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Interplay and cooperation of Helicobacter pylori and gut microbiota in gastric carcinogenesis. BMC Microbiol 2021; 21:258. [PMID: 34556055 PMCID: PMC8461988 DOI: 10.1186/s12866-021-02315-x] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2021] [Accepted: 09/07/2021] [Indexed: 01/10/2023] Open
Abstract
Chronic Helicobacter pylori infection is a critical risk factor for gastric cancer (GC). However, only 1–3 % of people with H. pylori develop GC. In gastric carcinogenesis, non-H. pylori bacteria in the stomach might interact with H. pylori. Bacterial dysbiosis in the stomach can strengthen gastric neoplasia development via generating tumor-promoting metabolites, DNA damaging, suppressing antitumor immunity, and activating oncogenic signaling pathways. Other bacterial species may generate short-chain fatty acids like butyrate that may inhibit carcinogenesis and inflammation in the human stomach. The present article aimed at providing a comprehensive overview of the effects of gut microbiota and H. pylori on the development of GC. Next, the potential mechanisms of intestinal microbiota were discussed in gastric carcinogenesis. We also disserted the complicated interactions between H. pylori, intestinal microbiota, and host in gastric carcinogenesis, thus helping us to design new strategies for preventing, diagnosing, and treating GC.
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Palrasu M, Zaika E, El-Rifai W, Que J, Zaika AI. Role of Bacterial and Viral Pathogens in Gastric Carcinogenesis. Cancers (Basel) 2021; 13:1878. [PMID: 33919876 PMCID: PMC8070847 DOI: 10.3390/cancers13081878] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2021] [Revised: 04/02/2021] [Accepted: 04/11/2021] [Indexed: 01/10/2023] Open
Abstract
Gastric cancer (GC) is one of the deadliest malignancies worldwide. In contrast to many other tumor types, gastric carcinogenesis is tightly linked to infectious events. Infections with Helicobacter pylori (H. pylori) bacterium and Epstein-Barr virus (EBV) are the two most investigated risk factors for GC. These pathogens infect more than half of the world's population. Fortunately, only a small fraction of infected individuals develops GC, suggesting high complexity of tumorigenic processes in the human stomach. Recent studies suggest that the multifaceted interplay between microbial, environmental, and host genetic factors underlies gastric tumorigenesis. Many aspects of these interactions still remain unclear. In this review, we update on recent discoveries, focusing on the roles of various gastric pathogens and gastric microbiome in tumorigenesis.
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Affiliation(s)
- Manikandan Palrasu
- Department of Surgery, University of Miami, Miami, FL 33136, USA; (M.P.); (E.Z.); (W.E.-R.)
| | - Elena Zaika
- Department of Surgery, University of Miami, Miami, FL 33136, USA; (M.P.); (E.Z.); (W.E.-R.)
| | - Wael El-Rifai
- Department of Surgery, University of Miami, Miami, FL 33136, USA; (M.P.); (E.Z.); (W.E.-R.)
- Department of Veterans Affairs, Miami VA Healthcare System, Miami, FL 33136, USA
| | - Jianwen Que
- Department of Medicine, Columbia University Medical Center, New York, NY 10032, USA;
| | - Alexander I. Zaika
- Department of Surgery, University of Miami, Miami, FL 33136, USA; (M.P.); (E.Z.); (W.E.-R.)
- Department of Veterans Affairs, Miami VA Healthcare System, Miami, FL 33136, USA
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Bakhti SZ, Latifi-Navid S. Oral microbiota and Helicobacter pylori in gastric carcinogenesis: what do we know and where next? BMC Microbiol 2021; 21:71. [PMID: 33663382 PMCID: PMC7934379 DOI: 10.1186/s12866-021-02130-4] [Citation(s) in RCA: 30] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2020] [Accepted: 02/21/2021] [Indexed: 02/06/2023] Open
Abstract
Gastric cancer (GC) is one of the most common malignancies causing death worldwide, and Helicobacter pylori is a powerful inducer of precancerous lesions and GC. The oral microbiota is a complex ecosystem and is responsible for maintaining homeostasis, modulating the immune system, and resisting pathogens. It has been proposed that the gastric microbiota of oral origin is involved in the development and progression of GC. Nevertheless, the causal relationship between oral microbiota and GC and the role of H. pylori in this relationship is still controversial. This study was set to review the investigations done on oral microbiota and analyze various lines of evidence regarding the role of oral microbiota in GC, to date. Also, we discussed the interaction and relationship between H. pylori and oral microbiota in GC and the current understanding with regard to the underlying mechanisms of oral microbiota in carcinogenesis. More importantly, detecting the patterns of interaction between the oral cavity microbiota and H. pylori may render new clues for the diagnosis or screening of cancer. Integration of oral microbiota and H. pylori might manifest a potential method for the assessment of GC risk. Hence it needs to be specified the patterns of bacterial transmission from the oral cavity to the stomach and their interaction. Further evidence on the mechanisms underlying the oral microbiota communities and how they trigger GC may contribute to the identification of new prevention methods for GC. We may then modulate the oral microbiota by intervening with oral-gastric bacterial transmission or controlling certain bacteria in the oral cavity.
