, Zhengzhou Tobacco Research Institute of CNTC, Zhengzhou, China
| | - Yuming Xie
- Zhengzhou Foreign Language School, Zhengzhou, China
| | - Xiang Li
- Key Laboratory of Tobacco Chemistry, Zhengzhou Tobacco Research Institute of CNTC, Zhengzhou, China
| | - Meizhou Ding
- Technology Center of China Tobacco Henan Industrial Co., Ltd, Zhengzhou, China
| | - Kejian Liu
- Key Laboratory of Tobacco Chemistry, Zhengzhou Tobacco Research Institute of CNTC, Zhengzhou, China
| | - Junwei Guo
- Key Laboratory of Tobacco Chemistry, Zhengzhou Tobacco Research Institute of CNTC, Zhengzhou, China
| | - Ge Zhao
- Key Laboratory of Tobacco Chemistry, Zhengzhou Tobacco Research Institute of CNTC, Zhengzhou, China
| | - Sheng Wang
- Key Laboratory of Tobacco Chemistry, Zhengzhou Tobacco Research Institute of CNTC, Zhengzhou, China
| | - Huimin Liu
- Key Laboratory of Tobacco Chemistry, Zhengzhou Tobacco Research Institute of CNTC, Zhengzhou, China
| | - Fuwei Xie
- Key Laboratory of Tobacco Chemistry, Zhengzhou Tobacco Research Institute of CNTC, Zhengzhou, China
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26
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Rivera AJ, Tyx RE, Keong LM, Stanfill SB, Watson CH. Microbial communities and gene contributions in smokeless tobacco products. Appl Microbiol Biotechnol 2020; 104:10613-10629. [PMID: 33180172 PMCID: PMC7849185 DOI: 10.1007/s00253-020-10999-w] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2020] [Revised: 10/29/2020] [Accepted: 11/03/2020] [Indexed: 02/05/2023]
Abstract
Smokeless tobacco products (STP) contain bacteria, mold, and fungi due to exposure from surrounding environments and tobacco processing. This has been a cause for concern since the presence of microorganisms has been linked to the formation of highly carcinogenic tobacco-specific nitrosamines. These communities have also been reported to produce toxins and other pro-inflammatory molecules that can cause mouth lesions and elicit inflammatory responses in STP users. Moreover, microbial species in these products could transfer to the mouth and gastrointestinal tract, potentially altering the established respective microbiotas of the consumer. Here, we present the first metagenomic analysis of select smokeless tobacco products, specifically US domestic moist and dry snuff. Bacterial, eukaryotic, and viral species were found in all tobacco products where 68% of the total species was comprised of Bacteria with 3 dominant phyla but also included 32% Eukarya and 1% share abundance for Archaea and Viruses. Furthermore, 693,318 genes were found to be present and included nitrate and nitrite reduction and transport enzymes, antibiotic resistance genes associated with resistance to vancomycin, β-lactamases, their derivatives, and other antibiotics, as well as genes encoding multi-drug transporters and efflux pumps. Additional analyses showed the presence of endo- and exotoxin genes in addition to other molecules associated with inflammatory responses. Our results present a novel aspect of the smokeless tobacco microbiome and provide a better understanding of these products' microbiology. KEY POINTS: • The findings presented will help understand microbial contributions to overall STP chemistries. • Gene function categorization reveals harmful constituents outside canonical forms. • Pathway genes for TSNA precursor activity may occur at early stages of production. • Bacteria in STPs carry antibiotic resistance genes and gene transfer mechanisms.
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Affiliation(s)
- A J Rivera
- Division of Laboratory Sciences, Centers for Disease Control and Prevention, 4770 Buford Highway, NE MS 110-03, Atlanta, GA, 30341-3717, USA.
| | - R E Tyx
- Division of Laboratory Sciences, Centers for Disease Control and Prevention, 4770 Buford Highway, NE MS 110-03, Atlanta, GA, 30341-3717, USA
| | - L M Keong
- Battelle Analytical Services, Atlanta, GA, USA
- Influenza Division, Centers for Disease Control and Prevention, Atlanta, GA, USA
| | - S B Stanfill
- Division of Laboratory Sciences, Centers for Disease Control and Prevention, 4770 Buford Highway, NE MS 110-03, Atlanta, GA, 30341-3717, USA
| | - C H Watson
- Division of Laboratory Sciences, Centers for Disease Control and Prevention, 4770 Buford Highway, NE MS 110-03, Atlanta, GA, 30341-3717, USA
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27
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Frid P, Baraniya D, Halbig J, Rypdal V, Songstad NT, Rosèn A, Berstad JR, Flatø B, Alakwaa F, Gil EG, Cetrelli L, Chen T, Al-Hebshi NN, Nordal E, Al-Haroni M. Salivary Oral Microbiome of Children With Juvenile Idiopathic Arthritis: A Norwegian Cross-Sectional Study. Front Cell Infect Microbiol 2020; 10:602239. [PMID: 33251163 PMCID: PMC7672027 DOI: 10.3389/fcimb.2020.602239] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2020] [Accepted: 10/09/2020] [Indexed: 02/06/2023] Open
Abstract
Background The oral microbiota has been connected to the pathogenesis of rheumatoid arthritis through activation of mucosal immunity. The objective of this study was to characterize the salivary oral microbiome associated with juvenile idiopathic arthritis (JIA), and correlate it with the disease activity including gingival inflammation. Methods Fifty-nine patients with JIA (mean age, 12.6 ± 2.7 years) and 34 healthy controls (HC; mean age 12.3 ± 3.0 years) were consecutively recruited in this Norwegian cross-sectional study. Information about demographics, disease activity, medication history, frequency of tooth brushing and a modified version of the gingival bleeding index (GBI) and the simplified oral hygiene index (OHI-S) was obtained. Microbiome profiling of saliva samples was performed by sequencing of the V1-V3 region of the 16S rRNA gene, coupled with a species-level taxonomy assignment algorithm; QIIME, LEfSe and R-package for Spearman correlation matrix were used for downstream analysis. Results There were no significant differences between JIA and HC in alpha- and beta-diversity. However, differential abundance analysis revealed several taxa to be associated with JIA: TM7-G1, Solobacterium and Mogibacterium at the genus level; and Leptotrichia oral taxon 417, TM7-G1 oral taxon 352 and Capnocytophaga oral taxon 864 among others, at the species level. Haemophilus species, Leptotrichia oral taxon 223, and Bacillus subtilis, were associated with healthy controls. Gemella morbillorum, Leptotrichia sp. oral taxon 498 and Alloprevotella oral taxon 914 correlated positively with the composite juvenile arthritis 10-joint disease activity score (JADAS10), while Campylobacter oral taxon 44 among others, correlated with the number of active joints. Of all microbial markers identified, only Bacillus subtilis and Campylobacter oral taxon 44 maintained false discovery rate (FDR) < 0.1. Conclusions In this exploratory study of salivary oral microbiome we found similar alpha- and beta-diversity among children with JIA and healthy. Several taxa associated with chronic inflammation were found to be associated with JIA and disease activity, which warrants further investigation.
