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Zhang Z, Wu X, Zhou M, Qi J, Zhang R, Li X, Wang C, Ruan C, Han Y. Plasma Metabolomics Identifies the Dysregulated Metabolic Profile of Primary Immune Thrombocytopenia (ITP) Based on GC-MS. Front Pharmacol 2022; 13:845275. [PMID: 35685646 PMCID: PMC9170960 DOI: 10.3389/fphar.2022.845275] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2021] [Accepted: 05/06/2022] [Indexed: 12/04/2022] Open
Abstract
ITP is a common autoimmune bleeding disorder with elusive pathogenesis. Our study was implemented to profile the plasma metabolic alterations of patients diagnosed with ITP, aiming at exploring the potential novel biomarkers and partial mechanism of ITP. The metabolomic analysis of plasma samples was conducted using GC-MS on 98 ITP patients and 30 healthy controls (HCs). Age and gender matched samples were selected to enter the training set or test set respectively. OPLS-DA, t-test with FDR correction and ROC analyses were employed to screen out and evaluate the differential metabolites. Possible pathways were enriched based on metabolomics pathway analysis (MetPA). A total of 85 metabolites were investigated in our study and 17 differential metabolites with diagnostic potential were identified between ITP patients and HCs. MetPA showed that the metabolic disorders of ITP patients were mainly related to phenylalanine, tyrosine and tryptophan biosynthesis, phenylalanine metabolism and glyoxylate and dicarboxylate metabolism. Additionally, we discriminated 6 differential metabolites and 5 enriched pathways in predicting the resistance to glucocorticoids in chronic ITP patients. The distinct metabolites discovered in our study could become novel biomarkers for the auxiliary diagnosis and prognosis prediction of ITP. Besides, the dysregulated pathways might contribute to the development of ITP.
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Affiliation(s)
- Ziyan Zhang
- National Clinical Research Center for Hematologic Diseases, Jiangsu Institute of Hematology, The First Affiliated Hospital of Soochow University, Suzhou, China
- Institute of Blood and Marrow Transplantation, Collaborative Innovation Center of Hematology, Soochow University, Suzhou, China
| | - Xiaojin Wu
- National Clinical Research Center for Hematologic Diseases, Jiangsu Institute of Hematology, The First Affiliated Hospital of Soochow University, Suzhou, China
- Institute of Blood and Marrow Transplantation, Collaborative Innovation Center of Hematology, Soochow University, Suzhou, China
- Key Laboratory of Thrombosis and Hemostasis of Ministry of Health, Suzhou, China
| | - Meng Zhou
- National Clinical Research Center for Hematologic Diseases, Jiangsu Institute of Hematology, The First Affiliated Hospital of Soochow University, Suzhou, China
- Institute of Blood and Marrow Transplantation, Collaborative Innovation Center of Hematology, Soochow University, Suzhou, China
| | - Jiaqian Qi
- National Clinical Research Center for Hematologic Diseases, Jiangsu Institute of Hematology, The First Affiliated Hospital of Soochow University, Suzhou, China
- Institute of Blood and Marrow Transplantation, Collaborative Innovation Center of Hematology, Soochow University, Suzhou, China
| | - Rui Zhang
- National Clinical Research Center for Hematologic Diseases, Jiangsu Institute of Hematology, The First Affiliated Hospital of Soochow University, Suzhou, China
- Institute of Blood and Marrow Transplantation, Collaborative Innovation Center of Hematology, Soochow University, Suzhou, China
| | - Xueqian Li
- National Clinical Research Center for Hematologic Diseases, Jiangsu Institute of Hematology, The First Affiliated Hospital of Soochow University, Suzhou, China
- Institute of Blood and Marrow Transplantation, Collaborative Innovation Center of Hematology, Soochow University, Suzhou, China
| | - Chang Wang
- State Key Laboratory of Radiation Medicine and Protection, Soochow University, Suzhou, China
| | - Changgeng Ruan
- National Clinical Research Center for Hematologic Diseases, Jiangsu Institute of Hematology, The First Affiliated Hospital of Soochow University, Suzhou, China
- Institute of Blood and Marrow Transplantation, Collaborative Innovation Center of Hematology, Soochow University, Suzhou, China
- Key Laboratory of Thrombosis and Hemostasis of Ministry of Health, Suzhou, China
- State Key Laboratory of Radiation Medicine and Protection, Soochow University, Suzhou, China
| | - Yue Han
- National Clinical Research Center for Hematologic Diseases, Jiangsu Institute of Hematology, The First Affiliated Hospital of Soochow University, Suzhou, China
- Institute of Blood and Marrow Transplantation, Collaborative Innovation Center of Hematology, Soochow University, Suzhou, China
- Key Laboratory of Thrombosis and Hemostasis of Ministry of Health, Suzhou, China
- State Key Laboratory of Radiation Medicine and Protection, Soochow University, Suzhou, China
- *Correspondence: Yue Han,
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Helicobacter pylori Recurrence after Eradication Therapy in Jiangjin District, Chongqing, China. Gastroenterol Res Pract 2020; 2020:7510872. [PMID: 32328098 PMCID: PMC7165334 DOI: 10.1155/2020/7510872] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/17/2019] [Revised: 03/13/2020] [Accepted: 03/24/2020] [Indexed: 02/07/2023] Open
Abstract
Purpose To investigate the recurrence rate of Helicobacter pylori infection after eradication in Jiangjin District, Chongqing, China, and to analyze the related causes. Methods Outpatients who were eradicated of H. pylori infection with standard therapy between August 2014 and August 2017 were included in this study. The recurrence rate was investigated 1 year later. Data regarding gender, smoking, alcohol intake, frequency of eating out, and treatment strategy were recorded, and their relationships with the recurrence rate were analyzed. Multivariate logistic regression analysis was performed to determine the independent risk factors for H. pylori infection recurrence. Results In total, 400 patients (225 males and 175 females) were included in this study. Of them, the recurrence rate of H. pylori infection was 4.75% (19/400), with 5.33% (12/225) in males and 4.57% (7/175) in females, showing no gender difference. The recurrence rate was 7.03% (9/128) in smokers and 3.68% (10/272) in nonsmokers, while it was 6.45% (12/186) in those who drink alcohol and 3.27% (7/214) in those who do not drink alcohol, showing no significant differences. The higher the frequency of eating out, the higher the recurrence rate of H. pylori infection (P = 0.001). There was a statistically significant difference in the recurrence rate between patients receiving treatment alone and patients whose family members also received treatment (6.08% vs. 0.96%, P = 0.035). Drinking and dining out were independent risk factors for H. pylori infection recurrence (P = 0.014 for drinkers and P = 0.015 and P = 0.003 for those who sometimes and often dine out, respectively). Conclusions The overall recurrence rate after H. pylori eradication by standard therapy in Jiangjin District is 4.75%. Reducing the frequency of eating out and family members receiving treatment may reduce the recurrence of H. pylori infection.
