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Pădureanu V, Dop D, Caragea DC, Rădulescu D, Pădureanu R, Forțofoiu MC. Cardiovascular and Neurological Diseases and Association with Helicobacter Pylori Infection-An Overview. Diagnostics (Basel) 2024; 14:1781. [PMID: 39202269 PMCID: PMC11353373 DOI: 10.3390/diagnostics14161781] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2024] [Revised: 08/05/2024] [Accepted: 08/14/2024] [Indexed: 09/03/2024] Open
Abstract
This article investigates the link between Helicobacter pylori (H. pylori) infection and cardiovascular and neurological disorders. Recent research suggests that H. pylori may play a role in cardiovascular diseases like atherosclerosis, myocardial infarction, and stroke, as well as neurological diseases including Alzheimer's disease, multiple sclerosis, and Parkinson's disease. Cardiovascular Diseases: H. pylori induces endothelial dysfunction and chronic inflammation, promoting atherosclerotic plaque formation and other cardiac complications. High infection prevalence in cardiovascular patients implies that systemic inflammation from H. pylori accelerates disease progression. Eradication therapies combined with anti-inflammatory and lipid-lowering treatments may reduce cardiovascular risk. Neurological Diseases: H. pylori may contribute to Alzheimer's, multiple sclerosis, and Parkinson's through systemic inflammation, neuroinflammation, and autoimmune responses. Increased infection prevalence in these patients suggests bacterial involvement in disease pathogenesis. The eradication of H. pylori could reduce neuroinflammation and improve outcomes. Discussions and Future Research: Managing H. pylori infection in clinical practice could impact public health and treatment approaches. Further research is needed to clarify these relationships. Longitudinal and mechanistic studies are essential to fully understand H. pylori's role in these conditions. Conclusions: H. pylori infection is a potential risk factor for various cardiovascular and neurological conditions. Additional research is critical for developing effective prevention and treatment strategies. Targeted therapies, including H. pylori eradication combined with anti-inflammatory treatments, could improve clinical outcomes. These findings highlight the need for an integrated clinical approach to include H. pylori evaluation and treatment.
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Affiliation(s)
- Vlad Pădureanu
- Department of Internal Medicine, University of Medicine and Pharmacy Craiova, 200349 Craiova, Romania; (V.P.); (M.-C.F.)
| | - Dalia Dop
- Department of Pediatrics, University of Medicine and Pharmacy Craiova, 200349 Craiova, Romania;
| | - Daniel Cosmin Caragea
- Department of Nephrology, University of Medicine and Pharmacy Craiova, 200349 Craiova, Romania;
| | - Dumitru Rădulescu
- Department of Surgery, University of Medicine and Pharmacy Craiova, 200349 Craiova, Romania
| | - Rodica Pădureanu
- Department of Internal Medicine, University of Medicine and Pharmacy Craiova, 200349 Craiova, Romania; (V.P.); (M.-C.F.)
| | - Mircea-Cătălin Forțofoiu
- Department of Internal Medicine, University of Medicine and Pharmacy Craiova, 200349 Craiova, Romania; (V.P.); (M.-C.F.)
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2
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Kang DW, Lee JW, Park MY, Kim SH, Um YH, Wang SM, Lee CU, Lim HK. Impact of Helicobacter pylori eradication on age-specific risk of incident dementia in patients with peptic ulcer disease: a nationwide population-based cohort study. GeroScience 2024:10.1007/s11357-024-01284-z. [PMID: 39129052 DOI: 10.1007/s11357-024-01284-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2024] [Accepted: 07/09/2024] [Indexed: 08/13/2024] Open
Abstract
The impact of peptic ulcer disease (PUD) and Helicobacter pylori (H. pylori) eradication therapy on dementia risk in high H. pylori prevalence populations remains uncertain. This study investigates the relationship between PUD, H. pylori eradication, and dementia risk, including Alzheimer's disease (AD), in an elderly South Korean cohort, considering age and eradication timing. Data from the Korean National Health Insurance Service (2002-2015) for individuals aged 55-79 were analyzed. Participants were divided based on PUD and H. pylori therapy status. Propensity score matching was used to evaluate dementia incidence and hazard ratios over 5 and 10 years, alongside the timing of eradication therapy. PUD is linked to higher dementia risk at 5 and 10 years, more for overall dementia than AD, with eradication status not significantly altering the risk. Age-specific analysis showed increased AD risk in the 60s and 70s age groups. Late eradication therapy is correlated with a higher dementia risk. PUD is a risk factor for dementia in elderly South Koreans, particularly with delayed H. pylori therapy. The findings emphasize timely H. pylori management and its potential role in neurodegenerative disease prevention.
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Affiliation(s)
- Dong Woo Kang
- Department of Psychiatry, College of Medicine, The Catholic University of Korea, Seoul St. Mary's Hospital, Seoul, Republic of Korea
| | - Jung-Won Lee
- Department of Psychiatry, College of Medicine, The Catholic University of Korea, Seoul St. Mary's Hospital, Seoul, Republic of Korea
| | - Man Young Park
- Department of Data Science, Korea Institute of Oriental Medicine, Daejeon, Republic of Korea
| | - Sung-Hwan Kim
- Department of Psychiatry, College of Medicine, The Catholic University of Korea, Yeouido St. Mary's Hospital, 10, 63-Ro, Yeongdeungpo-Gu, Seoul, 06591, Republic of Korea
| | - Yoo Hyun Um
- Department of Psychiatry, College of Medicine, The Catholic University of Korea, St. Vincent's Hospital, Suwon, Republic of Korea
| | - Sheng-Min Wang
- Department of Psychiatry, College of Medicine, The Catholic University of Korea, Yeouido St. Mary's Hospital, 10, 63-Ro, Yeongdeungpo-Gu, Seoul, 06591, Republic of Korea
| | - Chang Uk Lee
- Department of Psychiatry, College of Medicine, The Catholic University of Korea, Seoul St. Mary's Hospital, Seoul, Republic of Korea
| | - Hyun Kook Lim
- Department of Psychiatry, College of Medicine, The Catholic University of Korea, Yeouido St. Mary's Hospital, 10, 63-Ro, Yeongdeungpo-Gu, Seoul, 06591, Republic of Korea.
- Research Institute, NEUROPHET Inc, Seoul, Republic of Korea.
- CMC Institute for Basic Medical Science, The Catholic Medical Center of The Catholic University of Korea, Seoul, Republic of Korea.
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Zhang F, Zhang H, Luo J, Xiao Y, Liu H, Zhang J. Association between Helicobacter pylori antibodies and otolaryngological diseases. Braz J Otorhinolaryngol 2024; 90:101488. [PMID: 39205365 PMCID: PMC11393579 DOI: 10.1016/j.bjorl.2024.101488] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2024] [Accepted: 07/24/2024] [Indexed: 09/04/2024] Open
Abstract
OBJECTIVE Observational studies have shown that Helicobacter pylori is related to some otolaryngological diseases. However, it is unclear if H. pylori infection causally affects these diseases. To elucidate H. pylori role in 12 common otolaryngological diseases, we conducted two-sample Mendelian randomization analysis. METHODS Single-nucleotide polymorphisms associated with 7 H. pylori antibodies (IgG, CagA, Catalase, GroEL, OMP, UREA and Vac A) served as instrumental variables. We primarily employed random-effects inverse variance weighting for causal estimation, supplemented by MR Egger, weighted median, simple mode, and weighted mode. Sensitivity analyses, including heterogeneity, pleiotropy, and leave-one-out tests, validated robustness. RESULTS MR analysis using inverse variance weighting (random effects) revealed genetically predicted H. pylori CagA antibodies correlated with increased risk of nonsuppurative otitis media (OR = 1.0778, 95% CI 1.0114-1.1487, p-value = 0.021). No causal relationship was observed between H. pylori antibodies and other common otolaryngological diseases. Sensitivity analyses found no pleiotropy or heterogeneity, affirming result reliability. CONCLUSION This study suggests that the levels of H. pylori CagA antibodies may contribute to the development of nonsuppurative otitis media. Further studies are needed in the future to elucidate the specific mechanism of H. pylori in this disease. LEVEL OF EVIDENCE Level III.
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Affiliation(s)
- Fang Zhang
- The Third People's Hospital of Chengdu, The Affiliated Hospital of Southwest Jiaotong University, Department of Otolaryngology Head and Neck Surgery, Chengdu, Sichuan, China; The Affiliated Hospital of North Sichuan Medical College, Department of Otolaryngology Head and Neck Surgery, Nanchong, Sichuan, China
| | - Haowei Zhang
- China West Normal University, Nanchong, Sichuan, China
| | - Jing Luo
- The Third People's Hospital of Chengdu, The Affiliated Hospital of Southwest Jiaotong University, Department of Otolaryngology Head and Neck Surgery, Chengdu, Sichuan, China
| | - Yixi Xiao
- The Third People's Hospital of Chengdu, The Affiliated Hospital of Southwest Jiaotong University, Department of Otolaryngology Head and Neck Surgery, Chengdu, Sichuan, China; The Affiliated Hospital of North Sichuan Medical College, Department of Otolaryngology Head and Neck Surgery, Nanchong, Sichuan, China
| | - Hai Liu
- The Affiliated Hospital of North Sichuan Medical College, Department of Otolaryngology Head and Neck Surgery, Nanchong, Sichuan, China
| | - Jianhui Zhang
- The Third People's Hospital of Chengdu, The Affiliated Hospital of Southwest Jiaotong University, Department of Otolaryngology Head and Neck Surgery, Chengdu, Sichuan, China.
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Hernández-Ruiz V, Roubaud-Baudron C, Von Campe H, Retuerto N, Mégraud F, Helmer C, Amieva H, Pérès K. Association between Helicobacter pylori infection and incident risk of dementia: The AMI cohort. J Am Geriatr Soc 2024; 72:1191-1198. [PMID: 38258504 DOI: 10.1111/jgs.18748] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2023] [Revised: 11/02/2023] [Accepted: 12/03/2023] [Indexed: 01/24/2024]
Abstract
BACKGROUND Chronic infectious diseases are increasingly being considered as potential contributors to dementia risk. Among those infections, Helicobacter pylori, the main cause of chronic gastritis worldwide, has been suggested. As the prevalence of H. pylori infection has decreased, the main objective of this work was to reconsider the association between H. pylori infection and the risk of incident dementia, including Alzheimer's disease. METHODS Prospective cohort of 689 older (≥65 years) agricultural workers from Southwest France. Descriptive and comparative analyses were performed according to H. pylori status determined by serology at baseline. The risk of incident dementia according to H. pylori status over a 7-year follow-up was explored by survival analyses: Kaplan-Meier curve and Cox proportional hazards models. RESULTS Two-hundred (29.0%) participants were H. pylori-positive at baseline. Compared to H. pylori-negative participants, they showed worse cognitive performances at baseline. Eighty-five incident dementia cases were diagnosed during the follow-up period. After adjustment for age, sex, education, apolipoprotein ε4, and several cardiovascular risk factors, H. pylori remained associated with an increased risk of dementia (HR 1.70, 95% CI, 1.05-2.74). The risk was stronger for Alzheimer's disease (HR 2.85, 95% CI, 1.58-5.12). CONCLUSIONS Despite an observed decrease in H. pylori infection prevalence, this study provides evidence for the association between H. pylori infection and dementia. These results should encourage further research on the mechanisms underlying the contribution of infectious diseases to pathological brain aging, especially the influence of gut inflammation on the brain.
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Affiliation(s)
- Virgilio Hernández-Ruiz
- INSERM, Bordeaux Population Health Research Center, UMR 1219, University of Bordeaux, Bordeaux, France
| | - Claire Roubaud-Baudron
- Pôle de Gérontologie Clinique, CHU Bordeaux, Bordeaux, France
- INSERM, UMR U1312 - BRIC, University of Bordeaux, Bordeaux, France
| | - Hugo Von Campe
- INSERM, Bordeaux Population Health Research Center, UMR 1219, University of Bordeaux, Bordeaux, France
| | - Noelia Retuerto
- INSERM, Bordeaux Population Health Research Center, UMR 1219, University of Bordeaux, Bordeaux, France
| | - Francis Mégraud
- INSERM, UMR U1312 - BRIC, University of Bordeaux, Bordeaux, France
| | - Catherine Helmer
- INSERM, Bordeaux Population Health Research Center, UMR 1219, University of Bordeaux, Bordeaux, France
| | - Hélène Amieva
- INSERM, Bordeaux Population Health Research Center, UMR 1219, University of Bordeaux, Bordeaux, France
| | - Karine Pérès
- INSERM, Bordeaux Population Health Research Center, UMR 1219, University of Bordeaux, Bordeaux, France
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5
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Beydoun MA, Beydoun HA, Hu YH, El-Hajj ZW, Georgescu MF, Noren Hooten N, Li Z, Weiss J, Lyall DM, Waldstein SR, Hedges DW, Gale SD, Launer LJ, Evans MK, Zonderman AB. Helicobacter pylori, persistent infection burden and structural brain imaging markers. Brain Commun 2024; 6:fcae088. [PMID: 38529358 PMCID: PMC10961948 DOI: 10.1093/braincomms/fcae088] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2023] [Revised: 01/11/2024] [Accepted: 03/11/2024] [Indexed: 03/27/2024] Open
Abstract
Persistent infections, whether viral, bacterial or parasitic, including Helicobacter pylori infection, have been implicated in non-communicable diseases, including dementia and other neurodegenerative diseases. In this cross-sectional study, data on 635 cognitively normal participants from the UK Biobank study (2006-21, age range: 40-70 years) were used to examine whether H. pylori seropositivity (e.g. presence of antibodies), serointensities of five H. pylori antigens and a measure of total persistent infection burden were associated with selected brain volumetric structural MRI (total, white, grey matter, frontal grey matter (left/right), white matter hyperintensity as percent intracranial volume and bi-lateral sub-cortical volumes) and diffusion-weighted MRI measures (global and tract-specific bi-lateral fractional anisotropy and mean diffusivity), after an average 9-10 years of lag time. Persistent infection burden was calculated as a cumulative score of seropositivity for over 20 different pathogens. Multivariable-adjusted linear regression analyses were conducted, whereby selected potential confounders (all measures) and intracranial volume (sub-cortical volumes) were adjusted, with stratification by Alzheimer's disease polygenic risk score tertile when exposures were H. pylori antigen serointensities. Type I error was adjusted to 0.007. We report little evidence of an association between H. pylori seropositivity and persistent infection burden with various volumetric outcomes (P > 0.007, from multivariable regression models), unlike previously reported in past research. However, H. pylori antigen serointensities, particularly immunoglobulin G against the vacuolating cytotoxin A, GroEL and outer membrane protein antigens, were associated with poorer tract-specific white matter integrity (P < 0.007), with outer membrane protein serointensity linked to worse outcomes in cognition-related tracts such as the external capsule, the anterior limb of the internal capsule and the cingulum, specifically at low Alzheimer's disease polygenic risk. Vacuolating cytotoxin A serointensity was associated with greater white matter hyperintensity volume among individuals with mid-level Alzheimer's disease polygenic risk, while among individuals with the highest Alzheimer's disease polygenic risk, the urease serointensity was consistently associated with reduced bi-lateral caudate volumes and the vacuolating cytotoxin A serointensity was linked to reduced right putamen volume (P < 0.007). Outer membrane protein and urease were associated with larger sub-cortical volumes (e.g. left putamen and right nucleus accumbens) at middle Alzheimer's disease polygenic risk levels (P < 0.007). Our results shed light on the relationship between H. pylori seropositivity, H. pylori antigen levels and persistent infection burden with brain volumetric structural measures. These data are important given the links between infectious agents and neurodegenerative diseases, including Alzheimer's disease, and can be used for the development of drugs and preventive interventions that would reduce the burden of those diseases.