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Affiliation(s)
- Paula Frid
- Department of ENT, Division of Oral and Maxillofacial Surgery, University Hospital North Norway, Tromsø, Norway.,Public Dental Service Competence Centre of North Norway, Tromsø, Norway.,Department of Clinical Medicine, UiT the Arctic University of Norway, Tromsø, Norway
| | - Divyashri Baraniya
- Oral Microbiome Laboratory, Kornberg School of Dentistry, Temple University, Philadelphia, PA, United States
| | - Josefine Halbig
- Public Dental Service Competence Centre of North Norway, Tromsø, Norway.,Department of Clinical Dentistry, UiT the Arctic University of Norway, Tromsø, Norway
| | - Veronika Rypdal
- Department of Clinical Medicine, UiT the Arctic University of Norway, Tromsø, Norway.,Department of Pediatrics and Adolescence Medicine, University Hospital of North Norway, Tromsø, Norway
| | - Nils Thomas Songstad
- Department of Pediatrics and Adolescence Medicine, University Hospital of North Norway, Tromsø, Norway
| | - Annika Rosèn
- Department of Clinical Dentistry, University of Bergen, Bergen, Norway.,Department of Oral and Maxillofacial Surgery, Haukeland University Hospital, Bergen, Norway
| | - Johanna Rykke Berstad
- Department of ENT, Division of Oral and Maxillofacial Surgery, Oslo University Hospital, Oslo, Norway
| | - Berit Flatø
- Department of Rheumatology and Infectious Diseases, Institute of Clinical Medicine, University of Oslo, Oslo, Norway.,Department of Rheumatology, Oslo University Hospital, Oslo, Norway
| | - Fadhl Alakwaa
- Department of Computational Medicine and Bioinformatics, University Michigan, Ann Arbor, MI, United States
| | | | - Lena Cetrelli
- Center of Oral Health Services and Research (TkMidt), Trondheim, Norway
| | - Tsute Chen
- Department of Microbiology, Forsyth Institute, Cambridge, MA, United States
| | - Nezar Noor Al-Hebshi
- Oral Microbiome Laboratory, Kornberg School of Dentistry, Temple University, Philadelphia, PA, United States
| | - Ellen Nordal
- Department of Clinical Medicine, UiT the Arctic University of Norway, Tromsø, Norway.,Department of Pediatrics and Adolescence Medicine, University Hospital of North Norway, Tromsø, Norway
| | - Mohammed Al-Haroni
- Department of Clinical Dentistry, UiT the Arctic University of Norway, Tromsø, Norway
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28
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Pulmonary Alterations Among Workers in a Dental Prosthesis Laboratory: Exploring High Dust Concentrations and Novel Findings of Bacterial Genera in the Workplace to Achieve Improved Control. J Occup Environ Med 2020; 62:930-936. [PMID: 32796256 DOI: 10.1097/jom.0000000000001995] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
OBJECTIVE To evaluate the pulmonary alterations in workers from a dental prosthesis laboratory and explore dust and bacterial dissemination generated in the laboratory. METHODS Spirometry and computerized axial tomography were performed on 67 workers. Dust in workplace air was determined using the filtration-gravimetric method, and bacterial detection was explored using 16S rDNA gene sequencing. RESULTS Pulmonary alterations were detected in 37% of the workers. Airborne dust concentrations were determined to be higher than the maximum permissible exposure limit, and bacterial detection analysis revealed 23 bacterial genera. The most frequently detected bacterial genus was Sphingomonas sp., which has been described as microbiota associated with disease of the oral cavity. CONCLUSIONS The results of this study highlight the importance of the implementation of biosecurity measures, improvement of ventilation systems, and routine disinfection of dental impressions.
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29
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Halboub E, Al-Ak'hali MS, Alamir AH, Homeida HE, Baraniya D, Chen T, Al-Hebshi NN. Tongue microbiome of smokeless tobacco users. BMC Microbiol 2020; 20:201. [PMID: 32640977 PMCID: PMC7346439 DOI: 10.1186/s12866-020-01883-8] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2020] [Accepted: 06/26/2020] [Indexed: 01/13/2023] Open
Abstract
Background The possibility that smokeless tobacco may contribute to oral carcinogenesis by influencing the oral microbiome has not been explored. This preliminary cross-sectional study sought to assess the effect of using shammah, a form of smokeless tobacco prevalent in Arabia, on the tongue microbiome. Tongue scarping samples were obtained from 29 shammah users (SU; 27.34 ± 6.9 years) and 23 shammah non-users (SNU; 27.7 ± 7.19 years) and analyzed with 16S rRNA gene sequencing (V1-V3). Species-level taxonomy assignment of the high-quality, merged reads was obtained using a previously described BLASTn-based algorithm. Downstream analyses were performed with QIIME, LEfSe, and R. Results A total of 178 species, belonging to 62 genera and 8 phyla were identified. Genera Streptococcus, Leptotrichia, Actinomyces, Veillonella, Haemophilus, Prevotella and Neisseria accounted for more than 60% of the average microbiome. There were no differences between the two groups in species richness and alpha-diversity, but PCoA showed significant separation (P = 0.015, ANOSIM). LEfSe analysis identified 22 species to be differentially abundant between the SU and SNU. However, only 7 species maintained a false discovery rate of ≤0.2 and could cluster the two groups separately: Rothia mucilaginosa, Streptococcus sp. oral taxon 66, Actinomyces meyeri, Streptococcus vestibularis Streptococcus sanguinis and a potentially novel Veillonella species in association with SU, and Oribacterium asaccharolyticum with SNU. Conclusion These preliminary results indicate that shammah use induces tongue microbiome changes including enrichment of several species with high acetaldehyde production potential, which warrants further investigation.
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Affiliation(s)
- Esam Halboub
- Department of Maxillofacial Surgery and Diagnostic Sciences, College of Dentistry, Jazan University, Jazan, Saudi Arabia. .,Department of Oral Medicine, Oral Pathology and Oral Radiology, Faculty of Dentistry, Sana'a university, Sana'a, Yemen.
| | - Mohammed S Al-Ak'hali
- Department of Preventive Dental Sciences, College of Dentistry, Jazan University, Jazan, Saudi Arabia.,Department of Periodontology, Faculty of Dentistry, Sana'a University, Sana'a, Yemen
| | - Abdulwahab H Alamir
- Department of Maxillofacial Surgery and Diagnostic Sciences, College of Dentistry, Jazan University, Jazan, Saudi Arabia
| | - Husham E Homeida
- Department of Maxillofacial Surgery and Diagnostic Sciences, College of Dentistry, Jazan University, Jazan, Saudi Arabia
| | - Divyashri Baraniya
- Oral Microbiome Research Laboratory, Department of Oral Health Sciences, Maurice H. Kornberg School of Dentistry, Temple University, Philadelphia, PA, USA
| | - Tsute Chen
- Department of Microbiology, Forsyth Institute, Cambridge, MA, USA
| | - Nezar Noor Al-Hebshi
- Oral Microbiome Research Laboratory, Department of Oral Health Sciences, Maurice H. Kornberg School of Dentistry, Temple University, Philadelphia, PA, USA.