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Ribera-Fonseca A, Jiménez D, Leal P, Riquelme I, Roa JC, Alberdi M, Peek RM, Reyes-Díaz M. The Anti-Proliferative and Anti-Invasive Effect of Leaf Extracts of Blueberry Plants Treated with Methyl Jasmonate on Human Gastric Cancer In Vitro Is Related to Their Antioxidant Properties. Antioxidants (Basel) 2020; 9:antiox9010045. [PMID: 31948009 PMCID: PMC7023271 DOI: 10.3390/antiox9010045] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2019] [Revised: 01/02/2020] [Accepted: 01/02/2020] [Indexed: 12/15/2022] Open
Abstract
Gastric cancer is the third main cause of cancerous tumors in humans in Chile. It is well-accepted that a diet rich in antioxidant plants could help in fighting cancer. Blueberry is a fruit crop with a high content of antioxidants. Methyl jasmonate (MeJA) is a phytohormone involved in plant defenses under stress conditions. The exogenous application of MeJA can improve the antioxidant properties in plants. We studied in vitro and in vivo anticancer action on human gastric cancer (cell line AGS) and the antioxidant properties of extracts from blueberry plants untreated and treated with MeJA. The results demonstrated that leaf extracts displayed a higher inhibition of cancer cell viability as well as greater antioxidant properties compared to fruit extracts. Besides, MeJA applications to plants improved the antioxidant properties of leaf extracts (mainly anthocyanins), increasing their inhibition levels on cell viability and migration. It is noteworthy that leaf extract from MeJA-treated plants significantly decreased cancer cell migration and expression of gastric cancer-related proteins, mainly related to the mitogen-activating protein kinase (MAPK) pathway. Interestingly, in all cases the anticancer and antioxidant properties of leaf extracts were strongly related. Despite highlighted outcomes, in vivo results did not indicate significant differences in Helicobacter pylori colonization nor inflammation levels in Mongolian gerbils unfed and fed with blueberry leaf extract. Our findings demonstrated that MeJA increased antioxidant compounds, mainly anthocyanins, and decreased the viability and migration capacity of AGS cells. In addition, leaf extracts from MeJA-treated plants were also able to decrease the expression of gastric cancer-related proteins. Our outcomes also revealed that the anthocyanin-rich fraction of blueberry leaf extracts showed higher in vitro antiproliferative and anti-invasive effects than the crude leaf extracts. However, it is still uncertain whether the leaf extracts rich in anthocyanins of blueberry plants are capable of exerting a chemopreventive or chemoprotective effect against gastric cancer on an in vivo model.
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Affiliation(s)
- Alejandra Ribera-Fonseca
- Centro de Fruticultura, Facultad de Ciencias Agropecuarias y Forestales, Universidad de La Frontera, Avenida Francisco Salazar 01145, P.O. Box 54-D, Temuco 4811230, Chile
- Center of Plant-Soil Interaction and Natural Resources Biotechnology, Scientific and Technological Bioresource Nucleus (BIOREN-UFRO), Universidad de La Frontera, Avenida Francisco Salazar, P.O. Box 54-D, Temuco 4811230, Chile; (D.J.); (M.A.)
| | - Danae Jiménez
- Center of Plant-Soil Interaction and Natural Resources Biotechnology, Scientific and Technological Bioresource Nucleus (BIOREN-UFRO), Universidad de La Frontera, Avenida Francisco Salazar, P.O. Box 54-D, Temuco 4811230, Chile; (D.J.); (M.A.)
| | - Pamela Leal
- Center of Excellence in Translational Medicine (CEMT), Biomedicine and Translational Research Laboratory, Universidad de La Frontera, Avenida Alemania 0458, 4th Floor, P.O. Box 54-D, Temuco 4810296, Chile;
| | - Ismael Riquelme
- Instituto de Ciencias Biomédicas, Facultad de Ciencias de la Salud, Universidad Autónoma de Chile, Temuco 4180101, Chile;
| | - Juan Carlos Roa
- Department of Pathology, UC Centre for Investigational Oncology (CITO), Advanced Centre for Chronic Diseases (ACCDis), The Millennium Institute on Immunology and Immunotherapy, Pontificia Universidad Católica de Chile, Santiago 8330034, Chile;
| | - Miren Alberdi
- Center of Plant-Soil Interaction and Natural Resources Biotechnology, Scientific and Technological Bioresource Nucleus (BIOREN-UFRO), Universidad de La Frontera, Avenida Francisco Salazar, P.O. Box 54-D, Temuco 4811230, Chile; (D.J.); (M.A.)
| | - Richard M. Peek
- Division of Gastroenterology, Department of Medicine, Vanderbilt University Medical Center, Nashville, TN 37232-0252, USA;
- Department of Pathology, Microbiology, and Immunology, Vanderbilt University Medical Center, Nashville, TN 37232-0252, USA
| | - Marjorie Reyes-Díaz
- Center of Plant-Soil Interaction and Natural Resources Biotechnology, Scientific and Technological Bioresource Nucleus (BIOREN-UFRO), Universidad de La Frontera, Avenida Francisco Salazar, P.O. Box 54-D, Temuco 4811230, Chile; (D.J.); (M.A.)