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Affiliation(s)
- May A Beydoun
- Laboratory of Epidemiology and Population Sciences, National Institute on Aging, NIA/NIH/IRP, Baltimore, MD 21224, USA
| | - Hind A Beydoun
- Department of Research Programs, Fort Belvoir Community Hospital, Fort Belvoir, VA 22060, USA
| | - Yi-Han Hu
- Laboratory of Epidemiology and Population Sciences, National Institute on Aging, NIA/NIH/IRP, Baltimore, MD 21224, USA
| | - Ziad W El-Hajj
- Department of Biology, McGill University, Montreal, QC H3A 1B1, Canada
| | - Michael F Georgescu
- Laboratory of Epidemiology and Population Sciences, National Institute on Aging, NIA/NIH/IRP, Baltimore, MD 21224, USA
| | - Nicole Noren Hooten
- Laboratory of Epidemiology and Population Sciences, National Institute on Aging, NIA/NIH/IRP, Baltimore, MD 21224, USA
| | - Zhiguang Li
- Laboratory of Epidemiology and Population Sciences, National Institute on Aging, NIA/NIH/IRP, Baltimore, MD 21224, USA
| | - Jordan Weiss
- Stanford Center on Longevity, Stanford University, Stanford, CA 94305, USA
| | - Donald M Lyall
- School of Health and Wellbeing, University of Glasgow, Glasgow G12 8QQ, Scotland, UK
| | - Shari R Waldstein
- Department of Psychology, University of Maryland, Catonsville, MD 21250, USA
- Division of Gerontology, Geriatrics, and Palliative Medicine, Department of Medicine, University of Maryland School of Medicine, Baltimore, MD 21201, USA
| | - Dawson W Hedges
- Department of Psychology, Brigham Young University, Provo, UT 84602, USA
| | - Shawn D Gale
- Department of Psychology, Brigham Young University, Provo, UT 84602, USA
| | - Lenore J Launer
- Laboratory of Epidemiology and Population Sciences, National Institute on Aging, NIA/NIH/IRP, Baltimore, MD 21224, USA
| | - Michele K Evans
- Laboratory of Epidemiology and Population Sciences, National Institute on Aging, NIA/NIH/IRP, Baltimore, MD 21224, USA
| | - Alan B Zonderman
- Laboratory of Epidemiology and Population Sciences, National Institute on Aging, NIA/NIH/IRP, Baltimore, MD 21224, USA
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6
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Bicknell B, Liebert A, Borody T, Herkes G, McLachlan C, Kiat H. Neurodegenerative and Neurodevelopmental Diseases and the Gut-Brain Axis: The Potential of Therapeutic Targeting of the Microbiome. Int J Mol Sci 2023; 24:9577. [PMID: 37298527 PMCID: PMC10253993 DOI: 10.3390/ijms24119577] [Citation(s) in RCA: 18] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2023] [Revised: 04/28/2023] [Accepted: 05/23/2023] [Indexed: 06/12/2023] Open
Abstract
The human gut microbiome contains the largest number of bacteria in the body and has the potential to greatly influence metabolism, not only locally but also systemically. There is an established link between a healthy, balanced, and diverse microbiome and overall health. When the gut microbiome becomes unbalanced (dysbiosis) through dietary changes, medication use, lifestyle choices, environmental factors, and ageing, this has a profound effect on our health and is linked to many diseases, including lifestyle diseases, metabolic diseases, inflammatory diseases, and neurological diseases. While this link in humans is largely an association of dysbiosis with disease, in animal models, a causative link can be demonstrated. The link between the gut and the brain is particularly important in maintaining brain health, with a strong association between dysbiosis in the gut and neurodegenerative and neurodevelopmental diseases. This link suggests not only that the gut microbiota composition can be used to make an early diagnosis of neurodegenerative and neurodevelopmental diseases but also that modifying the gut microbiome to influence the microbiome-gut-brain axis might present a therapeutic target for diseases that have proved intractable, with the aim of altering the trajectory of neurodegenerative and neurodevelopmental diseases such as Alzheimer's disease, Parkinson's disease, multiple sclerosis, autism spectrum disorder, and attention-deficit hyperactivity disorder, among others. There is also a microbiome-gut-brain link to other potentially reversible neurological diseases, such as migraine, post-operative cognitive dysfunction, and long COVID, which might be considered models of therapy for neurodegenerative disease. The role of traditional methods in altering the microbiome, as well as newer, more novel treatments such as faecal microbiome transplants and photobiomodulation, are discussed.
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Affiliation(s)
- Brian Bicknell
- NICM Health Research Institute, University of Western Sydney, Westmead, NSW 2145, Australia; (A.L.); (H.K.)
| | - Ann Liebert
- NICM Health Research Institute, University of Western Sydney, Westmead, NSW 2145, Australia; (A.L.); (H.K.)
- Faculty of Medicine and Health, University of Sydney, Camperdown, NSW 2006, Australia
- Department of Governance and Research, Sydney Adventist Hospital, Wahroonga, NSW 2076, Australia;
| | - Thomas Borody
- Centre for Digestive Diseases, Five Dock, NSW 2046, Australia;
| | - Geoffrey Herkes
- Department of Governance and Research, Sydney Adventist Hospital, Wahroonga, NSW 2076, Australia;
| | - Craig McLachlan
- Centre for Healthy Futures, Torrens University Australia, Ultimo, NSW 2007, Australia;
| | - Hosen Kiat
- NICM Health Research Institute, University of Western Sydney, Westmead, NSW 2145, Australia; (A.L.); (H.K.)
- Centre for Healthy Futures, Torrens University Australia, Ultimo, NSW 2007, Australia;
- Macquarie Medical School, Macquarie University, Macquarie Park, NSW 2109, Australia
- ANU College of Health and Medicine, Australian National University, Canberra, ACT 2601, Australia
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7
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Malfertheiner P, Megraud F, Rokkas T, Gisbert JP, Liou JM, Schulz C, Gasbarrini A, Hunt RH, Leja M, O'Morain C, Rugge M, Suerbaum S, Tilg H, Sugano K, El-Omar EM. Management of Helicobacter pylori infection: the Maastricht VI/Florence consensus report. Gut 2022; 71:gutjnl-2022-327745. [PMID: 35944925 DOI: 10.1136/gutjnl-2022-327745] [Citation(s) in RCA: 418] [Impact Index Per Article: 209.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/29/2022] [Accepted: 06/21/2022] [Indexed: 01/06/2023]
Abstract
Helicobacter pyloriInfection is formally recognised as an infectious disease, an entity that is now included in the International Classification of Diseases 11th Revision. This in principle leads to the recommendation that all infected patients should receive treatment. In the context of the wide clinical spectrum associated with Helicobacter pylori gastritis, specific issues persist and require regular updates for optimised management.The identification of distinct clinical scenarios, proper testing and adoption of effective strategies for prevention of gastric cancer and other complications are addressed. H. pylori treatment is challenged by the continuously rising antibiotic resistance and demands for susceptibility testing with consideration of novel molecular technologies and careful selection of first line and rescue therapies. The role of H. pylori and antibiotic therapies and their impact on the gut microbiota are also considered.Progress made in the management of H. pylori infection is covered in the present sixth edition of the Maastricht/Florence 2021 Consensus Report, key aspects related to the clinical role of H. pylori infection were re-evaluated and updated. Forty-one experts from 29 countries representing a global community, examined the new data related to H. pylori infection in five working groups: (1) indications/associations, (2) diagnosis, (3) treatment, (4) prevention/gastric cancer and (5) H. pylori and the gut microbiota. The results of the individual working groups were presented for a final consensus voting that included all participants. Recommendations are provided on the basis of the best available evidence and relevance to the management of H. pylori infection in various clinical fields.
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Affiliation(s)
- Peter Malfertheiner
- Medical Department 2, LMU, Munchen, Germany
- Department of Radiology, LMU, Munchen, Germany
| | - Francis Megraud
- INSERM U853 UMR BaRITOn, University of Bordeaux, Bordeaux, France
| | - Theodore Rokkas
- Gastroenterology, Henry Dunant Hospital Center, Athens, Greece
- Medical School, European University, Nicosia, Cyprus
| | - Javier P Gisbert
- Gastroenterology, Hospital Universitario de La Princesa, Instituto de Investigación Sanitaria Princesa (IP), Madrid, Spain
- Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas (CIBEREHD), Madrid, Spain
| | - Jyh-Ming Liou
- Internal Medicine, National Taiwan University Hospital, Taipei, Taiwan
| | - Christian Schulz
- Medical Department 2, LMU, Munchen, Germany
- Partner Site Munich, DZIF, Braunschweig, Germany
| | - Antonio Gasbarrini
- Medicina Interna e Gastroenterologia, Fondazione Policlinico Universitario Gemelli IRCCS, Università Cattolica del Sacro Cuore Facoltà di Medicina e Chirurgia, Roma, Italy
| | - Richard H Hunt
- Medicine, McMaster University, Hamilton, Ontario, Canada
- Farncombe Family Digestive Health Research Institute, Hamilton, Ontario, Canada
| | - Marcis Leja
- Faculty of Medicine, University of Latvia, Riga, Latvia
- Institute of Clinical and Preventive Medicine, University of Latvia, Riga, Latvia
| | - Colm O'Morain
- Faculty of Health Sciences, Trinity College Dublin, Dublin, Ireland
| | - Massimo Rugge
- Department of Medicine (DIMED), Surgical Pathology & Cytopathology Unit, University of Padova, Padova, Italy
- Veneto Tumor Registry (RTV), Padova, Italy
| | - Sebastian Suerbaum
- Partner Site Munich, DZIF, Braunschweig, Germany
- Max von Pettenkofer Institute, LMU, Munchen, Germany
| | - Herbert Tilg
- Department of Internal Medicine I, Gastroenterology, Hepatology, Endocrinology & Metabolism, Medizinische Universitat Innsbruck, Innsbruck, Austria
| | - Kentaro Sugano
- Department of Medicine, Jichi Medical School, Tochigi, Japan
| | - Emad M El-Omar
- Department of Medicine, University of New South Wales, Sydney, New South Wales, Australia
- School of Medicine and Dentistry, University of Aberdeen, Aberdeen, UK
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8
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Hernandez-Ruiz V, Letenneur L, Fülöp T, Helmer C, Roubaud-Baudron C, Avila-Funes JA, Amieva H. Infectious diseases and cognition: do we have to worry? Neurol Sci 2022; 43:6215-6224. [PMID: 35867217 PMCID: PMC9305033 DOI: 10.1007/s10072-022-06280-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2022] [Accepted: 07/12/2022] [Indexed: 11/28/2022]
Affiliation(s)
- Virgilio Hernandez-Ruiz
- UMR 1219, Univ. Bordeaux, INSERM, Bordeaux Population Health Research Center, 33000, Bordeaux, France.
- Instituto Nacional de Ciencias Médicas Y Nutrición Salvador Zubirán, Mexico City, Mexico.
| | - Luc Letenneur
- UMR 1219, Univ. Bordeaux, INSERM, Bordeaux Population Health Research Center, 33000, Bordeaux, France
| | - Tamas Fülöp
- Research Center On Aging, Geriatric Division, Department of Medicine, Faculty of Medicine and Health Sciences, Université de Sherbrooke, Québec, Canada
| | - Catherine Helmer
- UMR 1219, Univ. Bordeaux, INSERM, Bordeaux Population Health Research Center, 33000, Bordeaux, France
| | - Claire Roubaud-Baudron
- CHU Bordeaux, Pôle de Gérontologie Clinique, 33000, Bordeaux, France
- Univ. Bordeaux, INSERM, UMR U1312 - BRIC, 33000, Bordeaux, France
| | - José-Alberto Avila-Funes
- UMR 1219, Univ. Bordeaux, INSERM, Bordeaux Population Health Research Center, 33000, Bordeaux, France
- Instituto Nacional de Ciencias Médicas Y Nutrición Salvador Zubirán, Mexico City, Mexico
| | - Hélène Amieva
- UMR 1219, Univ. Bordeaux, INSERM, Bordeaux Population Health Research Center, 33000, Bordeaux, France
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9
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Uberti AF, Callai-Silva N, Grahl MVC, Piovesan AR, Nachtigall EG, Furini CRG, Carlini CR. Helicobacter pylori Urease: Potential Contributions to Alzheimer’s Disease. Int J Mol Sci 2022; 23:ijms23063091. [PMID: 35328512 PMCID: PMC8949269 DOI: 10.3390/ijms23063091] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2021] [Revised: 03/09/2022] [Accepted: 03/10/2022] [Indexed: 11/24/2022] Open
Abstract
Alzheimer’s disease (AD) causes dementia and memory loss in the elderly. Deposits of beta-amyloid peptide and hyperphosphorylated tau protein are present in a brain with AD. A filtrate of Helicobacter pylori’s culture was previously found to induce hyperphosphorylation of tau in vivo, suggesting that bacterial exotoxins could permeate the blood–brain barrier and directly induce tau’s phosphorylation. H. pylori, which infects ~60% of the world population and causes gastritis and gastric cancer, produces a pro-inflammatory urease (HPU). Here, the neurotoxic potential of HPU was investigated in cultured cells and in rats. SH-SY5Y neuroblastoma cells exposed to HPU (50–300 nM) produced reactive oxygen species (ROS) and had an increased [Ca2+]i. HPU-treated BV-2 microglial cells produced ROS, cytokines IL-1β and TNF-α, and showed reduced viability. Rats received daily i.p., HPU (5 µg) for 7 days. Hyperphosphorylation of tau at Ser199, Thr205 and Ser396 sites, with no alterations in total tau or GSK-3β levels, and overexpression of Iba1, a marker of microglial activation, were seen in hippocampal homogenates. HPU was not detected in the brain homogenates. Behavioral tests were performed to assess cognitive impairments. Our findings support previous data suggesting an association between infection by H. pylori and tauopathies such as AD, possibly mediated by its urease.