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Affiliation(s)
- Seyedeh Zahra Bakhti
- Department of Biology, Faculty of Sciences, University of Mohaghegh Ardabili, Ardabil, 56199-11367, Iran
| | - Saeid Latifi-Navid
- Department of Biology, Faculty of Sciences, University of Mohaghegh Ardabili, Ardabil, 56199-11367, Iran.
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Gorlé N, Bauwens E, Haesebrouck F, Smet A, Vandenbroucke RE. Helicobacter and the Potential Role in Neurological Disorders: There Is More Than Helicobacter pylori. Front Immunol 2021; 11:584165. [PMID: 33633723 PMCID: PMC7901999 DOI: 10.3389/fimmu.2020.584165] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2020] [Accepted: 12/04/2020] [Indexed: 12/17/2022] Open
Abstract
Trillions of symbiotic microbial cells colonize our body, of which the larger part is present in the human gut. These microbes play an essential role in our health and a shift in the microbiome is linked to several diseases. Recent studies also suggest a link between changes in gut microbiota and neurological disorders. Gut microbiota can communicate with the brain via several routes, together called the microbiome–gut–brain axis: the neuronal route, the endocrine route, the metabolic route and the immunological route. Helicobacter is a genus of Gram-negative bacteria colonizing the stomach, intestine and liver. Several papers show the role of H. pylori in the development and progression of neurological disorders, while hardly anything is known about other Helicobacter species and the brain. We recently reported a high prevalence of H. suis in patients with Parkinson’s disease and showed an effect of a gastric H. suis infection on the mouse brain homeostasis. Here, we discuss the potential role of H. suis in neurological disorders and how it may affect the brain via the microbiome–gut–brain axis.
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Affiliation(s)
- Nina Gorlé
- VIB Center for Inflammation Research, Ghent, Belgium.,Department of Biomedical Molecular Biology, Faculty of Sciences, Ghent University, Ghent, Belgium
| | - Eva Bauwens
- Department of Pathology, Bacteriology and Avian Diseases, Faculty of Veterinary Medicine, Ghent University, Merelbeke, Belgium
| | - Freddy Haesebrouck
- Department of Pathology, Bacteriology and Avian Diseases, Faculty of Veterinary Medicine, Ghent University, Merelbeke, Belgium
| | - Annemieke Smet
- Laboratory of Experimental Medicine and Pediatrics, Faculty of Medicine and Health Sciences, University of Antwerp, Antwerp, Belgium
| | - Roosmarijn E Vandenbroucke
- VIB Center for Inflammation Research, Ghent, Belgium.,Department of Biomedical Molecular Biology, Faculty of Sciences, Ghent University, Ghent, Belgium
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Abstract
Owing to its strong acid production, the stomach was known to be a bacteria-free organ for many years. On the other hand, the presence of Helicobacter pylori (H. pylori) and other acid-resistant microbiota that are to persist in the stomach challenged this. It is now recognized that the existence of H. pylori and non-H. pylori species have been linked to the improvement of gastric disease; despite this, there is little published data on the interaction of gastric bacterial flora and the resultant effect on gastric health. The stomach has a unique microbiota including five major phyla, such as Firmicutes, Proteobacteria, Actinobacteria, Fusobacteria and Bacteroidetes. These phyla are identified in both H. pylori-infected and uninfected persons. The resident gastric microflora may mediate the role of H. pylori in the gastric diseases. This article aims to review previous studies that examine the impact of H. pylori infection and the effect of resident gastric microbiota on gut health and disease conditions. HOW TO CITE THIS ARTICLE Ozbey G, Sproston E, Hanafiah A. Helicobacter pylori Infection and Gastric Microbiota. Euroasian J Hepato-Gastroenterol 2020;10(1):36-41.
