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Wang M, Chu W. Dencichine attenuates the virulence of Fusobacterium nucleatum by targeting hydrogen sulfide-producing enzyme. Int Microbiol 2024:10.1007/s10123-024-00539-1. [PMID: 38789725 DOI: 10.1007/s10123-024-00539-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2023] [Revised: 12/31/2023] [Accepted: 05/19/2024] [Indexed: 05/26/2024]
Abstract
Oral opportunistic pathogen Fusobacterium nucleatum can participate in various disease processes through the metabolite hydrogen sulfide, such as halitosis and colorectal cancer. The object of this study is to identify inhibitor capable of suppressing Fn1220, which is the principal hydrogen sulfide-producing enzyme in F. nucleatum. Through this inhibition, we aim to reduce the hydrogen sulfide production of F. nucleatum, consequently diminishing its virulence. Employing molecular docking techniques for inhibitor screening, we identified dencichine as the monomeric compound from Chinese medicine exhibiting the lowest binding energy to Fn1220 among a set of 27,045 candidates, and evaluated in vitro the ability of dencichine to inhibit hydrogen sulfide production using bismuth chloride method. Additionally, we investigated its impact on key virulence factors, including biofilm formation, hemolysis, and adhesion factors of F. nucleatum, using the crystalline violet method, sheep blood method, and RT-qPCR, respectively. Furthermore, we assessed the influence of dencichine on the lifespan of Caenorhabditis elegans. Results showed that dencichine was a suitable inhibitor of the Fn1220 of F. nucleatum, which significantly inhibited the production of virulence factors, e.g., biofilm, hemolysin, FadA, and Fap2 of F. nucleatum and improved the survival of C. elegans. We successfully identified the inhibitor of the enzyme Fn1220, dencichine, which inhibited the production of hydrogen sulfide and attenuated the virulence of F. nucleatum and holds promise as a potential therapeutic avenue for addressing oral diseases, e.g., halitosis in the future.
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Affiliation(s)
- Minyu Wang
- Department of Pharmaceutical Microbiology, School of Life Science and Technology, China Pharmaceutical University, Nanjing, 210009, China
| | - Weihua Chu
- Department of Pharmaceutical Microbiology, School of Life Science and Technology, China Pharmaceutical University, Nanjing, 210009, China.
- State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing, 210009, China.
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2
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Wang M, Wang Z, Lessing DJ, Guo M, Chu W. Fusobacterium nucleatum and its metabolite hydrogen sulfide alter gut microbiota composition and autophagy process and promote colorectal cancer progression. Microbiol Spectr 2023; 11:e0229223. [PMID: 37889013 PMCID: PMC10714730 DOI: 10.1128/spectrum.02292-23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2023] [Accepted: 09/19/2023] [Indexed: 10/28/2023] Open
Abstract
IMPORTANCE Colorectal cancer (CRC) is the second most common cancer in the world; the main treatment for CRC is immunosuppressive therapy, but this therapy is only effective for a small percentage of CRC patients, so there is an urgent need for a treatment with fewer side effects and higher efficacy. This study demonstrated that Fusobacterium nucleatum with increased abundance in CRC can regulate the autophagy process and disrupt normal intestinal microbiota by producing hydrogen sulfide, factors that may be involved in the development and progression of CRC. This study may provide a reference for future CRC treatment options that are efficient and have fewer side effects.
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Affiliation(s)
- Minyu Wang
- Department of Pharmaceutical Microbiology, School of Life Science and Technology, China Pharmaceutical University, Nanjing, China
| | - Zheng Wang
- Department of Pharmaceutical Microbiology, School of Life Science and Technology, China Pharmaceutical University, Nanjing, China
| | - Duncan James Lessing
- Department of Pharmaceutical Microbiology, School of Life Science and Technology, China Pharmaceutical University, Nanjing, China
| | - Min Guo
- Department of Pharmaceutical Microbiology, School of Life Science and Technology, China Pharmaceutical University, Nanjing, China
| | - Weihua Chu
- Department of Pharmaceutical Microbiology, School of Life Science and Technology, China Pharmaceutical University, Nanjing, China
- State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing, China
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3
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Ahn YJ, Ahn BK, Kang SW, Lee GJ. Nanozyme based colorimetric detection of biogenic gaseous H 2S using Ag@Au core/shell nanoplates with peroxidase-like activity. Mikrochim Acta 2023; 190:405. [PMID: 37731070 DOI: 10.1007/s00604-023-05979-6] [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: 05/22/2023] [Accepted: 08/31/2023] [Indexed: 09/22/2023]
Abstract
A highly sensitive and facile colorimetric assay is introduced for detecting biogenic gaseous H2S using peroxidase (POD)-like catalytic activity of silver core/gold shell nanoplates (Ag@Au NPls). H2S can react with Ag@Au NPls to form Ag2S or Au2S on their surface, which can reduce POD-like activity of Ag@Au NPls and consequently decrease the absorbance at 650 nm due to oxidation of 3,3',5,5'-tetramethylbenzidine (TMB) in the presence of hydrogen peroxide (H2O2). For in situ and multiple detection of H2S, we utilized a microplate cover with 24 polydimethylsiloxane inner wells where Ag@Au NPls reacted with H2S gas followed by treatment with TMB/H2O2. As a result, the change in absorbance at 650 nm showed a linear relationship with the H2S concentration in the range 0.33 to 2.96 μM (0.36 absorbance/μM H2S in PBS, R2 = 0.994) with a limit of detection of 263 nM and a relative standard deviation of 4.4%. Finally, this assay could detect H2S released from Eikenella corrodens, used as a model bacterium, in a short time (20 min) or at a low number of bacteria (1 × 104 colony forming units/mL). Therefore, this assay is expected to be applied for the study of H2S signaling in bacterial physiology, as well as measure H2S production released from other oral bacteria that cause halitosis and oral diseases, leading to the subsequent diagnosis.
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Affiliation(s)
- Yong Jin Ahn
- Department of Medical Engineering, Graduate School, Kyung Hee University, Seoul, 02447, Republic of Korea
- Department of Biomedical Engineering, College of Medicine, Kyung Hee University, 26, Kyungheedae-Ro, Dongdaemun-Gu, Seoul, 02447, Republic of Korea
| | - Byung-Ki Ahn
- Department of Biomedical Engineering, College of Medicine, Kyung Hee University, 26, Kyungheedae-Ro, Dongdaemun-Gu, Seoul, 02447, Republic of Korea
| | - Sung-Woong Kang
- Department of Medical Engineering, Graduate School, Kyung Hee University, Seoul, 02447, Republic of Korea
| | - Gi-Ja Lee
- Department of Medical Engineering, Graduate School, Kyung Hee University, Seoul, 02447, Republic of Korea.
- Department of Biomedical Engineering, College of Medicine, Kyung Hee University, 26, Kyungheedae-Ro, Dongdaemun-Gu, Seoul, 02447, Republic of Korea.
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Stummer N, Feichtinger RG, Weghuber D, Kofler B, Schneider AM. Role of Hydrogen Sulfide in Inflammatory Bowel Disease. Antioxidants (Basel) 2023; 12:1570. [PMID: 37627565 PMCID: PMC10452036 DOI: 10.3390/antiox12081570] [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: 07/10/2023] [Revised: 07/28/2023] [Accepted: 08/04/2023] [Indexed: 08/27/2023] Open
Abstract
Hydrogen sulfide (H2S), originally known as toxic gas, has now attracted attention as one of the gasotransmitters involved in many reactions in the human body. H2S has been assumed to play a role in the pathogenesis of many chronic diseases, of which the exact pathogenesis remains unknown. One of them is inflammatory bowel disease (IBD), a chronic intestinal disease subclassified as Crohn's disease (CD) and ulcerative colitis (UC). Any change in the amount of H2S seems to be linked to inflammation in this illness. These changes can be brought about by alterations in the microbiota, in the endogenous metabolism of H2S and in the diet. As both too little and too much H2S drive inflammation, a balanced level is needed for intestinal health. The aim of this review is to summarize the available literature published until June 2023 in order to provide an overview of the current knowledge of the connection between H2S and IBD.
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Affiliation(s)
- Nathalie Stummer
- Department of Pediatrics, University Hospital of the Paracelsus Medical University, 5020 Salzburg, Austria; (N.S.); (R.G.F.); (D.W.); (B.K.)
| | - René G. Feichtinger
- Department of Pediatrics, University Hospital of the Paracelsus Medical University, 5020 Salzburg, Austria; (N.S.); (R.G.F.); (D.W.); (B.K.)
| | - Daniel Weghuber
- Department of Pediatrics, University Hospital of the Paracelsus Medical University, 5020 Salzburg, Austria; (N.S.); (R.G.F.); (D.W.); (B.K.)
| | - Barbara Kofler
- Department of Pediatrics, University Hospital of the Paracelsus Medical University, 5020 Salzburg, Austria; (N.S.); (R.G.F.); (D.W.); (B.K.)
- Research Program for Receptor Biochemistry and Tumor Metabolism, Paracelsus Medical University (PMU), 5020 Salzburg, Austria
| | - Anna M. Schneider
- Department of Pediatrics, University Hospital of the Paracelsus Medical University, 5020 Salzburg, Austria; (N.S.); (R.G.F.); (D.W.); (B.K.)