- Departamento de Ciencias Químicas y Recursos Naturales, Facultad de Ingeniería y Ciencias, Universidad de La Frontera, Avenida Francisco Salazar, P.O. Box 54-D, Temuco 4811230, Chile
- Correspondence: ; Tel.: +56-45-2325421
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Liu R, Liu Q, He Y, Shi W, Xu Q, Yuan Q, Lin Q, Li B, Ye L, Min Y, Zhu P, Shao Y. Association between Helicobacter pylori infection and nonalcoholic fatty liver: A meta-analysis. Medicine (Baltimore) 2019; 98:e17781. [PMID: 31689846 PMCID: PMC6946209 DOI: 10.1097/md.0000000000017781] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND Opinion regarding whether Helicobacter pylori infection can promote the occurrence and development of nonalcoholic fatty liver (NAFLD) is divided. Therefore, we aimed to assess the exact relationship between H pylori infection and NAFLD by integrating all available data. METHODS The articles about H pylori infection and NAFLD were collected by searching the databases of PubMed, Embase, Web of Science, Scopus, China National Knowledge Infrastructure, and WanFang. The random-effects model was used for data analysis, followed by subgroup analysis and meta-regression to explore sources of heterogeneity. RESULTS Twenty-one articles were included in the study. Pooled analysis showed that H pylori infection indeed promoted NAFLD. Subgroup analysis and regression analysis showed that case-control ratio may be one of the sources of heterogeneity. CONCLUSIONS H pylori infection is indeed one of the factors that promotes the progression of NAFLD for the Asian population. This provides new approaches for clinical prevention and treatment for NAFLD.
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Affiliation(s)
- Rongqiang Liu
- Department of Ophthalmology, The First Affiliated Hospital of Nanchang University, Nanchang, Jiangxi
- Department of Hepatobiliary Surgery, The First Affiliated Hospital of Guangzhou Medical University
| | - Qiuli Liu
- Biological Therapy Center, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, Guangdong, China
| | - Ying He
- Department of Ophthalmology, The First Affiliated Hospital of Nanchang University, Nanchang, Jiangxi
| | - Wenqing Shi
- Department of Ophthalmology, The First Affiliated Hospital of Nanchang University, Nanchang, Jiangxi
| | - Qianhui Xu
- Department of Ophthalmology, The First Affiliated Hospital of Nanchang University, Nanchang, Jiangxi
| | - Qing Yuan
- Department of Ophthalmology, The First Affiliated Hospital of Nanchang University, Nanchang, Jiangxi
| | - Qi Lin
- Department of Ophthalmology, The First Affiliated Hospital of Nanchang University, Nanchang, Jiangxi
| | - Biao Li
- Department of Ophthalmology, The First Affiliated Hospital of Nanchang University, Nanchang, Jiangxi
| | - Lei Ye
- Department of Ophthalmology, The First Affiliated Hospital of Nanchang University, Nanchang, Jiangxi
| | - Youlan Min
- Department of Ophthalmology, The First Affiliated Hospital of Nanchang University, Nanchang, Jiangxi
| | - Peiwen Zhu
- Department of Ophthalmology, The First Affiliated Hospital of Nanchang University, Nanchang, Jiangxi
| | - Yi Shao
- Department of Ophthalmology, The First Affiliated Hospital of Nanchang University, Nanchang, Jiangxi
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Kell DB, Kenny LC. A Dormant Microbial Component in the Development of Preeclampsia. Front Med (Lausanne) 2016; 3:60. [PMID: 27965958 PMCID: PMC5126693 DOI: 10.3389/fmed.2016.00060] [Citation(s) in RCA: 44] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2016] [Accepted: 11/04/2016] [Indexed: 12/12/2022] Open
Abstract
Preeclampsia (PE) is a complex, multisystem disorder that remains a leading cause of morbidity and mortality in pregnancy. Four main classes of dysregulation accompany PE and are widely considered to contribute to its severity. These are abnormal trophoblast invasion of the placenta, anti-angiogenic responses, oxidative stress, and inflammation. What is lacking, however, is an explanation of how these themselves are caused. We here develop the unifying idea, and the considerable evidence for it, that the originating cause of PE (and of the four classes of dysregulation) is, in fact, microbial infection, that most such microbes are dormant and hence resist detection by conventional (replication-dependent) microbiology, and that by occasional resuscitation and growth it is they that are responsible for all the observable sequelae, including the continuing, chronic inflammation. In particular, bacterial products such as lipopolysaccharide (LPS), also known as endotoxin, are well known as highly inflammagenic and stimulate an innate (and possibly trained) immune response that exacerbates the inflammation further. The known need of microbes for free iron can explain the iron dysregulation that accompanies PE. We describe the main routes of infection (gut, oral, and urinary tract infection) and the regularly observed presence of microbes in placental and other tissues in PE. Every known proteomic biomarker of "preeclampsia" that we assessed has, in fact, also been shown to be raised in response to infection. An infectious component to PE fulfills the Bradford Hill criteria for ascribing a disease to an environmental cause and suggests a number of treatments, some of which have, in fact, been shown to be successful. PE was classically referred to as endotoxemia or toxemia of pregnancy, and it is ironic that it seems that LPS and other microbial endotoxins really are involved. Overall, the recognition of an infectious component in the etiology of PE mirrors that for ulcers and other diseases that were previously considered to lack one.