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Affiliation(s)
- Augusto F. Uberti
- Laboratory of Neurotoxins, Brain Institute of Rio Grande do Sul (BRAINS) and Graduate Program in Medicine and Health Sciences, Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS), Porto Alegre CEP 90610-000, RS, Brazil; (A.F.U.); (N.C.-S.); (M.V.C.G.)
| | - Natalia Callai-Silva
- Laboratory of Neurotoxins, Brain Institute of Rio Grande do Sul (BRAINS) and Graduate Program in Medicine and Health Sciences, Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS), Porto Alegre CEP 90610-000, RS, Brazil; (A.F.U.); (N.C.-S.); (M.V.C.G.)
| | - Matheus V. C. Grahl
- Laboratory of Neurotoxins, Brain Institute of Rio Grande do Sul (BRAINS) and Graduate Program in Medicine and Health Sciences, Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS), Porto Alegre CEP 90610-000, RS, Brazil; (A.F.U.); (N.C.-S.); (M.V.C.G.)
| | - Angela R. Piovesan
- Center of Biotechnology, Graduate Program in Cellular and Molecular Biology, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre CEP 91501-970, RS, Brazil;
| | - Eduarda G. Nachtigall
- Laboratory of Cognition and Memory Neurobiology, Brain Institute of Rio Grande do Sul (BRAINS) and Graduate Program in Biomedical Gerontology, Pontifical Catholic University of Rio Grande do Sul (PUCRS), Porto Alegre CEP 90610-000, RS, Brazil; (E.G.N.); (C.R.G.F.)
| | - Cristiane R. G. Furini
- Laboratory of Cognition and Memory Neurobiology, Brain Institute of Rio Grande do Sul (BRAINS) and Graduate Program in Biomedical Gerontology, Pontifical Catholic University of Rio Grande do Sul (PUCRS), Porto Alegre CEP 90610-000, RS, Brazil; (E.G.N.); (C.R.G.F.)
| | - Celia Regina Carlini
- Laboratory of Neurotoxins, Brain Institute of Rio Grande do Sul (BRAINS) and Graduate Program in Medicine and Health Sciences, Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS), Porto Alegre CEP 90610-000, RS, Brazil; (A.F.U.); (N.C.-S.); (M.V.C.G.)
- Correspondence: ; Tel.: +55-51-3320-5986
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10
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Khodabakhsh P, Bazrgar M, Dargahi L, Mohagheghi F, Asgari Taei A, Parvardeh S, Ahmadiani A. Does Alzheimer's disease stem in the gastrointestinal system? Life Sci 2021; 287:120088. [PMID: 34715145 DOI: 10.1016/j.lfs.2021.120088] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2021] [Revised: 10/13/2021] [Accepted: 10/21/2021] [Indexed: 02/07/2023]
Abstract
Over the last decades, our knowledge of the key pathogenic mechanisms of Alzheimer's disease (AD) has dramatically improved. Regarding the limitation of current therapeutic strategies for the treatment of multifactorial diseases, such as AD, to be translated into the clinic, there is a growing trend in research to identify risk factors associated with the onset and progression of AD. Here, we review the current literature with a focus on the relationship between gastrointestinal (GI)/liver diseases during the lifespan and the incidence of AD, and discuss the possible mechanisms underlying the link between the diseases. We also aim to review studies evaluating the possible link between the chronic use of the most common GI medications and the future risk of AD development.
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Affiliation(s)
- Pariya Khodabakhsh
- Department of Pharmacology, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Maryam Bazrgar
- Neuroscience Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Leila Dargahi
- Neuroscience Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Fatemeh Mohagheghi
- Institute of Experimental Hematology, Center for Translational Cancer Research (TranslaTUM), School of Medicine, Technical University of Munich, Munich, Germany
| | - Afsaneh Asgari Taei
- Neuroscience Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Siavash Parvardeh
- Department of Pharmacology, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
| | - Abolhassan Ahmadiani
- Neuroscience Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
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11
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Liu NY, Sun JH, Jiang XF, Li H. Helicobacter pylori infection and risk for developing dementia: an evidence-based meta-analysis of case-control and cohort studies. Aging (Albany NY) 2021; 13:22571-22587. [PMID: 34559067 PMCID: PMC8507304 DOI: 10.18632/aging.203571] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2021] [Accepted: 08/23/2021] [Indexed: 01/02/2023]
Abstract
BACKGROUND Infection with multiple pathogens may play a key role in the pathogenesis of dementia. Whether Helicobacter pylori (H. pylori) infection is associated causally with dementia is controversial. OBJECTIVE We conduct a meta-analysis of case-control and cohort studies on the association between H. pylori infection and the risk for all-cause and Alzheimer's disease (AD) dementia. METHODS Two independent reviewers searched the PubMed, Cochrane Library, and Embase databases with English language restrictions from the date of conception to September 18, 2020. The primary analysis was as follows: the exposure variable was H. pylori infection, and the outcome was incident all-cause and AD dementia. Pooled odds ratios (OR), relative risk (RR), and corresponding 95% confidence intervals (CI) were obtained using the fixed-or random-effect model. Forest plots were generated to summarize the results. RESULTS Ten studies involving 96,561 participants were included in the meta-analysis: 5 case-control studies and 5 cohort studies. The overall pooled cohort studies showed a significant positive association between H. pylori infection and all-cause dementia with pooled RR of 1.36 (95% CI, 1.11-1.67). There was no association between H. pylori infection and risk for developing AD: RR of 1.33 (95% CI, 0.86-2.05) in cohort studies, and OR of 1.72 (95% CI, 0.97-3.04) in case-control studies. Significant heterogeneity was showed in each comparison group. CONCLUSION This meta-analysis supports a positive association between H. pylori infection and the risk of all-cause dementia, but not AD dementia. Due to the interference of confounding factors, randomized controlled trials are needed to prove their causality.
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Affiliation(s)
- Nan-Yang Liu
- Xiyuan Hospital, China Academy of Chinese Medical Sciences, Beijing, China
| | - Jia-Hui Sun
- Beijing University of Traditional Chinese Medicine, Beijing, China
| | - Xue-Fan Jiang
- Beijing University of Traditional Chinese Medicine, Beijing, China
| | - Hao Li
- Xiyuan Hospital, China Academy of Chinese Medical Sciences, Beijing, China
- Wangjing Hospital, China Academy of Chinese Medical Sciences, Beijing, China
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12
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Talari HR, Moniri R, Mollaghanbari M, Haddad Kashani H, Jalalian MN. Evaluating the relationship between Helicobacter pylori infection and carotid intima-media thickness a cross sectional study. Ann Med Surg (Lond) 2021; 69:102659. [PMID: 34471528 PMCID: PMC8387901 DOI: 10.1016/j.amsu.2021.102659] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2021] [Revised: 08/03/2021] [Accepted: 08/03/2021] [Indexed: 12/11/2022] Open
Abstract
Introduction Helicobacter pylori is a gram-negative spiral bacterium that is frequently found in the human stomach. Significant association has been reported between Cytotoxin associated gene A (CagA)- positive Helicobacter pylori strains and coronary heart disease. The aim of the present study is to investigate the carotid intima-media thickness as an indicator of atherosclerosis in people with Helicobacter pylori infection. Methods This study was done on patients who underwent upper GI endoscopy and biopsy, and after obtaining conscious consent underwent ultrasound of the right and left carotid arteries for measuring carotid intima-media thickness (CIMT) and blood tests. Results In this study, 90 patients who underwent upper GI endoscopy were examined in three groups: negative H. pylori negative, positive cagA and negative cagA. The right, left and average of CIMT in cagA-positive group were significantly higher than the other two groups (p < 0.05). Howerver, the average of CIMT was not significantly different between men and women. Also, the hsCRP average level in positive cagA group was significantly higher than other groups (p < 0.05). Conclusion Our findings suggest that there is an increase in CIMT values in patients with H. pylori infection, especially in cases of positive cagA. The positive cagA group showed significantly higher levels of hs-CRP, as a marker of elevated inflammatory response. Therefore, H. pylori infection, especially cagA-positive strains and its associated systemic inflammatory response can be considered as a contributing factor in atherosclerosis and cardiovascular disease. H.pylori infection especially in case of positive CagA+ caused the right/left CIMT increase. Higher levels of inflammation in H.pylori, CagA patients and atherosclerosis risk factors couldn’t cause the significant difference. H.pylori infection with positive CagA and its inflammation is an important factor in atherosclerosis and cardiovascular diseases.
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Affiliation(s)
- Hamid Reza Talari
- Anatomical Sciences Research Center, Institute for Basic Sciences, Kashan University of Medical Sciences, Kashan, Iran.,Department of Radiology, School of Medicine, Kashan University of Medical Sciences, Kashan, Iran
| | - Rezvan Moniri
- Anatomical Sciences Research Center, Institute for Basic Sciences, Kashan University of Medical Sciences, Kashan, Iran
| | - Mohammadreza Mollaghanbari
- Department of Internal Medicine, School of Medicine, Kashan University of Medical Sciences, Kashan, Iran
| | - Hamed Haddad Kashani
- Anatomical Sciences Research Center, Institute for Basic Sciences, Kashan University of Medical Sciences, Kashan, Iran
| | - Mohammad Naser Jalalian
- Anatomical Sciences Research Center, Institute for Basic Sciences, Kashan University of Medical Sciences, Kashan, Iran.,Department of Radiology, School of Medicine, Kashan University of Medical Sciences, Kashan, Iran
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13
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Helicobacter pylori Infection and Extragastric Diseases-A Focus on the Central Nervous System. Cells 2021; 10:cells10092191. [PMID: 34571840 PMCID: PMC8469861 DOI: 10.3390/cells10092191] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2021] [Revised: 08/22/2021] [Accepted: 08/23/2021] [Indexed: 02/07/2023] Open
Abstract
Helicobacter pylori (H. pylori) is most known to cause a wide spectrum of gastrointestinal impairments; however, an increasing number of studies indicates that H. pylori infection might be involved in numerous extragastric diseases such as neurological, dermatological, hematologic, ocular, cardiovascular, metabolic, hepatobiliary, or even allergic diseases. In this review, we focused on the nervous system and aimed to summarize the findings regarding H. pylori infection and its involvement in the induction/progression of neurological disorders. Neurological impairments induced by H. pylori infection are primarily due to impairments in the gut-brain axis (GBA) and to an altered gut microbiota facilitated by H. pylori colonization. Currently, regarding a potential relationship between Helicobacter infection and neurological disorders, most of the studies are mainly focused on H. pylori.
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14
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Park J, Kim TJ, Song JH, Jang H, Kim JS, Kang SH, Kim HR, Hwangbo S, Shin HY, Na DL, Seo SW, Kim HJ, Kim JJ. Helicobacter Pylori Infection Is Associated with Neurodegeneration in Cognitively Normal Men. J Alzheimers Dis 2021; 82:1591-1599. [PMID: 34180413 DOI: 10.3233/jad-210119] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
BACKGROUND An association between Helicobacter pylori (H. pylori) infection and dementia was reported in previous studies; however, the evidence is inconsistent. OBJECTIVE In the present study, the association between H. pylori infection and brain cortical thickness as a biomarker of neurodegeneration was investigated. METHODS A cross-sectional study of 822 men who underwent a medical health check-up, including an esophagogastroduodenoscopy and 3.0 T magnetic resonance imaging, was performed. H. pylori infection status was assessed based on histology. Multiple linear regression analyses were conducted to evaluate the relationship between H. pylori infection and brain cortical thickness. RESULTS Men with H. pylori infection exhibited overall brain cortical thinning (p = 0.022), especially in the parietal (p = 0.008) and occipital lobes (p = 0.050) compared with non-infected men after adjusting for age, educational level, alcohol intake, smoking status, and intracranial volume. 3-dimentional topographical analysis showed that H. pylori infected men had cortical thinning in the bilateral lateral temporal, lateral frontal, and right occipital areas compared with non-infected men with the same adjustments (false discovery rate corrected, Q < 0.050). The association remained significant after further adjusting for inflammatory marker (C-reactive protein) and metabolic factors (obesity, dyslipidemia, fasting glucose, and blood pressure). CONCLUSION Our results indicate H. pylori infection is associated with neurodegenerative changes in cognitive normal men. H. pylori infection may play a pathophysiologic role in the neurodegeneration and further studies are needed to validate this association.