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Yazici C, Thaker S, Castellanos KK, Al Rashdan H, Huang Y, Sarraf P, Boulay B, Grippo P, Gaskins HR, Danielson KK, Papachristou GI, Tussing-Humphreys L, Dai Y, Mutlu ER, Layden BT. Diet, Gut Microbiome, and Their End Metabolites Associate With Acute Pancreatitis Risk. Clin Transl Gastroenterol 2023; 14:e00597. [PMID: 37162146 PMCID: PMC10371326 DOI: 10.14309/ctg.0000000000000597] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/02/2022] [Revised: 04/10/2023] [Accepted: 04/26/2023] [Indexed: 05/11/2023] Open
Abstract
INTRODUCTION Diet and decreased gut microbiome diversity has been associated with acute pancreatitis (AP) risk. However, differences in dietary intake, gut microbiome, and their impact on microbial end metabolites have not been studied in AP. We aimed to determine differences in (i) dietary intake (ii) gut microbiome diversity and sulfidogenic bacterial abundance, and (iii) serum short-chain fatty acid (SCFA) and hydrogen sulfide (H 2 S) concentrations in AP and control subjects. METHODS This case-control study recruited 54 AP and 46 control subjects during hospitalization. Clinical and diet data and stool and blood samples were collected. 16S rDNA sequencing was used to determine gut microbiome alpha diversity and composition. Serum SCFA and H 2 S levels were measured. Machine learning (ML) model was used to identify microbial targets associated with AP. RESULTS AP patients had a decreased intake of vitamin D 3 , whole grains, fish, and beneficial eicosapentaenoic, docosapentaenoic, and docosahexaenoic acids. AP patients also had lower gut microbiome diversity ( P = 0.021) and a higher abundance of sulfidogenic bacteria including Veillonella sp. and Haemophilus sp., which were associated with AP risk. Serum acetate and H 2 S concentrations were significantly higher in the AP group ( P < 0.001 and P = 0.043, respectively). ML model had 96% predictive ability to distinguish AP patients from controls. DISCUSSION AP patients have decreased beneficial nutrient intake and gut microbiome diversity. An increased abundance of H 2 S-producing genera in the AP and SCFA-producing genera in the control group and predictive ability of ML model to distinguish AP patients indicates that diet, gut microbiota, and their end metabolites play a key role in AP.
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Affiliation(s)
- Cemal Yazici
- Division of Gastroenterology and Hepatology, Department of Medicine, University of Illinois Chicago, Chicago, Illinois, USA
| | - Sarang Thaker
- Division of Gastroenterology and Hepatology, Department of Medicine, Northwestern University, Chicago, Illinois, USA
| | - Karla K. Castellanos
- Division of Gastroenterology and Hepatology, Department of Medicine, University of Illinois Chicago, Chicago, Illinois, USA
| | - Haya Al Rashdan
- Division of Gastroenterology and Hepatology, Department of Medicine, University of Illinois Chicago, Chicago, Illinois, USA
| | - Yongchao Huang
- Department of Biomedical Engineering, University of Illinois Chicago, Chicago, Illinois, USA
| | - Paya Sarraf
- Department of Medicine, University of Illinois Chicago, Chicago, Illinois, USA
| | - Brian Boulay
- Division of Gastroenterology and Hepatology, Department of Medicine, University of Illinois Chicago, Chicago, Illinois, USA
| | - Paul Grippo
- Division of Gastroenterology and Hepatology, Department of Medicine, University of Illinois Chicago, Chicago, Illinois, USA
| | - H. Rex Gaskins
- Department of Animal Sciences, Cancer Center at Illinois, University of Illinois Urbana-Champaign, Urbana-Champaign, Illinois, USA
| | - Kirstie K. Danielson
- Division of Endocrinology, Diabetes and Metabolism, Department of Medicine, University of Illinois Chicago, Chicago, Illinois, USA
| | - Georgios I. Papachristou
- Division of Gastroenterology, Hepatology and Nutrition, Department of Medicine, The Ohio State University, Columbus, Ohio, USA
| | - Lisa Tussing-Humphreys
- Department of Kinesiology and Nutrition, University of Illinois Chicago, Chicago, Illinois, USA
| | - Yang Dai
- Department of Biomedical Engineering, University of Illinois Chicago, Chicago, Illinois, USA
| | - Ece R. Mutlu
- Division of Gastroenterology and Hepatology, Department of Medicine, University of Illinois Chicago, Chicago, Illinois, USA
| | - Brian T. Layden
- Division of Endocrinology, Diabetes and Metabolism, Department of Medicine, University of Illinois Chicago, Chicago, Illinois, USA
- Jesse Brown VA Medical Center, Chicago, Illinois, USA
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Basic A, Dahlén G. Microbial metabolites in the pathogenesis of periodontal diseases: a narrative review. FRONTIERS IN ORAL HEALTH 2023; 4:1210200. [PMID: 37388417 PMCID: PMC10300593 DOI: 10.3389/froh.2023.1210200] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2023] [Accepted: 05/31/2023] [Indexed: 07/01/2023] Open
Abstract
The purpose of this narrative review is to highlight the importance of microbial metabolites in the pathogenesis of periodontal diseases. These diseases, involving gingivitis and periodontitis are inflammatory conditions initiated and maintained by the polymicrobial dental plaque/biofilm. Gingivitis is a reversible inflammatory condition while periodontitis involves also irreversible destruction of the periodontal tissues including the alveolar bone. The inflammatory response of the host is a natural reaction to the formation of plaque and the continuous release of metabolic waste products. The microorganisms grow in a nutritious and shielded niche in the periodontal pocket, protected from natural cleaning forces such as saliva. It is a paradox that the consequences of the enhanced inflammatory reaction also enable more slow-growing, fastidious, anaerobic bacteria, with often complex metabolic pathways, to colonize and thrive. Based on complex food chains, nutrient networks and bacterial interactions, a diverse microbial community is formed and established in the gingival pocket. This microbiota is dominated by anaerobic, often motile, Gram-negatives with proteolytic metabolism. Although this alternation in bacterial composition often is considered pathologic, it is a natural development that is promoted by ecological factors and not necessarily a true "dysbiosis". Normal commensals are adapting to the gingival crevice when tooth cleaning procedures are absent. The proteolytic metabolism is highly complex and involves a number of metabolic pathways with production of a cascade of metabolites in an unspecific manner. The metabolites involve short chain fatty acids (SCFAs; formic, acetic, propionic, butyric, and valeric acid), amines (indole, scatole, cadaverine, putrescine, spermine, spermidine) and gases (NH3, CO, NO, H2S, H2). A homeostatic condition is often present between the colonizers and the host response, where continuous metabolic fluctuations are balanced by the inflammatory response. While it is well established that the effect of the dental biofilm on the host response and tissue repair is mediated by microbial metabolites, the mechanisms behind the tissue destruction (loss of clinical attachment and bone) are still poorly understood. Studies addressing the functions of the microbiota, the metabolites, and how they interplay with host tissues and cells, are therefore warranted.
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Genetic Determinants of Hydrogen Sulfide Biosynthesis in Fusobacterium nucleatum Are Required for Bacterial Fitness, Antibiotic Sensitivity, and Virulence. mBio 2022; 13:e0193622. [PMID: 36073813 PMCID: PMC9600241 DOI: 10.1128/mbio.01936-22] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
The Gram-negative anaerobe Fusobacterium nucleatum is a major producer of hydrogen sulfide (H2S), a volatile sulfur compound that causes halitosis. Here, we dissected the genetic determinants of H2S production and its role in bacterial fitness and virulence in this important member of the oral microbiome. F. nucleatum possesses four enzymes, CysK1, CysK2, Hly, and MegL, that presumably metabolize l-cysteine to H2S, and CysK1 was previously shown to account for most H2S production in vitro, based on correlations of enzymatic activities with gene expression at mid-log phase. Our molecular studies showed that cysK1 and megL were highly expressed at the late exponential growth phase, concomitant with high-level H2S production, while the expression levels of the other genes remained substantially lower during all growth phases. Although the genetic deletion of cysK1 without supplementation with a CysK1-catalyzed product, lanthionine, caused cell death, the conditional ΔcysK1 mutant and a mutant lacking hly were highly proficient in H2S production. In contrast, a mutant devoid of megL showed drastically reduced H2S production, and a cysK2 mutant showed only minor deficiencies. Intriguingly, the exposure of these mutants to various antibiotics revealed that only the megL mutant displayed altered susceptibility compared to the parental strain: partial sensitivity to nalidixic acid and resistance to kanamycin. Most significantly, the megL mutant was attenuated in virulence in a mouse model of preterm birth, with considerable defects in the spread to amniotic fluid and the colonization of the placenta and fetus. Evidently, the l-methionine γ-lyase MegL is a major H2S-producing enzyme in fusobacterial cells that significantly contributes to fusobacterial virulence and antibiotic susceptibility.
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Ahn BK, Ahn YJ, Lee YJ, Lee YH, Lee GJ. Simple and Sensitive Detection of Bacterial Hydrogen Sulfide Production Using a Paper-Based Colorimetric Assay. SENSORS (BASEL, SWITZERLAND) 2022; 22:5928. [PMID: 35957485 PMCID: PMC9371415 DOI: 10.3390/s22155928] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/08/2022] [Revised: 08/02/2022] [Accepted: 08/05/2022] [Indexed: 06/15/2023]
Abstract
Hydrogen sulfide (H2S) is known to participate in bacteria-induced inflammatory response in periodontal diseases. Therefore, it is necessary to quantify H2S produced by oral bacteria for diagnosis and treatment of oral diseases including halitosis and periodontal disease. In this study, we introduce a paper-based colorimetric assay for detecting bacterial H2S utilizing silver/Nafion/polyvinylpyrrolidone membrane and a 96-well microplate. This H2S-sensing paper showed a good sensitivity (8.27 blue channel intensity/μM H2S, R2 = 0.9996), which was higher than that of lead acetate paper (6.05 blue channel intensity/μM H2S, R2 = 0.9959). We analyzed the difference in H2S concentration released from four kinds of oral bacteria (Eikenella corrodens, Streptococcus sobrinus, Streptococcus mutans, and Lactobacillus casei). Finally, the H2S level in Eikenella corrodens while varying the concentration of cysteine and treatment time was quantified. This paper-based colorimetric assay can be utilized as a simple and effective tool for in vitro screening of H2S-producing ability of many bacteria as well as salivary H2S analysis.
