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Elghannam MT, Hassanien MH, Ameen YA, Turky EA, ELattar GM, ELRay AA, ELTalkawy MD. Helicobacter pylori and oral-gut microbiome: clinical implications. Infection 2024; 52:289-300. [PMID: 37917397 PMCID: PMC10954935 DOI: 10.1007/s15010-023-02115-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2023] [Accepted: 10/09/2023] [Indexed: 11/04/2023]
Abstract
More than half of the world's population are colonized with H. pylori; however, the prevalence varies geographically with the highest incidence in Africa. H. pylori is probably a commensal organism that has been associated with the development of gastritis, ulcers, and gastric cancer. H. pylori alone is most probably not enough for the development of gastric carcinoma, but evidence for its association with the disease is high and has, therefore, been classified by the International Agency for Research on Cancer as a Class 1 carcinogen. Bacteroidetes and Fusobacteria positively coexisted during H. pylori infection along the oral-gut axis. The eradication therapy required to treat H. pylori infection can also have detrimental consequences for the gut microbiota, leading to a decreased alpha diversity. Therefore, therapy regimens integrated with probiotics may abolish the negative effects of antibiotic therapy on the gut microbiota. These eradication therapies combined with probiotics have also higher rates of eradication, when compared to standard treatments, and are associated with reduced side effects, improving the patient's compliance. The eradication therapy not only affects gut microbiome but also affects the oral microbiome with robust predominance of harmful bacteria. However, there have been reports of a protective role of H. pylori in Barrett's esophagus, esophageal adenocarcinoma, eosinophilic esophagitis, IBD, asthma, and even multiple sclerosis. Therefore, eradication therapy should be carefully considered, and test to treat policy should be tailored to specific communities especially in highly endemic areas. Supplementation of probiotics, prebiotics, herbals, and microbial metabolites to reduce the negative effects of eradication therapy should be considered. After failure of many eradication attempts, the benefits of H. pylori eradication should be carefully balanced against the risk of adverse effects especially in the elderly, persons with frailty, and intolerance to antibiotics.
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Affiliation(s)
- Maged T Elghannam
- Hepatogastroenterology Department, Theodor Bilharz Research Institute, Giza, Egypt.
| | - Moataz H Hassanien
- Hepatogastroenterology Department, Theodor Bilharz Research Institute, Giza, Egypt
| | - Yosry A Ameen
- Hepatogastroenterology Department, Theodor Bilharz Research Institute, Giza, Egypt
| | - Emad A Turky
- Hepatogastroenterology Department, Theodor Bilharz Research Institute, Giza, Egypt
| | - Gamal M ELattar
- Hepatogastroenterology Department, Theodor Bilharz Research Institute, Giza, Egypt
| | - Ahmed A ELRay
- Hepatogastroenterology Department, Theodor Bilharz Research Institute, Giza, Egypt
| | - Mohammed D ELTalkawy
- Hepatogastroenterology Department, Theodor Bilharz Research Institute, Giza, Egypt
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Engelsberger V, Gerhard M, Mejías-Luque R. Effects of Helicobacter pylori infection on intestinal microbiota, immunity and colorectal cancer risk. Front Cell Infect Microbiol 2024; 14:1339750. [PMID: 38343887 PMCID: PMC10853882 DOI: 10.3389/fcimb.2024.1339750] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2023] [Accepted: 01/10/2024] [Indexed: 02/15/2024] Open
Abstract
Infecting about half of the world´s population, Helicobacter pylori is one of the most prevalent bacterial infections worldwide and the strongest known risk factor for gastric cancer. Although H. pylori colonizes exclusively the gastric epithelium, the infection has also been associated with various extragastric diseases, including colorectal cancer (CRC). Epidemiological studies reported an almost two-fold increased risk for infected individuals to develop CRC, but only recently, direct causal and functional links between the chronic infection and CRC have been revealed. Besides modulating the host intestinal immune response, H. pylori is thought to increase CRC risk by inducing gut microbiota alterations. It is known that H. pylori infection not only impacts the gastric microbiota at the site of infection but also leads to changes in bacterial colonization in the distal large intestine. Considering that the gut microbiome plays a driving role in CRC, H. pylori infection emerges as a key factor responsible for promoting changes in microbiome signatures that could contribute to tumor development. Within this review, we want to focus on the interplay between H. pylori infection, changes in the intestinal microbiota, and intestinal immunity. In addition, the effects of H. pylori antibiotic eradication therapy will be discussed.
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Affiliation(s)
| | | | - Raquel Mejías-Luque
- Institute for Medical Microbiology, Immunology and Hygiene, TUM School of Medicine and Health, Department Preclinical Medicine, Technical University of Munich, Munich, Germany
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3
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Lei Y, Liu X, Liu J, Zhang M, Zhou Y, Yan W, Tian D, Zhang P, Han P. Inverse Association Between Helicobacter pylori Infection and Unexplained Isolated Terminal Ileitis: A Retrospective Study. J Inflamm Res 2021; 14:3015-3021. [PMID: 34262325 PMCID: PMC8274830 DOI: 10.2147/jir.s319561] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2021] [Accepted: 07/01/2021] [Indexed: 11/23/2022] Open
Abstract
Background Isolated terminal ileitis (ITI) is a phenomenon often observed during colonoscopy, but in most cases, the specific etiology of ITI is unclear. Helicobacter pylori (H. pylori) infection has been reported to be associated with a wide variety of diseases, especially gastrointestinal diseases. Here, we conducted a retrospective study to explore a potential correlation between H. pylori infection and unexplained ITI (UITI). Materials and Methods The retrospective study was conducted at Sino-French New City Branch of Tongji Hospital, Wuhan, China, from April 2017 to October 2020. All subjects underwent total colonoscopy, with the endoscope being inserted more than 10cm into the terminal ileum. Subjects also received a 13C-urea breath test (13C-UBT). Data on the age, gender, endoscopic manifestations, and main clinical symptoms of subjects were collected. The presence of H. pylori infection was defined as a positive 13C-UBT result. Logistic regression models were used to analyze the potential correlation between H. pylori infection and UITI. Results There were 247 subjects (25.1%) in the H. pylori (+) group and 739 subjects (74.9%) in the H. pylori (-) group. The prevalence of UITI in the H. pylori (+) group was significantly lower than that in the H. pylori (-) group (OR = 0.518; 95% CI 0.281-0.956; P = 0.035), and there was no difference in other clinical features between groups. Stratification analysis results showed that there was an inverse association between H. pylori infection and UITI in subjects with age <60 (P = 0.046). Conclusion These data showed that H. pylori infection was negatively correlated with UITI. Additional studies are needed to validate these findings in a larger cohort as well as to explore the underlying mechanisms.