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Affiliation(s)
- Jaehong Park
- Department of Neurology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea.,Alzheimer's Disease Convergence Research Center, Samsung Medical Center, Seoul, Korea
| | - Tae Jun Kim
- Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Joo Hye Song
- Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Hyemin Jang
- Department of Neurology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea.,Alzheimer's Disease Convergence Research Center, Samsung Medical Center, Seoul, Korea
| | - Ji Sun Kim
- Department of Neurology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea.,Alzheimer's Disease Convergence Research Center, Samsung Medical Center, Seoul, Korea
| | - Sung Hoon Kang
- Department of Neurology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea.,Alzheimer's Disease Convergence Research Center, Samsung Medical Center, Seoul, Korea.,Department of Neurology, Korea University Guro Hospital, Korea University College of Medicine, Seoul, Korea
| | - Hang-Rai Kim
- Department of Neurology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea.,Alzheimer's Disease Convergence Research Center, Samsung Medical Center, Seoul, Korea.,Department of Neurology, Dongguk University Ilsan Hospital, Dongguk University College of Medicine, Goyang, Korea
| | - Song Hwangbo
- Department of Neurology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea.,Alzheimer's Disease Convergence Research Center, Samsung Medical Center, Seoul, Korea
| | - Hee Young Shin
- Center for Health Promotion, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Duk L Na
- Department of Neurology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea.,Alzheimer's Disease Convergence Research Center, Samsung Medical Center, Seoul, Korea.,Department of Health Science and Technology, SAIHST, Sungkyunkwan University, Seoul, Korea
| | - Sang Won Seo
- Department of Neurology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea.,Alzheimer's Disease Convergence Research Center, Samsung Medical Center, Seoul, Korea.,Department of Health Science and Technology, SAIHST, Sungkyunkwan University, Seoul, Korea.,Department of Intelligent Precision Healthcare Convergence, Sungkyunkwan University, Suwon, Korea
| | - Hee Jin Kim
- Department of Neurology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea.,Alzheimer's Disease Convergence Research Center, Samsung Medical Center, Seoul, Korea.,Department of Health Science and Technology, SAIHST, Sungkyunkwan University, Seoul, Korea.,Department of Digital Health, SAIHST, Sungkyunkwan University, Seoul, Korea
| | - Jae J Kim
- Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
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15
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Chen Q, Wu J, Dong X, Yin H, Shi X, Su S, Che B, Li Y, Yang J. Gut flora-targeted photobiomodulation therapy improves senile dementia in an Aß-induced Alzheimer's disease animal model. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY. B, BIOLOGY 2021; 216:112152. [PMID: 33610085 DOI: 10.1016/j.jphotobiol.2021.112152] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/02/2020] [Revised: 12/25/2020] [Accepted: 02/05/2021] [Indexed: 01/13/2023]
Abstract
BACKGROUND Emerging evidence suggests that the gut microbiota plays an important role in the pathological progression of Alzheimer's disease (AD). Photobiomodulation (PBM) therapy is believed to have a positive regulatory effect on the imbalance of certain body functions, including inflammation, immunity, wound healing, nerve repair, and pain. Previous studies have found that the intestinal flora of patients with AD is in an unbalanced state. Therefore, we have proposed the use of gut flora-targeted PBM (gf-targeted PBM) as a method to improve AD in an Aß-induced AD mouse model. METHODS PBM was performed on the abdomen of the mice at the wavelengths of 630 nm, 730 nm, and 850 nm at 100 J/cm2 for 8 weeks. Morris water maze test, immunofluorescence and proteomic of hippocampus, and intestinal flora detection of fecal were used to evaluate the treatment effects of gf-targeted PBM on AD rats. RESULTS PBM at all three wavelengths (especially 630 nm and 730 nm) significantly improved learning retention as measured by the Morris water maze. In addition, we found reduced amyloidosis and tau phosphorylation in the hippocampus by immunofluorescence in AD mice. By using a quantitative proteomic analysis of the hippocampus, we found that gf-targeted PBM significantly altered the expression levels of 509 proteins (the same differentially expressed proteins in all three wavelengths of PBM), which involved the pathways of hormone synthesis, phagocytosis, and metabolism. The 16 s rRNA gene sequencing of fecal contents showed that PBM significantly altered the diversity and abundance of intestinal flora. Specifically, PBM treatment reversed the typical increase of Helicobacter and uncultured Bacteroidales and the decrease of Rikenella seen in AD mice. CONCLUSIONS Our data indicate that gf-targeted PBM regulates the diversity of intestinal flora, which may improve damage caused by AD. Gf-targeted PBM has the potential to be a noninvasive microflora regulation method for AD patients.
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Affiliation(s)
- Qianqian Chen
- Laser Medicine Laboratory, Institute of Biomedical Engineering, Chinese Academy of Medical Science & Peking Union Medical College, Tianjin 300192, China; Beijing Key Laboratory of Rehabilitation Technical Aids for Old-Age Disability, National Research Center for Rehabilitation Technical Aids, Beijing 100176, China
| | - Jinpeng Wu
- Laser Medicine Laboratory, Institute of Biomedical Engineering, Chinese Academy of Medical Science & Peking Union Medical College, Tianjin 300192, China
| | - Xiaoxi Dong
- Laser Medicine Laboratory, Institute of Biomedical Engineering, Chinese Academy of Medical Science & Peking Union Medical College, Tianjin 300192, China
| | - Huijuan Yin
- Laser Medicine Laboratory, Institute of Biomedical Engineering, Chinese Academy of Medical Science & Peking Union Medical College, Tianjin 300192, China.
| | - Xiafei Shi
- Laser Medicine Laboratory, Institute of Biomedical Engineering, Chinese Academy of Medical Science & Peking Union Medical College, Tianjin 300192, China
| | - Siying Su
- Laser Medicine Laboratory, Institute of Biomedical Engineering, Chinese Academy of Medical Science & Peking Union Medical College, Tianjin 300192, China
| | - Bochen Che
- Laser Medicine Laboratory, Institute of Biomedical Engineering, Chinese Academy of Medical Science & Peking Union Medical College, Tianjin 300192, China
| | - Yingxin Li
- Laser Medicine Laboratory, Institute of Biomedical Engineering, Chinese Academy of Medical Science & Peking Union Medical College, Tianjin 300192, China.
| | - Jichun Yang
- Laser Medicine Laboratory, Institute of Biomedical Engineering, Chinese Academy of Medical Science & Peking Union Medical College, Tianjin 300192, China
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16
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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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17
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Zilli EM, O’Donnell A, Salinas J, Aparicio HJ, Gonzales MM, Jacob M, Beiser A, Seshadri S. Herpes Labialis, Chlamydophila pneumoniae, Helicobacter pylori, and Cytomegalovirus Infections and Risk of Dementia: The Framingham Heart Study. J Alzheimers Dis 2021; 82:593-605. [PMID: 34057145 PMCID: PMC8903174 DOI: 10.3233/jad-200957] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
BACKGROUND An association between chronic infectious diseases and development of dementia has been suspected for decades, based on the finding of pathogens in postmortem brain tissue and on serological evidence. However, questions remain regarding confounders, reverse causality, and how accurate, reproducible and generalizable those findings are. OBJECTIVE Investigate whether exposure to Herpes simplex (manifested as herpes labialis), Chlamydophila pneumoniae (C. pneumoniae), Helicobacter pylori (H. pylori), and cytomegalovirus (CMV) modifies the risk of dementia in a populational cohort. METHODS Questionnaires regarding incidence of herpes infections were administered to Original Framingham Study participants (n = 2,632). Serologies for C. pneumoniae, H. pylori, and CMV were obtained in Original (n = 2,351) and Offspring cohort (n = 3,687) participants. Participants are under continuous dementia surveillance. Brain MRI and neuropsychological batteries were administered to Offspring participants from 1999-2005. The association between each infection and incident dementia was tested with Cox models. Linear models were used to investigate associations between MRI or neuropsychological parameters and serologies. RESULTS There was no association between infection serologies and dementia incidence, total brain volume, and white matter hyperintensities. Herpes labialis was associated with reduced 10-year dementia risk (HR 0.66, CI 0.46-0.97), but not for the duration of follow-up. H. pylori antibodies were associated with worse global cognition (β -0.14, CI -0.22, -0.05). CONCLUSION We found no association between measures of chronic infection and incident dementia, except for a reduction in 10-year dementia risk for patients with herpes labialis. This unexpected result requires confirmation and further characterization, concerning antiviral treatment effects and capture of episodes.
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Affiliation(s)
- Eduardo Marques Zilli
- Glenn Biggs Institute of Alzheimer’s and Neurodegenerative Diseases, University of Texas Health Science Center, San Antonio, TX, USA
| | | | - Joel Salinas
- New York University Grossman School of Medicine, New York, NY, USA
| | - Hugo J. Aparicio
- Boston University School of Medicine, Boston, MA, USA
- Framingham Heart Study, Framingham, MA, USA
| | - Mitzi Michelle Gonzales
- Glenn Biggs Institute of Alzheimer’s and Neurodegenerative Diseases, University of Texas Health Science Center, San Antonio, TX, USA
| | - Mini Jacob
- Glenn Biggs Institute of Alzheimer’s and Neurodegenerative Diseases, University of Texas Health Science Center, San Antonio, TX, USA
| | - Alexa Beiser
- Boston University School of Public Health, Boston, MA, USA
- Boston University School of Medicine, Boston, MA, USA
| | - Sudha Seshadri
- Glenn Biggs Institute of Alzheimer’s and Neurodegenerative Diseases, University of Texas Health Science Center, San Antonio, TX, USA
- Boston University School of Public Health, Boston, MA, USA
- Boston University School of Medicine, Boston, MA, USA
- Framingham Heart Study, Framingham, MA, USA
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18
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Gravina AG, Priadko K, Ciamarra P, Granata L, Facchiano A, Miranda A, Dallio M, Federico A, Romano M. Extra-Gastric Manifestations of Helicobacter pylori Infection. J Clin Med 2020; 9:jcm9123887. [PMID: 33265933 PMCID: PMC7761397 DOI: 10.3390/jcm9123887] [Citation(s) in RCA: 41] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2020] [Revised: 11/21/2020] [Accepted: 11/26/2020] [Indexed: 12/13/2022] Open
Abstract
Helicobacter Pylori (H. pylori) is a Gram-negative flagellated microorganism that has been extensively studied since its first isolation due to its widespread diffusion and association with numerous diseases. While the bacterium is proved to be a causative factor for a number of gastric diseases such as gastritis, gastric adenocarcinoma, and MALT-lymphoma, its role at other gastrointestinal levels and in other systems is being thoroughly studied. In this article, we reviewed the latest published clinical and laboratory studies that investigated associations of H. pylori with hematologic diseases such as Vitamin B12- and iron-deficiency anemia, primary immune thrombocytopenia, and with a number of dermatologic and ophthalmic diseases. In addition, the putative role of the bacterium in inflammatory bowel diseases, esophageal disorders, metabolic, diseases, neurologic diseases and allergy were outlined.
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Affiliation(s)
| | | | | | | | | | | | | | | | - Marco Romano
- Correspondence: (A.G.G.); (M.R.); Tel.: +39-3382465767 (A.G.G.)
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19
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Albaret G, Sifré E, Floch P, Laye S, Aubert A, Dubus P, Azzi-Martin L, Giese A, Salles N, Mégraud F, Varon C, Lehours P, Roubaud-Baudron C. Alzheimer's Disease and Helicobacter pylori Infection: Inflammation from Stomach to Brain? J Alzheimers Dis 2020; 73:801-809. [PMID: 31868664 DOI: 10.3233/jad-190496] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Despite extensive research, the origin of Alzheimer's disease (AD) remains unknown. The role of infectious pathogens has recently emerged. Epidemiological studies have shown that Helicobacter pylori infection increases the risk of developing AD. We hypothesized that H. pylori-induced gastritis may be associated with a systemic inflammation and finally neuroinflammation. C57BL/6 mice were infected with H. pylori (n = 15) or Helicobacter felis (n = 13) or left uninfected (n = 9) during 18 months. Gastritis, amyloid deposition, astroglial and microglial cell area, and systemic and brain cytokines were assessed. The infection (H. felis> H. pylori) induced a severe gastritis and an increased neuroinflammation but without brain amyloid deposition or systemic inflammation.
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Affiliation(s)
- Guillaume Albaret
- University of Bordeaux, UMR BaRITOn, INSERM 1053, Bordeaux, France.,CHU Bordeaux, Pôle de Gérontologie Clinique, Bordeaux, France
| | - Elodie Sifré
- University of Bordeaux, UMR BaRITOn, INSERM 1053, Bordeaux, France
| | - Pauline Floch
- University of Bordeaux, UMR BaRITOn, INSERM 1053, Bordeaux, France
| | - Sophie Laye
- University of Bordeaux, NutriNeuro, INRA 1286, Bordeaux, France
| | - Agnès Aubert
- University of Bordeaux, NutriNeuro, INRA 1286, Bordeaux, France
| | - Pierre Dubus
- University of Bordeaux, UMR BaRITOn, INSERM 1053, Bordeaux, France.,CHU Bordeaux, Service de biologie des tumeurs - tumorothèque, Bordeaux, France
| | | | - Alban Giese
- University of Bordeaux, UMR BaRITOn, INSERM 1053, Bordeaux, France
| | - Nathalie Salles
- University of Bordeaux, UMR BaRITOn, INSERM 1053, Bordeaux, France.,CHU Bordeaux, Pôle de Gérontologie Clinique, Bordeaux, France
| | - Francis Mégraud
- University of Bordeaux, UMR BaRITOn, INSERM 1053, Bordeaux, France.,CHU Bordeaux, Service de biologie des tumeurs - tumorothèque, Bordeaux, France
| | - Christine Varon
- University of Bordeaux, UMR BaRITOn, INSERM 1053, Bordeaux, France
| | - Philippe Lehours
- University of Bordeaux, UMR BaRITOn, INSERM 1053, Bordeaux, France.,CHU Bordeaux, Service de biologie des tumeurs - tumorothèque, Bordeaux, France
| | - Claire Roubaud-Baudron
- University of Bordeaux, UMR BaRITOn, INSERM 1053, Bordeaux, France.,CHU Bordeaux, Pôle de Gérontologie Clinique, Bordeaux, France
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20
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Kamer AR, Craig RG, Niederman R, Fortea J, de Leon MJ. Periodontal disease as a possible cause for Alzheimer's disease. Periodontol 2000 2020; 83:242-271. [PMID: 32385876 DOI: 10.1111/prd.12327] [Citation(s) in RCA: 69] [Impact Index Per Article: 17.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2019] [Accepted: 06/23/2019] [Indexed: 12/13/2022]
Abstract
Approximately 47 million people worldwide have been diagnosed with dementia, 60%-80% of whom have dementia of the Alzheimer's disease type. Unfortunately, there is no cure in sight. Defining modifiable risk factors for Alzheimer's disease may have a significant impact on its prevalence. An increasing body of evidence suggests that chronic inflammation and microbial dysbiosis are risk factors for Alzheimer's disease. Periodontal disease is a chronic inflammatory disease that develops in response to response to microbial dysbiosis. Many studies have shown an association between periodontal disease and Alzheimer's disease. The intent of this paper was to review the existing literature and determine, using the Bradford Hill criteria, whether periodontal disease is causally related to Alzheimer's disease.