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Affiliation(s)
- Byung-Ki Ahn
- Department of Biomedical Engineering, College of Medicine, Kyung Hee University, Seoul 02447, Korea
| | - Yong-Jin Ahn
- Department of Biomedical Engineering, College of Medicine, Kyung Hee University, Seoul 02447, Korea
| | - Young-Ju Lee
- Department of Biomedical Engineering, College of Medicine, Kyung Hee University, Seoul 02447, Korea
| | - Yeon-Hee Lee
- Department of Orofacial Pain and Oral Medicine, Kyung Hee University Dental Hospital, Kyung Hee University School of Dentistry, Seoul 02447, Korea
| | - Gi-Ja Lee
- Department of Biomedical Engineering, College of Medicine, Kyung Hee University, Seoul 02447, Korea
- Department of Medical Engineering, Kyung Hee University Graduate School, Seoul 02447, Korea
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Brar A, Majumder S, Navarro MZ, Benoit-Biancamano MO, Ronholm J, George S. Nanoparticle-Enabled Combination Therapy Showed Superior Activity against Multi-Drug Resistant Bacterial Pathogens in Comparison to Free Drugs. NANOMATERIALS 2022; 12:nano12132179. [PMID: 35808015 PMCID: PMC9268018 DOI: 10.3390/nano12132179] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/16/2022] [Revised: 06/14/2022] [Accepted: 06/22/2022] [Indexed: 02/04/2023]
Abstract
The emergence of multidrug-resistant (MDR) bacterial pathogens in farm animals and their zoonotic spread is a concern to both animal agriculture and public health. Apart from antimicrobial resistance (AMR), bacterial pathogens from the genera of Salmonella and Staphylococcus take refuge inside host cells, thereby demanding intervention strategies that can eliminate intracellular MDR pathogens. In this study, seven clinical isolates of Salmonella and Staphylococcus from swine farms were characterized for antibiotic (n = 24) resistance, resistance mechanisms, and virulence characteristics. All isolates showed resistance to one or more antibiotics and S. enterica ser. Typhimurium isolate had the highest resistance to the panel of antibiotics tested. Major resistance mechanisms identified were efflux pump and beta-lactamase enzyme activities. Staphylococcus isolates showed complete hemolysis and strong biofilm formation, while Salmonella isolates caused partial hemolysis, but showed no or weak biofilm formation. MDR isolates of S. aureus M12 and S. enterica ser. Typhimurium bacteria were subsequently tested against combinations of antibiotics and potentiating adjuvants for improved antibacterial efficacy using a checkerboard assay, and their fractional inhibitory concentration index (FICI) was calculated. A combination of chitosan and silica nanoparticles containing tetracycline (TET) and efflux pump inhibitor chlorpromazine (CPZ), respectively, was characterized for physicochemical properties and effectiveness against MDR Salmonella enterica ser. Typhimurium isolate. This combination of nano-encapsulated drugs improved the antibacterial efficacy by inhibiting AMR mechanisms (efflux activity, beta-lactamase enzyme activity, and hydrogen sulfide (H2S) production) and reducing intracellular pathogen load by 83.02 ± 14.35%. In conclusion, this study sheds light on the promising applicability of nanoparticle-enabled combination therapy to combat multidrug-resistant pathogens encountered in animal agriculture.
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Affiliation(s)
- Amarpreet Brar
- Department of Food Science and Agricultural Chemistry, Macdonald Campus, McGill University, 21111 Lakeshore, Ste Anne de Bellevue, QC H9X 3V9, Canada; (A.B.); (S.M.); (J.R.)
- Swine and Poultry Infectious Diseases Research Center (CRIPA), Faculté de Médecine Vétérinaire, Université de Montréal, 3200 Sicotte, Saint-Hyacinthe, QC J2S 2M2, Canada; (M.Z.N.); (M.-O.B.-B.)
| | - Satwik Majumder
- Department of Food Science and Agricultural Chemistry, Macdonald Campus, McGill University, 21111 Lakeshore, Ste Anne de Bellevue, QC H9X 3V9, Canada; (A.B.); (S.M.); (J.R.)
- Swine and Poultry Infectious Diseases Research Center (CRIPA), Faculté de Médecine Vétérinaire, Université de Montréal, 3200 Sicotte, Saint-Hyacinthe, QC J2S 2M2, Canada; (M.Z.N.); (M.-O.B.-B.)
| | - Maria Zardon Navarro
- Swine and Poultry Infectious Diseases Research Center (CRIPA), Faculté de Médecine Vétérinaire, Université de Montréal, 3200 Sicotte, Saint-Hyacinthe, QC J2S 2M2, Canada; (M.Z.N.); (M.-O.B.-B.)
- Research Group on Infectious Diseases in Production Animals (GREMIP), Department of Pathology and Microbiology, Faculté de Médecine Vétérinaire, Université de Montréal, 3200 Sicotte, Saint-Hyacinthe, QC J2S 2M2, Canada
| | - Marie-Odile Benoit-Biancamano
- Swine and Poultry Infectious Diseases Research Center (CRIPA), Faculté de Médecine Vétérinaire, Université de Montréal, 3200 Sicotte, Saint-Hyacinthe, QC J2S 2M2, Canada; (M.Z.N.); (M.-O.B.-B.)
- Research Group on Infectious Diseases in Production Animals (GREMIP), Department of Pathology and Microbiology, Faculté de Médecine Vétérinaire, Université de Montréal, 3200 Sicotte, Saint-Hyacinthe, QC J2S 2M2, Canada
| | - Jennifer Ronholm
- Department of Food Science and Agricultural Chemistry, Macdonald Campus, McGill University, 21111 Lakeshore, Ste Anne de Bellevue, QC H9X 3V9, Canada; (A.B.); (S.M.); (J.R.)
- Department of Animal Science, Macdonald Campus, McGill University, 2111 Lakeshore, Ste Anne de Bellevue, QC H9X 3V9, Canada
| | - Saji George
- Department of Food Science and Agricultural Chemistry, Macdonald Campus, McGill University, 21111 Lakeshore, Ste Anne de Bellevue, QC H9X 3V9, Canada; (A.B.); (S.M.); (J.R.)
- Swine and Poultry Infectious Diseases Research Center (CRIPA), Faculté de Médecine Vétérinaire, Université de Montréal, 3200 Sicotte, Saint-Hyacinthe, QC J2S 2M2, Canada; (M.Z.N.); (M.-O.B.-B.)
- Correspondence: ; Tel.: +1-514-398-7920; Fax: +1-514-398-7990
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10
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Jiang J, Huang Y, Luo N, Mi Q, Li X, Zhang W, Sun S, Zhu B, Gao Q. Correlation between the salivary microbiology and H
2
S concentration of the oral cavity. Oral Dis 2022. [DOI: 10.1111/odi.14211] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2021] [Revised: 03/11/2022] [Accepted: 04/10/2022] [Indexed: 11/26/2022]
Affiliation(s)
- Jiarui Jiang
- Joint Institute of Tobacco and Health Yunnan Academy of Tobacco Science Kunming China
| | - Yufen Huang
- Joint Institute of Tobacco and Health Yunnan Academy of Tobacco Science Kunming China
| | - Na Luo
- School of Pharmaceutical Science & Yunnan Key Laboratory of Pharmacology for Natural Products Kunming Medical University Kunming China
| | - Qili Mi
- Joint Institute of Tobacco and Health Yunnan Academy of Tobacco Science Kunming China
| | - Xuemei Li
- Joint Institute of Tobacco and Health Yunnan Academy of Tobacco Science Kunming China
| | - Wei Zhang
- Joint Institute of Tobacco and Health Yunnan Academy of Tobacco Science Kunming China
| | - Silong Sun
- Joint Institute of Tobacco and Health Yunnan Academy of Tobacco Science Kunming China
| | - Baokun Zhu
- Joint Institute of Tobacco and Health Yunnan Academy of Tobacco Science Kunming China
| | - Qian Gao
- Joint Institute of Tobacco and Health Yunnan Academy of Tobacco Science Kunming China
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11
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Basic A, Serino G, Leonhardt Å, Dahlén G, Bylund J. The secretion of cytokines by peripheral blood mononuclear cells of patients with periodontitis and healthy controls when exposed to H 2S. J Oral Microbiol 2021; 13:1957368. [PMID: 34408814 PMCID: PMC8366616 DOI: 10.1080/20002297.2021.1957368] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Background: Hydrogen sulfide(H2S) is a bacterial metabolite produced as a result of bacterial growth in subgingival pockets, suggested to partake in the pathogenesis of periodontitis. H2S has previously been shown to induce the secretion of the pro-inflammatory cytokines IL-1β and IL-18 via the NLRP3 inflammasome in monocytes. Objective: To investigate the non-NLRP3 inflammasome-dependent immunological response of human peripheral blood mononuclear cells (PBMCs) of periodontitis patients and healthy controls exposed to H2S in vitro. Methods: PBMCs of periodontitis patients(N = 31) and healthy controls(N = 32) were exposed to 1 mM sodium hydrosulfide (NaHS) at 37°C for 24 h and the secretion of cytokines was compared to resting cells. TNF-α, IFN-γ, IL-6, IL-8, IL-12p40, IL-12p70, IL-17, MCP-1, and IL-1Ra secretions were measured with Bio-Plex Pro™ Human Cytokine Assay. Results: H2S triggered the secretion of the pro-inflammatory IFN-γ, IL-6, IL-17, TNF-α, IL-12p40, and IL-12p70, while the reverse was seen for IL-1Ra. In addition, a higher basal secretion of IFN-γ, IL-6, IL-12p70, IL-17 and MCP-1 was seen from PBMCs of periodontitis patients compared to healthy controls. Conclusion: The bacterial metabolite H2S triggers the secretion of pro-inflammatory cytokines from PBMCs and may thus have a prominent role in the host-bacteria interplay in periodontitis.