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Affiliation(s)
- Gokben Ozbey
- Department of Medical Services and Techniques, Vocational School of Health Services, Firat University, Elazig, Turkey
| | - Emma Sproston
- Department of Biology and Biochemistry, School of Biological Sciences, University of Aberdeen, Aberdeen, United Kingdom
| | - Alfizah Hanafiah
- Department of Medical Microbiology and Immunology, Faculty of Medicine, Universiti Kebangsaan Malaysia, Kuala Lumpur, Malaysia
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De Witte C, Taminiau B, Flahou B, Hautekiet V, Daube G, Ducatelle R, Haesebrouck F. In-feed bambermycin medication induces anti-inflammatory effects and prevents parietal cell loss without influencing Helicobacter suis colonization in the stomach of mice. Vet Res 2018; 49:35. [PMID: 29636083 PMCID: PMC5894178 DOI: 10.1186/s13567-018-0530-1] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2018] [Accepted: 03/21/2018] [Indexed: 12/18/2022] Open
Abstract
The minimum inhibitory concentration of bambermycin on three porcine Helicobacter suis strains was shown to be 8 μg/mL. The effect of in-feed medication with this antibiotic on the course of a gastric infection with one of these strains, the host response and the gastric microbiota was determined in mice, as all of these parameters may be involved in gastric pathology. In H. suis infected mice which were not treated with bambermycin, an increased number of infiltrating B-cells, T-cells and macrophages in combination with a Th2 response was demonstrated, as well as a decreased parietal cell mass. Compared to this non-treated, infected group, in H. suis infected mice medicated with bambermycin, gastric H. suis colonization was not altered, but a decreased number of infiltrating T-cells, B-cells and macrophages as well as downregulated expressions of IL-1β, IL-8M, IL-10 and IFN-γ were demonstrated and the parietal cell mass was not affected. In bambermycin treated mice that were not infected with H. suis, the number of infiltrating T-cells and expression of IL-1β were lower than in non-infected mice that did not receive bambermycin. Gastric microbiota analysis indicated that the relative abundance of bacteria that might exert unfavorable effects on the host was decreased during bambermycin supplementation. In conclusion, bambermycin did not affect H. suis colonization, but decreased gastric inflammation and inhibited the effects of a H. suis infection on parietal cell loss. Not only direct interaction of H. suis with parietal cells, but also inflammation may play a role in death of these gastric acid producing cells.
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Affiliation(s)
- Chloë De Witte
- Department of Pathology, Bacteriology and Avian Diseases, Faculty of Veterinary Medicine, Ghent University, Merelbeke, Belgium.
| | - Bernard Taminiau
- Department of Food Sciences, FARAH, Université de Liège, Avenue de Cureghem 10, 4000, Liège, Belgium
| | - Bram Flahou
- Department of Pathology, Bacteriology and Avian Diseases, Faculty of Veterinary Medicine, Ghent University, Merelbeke, Belgium
| | | | - Georges Daube
- Department of Food Sciences, FARAH, Université de Liège, Avenue de Cureghem 10, 4000, Liège, Belgium
| | - Richard Ducatelle
- Department of Pathology, Bacteriology and Avian Diseases, Faculty of Veterinary Medicine, Ghent University, Merelbeke, Belgium
| | - Freddy Haesebrouck
- Department of Pathology, Bacteriology and Avian Diseases, Faculty of Veterinary Medicine, Ghent University, Merelbeke, Belgium.
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Wymore Brand M, Wannemuehler MJ, Phillips GJ, Proctor A, Overstreet AM, Jergens AE, Orcutt RP, Fox JG. The Altered Schaedler Flora: Continued Applications of a Defined Murine Microbial Community. ILAR J 2016; 56:169-78. [PMID: 26323627 DOI: 10.1093/ilar/ilv012] [Citation(s) in RCA: 139] [Impact Index Per Article: 17.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
The gastrointestinal (GI) microbiota forms a mutualistic relationship with the host through complex and dynamic interactions. Because of the complexity and interindividual variation of the GI microbiota, investigating how members of the microbiota interact with each other, as well as with the host, is daunting. The altered Schaedler flora (ASF) is a model community of eight microorganisms that was developed by R.P. Orcutt and has been in use since the late 1970s. The eight microorganisms composing the ASF were all derived from mice, can be cultured in vitro, and are stably passed through multiple generations (at least 15 years or more by the authors) in gnotobiotic mice continually bred in isolator facilities. With the limitations associated with conventional, mono- or biassociated, and germfree mice, use of mice colonized with a consortium of known bacteria that naturally inhabit the murine gut offers a powerful system to investigate mechanisms governing host-microbiota relationships, and how members of the GI microbiota interact with one another. The ASF community offers significant advantages to study homeostatic as well as disease-related interactions by taking advantage of a well-defined, limited community of microorganisms. For example, quantification and spatial distribution of individual members, microbial genetic manipulation, genomic-scale analysis, and identification of microorganism-specific host immune responses are all achievable using the ASF model. This review compiles highlights associated with the 37-year history of the ASF, including descriptions of its continued use in biomedical research to elucidate the complexities of host-microbiome interactions in health and disease.