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Affiliation(s)
- Douglas B. Kell
- School of Chemistry, The University of Manchester, Manchester, UK
- The Manchester Institute of Biotechnology, The University of Manchester, Manchester, UK
- Centre for Synthetic Biology of Fine and Speciality Chemicals, The University of Manchester, Manchester, UK
- *Correspondence: Douglas B. Kell,
| | - Louise C. Kenny
- The Irish Centre for Fetal and Neonatal Translational Research (INFANT), University College Cork, Cork, Ireland
- Department of Obstetrics and Gynecology, University College Cork, Cork, Ireland
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Pedrini MJF, Seewann A, Bennett KA, Wood AJT, James I, Burton J, Marshall BJ, Carroll WM, Kermode AG. Helicobacter pylori infection as a protective factor against multiple sclerosis risk in females. J Neurol Neurosurg Psychiatry 2015; 86:603-7. [PMID: 25602009 DOI: 10.1136/jnnp-2014-309495] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/22/2014] [Accepted: 11/30/2014] [Indexed: 12/13/2022]
Abstract
BACKGROUND In recent years, a relationship between Helicobacter pylori and many disease conditions has been reported, however, studies in its relationship with multiple sclerosis (MS) have had contradictory results. OBJECTIVE To determine the association between the H. pylori infection and MS. METHODS 550 patients with MS were included in the study and were matched by gender and year of birth to 299 controls. Patients were assessed for clinical and demographic parameters. An enzyme immunoassay was used to detect the presence of specific IgG antibodies against H. pylori in the serum sample of both groups. RESULTS H. pylori seropositivity was found to be lower in the patients with MS than in controls (16% vs 21%) with the decrease pertaining to females (14% vs 22%, p=0.027) but not males (19% vs 20%, p=1.0). When adjusted for age at onset, year of birth and disease duration, H. pylori seropositive females presented with a lower disability score than seronegative females (p=0.049), while among males the reverse was true (p=0.025). There was no significant association between H. pylori seropositivity and relapse rate. CONCLUSIONS Our results could reflect a protective role of H. pylori in the disease development. However, it may be that H. pylori infection is a surrogate marker for the 'hygiene hypothesis', a theory which postulates that early life infections are essential to prime the immune system and thus prevent allergic and autoimmune conditions later in life. The fact that the association between H. pylori seropositivity and MS risk was seen almost exclusively in females requires further investigation.
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Affiliation(s)
- Marzena J Fabis Pedrini
- Centre for Neuromuscular and Neurological Disorders, Western Australian Neuroscience Research Institute, The University of Western Australia, Sir Charles Gairdner Hospital, QEII Medical Centre, Nedlands, Australia
| | - Alexandra Seewann
- Department of Neurology, VU University Medical Center, Amsterdam, Netherlands
| | - Kirsten A Bennett
- Centre for Neuromuscular and Neurological Disorders, Western Australian Neuroscience Research Institute, The University of Western Australia, Sir Charles Gairdner Hospital, QEII Medical Centre, Nedlands, Australia
| | - Alex J T Wood
- Centre for Neuromuscular and Neurological Disorders, Western Australian Neuroscience Research Institute, The University of Western Australia, Sir Charles Gairdner Hospital, QEII Medical Centre, Nedlands, Australia
| | - Ian James
- Institute for Immunology and Infectious Diseases, Murdoch University, Murdoch, Australia
| | - Jason Burton
- Centre for Neuromuscular and Neurological Disorders, Western Australian Neuroscience Research Institute, The University of Western Australia, Sir Charles Gairdner Hospital, QEII Medical Centre, Nedlands, Australia
| | - Barry J Marshall
- The Marshall Centre for Infectious Diseases Research and Training, The University of Western Australia, QEII Medical Centre, Nedlands, Australia
| | - William M Carroll
- Centre for Neuromuscular and Neurological Disorders, Western Australian Neuroscience Research Institute, The University of Western Australia, Sir Charles Gairdner Hospital, QEII Medical Centre, Nedlands, Australia
| | - Allan G Kermode
- Centre for Neuromuscular and Neurological Disorders, Western Australian Neuroscience Research Institute, The University of Western Australia, Sir Charles Gairdner Hospital, QEII Medical Centre, Nedlands, Australia Institute for Immunology and Infectious Diseases, Murdoch University, Murdoch, Australia
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Som S, Maity A, Banik GD, Ghosh C, Chaudhuri S, Daschakraborty SB, Ghosh S, Pradhan M. Excretion kinetics of 13C-urea breath test: influences of endogenous CO2 production and dose recovery on the diagnostic accuracy of Helicobacter pylori infection. Anal Bioanal Chem 2014; 406:5405-12. [PMID: 24939135 DOI: 10.1007/s00216-014-7951-0] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2014] [Revised: 05/08/2014] [Accepted: 06/05/2014] [Indexed: 12/11/2022]
Abstract
We report for the first time the excretion kinetics of the percentage dose of (13)C recovered/h ((13)C-PDR %/h) and cumulative PDR, i.e. c-PDR (%) to accomplish the highest diagnostic accuracy of the (13)C-urea breath test ((13)C-UBT) for the detection of Helicobacter pylori infection without any risk of diagnostic errors using an optical cavity-enhanced integrated cavity output spectroscopy (ICOS) method. An optimal diagnostic cut-off point for the presence of H. pylori infection was determined to be c-PDR (%) = 1.47 % at 60 min, using the receiver operating characteristic curve (ROC) analysis to overcome the "grey zone" containing false-positive and false-negative results of the (13)C-UBT. The present (13)C-UBT exhibited 100 % diagnostic sensitivity (true-positive rate) and 100 % specificity (true-negative rate) with an accuracy of 100 % compared with invasive endoscopy and biopsy tests. Our c-PDR (%) methodology also manifested both diagnostic positive and negative predictive values of 100 %, demonstrating excellent diagnostic accuracy. We also observed that the effect of endogenous CO2 production related to basal metabolic rates in individuals was statistically insignificant (p = 0.78) on the diagnostic accuracy. However, the presence of H. pylori infection was indicated by the profound effect of urea hydrolysis rate (UHR). Our findings suggest that the current c-PDR (%) is a valid and sufficiently robust novel approach for an accurate, specific, fast and noninvasive diagnosis of H. pylori infection, which could routinely be used for large-scale screening purposes and diagnostic assessment, i.e. for early detection and follow-up of patients.