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Affiliation(s)
- Amina Basic
- Oral Microbiology and Immunology, the Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - Giovanni Serino
- Department of Periodontology, Södra Älvsborgs Hospital, Borås, Sweden
| | - Åsa Leonhardt
- Oral Microbiology and Immunology, the Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - Gunnar Dahlén
- Oral Microbiology and Immunology, the Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - Johan Bylund
- Oral Microbiology and Immunology, the Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
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12
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Kunota TTR, Rahman MA, Truebody BE, Mackenzie JS, Saini V, Lamprecht DA, Adamson JH, Sevalkar RR, Lancaster JR, Berney M, Glasgow JN, Steyn AJC. Mycobacterium tuberculosis H 2S Functions as a Sink to Modulate Central Metabolism, Bioenergetics, and Drug Susceptibility. Antioxidants (Basel) 2021; 10:1285. [PMID: 34439535 PMCID: PMC8389258 DOI: 10.3390/antiox10081285] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2021] [Revised: 08/04/2021] [Accepted: 08/07/2021] [Indexed: 02/03/2023] Open
Abstract
H2S is a potent gasotransmitter in eukaryotes and bacteria. Host-derived H2S has been shown to profoundly alter M. tuberculosis (Mtb) energy metabolism and growth. However, compelling evidence for endogenous production of H2S and its role in Mtb physiology is lacking. We show that multidrug-resistant and drug-susceptible clinical Mtb strains produce H2S, whereas H2S production in non-pathogenic M. smegmatis is barely detectable. We identified Rv3684 (Cds1) as an H2S-producing enzyme in Mtb and show that cds1 disruption reduces, but does not eliminate, H2S production, suggesting the involvement of multiple genes in H2S production. We identified endogenous H2S to be an effector molecule that maintains bioenergetic homeostasis by stimulating respiration primarily via cytochrome bd. Importantly, H2S plays a key role in central metabolism by modulating the balance between oxidative phosphorylation and glycolysis, and it functions as a sink to recycle sulfur atoms back to cysteine to maintain sulfur homeostasis. Lastly, Mtb-generated H2S regulates redox homeostasis and susceptibility to anti-TB drugs clofazimine and rifampicin. These findings reveal previously unknown facets of Mtb physiology and have implications for routine laboratory culturing, understanding drug susceptibility, and improved diagnostics.
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Affiliation(s)
- Tafara T. R. Kunota
- Africa Health Research Institute, University of KwaZulu Natal, Durban 4001, South Africa; (T.T.R.K.); (M.A.R.); (B.E.T.); (J.S.M.); (D.A.L.); (J.H.A.)
| | - Md. Aejazur Rahman
- Africa Health Research Institute, University of KwaZulu Natal, Durban 4001, South Africa; (T.T.R.K.); (M.A.R.); (B.E.T.); (J.S.M.); (D.A.L.); (J.H.A.)
| | - Barry E. Truebody
- Africa Health Research Institute, University of KwaZulu Natal, Durban 4001, South Africa; (T.T.R.K.); (M.A.R.); (B.E.T.); (J.S.M.); (D.A.L.); (J.H.A.)
| | - Jared S. Mackenzie
- Africa Health Research Institute, University of KwaZulu Natal, Durban 4001, South Africa; (T.T.R.K.); (M.A.R.); (B.E.T.); (J.S.M.); (D.A.L.); (J.H.A.)
| | - Vikram Saini
- Department of Biotechnology, All India Institute of Medical Sciences, New Delhi 110029, India;
| | - Dirk A. Lamprecht
- Africa Health Research Institute, University of KwaZulu Natal, Durban 4001, South Africa; (T.T.R.K.); (M.A.R.); (B.E.T.); (J.S.M.); (D.A.L.); (J.H.A.)
| | - John H. Adamson
- Africa Health Research Institute, University of KwaZulu Natal, Durban 4001, South Africa; (T.T.R.K.); (M.A.R.); (B.E.T.); (J.S.M.); (D.A.L.); (J.H.A.)
| | - Ritesh R. Sevalkar
- Department of Microbiology, University of Alabama at Birmingham, Birmingham, AL 35294, USA; (R.R.S.); (J.N.G.)
| | - Jack R. Lancaster
- Department of Pharmacology and Chemical Biology, Vascular Medicine Institute, University of Pittsburgh School of Medicine, Pittsburgh, PA 15261, USA;
| | - Michael Berney
- Department of Microbiology and Immunology, Albert Einstein College of Medicine, New York, NY 10462, USA;
| | - Joel N. Glasgow
- Department of Microbiology, University of Alabama at Birmingham, Birmingham, AL 35294, USA; (R.R.S.); (J.N.G.)
| | - Adrie J. C. Steyn
- Africa Health Research Institute, University of KwaZulu Natal, Durban 4001, South Africa; (T.T.R.K.); (M.A.R.); (B.E.T.); (J.S.M.); (D.A.L.); (J.H.A.)
- Department of Microbiology, University of Alabama at Birmingham, Birmingham, AL 35294, USA; (R.R.S.); (J.N.G.)
- Centers for AIDS Research and Free Radical Biology, University of Alabama at Birmingham, Birmingham, AL 35294, USA
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13
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Wang P, Jiang S, Li Y, Luo Q, Lin J, Hu L, Liu X, Xue F. Virus-like mesoporous silica-coated plasmonic Ag nanocube with strong bacteria adhesion for diabetic wound ulcer healing. NANOMEDICINE-NANOTECHNOLOGY BIOLOGY AND MEDICINE 2021; 34:102381. [PMID: 33771705 DOI: 10.1016/j.nano.2021.102381] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/17/2020] [Revised: 01/21/2021] [Accepted: 03/03/2021] [Indexed: 01/13/2023]
Abstract
The Gram-positive bacterium Staphylococcus aureus (MRSA) and the Gram-negative bacillus Escherichia coli (E. coli) can be commonly found in diabetic foot ulcers. However, the multi-drug resistant pathogenic bacteria infection is often difficult to eradicate by the conventional antibiotics and easy to spread which can lead to complications such as gangrene or sepsis. In this work, in order to pull through the low cell wall adhesion capability of typical antibacterial Ag nanoparticles, we fabricated biomimic virus-like mesoporous silica coated Ag nanocubes with gentamicin loading, and then the core-shell nanostructure was entrapped in the FDA approved hydrogel dressing. Interestingly, the Ag nanocubes with virus-like mesoporous silica coating are capable of effectively adsorbing on the rigid cell wall of both E. coli and MRSA. The intracellular H2S in natural bacterial environment can induce generation of small Ag nanospheres, which are the ideal antibacterial nanoagents. Combined with the gentamicin delivery, the pathogenic bacteria in diabetic wound can be completely eradicated by our dressing to improve the wound healing procedure. This virus-like core-shell nanostructure sheds light for the future wound healing dressing design to promote the clinical applications on antibacterial eradication.
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Affiliation(s)
- Peiyuan Wang
- Key Laboratory of Design and Assembly of Functional Nanostructures, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, PR China; Department of Translational Medicine, Xiamen Institute of Rare Earth Materials, Chinese Academy of Sciences, Xiamen, PR China.; The United Innovation of Mengchao Hepatobiliary Technology Key Laboratory of Fujian Province, Mengchao Hepatobiliary Hospital of Fujian Medical University, Fuzhou, PR China
| | - Suhua Jiang
- Key Laboratory of Design and Assembly of Functional Nanostructures, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, PR China; Department of Translational Medicine, Xiamen Institute of Rare Earth Materials, Chinese Academy of Sciences, Xiamen, PR China.; The United Innovation of Mengchao Hepatobiliary Technology Key Laboratory of Fujian Province, Mengchao Hepatobiliary Hospital of Fujian Medical University, Fuzhou, PR China
| | - Yang Li
- Key Laboratory of Design and Assembly of Functional Nanostructures, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, PR China; Department of Translational Medicine, Xiamen Institute of Rare Earth Materials, Chinese Academy of Sciences, Xiamen, PR China.; The United Innovation of Mengchao Hepatobiliary Technology Key Laboratory of Fujian Province, Mengchao Hepatobiliary Hospital of Fujian Medical University, Fuzhou, PR China
| | - Qiang Luo
- Key Laboratory of Design and Assembly of Functional Nanostructures, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, PR China; Department of Translational Medicine, Xiamen Institute of Rare Earth Materials, Chinese Academy of Sciences, Xiamen, PR China.; The United Innovation of Mengchao Hepatobiliary Technology Key Laboratory of Fujian Province, Mengchao Hepatobiliary Hospital of Fujian Medical University, Fuzhou, PR China
| | - Jinyan Lin
- Key Laboratory of Design and Assembly of Functional Nanostructures, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, PR China; Department of Translational Medicine, Xiamen Institute of Rare Earth Materials, Chinese Academy of Sciences, Xiamen, PR China.; The United Innovation of Mengchao Hepatobiliary Technology Key Laboratory of Fujian Province, Mengchao Hepatobiliary Hospital of Fujian Medical University, Fuzhou, PR China
| | - Lidan Hu
- Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, Department of Biochemistry and Molecular Biology, University of South China, Hengyang, PR China
| | - Xiaolong Liu
- Key Laboratory of Design and Assembly of Functional Nanostructures, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, PR China; Department of Translational Medicine, Xiamen Institute of Rare Earth Materials, Chinese Academy of Sciences, Xiamen, PR China.; The United Innovation of Mengchao Hepatobiliary Technology Key Laboratory of Fujian Province, Mengchao Hepatobiliary Hospital of Fujian Medical University, Fuzhou, PR China.
| | - Fangqin Xue
- Shengli Clinical Medical College of Fujian Medical University, Fuzhou, PR China; Department of Gastrointestinal Surgery, Fujian Provincial Hospital, Fuzhou, PR China.