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Liu C, Li L, Xie J, Coulter JA, Zhang R, Luo Z, Cai L, Wang L, Gopalakrishnan S. Soil Bacterial Diversity and Potential Functions Are Regulated by Long-Term Conservation Tillage and Straw Mulching. Microorganisms 2020; 8:microorganisms8060836. [PMID: 32498450 PMCID: PMC7355473 DOI: 10.3390/microorganisms8060836] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2020] [Revised: 05/25/2020] [Accepted: 05/30/2020] [Indexed: 12/23/2022] Open
Abstract
Soil physiochemical properties are regulated by cropping practices, but little is known about how tillage influences soil microbial community diversity and functions. Here, we assessed soil bacterial community assembly and functional profiles in relation to tillage. Soils, collected in 2018 from a 17-year field experiment in northwestern China, were analyzed using high-throughput sequencing and the PICRUSt approach. The taxonomic diversity of bacterial communities was dominated primarily by the phyla Proteobacteria (32–56%), Bacteroidetes (12–33%), and Actinobacteria (17–27%). Alpha diversity (Chao1, Shannon, Simpson, and operational taxonomic unit (OTU) richness) was highest under no-tillage with crop residue removed (NT). Crop residue retention on the soil surface (NTS) or incorporated into soil (TS) promoted the abundance of Proteobacteria by 16 to 74% as compared to conventional tillage (T). Tillage practices mainly affected the pathways of soil metabolism, genetic information processing, and environmental information processing. Soil organic C and NH4–N were the principal contributors to the diversity and composition of soil microbiota, whereas soil pH, total nitrogen, total P, and moisture had little effect. Our results suggest that long-term conservation practices with no-tillage and crop residue retention shape soil bacterial community composition through modifying soil physicochemical properties and promoting the metabolic function of soil microbiomes.
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Affiliation(s)
- Chang Liu
- Gansu Provincial Key Laboratory of Aridland Crop Science, Gansu Agricultural University, Lanzhou 730070, China; (C.L.); (J.X.); (R.Z.); (Z.L.); (L.C.); (L.W.)
- College of Agronomy, Gansu Agricultural University, Lanzhou 730070, China
| | - Lingling Li
- Gansu Provincial Key Laboratory of Aridland Crop Science, Gansu Agricultural University, Lanzhou 730070, China; (C.L.); (J.X.); (R.Z.); (Z.L.); (L.C.); (L.W.)
- College of Agronomy, Gansu Agricultural University, Lanzhou 730070, China
- Correspondence:
| | - Junhong Xie
- Gansu Provincial Key Laboratory of Aridland Crop Science, Gansu Agricultural University, Lanzhou 730070, China; (C.L.); (J.X.); (R.Z.); (Z.L.); (L.C.); (L.W.)
- College of Agronomy, Gansu Agricultural University, Lanzhou 730070, China
| | - Jeffrey A. Coulter
- Department of Agronomy and Plant Genetics, University of Minnesota, St. Paul, MN 55108, USA;
| | - Renzhi Zhang
- Gansu Provincial Key Laboratory of Aridland Crop Science, Gansu Agricultural University, Lanzhou 730070, China; (C.L.); (J.X.); (R.Z.); (Z.L.); (L.C.); (L.W.)
- College of Resource and Environment, Gansu Agricultural University, Lanzhou 730070, China
| | - Zhuzhu Luo
- Gansu Provincial Key Laboratory of Aridland Crop Science, Gansu Agricultural University, Lanzhou 730070, China; (C.L.); (J.X.); (R.Z.); (Z.L.); (L.C.); (L.W.)
- College of Resource and Environment, Gansu Agricultural University, Lanzhou 730070, China
| | - Liqun Cai
- Gansu Provincial Key Laboratory of Aridland Crop Science, Gansu Agricultural University, Lanzhou 730070, China; (C.L.); (J.X.); (R.Z.); (Z.L.); (L.C.); (L.W.)
- College of Resource and Environment, Gansu Agricultural University, Lanzhou 730070, China
| | - Linlin Wang
- Gansu Provincial Key Laboratory of Aridland Crop Science, Gansu Agricultural University, Lanzhou 730070, China; (C.L.); (J.X.); (R.Z.); (Z.L.); (L.C.); (L.W.)
- College of Agronomy, Gansu Agricultural University, Lanzhou 730070, China
| | - Subramaniam Gopalakrishnan
- International Crops Research Institute for the Semi-Arid Tropics (ICRISAT), Patancheru, Hyderabad, Telangana 502324, India;
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Zimta AA, Tigu AB, Braicu C, Stefan C, Ionescu C, Berindan-Neagoe I. An Emerging Class of Long Non-coding RNA With Oncogenic Role Arises From the snoRNA Host Genes. Front Oncol 2020; 10:389. [PMID: 32318335 PMCID: PMC7154078 DOI: 10.3389/fonc.2020.00389] [Citation(s) in RCA: 87] [Impact Index Per Article: 21.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2019] [Accepted: 03/04/2020] [Indexed: 12/24/2022] Open
Abstract
The small nucleolar RNA host genes (SNHGs) are a group of long non-coding RNAs, which are reported in many studies as being overexpressed in various cancers. With very few exceptions, the SNHGs (SNHG1, SNHG3, SNHG5, SNHG6, SNHG7, SNHG12, SNHG15, SNHG16, SNHG20) are recognized as inducing increased proliferation, cell cycle progression, invasion, and metastasis of cancer cells, which makes this class of transcripts a viable biomarker for cancer development and aggressiveness. Through our literature research, we also found that silencing of SNHGs through small interfering RNAs or short hairpin RNAs is very effective in both in vitro and in vivo experiments by lowering the aggressiveness of solid cancers. The knockdown of SNHG as a new cancer therapeutic option should be investigated more in the future.