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Affiliation(s)
- Meghan Wymore Brand
- Meghan Wymore Brand, DVM, is a graduate student in the Department of Veterinary Microbiology and Preventive Medicine at the College of Veterinary Medicine at Iowa State University in Ames, Iowa. Michael J. Wannemuehler, MS, PhD, is Professor and Chair in the Department of Veterinary Microbiology and Preventive Medicine at the College of Veterinary Medicine at Iowa State University in Ames, Iowa. Gregory J. Phillips, MA, PhD, is a professor in the Department of Veterinary Microbiology and Preventive Medicine at the College of Veterinary Medicine at Iowa State University in Ames, Iowa. Alexandra Proctor is a graduate student in the Department of Veterinary Microbiology and Preventive Medicine at the College of Veterinary Medicine at Iowa State University in Ames, Iowa. Anne-Marie Overstreet, PhD, is a postdoctoral fellow in the Department of Microbiology and Immunology at Indiana University School of Medicine-South Bend in South Bend, Indiana. Albert E. Jergens, DVM, MS, PhD, is Professor and Associate Chair for Research and Graduate Studies in the Department of Veterinary Clinical Sciences at the College of Veterinary Medicine at Iowa State University in Ames, Iowa. Roger P. Orcutt, PhD, is a consultant at Biomedical Research Associates in Dunkirk, New York. James G. Fox, MS, DVM, is Director of the Division of Comparative Medicine and Professor in the Department of Biological Engineering at Massachusetts Institute of Technology in Cambridge, Massachusetts
| | - Michael J Wannemuehler
- Meghan Wymore Brand, DVM, is a graduate student in the Department of Veterinary Microbiology and Preventive Medicine at the College of Veterinary Medicine at Iowa State University in Ames, Iowa. Michael J. Wannemuehler, MS, PhD, is Professor and Chair in the Department of Veterinary Microbiology and Preventive Medicine at the College of Veterinary Medicine at Iowa State University in Ames, Iowa. Gregory J. Phillips, MA, PhD, is a professor in the Department of Veterinary Microbiology and Preventive Medicine at the College of Veterinary Medicine at Iowa State University in Ames, Iowa. Alexandra Proctor is a graduate student in the Department of Veterinary Microbiology and Preventive Medicine at the College of Veterinary Medicine at Iowa State University in Ames, Iowa. Anne-Marie Overstreet, PhD, is a postdoctoral fellow in the Department of Microbiology and Immunology at Indiana University School of Medicine-South Bend in South Bend, Indiana. Albert E. Jergens, DVM, MS, PhD, is Professor and Associate Chair for Research and Graduate Studies in the Department of Veterinary Clinical Sciences at the College of Veterinary Medicine at Iowa State University in Ames, Iowa. Roger P. Orcutt, PhD, is a consultant at Biomedical Research Associates in Dunkirk, New York. James G. Fox, MS, DVM, is Director of the Division of Comparative Medicine and Professor in the Department of Biological Engineering at Massachusetts Institute of Technology in Cambridge, Massachusetts
| | - Gregory J Phillips
- Meghan Wymore Brand, DVM, is a graduate student in the Department of Veterinary Microbiology and Preventive Medicine at the College of Veterinary Medicine at Iowa State University in Ames, Iowa. Michael J. Wannemuehler, MS, PhD, is Professor and Chair in the Department of Veterinary Microbiology and Preventive Medicine at the College of Veterinary Medicine at Iowa State University in Ames, Iowa. Gregory J. Phillips, MA, PhD, is a professor in the Department of Veterinary Microbiology and Preventive Medicine at the College of Veterinary Medicine at Iowa State University in Ames, Iowa. Alexandra Proctor is a graduate student in the Department of Veterinary Microbiology and Preventive Medicine at the College of Veterinary Medicine at Iowa State University in Ames, Iowa. Anne-Marie Overstreet, PhD, is a postdoctoral fellow in the Department of Microbiology and Immunology at Indiana University School of Medicine-South Bend in South Bend, Indiana. Albert E. Jergens, DVM, MS, PhD, is Professor and Associate Chair for Research and Graduate Studies in the Department of Veterinary Clinical Sciences at the College of Veterinary Medicine at Iowa State University in Ames, Iowa. Roger P. Orcutt, PhD, is a consultant at Biomedical Research Associates in Dunkirk, New York. James G. Fox, MS, DVM, is Director of the Division of Comparative Medicine and Professor in the Department of Biological Engineering at Massachusetts Institute of Technology in Cambridge, Massachusetts
| | - Alexandra Proctor