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Affiliation(s)
- Suman Som
- Department of Chemical, Biological and Macromolecular Sciences, S.N. Bose National Centre for Basic Sciences, Salt Lake, JD Block, Sector III, Kolkata, 700098, India
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Noonavath RN, Lakshmi CP, Dutta TK, Kate V. Helicobacter pylori eradication in patients with chronic immune thrombocytopenic purpura. World J Gastroenterol 2014; 20:6918-6923. [PMID: 24944483 PMCID: PMC4051932 DOI: 10.3748/wjg.v20.i22.6918] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/07/2013] [Revised: 01/18/2014] [Accepted: 03/10/2014] [Indexed: 02/06/2023] Open
Abstract
AIM: To assess the effect of Helicobacter pylori (H. pylori) eradication on platelet counts in patients with chronic immune thrombocytopenic purpura (cITP).
METHODS: A total of 36 cITP patients were included in the study. The diagnosis of H. pylori was done by rapid urease test and Giemsa staining of the gastric biopsy specimen. All H. pylori positive patients received standard triple therapy for 14 d and were subjected for repeat endoscopy at 6 wk. Patients who continued to be positive for H. pylori on second endoscopy received second line salvage therapy. All the patients were assessed for platelet response at 6 wk, 3rd and 6th months.
RESULTS: Of the 36 patients, 17 were positive for H. pylori infection and eradication was achieved in 16 patients. The mean baseline platelet count in the eradicated patients was 88615.38 ± 30117.93/mm3 and platelet count after eradication at 6 wk, 3 mo and 6 mo was 143230.77 ± 52437.51/mm3 (P = 0.003), 152562.50 ± 52892.3/mm3 (P = 0.0001), 150187.50 ± 41796.68/mm3 (P = 0.0001) respectively and in the negative patients, the mean baseline count was 71000.00 ± 33216.46/mm3 and at 6 wk, 3rd and 6th month follow up was 137631.58 ± 74364.13/mm3 (P = 0.001), 125578.95 ± 71472.1/mm3 (P = 0.005), 77210.53 ± 56892.28/mm3 (P = 0.684) respectively.
CONCLUSION: Eradication of H. pylori leads to increase in platelet counts in patients with cITP and can be recommended as a complementary treatment with conventional therapy.
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Kariya S, Okano M, Nishizaki K. An association between Helicobacter pylori and upper respiratory tract disease: Fact or fiction? World J Gastroenterol 2014; 20:1470-1484. [PMID: 24587622 PMCID: PMC3925855 DOI: 10.3748/wjg.v20.i6.1470] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/16/2013] [Revised: 11/03/2013] [Accepted: 01/06/2014] [Indexed: 02/06/2023] Open
Abstract
Helicobacter pylori (H. pylori) is a major cause of chronic gastritis and gastric ulcers and considerable evidence supports the notion that infection with this bacterium is also associated with gastric malignancy in addition to various other conditions including pulmonary, vascular and autoimmune disorders. Gastric juice infected with H. pylori might play an important role in upper respiratory tract infection. Although direct and/or indirect mechanisms might be involved in the association between H. pylori and upper respiratory tract diseases, the etiological role of H. pylori in upper respiratory tract disorders has not yet been fully elucidated. Although various studies over the past two decades have suggested a relationship between H. pylori and upper respiratory tract diseases, the findings are inconsistent. The present overview describes the outcomes of recent investigations into the impact of H. pylori on upper respiratory tract and adjacent lesions.
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Nakashita M, Suzuki H, Miura S, Taki T, Uehara K, Mizushima T, Nagata H, Hibi T. Attenuation of acetic acid-induced gastric ulcer formation in rats by glucosylceramide synthase inhibitors. Dig Dis Sci 2013; 58:354-62. [PMID: 22918683 DOI: 10.1007/s10620-012-2350-x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/10/2012] [Accepted: 07/28/2012] [Indexed: 01/26/2023]
Abstract
INTRODUCTION Ceramide has been suggested to play a role in apoptosis during gastric ulcerogenesis. The present study is designed to investigate whether accumulated ceramide could serve as the effector molecules of ulcer formation in a rat model of acetic acid-induced gastric ulcer. METHODS The effect of fumonisin B1, an inhibitor of ceramide synthase, and of d,l,-threo-1-phenyl-2-hexadecanoylamino-3-morpholino-1-propanol (PPMP) and N-butyldeoxynojirimycin (NB-DNJ), both inhibitors of glucosylceramide synthase, on the accumulation of ceramide and formation of gastric ulcer were examined in the rat model of acetic acid-induced gastric ulcer. RESULTS Fumonisin B1 attenuated acetic acid-induced gastric ulcer formation, associated with a decrease in the number of apoptotic cells. Our results showed that it is neither the C18- nor the C24-ceramide itself, but the respective metabolites that were ulcerogenic, because PPMP and NB-DNJ attenuated gastric mucosal apoptosis and the consequent mucosal damage in spite of their reducing the degradation of ceramide. CONCLUSION The ceramide pathway, in particular, the metabolites of ceramide, significantly contributes to acetic acid-induced gastric damage, possibly via enhancing apoptosis. On the other hand, PPMP and NB-DNJ treatment attenuated gastric mucosal apoptosis and ulcer formation despite increasing the ceramide accumulation, suggesting that it was not the ceramides themselves, but their metabolites that contributed to the ulcer formation in the acetic acid-induced gastric ulcer model.