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Affiliation(s)
- Alina-Andreea Zimta
- Medfuture Research Center for Advanced Medicine, Iuliu Hatieganu University of Medicine and Pharmacy, Cluj-Napoca, Romania
| | - Adrian Bogdan Tigu
- Medfuture Research Center for Advanced Medicine, Iuliu Hatieganu University of Medicine and Pharmacy, Cluj-Napoca, Romania
| | - Cornelia Braicu
- Research Center for Functional Genomics, Biomedicine and Translational Medicine, Iuliu Hatieganu University of Medicine and Pharmacy, Cluj-Napoca, Romania
| | - Cristina Stefan
- African Organisation for Research and Training in Cancer, Cape Town, South Africa
| | - Calin Ionescu
- Surgical Department, Municipal Hospital, Cluj-Napoca, Romania
- Department of Surgery, Iuliu Hatieganu University of Medicine and Pharmacy, Cluj-Napoca, Romania
| | - Ioana Berindan-Neagoe
- Medfuture Research Center for Advanced Medicine, Iuliu Hatieganu University of Medicine and Pharmacy, Cluj-Napoca, Romania
- Research Center for Functional Genomics, Biomedicine and Translational Medicine, Iuliu Hatieganu University of Medicine and Pharmacy, Cluj-Napoca, Romania
- Department of Functional Genomics and Experimental Pathology, The Oncology Institute “Prof. Dr. I. Chiricuta”, Cluj-Napoca, Romania
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Monika S, Dineshkumar T, Priyadharini S, Niveditha T, Sk P, Rajkumar K. Smokeless Tobacco Products (STPs) Harbour Bacterial Populations with Potential for Oral Carcinogenicity. Asian Pac J Cancer Prev 2020; 21:815-824. [PMID: 32212812 PMCID: PMC7437332 DOI: 10.31557/apjcp.2020.21.3.815] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2019] [Indexed: 11/25/2022] Open
Abstract
INTRODUCTION Smokeless Tobacco Products (STPs) vary significantly in their carcinogenicity, a feature accredited to the variation in the concentrations of carcinogenic chemicals. Tobacco associated bacteria are known to produce Tobacco-specific N-nitrosamines (TSNAs) and hence are determinants of TSNA levels in Tobacco. The primary objective of this study was to conduct a microbiological survey of STPs and to provide a baseline information of the bacterial communities present in the STPs. MATERIALS AND METHODS The present study analyzed the constituency of microbial communities in 7 different smokeless Tobacco products including four chewable (T1_CW to T4_CW), two snus (T5_Snus and T6_Snus) and one snuff sample (T7_Snuff) using high-throughput sequencing of the 16S rRNA based next generation sequencing. The Tobacco samples were also analyzed for pH and moisture content. Statistical analysis of the data obtained was done using SPSS software version 20. Pearson's Correlation was done to analyze the correlation between pH and moisture content of the Tobacco samples. RESULTS A total of 11 phyla were identified in all smokeless Tobacco products. A total of 36 classes were identified across all smokeless Tobacco products and bacilli was the predominant class in all the products followed by Actinobacteria and Bacteroidia. In species level, a total of 2369 species were identified across all smokeless Tobacco products. In T1 chewable Tobacco products, predominant species was staphylococcus whereas in T2 and T3, Bacillus subtilis and pumilus were predominant. In T4 chewable Tobacco product, Virgibacillus was predominant followed by halodentrificans, staphylococcus epidermidis. In snus 1 and 2, Bacillus pumilus and subtilis were predominant. In snuff, Bacillus cereus was predominant. Snus products had the highest moisture content (15.4% and 14.3%) compared to the chewable Tobacco and snuff products. The snus products analyzed had alkaline values (pH 8.50 and 8.15) and snuff and chewable Tobacco had acidic values ranging from 5.62 to 6.09. CONCLUSION The current study demonstrates that ST products differ qualitatively, quantitatively, and in their bacterial composition. There is a possibility that some of these species may contribute to oral carcinogenesis, either by influencing levels of TSNAs or directly inducing chronic inflammation.
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Affiliation(s)
- Srivastav Monika
- Department of Oral Pathology and Microbiology, SRM Dental College, Ramapuram, SRM Institute of Science and Technology, Chennai, Tamil Nadu, India
| | - Thayalan Dineshkumar
- Department of Oral Pathology and Microbiology, SRM Dental College, Ramapuram, SRM Institute of Science and Technology, Chennai, Tamil Nadu, India
| | - Shankaran Priyadharini
- Department of Oral Pathology and Microbiology, SRM Dental College, Ramapuram, SRM Institute of Science and Technology, Chennai, Tamil Nadu, India
| | - Thampan Niveditha
- Department of Oral Pathology and Microbiology, SRM Dental College, Ramapuram, SRM Institute of Science and Technology, Chennai, Tamil Nadu, India
| | - Priyadharshini Sk
- Department of Oral Pathology and Microbiology, SRM Dental College, Ramapuram, SRM Institute of Science and Technology, Chennai, Tamil Nadu, India
| | - Krishnan Rajkumar
- Department of Oral Pathology and Microbiology, SRM Dental College, Ramapuram, SRM Institute of Science and Technology, Chennai, Tamil Nadu, India
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Baraniya D, Chen T, Nahar A, Alakwaa F, Hill J, Tellez M, Ismail A, Puri S, Al-Hebshi NN. Supragingival mycobiome and inter-kingdom interactions in dental caries. J Oral Microbiol 2020; 12:1729305. [PMID: 32158514 PMCID: PMC7048226 DOI: 10.1080/20002297.2020.1729305] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2019] [Revised: 01/09/2020] [Accepted: 01/13/2020] [Indexed: 01/06/2023] Open
Abstract
Background: Recent studies have reveled the presence of a complex fungal community (mycobiome) in the oral cavity. However, the role of oral mycobiome in dental caries and its interaction with caries-associated bacteria is not yet clear. Methods: Whole-mouth supragingival plaque samples from 30 children (6–10 years old) with no caries, early caries, or advanced caries were sequenced for internal transcribed spacer 2 (ITS-2). The mycobiome profiles were correlated with previously published bacteriome counterparts. Interaction among selected fungal and bacterial species was assessed by co-culture or spent media experiments. Results: Fungal load was extremely low. Candida, Malassezia, Cryptococcus, and Trichoderma spp. were the most prevalent/abundant taxa. Advanced caries was associated with significantly higher fungal load and prevalence/abundance of Candida albicans. Cryptococcus neoformans and Candida sake were significantly over-abundant in early caries, while Malassezia globosa was significantly enriched in caries-free subjects. C. albicans correlated with Streptococcus mutans and Scardovia wiggsiae among other caries-associated bacteria, while M. globosa inversely correlated with caries-associated bacteria. In-vitro, M. globosa demonstrated inhibitory properties against S. mutans. Conclusions: the results substantiate the potential role of the oral mycobiome, primarily Candida species, in dental caries. Inter-kingdom correlations and inhibition of S. mutans by M. globosa are worth further investigation.