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Affiliation(s)
- Yu Lei
- Department of Gastroenterology, Tongji Hospital of Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, Hubei Province, People's Republic of China
| | - Xiaoyu Liu
- Department of Gastroenterology, Tongji Hospital of Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, Hubei Province, People's Republic of China
| | - Jingmei Liu
- Department of Gastroenterology, Tongji Hospital of Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, Hubei Province, People's Republic of China
| | - Min Zhang
- Department of Gastroenterology, Tongji Hospital of Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, Hubei Province, People's Republic of China
| | - Yan Zhou
- Department of Gastroenterology, Tongji Hospital of Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, Hubei Province, People's Republic of China
| | - Wei Yan
- Department of Gastroenterology, Tongji Hospital of Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, Hubei Province, People's Republic of China
| | - Dean Tian
- Department of Gastroenterology, Tongji Hospital of Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, Hubei Province, People's Republic of China
| | - Ping Zhang
- Department of Gastroenterology, Tongji Hospital of Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, Hubei Province, People's Republic of China
| | - Ping Han
- Department of Gastroenterology, Tongji Hospital of Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, Hubei Province, People's Republic of China
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Reshetnyak VI, Burmistrov AI, Maev IV. Helicobacter pylori: Commensal, symbiont or pathogen? World J Gastroenterol 2021; 27:545-560. [PMID: 33642828 PMCID: PMC7901052 DOI: 10.3748/wjg.v27.i7.545] [Citation(s) in RCA: 34] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/05/2020] [Revised: 12/28/2020] [Accepted: 01/21/2021] [Indexed: 02/06/2023] Open
Abstract
This review considers the data on Helicobacter pylori (H. pylori), which have been accumulated over 40 years since its description as an etiological factor in gastrointestinal diseases. The majority of modern publications are devoted to the study of the pathogenic properties of the microorganism in the development of chronic gastritis, peptic ulcer disease, and gastric cancer, as well as methods for its eradication. However, in recent years, there have been more and more studies which have suggested that H. pylori has a beneficial, or potentially positive, effect on the human body. The authors have attempted to objectively analyze the information accumulated in the literature on H. pylori. Some studies consider it as one of the recently identified human bacterial pathogens, and special attention is paid to the evidence suggesting that it is probably part of the composition of the human microbiome as a commensal (commensal from French to English is a table companion) or even a symbiont. The presented data discussing the presence or absence of the effect of H. pylori on human health suggest that there is an apparent ambiguity of the problem. The re-assessment of the data available on H. pylori infection is important in order to answer the question of whether it is necessary to create a program of mass H. pylori eradication or to apply a more personalized approach to treating patients with H. pylori-associated gastrointestinal diseases and to perform eradication therapy.
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Affiliation(s)
- Vasiliy Ivanovich Reshetnyak
- Department of Propaedeutic of Internal Diseases and Gastroenterology, A.I. Yevdokimov Moscow State University of Medicine and Dentistry, Moscow 127473, Russia
| | - Alexandr Igorevich Burmistrov
- Department of Propaedeutic of Internal Diseases and Gastroenterology, A.I. Yevdokimov Moscow State University of Medicine and Dentistry, Moscow 127473, Russia
| | - Igor Veniaminovich Maev
- Department of Propaedeutic of Internal Diseases and Gastroenterology, A.I. Yevdokimov Moscow State University of Medicine and Dentistry, Moscow 127473, Russia
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Varga MG, Wood CR, Butt J, Ryan ME, You WC, Pan K, Waterboer T, Epplein M, Shaffer CL. Immunostimulatory membrane proteins potentiate H. pylori-induced carcinogenesis by enabling CagA translocation. Gut Microbes 2021; 13:1-13. [PMID: 33382363 PMCID: PMC7781638 DOI: 10.1080/19490976.2020.1862613] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/24/2020] [Revised: 11/04/2020] [Accepted: 11/26/2020] [Indexed: 02/07/2023] Open
Abstract
Infection with Helicobacter pylori is the single greatest risk factor for developing gastric adenocarcinoma. In prospective, population-based studies, seropositivity to the uncharacterized H. pylori proteins Hp0305 and Hp1564 was significantly associated with cancer risk in East Asia. However, the mechanism underlying this observation has not been elucidated. Here, we show that Hp0305 and Hp1564 act in concert with previously ascribed H. pylori virulence mechanisms to orchestrate cellular alterations that promote gastric carcinogenesis. In samples from 546 patients exhibiting premalignant gastric lesions, seropositivity to Hp0305 and Hp1564 was significantly associated with increased gastric atrophy across all stomach conditions. In vitro, depletion of Hp0305 and Hp1564 significantly reduced levels of gastric cell-associated bacteria and markedly impaired the ability of H. pylori to stimulate pro-inflammatory cytokine production. Remarkably, our studies revealed that Hp1564 is required for translocation of the oncoprotein CagA into gastric epithelial cells. Our data provide experimental insight into the molecular mechanisms governing novel H. pylori pathogenicity factors that are strongly associated with gastric disease and highlight the potential of Hp0305 and Hp1564 as robust molecular tools that can improve identification of individuals that are highly susceptible to gastric cancer. We demonstrate that Hp0305 and Hp1564 augment H. pylori-mediated inflammation and gastric cancer risk by promoting key bacteria-gastric cell interactions that facilitate delivery of oncogenic microbial cargo to target cells. Thus, therapeutically targeting microbial interactions driven by Hp0305/Hp1564 may enable focused H. pylori eradication strategies to prevent development of gastric malignancies in high-risk populations.