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Affiliation(s)
- Manabu Nakashita
- Division of Gastroentrology and Hepatology, Department of Internal Medicine, School of Medicine, Keio University, 35 Shinanomachi, Shinjuku-ku, Tokyo, 160-8582, Japan
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Saito M, Morioka M, Wakasa K, Izumiyama K, Mori A, Irie T, Tanaka M, Tanaka S. In Japanese patients with type A gastritis with pernicious anemia the condition is very poorly associated with Helicobacter pylori infection. J Infect Chemother 2013; 19:208-10. [DOI: 10.1007/s10156-012-0476-6] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2012] [Accepted: 09/06/2012] [Indexed: 10/27/2022]
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12
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Chung JW, Kim YJ, Lee SJ, Hahm KB. Korean Red Ginseng: Qualitative and Quantitative Benefits on Helicobacter pylori Infection. J Ginseng Res 2010; 34:77-88. [DOI: 10.5142/jgr.2010.34.2.077] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/30/2023] Open
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13
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Matsuo A, Tanaka R, Shiotani A, Haruma K, Ishii N, Hashimoto T, Fujimoto W. Remission of sublamina densa-type linear IgA bullous dermatosis after Helicobacter pylori eradication. Clin Exp Dermatol 2009; 34:e988-9. [PMID: 19832860 DOI: 10.1111/j.1365-2230.2009.03631.x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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14
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Wassermann GE, Olivera-Severo D, Uberti AF, Carlini CR. Helicobacter pylori urease activates blood platelets through a lipoxygenase-mediated pathway. J Cell Mol Med 2009; 14:2025-34. [PMID: 19754669 PMCID: PMC3823284 DOI: 10.1111/j.1582-4934.2009.00901.x] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
The bacterium Helicobacter pylori causes peptic ulcers and gastric cancer in human beings by mechanisms yet not fully understood. H. pylori produces urease which neutralizes the acidic medium permitting its survival in the stomach. We have previously shown that ureases from jackbean, soybean or Bacillus pasteurii induce blood platelet aggregation independently of their enzyme activity by a pathway requiring platelet secretion, activation of calcium channels and lipoxygenase-derived eicosanoids. We investigated whether H. pylori urease displays platelet-activating properties and defined biochemical pathways involved in this phenomenon. For that the effects of purified recombinant H. pylori urease (HPU) added to rabbit platelets were assessed turbidimetrically. ATP secretion and production of lipoxygenase metabolites by activated platelets were measured. Fluorescein-labelled HPU bound to platelets but not to erythrocytes. HPU induced aggregation of rabbit platelets (ED(50) 0.28 microM) accompanied by ATP secretion. No correlation was found between platelet activation and ureolytic activity of HPU. Platelet aggregation was blocked by esculetin (12-lipoxygenase inhibitor) and enhanced approximately 3-fold by indomethacin (cyclooxygenase inhibitor). A metabolite of 12-lipoxygenase was produced by platelets exposed to HPU. Platelet responses to HPU did not involve platelet-activating factor, but required activation of verapamil-inhibitable calcium channels. Our data show that purified H. pylori urease activates blood platelets at submicromolar concentrations. This property seems to be common to ureases regardless of their source (plant or bacteria) or quaternary structure (single, di- or tri-chain proteins). These properties of HPU could play an important role in pathogenesis of gastrointestinal and associated cardiovascular diseases caused by H. pylori.
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Affiliation(s)
- German E Wassermann
- Graduate Program in Cellular and Molecular Biology, Center of Biotechnology, Federal University of Rio Grande do Sul, Porto Alegre, Brazil
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15
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Gómez-Burgaz M, Torrado G, Torrado S. Characterization and superficial transformations on mini-matrices made of interpolymer complexes of chitosan and carboxymethylcellulose during in vitro clarithromycin release. Eur J Pharm Biopharm 2009; 73:130-9. [DOI: 10.1016/j.ejpb.2009.04.004] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2008] [Revised: 12/30/2008] [Accepted: 04/17/2009] [Indexed: 11/24/2022]
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16
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Effects of eradication of Helicobacter pylori infection in patients with immune thrombocytopenic purpura: a systematic review. Blood 2009; 113:1231-40. [DOI: 10.1182/blood-2008-07-167155] [Citation(s) in RCA: 223] [Impact Index Per Article: 14.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
AbstractWhether the eradication of Helicobacter pylori infection can increase the platelet count in patients with immune thrombocytopenic purpura (ITP) is still a controversial issue. To provide evidence-based guidance, we performed a systematic review of the literature published in English, selecting articles reporting 15 or more total patients. We identified 25 studies including 1555 patients, of whom 696 were evaluable for the effects of H pylori eradication on platelet count. The weighted mean complete response (platelet count ≥ 100 × 109/L) and overall response (platelet count ≥ 30 × 109/L and at least doubling of the basal count) were 42.7% (95% confidence interval [CI], 31.8%-53.9%) and 50.3% (95% CI, 41.6%-59.0%), respectively. In 222 patients with a baseline platelet count less than 30 × 109/L, the complete response rate was 20.1% (95% CI, 13.5%-26.7%) and the overall response rate was 35.2% (95% CI, 28.0%-42.4%). The response rate tended to be higher in countries with a high background prevalence of H pylori infection and in patients with milder degrees of thrombocytopenia. These findings suggest that the detection and eradication of H pylori infection should be considered in the work-up of patients with seemingly typical ITP.