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Affiliation(s)
- Divyashri Baraniya
- Oral Microbiome Research Laboratory, Department of Oral Health Sciences, Maurice H. Kornberg School of Dentistry, Temple University, Philadelphia, PA, USA
| | - Tsute Chen
- Department of Microbiology, Forsyth Institute, Cambridge, MA, USA
| | - Anubhav Nahar
- Oral Microbiome Research Laboratory, Department of Oral Health Sciences, Maurice H. Kornberg School of Dentistry, Temple University, Philadelphia, PA, USA
| | - Fadhl Alakwaa
- Department of Computational Medicine and Bioinformatics, University Michigan, Ann Arbor, MI, USA
| | - Jennifer Hill
- Department of Pediatric Dentistry, Maurice H. Kornberg School of Dentistry, Temple University, Philadelphia, PA, USA
| | - Marisol Tellez
- Department of Oral Health Sciences, Maurice H. Kornberg School of Dentistry, Temple University, Philadelphia, PA, USA
| | - Amid Ismail
- Department of Oral Health Sciences, Maurice H. Kornberg School of Dentistry, Temple University, Philadelphia, PA, USA
| | - Sumant Puri
- Oral Microbiome Research Laboratory, Department of Oral Health Sciences, Maurice H. Kornberg School of Dentistry, Temple University, Philadelphia, PA, USA
| | - Nezar Noor Al-Hebshi
- Oral Microbiome Research Laboratory, Department of Oral Health Sciences, Maurice H. Kornberg School of Dentistry, Temple University, Philadelphia, PA, USA
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Baraniya D, Naginyte M, Chen T, Albandar JM, Chialastri SM, Devine DA, Marsh PD, Al-Hebshi NN. Modeling Normal and Dysbiotic Subgingival Microbiomes: Effect of Nutrients. J Dent Res 2020; 99:695-702. [PMID: 31999932 DOI: 10.1177/0022034520902452] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
Screening for microbiome modulators requires availability of a high-throughput in vitro model that replicates subgingival dysbiosis and normobiosis, with a tool to measure microbial dysbiosis. Here, we tested various formulations to grow health- and periodontitis-associated subgingival microbiomes in parallel, and we describe a new subgingival dysbiosis index. Subgingival plaque samples pooled from 5 healthy subjects and, separately, 5 subjects with periodontitis were used to inoculate a Calgary Biofilm Device containing saliva-conditioned, hydroxyapatite-coated pegs. Microbiomes were grown for 7 d on either nutrient-rich media-including a modification of SHI medium, brain-heart infusion (BHI) supplemented with hemin and vitamin K, and a blend of SHI and BHI, each at 3 sucrose concentrations (0%, 0.05% and 0.1%)-or nutrient-limited media (saliva with 5%, 10%, or 20% inactivated human serum). The microbiomes were assessed for biomass, viability, and 16S rRNA profiles. In addition to richness and diversity, a dysbiosis index was calculated as the ratio of the sum of relative abundances of disease-associated species to that of health-associated species. The supplemented BHI and blend of SHI and BHI resulted in the highest biomass, whereas saliva-serum maximized viability. Distinct groups of bacteria were enriched in the different media. Regardless of medium type, the periodontitis-derived microbiomes showed higher species richness and alpha diversity and clustered with their inoculum separate from the health-derived microbiomes. Microbiomes grown in saliva-serum showed the highest species richness and the highest similarity to the clinical inocula in both health and disease. However, inclusion of serum reduced alpha diversity and increased dysbiosis in healthy microbiomes in a dose-dependent manner, mainly due to overenrichment of Porphyromonas species. The modification of SHI stood second in terms of species richness and diversity but resulted in low biomass and viability and significantly worsened dysbiosis in the periodontitis-derived microbiomes. Overall, saliva with 5% human serum was optimal for replicating subgingival microbiomes from health and disease.
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Affiliation(s)
- D Baraniya
- Oral Microbiome Research Laboratory, Department of Oral Health Sciences, Maurice H. Kornberg School of Dentistry, Temple University, Philadelphia, PA, USA
| | - M Naginyte
- Division of Oral Biology, School of Dentistry, University of Leeds, Leeds, UK
| | - T Chen
- Department of Microbiology, Forsyth Institute, Cambridge, MA, USA
| | - J M Albandar
- Department of Periodontology and Oral Implantology, Maurice H. Kornberg School of Dentistry, Temple University, Philadelphia, PA, USA
| | - S M Chialastri
- Department of Periodontology and Oral Implantology, Maurice H. Kornberg School of Dentistry, Temple University, Philadelphia, PA, USA
| | - D A Devine
- Division of Oral Biology, School of Dentistry, University of Leeds, Leeds, UK
| | - P D Marsh
- Division of Oral Biology, School of Dentistry, University of Leeds, Leeds, UK
| | - N N Al-Hebshi
- Oral Microbiome Research Laboratory, Department of Oral Health Sciences, Maurice H. Kornberg School of Dentistry, Temple University, Philadelphia, PA, USA
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35
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An exploration of smokeless tobacco product nucleic acids: a combined metagenome and metatranscriptome analysis. Appl Microbiol Biotechnol 2019; 104:751-763. [PMID: 31820070 DOI: 10.1007/s00253-019-10232-3] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2019] [Revised: 10/11/2019] [Accepted: 10/31/2019] [Indexed: 02/06/2023]
Abstract
Smokeless tobacco (ST) products are used worldwide and are a major public health concern. In addition to harmful chemicals found in these products, microbes found in ST products are believed to be responsible for generating harmful tobacco-specific nitrosamines (TSNAs), the most abundant carcinogens in ST. These microbes also contribute endotoxins and other pro-inflammatory components. A greater understanding of the microbial constituents in these products is sought in order to potentially link select design aspects or manufacturing processes to avoidable increases in harmful constituents. Previous studies looked primarily at bacterial constituents and had not differentiated between viable vs nonviable organisms, so in this study, we sought to use a dual metatranscriptomic and metagenomic analysis to see if differences exist. Using high-throughput sequencing, we observed that there were differences in taxonomic abundances between the metagenome and metatranscriptome, and in the metatranscriptome, we also observed an abundance of plant virus RNA not previously reported in DNA-only studies. We also found in the product tested, that there were no viable bacteria capable of metabolizing nitrate to nitrite. Therefore, the product tested would not be likely to increase TSNAs during shelf storage. We tested only a single product to date using the strategy presented here, but succeeded in demonstrating the value of using of these methods in tobacco products. These results present novel findings from the first combined metagenome and metatranscriptome of a commercial tobacco product.
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36
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Al-Kamel A, Baraniya D, Al-Hajj WA, Halboub E, Abdulrab S, Chen T, Al-Hebshi NN. Subgingival microbiome of experimental gingivitis: shifts associated with the use of chlorhexidine and N-acetyl cysteine mouthwashes. J Oral Microbiol 2019; 11:1608141. [PMID: 31275528 PMCID: PMC6598494 DOI: 10.1080/20002297.2019.1608141] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2019] [Revised: 04/05/2019] [Accepted: 04/11/2019] [Indexed: 02/01/2023] Open
Abstract
This study aimed to demonstrate subgingival microbial changes associated with development, prevention, and treatment of experimental gingivitis using chlorhexidine (CHX) and N-acetylcysteine (NAC) mouthwashes. This randomized clinical trial comprised two parts: a 3-week prevention sub-study in which 30 study subjects were equally assigned to either mouthwash or placebo while developing experimental gingivitis; followed by a 2-week treatment sub-study in which 20 subjects with experimental gingivitis were assigned to either mouthwash. Subgingival samples were collected at the beginning and end of each sub-study for microbial profiling with 16S rRNA gene sequencing. As expected, CHX was effective in both preventing and reversing experimental gingivitis; NAC had a modest effect. Gingivitis was associated with enrichment of TM7 HOT-346/349, Tannerella HOT-286, Cardiobacterium valvarum, Campylobacter gracilis, Porphyromonas catoniae, Leptotrichia HOT-219, and Selenomonas spp. At the phylum/genus level, TM7 showed the strongest association. Gingival health was associated with increased abundance of Haemophilus parainfluenzae, Lautropia mirabilis, Rothia spp., Streptococcus spp., and Kingella oralis. CHX demonstrated largely indiscriminate antimicrobial action, resulting in significant drop in biomass and diversity. Our results substantiate the role of specific oral bacterial species in the development of gingivitis. They also indicate that NAC is not a promising mouthwash at the concentration tested.