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Affiliation(s)
- Matthew G. Varga
- Department of Epidemiology, Lineberger Comprehensive Cancer Center and Gillings School of Global Public Health, University of North Carolina, Chapel Hill, NC, USA
| | - Cecily R. Wood
- Department of Veterinary Science, University of Kentucky, Lexington, KY, USA
| | - Julia Butt
- Infections and Cancer Epidemiology, German Cancer Research Center, Heidelberg, Germany
| | - Mackenzie E. Ryan
- Department of Microbiology, Immunology, and Molecular Genetics, University of Kentucky, Lexington, KY, USA
| | - Wei-Cheng You
- Department of Cancer Epidemiology, Peking University Cancer Hospital and Institute, Beijing, China
| | - Kaifeng Pan
- Department of Cancer Epidemiology, Peking University Cancer Hospital and Institute, Beijing, China
| | - Tim Waterboer
- Infections and Cancer Epidemiology, German Cancer Research Center, Heidelberg, Germany
| | - Meira Epplein
- Department of Population Health Sciences and Duke Cancer Institute, Cancer Control and Population Sciences Program, Duke University, Durham, NC, USA
| | - Carrie L. Shaffer
- Department of Veterinary Science, University of Kentucky, Lexington, KY, USA
- Department of Microbiology, Immunology, and Molecular Genetics, University of Kentucky, Lexington, KY, USA
- Department of Pharmaceutical Sciences, University of Kentucky, Lexington, KY, USA
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6
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Owyang SY, Zhang M, El-Zaatari M, Eaton KA, Bishu S, Hou G, Grasberger H, Kao JY. Dendritic cell-derived TGF-β mediates the induction of mucosal regulatory T-cell response to Helicobacter infection essential for maintenance of immune tolerance in mice. Helicobacter 2020; 25:e12763. [PMID: 33025641 PMCID: PMC7885176 DOI: 10.1111/hel.12763] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/21/2020] [Revised: 09/04/2020] [Accepted: 09/15/2020] [Indexed: 02/06/2023]
Abstract
BACKGROUND Helicobacter pylori infection leads to regulatory T-cell (Treg) induction in infected mice, which contributes to H. pylori immune escape. However, the mechanisms responsible for H. pylori induction of Treg and immune tolerance remain unclear. We hypothesized DC-produced TGF-β may be responsible for Treg induction and immune tolerance. MATERIALS AND METHODS To test this hypothesis, we generated TGF-β∆DC mice (CD11c+ DC-specific TGF-β deletion) and assessed the impact of DC-specific TGF-β deletion on DC function during Helicobacter infection in vitro and in vivo. To examine the T cell-independent DC function, we crossed TGF-β∆DC mice onto Rag1KO background to generate TGF-β∆DC xRag1KO mice. RESULTS When stimulated with H. pylori, TGF-β∆DC BMDC/splenocyte cocultures showed increased levels of proinflammatory cytokines and decreased levels of anti-inflammatory cytokines compared to control, indicating a proinflammatory DC phenotype. Following 6 months of H. felis infection, TGF-β∆DC mice developed more severe gastritis and a trend toward more metaplasia compared to TGF-βfl/fl with increased levels of inflammatory Th1 cytokine mRNA and lower gastric H. felis colonization compared to infected TGF-βfl/fl mice. In a T cell-deficient background using TGF-β∆DC xRag1KO mice, H. felis colonization was significantly lower when DC-derived TGF-β was absent, revealing a direct, innate function of DC in controlling H. felis infection independent of Treg induction. CONCLUSIONS Our findings indicate that DC-derived TGF-β mediates Helicobacter-induced Treg response and attenuates the inflammatory Th1 response. We also demonstrated a previously unrecognized innate role of DC controlling Helicobacter colonization via a Treg-independent mechanism. DC TGF-β signaling may represent an important target in the management of H. pylori.
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Affiliation(s)
- Stephanie Y. Owyang
- Department of Internal Medicine (Division of Gastroenterology), University of Michigan Health System, Ann Arbor, Michigan, 48109 USA
| | - Min Zhang
- Department of Internal Medicine (Division of Gastroenterology), University of Michigan Health System, Ann Arbor, Michigan, 48109 USA
| | - Mohamad El-Zaatari
- Department of Internal Medicine (Division of Gastroenterology), University of Michigan Health System, Ann Arbor, Michigan, 48109 USA
| | - Kathryn A. Eaton
- Unit for Laboratory Animal Medicine and Department of Microbiology and Immunology, University of Michigan, Ann Arbor, Michigan, 48109 USA
| | - Shrinivas Bishu
- Department of Internal Medicine (Division of Gastroenterology), University of Michigan Health System, Ann Arbor, Michigan, 48109 USA
| | - Guoqing Hou
- Department of Internal Medicine (Division of Gastroenterology), University of Michigan Health System, Ann Arbor, Michigan, 48109 USA
| | - Helmut Grasberger
- Department of Internal Medicine (Division of Gastroenterology), University of Michigan Health System, Ann Arbor, Michigan, 48109 USA
| | - John Y. Kao
- Department of Internal Medicine (Division of Gastroenterology), University of Michigan Health System, Ann Arbor, Michigan, 48109 USA
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Zuo ZT, Ma Y, Sun Y, Bai CQ, Ling CH, Yuan FL. The Protective Effects of Helicobacter pylori Infection on Allergic Asthma. Int Arch Allergy Immunol 2020; 182:53-64. [PMID: 33080611 DOI: 10.1159/000508330] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2020] [Accepted: 04/30/2020] [Indexed: 12/13/2022] Open
Abstract
As an ancient Gram-negative bacterium, Helicobacter pylori has settled in human stomach. Eradicating H. pylori increases the morbidities of asthma and other allergic diseases. Therefore, H. pylori might play a protective role against asthma. The "disappearing microbiota" hypothesis suggests that the absence of certain types of the ancestral microbiota could change the development of immunology, metabolism, and cognitive ability in our early life, contributing to the development of some diseases. And the Hygiene Hypothesis links early environmental and microbial exposure to the prevalence of atopic allergies and asthma. Exposure to the environment and microbes can influence the growing immune system and protect subsequent immune-mediated diseases. H. pylori can inhibit allergic asthma by regulating the ratio of helper T cells 1/2 (Th1/Th2), Th17/regulatory T cells (Tregs), etc. H. pylori can also target dendritic cells to promote immune tolerance and enhance the protective effect on allergic asthma, and this effect relies on highly suppressed Tregs. The remote regulation of lung immune function by H. pylori is consistent with the gut-lung axis theory. Perhaps, H. pylori also protects against asthma by altering levels of stomach hormones, affecting the autonomic nervous system and lowering the expression of heat shock protein 70. Therapeutic products from H. pylori may be used to prevent and treat asthma. This paper reviews the possible protective influence of H. pylori on allergic asthma and the possible application of H. pylori in treating asthma.