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14
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Liu F, Liang T, Zhang Z, Liu L, Li J, Dong W, Zhang H, Bai S, Ma L, Kang L. Effects of altitude on human oral microbes. AMB Express 2021; 11:41. [PMID: 33677720 PMCID: PMC7936934 DOI: 10.1186/s13568-021-01200-0] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2020] [Accepted: 02/24/2021] [Indexed: 12/15/2022] Open
Abstract
Human oral microbes play a vital role maintaining host metabolic homeostasis. The Qinghai-Tibet Plateau is mainly characterized by a high altitude, dry, cold, and hypoxic environment. The oral microbiota is subject to selective pressure from the plateau environment, which affects oral health. Only a few studies have focused on the characteristics of oral microbiota in high-altitude humans. We collected saliva samples from 167 Tibetans at four altitudes (2800 to 4500 m) in Tibet to explore the relationship between the high altitude environment and oral microbiota. We conducted a two (high- and ultra-high-altitude) group analysis based on altitude, and adopted the 16S rRNA strategy for high-throughput sequencing. The results show that the alpha diversity of the oral microbiota decreased with altitude, whereas beta diversity increased with altitude. A LEfSe analysis revealed that the oral microbial biomarker of the high-altitude group (< 3650 m) was Streptococcus, and the biomarker of the ultra-high-altitude group (> 4000 m) was Prevotella. The relative abundance of Prevotella increased with altitude, whereas the relative abundance of Streptococcus decreased with altitude. A network analysis showed that the microbial network structure was more compact and complex, and the interaction between the bacterial genera was more intense in the high altitude group. Gene function prediction results showed that the amino acid and vitamin metabolic pathways were upregulated in the ultra-high-altitude group. These result show that altitude is an important factor affecting the diversity and community structure of the human oral microbiota.
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15
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Darbyshire AL, Mothersole RG, Wolthers KR. A Fold Type II PLP-Dependent Enzyme from Fusobacterium nucleatum Functions as a Serine Synthase and Cysteine Synthase. Biochemistry 2021; 60:524-536. [PMID: 33539704 DOI: 10.1021/acs.biochem.0c00902] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Serine synthase (SS) from Fusobacterium nucleatum is a fold type II pyridoxal 5'-phosphate (PLP)-dependent enzyme that catalyzes the β-replacement of l-cysteine with water to form l-serine and H2S. Herein, we show that SS can also function as a cysteine synthase, catalyzing the β-replacement of l-serine with bisulfide to produce l-cysteine and H2O. The forward (serine synthase) and reverse (cysteine synthase) reactions occur with comparable turnover numbers and catalytic efficiencies for the amino acid substrate. Reaction of SS with l-cysteine leads to transient formation of a quinonoid species, suggesting that deprotonation of the Cα and β-elimination of the thiolate group from l-cysteine occur via a stepwise mechanism. In contrast, the quinonoid species was not detected in the formation of the α-aminoacrylate intermediate following reaction of SS with l-serine. A key active site residue, D232, was shown to stabilize the more chemically reactive ketoenamine PLP tautomer and also function as an acid/base catalyst in the forward and reverse reactions. Fluorescence resonance energy transfer between PLP and W99, the enzyme's only tryptophan residue, supports ligand-induced closure of the active site, which shields the PLP cofactor from the solvent and increases the basicity of D232. These results provide new insight into amino acid metabolism in F. nucleatum and highlight the multiple catalytic roles of D232 in a new member of the fold type II family of PLP-dependent enzymes.
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Affiliation(s)
- Amanda L Darbyshire
- Department of Chemistry, University of British Columbia, Okanagan Campus, 3247 University Way, Kelowna, BC V1V 1V7, Canada
| | - Robert G Mothersole
- Department of Chemistry, University of British Columbia, Okanagan Campus, 3247 University Way, Kelowna, BC V1V 1V7, Canada
| | - Kirsten R Wolthers
- Department of Chemistry, University of British Columbia, Okanagan Campus, 3247 University Way, Kelowna, BC V1V 1V7, Canada
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16
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Mishra R, Kohli S, Malhotra N, Bandyopadhyay P, Mehta M, Munshi M, Adiga V, Ahuja VK, Shandil RK, Rajmani RS, Seshasayee ASN, Singh A. Targeting redox heterogeneity to counteract drug tolerance in replicating Mycobacterium tuberculosis. Sci Transl Med 2020; 11:11/518/eaaw6635. [PMID: 31723039 DOI: 10.1126/scitranslmed.aaw6635] [Citation(s) in RCA: 58] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2019] [Revised: 06/26/2019] [Accepted: 10/25/2019] [Indexed: 12/23/2022]
Abstract
The capacity of Mycobacterium tuberculosis (Mtb) to tolerate multiple antibiotics represents a major problem in tuberculosis (TB) management. Heterogeneity in Mtb populations is one of the factors that drives antibiotic tolerance during infection. However, the mechanisms underpinning this variation in bacterial population remain poorly understood. Here, we show that phagosomal acidification alters the redox physiology of Mtb to generate a population of replicating bacteria that display drug tolerance during infection. RNA sequencing of this redox-altered population revealed the involvement of iron-sulfur (Fe-S) cluster biogenesis, hydrogen sulfide (H2S) gas, and drug efflux pumps in antibiotic tolerance. The fraction of the pH- and redox-dependent tolerant population increased when Mtb infected macrophages with actively replicating HIV-1, suggesting that redox heterogeneity could contribute to high rates of TB therapy failure during HIV-TB coinfection. Pharmacological inhibition of phagosomal acidification by the antimalarial drug chloroquine (CQ) eradicated drug-tolerant Mtb, ameliorated lung pathology, and reduced postchemotherapeutic relapse in in vivo models. The pharmacological profile of CQ (C max and AUClast) exhibited no major drug-drug interaction when coadministered with first line anti-TB drugs in mice. Our data establish a link between phagosomal pH, redox metabolism, and drug tolerance in replicating Mtb and suggest repositioning of CQ to shorten TB therapy and achieve a relapse-free cure.
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Affiliation(s)
- Richa Mishra
- Department of Microbiology and Cell Biology, Indian Institute of Science, Bangalore 560012, India.,Centre for Infectious Disease Research, Indian Institute of Science, Bangalore 560012, India
| | - Sakshi Kohli
- Department of Microbiology and Cell Biology, Indian Institute of Science, Bangalore 560012, India.,Centre for Infectious Disease Research, Indian Institute of Science, Bangalore 560012, India
| | - Nitish Malhotra
- National Centre for Biological Sciences (NCBS), Tata Institute of Fundamental Research (TIFR), Bangalore 560065, India
| | - Parijat Bandyopadhyay
- Department of Microbiology and Cell Biology, Indian Institute of Science, Bangalore 560012, India.,Centre for Infectious Disease Research, Indian Institute of Science, Bangalore 560012, India
| | - Mansi Mehta
- Department of Microbiology and Cell Biology, Indian Institute of Science, Bangalore 560012, India.,Centre for Infectious Disease Research, Indian Institute of Science, Bangalore 560012, India
| | - MohamedHusen Munshi
- Department of Microbiology and Cell Biology, Indian Institute of Science, Bangalore 560012, India.,Centre for Infectious Disease Research, Indian Institute of Science, Bangalore 560012, India
| | - Vasista Adiga
- Centre for Infectious Disease Research, Indian Institute of Science, Bangalore 560012, India
| | | | - Radha K Shandil
- Foundation for Neglected Disease Research, Bangalore 560065, India
| | - Raju S Rajmani
- Centre for Infectious Disease Research, Indian Institute of Science, Bangalore 560012, India
| | - Aswin Sai Narain Seshasayee
- National Centre for Biological Sciences (NCBS), Tata Institute of Fundamental Research (TIFR), Bangalore 560065, India
| | - Amit Singh
- Department of Microbiology and Cell Biology, Indian Institute of Science, Bangalore 560012, India.
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17
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Dilek N, Papapetropoulos A, Toliver-Kinsky T, Szabo C. Hydrogen sulfide: An endogenous regulator of the immune system. Pharmacol Res 2020; 161:105119. [PMID: 32781284 DOI: 10.1016/j.phrs.2020.105119] [Citation(s) in RCA: 115] [Impact Index Per Article: 28.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/29/2020] [Revised: 07/30/2020] [Accepted: 07/30/2020] [Indexed: 12/12/2022]
Abstract
Hydrogen sulfide (H2S) is now recognized as an endogenous signaling gasotransmitter in mammals. It is produced by mammalian cells and tissues by various enzymes - predominantly cystathionine β-synthase (CBS), cystathionine γ-lyase (CSE) and 3-mercaptopyruvate sulfurtransferase (3-MST) - but part of the H2S is produced by the intestinal microbiota (colonic H2S-producing bacteria). Here we summarize the available information on the production and functional role of H2S in the various cell types typically associated with innate immunity (neutrophils, macrophages, dendritic cells, natural killer cells, mast cells, basophils, eosinophils) and adaptive immunity (T and B lymphocytes) under normal conditions and as it relates to the development of various inflammatory and immune diseases. Special attention is paid to the physiological and the pathophysiological aspects of the oral cavity and the colon, where the immune cells and the parenchymal cells are exposed to a special "H2S environment" due to bacterial H2S production. H2S has many cellular and molecular targets. Immune cells are "surrounded" by a "cloud" of H2S, as a result of endogenous H2S production and exogenous production from the surrounding parenchymal cells, which, in turn, importantly regulates their viability and function. Downregulation of endogenous H2S producing enzymes in various diseases, or genetic defects in H2S biosynthetic enzyme systems either lead to the development of spontaneous autoimmune disease or accelerate the onset and worsen the severity of various immune-mediated diseases (e.g. autoimmune rheumatoid arthritis or asthma). Low, regulated amounts of H2S, when therapeutically delivered by small molecule donors, improve the function of various immune cells, and protect them against dysfunction induced by various noxious stimuli (e.g. reactive oxygen species or oxidized LDL). These effects of H2S contribute to the maintenance of immune functions, can stimulate antimicrobial defenses and can exert anti-inflammatory therapeutic effects in various diseases.