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Affiliation(s)
- Ahlam Al-Kamel
- Department of Preventive and Biomedical Science, Faculty of Dentistry, University of Science and Technology, Sanaa, Yemen
| | - Divyashri Baraniya
- Oral Microbiome Research Laboratory, Maurice H. Kornberg School of Dentistry, Temple University, Philadelphia, PA, USA
| | - Wadhah Abdulnaser Al-Hajj
- Department of Preventive and Biomedical Science, Faculty of Dentistry, University of Science and Technology, Sanaa, Yemen.,Department of Periodontology, Faculty of Dentistry, Thamar University, Thamar, Yemen
| | - Esam Halboub
- Department of Maxillofacial Surgery and Diagnostic Sciences, College of Dentistry, Jazan University, Jazan, Saudi Arabia
| | - Saleem Abdulrab
- Madinat Khalifa Health Center, Primary Health Care Corporation, Doha, Qatar
| | - Tsute Chen
- Department of Microbiology, Forsyth Institute, Cambridge, MA, USA
| | - Nezar Noor Al-Hebshi
- Oral Microbiome Research Laboratory, Maurice H. Kornberg School of Dentistry, Temple University, Philadelphia, PA, USA
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37
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Chattopadhyay I, Verma M, Panda M. Role of Oral Microbiome Signatures in Diagnosis and Prognosis of Oral Cancer. Technol Cancer Res Treat 2019; 18:1533033819867354. [PMID: 31370775 PMCID: PMC6676258 DOI: 10.1177/1533033819867354] [Citation(s) in RCA: 196] [Impact Index Per Article: 39.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2019] [Revised: 06/15/2019] [Accepted: 06/27/2019] [Indexed: 12/11/2022] Open
Abstract
Despite advancement in cancer treatment, oral cancer has a poor prognosis and is often detected at late stage. To overcome these challenges, investigators should search for early diagnostic and prognostic biomarkers. More than 700 bacterial species reside in the oral cavity. The oral microbiome population varies by saliva and different habitats of oral cavity. Tobacco, alcohol, and betel nut, which are causative factors of oral cancer, may alter the oral microbiome composition. Both pathogenic and commensal strains of bacteria have significantly contributed to oral cancer. Numerous bacterial species in the oral cavity are involved in chronic inflammation that lead to development of oral carcinogenesis. Bacterial products and its metabolic by-products may induce permanent genetic alterations in epithelial cells of the host that drive proliferation and/or survival of epithelial cells. Porphyromonas gingivalis and Fusobacterium nucleatum induce production of inflammatory cytokines, cell proliferation, and inhibition of apoptosis, cellular invasion, and migration thorough host cell genomic alterations. Recent advancement in metagenomic technologies may be useful in identifying oral cancer-related microbiome, their genomes, virulence properties, and their interaction with host immunity. It is very important to address which bacterial species is responsible for driving oral carcinogenesis. Alteration in the oral commensal microbial communities have potential application as a diagnostic tool to predict oral squamous cell carcinoma. Clinicians should be aware that the protective properties of the resident microflora are beneficial to define treatment strategies. To develop highly precise and effective therapeutic approaches, identification of specific oral microbiomes may be required. In this review, we narrate the role of microbiome in the progression of oral cancer and its role as an early diagnostic and prognostic biomarker for oral cancer.
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Affiliation(s)
- Indranil Chattopadhyay
- Department of Life Sciences, Central University of Tamil Nadu, Thiruvarur, Tamil Nadu, India
| | - Mukesh Verma
- Epidemiology and Genomics Research Program, Division of Cancer Control and Population Sciences, National Cancer Institute, National Institutes of Health, Rockville, MD, USA
| | - Madhusmita Panda
- Department of Life Sciences, Central University of Tamil Nadu, Thiruvarur, Tamil Nadu, India
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Sgaramella N, Wilms T, Boldrup L, Loljung L, Gu X, Coates PJ, Hassellöf P, Califano L, Lo Muzio L, Fåhraeus R, Norberg Spaak L, Franco R, Tartaro G, Colella G, Santagata M, Dell'Aversana Orabona G, Chirico F, Danielsson K, Troiano G, Ardito F, Nylander K. Ethnicity based variation in expression of E-cadherin in patients with squamous cell carcinoma of the oral tongue. Oncol Lett 2018; 16:6603-6607. [PMID: 30405799 PMCID: PMC6202509 DOI: 10.3892/ol.2018.9452] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2018] [Accepted: 08/31/2018] [Indexed: 12/16/2022] Open
Abstract
The oral tongue is the most common site for tumours within the oral cavity. Despite intense research, there has been no improvement in the survival rate for patients with oral tongue squamous cell carcinoma (OTSCC) during the last decades. Differences between oral cancer patients based on ethno-geographical distribution have been reported. The present study used immunohistochemistry to evaluate commonly used markers of cancer cell phenotypes, E-cadherin, β-catenin and cytokeratins 5 and 19, in 120 patients with OTSCC. To evaluate the impact of ethnicity, patients from Sweden and Italy were included. A higher proportion of Swedish patients exhibited high expression of E-cadherin in their tumours (P=0.039), and high levels of E-cadherin in Swedish OTSCC patients that had succumbed to their disease were associated with poor prognosis. These data demonstrated differences in the pathological characteristics of OTSCC between two different European populations. The findings emphasise the need to take ethnicity/geographical location of patients into account when comparing results from different studies of OTSCC.