- Meghan Wymore Brand, DVM, is a graduate student in the Department of Veterinary Microbiology and Preventive Medicine at the College of Veterinary Medicine at Iowa State University in Ames, Iowa. Michael J. Wannemuehler, MS, PhD, is Professor and Chair in the Department of Veterinary Microbiology and Preventive Medicine at the College of Veterinary Medicine at Iowa State University in Ames, Iowa. Gregory J. Phillips, MA, PhD, is a professor in the Department of Veterinary Microbiology and Preventive Medicine at the College of Veterinary Medicine at Iowa State University in Ames, Iowa. Alexandra Proctor is a graduate student in the Department of Veterinary Microbiology and Preventive Medicine at the College of Veterinary Medicine at Iowa State University in Ames, Iowa. Anne-Marie Overstreet, PhD, is a postdoctoral fellow in the Department of Microbiology and Immunology at Indiana University School of Medicine-South Bend in South Bend, Indiana. Albert E. Jergens, DVM, MS, PhD, is Professor and Associate Chair for Research and Graduate Studies in the Department of Veterinary Clinical Sciences at the College of Veterinary Medicine at Iowa State University in Ames, Iowa. Roger P. Orcutt, PhD, is a consultant at Biomedical Research Associates in Dunkirk, New York. James G. Fox, MS, DVM, is Director of the Division of Comparative Medicine and Professor in the Department of Biological Engineering at Massachusetts Institute of Technology in Cambridge, Massachusetts
| | - Anne-Marie Overstreet
- Meghan Wymore Brand, DVM, is a graduate student in the Department of Veterinary Microbiology and Preventive Medicine at the College of Veterinary Medicine at Iowa State University in Ames, Iowa. Michael J. Wannemuehler, MS, PhD, is Professor and Chair in the Department of Veterinary Microbiology and Preventive Medicine at the College of Veterinary Medicine at Iowa State University in Ames, Iowa. Gregory J. Phillips, MA, PhD, is a professor in the Department of Veterinary Microbiology and Preventive Medicine at the College of Veterinary Medicine at Iowa State University in Ames, Iowa. Alexandra Proctor is a graduate student in the Department of Veterinary Microbiology and Preventive Medicine at the College of Veterinary Medicine at Iowa State University in Ames, Iowa. Anne-Marie Overstreet, PhD, is a postdoctoral fellow in the Department of Microbiology and Immunology at Indiana University School of Medicine-South Bend in South Bend, Indiana. Albert E. Jergens, DVM, MS, PhD, is Professor and Associate Chair for Research and Graduate Studies in the Department of Veterinary Clinical Sciences at the College of Veterinary Medicine at Iowa State University in Ames, Iowa. Roger P. Orcutt, PhD, is a consultant at Biomedical Research Associates in Dunkirk, New York. James G. Fox, MS, DVM, is Director of the Division of Comparative Medicine and Professor in the Department of Biological Engineering at Massachusetts Institute of Technology in Cambridge, Massachusetts
| | - Albert E Jergens
- Meghan Wymore Brand, DVM, is a graduate student in the Department of Veterinary Microbiology and Preventive Medicine at the College of Veterinary Medicine at Iowa State University in Ames, Iowa. Michael J. Wannemuehler, MS, PhD, is Professor and Chair in the Department of Veterinary Microbiology and Preventive Medicine at the College of Veterinary Medicine at Iowa State University in Ames, Iowa. Gregory J. Phillips, MA, PhD, is a professor in the Department of Veterinary Microbiology and Preventive Medicine at the College of Veterinary Medicine at Iowa State University in Ames, Iowa. Alexandra Proctor is a graduate student in the Department of Veterinary Microbiology and Preventive Medicine at the College of Veterinary Medicine at Iowa State University in Ames, Iowa. Anne-Marie Overstreet, PhD, is a postdoctoral fellow in the Department of Microbiology and Immunology at Indiana University School of Medicine-South Bend in South Bend, Indiana. Albert E. Jergens, DVM, MS, PhD, is Professor and Associate Chair for Research and Graduate Studies in the Department of Veterinary Clinical Sciences at the College of Veterinary Medicine at Iowa State University in Ames, Iowa. Roger P. Orcutt, PhD, is a consultant at Biomedical Research Associates in Dunkirk, New York. James G. Fox, MS, DVM, is Director of the Division of Comparative Medicine and Professor in the Department of Biological Engineering at Massachusetts Institute of Technology in Cambridge, Massachusetts
| | - Roger P Orcutt
- Meghan Wymore Brand, DVM, is a graduate student in the Department of Veterinary Microbiology and Preventive Medicine at the College of Veterinary Medicine at Iowa State University in Ames, Iowa. Michael J. Wannemuehler, MS, PhD, is Professor and Chair in the Department of Veterinary Microbiology and Preventive Medicine at the College of Veterinary Medicine at Iowa State University in Ames, Iowa. Gregory J. Phillips, MA, PhD, is a professor in the Department of Veterinary Microbiology and Preventive Medicine at the College of Veterinary Medicine at Iowa State University in Ames, Iowa. Alexandra Proctor is a graduate student in the Department of Veterinary Microbiology and Preventive Medicine at the College of Veterinary Medicine at Iowa State University in Ames, Iowa. Anne-Marie Overstreet, PhD, is a postdoctoral fellow in the Department of Microbiology and Immunology at Indiana University School of Medicine-South Bend in South Bend, Indiana. Albert E. Jergens, DVM, MS, PhD, is Professor and Associate Chair for Research and Graduate Studies in the Department of Veterinary Clinical Sciences at the College of Veterinary Medicine at Iowa State University in Ames, Iowa. Roger P. Orcutt, PhD, is a consultant at Biomedical Research Associates in Dunkirk, New York. James G. Fox, MS, DVM, is Director of the Division of Comparative Medicine and Professor in the Department of Biological Engineering at Massachusetts Institute of Technology in Cambridge, Massachusetts