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Affiliation(s)
- Zhi Tong Zuo
- Department of Respiratory Disease, The Hospital Affiliated to Jiangnan University, Wuxi, China,
| | - Ya Ma
- Wuxi Medical College of Jiangnan University, Wuxi, China
| | - Yan Sun
- Department of Respiratory Disease, The Hospital Affiliated to Jiangnan University, Wuxi, China
| | - Cui Qing Bai
- Department of Respiratory Disease, The Hospital Affiliated to Jiangnan University, Wuxi, China
| | - Chun Hua Ling
- Department of Respiratory Disease, First Affiliated Hospital of Soochow University, Suzhou, China
| | - Feng Lai Yuan
- Department of Orthopaedics and Central Laboratory, The Hospital Affiliated to Jiangnan University, Wuxi, China
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8
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Alpízar-Alpízar W, Skindersoe ME, Rasmussen L, Kriegbaum MC, Christensen IJ, Lund IK, Illemann M, Laerum OD, Krogfelt KA, Andersen LP, Ploug M. Helicobacter pylori Colonization Drives Urokinase Receptor (uPAR) Expression in Murine Gastric Epithelium During Early Pathogenesis. Microorganisms 2020; 8:microorganisms8071019. [PMID: 32660136 PMCID: PMC7409347 DOI: 10.3390/microorganisms8071019] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2020] [Revised: 07/04/2020] [Accepted: 07/07/2020] [Indexed: 12/16/2022] Open
Abstract
(1) Background: Persistent Helicobacter pylori infection is the most important risk factor for gastric cancer. The urokinase receptor (uPAR) is upregulated in lesions harboring cancer invasion and inflammation. Circumstantial evidence tends to correlate H. pylori colonization with increased uPAR expression in the human gastric epithelium, but a direct causative link has not yet been established in vivo; (2) Methods: In a mouse model of H. pylori-induced gastritis, we investigated the temporal emergence of uPAR protein expression in the gastric mucosa in response to H. pylori (SS1 strain) infection; (3) Results: We observed intense uPAR immunoreactivity in foveolar epithelial cells of the gastric corpus due to de novo synthesis, compared to non-infected animals. This uPAR induction represents a very early response, but it increases progressively over time as do infiltrating immune cells. Eradication of H. pylori infection by antimicrobial therapy causes a regression of uPAR expression to its physiological baseline levels. Suppression of the inflammatory response by prostaglandin E2 treatment attenuates uPAR expression. Notwithstanding this relationship, H. pylori does induce uPAR expression in vitro in co-cultures with gastric cancer cell lines; (4) Conclusions: We showed that persistent H. pylori colonization is a necessary event for the emergence of a relatively high uPAR protein expression in murine gastric epithelial cells.
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Affiliation(s)
- Warner Alpízar-Alpízar
- The Finsen Laboratory, Rigshospitalet, 2100 Copenhagen, Denmark; (M.C.K.); (I.J.C); (I.K.L.); (M.I.); (O.D.L.)
- Biotech Research and Innovation Centre (BRIC), University of Copenhagen, 2100 Copenhagen, Denmark
- Centre for Research on Microscopic Structures (CIEMic) and Department of Biochemistry, University of Costa Rica, 2060 San José, Costa Rica
- Correspondence: (W.A.-A.); (M.P.)
| | - Mette E. Skindersoe
- Department of Bacteria, Parasites and Fungi, Statens Serum Institute, 2300 Copenhagen, Denmark; (M.E.S.); (K.A.K.)
- Bacthera, Kogle Allé 6, 2970 Hoersholm, Denmark
| | - Lone Rasmussen
- Department of Clinical Microbiology, Rigshospitalet, 2100 Copenhagen, Denmark; (L.P.A.); (L.R.)
| | - Mette C. Kriegbaum
- The Finsen Laboratory, Rigshospitalet, 2100 Copenhagen, Denmark; (M.C.K.); (I.J.C); (I.K.L.); (M.I.); (O.D.L.)
- Biotech Research and Innovation Centre (BRIC), University of Copenhagen, 2100 Copenhagen, Denmark
| | - Ib J. Christensen
- The Finsen Laboratory, Rigshospitalet, 2100 Copenhagen, Denmark; (M.C.K.); (I.J.C); (I.K.L.); (M.I.); (O.D.L.)
- Biotech Research and Innovation Centre (BRIC), University of Copenhagen, 2100 Copenhagen, Denmark
- Hvidovre Hospital, University of Copenhagen, 2650 Copenhagen, Denmark
| | - Ida K. Lund
- The Finsen Laboratory, Rigshospitalet, 2100 Copenhagen, Denmark; (M.C.K.); (I.J.C); (I.K.L.); (M.I.); (O.D.L.)
- Biotech Research and Innovation Centre (BRIC), University of Copenhagen, 2100 Copenhagen, Denmark
| | - Martin Illemann
- The Finsen Laboratory, Rigshospitalet, 2100 Copenhagen, Denmark; (M.C.K.); (I.J.C); (I.K.L.); (M.I.); (O.D.L.)
- Biotech Research and Innovation Centre (BRIC), University of Copenhagen, 2100 Copenhagen, Denmark
| | - Ole D. Laerum
- The Finsen Laboratory, Rigshospitalet, 2100 Copenhagen, Denmark; (M.C.K.); (I.J.C); (I.K.L.); (M.I.); (O.D.L.)
- Biotech Research and Innovation Centre (BRIC), University of Copenhagen, 2100 Copenhagen, Denmark
| | - Karen A. Krogfelt
- Department of Bacteria, Parasites and Fungi, Statens Serum Institute, 2300 Copenhagen, Denmark; (M.E.S.); (K.A.K.)
- Department of Science and Environment, Roskilde University, 4000 Roskilde, Denmark
- Department of Virus and microbiological Diagnostics, Statens Serum Institute, 2300 Copenhagen, Denmark
| | - Leif P. Andersen
- Department of Clinical Microbiology, Rigshospitalet, 2100 Copenhagen, Denmark; (L.P.A.); (L.R.)
| | - Michael Ploug
- The Finsen Laboratory, Rigshospitalet, 2100 Copenhagen, Denmark; (M.C.K.); (I.J.C); (I.K.L.); (M.I.); (O.D.L.)
- Biotech Research and Innovation Centre (BRIC), University of Copenhagen, 2100 Copenhagen, Denmark
- Correspondence: (W.A.-A.); (M.P.)