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Kebapcilar L, Sari I, Renkal AH, Alacacioglu A, Yuksel A, Ilhan E, Alkan B, Yuksel D, Kozaci DL, Gunay N. The influence of Helicobacter pylori eradication on leptin, soluble CD40 ligand, oxidative stress and body composition in patients with peptic ulcer disease. Intern Med 2009; 48:2055-9. [PMID: 20009392 DOI: 10.2169/internalmedicine.48.2562] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
OBJECTIVE To determine the effect of Helicobacter pylori (H. pylori) eradication on blood levels of soluble CD40 ligand, leptin, oxidative stress and body composition in patients with dyspepsia infected with H. pylori. METHODS The infection of H. pylori was based on the presence of both (14)C urea breath test (UBT) and histology. Patients were given triple eradication therapy for 14 days and at 3 months after the treatment, (14)C UBT was reinstituted. Fasting glucose, leptin, body composition, soluble CD40 ligand, total oxidant status (TOS) were studied before and at 3 months after the treatment. RESULTS In 33 subjects, H. pylori infection was successfully eradicated. sCD40L, and TOS levels were significantly decreased after H. pylori eradication. The percentage of body fat and body fat mass significantly decreased whereas the fat free mass (FFM) increased after eradication. However, eradication of the organism yielded no differences in leptin levels. CONCLUSION These findings suggest that H. pylori eradication reduces the sCD40L and oxidative stress, fat mass with a significant increase in fat free mass. Thus, eradication of H. pylori infection not only improves ulcer healing, but may also reduce the presumed atherosclerosis risk.
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Affiliation(s)
- Levent Kebapcilar
- Department of Internal Medicine, Izmir Bozyaka Training and Research Hospital, Izmir, Turkey.
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18
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Tajima A, Koizumi K, Suzuki K, Higashi N, Takahashi M, Shimada T, Terano A, Hiraishi H, Kuwayama H. Proton pump inhibitors and recurrent bleeding in peptic ulcer disease. J Gastroenterol Hepatol 2008; 23 Suppl 2:S237-41. [PMID: 19120905 DOI: 10.1111/j.1440-1746.2008.05557.x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Peptic ulcer disease (PUD) is one of the main lesions responsible for upper gastrointestinal (GI) bleeding, as well as esophageal varices and Mallory-Weiss tear. Helicobacter pylori and non-steroidal anti-inflammatory drugs (NSAIDs)/aspirin are the major responsible causes. In cases of upper GI bleeding, urgent endoscopy is performed after stabilization of vital signs. There are several modalities for controlling bleeding in PUD, such as ethanol injection or hypertonic saline with epinephrine. Recurrent bleeding occurs in 20% of patients after endoscopic therapy. The combination of endoscopic intervention and a proton pump inhibitor (PPI) is necessary to achieve hemostasis of active bleeding. It has been reported that high-dose omeprazole (80 mg bolus injection, then 8 mg/h continuous infusion for 72 h, then 40 mg/day orally for 1 week) can reduce recurrent bleeding, the need for surgery and mortality from hemorrhagic shock in patients with high-risk peptic ulcer bleeding, as compared with standard-dose omeprazole. The metabolism of PPIs is dependent upon P450 2C19 genotypes and the clinical usefulness of genotypic analysis remains to be determined.
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Affiliation(s)
- Akihiro Tajima
- Department of Gastroenterology, Dokkyo Medical University, Koshigaya Hospital, Koshigaya, Japan.
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He QY, Yang H, Wong BCY, Chiu JF. Serological proteomics of gastritis: degradation of apolipoprotein A-I and alpha1-antitrypsin is a common response to inflammation irrespective of Helicobacter pylori infection. Dig Dis Sci 2008; 53:3112-8. [PMID: 18594986 DOI: 10.1007/s10620-008-0269-z] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/22/2008] [Accepted: 03/26/2008] [Indexed: 01/23/2023]
Abstract
Proteomic technology was employed to analyze serum samples from healthy subjects (10 cases) and gastritis patients with negative and positive Helicobacter pylori (Hp) infection (15 cases each). The serum proteins were separated by two-dimensional (2-D) gel electrophoresis and analyzed by a computer-aided program. The altered proteins in expression were then identified by mass spectrometry and validated by Western blotting. Compared to those in normal control, proteins in at least six areas of 2-D gels were found to significantly increase their expression levels in both Hp-negative and Hp-positive serum samples. These proteins were identified by mass peptide fingerprinting and confirmed by Western blotting to be the truncated or cleaved protein fragments of apolipoprotein A-I and alpha-1 antitrypsin, two well-known acute-phase proteins. We conclude that the degradation or metabolization of acute-phase proteins, apolipoprotein A-I, and alpha1-antitrypsin, is a common response to gastric inflammation irrespective of Hp infection.
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Affiliation(s)
- Qing-Yu He
- Institute of Life and Health Engineering, Jinan University, Guangzhou, 510632, China.
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20
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Andrès E, Federici L, Serraj K, Kaltenbach G. Update of nutrient-deficiency anemia in elderly patients. Eur J Intern Med 2008; 19:488-93. [PMID: 19013375 DOI: 10.1016/j.ejim.2008.01.016] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/25/2007] [Revised: 12/27/2007] [Accepted: 01/20/2008] [Indexed: 01/21/2023]
Abstract
Anemia, defined as a hemoglobin level < 13 g/dL in men and < 12 g/dL in women, is an important healthcare concern among the elderly. Nutrient-deficiency anemia represents one third of all anemias in elderly patients. About two thirds of nutrient-deficiency anemia is associated with iron deficiency and most of those cases are the result of chronic blood loss from gastrointestinal lesions. The remaining cases of nutrient-deficiency anemia are usually associated with vitamin B12, most frequently related to food-cobalamin malabsorption, and/or folate deficiency and are easily treated (nutrient-deficiency replacement).
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Affiliation(s)
- Emmanuel Andrès
- Department of Internal Medicine, University Hospital of Strasbourg, Strasbourg, France.