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Affiliation(s)
- Angela R Kamer
- Department of Periodontology and Implant Dentistry, New York University, College of Dentistry, New York, New York, USA
| | - Ronald G Craig
- Department of Periodontology and Implant Dentistry, New York University, College of Dentistry, New York, New York, USA.,Department of Basic Sciences and Craniofacial Biology, New York University, College of Dentistry, New York, New York, USA
| | - Richard Niederman
- Department of Epidemiology and Health Promotion, New York University, College of Dentistry, New York, New York, USA
| | - Juan Fortea
- Alzheimer Down Unit, Department of Neurology, Hospital de la Santa Creu i Sant Pau- Biomedical Research Institute Sant Pau- Universitat Autònoma de Barcelona and Barcelona Down Medical Center, Fundació Catalana Síndrome de Down, Barcelona, Spain.,Alzheimer's Disease and Other Cognitive Disorders Unit, Neurology Service, Hospital Clínic, Barcelona, Spain
| | - Mony J de Leon
- Department of Radiology, Brain Health Imaging Institute, Weill Cornell Medicine, New York, New York, USA
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21
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Doulberis M, Kotronis G, Gialamprinou D, Polyzos SA, Papaefthymiou A, Katsinelos P, Kountouras J. Alzheimer's disease and gastrointestinal microbiota; impact of Helicobacter pylori infection involvement. Int J Neurosci 2020; 131:289-301. [PMID: 32125206 DOI: 10.1080/00207454.2020.1738432] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Background: Alzheimer disease (AD) is a leading cause of global burden with great impact on societies. Although research is working intensively on promising therapy, the problem remains up-to-date. Among the various proposed hypotheses regarding causality and therapy, emerging evidence supports the hypothesis that gastrointestinal microbiota through the so-called 'gut-brain axis' interacts with immune system and brain and shape the balance between homeostasis and disease; the involvement of gastrointestinal microbiota in the pathophysiology of AD is less defined, even though the role of 'gut-brain axis' has been well verified for other neurodegenerative conditions.Methods: We performed a systematic review of PubMed/MEDLINE database from 1st January 1990 to 17th October 2018, to investigate the accessible literature regarding possible association between AD and gastrointestinal microbiota. Inclusion criteria were available full text in English language, original clinical papers implicating AD patients and any sort of gastrointestinal microbiota.Results: Through our query, an initial number of 241 papers has been identified. After removing duplicates and through an additional manual search, twenty-four papers met our inclusion criteria. The great majority of eligible publications supported a possible connection between AD and gastrointestinal microbiota. The most common investigated microorganism was Helicobacter pylori.Conclusion: Our own systematic review, showed a possible association between AD and gastrointestinal microbiota mainly including Helicobacter pylori, and thus further research is required for substantiation of causality as well as for the establishment of promising novel therapies.
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Affiliation(s)
- Michael Doulberis
- Department of Gastroenterology and Hepatology, University of Zurich, Zurich, Switzerland.,Department of Internal Medicine, Second Medical Clinic, Ippokration Hospital, Aristotle University of Thessaloniki, Thessaloniki, Macedonia, Greece.,First Department of Pharmacology, Medical School, Aristotle University of Thessaloniki, Thessaloniki, Macedonia, Greece
| | - Georgios Kotronis
- Department of Internal Medicine, General Hospital Agios Pavlos of Thessaloniki, Thessaloniki, Macedonia, Greece
| | - Dimitra Gialamprinou
- Department of Pediatrics, Papageorgiou University Hospital, Aristotle University of Thessaloniki, Thessaloniki, Macedonia, Greece
| | - Stergios A Polyzos
- First Department of Pharmacology, Medical School, Aristotle University of Thessaloniki, Thessaloniki, Macedonia, Greece
| | - Apostolis Papaefthymiou
- Department of Internal Medicine, Second Medical Clinic, Ippokration Hospital, Aristotle University of Thessaloniki, Thessaloniki, Macedonia, Greece
| | - Panagiotis Katsinelos
- Department of Internal Medicine, Second Medical Clinic, Ippokration Hospital, Aristotle University of Thessaloniki, Thessaloniki, Macedonia, Greece
| | - Jannis Kountouras
- Department of Internal Medicine, Second Medical Clinic, Ippokration Hospital, Aristotle University of Thessaloniki, Thessaloniki, Macedonia, Greece
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22
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Papaefthymiou A, Liatsos C, Georgopoulos SD, Apostolopoulos P, Doulberis M, Kyriakos N, Giakoumis M, Papadomichelakis M, Galanopoulos M, Katsinelos P, Rokkas T, Kountouras J. Helicobacter pylori eradication regimens in an antibiotic high-resistance European area: A cost-effectiveness analysis. Helicobacter 2020; 25:e12666. [PMID: 31692137 DOI: 10.1111/hel.12666] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/26/2019] [Revised: 10/04/2019] [Accepted: 10/04/2019] [Indexed: 12/13/2022]
Abstract
INTRODUCTION Helicobacter pylori infection (H pylori-I) affects more than half of the global population and consists an important burden to public health and healthcare expenditures, by contributing to many diseases' pathogenesis. AIM This study aimed to evaluate the current nonbismuth quadruple eradication regimens in a high antibiotic resistance area, such as Greece, concerning their cost-effectiveness, especially during financial crisis period. MATERIALS AND METHODS Eight hundred and nine patients who received eradication treatment against H pylori-I were included to evaluate five different regimens, using amoxicillin, clarithromycin, and metronidazole as antibiotics and one proton-pump inhibitor, based on their current eradication rates. Regimes compared 10-day concomitant use of (a) pantoprazole or (b) esomeprazole; 10-day sequential use of (c) pantoprazole or (d) esomeprazole; and 14-day hybrid using esomeprazole. Cost-effectiveness analysis ratio (CEAR) and incremental cost-effectiveness ratios were calculated taking into account all direct costs and cases who needed second-line treatment. Additionally, sensitivity analysis was performed to predict all potential combinations. RESULTS Ten-day concomitant regimen with esomeprazole was characterized by the lowest CEAR (179.17€) followed by the same regimen using pantoprazole (183.27€). Hybrid regimen, although equivalent in eradication rates, was found to have higher CEAR (187.42€), whereas sequential regimens were not cost-effective (CEAR: 204.12€ and 216.02€ respectively). DISCUSSION This is the first study evaluating the cost-effectiveness of H pylori-I treatment regimens in a high clarithromycin-resistance (≈26.5%) European area, suggesting the 10-day concomitant regimen with generics using esomeprazole 40 mg as the most appropriate one. National and regional guidelines should include cost-effectiveness in their statements, and further studies are required to clarify the necessity of a wide "test and treat" policy for H pylori-I.
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Affiliation(s)
| | - Christos Liatsos
- Department of Gastroenterology, 401 Army General Hospital of Athens, Athens, Greece
| | | | | | - Michael Doulberis
- Department of Gastroenterology and Hepatology, University of Zurich, Zurich, Switzerland.,Department of Medicine, Second Medical Clinic, Aristotle University of Thessaloniki, Ippokration Hospital, Thessaloniki, Greece
| | - Nikolaos Kyriakos
- Department of Gastroenterology, 401 Army General Hospital of Athens, Athens, Greece
| | - Marios Giakoumis
- Department of Gastroenterology, 401 Army General Hospital of Athens, Athens, Greece
| | | | - Michail Galanopoulos
- Department of Gastroenterology, 401 Army General Hospital of Athens, Athens, Greece
| | - Panagiotis Katsinelos
- Department of Medicine, Second Medical Clinic, Aristotle University of Thessaloniki, Ippokration Hospital, Thessaloniki, Greece
| | - Theodore Rokkas
- Gastroenterological Clinic, Henry Dunant Hospital, Athens, Greece
| | - Jannis Kountouras
- Department of Medicine, Second Medical Clinic, Aristotle University of Thessaloniki, Ippokration Hospital, Thessaloniki, Greece
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23
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Augustin AD, Savio A, Nevel A, Ellis RJ, Weller C, Taylor D, Tucker RM, Ibrahim MAA, Bjarnason I, Dobbs SM, Dobbs RJ, Charlett A. Helicobacter suis Is Associated With Mortality in Parkinson's Disease. Front Med (Lausanne) 2019; 6:188. [PMID: 31555648 PMCID: PMC6724659 DOI: 10.3389/fmed.2019.00188] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2018] [Accepted: 08/05/2019] [Indexed: 01/13/2023] Open
Abstract
Helicobacter pylori has been implicated in the pathogenesis of Parkinson's disease (PD). Its eradication, in a randomized placebo-controlled trial, improved PD hypokinesia. Helicobacter species zoonosis might explain excess mortality from PD and non-Hodgkin lymphoma in livestock, but not arable, farmers. Indeed, Helicobacter is causally-associated with gastric lymphoma. We have previously shown that the relative-frequency, H. suis to H. pylori, was 10-times greater in 60 PD-patients than in 256 controls. We now go on to evaluate the pathological significance of H. suis, detected in gastric-biopsy DNA-extracts by ureA-based species-specific qPCR, validated by amplicon sequencing. The methodology had been cross-validated by a carR-based PCR. The pathological significance is put in context of H. pylori detection [urea-breath-test (UBT) with biopsy-culture, and, if negative, PCR], and the potential reservoir in pigs. Here, we explore, in these 60 PD-patients, associations of H. suis status with all-cause-mortality, and with orthostatic cardiovascular and blood profiling. H. suis had been detected in 19 of the 60 PD-patients on one or more occasion, only two (with co-existent H. pylori) being UBT positive. We found that the hazard-of-death (age-at-diagnosis- and gender-adjusted) was 12 (95% CI 1,103) times greater (likelihood-ratio test, P = 0.005) with H. suis-positivity (6/19) than with negativity (2/40: one lost to follow-up). UBT-values did not influence the hazard. H. suis-positivity was associated with lower standing mean-arterial-pressure [6 (1, 11) mmHg], H. pylori-positivity having no effect. The lower total lymphocyte count with H. pylori-positivity [-8 (-1, -14) %] was not seen with H. suis, where T-cell counts were higher [24 (2, 52) %]. Regarding the potential zoonotic reservoir in the UK, Helicobacter-like-organism frequency was determined in freshly-slaughtered pigs, nature ascertained by sequencing. Organisms immunostaining for Helicobacter, with corkscrew morphology typical of non-H. pylori Helicobacter, were seen in 47% of 111 pig-antra. We conclude that H. suis is associated with all-cause-mortality in PD and has a potential zoonotic reservoir.
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Affiliation(s)
- Aisha D. Augustin
- Pharmaceutical Sciences, King's College London, London, United Kingdom
- The Maudsley Hospital, London, United Kingdom
| | - Antonella Savio
- Pharmaceutical Sciences, King's College London, London, United Kingdom
- Histopathology, Royal Marsden Hospital, London, United Kingdom
| | - Amanda Nevel
- Royal Veterinary College, London, United Kingdom
| | | | - Clive Weller
- Pharmaceutical Sciences, King's College London, London, United Kingdom
| | - David Taylor
- Pharmaceutical Sciences, King's College London, London, United Kingdom
- The Maudsley Hospital, London, United Kingdom
| | - Rosalind M. Tucker
- Pharmaceutical Sciences, King's College London, London, United Kingdom
- The Maudsley Hospital, London, United Kingdom
| | | | - Ingvar Bjarnason
- Gastroenterology, King's College Hospital, London, United Kingdom
| | - Sylvia M. Dobbs
- Pharmaceutical Sciences, King's College London, London, United Kingdom
- The Maudsley Hospital, London, United Kingdom
- Gastroenterology, King's College Hospital, London, United Kingdom
| | - R. John Dobbs
- Pharmaceutical Sciences, King's College London, London, United Kingdom
- The Maudsley Hospital, London, United Kingdom
- Gastroenterology, King's College Hospital, London, United Kingdom
| | - André Charlett
- Pharmaceutical Sciences, King's College London, London, United Kingdom
- Statistics, Modelling and Economics, Centre for Infectious Disease Surveillance and Control, Public Health England, London, United Kingdom
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24
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Kato M, Ota H, Okuda M, Kikuchi S, Satoh K, Shimoyama T, Suzuki H, Handa O, Furuta T, Mabe K, Murakami K, Sugiyama T, Uemura N, Takahashi S. Guidelines for the management of Helicobacter pylori infection in Japan: 2016 Revised Edition. Helicobacter 2019; 24:e12597. [PMID: 31111585 DOI: 10.1111/hel.12597] [Citation(s) in RCA: 177] [Impact Index Per Article: 35.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/07/2019] [Revised: 04/08/2019] [Accepted: 04/14/2019] [Indexed: 12/14/2022]
Abstract
BACKGROUND Since "Helicobacter pylori (H. pylori) infection" was set as the indication in the Japanese Society for Helicobacter Research (JSHR) Guidelines 2009, eradication treatment for H. pylori gastritis is covered under insurance since 2013 in Japan, and the number of H. pylori eradication has rapidly increased. Under such circumstances, JSHR has made the third revision to the "Guidelines for diagnosis and treatment of H. pylori infection" for the first time in 7 years. METHODS The Guideline Committee held 10 meetings. Articles published between the establishment of the 2009 Guidelines and March 2016 were reviewed and classified according to the evidence level; the statements were revised on the basis of this review. After inviting public comments, the revised statements were finalized using the Delphi method. RESULTS There was no change in the basic policy that H. pylori infectious disease is an indication for eradication. Other diseases presumed to be associated with H. pylori infection were added as indications. Serum pepsinogen level, endoscopic examination, and X-ray examination were added to the diagnostic methods. The effects of 1-week triple therapy consisting of potassium-competitive acid blocker (P-CAB), amoxicillin, and clarithromycin have improved, and high eradication rates can also be expected with proton pump inhibitors (PPI) or P-CAB combined with amoxicillin and metronidazole. If the susceptibility test is not performed, the triple PPI or P-CAB/amoxicillin/metronidazole therapy should be chosen, because the PPI/amoxicillin/metronidazole combination demonstrated a significantly higher eradication rate than PPI/amoxicillin/clarithromycin. In the proposal for gastric cancer prevention, we divided gastric cancer prevention measures by age from adolescent to elderly, who are at an increased gastric cancer risk, and presented measures for gastric cancer prevention primarily based on H. pylori eradication. CONCLUSION We expect the revised guidelines to facilitate appropriate interventions for patients with H. pylori infection and accomplish its eradication and prevention of gastric cancer.