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9
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Shimamoto T, Yamamichi N, Gondo K, Takahashi Y, Takeuchi C, Wada R, Mitsushima T, Koike K. The association of Helicobacter pylori infection with serum lipid profiles: An evaluation based on a combination of meta-analysis and a propensity score-based observational approach. PLoS One 2020; 15:e0234433. [PMID: 32511269 PMCID: PMC7279579 DOI: 10.1371/journal.pone.0234433] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2020] [Accepted: 05/25/2020] [Indexed: 12/14/2022] Open
Abstract
Background Several previous studies have suggested that Helicobacter pylori (H. pylori) infection affects the serum lipid profile. However, it remains controversial and the mechanism has not been elucidated. The purpose of this study is to use an epidemiological perspective to evaluate the association between H. pylori infection and the serum lipid profile. Methods Multivariate analysis was performed using the data of serum lipid profile, infection status of H. pylori, fitness/lifestyle habits, and various subjects’ characteristics which were derived from the 15,679 generally healthy individuals in Japan. The average treatment effects (ATEs) of H. pylori infection on the serum lipid profile were estimated using augmented inverse probability weighting (AIPW). A meta-analysis was also performed using the 27 studies worldwide in which the status of H. pylori infection and at least one serum examination value (high-density lipoprotein cholesterol (HDL-C), low-density lipoprotein cholesterol (LDL-C), total cholesterol (TC), or triglyceride (TG)) were described. Results The ATEs determined with AIPW showed that H. pylori infection has significant positive effects on LDL-C and TC (ATE (95% confidence interval [95%CI]) = 3.4 (2.36–4.49) and 1.7 (0.58–2.88), respectively) but has significant negative effects on HDL-C and TG (ATE (95%CI) = −1.2 (−1.74 to −0.72) and −3.5 (−5.92 to −1.06), respectively). The meta-analysis to estimate the association between H. pylori infection and the serum lipid profile revealed that H. pylori infection is positively associated with LDL-C, TC, and TG (standardized mean difference [SMD] (95%CI) = 0.11 (0.09–0.12), 0.09 (0.07–0.10) and 0.06 (0.05–0.08), respectively) and negatively associated with HDL-C (SMD = −0.13 (−0.14 to −0.12)). Conclusion Both our multivariate analyses and meta-analysis showed that H. pylori infection significantly affects the serum lipid profile, which might lead to various dyslipidemia-induced severe diseases like coronary thrombosis or cerebral infarction.
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Affiliation(s)
- Takeshi Shimamoto
- Department of Medical Statistics and Information, Kameda Medical Center Makuhari, Mihama-ku, Chiba, Japan
- Department of Gastroenterology, Graduate School of Medicine, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo, Japan
| | - Nobutake Yamamichi
- Department of Gastroenterology, Graduate School of Medicine, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo, Japan
- * E-mail:
| | - Kenta Gondo
- Department of Gastroenterology, Graduate School of Medicine, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo, Japan
| | - Yu Takahashi
- Department of Gastroenterology, Graduate School of Medicine, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo, Japan
| | - Chihiro Takeuchi
- Department of Gastroenterology, Graduate School of Medicine, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo, Japan
| | - Ryoichi Wada
- Department of Medical Statistics and Information, Kameda Medical Center Makuhari, Mihama-ku, Chiba, Japan
| | - Toru Mitsushima
- Department of Medical Statistics and Information, Kameda Medical Center Makuhari, Mihama-ku, Chiba, Japan
| | - Kazuhiko Koike
- Department of Gastroenterology, Graduate School of Medicine, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo, Japan
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10
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Yin JJ, Duan FJ, Madhurapantula SV, Zhang YH, He G, Wang KY, Ji XK, Wang KJ. Helicobacter pylori and gastric cardia cancer: What do we know about their relationship? World J Meta-Anal 2020; 8:89-97. [DOI: 10.13105/wjma.v8.i2.89] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/27/2019] [Revised: 02/08/2020] [Accepted: 03/19/2020] [Indexed: 02/06/2023] Open
Abstract
The incidence of gastric cardia cancer is increasing around the world. Since the discovery of Helicobacter pylori (H. pylori), numerous studies have proved that it is a causative factor for many kinds of digestive system tumors. Although the literature on gastric cardia cancer and H. pylori is not scarce, there are still many controversies on the relationship between gastric cardia cancer and H. pylori. Many Western research results showed that there was a negative or no correlation between H. pylori infection and gastric cardia cancer, but in several studies in Asian countries, such as China, H. pylori was demonstrated to be a risk factor for gastric cardia cancer. Therefore, we intended to analyze the related studies to find out the relationship between H. pylori and gastric cardia cancer and find out the causes of the above controversies. We also conducted a meta-analysis of the relationship between cagA positive expression of H. pylori and gastric cardia cancer, to find out whether there is an effect between those two. The primary purpose of this paper was to explore the relationship between gastric cardia cancer and H. pylori. Through analysis, the study showed the reasons for the controversies mentioned above: (1) Geographical factors could affect the relationship between H. pylori and gastric cardia cancer; (2) The definition of gastric cardia cancer in various studies is inconsistent. The result of a meta-analysis about the relationship between H. pylori virulence factor cagA and gastric cardia cancer showed that there was no relationship between these two.
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Affiliation(s)
- Jing-Jing Yin
- Department of Epidemiology and Health Statistics, College of Public Health, Zhengzhou University, Zhengzhou 450001, Henan Province, China
- Key Laboratory of Tumor Epidemiology of Henan Province, Zhengzhou 450052, Henan Province, China
| | - Fu-Jiao Duan
- Department of Epidemiology and Health Statistics, College of Public Health, Zhengzhou University, Zhengzhou 450001, Henan Province, China
- Key Laboratory of Tumor Epidemiology of Henan Province, Zhengzhou 450052, Henan Province, China
| | - Sailaja Vatsalya Madhurapantula
- Department of Epidemiology and Health Statistics, College of Public Health, Zhengzhou University, Zhengzhou 450001, Henan Province, China
- Key Laboratory of Tumor Epidemiology of Henan Province, Zhengzhou 450052, Henan Province, China
| | - Yue-Hua Zhang
- Department of Epidemiology and Health Statistics, College of Public Health, Zhengzhou University, Zhengzhou 450001, Henan Province, China
- Key Laboratory of Tumor Epidemiology of Henan Province, Zhengzhou 450052, Henan Province, China
| | - Gui He
- Department of Epidemiology and Health Statistics, College of Public Health, Zhengzhou University, Zhengzhou 450001, Henan Province, China
- Key Laboratory of Tumor Epidemiology of Henan Province, Zhengzhou 450052, Henan Province, China
| | - Kun-Yan Wang
- Department of Epidemiology and Health Statistics, College of Public Health, Zhengzhou University, Zhengzhou 450001, Henan Province, China
- Key Laboratory of Tumor Epidemiology of Henan Province, Zhengzhou 450052, Henan Province, China
| | - Xuan-Ke Ji
- Department of Epidemiology and Health Statistics, College of Public Health, Zhengzhou University, Zhengzhou 450001, Henan Province, China
- Key Laboratory of Tumor Epidemiology of Henan Province, Zhengzhou 450052, Henan Province, China
| | - Kai-Juan Wang
- Department of Epidemiology and Health Statistics, College of Public Health, Zhengzhou University, Zhengzhou 450001, Henan Province, China
- Key Laboratory of Tumor Epidemiology of Henan Province, Zhengzhou 450052, Henan Province, China
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11
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Lei X, Wang Y. Predicting Microbe-Disease Association by Learning Graph Representations and Rule-Based Inference on the Heterogeneous Network. Front Microbiol 2020; 11:579. [PMID: 32351464 PMCID: PMC7174569 DOI: 10.3389/fmicb.2020.00579] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2019] [Accepted: 03/17/2020] [Indexed: 12/18/2022] Open
Abstract
More and more clinical observations have implied that microbes have great effects on human diseases. Understanding the relations between microbes and diseases are of profound significance for disease prevention and therapy. In this paper, we propose a predictive model based on the known microbe-disease associations to discover potential microbe-disease associations through integrating Learning Graph Representations and a modified Scoring mechanism on the Heterogeneous network (called LGRSH). Firstly, the similarity networks for microbe and disease are obtained based on the similarity of Gaussian interaction profile kernel. Then, we construct a heterogeneous network including these two similarity networks and microbe-disease associations' network. After that, the embedding algorithm Node2vec is implemented to learn representations of nodes in the heterogeneous network. Finally, according to these low-dimensional vector representations, we calculate the relevance between each microbe and disease by utilizing a modified rule-based inference method. By comparison with three other methods including LRLSHMDA, KATZHMDA and BiRWHMDA, LGRSH performs better than others. Moreover, in case studies of asthma, Chronic Obstructive Pulmonary Disease and Inflammatory Bowel Disease, there are 8, 8, and 10 out of the top-10 discovered disease-related microbes were validated respectively, demonstrating that LGRSH performs well in predicting potential microbe-disease associations.