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21
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Serraj K, Federici L, Kaltenbach G, Andrès E. Anémies carentielles du sujet âgé. Presse Med 2008; 37:1319-26. [DOI: 10.1016/j.lpm.2007.08.022] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/04/2007] [Revised: 08/06/2007] [Accepted: 08/22/2007] [Indexed: 10/21/2022] Open
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22
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Gómez-Burgaz M, García-Ochoa B, Torrado-Santiago S. Chitosan–carboxymethylcellulose interpolymer complexes for gastric-specific delivery of clarithromycin. Int J Pharm 2008; 359:135-43. [DOI: 10.1016/j.ijpharm.2008.03.042] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2008] [Revised: 03/26/2008] [Accepted: 03/28/2008] [Indexed: 10/22/2022]
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de Korwin JD. [Does Helicobacter pylori infection play a role in extragastric diseases?]. Presse Med 2008; 37:525-34. [PMID: 18249521 DOI: 10.1016/j.lpm.2007.07.029] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/19/2007] [Accepted: 07/02/2007] [Indexed: 12/19/2022] Open
Abstract
Since the discovery of Helicobacter pylori (H. pylori), numerous studies have considered the possibility that it plays a role in different extragastric diseases. Most of these studies may be classified as epidemiological studies or investigations of H. pylori eradication, but there are also case reports and in vitro studies. This review reveals the limitations common to most of them. Idiopathic thrombocytopenic purpura is the disease for which the strongest association with H. pylori infection has been shown. Data are also accumulating about the role of H. pylori infection in idiopathic iron deficiency anemia and chronic idiopathic urticaria. Interesting results show that H. pylori infection affects atherosclerosis and is weakly associated with ischemic heart disease and stroke. Moreover, CagA-positive H. pylori strains may play a role in the natural history of atherosclerotic stroke. Recent studies suggest a link between H. pylori and Parkinson's disease. Preliminary data indicate that H. pylori infection impairs gastric ghrelin production and may influence nutritional status. The association between H. pylori infection and other extragastric diseases remains controversial. H. pylori infection may cause extragastric manifestations directly or indirectly, by various mechanisms including atrophic gastritis, the release of inflammatory mediators, molecular mimicry, and systemic immune response. Evidence suggests that anti-H. pylori therapy improves idiopathic thrombocytopenic purpura (significant increase of platelet count in half of the cases), iron-deficiency anemia, and chronic urticaria (30% remission rate), but the data from randomized controlled trials are insufficient to confirm these positive effects.
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Affiliation(s)
- Jean-Dominique de Korwin
- Service de médecine interne H, Université Henri Poincaré, CHU de Nancy-Hôpital Central, F-54035 Nancy Cedex, France.
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Salles N, Mégraud F. Current management of Helicobacter pylori infections in the elderly. Expert Rev Anti Infect Ther 2007; 5:845-56. [PMID: 17914918 DOI: 10.1586/14787210.5.5.845] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Helicobacter pylori infection is a chronic gastric gram-negative infection that increases with age worldwide. However, the percentage age of H. pylori-positive elderly patients who are tested and treated for their infection remains very low. It is now demonstrated that H. pylori infection induces a whole cascade of events leading to gastric pathologies, such as peptic ulcer diseases, gastric precancerous lesions and gastric cancer. Recent data also demonstrated that H. pylori chronic infection can play a role in gastric aging, appetite regulation and extradigestive diseases, such as Alzheimer's disease, in the elderly. The diagnosis of H. pylori infection remains difficult to realize in the very old population, and the urea breath test obtains the best performance in this population. 1-week proton pump inhibitor-based triple therapy regimens are highly effective and well tolerated in elderly patients, and antibiotic resistance remains very low. Low compliance is the main factor related to treatment failure in this population.
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Affiliation(s)
- Nathalie Salles
- Pôle de gérontologie clinique, Hôpital Xavier-Arnozan, CHU Bordeaux, 33604 Pessac, France.
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Abstract
AIM: To validate an optimized 13C-urea breath test (13C-UBT) protocol for the diagnosis of H pylori infection that is cost-efficient and maintains excellent diagnostic accuracy.
METHODS: 70 healthy volunteers were tested with two simplified 13C-UBT protocols, with test meal (Protocol 2) and without test meal (Protocol 1). Breath samples were collected at 10, 20 and 30 min after ingestion of 50 mg 13C-urea dissolved in 10 mL of water, taken as a single swallow, followed by 200 mL of water (pH 6.0) and a circular motion around the waistline to homogenize the urea solution. Performance of both protocols was analyzed at various cut-off values. Results were validated against the European protocol.
RESULTS: According to the reference protocol, 65.7% individuals were positive for H pylori infection and 34.3% were negative. There were no significant differences in the ability of both protocols to correctly identify positive and negative H pylori individuals. However, only Protocol 1 with no test meal achieved accuracy, sensitivity, specificity, positive and negative predictive values of 100%. The highest values achieved by Protocol 2 were 98.57%, 97.83%, 100%, 100% and 100%, respectively.
CONCLUSION: A 10 min, 50 mg 13C-UBT with no test meal using a cut-off value of 2-2.5 is a highly accurate test for the diagnosis of H pylori infection at a reduced cost.
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Suzuki H, Hibi T, Marshall BJ. Helicobacter pylori: present status and future prospects in Japan. J Gastroenterol 2007; 42:1-15. [PMID: 17322988 PMCID: PMC2780612 DOI: 10.1007/s00535-006-1990-z] [Citation(s) in RCA: 114] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/03/2006] [Accepted: 12/04/2006] [Indexed: 02/07/2023]
Abstract
The discovery of Helicobacter pylori has already changed the natural history of peptic ulcer disease, with most patients being cured at their first presentation. Similarly, the incidence of gastric cancer and other diseases related to H. pylori are likely to be greatly reduced in the near future. Isolation of the spiral intragastric bacterium H. pylori totally reversed the false dogma that the stomach was sterile, and it taught us that chronic infectious disease can still exist in modern society. Helicobacter pylori's unique location, persistence, and evasion of the immune system offer important insights into the pathophysiology of the gut. Also, the fact that it was overlooked for so long encourages us to think "outside the box" when investigating other diseases with obscure etiologies. We should consider such provocative scientific ideas as bridges to the future disease control.
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Affiliation(s)
- Hidekazu Suzuki
- Division of Gastroenterology and Hepatology, Department of Internal Medicine, Keio University School of Medicine, Tokyo, Japan
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