| | - James G Fox
- Meghan Wymore Brand, DVM, is a graduate student in the Department of Veterinary Microbiology and Preventive Medicine at the College of Veterinary Medicine at Iowa State University in Ames, Iowa. Michael J. Wannemuehler, MS, PhD, is Professor and Chair in the Department of Veterinary Microbiology and Preventive Medicine at the College of Veterinary Medicine at Iowa State University in Ames, Iowa. Gregory J. Phillips, MA, PhD, is a professor in the Department of Veterinary Microbiology and Preventive Medicine at the College of Veterinary Medicine at Iowa State University in Ames, Iowa. Alexandra Proctor is a graduate student in the Department of Veterinary Microbiology and Preventive Medicine at the College of Veterinary Medicine at Iowa State University in Ames, Iowa. Anne-Marie Overstreet, PhD, is a postdoctoral fellow in the Department of Microbiology and Immunology at Indiana University School of Medicine-South Bend in South Bend, Indiana. Albert E. Jergens, DVM, MS, PhD, is Professor and Associate Chair for Research and Graduate Studies in the Department of Veterinary Clinical Sciences at the College of Veterinary Medicine at Iowa State University in Ames, Iowa. Roger P. Orcutt, PhD, is a consultant at Biomedical Research Associates in Dunkirk, New York. James G. Fox, MS, DVM, is Director of the Division of Comparative Medicine and Professor in the Department of Biological Engineering at Massachusetts Institute of Technology in Cambridge, Massachusetts
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Gao Z, Kang Y, Yu J, Ren L. Human pharyngeal microbiome may play a protective role in respiratory tract infections. GENOMICS PROTEOMICS & BIOINFORMATICS 2014; 12:144-50. [PMID: 24953866 PMCID: PMC4411333 DOI: 10.1016/j.gpb.2014.06.001] [Citation(s) in RCA: 55] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/30/2014] [Revised: 05/28/2014] [Accepted: 06/09/2014] [Indexed: 12/17/2022]
Abstract
The human pharyngeal microbiome, which resides at the juncture of digestive and respiratory tracts, may have an active role in the prevention of respiratory tract infections, similar to the actions of the intestinal microbiome against enteric infections. Recent studies have demonstrated that the pharyngeal microbiome comprises an abundance of bacterial species that interacts with the local epithelial and immune cells, and together, they form a unique micro-ecological system. Most of the microbial species in microbiomes are obligate symbionts constantly adapting to their unique surroundings. Indigenous commensal species are capable of both maintaining dominance and evoking host immune responses to eliminate invading species. Temporary damage to the pharyngeal microbiome due to the impaired local epithelia is also considered an important predisposing risk factor for infections. Therefore, reinforcement of microbiome homeostasis to prevent invasion of infection-prone species would provide a novel treatment strategy in addition to antibiotic treatment and vaccination. Hence continued research efforts on evaluating probiotic treatment and developing appropriate procedures are necessary to both prevent and treat respiratory infections.
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Affiliation(s)
- Zhancheng Gao
- Department of Respiratory and Critical Care Medicine, Peking University People's Hospital, Beijing 100044, China.
| | - Yu Kang
- CAS Key Laboratory of Genome Sciences and Information, Beijing Institute of Genomics, Chinese Academy of Sciences, Beijing 100101, China
| | - Jun Yu
- CAS Key Laboratory of Genome Sciences and Information, Beijing Institute of Genomics, Chinese Academy of Sciences, Beijing 100101, China
| | - Lufeng Ren
- CAS Key Laboratory of Genome Sciences and Information, Beijing Institute of Genomics, Chinese Academy of Sciences, Beijing 100101, China
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Martin ME, Solnick JV. The gastric microbial community, Helicobacter pylori colonization, and disease. Gut Microbes 2014; 5:345-50. [PMID: 24642475 PMCID: PMC4153772 DOI: 10.4161/gmic.28573] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/03/2023] Open
Abstract
Long thought to be a sterile habitat, the stomach contains a diverse and unique community of bacteria. One particular inhabitant, Helicobacter pylori, colonizes half of the world's human population and establishes a decades-long infection that can be asymptomatic, pathogenic, or even beneficial for the host. Many host and bacterial factors are known to influence an individual's risk of gastric disease, but another potentially important determinant has recently come to light: the host microbiota. Although it is unclear to what extent H. pylori infection perturbs the established gastric microbial community, and H. pylori colonization seems generally resistant to disturbances in the host microbiota, it can modulate H. pylori pathogenicity. Interactions between H. pylori and bacteria at non-gastric sites are likely indirect--via programming of the pro-inflammatory vs. regulatory T lymphocytes--which may have a significant impact on human health.