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Affiliation(s)
- Nahzli Dilek
- Chair of Pharmacology, Section of Medicine, University of Fribourg, Switzerland
| | - Andreas Papapetropoulos
- Laboratory of Pharmacology, Faculty of Pharmacy, National and Kapodistrian University of Athens, Greece
| | - Tracy Toliver-Kinsky
- Department of Anesthesiology, University of Texas Medical Branch, Galveston, TX, USA
| | - Csaba Szabo
- Chair of Pharmacology, Section of Medicine, University of Fribourg, Switzerland; Department of Anesthesiology, University of Texas Medical Branch, Galveston, TX, USA.
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18
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Thymoquinone inhibits biofilm formation and virulence properties of periodontal bacteria. Arch Oral Biol 2020; 115:104744. [PMID: 32416351 DOI: 10.1016/j.archoralbio.2020.104744] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2020] [Revised: 03/27/2020] [Accepted: 04/30/2020] [Indexed: 01/05/2023]
Abstract
OBJECTIVES To evaluate the effects of thymoquinone (TQ) on biofilm formation, hemolysis, hydrogen sulfide (H2S) production and expression of virulence factors of Fusobacterium nucleatum and Porphyromonas gingivalis. MATERIALS AND METHODS Reference strains of F. nucleatum ATCC 25586 and P. gingivalis A7436 were tested in our study. The minimum inhibitory concentration (MIC) of TQ was determined by broth microdilution method. The impacts of TQ on virulence properties of the periodontal bacteria including biofilm formation, hemolysis and H2S activities were studied. Quantitative RT-PCR was performed to evaluate the expression levels of key virulence factors including outer membrane proteins (aim-1, fadA) in F. nucleatum as well as cysteine proteinases or gingipains (rgpA, rgpB, kgp) and fimbriae (fimA, mfa1) in P. gingivalis. RESULTS The MIC of TQ were 12.5 and 1.56 μg/mL in F. nucleatum and P. gingivalis, respectively. The sub-MIC concentrations of TQ could prevent biofilm formation and hemolysis activities of both bacteria. TQ also inhibited H2S production which is highly associated with oral malodour. Scanning electron microscopy revealed that TQ could disrupt bacterial membrane and led to cell lysis. Furthermore, TQ reduced the expression of major virulence factors tested in F. nucleatum and P. gingivalis. CONCLUSIONS The TQ had potent antibacterial effect and could attenuate virulence properties of F. nucleatum and P. gingivalis. Therefore, TQ has the potential to be developed and used in periodontal treatments, especially to prevent the progression of periodontitis.
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19
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Silva NLC, Motta NAV, Soares MA, Araujo OMO, Espíndola LCP, Colombo APV, Lopes RT, Brito FCF, Miranda ALP, Tributino JLM. Periodontal status, vascular reactivity, and platelet aggregation changes in rats submitted to hypercholesterolemic diet and periodontitis. J Periodontal Res 2020; 55:453-463. [PMID: 31994219 DOI: 10.1111/jre.12730] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2019] [Revised: 12/14/2019] [Accepted: 12/28/2019] [Indexed: 12/11/2022]
Abstract
BACKGROUND AND OBJECTIVES Periodontitis can corroborate with development and progression of atherosclerosis and a possible bidirectional interaction between both pathologies has been hypothesized. The aim of this work was to study the interactions between diet-induced hypercholesterolemia and ligature-induced periodontitis in Wistar rats submitted to both conditions. MATERIAL AND METHODS Animals were divided into four experimental groups: C (control: standard diet without periodontitis), Perio (periodontitis plus standard diet), HC (high cholesterol diet without periodontitis), and HC + Perio (high cholesterol diet plus periodontitis). The diets were offered for 45 days and a silk ligature was applied in the lower first molars of Perio and HC-Perio animals on day 34 and maintained for 11 days until euthanasia. The mandibles were excised, and alveolar bone loss was determined by macroscopic and micro-tomographic (µ-CT) imaging. Blood samples were obtained, and platelet aggregation was induced in plasma rich in platelets by adenosine diphosphate (ADP) and collagen. Endothelium-dependent vascular reactivity and protein expression of endothelial (eNOS), phosphorylated endothelial (peNOS), and inducible (iNOS) nitric oxide synthases were evaluated in aorta samples. RESULTS The HC diet combined with periodontitis (HC + Perio group) was associated with an increased alveolar bone loss, when compared to the other groups. Both in Perio and HC groups, platelet aggregation induced by ADP or collagen was increased, while maximum aortic relaxation induced by acetylcholine was decreased. Periodontitis or HC diet alone decreased the expression of peNOS and HC diet increased the expression of iNOS. In contrast, no additive or synergistic effects were found in vascular reactivity or in platelet aggregation when the two conditions were associated (HC + Perio group). CONCLUSION Hypercholesterolemia accelerated the process of bone loss induced by periodontitis while a high cholesterol diet or periodontitis individually increased platelet aggregation and vascular reactivity in rats without additive or synergistic effects, when associated.
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Affiliation(s)
- Natália L C Silva
- Laboratory of Studies in Experimental Pharmacology (LEFEx), Department of Pharmaceutical Biotechnology, Faculty of Pharmacy, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Nadia A V Motta
- Laboratory of Experimental Pharmacology (LAFE), Department of Physiology and Pharmacology, Biomedical Institute, Fluminense Federal University, Niterói, Brazil
| | - Mariana A Soares
- Laboratory of Studies in Experimental Pharmacology (LEFEx), Department of Pharmaceutical Biotechnology, Faculty of Pharmacy, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Olga M O Araujo
- Laboratory of Nuclear Instrumentation (LIN), Nuclear Engineering Program (PEN), Institute Alberto Luiz de Coimbra of Post-Graduation and Research in Engineering (COPPE-UFRJ), Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Laís Christina P Espíndola
- Department of Medical Microbiology, Institute of Microbiology Paulo de Góes, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Ana Paula V Colombo
- Department of Medical Microbiology, Institute of Microbiology Paulo de Góes, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Ricardo Tadeu Lopes
- Laboratory of Nuclear Instrumentation (LIN), Nuclear Engineering Program (PEN), Institute Alberto Luiz de Coimbra of Post-Graduation and Research in Engineering (COPPE-UFRJ), Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Fernanda Carla F Brito
- Laboratory of Experimental Pharmacology (LAFE), Department of Physiology and Pharmacology, Biomedical Institute, Fluminense Federal University, Niterói, Brazil
| | - Ana Luísa P Miranda
- Laboratory of Studies in Experimental Pharmacology (LEFEx), Department of Pharmaceutical Biotechnology, Faculty of Pharmacy, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Jorge L M Tributino
- Laboratory of Molecular Pharmacology (LFM), Institute of Biomedical Sciences, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
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20
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Roslund K, Lehto M, Pussinen P, Groop PH, Halonen L, Metsälä M. On-line profiling of volatile compounds produced in vitro by pathogenic oral bacteria. J Breath Res 2019; 14:016010. [PMID: 31698353 DOI: 10.1088/1752-7163/ab5559] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Infections by oral pathogens are one of the most common health problems worldwide. Due to the intimate connection between exhaled breath and the oral cavity, breath analysis could potentially be used to diagnose these infections. However, little is known about the volatile emissions of important oral pathogens that are connected with gingivitis and periodontitis. In this study, we have performed in vitro headspace measurements on four important oral pathogens (P. gingivalis, T. forsythia, P. intermedia and P. nigrescens) using proton transfer reaction time-of-flight mass spectrometry (PTR-TOF-MS). Some of the most abundant compounds produced by the bacteria include hydrogen sulphide, methanethiol, acetone, dimethylsulphide, isoprene, cyclopentanone and indole as tentatively assigned from the mass spectra. Several other abundant mass signals were recorded but the assignment of these is less certain. Some of the bacterial species can be separated from each other by the emitted volatile fingerprints. The results of this study can be used in potential development of a diagnostic breath test for oral infections. In addition, as several of the measured compounds are known to be toxic, the results point to an intriguing possibility of studying the connection between the bacterial virulence and the emitted volatile compounds.
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Affiliation(s)
- Kajsa Roslund
- Department of Chemistry, University of Helsinki, Helsinki, Finland
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Ye W, Zhang Y, He M, Zhu C, Feng XP. Relationship of tongue coating microbiome on volatile sulfur compounds in healthy and halitosis adults. J Breath Res 2019; 14:016005. [DOI: 10.1088/1752-7163/ab47b4] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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22
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Barton LL, Granat AS, Lee S, Xu H, Ritz NL, Hider R, Lin HC. Bismuth(III) interactions with Desulfovibrio desulfuricans: inhibition of cell energetics and nanocrystal formation of Bi2S3 and Bi0. Biometals 2019; 32:803-811. [DOI: 10.1007/s10534-019-00213-4] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2019] [Accepted: 08/29/2019] [Indexed: 02/04/2023]
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Basic A, Serino G, Leonhardt Å, Dahlén G. H 2S mediates increased interleukin (IL)-1β and IL-18 production in leukocytes from patients with periodontitis. J Oral Microbiol 2019; 11:1617015. [PMID: 31164964 PMCID: PMC6534246 DOI: 10.1080/20002297.2019.1617015] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2019] [Revised: 04/29/2019] [Accepted: 05/02/2019] [Indexed: 11/05/2022] Open
Abstract
Background: The mechanisms involved in the interplay between the bacteria and the host cells in periodontitis are not fully understood. Aim: To investigate the effect of the bacterial metabolite H2S on the pro-inflammatory cytokines interleukin (IL)-1β and IL-18 from periodontitis patients and healthy controls, and to evaluate the composition of the subgingival microbiota with its capacity to produce H2S. Methods: Subgingival bacterial samples from patients with periodontitis (N=32) and healthy controls (N=32) were investigated for H2S production and bacterial composition. Peripheral blood mononuclear cells (PBMCs) were cultured in the presence/absence of 1mM H2S for 24h and cytokine concentrations were measured. Results: Subgingival plaque from periodontitis patients had more H2S producing bacteria and produced more H2S, than healthy controls. PBMCs exposed to H2S secreted significantly more IL-1ß and IL-18 (p<0.0001) than untreated control PBMCs from both groups. PBMCs from the periodontitis patients secreted higher levels of the cytokines, both spontaneously (IL-1ß p=0.0001; IL-18 p=0.09) and after exposure to H2S (IL-1ß p=0.03; IL-18 p=0.04), which is a new finding not previously reported. Conclusions: H2S, from the subgingival microbiota, can contribute to a host inflammatory response through secretion of the pro-inflammatory cytokines IL-1β and IL-18. Since this response differs between individuals, it may also reflect the susceptibility of the host to develop periodontitis.