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Affiliation(s)
- Nicola Sgaramella
- Department of Medical Biosciences, Umeå University, SE-901 85 Umeå, Sweden.,Multidisciplinary Department of Medical, Surgical and Dental Specialties, Second University of Naples, I-801 38 Naples, Italy.,Department of Neuroscience Reproductive and Dentistry Sciences, University of Naples Federico II, I-801 38 Naples, Italy
| | - Torben Wilms
- Department of Clinical Sciences/ENT, Umeå University, SE-901 85 Umeå, Sweden
| | - Linda Boldrup
- Department of Medical Biosciences, Umeå University, SE-901 85 Umeå, Sweden
| | - Lotta Loljung
- Department of Medical Biosciences, Umeå University, SE-901 85 Umeå, Sweden
| | - Xiaolian Gu
- Department of Medical Biosciences, Umeå University, SE-901 85 Umeå, Sweden
| | - Philip J Coates
- RECAMO, Masaryk Memorial Cancer Institute, 656 53 Brno, Czech Republic
| | - Petra Hassellöf
- Department of Medical Biosciences, Umeå University, SE-901 85 Umeå, Sweden
| | - Luigi Califano
- Department of Neuroscience Reproductive and Dentistry Sciences, University of Naples Federico II, I-801 38 Naples, Italy
| | - Lorenzo Lo Muzio
- Department of Clinical and Experimental Medicine, University of Foggia, I-71122 Foggia, Italy
| | - Robin Fåhraeus
- Department of Medical Biosciences, Umeå University, SE-901 85 Umeå, Sweden.,RECAMO, Masaryk Memorial Cancer Institute, 656 53 Brno, Czech Republic.,University Paris Diderot, INSERM UMRS1162, Paris, 75010, France
| | - Lena Norberg Spaak
- Department of Clinical Sciences/ENT, Umeå University, SE-901 85 Umeå, Sweden
| | - Renato Franco
- Dipartimento Universitario di Anatomia Patologica, Second University of Naples, Piazza Miraglia, I-801 38 Naples, Italy
| | - Gianpaolo Tartaro
- Multidisciplinary Department of Medical, Surgical and Dental Specialties, Second University of Naples, I-801 38 Naples, Italy
| | - Giuseppe Colella
- Multidisciplinary Department of Medical, Surgical and Dental Specialties, Second University of Naples, I-801 38 Naples, Italy
| | - Mario Santagata
- Multidisciplinary Department of Medical, Surgical and Dental Specialties, Second University of Naples, I-801 38 Naples, Italy
| | - Giovanni Dell'Aversana Orabona
- Department of Neuroscience Reproductive and Dentistry Sciences, University of Naples Federico II, I-801 38 Naples, Italy
| | - Fabrizio Chirico
- Multidisciplinary Department of Medical, Surgical and Dental Specialties, Second University of Naples, I-801 38 Naples, Italy
| | - Karin Danielsson
- Department of Odontology, Umeå University, SE-901 85 Umeå, Sweden
| | - Giuseppe Troiano
- Department of Clinical and Experimental Medicine, University of Foggia, I-71122 Foggia, Italy
| | - Fatima Ardito
- Department of Clinical and Experimental Medicine, University of Foggia, I-71122 Foggia, Italy
| | - Karin Nylander
- Department of Medical Biosciences, Umeå University, SE-901 85 Umeå, Sweden
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39
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Yang CY, Yeh YM, Yu HY, Chin CY, Hsu CW, Liu H, Huang PJ, Hu SN, Liao CT, Chang KP, Chang YL. Oral Microbiota Community Dynamics Associated With Oral Squamous Cell Carcinoma Staging. Front Microbiol 2018; 9:862. [PMID: 29774014 PMCID: PMC5943489 DOI: 10.3389/fmicb.2018.00862] [Citation(s) in RCA: 182] [Impact Index Per Article: 30.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2018] [Accepted: 04/13/2018] [Indexed: 12/15/2022] Open
Abstract
Oral squamous cell carcinoma (OSCC) is a highly aggressive cancer and the fourth leading malignancy among males in Taiwan. Some pathogenic bacteria are associated with periodontitis and oral cancer. However, the comprehensive profile of the oral microbiome during the cancer's progression from the early stage to the late stage is still unclear. We profiled the oral microbiota and identified bacteria biomarkers associated with OSCC. The microbiota of an oral rinse from 51 healthy individuals and 197 OSCC patients at different stages were investigated using 16S rRNA V3V4 amplicon sequencing, followed by bioinformatics and statistical analyses. The oral microbiota communities from stage 4 patients showed significantly higher complexity than those from healthy controls. The populations also dynamically changed with the cancer's progression from stage 1 to stage 4. The predominant phyla in the oral samples showed variation in the relative abundance of Fusobacteria, Bacteroidetes, and Actinobacteria. The abundance of Fusobacteria increased significantly with the progression of oral cancer from the healthy controls (2.98%) to OSCC stage 1 (4.35%) through stage 4 (7.92%). At the genus level, the abundance of Fusobacterium increased, while the number of Streptococcus, Haemophilus, Porphyromonas, and Actinomyces decreased with cancer progression. Fusobacterium periodonticum, Parvimonas micra, Streptococcus constellatus, Haemophilus influenza, and Filifactor alocis were associated with OSCC, and they progressively increased in abundance from stage 1 to stage 4. The abundances of Streptococcus mitis, Haemophilus parainfluenzae, and Porphyromonas pasteri were inversely associated with OSCC progression. We selected a bacterial marker panel of three bacteria (upregulated F. periodonticum, down-regulated S. mitis, and P. pasteri), which had an AUC of 0.956 (95% CI = 0.925-0.986) in discriminating OSCC stage 4 from the healthy controls. Furthermore, the functional prediction of oral bacterial communities showed that genes involved in carbohydrate-related metabolism, such as methane metabolism, and energy-metabolism-related parameters, such as oxidative phosphorylation and carbon fixation in photosynthetic organisms, were enriched in late-stage OSCC, while those responsible for amino acid metabolism, such as folate biosynthesis and valine, leucine, and isoleucine biosynthesis, were significantly associated with the healthy controls. In conclusion, our results provided evidence of oral bacteria community changes during oral cancer progression and suggested the possibility of using bacteria as OSCC diagnostic markers.