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Affiliation(s)
- Miriam E Martin
- Department of Medicine; University of California-Davis; Davis, CA USA,Department of Microbiology & Immunology; University of California-Davis; Davis, CA USA
| | - Jay V Solnick
- Department of Medicine; University of California-Davis; Davis, CA USA,Department of Microbiology & Immunology; University of California-Davis; Davis, CA USA,California National Primate Research Center; University of California-Davis; Davis, CA USA,Correspondence to: Jay V Solnick,
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10
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Wolf KJ, Daft JG, Tanner SM, Hartmann R, Khafipour E, Lorenz RG. Consumption of acidic water alters the gut microbiome and decreases the risk of diabetes in NOD mice. J Histochem Cytochem 2014; 62:237-50. [PMID: 24453191 PMCID: PMC3966285 DOI: 10.1369/0022155413519650] [Citation(s) in RCA: 59] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2013] [Accepted: 10/25/2013] [Indexed: 02/06/2023] Open
Abstract
Infant formula and breastfeeding are environmental factors that influence the incidence of Type 1 Diabetes (T1D) as well as the acidity of newborn diets. To determine if altering the intestinal microbiome is one mechanism through which an acidic liquid plays a role in T1D, we placed non-obese diabetic (NOD)/ShiLtJt mice on neutral (N) or acidified H2O and monitored the impact on microbial composition and diabetes incidence. NOD-N mice showed an increased development of diabetes, while exhibiting a decrease in Firmicutes and an increase in Bacteroidetes, Actinobacteria, and Proteobacteria from as early as 2 weeks of age. NOD-N mice had a decrease in the levels of Foxp3 expression in CD4(+)Foxp3(+) cells, as well as decreased CD4(+)IL17(+) cells, and a lower ratio of IL17/IFNγ CD4+ T-cells. Our data clearly indicates that a change in the acidity of liquids consumed dramatically alters the intestinal microbiome, the presence of protective Th17 and Treg cells, and the incidence of diabetes. This data suggests that early dietary manipulation of intestinal microbiota may be a novel mechanism to delay T1D onset in genetically pre-disposed individuals.
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Affiliation(s)
- Kyle J Wolf
- Department of Microbiology (KW, RL), University of Alabama at Birmingham, Birmingham, AL, USA
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Lertpiriyapong K, Whary MT, Muthupalani S, Lofgren JL, Gamazon ER, Feng Y, Ge Z, Wang TC, Fox JG. Gastric colonisation with a restricted commensal microbiota replicates the promotion of neoplastic lesions by diverse intestinal microbiota in the Helicobacter pylori INS-GAS mouse model of gastric carcinogenesis. Gut 2014; 63:54-63. [PMID: 23812323 PMCID: PMC4023484 DOI: 10.1136/gutjnl-2013-305178] [Citation(s) in RCA: 198] [Impact Index Per Article: 19.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
OBJECTIVES Gastric colonisation with intestinal flora (IF) has been shown to promote Helicobacter pylori (Hp)-associated gastric cancer. However, it is unknown if the mechanism involves colonisation with specific or diverse microbiota secondary to gastric atrophy. DESIGN Gastric colonisation with Altered Schaedler's flora (ASF) and Hp were correlated with pathology, immune responses and mRNA expression for proinflammatory and cancer-related genes in germ-free (GF), Hp monoassociated (mHp), restricted ASF (rASF; 3 species), and specific pathogen-free (complex IF), hypergastrinemic INS-GAS mice 7 months postinfection. RESULTS Male mice cocolonised with rASFHp or IFHp developed the most severe pathology. IFHp males had the highest inflammatory responses, and 40% developed invasive gastrointestinal intraepithelial neoplasia (GIN). Notably, rASFHp colonisation was highest in males and 23% developed invasive GIN with elevated expression of inflammatory biomarkers. Lesions were less severe in females and none developed GIN. Gastritis in male rASFHp mice was accompanied by decreased Clostridum species ASF356 and Bacteroides species ASF519 colonisation and an overgrowth of Lactobacillus murinus ASF361, supporting that inflammation-driven atrophy alters the gastric niche for GI commensals. Hp colonisation also elevated expression of IL-11 and cancer-related genes, Ptger4 and Tgf-β, further supporting that Hp infection accelerates gastric cancer development in INS-GAS mice. CONCLUSIONS rASFHp colonisation was sufficient for GIN development in males, and lower GIN incidence in females was associated with lower inflammatory responses and gastric commensal and Hp colonisation. Colonisation efficiency of commensals appears more important than microbial diversity and lessens the probability that specific gastrointestinal pathogens are contributing to cancer risk.