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Affiliation(s)
- Xiujuan Lei
- School of Computer Science, Shaanxi Normal University, Xi'an, China
| | - Yueyue Wang
- School of Computer Science, Shaanxi Normal University, Xi'an, China
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12
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Yu X, Wang Z, Wang L, Meng X, Zhou C, Xin Y, Sun W, Dong Q. Gastric hyperplastic polyps inversely associated with current Helicobacter pylori infection. Exp Ther Med 2020; 19:3143-3149. [PMID: 32256802 DOI: 10.3892/etm.2020.8567] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2019] [Accepted: 01/30/2020] [Indexed: 12/26/2022] Open
Abstract
The incidence of gastric hyperplastic polyps (HPs) has been on the rise in recent years. The contribution of Helicobacter pylori infection to this trend has remained to be elucidated. The present study aimed to explore the association between HPs and H. pylori in China, an area with a high infection rate of H. pylori. In order to study trends of HPs and H. pylori infection over the past decades, cases encountered from 2009 to 2018 were assessed and a total of 109,150 consecutive patients who underwent esophagogastroduodenoscopy at Qingdao Municipal Hospital (Qingdao, China) were enrolled. The incidence of HPs and the prevalence of H. pylori were determined and their correlation was explored. Gastric HPs were detected in 1,497 patients (1.6%) who received gastric biopsies. The incidence of HPs exhibited a rising trend, with a ~4-fold increase in the annual detection rate from 2009 to 2018. The prevalence of H. pylori infection was inversely associated with the prevalence of HPs (adjusted odds ratio, 0.66). The prevalence of H. pylori in the examined cohort decreased with time (r=-0.76, P=0.011). The decreasing trend of H. pylori infection was negatively correlated with the rising trend of HPs (r=-0.64, P=0.048), further indicating an inverse association between them. The difference in the prevalence of HPs between H. pylori-negative and -positive patients increased with age (r=0.80, P=0.018). The age-associated increase was slower in H. pylori-infected patients. The decline in H. pylori infection with time appeared to not be associated with the birth cohort effect, suggesting the decline was not caused by exposure to environmental factors during an early period of life. The present results indicated that the incidence of gastric HPs increased with the decline in H. pylori infection, demonstrating an inverse association between the occurrence of HPs and the infection.
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Affiliation(s)
- XinJuan Yu
- Central Laboratories, Qingdao Municipal Hospital, Qingdao University, Qingdao, Shandong 266000, P.R. China
| | - ZhengQiang Wang
- Clinical Laboratory, Qingdao Municipal Hospital, Qingdao University, Qingdao, Shandong 266000, P.R. China
| | - LiLi Wang
- Central Laboratories, Qingdao Municipal Hospital, Qingdao University, Qingdao, Shandong 266000, P.R. China
| | - XinYing Meng
- Department of Health Care, Qingdao Municipal Hospital, Qingdao University, Qingdao, Shandong 266000, P.R. China
| | - ChangHong Zhou
- Department of Health Care, Qingdao Municipal Hospital, Qingdao University, Qingdao, Shandong 266000, P.R. China
| | - YongNing Xin
- Department of Gastroenterology, Qingdao Municipal Hospital, Qingdao University, Qingdao, Shandong 266000, P.R. China
| | - WeiLi Sun
- Central Laboratories, Qingdao Municipal Hospital, Qingdao University, Qingdao, Shandong 266000, P.R. China.,Department of Gastroenterology, Qingdao Municipal Hospital, Qingdao University, Qingdao, Shandong 266000, P.R. China
| | - QuanJiang Dong
- Central Laboratories, Qingdao Municipal Hospital, Qingdao University, Qingdao, Shandong 266000, P.R. China.,Department of Gastroenterology, Qingdao Municipal Hospital, Qingdao University, Qingdao, Shandong 266000, P.R. China
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13
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Luo M, Hao Y, Tang M, Shi M, He F, Xie Y, Chen W. Application of a social media platform as a patient reminder in the treatment of Helicobacter pylori. Helicobacter 2020; 25:e12682. [PMID: 32088934 DOI: 10.1111/hel.12682] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/10/2019] [Revised: 12/31/2019] [Accepted: 02/03/2020] [Indexed: 01/10/2023]
Abstract
BACKGROUND To investigate the effect of a social media platform for the treatment of Helicobacter pylori infection. MATERIALS AND METHODS We enrolled 222 patients from October 2018 to June 2019, who required H pylori therapy. We used WeChat, a social media platform, as a patient reminder tool. They were randomly divided into the intervention and control groups (n = 111 per group) to compare and evaluate their disease awareness, medication adherence, incidence of adverse drug reactions, and H pylori eradication rate. RESULTS Patients in the intervention group had significantly better disease-related knowledge, medication adherence, and H pylori eradication rates than those in the control group (P < .05). CONCLUSIONS Using a social media platform may improve treatment rates of H pylori infection.