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Affiliation(s)
- Amina Basic
- Oral Microbiology and Immunology, The Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - Giovanni Serino
- Department of Periodontology, Södra Älvsborgs Hospital, Borås, Sweden
| | - Åsa Leonhardt
- Oral Microbiology and Immunology, The Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - Gunnar Dahlén
- Oral Microbiology and Immunology, The Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
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Dietary Factors in Sulfur Metabolism and Pathogenesis of Ulcerative Colitis. Nutrients 2019; 11:nu11040931. [PMID: 31027194 PMCID: PMC6521024 DOI: 10.3390/nu11040931] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2019] [Revised: 04/20/2019] [Accepted: 04/23/2019] [Indexed: 02/07/2023] Open
Abstract
The biogeography of inflammation in ulcerative colitis (UC) suggests a proximal to distal concentration gradient of a toxin. Hydrogen sulfide (H2S) has long been considered one such toxin candidate, and dietary sulfur along with the abundance of sulfate reducing bacteria (SRB) were considered the primary determinants of H2S production and clinical course of UC. The metabolic milieu in the lumen of the colon, however, is the result of a multitude of factors beyond dietary sulfur intake and SRB abundance. Here we present an updated formulation of the H2S toxin hypothesis for UC pathogenesis, which strives to incorporate the interdependency of diet composition and the metabolic activity of the entire colon microbial community. Specifically, we suggest that the increasing severity of inflammation along the proximal-to-distal axis in UC is due to the dilution of beneficial factors, concentration of toxic factors, and changing detoxification capacity of the host, all of which are intimately linked to the nutrient flow from the diet.
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Anishchenko E, Vigorito C, Mele L, Lombari P, Perna AF, Ingrosso D. Novel Applications of Lead Acetate and Flow Cytometry Methods for Detection of Sulfur-Containing Molecules. Methods Protoc 2019; 2:mps2010013. [PMID: 31164595 PMCID: PMC6481055 DOI: 10.3390/mps2010013] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2018] [Revised: 01/21/2019] [Accepted: 01/29/2019] [Indexed: 12/30/2022] Open
Abstract
Hydrogen sulfide (H2S) is the most recently established gaseous vasodilator, enzymatically produced from cysteine metabolism, involved in a number of pathophysiological processes. However, its accurate detection in vivo is critical due to its volatility and tendency to form sulfane sulfur derivatives, thus limiting the data interpretation of its biological roles. We developed new applications of the simple and rapid method to measure H2S release in cell culture systems, based on the lead acetate strip test. This test, previously prevalently used in microbiology, was compared with the agar trap method, applied, in parallel, on both cell cultures and cell-free samples. Sulfane sulfur represents the major species derived from intracellular H2S. Various fluorescent probes are available for quantitation of H2S derivatives intracellularly. We present here an alternative to the classic imaging method for sulfane sulfur evaluation, running on a flow cytometer, based on SSP4 probe labeling. Flow cytometry turned out to be more direct, fully quantitative and less time-consuming compared to microscopy and more precise with respect to the fluorescence multi-plate reader assay. The new application methods for H2S determination appear to be fully suitable for the analysis of H2S release and sulfane sulfur content in biological samples.
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Affiliation(s)
- Evgeniya Anishchenko
- Department of Translational Medical Sciences, University of Campania "Luigi Vanvitelli," 80131 Naples, Italy.
- Department of Precision Medicine, University of Campania "Luigi Vanvitelli," 80138 Naples, Italy.
| | - Carmela Vigorito
- Department of Translational Medical Sciences, University of Campania "Luigi Vanvitelli," 80131 Naples, Italy.
- Department of Precision Medicine, University of Campania "Luigi Vanvitelli," 80138 Naples, Italy.
| | - Luigi Mele
- Department of Experimental Medicine, University of Campania "Luigi Vanvitelli," 80138 Naples, Italy.
| | - Patrizia Lombari
- Department of Translational Medical Sciences, University of Campania "Luigi Vanvitelli," 80131 Naples, Italy.
- Department of Precision Medicine, University of Campania "Luigi Vanvitelli," 80138 Naples, Italy.
| | - Alessandra F Perna
- Department of Translational Medical Sciences, University of Campania "Luigi Vanvitelli," 80131 Naples, Italy.
| | - Diego Ingrosso
- Department of Precision Medicine, University of Campania "Luigi Vanvitelli," 80138 Naples, Italy.
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Manji F, Dahlen G, Fejerskov O. Caries and Periodontitis: Contesting the Conventional Wisdom on Their Aetiology. Caries Res 2018; 52:548-564. [PMID: 29694978 DOI: 10.1159/000488948] [Citation(s) in RCA: 48] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2018] [Accepted: 03/27/2018] [Indexed: 01/15/2023] Open
Abstract
We review the literature on the oral microbiome and the role of the microbiota in the development of dental caries and periodontitis. While most research has been focused on identifying one or more specific determinants of these diseases, the results have provided limited predictive value and have not been able to explain the variation in the distribution of these diseases observed in epidemiological or clinical studies. Drawing on existing knowledge about the nature of the oral microbiota, we suggest that a stochastic model based on the Weiner process provides simple and parsimonious explanations for the pathogenesis of both caries and periodontitis, making few assumptions, and providing explanations for phenomena that have hitherto proved difficult, or have required complex arguments, to explain. These diseases occur as the result of the dental hard tissues and periodontal tissues integrating the random "noise" caused by normal metabolic activities of commensal microorganisms in the dental biofilm. The processes that result in the progression and regression of caries and periodontitis may be considered as "natural," rather than pathological, even if, when left unchecked over long periods of time, they can result in the development of pathologies. The likelihood of progression or regression can be influenced by other determinants, but these processes will nevertheless occur in the absence of such influences. The distributional characteristics of the model approximate the findings of epidemiological studies indicating that, for both caries and periodontitis, there will be few sites affected in the early period after the eruption of the permanent dentition, but in those older there is an almost linear relationship with increasing age; furthermore, the longer a site survives without being affected, the less likely that it will be affected. We discuss the clinical and public health importance of these findings.
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Affiliation(s)
- Firoze Manji
- Daraja Press, CSP Mozart, Montreal, Québec, Canada
| | - Gunnar Dahlen
- Department of Oral Microbiology and Immunology, Institute of Odontology, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - Ole Fejerskov
- Department of Biomedicine, Faculty of Health, Aarhus University, Aarhus,
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Pal VK, Bandyopadhyay P, Singh A. Hydrogen sulfide in physiology and pathogenesis of bacteria and viruses. IUBMB Life 2018; 70:393-410. [PMID: 29601123 PMCID: PMC6029659 DOI: 10.1002/iub.1740] [Citation(s) in RCA: 55] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2018] [Revised: 02/14/2018] [Accepted: 03/02/2018] [Indexed: 12/18/2022]
Abstract
An increasing number of studies have established hydrogen sulfide (H2S) gas as a major cytoprotectant and redox modulator. Following its discovery, H2S has been found to have pleiotropic effects on physiology and human health. H2S acts as a gasotransmitter and exerts its influence on gastrointestinal, neuronal, cardiovascular, respiratory, renal, and hepatic systems. Recent discoveries have clearly indicated the importance of H2S in regulating vasorelaxation, angiogenesis, apoptosis, ageing, and metabolism. Contrary to studies in higher organisms, the role of H2S in the pathophysiology of infectious agents such as bacteria and viruses has been less studied. Bacterial and viral infections are often accompanied by changes in the redox physiology of both the host and the pathogen. Emerging studies indicate that bacterial-derived H2S constitutes a defense system against antibiotics and oxidative stress. The H2S signaling pathway also seems to interfere with redox-based events affected on infection with viruses. This review aims to summarize recent advances on the emerging role of H2S gas in the bacterial physiology and viral infections. Such studies have opened up new research avenues exploiting H2S as a potential therapeutic intervention.
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Affiliation(s)
- Virender Kumar Pal
- Department of Microbiology and Cell Biology, Centre for Infectious Disease Research, Indian Institute of Science (IISc), Bangalore, India
| | - Parijat Bandyopadhyay
- Department of Microbiology and Cell Biology, Centre for Infectious Disease Research, Indian Institute of Science (IISc), Bangalore, India
| | - Amit Singh
- Department of Microbiology and Cell Biology, Centre for Infectious Disease Research, Indian Institute of Science (IISc), Bangalore, India
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28
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Szabo C. A timeline of hydrogen sulfide (H 2S) research: From environmental toxin to biological mediator. Biochem Pharmacol 2018; 149:5-19. [PMID: 28947277 PMCID: PMC5862769 DOI: 10.1016/j.bcp.2017.09.010] [Citation(s) in RCA: 155] [Impact Index Per Article: 25.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2017] [Accepted: 09/20/2017] [Indexed: 02/07/2023]
Abstract
The history of H2S - as an environmental toxin - dates back to 1700, to the observations of the Italian physician Bernardino Ramazzini, whose book "De Morbis Artificum Diatriba" described the painful eye irritation and inflammation of "sewer gas" in sewer workers. The gas has subsequently been identified as hydrogen sulfide (H2S), and opened three centuries of research into the biological roles of H2S. The current article highlights the key discoveries in the field of H2S research, including (a) the toxicological studies, which characterized H2S as an environmental toxin, and identified some of its modes of action, including the inhibition of mitochondrial respiration; (b) work in the field of bacteriology, which, starting in the early 1900s, identified H2S as a bacterial product - with subsequently defined roles in the regulation of periodontal disease (oral bacterial flora), intestinal epithelial cell function (enteral bacterial flora) as well as in the regulation of bacterial resistance to antibiotics; and (c), work in diverse fields of mammalian biology, which, starting in the 1940s, identified H2S as an endogenous mammalian enzymatic product, the functions of which - among others, in the cardiovascular and nervous system - have become subjects of intensive investigation for the last decade. The current review not only enumerates the key discoveries related to H2S made over the last three centuries, but also compiles the most frequently cited papers in the field which have been published over the last decade and highlights some of the current 'hot topics' in the field of H2S biology.