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Affiliation(s)
- Mototsugu Kato
- Department of Gastroenterology, National Hospital Organization Hakodate National Hospital, Hakodate, Hokkaido, Japan
| | - Hiroyoshi Ota
- Department of Clinical Laboratory Sciences, Shinshu University School of Medicine, Nagano, Hyogo, Japan
| | - Masumi Okuda
- Department of Pediatrics, Hyogo College of Medicine, Nishinomiya, Hyogo, Japan
| | - Shogo Kikuchi
- Department of Public Health, Aichi Medical University School of Medicine, Nagakute, Aichi, Japan
| | - Kiichi Satoh
- Department of Gastroenterology, International University of Health and Welfare Hospital, Nasushiobara, Tochigi, Japan
| | | | - Hidekazu Suzuki
- Fellowship Training Center, Medical Education Center, Keio University School of Medicine, Tokyo, Japan
| | - Osamu Handa
- Department of Molecular Gastroenterology and Hepatology, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Takahisa Furuta
- Center for Clinical Research, Hamamatsu University School of Medicine, Hamamatsu, Shizuoka, Japan
| | - Katsuhiro Mabe
- Department of Gastroenterology, National Hospital Organization Hakodate National Hospital, Hakodate, Hokkaido, Japan
| | - Kazunari Murakami
- Department of Gastroenterology, Faculty of Medicine, Oita University, Oita, Japan
| | - Toshiro Sugiyama
- Department of Cancer Prevention and Therapeutics, Graduate School of Medicine and Pharmaceutical Sciences, University of Toyama, Toyama, Japan
| | - Naomi Uemura
- Department of Gastroenterology, Kohnodai Hospital, National Center for Global Health and Medicine, Ichikawa, Japan
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25
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Roubaud-Baudron C, Mégraud F, Salles N, Dartigues JF, Letenneur L. Detecting both current and prior Helicobacter pylori
infection is important to assess its impact on dementia. Alzheimers Dement 2019; 15:721-722. [DOI: 10.1016/j.jalz.2018.12.020] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2018] [Revised: 12/20/2018] [Accepted: 12/29/2018] [Indexed: 12/16/2022]
Affiliation(s)
- Claire Roubaud-Baudron
- University of Bordeaux; INSERM UMR 1053 BaRITon; Bordeaux France
- CHU Bordeaux; Pôle de Gérontologie Clinique; Bordeaux France
| | - Francis Mégraud
- University of Bordeaux; INSERM UMR 1053 BaRITon; Bordeaux France
| | - Nathalie Salles
- University of Bordeaux; INSERM UMR 1053 BaRITon; Bordeaux France
- CHU Bordeaux; Pôle de Gérontologie Clinique; Bordeaux France
| | | | - Luc Letenneur
- University of Bordeaux; Population Health Research Center; INSERM UMR 1219; Bordeaux France
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26
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Gravina AG, Zagari RM, De Musis C, Romano L, Loguercio C, Romano M. Helicobacter pylori and extragastric diseases: A review. World J Gastroenterol 2018; 24:3204-3221. [PMID: PMID: 30090002 PMCID: PMC6079286 DOI: 10.3748/wjg.v24.i29.3204] [Citation(s) in RCA: 151] [Impact Index Per Article: 25.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/08/2018] [Revised: 05/19/2018] [Accepted: 06/27/2018] [Indexed: 02/06/2023] Open
Abstract
Helicobacter pylori (H. pylori) infection is very common and affects approximately half of the world population. It causes gastric diseases, but some authors have reported an association of H. pylori infection with other systemic manifestations beginning in 1994. The list of potential effects of H. pylori outside the stomach includes a number of extragastric manifestations and we focused on neurological, dermatological, hematologic, ocular, cardiovascular, metabolic, allergic, and hepatobiliary diseases. This review discusses these important reported manifestations that are not related to the gastrointestinal tract.
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Affiliation(s)
- Antonietta Gerarda Gravina
- Dipartimento di “Medicina di Precisione”, UOC Epatogastroenterologia, Università della Campania “Luigi Vanvitelli”, Napoli 80131, Italy
| | - Rocco Maurizio Zagari
- Dipertimento Di Scienze Mediche e Chirurgiche, Università di Bologna, Bologna 40138, Italy
| | - Cristiana De Musis
- Dipartimento di “Medicina di Precisione”, UOC Epatogastroenterologia, Università della Campania “Luigi Vanvitelli”, Napoli 80131, Italy
| | - Lorenzo Romano
- Dipartimento di “Medicina di Precisione”, UOC Epatogastroenterologia, Università della Campania “Luigi Vanvitelli”, Napoli 80131, Italy
| | - Carmelina Loguercio
- Dipartimento di “Medicina di Precisione”, UOC Epatogastroenterologia, Università della Campania “Luigi Vanvitelli”, Napoli 80131, Italy
| | - Marco Romano
- Dipartimento di “Medicina di Precisione”, UOC Epatogastroenterologia, Università della Campania “Luigi Vanvitelli”, Napoli 80131, Italy
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27
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Beydoun MA, Beydoun HA, Elbejjani M, Dore GA, Zonderman AB. Helicobacter pylori seropositivity and its association with incident all-cause and Alzheimer's disease dementia in large national surveys. Alzheimers Dement 2018; 14:1148-1158. [PMID: 30201100 DOI: 10.1016/j.jalz.2018.04.009] [Citation(s) in RCA: 44] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2017] [Revised: 01/23/2018] [Accepted: 04/09/2018] [Indexed: 02/08/2023]
Abstract
INTRODUCTION Infectious agents were recently implicated in Alzheimer's disease (AD) and etiology of other dementias, notably Helicobacter pylori. METHODS We tested associations of H. pylori seropositivity with incident all-cause and AD dementia and with AD-related mortality among US adults in a retrospective cohort study. Data from the National Health and Nutrition Surveys III, phase 1 (1988-1991) and 1999-2000 linked with Medicare and National Death Index registries, were used (baseline age ≥45 y, follow-up to 2013, Npooled = 5927). RESULTS A positive association between H. pylori seropositivity and AD mortality was found in men (hazard ratioadj, pooled = 4.33, 95% confidence interval: 1.51-12.41, P = .006), which was replicated for incident AD and all-cause dementia, with hazard ratioadj, pooled = 1.45 (95% confidence interval: 1.03-2.04, P = .035) and hazard ratioadj, III = 1.44 (95% confidence interval: 1.05-1.98, P = .022), respectively. These associations were also positive among higher socioeconomic status groups. DISCUSSION In sum, H. pylori seropositivity's direct association with AD mortality, all-cause dementia, and AD dementia was restricted to men and to higher socioeconomic status groups.
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Affiliation(s)
- May A Beydoun
- Laboratory of Epidemiology and Population Sciences, National Institute on Aging, NIA/NIH/IRP, Baltimore, MD, USA.
| | - Hind A Beydoun
- Department of Medicine, Johns Hopkins School of Medicine, Baltimore, MD, USA
| | - Martine Elbejjani
- Laboratory of Epidemiology and Population Sciences, National Institute on Aging, NIA/NIH/IRP, Baltimore, MD, USA
| | - Gregory A Dore
- Laboratory of Epidemiology and Population Sciences, National Institute on Aging, NIA/NIH/IRP, Baltimore, MD, USA
| | - Alan B Zonderman
- Laboratory of Epidemiology and Population Sciences, National Institute on Aging, NIA/NIH/IRP, Baltimore, MD, USA
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28
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Helicobacter pylori
and the risk of dementia: A population-based study. Alzheimers Dement 2018; 14:1377-1382. [DOI: 10.1016/j.jalz.2018.05.005] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2017] [Revised: 04/28/2018] [Accepted: 05/03/2018] [Indexed: 12/14/2022]
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29
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Harris SA, Harris EA. Molecular Mechanisms for Herpes Simplex Virus Type 1 Pathogenesis in Alzheimer's Disease. Front Aging Neurosci 2018; 10:48. [PMID: 29559905 PMCID: PMC5845560 DOI: 10.3389/fnagi.2018.00048] [Citation(s) in RCA: 99] [Impact Index Per Article: 16.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2018] [Accepted: 02/12/2018] [Indexed: 12/12/2022] Open
Abstract
This review focuses on research in the areas of epidemiology, neuropathology, molecular biology and genetics that implicates herpes simplex virus type 1 (HSV-1) as a causative agent in the pathogenesis of sporadic Alzheimer’s disease (AD). Molecular mechanisms whereby HSV-1 induces AD-related pathophysiology and pathology, including neuronal production and accumulation of amyloid beta (Aβ), hyperphosphorylation of tau proteins, dysregulation of calcium homeostasis, and impaired autophagy, are discussed. HSV-1 causes additional AD pathologies through mechanisms that promote neuroinflammation, oxidative stress, mitochondrial damage, synaptic dysfunction, and neuronal apoptosis. The AD susceptibility genes apolipoprotein E (APOE), phosphatidylinositol binding clathrin assembly protein (PICALM), complement receptor 1 (CR1) and clusterin (CLU) are involved in the HSV lifecycle. Polymorphisms in these genes may affect brain susceptibility to HSV-1 infection. APOE, for example, influences susceptibility to certain viral infections, HSV-1 viral load in the brain, and the innate immune response. The AD susceptibility gene cholesterol 25-hydroxylase (CH25H) is upregulated in the AD brain and is involved in the antiviral immune response. HSV-1 interacts with additional genes to affect cognition-related pathways and key enzymes involved in Aβ production, Aβ clearance, and hyperphosphorylation of tau proteins. Aβ itself functions as an antimicrobial peptide (AMP) against various pathogens including HSV-1. Evidence is presented supporting the hypothesis that Aβ is produced as an AMP in response to HSV-1 and other brain infections, leading to Aβ deposition and plaque formation in AD. Epidemiologic studies associating HSV-1 infection with AD and cognitive impairment are discussed. Studies are reviewed supporting subclinical chronic reactivation of latent HSV-1 in the brain as significant in the pathogenesis of AD. Finally, the rationale for and importance of clinical trials treating HSV-1-infected MCI and AD patients with antiviral medication is discussed.
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Affiliation(s)
- Steven A Harris
- St. Vincent Medical Group, Northside Internal Medicine, Indianapolis, IN, United States
| | - Elizabeth A Harris
- Department of Neurology, University of Chicago Medical Center, Chicago, IL, United States
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Doulberis M, Kotronis G, Thomann R, Polyzos SA, Boziki M, Gialamprinou D, Deretzi G, Katsinelos P, Kountouras J. Review: Impact of Helicobacter pylori on Alzheimer's disease: What do we know so far? Helicobacter 2018; 23. [PMID: 29181894 DOI: 10.1111/hel.12454] [Citation(s) in RCA: 63] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
BACKGROUND Helicobacter pylori has changed radically gastroenterologic world, offering a new concept in patients' management. Over time, more medical data gave rise to diverse distant, extragastric manifestations and interactions of the "new" discovered bacterium. Special interest appeared within the field of neurodegenerative diseases and particularly Alzheimer's disease, as the latter and Helicobacter pylori infection are associated with a large public health burden and Alzheimer's disease ranks as the leading cause of disability. However, the relationship between Helicobacter pylori infection and Alzheimer's disease remains uncertain. METHODS We performed a narrative review regarding a possible connection between Helicobacter pylori and Alzheimer's disease. All accessible relevant (pre)clinical studies written in English were included. Both affected pathologies were briefly analyzed, and relevant studies are discussed, trying to focus on the possible pathogenetic role of this bacterium in Alzheimer's disease. RESULTS Data stemming from both epidemiologic studies and animal experiments seem to be rather encouraging, tending to confirm the hypothesis that Helicobacter pylori infection might influence the course of Alzheimer's disease pleiotropically. Possible main mechanisms may include the bacterium's access to the brain via the oral-nasal-olfactory pathway or by circulating monocytes (infected with Helicobacter pylori due to defective autophagy) through disrupted blood-brain barrier, thereby possibly triggering neurodegeneration. CONCLUSIONS Current data suggest that Helicobacter pylori infection might influence the pathophysiology of Alzheimer's disease. However, further large-scale randomized controlled trials are mandatory to clarify a possible favorable effect of Helicobacter pylori eradication on Alzheimer's disease pathophysiology, before the recommendation of short-term and cost-effective therapeutic regimens against Helicobacter pylori-related Alzheimer's disease.
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Affiliation(s)
- Michael Doulberis
- Department of Internal Medicine, Bürgerspital Hospital, Solothurn, Switzerland
| | - Georgios Kotronis
- Department of Internal Medicine, Agios Pavlos General Hospital, Thessaloniki, Macedonia, Greece
| | - Robert Thomann
- Department of Internal Medicine, Bürgerspital Hospital, Solothurn, Switzerland
| | - Stergios A Polyzos
- Department of Internal Medicine, Ippokration Hospital, Second Medical Clinic, Aristotle University of Thessaloniki, Thessaloniki, Macedonia, Greece
| | - Marina Boziki
- Department of Internal Medicine, Ippokration Hospital, Second Medical Clinic, Aristotle University of Thessaloniki, Thessaloniki, Macedonia, Greece
| | - Dimitra Gialamprinou
- Department of Pediatrics, Papageorgiou General Hospital, Aristotle University of Thessaloniki, Thessaloniki, Macedonia, Greece
| | - Georgia Deretzi
- Department of Neurology, Papageorgiou General Hospital, Multiple Sclerosis Unit, Aristotle University of Thessaloniki, Thessaloniki, Macedonia, Greece
| | - Panagiotis Katsinelos
- Department of Internal Medicine, Ippokration Hospital, Second Medical Clinic, Aristotle University of Thessaloniki, Thessaloniki, Macedonia, Greece
| | - Jannis Kountouras
- Department of Internal Medicine, Ippokration Hospital, Second Medical Clinic, Aristotle University of Thessaloniki, Thessaloniki, Macedonia, Greece
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Berrett AN, Gale SD, Erickson LD, Brown BL, Hedges DW. Helicobacter pylori moderates the association between 5-MTHF concentration and cognitive function in older adults. PLoS One 2018; 13:e0190475. [PMID: 29364915 PMCID: PMC5783346 DOI: 10.1371/journal.pone.0190475] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2016] [Accepted: 12/11/2017] [Indexed: 01/02/2023] Open
Abstract
Objective To explore potential interactions between folate-cycle factors and Helicobacter pylori seropositivity in the prediction of cognitive function. Methods We used data obtained from the 1999–2000 continuous National Health and Nutrition Examination Survey produced by the United States’ Centers for Disease Control and Prevention. Using Ordinary Least Squares regression, we tested for associations between multiple folate-cycle factors, Helicobacter pylori seropositivity, and cognitive function assessed by the digit symbol coding subtest of the Wechsler Adult Intelligence Scale-III. We then tested for interactions between each of the folate-cycle factors and Helicobacter pylori in the prediction of cognitive function. Results Although Helicobacter pylori seropositivity, 5-methyltetrahydrofolate, vitamin B-12, and homocysteine were not associated with performance on the digit symbol coding task, Helicobacter pylori seropositivity interacted with 5-methyltetrahydrofolate concentration to predict performance on the digit symbol coding task. The Helicobacter pylori seropositive group performed worse on the digit symbol coding task as 5-methyltetrahydrofolate concentration decreased. Conclusion The interaction between Helicobacter pylori seropositivity and reduced folate-cycle factor 5-methyltetrahydrofolate might impair aspects of cognitive function.