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Affiliation(s)
- Chia-Yu Yang
- Department of Microbiology and Immunology, College of Medicine, Chang Gung University, Taoyuan, Taiwan.,Graduate Institute of Biomedical Sciences, College of Medicine, Chang Gung University, Taoyuan, Taiwan.,Molecular Medicine Research Center, Chang Gung University, Taoyuan, Taiwan.,Division of Colon and Rectal Surgery, Chang Gung Memorial Hospital, Linkou, Taiwan
| | - Yuan-Ming Yeh
- Molecular Medicine Research Center, Chang Gung University, Taoyuan, Taiwan.,Genomic Medicine Core Laboratory, Chang Gung Memorial Hospital, Linkou, Taiwan
| | - Hai-Ying Yu
- CAS Key Laboratory of Genome Sciences and Information, Beijing Institute of Genomics, Chinese Academy of Sciences, Beijing, China
| | - Chia-Yin Chin
- Molecular Medicine Research Center, Chang Gung University, Taoyuan, Taiwan
| | - Chia-Wei Hsu
- Molecular Medicine Research Center, Chang Gung University, Taoyuan, Taiwan
| | - Hsuan Liu
- Graduate Institute of Biomedical Sciences, College of Medicine, Chang Gung University, Taoyuan, Taiwan.,Molecular Medicine Research Center, Chang Gung University, Taoyuan, Taiwan.,Division of Colon and Rectal Surgery, Chang Gung Memorial Hospital, Linkou, Taiwan.,Department of Cell and Molecular Biology, College of Medicine, Chang Gung University, Taoyuan, Taiwan
| | - Po-Jung Huang
- Graduate Institute of Biomedical Sciences, College of Medicine, Chang Gung University, Taoyuan, Taiwan.,Molecular Medicine Research Center, Chang Gung University, Taoyuan, Taiwan.,Genomic Medicine Core Laboratory, Chang Gung Memorial Hospital, Linkou, Taiwan.,Department of Biomedical Sciences, College of Medicine, Chang Gung University, Taoyuan, Taiwan
| | - Song-Nian Hu
- CAS Key Laboratory of Genome Sciences and Information, Beijing Institute of Genomics, Chinese Academy of Sciences, Beijing, China
| | - Chun-Ta Liao
- Department of Otolaryngology-Head and Neck Surgery, Chang Gung Memorial Hospital, Taoyuan, Taiwan
| | - Kai-Ping Chang
- Molecular Medicine Research Center, Chang Gung University, Taoyuan, Taiwan.,Department of Otolaryngology-Head and Neck Surgery, Chang Gung Memorial Hospital, Taoyuan, Taiwan
| | - Yu-Liang Chang
- Department of Oral & Maxillofacial Surgery, Chang Gung Memorial Hospital, Taoyuan, Taiwan
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40
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Perera M, Al-Hebshi NN, Perera I, Ipe D, Ulett GC, Speicher DJ, Chen T, Johnson NW. A dysbiotic mycobiome dominated by Candida albicans is identified within oral squamous-cell carcinomas. J Oral Microbiol 2017; 9:1385369. [PMID: 29152157 PMCID: PMC5678454 DOI: 10.1080/20002297.2017.1385369] [Citation(s) in RCA: 49] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2017] [Accepted: 09/07/2017] [Indexed: 01/04/2023] Open
Abstract
The aim of this study was to characterize the mycobiome associated with oral squamous-cell carcinoma (OSCC). DNA was extracted from 52 tissue biopsies (cases: 25 OSCC; controls: 27 intra-oral fibro-epithelial polyps [FEP]) and sequenced for the fungal internal transcribed spacer 2 region using Illumina™ 2 x300bp chemistry. Merged reads were classified to species level using a BLASTN-algorithm with UNITE's named species sequences as reference. Downstream analyses were performed using QIIME™ and linear discriminant analysis effect size. A total of 364 species representing 160 genera and two phyla (Ascomycota and Basidiomycota) were identified, with Candida and Malassezia making up 48% and 11% of the average mycobiome, respectively. However, only five species and four genera were detected in ≥50% of the samples. The species richness and diversity were significantly lower in OSCC. Genera Candida, Hannaella, and Gibberella were overrepresented in OSCC; Alternaria and Trametes were more abundant in FEP. Species-wise, Candida albicans, Candida etchellsii, and a Hannaella luteola-like species were enriched in OSCC, while aHanseniaspora uvarum-like species, Malassezia restricta, and Aspergillus tamarii were the most significantly abundant in FEP. In conclusion, a dysbiotic mycobiome dominated by C. albicans was found in association with OSCC, a finding worth further investigation.
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Affiliation(s)
- Manosha Perera
- School of Dentistry and Oral Health, Griffith University, Queensland, Australia
| | | | - Irosha Perera
- Preventive Oral Health Unit, The National Dental Hospital (Teaching), Colombo, Sri Lanka
| | - Deepak Ipe
- School of Medical Science, Griffith University, Queensland, Australia.,Menzies Health Institute Queensland;Griffith University, Nathan, Australia
| | - Glen C Ulett
- School of Medical Science, Griffith University, Queensland, Australia.,Menzies Health Institute Queensland;Griffith University, Nathan, Australia
| | - David J Speicher
- Menzies Health Institute Queensland;Griffith University, Nathan, Australia.,Microbiology and Infectious Diseases, St. Joseph's Healthcare Hamilton, Hamilton, Canada.,Department of Pathology and Molecular Medicine, McMaster University, Hamilton, Canada
| | - Tsute Chen
- Department of Microbiology, Forsyth Institute, Cambridge, USA
| | - Newell W Johnson
- School of Dentistry and Oral Health, Griffith University, Queensland, Australia.,Menzies Health Institute Queensland;Griffith University, Nathan, Australia.,Dental Institute, King's College London, London, United Kingdom
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41
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Hille J, Johnson NW. The burden of oral cancer in sub-Saharan Africa. TRANSLATIONAL RESEARCH IN ORAL ONCOLOGY 2017. [DOI: 10.1177/2057178x17721094] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Affiliation(s)
- Jos Hille
- Department of Oral and Maxillofacial Pathology, University of the Western Cape, and National Health Laboratories, Tygerberg Laboratories, Cape Town, South Africa
| | - Newell W Johnson
- Menzies Health Institute Queensland and School of Dentistry and Oral Health, Griffith University, Gold Coast Campus, Queensland, Australia
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42
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Inflammatory bacteriome featuring Fusobacterium nucleatum and Pseudomonas aeruginosa identified in association with oral squamous cell carcinoma. Sci Rep 2017; 7:1834. [PMID: 28500338 PMCID: PMC5431832 DOI: 10.1038/s41598-017-02079-3] [Citation(s) in RCA: 163] [Impact Index Per Article: 23.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2016] [Accepted: 04/21/2017] [Indexed: 12/24/2022] Open
Abstract
Studies on the possible association between bacteria and oral squamous cell carcinoma (OSCC) remain inconclusive, largely due to methodological variations/limitations. The objective of this study was to characterize the species composition as well as functional potential of the bacteriome associated with OSCC. DNA obtained from 20 fresh OSCC biopsies (cases) and 20 deep-epithelium swabs (matched control subjects) was sequenced for the V1-V3 region using Illumina’s 2 × 300 bp chemistry. High quality, non-chimeric merged reads were classified to species level using a prioritized BLASTN-algorithm. Downstream analyses were performed using QIIME, PICRUSt, and LEfSe. Fusobacterium nucleatum subsp. polymorphum was the most significantly overrepresented species in the tumors followed by Pseudomonas aeruginosa and Campylobacter sp. Oral taxon 44, while Streptococcus mitis, Rothia mucilaginosa and Haemophilus parainfluenzae were the most significantly abundant in the controls. Functional prediction showed that genes involved in bacterial mobility, flagellar assembly, bacterial chemotaxis and LPS synthesis were enriched in the tumors while those responsible for DNA repair and combination, purine metabolism, phenylalanine, tyrosine and tryptophan biosynthesis, ribosome biogenesis and glycolysis/gluconeogenesis were significantly associated with the controls. This is the first epidemiological evidence for association of F. nucleatum and P. aeruginosa with OSCC. Functionally, an “inflammatory bacteriome” is enriched in OSSC.
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