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Affiliation(s)
- Miaomiao Luo
- Department of Gastroenterology, The First Affiliated Hospital, Shihezi University School of Medicine, Xinjiang, China
| | - Yu Hao
- Department of Urology, The First Affiliated Hospital, Shihezi University School of Medicine, Xinjiang, China
| | - Ming Tang
- Department of Gastroenterology, The First Affiliated Hospital, Shihezi University School of Medicine, Xinjiang, China
| | - Mengzhen Shi
- Department of Gastroenterology, The First Affiliated Hospital, Shihezi University School of Medicine, Xinjiang, China
| | - Fengjuan He
- Department of Gastroenterology, The First Affiliated Hospital, Shihezi University School of Medicine, Xinjiang, China
| | - Yuanmao Xie
- Department of Gastroenterology, The First Affiliated Hospital, Shihezi University School of Medicine, Xinjiang, China
| | - Weigang Chen
- Department of Gastroenterology, The First Affiliated Hospital, Shihezi University School of Medicine, Xinjiang, China
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14
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Yu Y, Cai J, Song Z, Wang J, Wu L. Association of Helicobacter pylori infection with metabolic syndrome in aged Chinese females. Exp Ther Med 2019; 17:4403-4408. [PMID: 31105780 PMCID: PMC6507522 DOI: 10.3892/etm.2019.7509] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2018] [Accepted: 03/13/2019] [Indexed: 12/12/2022] Open
Abstract
The association between Helicobacter pylori (H. pylori) infection and metabolic syndrome (MetS) determined in different cohorts from different countries is currently inconclusive. In the majority of previous studies, H. pylori infection was diagnosed based on the presence of H. pylori IgG antibody in the serum. However, to the best of our knowledge, only few studies have investigated the association between H. pylori infection and MetS using the urea breath test (UBT) as a diagnostic tool. The present study was performed with the aim of providing a detailed analysis of the association between H. pylori infection, as diagnosed by the UBT method, and MetS in a large community from Zhejiang province in eastern China. The results indicated that H. pylori infection increases the risk of MetS in the aged female population.
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Affiliation(s)
- Yingying Yu
- Department of General Practice, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang 310000, P.R. China
| | - Jianting Cai
- Department of Gastroenterology, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang 310000, P.R. China
| | - Zhenya Song
- Department of General Practice, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang 310000, P.R. China
| | - Jinghua Wang
- Department of General Practice, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang 310000, P.R. China
| | - Lingyan Wu
- Department of General Practice, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang 310000, P.R. China
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15
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Whitmire JM, Merrell DS. Helicobacter pylori Genetic Polymorphisms in Gastric Disease Development. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2019; 1149:173-194. [DOI: 10.1007/5584_2019_365] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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16
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Chen Y, Wang X, Yu Y, Xiao Y, Huang J, Yao Z, Chen X, Zhou T, Li P, Xu C. Serum exosomes of chronic gastritis patients infected with Helicobacter pylori mediate IL-1α expression via IL-6 trans-signalling in gastric epithelial cells. Clin Exp Immunol 2018; 194:339-349. [PMID: 30105789 DOI: 10.1111/cei.13200] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/30/2018] [Indexed: 12/16/2022] Open
Abstract
Emerging evidence has linked the exosomes to many immunological disorders, including infectious diseases. However, knowledge regarding the role of exosomes in Helicobacter pylori infection is limited. Here, we show that serum exosomes from chronic gastritis patients with H. pylori infection (Hp exosomes) stimulate the expression of the soluble interleukin (IL)-6 receptor (sIL-6R), which is involved in IL-6 trans-signalling in gastric epithelial cells. Interestingly, sIL-6R up-regulates expression of the proinflammatory cytokine IL-1α, and the neutralization of sIL-6R suppresses IL-1α secretion. Thus, Hp exosomes regulate IL-1α expression via sIL-6R-mediated IL-6 trans-signaling. Altogether, this study reveals a novel perspective in which exosomes play a vital role in immunological mechanisms during H. pylori infection.
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Affiliation(s)
- Y Chen
- Department of Pediatrics, Ruijin Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - X Wang
- Department of Pediatrics, Ruijin Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Y Yu
- Department of Pediatrics, Ruijin Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Y Xiao
- Department of Pediatrics, Ruijin Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - J Huang
- Department of Pediatrics, Ruijin Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Z Yao
- Department of Pediatrics, Ruijin Hospital North, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - X Chen
- Department of Pediatrics, Ruijin Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - T Zhou
- Department of Pediatrics, Ruijin Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - P Li
- Department of Pediatrics, Ruijin Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - C Xu
- Department of Pediatrics, Ruijin Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
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17
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GONZÁLEZ I, ARAYA P, ROJAS A. Helicobacter Pylori Infection and Lung Cancer:
New Insights and Future Challenges. ZHONGGUO FEI AI ZA ZHI = CHINESE JOURNAL OF LUNG CANCER 2018; 21:658-662. [PMID: 30201063 PMCID: PMC6137001 DOI: 10.3779/j.issn.1009-3419.2018.09.03] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Subscribe] [Scholar Register] [Received: 05/10/2018] [Revised: 06/20/2018] [Accepted: 06/25/2018] [Indexed: 02/07/2023]
Abstract
Helicobacter pylori (H. pylori) is the causative agent of chronic gastritis and peptic ulcer diseases and is an important risk factor for the development functional dyspepsia, peptic ulceration, gastric adenocarcinoma and mucosa-associated lymphoid tissue lymphoma. H. pylori has very high rates of infection in human populations, and it is estimated that over 50% of the world population is infected. Recently, certain extra-gastric manifestations, linked to H. pylori infection, have been widely investigated. Noteworthy, a growing body of evidences supports an association between H. pylori infection with lung cancer. The present review intend to highlight not only the most recent evidences supporting this association, but also some missed points, which must be considered to validate this emerging association.