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Affiliation(s)
- Andrew N Berrett
- Department of Psychology, Brigham Young University, Provo, Utah, United States of America
| | - Shawn D Gale
- Department of Psychology, Brigham Young University, Provo, Utah, United States of America
- The Neuroscience Center, Brigham Young University, Provo, Utah, United States of America
| | - Lance D Erickson
- Department of Sociology, Brigham Young University, Provo, Utah, United States of America
| | - Bruce L Brown
- Department of Psychology, Brigham Young University, Provo, Utah, United States of America
| | - Dawson W Hedges
- Department of Psychology, Brigham Young University, Provo, Utah, United States of America
- The Neuroscience Center, Brigham Young University, Provo, Utah, United States of America
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Zhou H, Guo Y, Li X, Liuyang ZY, Shentu YP, Jing XP, Liang JW, Zhou XW, Wang XC, Wang JZ, Zeng J, Liu R. Long-term Helicobacter pylori infection does not induce tauopathy and memory impairment in SD rats. Curr Med Sci 2017; 37:823-827. [PMID: 29270738 DOI: 10.1007/s11596-017-1813-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2017] [Revised: 09/06/2017] [Indexed: 01/06/2023]
Abstract
Helicobacter pylori (H.pylori) infection is a recognized risk factor of dementia, while its role and mechanism in Alzheimer disease (AD) remained unclarified. Our previous study has identified that injection of soluble H.pylori filtrate could induce AD-like pathologic changes and cognitive impairment in SD rats. In the present study, we further explored the effect of long-term stomach colonization of H.pylori bacteria on the brains of SD rats. The results showed that H.pylori bacteria gavage induced an efficient colonization of H.pylori in the stomach after four weeks. However, there was no significant change of tau phosphorylation at Thr205 (pT205), Thr231 (pT231), Ser396 (pS396) and Ser404 (pS404) sites in the hippocampus and cerebral cortex. The H.pylori-infected rats also showed no cognitive impairment. These observations may result from inefficient release of bacterial pathogenic factors or the overall lack of host inflammatory responses. We conclude that SD rat with long-term H.pylori colonization in the stomach is not a suitable animal model for exploring the effects of H.pylori infection on brain function in human beings; administration of bacterial filtrates may better reveal the systemic pathologic changes induced by bacterial infection in animals which show a negative host response to bacterial colonization.
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Affiliation(s)
- Huan Zhou
- Department of Pathophysiology, Key Laboratory of Ministry of Education for Neurological Disorders, School of Basic Medicine, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China
| | - Ying Guo
- Department of Clinic Laboratory, Pu Ai Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430033, China
| | - Xing Li
- Department of Pathophysiology, Key Laboratory of Ministry of Education for Neurological Disorders, School of Basic Medicine, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China
| | - Zheng-Yu Liuyang
- Department of Pathophysiology, Key Laboratory of Ministry of Education for Neurological Disorders, School of Basic Medicine, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China
| | - Yang-Ping Shentu
- Department of Pathophysiology, Key Laboratory of Ministry of Education for Neurological Disorders, School of Basic Medicine, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China
| | - Xiao-Peng Jing
- Department of Clinic Laboratory, Pu Ai Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430033, China
| | - Jia-Wei Liang
- Department of Pathophysiology, Key Laboratory of Ministry of Education for Neurological Disorders, School of Basic Medicine, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China
| | - Xin-Wen Zhou
- Department of Pathophysiology, Key Laboratory of Ministry of Education for Neurological Disorders, School of Basic Medicine, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China
| | - Xiao-Chuan Wang
- Department of Pathophysiology, Key Laboratory of Ministry of Education for Neurological Disorders, School of Basic Medicine, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China
| | - Jian-Zhi Wang
- Department of Pathophysiology, Key Laboratory of Ministry of Education for Neurological Disorders, School of Basic Medicine, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China
| | - Ji Zeng
- Department of Clinic Laboratory, Pu Ai Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430033, China.
| | - Rong Liu
- Department of Pathophysiology, Key Laboratory of Ministry of Education for Neurological Disorders, School of Basic Medicine, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China. .,The Institute for Brain Research, Collaborative Innovation Center for Brain Science, Huazhong University of Science and Technology, Wuhan, 430030, China.
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McManus RM, Heneka MT. Role of neuroinflammation in neurodegeneration: new insights. ALZHEIMERS RESEARCH & THERAPY 2017; 9:14. [PMID: 28259169 PMCID: PMC5336609 DOI: 10.1186/s13195-017-0241-2] [Citation(s) in RCA: 171] [Impact Index Per Article: 24.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Previously, the contribution of peripheral infection to cognitive decline was largely overlooked however, the past 15 years have established a key role for infectious pathogens in the progression of age-related neurodegeneration. It is now accepted that the immune privilege of the brain is not absolute, and that cells of the central nervous system are sensitive to both the inflammatory events occurring in the periphery and to the infiltration of peripheral immune cells. This is particularly relevant for the progression of Alzheimer’s disease, in which it has been demonstrated that patients are more vulnerable to infection-related cognitive changes. This can occur from typical infectious challenges such as respiratory tract infections, although a number of specific viral, bacterial, and fungal pathogens have also been associated with the development of the disease. To date, it is not clear whether these microorganisms are directly related to Alzheimer’s disease progression or if they are opportune pathogens that easily colonize those with dementia and exacerbate the ongoing inflammation observed in these individuals. This review will discuss the impact of each of these challenges, and examine the changes known to occur with age in the peripheral immune system, which may contribute to the age-related vulnerability to infection-induced cognitive decline.
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Affiliation(s)
- Róisín M McManus
- German Center for Neurodegenerative Diseases (DZNE), Sigmund Freud Str. 27, 53127, Bonn, Germany
| | - Michael T Heneka
- German Center for Neurodegenerative Diseases (DZNE), Sigmund Freud Str. 27, 53127, Bonn, Germany. .,Department of Neurodegenerative Disease and Gerontopsychiatry/Neurology, University of Bonn Medical Center, Sigmund-Freud Str. 25, 53127, Bonn, Germany.
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The Association Between Helicobacter pylori Infection and Cognitive Disorder in Iranian Elderly Population. ARCHIVES OF CLINICAL INFECTIOUS DISEASES 2016. [DOI: 10.5812/archcid.38193] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Harris SA, Harris EA. Herpes Simplex Virus Type 1 and Other Pathogens are Key Causative Factors in Sporadic Alzheimer's Disease. J Alzheimers Dis 2016; 48:319-53. [PMID: 26401998 PMCID: PMC4923765 DOI: 10.3233/jad-142853] [Citation(s) in RCA: 162] [Impact Index Per Article: 20.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
This review focuses on research in epidemiology, neuropathology, molecular biology, and genetics regarding the hypothesis that pathogens interact with susceptibility genes and are causative in sporadic Alzheimer's disease (AD). Sporadic AD is a complex multifactorial neurodegenerative disease with evidence indicating coexisting multi-pathogen and inflammatory etiologies. There are significant associations between AD and various pathogens, including Herpes simplex virus type 1 (HSV-1), Cytomegalovirus, and other Herpesviridae, Chlamydophila pneumoniae, spirochetes, Helicobacter pylori, and various periodontal pathogens. These pathogens are able to evade destruction by the host immune system, leading to persistent infection. Bacterial and viral DNA and RNA and bacterial ligands increase the expression of pro-inflammatory molecules and activate the innate and adaptive immune systems. Evidence demonstrates that pathogens directly and indirectly induce AD pathology, including amyloid-β (Aβ) accumulation, phosphorylation of tau protein, neuronal injury, and apoptosis. Chronic brain infection with HSV-1, Chlamydophila pneumoniae, and spirochetes results in complex processes that interact to cause a vicious cycle of uncontrolled neuroinflammation and neurodegeneration. Infections such as Cytomegalovirus, Helicobacter pylori, and periodontal pathogens induce production of systemic pro-inflammatory cytokines that may cross the blood-brain barrier to promote neurodegeneration. Pathogen-induced inflammation and central nervous system accumulation of Aβ damages the blood-brain barrier, which contributes to the pathophysiology of AD. Apolipoprotein E4 (ApoE4) enhances brain infiltration by pathogens including HSV-1 and Chlamydophila pneumoniae. ApoE4 is also associated with an increased pro-inflammatory response by the immune system. Potential antimicrobial treatments for AD are discussed, including the rationale for antiviral and antibiotic clinical trials.
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Affiliation(s)
- Steven A Harris
- St. Vincent Medical Group, Northside Internal Medicine, Indianapolis, IN, USA
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Shindler-Itskovitch T, Ravona-Springer R, Leibovitz A, Muhsen K. A Systematic Review and Meta-Analysis of the Association between Helicobacterpylori Infection and Dementia. J Alzheimers Dis 2016; 52:1431-42. [PMID: 27079725 DOI: 10.3233/jad-160132] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
BACKGROUND A positive association between Helicobacter pylori infection and dementia has been reported, yet findings are inconsistent. OBJECTIVE To examine the association between H. pylori infection and dementia. METHODS A literature search was performed using the databases OVID-Medline, Institute of Scientific Information Web of Science, and EMBASE. The meta-analysis was conducted using the random effects model. The primary analysis included studies in which the exposure variable was presence of H. pylori infection (yes versus no) and the outcome was incident dementia (yes versus no), which was pre-selected as the end-result of gradual cognitive decline overtime. Publication bias was explored using funnel plot and the Egger regression intercept. RESULTS A total of 260 records were identified; 13 addressed cognition and/or dementia in relation to H. pylori infection, of which only seven were included in the meta-analysis. The primary analysis showed a significant positive association between H. pylori infection and dementia; pooled odds ratio 1.71 (95% CI 1.17-2.49) (pv = 0.01). No significant evidence of publication bias was found. CONCLUSIONS H. pylori may play a role in the etiology of dementia. Identification of the biological mechanisms of such association is needed, as well as assessment of the impact of H. pylori therapy on the risk and progression of dementia.
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Affiliation(s)
- Tali Shindler-Itskovitch
- Department of Epidemiology and Preventive Medicine, School of Public Health, Tel Aviv University, Ramat Aviv, Tel Aviv, Israel
- Sackler Faculty of Medicine, Tel Aviv University, Ramat Aviv, Tel Aviv, Israel
| | - Ramit Ravona-Springer
- Sackler Faculty of Medicine, Tel Aviv University, Ramat Aviv, Tel Aviv, Israel
- Memory Clinic, Sheba Medical Center, Tel Hashomer, Ramat Gan, Israel
| | - Arthur Leibovitz
- Department of Epidemiology and Preventive Medicine, School of Public Health, Tel Aviv University, Ramat Aviv, Tel Aviv, Israel
- Geriatric Medical Division, Meuchedet Health Maintenance Organization, Israel
| | - Khitam Muhsen
- Department of Epidemiology and Preventive Medicine, School of Public Health, Tel Aviv University, Ramat Aviv, Tel Aviv, Israel
- Sackler Faculty of Medicine, Tel Aviv University, Ramat Aviv, Tel Aviv, Israel
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Wright CB, Gardener H, Dong C, Yoshita M, DeCarli C, Sacco RL, Stern Y, Elkind MS. Infectious Burden and Cognitive Decline in the Northern Manhattan Study. J Am Geriatr Soc 2015; 63:1540-5. [PMID: 26289683 PMCID: PMC4878014 DOI: 10.1111/jgs.13557] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
OBJECTIVES To determine whether infectious burden (IB) is associated with worse performance and decline on a battery of neuropsychological tests. DESIGN Prospective cohort study (Northern Manhattan Study (NOMAS)). SETTING Community. PARTICIPANTS A subsample of 588 stroke-free NOMAS participants with IB and cognitive data (mean age 71 ± 8, 62% female, 14% white, 16% black, 70% Hispanic) and 419 with repeat cognitive testing. MEASUREMENTS Samples used for IB data were collected at baseline. Two waves of neurocognitive assessments occurred during follow-up. Participants underwent a neuropsychological battery and had repeated testing (mean time span 6 ± 2 years). Using factor analysis-derived domain-specific Z scores for language, memory, executive function, and processing speed, associations between a quantitative stroke risk-weighted IB index (IBI), based on five common infections (Chlamydia pneumoniae, Helicobacter pylori, cytomegalovirus, herpes simplex viruses 1 and 2), and cognitive performance and decline in each domain was examined. RESULTS Adjusting for demographic characteristics, socioeconomic status, crystallized cognitive abilities, and vascular risk factors, the IBI was inversely associated with executive function at baseline (beta = -0.10, P = .01) but not with baseline language, memory, or processing speed performance in adjusted analyses. The IBI was associated with cognitive decline in the memory domain, adjusting for demographic and vascular risk factors (P = .02). CONCLUSION A quantitative stroke risk-weighted measure of IB explained variability in baseline executive function performance and associated with decline in memory. Past exposure to common infections may contribute to vascular cognitive impairment and warrants further study.