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Affiliation(s)
- Kvin Lertpiriyapong
- Division of Comparative Medicine, Massachusetts Institute of Technology, Cambridge, Massachusetts, USA
| | - Mark T. Whary
- Division of Comparative Medicine, Massachusetts Institute of Technology, Cambridge, Massachusetts, USA
| | - Sureshkumar Muthupalani
- Division of Comparative Medicine, Massachusetts Institute of Technology, Cambridge, Massachusetts, USA
| | - Jennifer L. Lofgren
- Division of Comparative Medicine, Massachusetts Institute of Technology, Cambridge, Massachusetts, USA
| | - Eric R. Gamazon
- Section of Genetic Medicine, Department of Medicine, The University of Chicago, Chicago, Illinois, USA
| | - Yan Feng
- Division of Comparative Medicine, Massachusetts Institute of Technology, Cambridge, Massachusetts, USA
| | - Zhongming Ge
- Division of Comparative Medicine, Massachusetts Institute of Technology, Cambridge, Massachusetts, USA
| | - Timothy C. Wang
- Division of Digestive and Liver Diseases, College of Physicians and Surgeons, Columbia University, New York, New York, USA
| | - James G. Fox
- Division of Comparative Medicine, Massachusetts Institute of Technology, Cambridge, Massachusetts, USA
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Abstract
The discovery of Helicobacter pylori overturned the conventional dogma that the stomach was a sterile organ and that pH values<4 were capable of sterilizing the stomach. H. pylori are an etiological agent associated with gastritis, hypochlorhydria, duodenal ulcers, and gastric cancer. It is now appreciated that the human stomach supports a bacterial community with possibly 100s of bacterial species that influence stomach homeostasis. Other bacteria colonizing the stomach may also influence H. pylori-associated gastric pathogenesis by creating reactive oxygen and nitrogen species and modulating inflammatory responses. In this review, we summarize the available literature concerning the gastric microbiota in humans, mice, and Mongolian gerbils. We also discuss the gastric perturbations, many involving H. pylori, that facilitate the colonization by bacteria from other compartments of the gastrointestinal tract, and identify risk factors known to affect gastric homeostasis that contribute to changes in the microbiota.
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13
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Yang I, Nell S, Suerbaum S. Survival in hostile territory: the microbiota of the stomach. FEMS Microbiol Rev 2013; 37:736-61. [DOI: 10.1111/1574-6976.12027] [Citation(s) in RCA: 108] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2013] [Revised: 05/28/2013] [Accepted: 06/07/2013] [Indexed: 02/06/2023] Open
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14
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Abstract
Significant advances have been made over the last 12 months in the understanding of the biology of non-H. pylori Helicobacter species (NHPH). Several studies have investigated the association between NHPH and human disease, including Crohn's disease, lithiasis, liver disease, coronary disease, gastritis, and pyoderma gangrenosum-like ulcers. Novel Helicobacter taxa were identified in new vertebrate hosts, and new methodologies in the fields of identification of Helicobacter spp. and evaluation of antibiotic resistance were described. The genome of the first human-derived gastric NHPH strain (Helicobacter bizzozeronii CIII-1) was sequenced, and several studies elucidated functions of different genes in NHPH. A number of important investigations regarding pathogenesis and immunopathobiology of NHPH infections have been published including the description of a new urease in Helicobacter mustelae. Finally, the effects of the gut microbiota and probiotics on NHPH infections were investigated.
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Affiliation(s)
- Mirko Rossi
- Department of Food Hygiene and Environmental Health, Faculty of Veterinary Medicine, University of Helsinki, Helsinki, Finland
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15
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Abstract
The current obesity epidemic clearly has many causes, including the impact of our modern world on both our diet and our lifestyle/physical activity. Although many interventions have been recommended, the prevalence of obesity continues to rise and has forced a re-evaluation of the potential interventions that could have an impact. In recent years it has been definitively shown that microbiota in the gastrointestinal tract are altered in obese individuals. Recent data provide a potential mechanistic understanding of the interactions between microbiota and obesity and allow potential new interventions to the control of obesity to be proposed.
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Affiliation(s)
- Kyle J. Wolf
- Department of Microbiology at the University of Alabama at Birmingham
| | - Robin G. Lorenz
- Department of Microbiology at the University of Alabama at Birmingham
- Department of Pathology at the University of Alabama at Birmingham
- Corresponding author: Robin G. Lorenz, Department of Pathology, University of Alabama at Birmingham, 1825 University Boulevard, SHEL 602, Birmingham, AL 35294-2182, USA.
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