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Affiliation(s)
- Ileana GONZÁLEZ
- />Biomedical Research Laboratories, Medicine Faculty, Catholic University of Maule, Talca, Chile
| | - Paulina ARAYA
- />Biomedical Research Laboratories, Medicine Faculty, Catholic University of Maule, Talca, Chile
| | - Armando ROJAS
- />Biomedical Research Laboratories, Medicine Faculty, Catholic University of Maule, Talca, Chile
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18
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Scopel-Guerra A, Olivera-Severo D, Staniscuaski F, Uberti AF, Callai-Silva N, Jaeger N, Porto BN, Carlini CR. The Impact of Helicobacter pylori Urease upon Platelets and Consequent Contributions to Inflammation. Front Microbiol 2017; 8:2447. [PMID: 29312166 PMCID: PMC5733092 DOI: 10.3389/fmicb.2017.02447] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2017] [Accepted: 11/24/2017] [Indexed: 12/22/2022] Open
Abstract
Gastric infection by Helicobacter pylori is considered a risk factor for gastric and duodenal cancer, and extragastric diseases. Previous data have shown that, in a non-enzymatic way, H. pylori urease (HPU) activates neutrophils to produce ROS and also induces platelet aggregation, requiring ADP secretion modulated by the 12-lipoxygenase pathway, a signaling cascade also triggered by the physiological agonist collagen. Here we investigated further the effects on platelets of recombinant versions of the holoenzyme HPU, and of its two subunits (HpUreA and HpUreB). Although HpUreA had no aggregating activity on platelets, it partially inhibited collagen-induced aggregation. HpUreB induced platelet aggregation in the nanomolar range, and also interfered dose-dependently on both collagen- and ADP-induced platelet aggregation. HPU-induced platelet aggregation was inhibited by antibodies against glycoprotein VI (GPVI), the main collagen receptor in platelets. Flow cytometry analysis revealed exposure of P-selectin in HPU-activated platelets. Anti-glycoprotein IIbIIIa (GPIIbIIIa) antibodies increased the binding of FITC-labeled HPU to activated platelets, whereas anti-GPVI did not. Evaluation of post-transcriptional events in HPU-activated platelets revealed modifications in the pre-mRNA processing of pro-inflammatory proteins, with increased levels of mRNAs encoding IL-1β and CD14. We concluded that HPU activates platelets probably through its HpUreB subunit. Activation of platelets by HPU turns these cells into a pro-inflammatory phenotype. Altogether, our data suggest that H. pylori urease, besides allowing bacterial survival within the gastric mucosa, may have an important, and so far overlooked, role in gastric inflammation mediated by urease-activated neutrophils and platelets.
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Affiliation(s)
- Adriele Scopel-Guerra
- Center of Biotechnology, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
| | - Deiber Olivera-Severo
- Center of Biotechnology, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil.,Department of Biology, Universidade Regional Integrada do Alto Uruguai e das Missões, São Luiz Gonzaga, Brazil
| | - Fernanda Staniscuaski
- Center of Biotechnology, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil.,Department of Molecular Biology and Biotechnology, Institute of Biosciences, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
| | - Augusto F Uberti
- Center of Biotechnology, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil.,Institute of Biology, Universidade Federal de Pelotas, Pelotas, Brazil
| | - Natália Callai-Silva
- Center of Biotechnology, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
| | - Natália Jaeger
- Institute of Biomedical Research, Pontifícia Universidade Católica do Rio Grande do Sul, Porto Alegre, Brazil
| | - Bárbara N Porto
- Institute of Biomedical Research, Pontifícia Universidade Católica do Rio Grande do Sul, Porto Alegre, Brazil
| | - Celia R Carlini
- Brain Institute (BRAINS-InsCer), Pontifícia Universidade Católica do Rio Grande do Sul, Porto Alegre, Brazil
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19
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Liu H, Chen YT, Wang R, Chen XZ. Helicobacter pylori infection, atrophic gastritis, and pancreatic cancer risk: A meta-analysis of prospective epidemiologic studies. Medicine (Baltimore) 2017; 96:e7811. [PMID: 28816977 PMCID: PMC5571714 DOI: 10.1097/md.0000000000007811] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/30/2017] [Revised: 07/20/2017] [Accepted: 07/21/2017] [Indexed: 02/07/2023] Open
Abstract
BACKGROUND To investigate the associations of Helicobacter pylori (Hp) infection and atrophic gastritis (AG) with pancreatic cancer risk. METHODS A literature search in PubMed was performed up to July 2017. Only prospective cohort and nested case-control studies enrolling cancer-free participants were eligible. Incident pancreatic cancer cases were ascertained during the follow-up. The risks of pancreatic cancer were compared between persons infected and noninfected with Hp, or between those with and without AG status at baseline. Odds ratios (ORs) or hazard ratios were combined. Subgroup and sensitivity analyses were performed, and publication bias was estimated. RESULTS Three cohort studies and 6 nested case-control studies, including 65,155 observations, were analyzed. The meta-analyses did not confirm the association between pancreatic cancer risk and Hp infection (OR = 1.09, 95% confidence interval [CI] = 0.81-1.47) or AG status (OR = 1.18, 95% CI = 0.80-1.72). However, particular subpopulations potentially had increased risks of pancreatic cancer. Cytotoxin-associated gene A (CagA)-negative strains of Hp might be a causative factor of pancreatic cancer (OR = 1.30, 95% CI = 1.05-1.62), but a sensitivity analysis by leave-one-out method did not fully warrant it (OR = 1.20, 95% CI = 0.93-1.56). In 1 nested case-control study, AG at stomach corpus in Hp-negative subpopulation might have increased risk of pancreatic cancer, but with a poor test power = 0.56. Publication biases were nonsignificant in the present meta-analysis. CONCLUSION Based on current prospective epidemiologic studies, the linkage of pancreatic cancer to Hp infection or AG status was not warranted on the whole. Nevertheless, prospective studies only focusing on those specific subpopulations are further required to obtain better power.
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Affiliation(s)
- Hong Liu
- Department of Integrated Traditional Chinese and Western Medicine
| | | | - Rui Wang
- Nursing Section, Department of Gastroenterology
| | - Xin-Zu Chen
- Department of Gastrointestinal Surgery, West China Hospital, Sichuan University, Chengdu, China
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20
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Abstract
In current clinical practice, there is no optimal empirical therapy for Helicobacter pylori (H. pylori) infection and there is a progressive decrease in the efficiency of classical eradication therapy (ET) regimens. The variability in the efficiency of ET in a specific patient is largely due to the heterogeneous molecular genetic mechanisms underlying the resistance of the microorganism to the components of the treatment regimens. The basis of the mechanisms for antibiotic resistance in H. pylori is mainly the point mutations in some genes, which determine alterations in the mechanisms of action of drugs, such as clarithromycin (domain V of 23S rRNA), metronidazole (rdxA, frxA), amoxicillin (pbp1A), tetracycline (16S rRNA), and levofloxacin (gyrA). The predictors of resistance to ET are also the CagA-negative status of the microorganism and the presence of the vacA s2 allele. There are a number of host genetic determinants (the CYP2C19 genotype (*1/*1, *1/*17, *17/*17) and the MDR1 3435 T/T genotype (in an Asian population)) that reduce the efficiency of ET, by altering the pharmacokinetics of proton pump inhibitors. In addition, the IL-1β-511 C/C polymorphism that affects gastric acid secretion is a predictor of the inefficiency of ET.
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Affiliation(s)
- I V Maev
- A.I. Evdokimov Moscow State University of Medicine and Dentistry, Ministry of Health of Russia, Moscow, Russia
| | - D N Andreev
- A.I. Evdokimov Moscow State University of Medicine and Dentistry, Ministry of Health of Russia, Moscow, Russia
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