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Affiliation(s)
- Clinton B. Wright
- Evelyn F. McKnight Brain Institute University of Miami, Miami, Florida
- Department of Neurology, University of Miami, Miami, Florida
- Department of Epidemiology and Public Health, Leonard M. Miller School of Medicine, University of Miami, Miami, Florida
- Department of Neuroscience Program, University of Miami, Miami, Florida
| | - Hannah Gardener
- Evelyn F. McKnight Brain Institute University of Miami, Miami, Florida
- Department of Neurology, University of Miami, Miami, Florida
| | - Chuanhui Dong
- Evelyn F. McKnight Brain Institute University of Miami, Miami, Florida
- Department of Neurology, University of Miami, Miami, Florida
| | - Mitsuhiro Yoshita
- Department of Neuroscience Program, University of Miami, Miami, Florida
| | - Charles DeCarli
- Department of Neurology, University of California at Davis Health System, Sacramento, California
| | - Ralph L. Sacco
- Evelyn F. McKnight Brain Institute University of Miami, Miami, Florida
- Department of Neurology, University of Miami, Miami, Florida
- Department of Epidemiology and Public Health, Leonard M. Miller School of Medicine, University of Miami, Miami, Florida
| | - Yaakov Stern
- Cognitive Neuroscience Division, Columbia University College of Physicians and Surgeons, New York, New York
- Taub Institute for Research in Alzheimer’s Disease and the Aging Brain, Columbia University College of Physicians and Surgeons, New York, New York
| | - Mitchell S.V. Elkind
- Department of Neurology, Columbia University College of Physicians and Surgeons, New York, New York
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Vale FF, Oleastro M. Overview of the phytomedicine approaches against Helicobacter pylori. World J Gastroenterol 2014; 20:5594-5609. [PMID: 24914319 PMCID: PMC4024768 DOI: 10.3748/wjg.v20.i19.5594] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/28/2013] [Revised: 12/18/2013] [Accepted: 03/06/2014] [Indexed: 02/06/2023] Open
Abstract
Helicobacter pylori (H. pylori) successfully colonizes the human stomach of the majority of the human population. This infection always causes chronic gastritis, but may evolve to serious outcomes, such as peptic ulcer, gastric carcinoma or mucosa-associated lymphoid tissue lymphoma. H. pylori first line therapy recommended by the Maastricht-4 Consensus Report comprises the use of two antibiotics and a proton-pomp inhibitor, but in some regions failure associated with this treatment is already undesirable high. Indeed, treatment failure is one of the major problems associated with H. pylori infection and is mainly associated with bacterial antibiotic resistance. In order to counteract this situation, some effort has been allocated during the last years in the investigation of therapeutic alternatives beyond antibiotics. These include vaccines, probiotics, photodynamic inactivation and phage therapy, which are briefly revisited in this review. A particular focus on phytomedicine, also described as herbal therapy and botanical therapy, which consists in the use of plant extracts for medicinal purposes, is specifically addressed, namely considering its history, category of performed studies, tested compounds, active principle and mode of action. The herbs already experienced are highly diverse and usually selected from products with a long history of employment against diseases associated with H. pylori infection from each country own folk medicine. The studies demonstrated that many phytomedicine products have an anti-H. pylori activity and gastroprotective action. Although the mechanism of action is far from being completely understood, current knowledge correlates the beneficial action of herbs with inhibition of essential H. pylori enzymes, modulation of the host immune system and with attenuation of inflammation.
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Budzyński J, Kłopocka M. Brain-gut axis in the pathogenesis of Helicobacter pylori infection. World J Gastroenterol 2014; 20:5212-5225. [PMID: 24833851 PMCID: PMC4017036 DOI: 10.3748/wjg.v20.i18.5212] [Citation(s) in RCA: 72] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/25/2013] [Revised: 01/11/2014] [Accepted: 01/20/2014] [Indexed: 02/06/2023] Open
Abstract
Helicobacter pylori (H. pylori) infection is the main pathogenic factor for upper digestive tract organic diseases. In addition to direct cytotoxic and proinflammatory effects, H. pylori infection may also induce abnormalities indirectly by affecting the brain-gut axis, similar to other microorganisms present in the alimentary tract. The brain-gut axis integrates the central, peripheral, enteric and autonomic nervous systems, as well as the endocrine and immunological systems, with gastrointestinal functions and environmental stimuli, including gastric and intestinal microbiota. The bidirectional relationship between H. pylori infection and the brain-gut axis influences both the contagion process and the host’s neuroendocrine-immunological reaction to it, resulting in alterations in cognitive functions, food intake and appetite, immunological response, and modification of symptom sensitivity thresholds. Furthermore, disturbances in the upper and lower digestive tract permeability, motility and secretion can occur, mainly as a form of irritable bowel syndrome. Many of these abnormalities disappear following H. pylori eradication. H. pylori may have direct neurotoxic effects that lead to alteration of the brain-gut axis through the activation of neurogenic inflammatory processes, or by microelement deficiency secondary to functional and morphological changes in the digestive tract. In digestive tissue, H. pylori can alter signaling in the brain-gut axis by mast cells, the main brain-gut axis effector, as H. pylori infection is associated with decreased mast cell infiltration in the digestive tract. Nevertheless, unequivocal data concerning the direct and immediate effect of H. pylori infection on the brain-gut axis are still lacking. Therefore, further studies evaluating the clinical importance of these host-bacteria interactions will improve our understanding of H. pylori infection pathophysiology and suggest new therapeutic approaches.
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Abstract
The discovery of Helicobacter pylori infection in the stomach could be considered as one of the most important events of modern gastroenterology. Understanding of the natural history of many disorders of the upper gastrointestinal tract, including chronic gastritis, peptic ulcer disease, gastric cancer and MALT lymphoma, was altered by this discovery. Interestingly, epidemiological studies have also revealed a correlation between H. pylori infection and some diseases localized outside the stomach, especially those characterized by persistent and low-grade systemic inflammation. Of note, H. pylori has an important role in iron deficiency anaemia, idiopathic thrombocytopenic purpura and vitamin B12 deficiency. Moreover, the association of this bacterial pathogen with many other diseases, including hepatobiliary, pancreatic, cardiovascular and neurodegenerative disorders is currently under investigation. In this Review, we summarize the results of the most important studies performed to date surrounding the association of H. pylori infection with extragastric diseases, as well as the strength of the evidence. We also provide information concerning bacterial-host interactions and the mechanisms implicated in the pathogenesis of each of these extragastric diseases.
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Lathe R, Sapronova A, Kotelevtsev Y. Atherosclerosis and Alzheimer--diseases with a common cause? Inflammation, oxysterols, vasculature. BMC Geriatr 2014; 14:36. [PMID: 24656052 PMCID: PMC3994432 DOI: 10.1186/1471-2318-14-36] [Citation(s) in RCA: 87] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2013] [Accepted: 02/26/2014] [Indexed: 02/08/2023] Open
Abstract
BACKGROUND Aging is accompanied by increasing vulnerability to pathologies such as atherosclerosis (ATH) and Alzheimer disease (AD). Are these different pathologies, or different presentations with a similar underlying pathoetiology? DISCUSSION Both ATH and AD involve inflammation, macrophage infiltration, and occlusion of the vasculature. Allelic variants in common genes including APOE predispose to both diseases. In both there is strong evidence of disease association with viral and bacterial pathogens including herpes simplex and Chlamydophila. Furthermore, ablation of components of the immune system (or of bone marrow-derived macrophages alone) in animal models restricts disease development in both cases, arguing that both are accentuated by inflammatory/immune pathways. We discuss that amyloid β, a distinguishing feature of AD, also plays a key role in ATH. Several drugs, at least in mouse models, are effective in preventing the development of both ATH and AD. Given similar age-dependence, genetic underpinnings, involvement of the vasculature, association with infection, Aβ involvement, the central role of macrophages, and drug overlap, we conclude that the two conditions reflect different manifestations of a common pathoetiology. MECHANISM Infection and inflammation selectively induce the expression of cholesterol 25-hydroxylase (CH25H). Acutely, the production of 'immunosterol' 25-hydroxycholesterol (25OHC) defends against enveloped viruses. We present evidence that chronic macrophage CH25H upregulation leads to catalyzed esterification of sterols via 25OHC-driven allosteric activation of ACAT (acyl-CoA cholesterol acyltransferase/SOAT), intracellular accumulation of cholesteryl esters and lipid droplets, vascular occlusion, and overt disease. SUMMARY We postulate that AD and ATH are both caused by chronic immunologic challenge that induces CH25H expression and protection against particular infectious agents, but at the expense of longer-term pathology.
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Affiliation(s)
- Richard Lathe
- State University of Pushchino, Prospekt Nauki, Pushchino 142290, Moscow Region, Russia
- Pushchino Branch of the Institute of Bioorganic Chemistry, Russian Academy of Sciences, Pushchino 142290 Moscow Region, Russia
- Pieta Research, PO Box 27069, Edinburgh EH10 5YW, UK
| | - Alexandra Sapronova
- State University of Pushchino, Prospekt Nauki, Pushchino 142290, Moscow Region, Russia
- Pushchino Branch of the Institute of Bioorganic Chemistry, Russian Academy of Sciences, Pushchino 142290 Moscow Region, Russia
- Optical Research Group, Laboratory of Evolutionary Biophysics of Development, Institute of Developmental Biology of the Russian Academy of Sciences, Moscow, Russia
| | - Yuri Kotelevtsev
- State University of Pushchino, Prospekt Nauki, Pushchino 142290, Moscow Region, Russia
- Pushchino Branch of the Institute of Bioorganic Chemistry, Russian Academy of Sciences, Pushchino 142290 Moscow Region, Russia
- Biomedical Centre for Research Education and Innovation (CREI), Skolkovo Institute of Science and Technology, Skolkovo 143025, Russia
- Centre for Cardiovascular Science, Queens Medical Research Institute, University of Edinburgh, Little France, Edinburgh EH16 4TJ, UK
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Katan M, Elkind MSV. Infectious burden and its role in cerebrovascular disease and cognitive impairment. Future Virol 2013. [DOI: 10.2217/fvl.13.74] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Affiliation(s)
- Mira Katan
- Neurological Institute, Columbia University, 710 West 168th Street, Box 182, New York, NY 10032, USA
- Department of Neurology, College of Physicians & Surgeons, Columbia University, New York, NY, USA
- Department of Neurology, University Hospital of Zurich, Zurich, Switzerland
| | - Mitchell SV Elkind
- Department of Epidemiology, Mailman School of Public Health, Columbia University, New York, NY, USA
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Roubaud Baudron C, Franceschi F, Salles N, Gasbarrini A. Extragastric diseases and Helicobacter pylori. Helicobacter 2013; 18 Suppl 1:44-51. [PMID: 24011245 DOI: 10.1111/hel.12077] [Citation(s) in RCA: 62] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
In the last year, several diseases from outside of the gastrointestinal tract have been associated with Helicobacter pylori infection. Indeed, this bacterium produces a low-grade inflammatory state, induces molecular mimicry mechanisms, and interferes with the absorbance of nutrients and drugs possibly influencing the occurrence or the evolution of many diseases. In addition to its role in some hematologic conditions, such as immune thrombocytopenic purpura, idiopathic sideropenic anemia, and vitamin B12 deficiency, which were included in the current guidelines, several other conditions such as cardiovascular diseases, diabetes mellitus, hepatobiliary diseases, and neurologic disorders have also shown promising results.
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Affiliation(s)
- Claire Roubaud Baudron
- Université de Bordeaux, Laboratoire de Bactériologie, Bordeaux, France; Pôle de Gérontologie Clinique, Bordeaux, France; INSERM U853, Bordeaux, France
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Antibody levels to persistent pathogens and incident stroke in Mexican Americans. PLoS One 2013; 8:e65959. [PMID: 23799066 PMCID: PMC3682951 DOI: 10.1371/journal.pone.0065959] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2012] [Accepted: 04/30/2013] [Indexed: 02/07/2023] Open
Abstract
Background Persistent pathogens have been proposed as risk factors for stroke; however, the evidence remains inconclusive. Mexican Americans have an increased risk of stroke especially at younger ages, as well as a higher prevalence of infections caused by several persistent pathogens. Methodology/Principal Findings Using data from the Sacramento Area Latino Study on Aging (n = 1621), the authors used discrete-time regression to examine associations between stroke risk and (1) immunoglobulin G antibody levels to Helicobacter pylori (H. pylori), Cytomegalovirus, Varicella Zoster Virus, Toxoplasma gondii and Herpes simplex virus 1, and (2) concurrent exposure to several pathogens (pathogen burden), defined as: (a) summed sero-positivity, (b) number of pathogens eliciting high antibody levels, and (c) average antibody level. Models were adjusted for socio-demographics and stroke risk factors. Antibody levels to H. pylori predicted incident stroke in fully adjusted models (Odds Ratio: 1.58; 95% Confidence Interval: 1.09, 2.28). No significant associations were found between stroke risk and antibody levels to the other four pathogens. No associations were found for pathogen burden and incident stroke in fully adjusted models. Conclusions/Significance Our results suggest that exposure to H. pylori may be a stroke risk factor in Mexican Americans and may contribute to ethnic differences in stroke risk given the increased prevalence of exposure to H. pylori in this population. Future studies are needed to confirm this association.
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Bested AC, Logan AC, Selhub EM. Intestinal microbiota, probiotics and mental health: from Metchnikoff to modern advances: Part I - autointoxication revisited. Gut Pathog 2013; 5:5. [PMID: 23506618 PMCID: PMC3607857 DOI: 10.1186/1757-4749-5-5] [Citation(s) in RCA: 75] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/07/2013] [Accepted: 03/10/2013] [Indexed: 01/16/2023] Open
Abstract
Mental health disorders, depression in particular, have been described as a global epidemic. Research suggests that a variety of lifestyle and environmental changes may be driving at least some portion of the increased prevalence. One area of flourishing research involves the relationship between the intestinal microbiota (as well as the related functional integrity of the gastrointestinal tract) and mental health. In order to appreciate the recent scientific gains in this area, and its potential future directions, it is critical to review the history of the topic. Probiotic administration (e.g. Lactobacillus) and fecal microbiota transfer for conditions associated with depression and anxiety is not a new concept. Here, in the first of a 3-part series, we begin by reviewing the origins of the contemporary research, providing a critical appraisal of what has become a revisionist history of the controversial term 'autointoxication'. We argue that legitimate interests in the gut-brain-microbiota connection were obscured for decades by its association with a narrow historical legacy. Historical perspectives provide a very meaningful context to the current state of the contemporary research as outlined in parts II and III.
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Affiliation(s)
- Alison C Bested
- Complex Chronic Diseases Program, BC Women's Hospital and Health Centre, B223A-4500 Oak Street, Vancouver, BC V6H 3N1, Canada
| | - Alan C Logan
- CAMNR, 775 Blithedale Avenue, Suite 364, Mill Valley, CA 94941, USA
| | - Eva M Selhub
- Harvard Medical School and Massachusetts General Hospital, 40 Crescent St., Suite 201, Waltham, MA 02453, USA
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