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Affiliation(s)
- Csaba Szabo
- Department of Anesthesiology, University of Texas Medical Branch, 301 University Boulevard, Galveston, TX 77555, USA.
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29
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LeBel G, Haas B, Adam AA, Veilleux MP, Lagha AB, Grenier D. Effect of cinnamon (Cinnamomum verum) bark essential oil on the halitosis-associated bacterium Solobacterium moorei and in vitro cytotoxicity. Arch Oral Biol 2017; 83:97-104. [DOI: 10.1016/j.archoralbio.2017.07.005] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2017] [Revised: 07/04/2017] [Accepted: 07/09/2017] [Indexed: 01/04/2023]
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30
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Basic A, Alizadehgharib S, Dahlén G, Dahlgren U. Hydrogen sulfide exposure induces NLRP3 inflammasome-dependent IL-1β and IL-18 secretion in human mononuclear leukocytes in vitro. Clin Exp Dent Res 2017; 3:115-120. [PMID: 29744188 PMCID: PMC5719819 DOI: 10.1002/cre2.69] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2017] [Revised: 04/21/2017] [Accepted: 04/24/2017] [Indexed: 12/28/2022] Open
Abstract
The aim was to investigate if hydrogen sulfide (H2S) induces the formation of the NLRP3 inflammasome and subsequent IL‐1β and IL‐18 secretion in human peripheral blood mononuclear cells (PBMCs) and in the human monocyte cell line THP1. Bacterial production of H2S has been suggested to participate in the inflammatory host response in periodontitis pathogenesis. H2S is a toxic gas with pro‐inflammatory properties. It is produced by bacterial degradation of sulfur‐containing amino acids, for example, cysteine. We hypothesize that H2S affects the inflammatory host response by inducing formation of the NLRP3 inflammasome and thereby causes the secretion of IL‐1ß and IL‐18. PBMCs from eight healthy blood donors, the human monocyte cell line THP1 Null, and two variants of the THP1 cell line unable to form the NLRP3 inflammasome were cultured in the presence or absence of 1 mM sodium hydrosulfide (NaHS) in 24‐well plates at 37°C for 24 hr. Supernatants were collected and the IL‐1β and IL‐18 concentrations were measured with DuoSet ELISA Development kit. PBMCs exposed to NaHS produced more IL‐1ß and IL‐18 than unexposed control cells (p = .023 and p = .008, respectively). An increase of extracellular potassium ions (K+) inhibited the secretion of IL‐1ß and IL‐18 (p = .008). Further, NaHS triggered the secretion of IL‐1ß and IL‐18 in human THP1‐Null monocytes (p = .0006 and p = .002, respectively), while the NaHS‐dependent secretion was reduced in the monocyte cell lines unable to form the NLRP3 inflammasome. Hence, the results suggest that NaHS induces the formation of the NLRP3 inflammasome and thus the secretion of IL‐1ß and IL‐18. Enhanced NLRP3 inflammasome‐dependent secretion of IL‐1β and IL‐18 in human mononuclear leukocytes exposed to NaHS in vitro is reported. This may be a mode for H2S to contribute to the inflammatory host response and pathogenesis of periodontal disease.
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Affiliation(s)
- Amina Basic
- Department of Oral Microbiology and Immunology Institute of Odontology, Sahlgrenska Academy, University of Gothenburg Sweden
| | - Sara Alizadehgharib
- Department of Oral Microbiology and Immunology Institute of Odontology, Sahlgrenska Academy, University of Gothenburg Sweden
| | - Gunnar Dahlén
- Department of Oral Microbiology and Immunology Institute of Odontology, Sahlgrenska Academy, University of Gothenburg Sweden
| | - Ulf Dahlgren
- Department of Oral Microbiology and Immunology Institute of Odontology, Sahlgrenska Academy, University of Gothenburg Sweden
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Basic A, Blomqvist M, Dahlén G, Svensäter G. The proteins of Fusobacterium spp. involved in hydrogen sulfide production from L-cysteine. BMC Microbiol 2017; 17:61. [PMID: 28288582 PMCID: PMC5348791 DOI: 10.1186/s12866-017-0967-9] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2016] [Accepted: 03/01/2017] [Indexed: 01/10/2023] Open
Abstract
BACKGROUND Hydrogen sulfide (H2S) is a toxic foul-smelling gas produced by subgingival biofilms in patients with periodontal disease and is suggested to be part of the pathogenesis of the disease. We studied the H2S-producing protein expression of bacterial strains associated with periodontal disease. Further, we examined the effect of a cysteine-rich growth environment on the synthesis of intracellular enzymes in F. nucleatum polymorphum ATCC 10953. The proteins were subjected to one-dimensional (1DE) and two-dimensional (2DE) gel electrophoresis An in-gel activity assay was used to detect the H2S-producing enzymes; Sulfide from H2S, produced by the enzymes in the gel, reacted with bismuth forming bismuth sulfide, illustrated as brown bands (1D) or spots (2D) in the gel. The discovered proteins were identified with liquid chromatography - tandem mass spectrometry (LC-MS/MS). RESULTS Cysteine synthase and proteins involved in the production of the coenzyme pyridoxal 5'phosphate (that catalyzes the production of H2S) were frequently found among the discovered enzymes. Interestingly, a higher expression of H2S-producing enzymes was detected from bacteria incubated without cysteine prior to the experiment. CONCLUSIONS Numerous enzymes, identified as cysteine synthase, were involved in the production of H2S from cysteine and the expression varied among Fusobacterium spp. and strains. No enzymes were detected with the in-gel activity assay among the other periodontitis-associated bacteria tested. The expression of the H2S-producing enzymes was dependent on environmental conditions such as cysteine concentration and pH but less dependent on the presence of serum and hemin.
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Affiliation(s)
- Amina Basic
- Department of Oral Microbiology and Immunology, Institute of Odontology, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden.
| | - Madeleine Blomqvist
- Department of Oral Biology, Institute of Odontology, Malmö University, Malmö, Sweden
| | - Gunnar Dahlén
- Department of Oral Microbiology and Immunology, Institute of Odontology, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - Gunnel Svensäter
- Department of Oral Biology, Institute of Odontology, Malmö University, Malmö, Sweden
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Kato I, Vasquez A, Moyerbrailean G, Land S, Djuric Z, Sun J, Lin HS, Ram JL. Nutritional Correlates of Human Oral Microbiome. J Am Coll Nutr 2017; 36:88-98. [PMID: 27797671 PMCID: PMC5477991 DOI: 10.1080/07315724.2016.1185386] [Citation(s) in RCA: 68] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
BACKGROUND Despite many potential effects of the oral microbiome on oral and systemic health, scant information is available regarding the associations between diet and the oral microbiome. METHODS Oral rinse DNA samples from 182 participants in a population-based case-control study for colorectal cancer were used to amplify a V3-V4 region of bacterial 16S rRNA gene. The amplicons were sequenced using Illumina MiSeq paired end chemistry on 2 runs, yielding approximately 33 million filtered reads that were assigned to bacterial classes. Relative abundances of each class and family as well microbial diversity/richness indices were correlated with selected dietary intakes from a food frequency questionnaire. RESULTS Saturated fatty acids (SFAs) and vitamin C intakes were consistently correlated with alpha (within-subjects) diversity indexes in both richness and diversity. SFA intake was positively correlated with relative abundance of betaproteobacteria and fusobacteria. Vitamin C and other vitamins with correlated intakes-for example, the B vitamins and vitamin E-exhibited positive correlations with fusobacteria class, its family Leptotrichiaceae and a clostridia family Lachnospiraceae. In addition, glycemic load was positively correlated with Lactobacillaceae abundance. CONCLUSION The observed associations in this study were modest. However, the results suggest that the effects of diets are likely to be habitat specific, and observations from the gut microbiome are not transferrable to the oral microbiome. Further studies are warranted, incorporating a range of host biomarkers, such as cytohistological, molecular, or biochemical measurements, in order to address biological consequences of these dietary intakes in human oral health.
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Affiliation(s)
- Ikuko Kato
- a Department of Oncology , Wayne State University School of Medicine , Detroit , Michigan
- b Department of Pathology , Wayne State University School of Medicine , Detroit , Michigan
| | - Adrian Vasquez
- c Department of Physiology , Wayne State University School of Medicine , Detroit , Michigan
| | - Gregory Moyerbrailean
- d Center for Molecular Medicine and Genetics , Wayne State University School of Medicine , Detroit , Michigan
| | - Susan Land
- a Department of Oncology , Wayne State University School of Medicine , Detroit , Michigan
| | - Zora Djuric
- f Department of Family Medicine and Comprehensive Cancer Center , University of Michigan , Ann Arbor , Michigan
| | - Jun Sun
- g Department of Medicine, School of Medicine , University of Illinois at Chicago , Chicago , Illinois
| | - Ho-Sheng Lin
- e Department of Otolaryngology , Wayne State University School of Medicine , Detroit , Michigan
| | - Jeffrey L Ram
- c Department of Physiology , Wayne State University School of Medicine , Detroit , Michigan
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