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Yu J, Lv Y, Yang P, Jiang Y, Qin X, Wang X. Alcohol increases treatment failure for Helicobacter pylori eradication in Asian populations. BMC Gastroenterol 2023; 23:365. [PMID: 37880587 PMCID: PMC10599016 DOI: 10.1186/s12876-023-03002-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/09/2022] [Accepted: 10/17/2023] [Indexed: 10/27/2023] Open
Abstract
BACKGROUND AND AIM Whether alcohol intake is associated with Helicobacter pylori (H. pylori) eradication failure remains controversial, and this meta-analysis was aimed at investigating the effect of alcohol on the risk of H. pylori eradication failure. METHODS Relevant studies were systematically screened for and retrieved from PubMed and Web of Science (updated to January 2022), and relevant references were manually reviewed. The odds ratios (ORs) and 95% confidence intervals (CIs) were calculated. Subgroup, publication bias, and sensitivity analyses were also conducted. RESULTS A total of 40 studies were included in the meta-analysis. No significant association was found between alcohol consumption and the risk of H. pylori eradication failure (OR = 1.09, 95% CI, 0.94-1.26). However, in subgroup analyses stratified by region, a positive association was found in Asian patients (OR = 1.23, 95% CI, 1.03-1.47). In Asian patients, alcohol consumption was associated with the risk of H. pylori eradication failure when the duration of therapy was > 7 days (OR = 1.17, 95% CI, 1.10-1.25), when the treatment regimen included nitroimidazoles (OR = 1.16, 95% CI, 1.09-1.24), and when patients were treated with bismuth-containing quadruple therapy (OR = 1.17, 95% CI, 1.10-1.25). Alcohol intake > 40 g/day was associated with H. pylori eradication failure (OR = 3.17, 95% CI, 1.56-6.41). Moreover, in Asian patients who were administered a vonoprazan (VPZ)-based therapy regimen, alcohol consumption had no effect on H. pylori eradication rates (OR = 1.73, 95% CI, 0.98-3.05). CONCLUSION Our meta-analysis clearly showed that a higher daily alcohol intake was associated with a higher risk of H. pylori eradication failure in Asian populations. Moreover, a VPZ-based treatment regimen can prevent this effect.
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Affiliation(s)
- Jing Yu
- Department of Gastroenterology, The Affiliated Changzhou No. 2 People's Hospital of Nanjing Medical University, 29 Xinglong Lane, Tianning District, Changzhou, 213000, Jiangsu Province, China
- Graduate School, Dalian Medical University, 9 West Section of Lushun South Road, Lvshunkou District, Dalian, 116000, Liaoning Province, China
| | - Yiming Lv
- Department of Gastroenterology, The Affiliated Changzhou No. 2 People's Hospital of Nanjing Medical University, 29 Xinglong Lane, Tianning District, Changzhou, 213000, Jiangsu Province, China
| | - Peng Yang
- Department of Gastroenterology, The Affiliated Changzhou No. 2 People's Hospital of Nanjing Medical University, 29 Xinglong Lane, Tianning District, Changzhou, 213000, Jiangsu Province, China
- Graduate School, Dalian Medical University, 9 West Section of Lushun South Road, Lvshunkou District, Dalian, 116000, Liaoning Province, China
| | - Yizhou Jiang
- Department of Gastroenterology, The Affiliated Changzhou No. 2 People's Hospital of Nanjing Medical University, 29 Xinglong Lane, Tianning District, Changzhou, 213000, Jiangsu Province, China
| | - Xiangrong Qin
- Department of Gastroenterology, The Affiliated Changzhou No. 2 People's Hospital of Nanjing Medical University, 29 Xinglong Lane, Tianning District, Changzhou, 213000, Jiangsu Province, China
| | - Xiaoyong Wang
- Department of Gastroenterology, The Affiliated Changzhou No. 2 People's Hospital of Nanjing Medical University, 29 Xinglong Lane, Tianning District, Changzhou, 213000, Jiangsu Province, China.
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Panigrahi MK, Chouhan MI, Hallur VK, Makashir MS, Kumar C, Sethi S, Nayak HK, Padhy BM, Samal SC. Comparison of the efficacies of triple, quadruple and sequential antibiotic therapy in eradicating Helicobacter pylori infection: A randomized controlled trial. Indian J Gastroenterol 2023; 42:517-524. [PMID: 37195552 DOI: 10.1007/s12664-022-01322-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/17/2022] [Accepted: 12/09/2022] [Indexed: 05/18/2023]
Abstract
BACKGROUND AND AIM There is regional variation in the eradication rates of Helicobacter pylori (H. pylori) regimens depending on the local antibiotic resistance patterns. The aim of this study was to compare the efficacies of triple, quadruple and sequential antibiotic therapy in eradicating H. pylori infection. METHODS A total of 296 H. pylori-positive patients were randomized to receive one of the three regimens (triple, quadruple or sequential antibiotic therapy) and eradication rate was assessed by H. pylori stool antigen test. RESULTS The eradication rates of standard triple therapy, sequential therapy and quadruple therapy were 93%, 92.9% and 96.4%, respectively (p = 0.57). CONCLUSION Fourteen days of standard triple therapy, 14 days of bismuth-based quadruple therapy and 10 days of sequential therapy are equally efficacious in eradicating H. pylori and all regimens have optimum H. pylori eradication rates. TRIAL REGISTRATION ClinicalTrials.gov Identifier: CTRI/2020/04/024929.
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Affiliation(s)
- Manas Kumar Panigrahi
- Department of Gastroenterology, All India Institute of Medical Sciences, Sijua, Patrapada, Bhubaneswar, 751 019, India.
| | - Mohd Imran Chouhan
- Department of Medicine, Government Medical College, Rajouri, Jammu & Kashmir, 185 131, India
| | - Vinay Kumar Hallur
- Department of Microbiology, All India Institute of Medical Sciences, Bhubaneswar, 751 019, India
| | - Madhav Sameer Makashir
- Department of Gastroenterology, All India Institute of Medical Sciences, Sijua, Patrapada, Bhubaneswar, 751 019, India
| | - Chandan Kumar
- Department of Gastroenterology, All India Institute of Medical Sciences, Sijua, Patrapada, Bhubaneswar, 751 019, India
| | - Shivam Sethi
- Department of Gastroenterology, All India Institute of Medical Sciences, Sijua, Patrapada, Bhubaneswar, 751 019, India
| | - Hemanta Kumar Nayak
- Department of Gastroenterology, All India Institute of Medical Sciences, Sijua, Patrapada, Bhubaneswar, 751 019, India
| | - Biswa Mohan Padhy
- Department of Pharmacology, All India Institute of Medical Sciences, Bhubaneswar, 751 019, India
| | - Subash Chandra Samal
- Department of Gastroenterology, All India Institute of Medical Sciences, Sijua, Patrapada, Bhubaneswar, 751 019, India
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Moss SF, Chey WD, Daniele P, Pelletier C, Jacob R, Tremblay G, Hubscher E, Leifke E, Malfertheiner P. Brief communication: global temporal trends in the efficacy of clarithromycin-based regimens for the treatment of Helicobacter pylori infection. Therap Adv Gastroenterol 2023; 16:17562848231167284. [PMID: 37388121 PMCID: PMC10302680 DOI: 10.1177/17562848231167284] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/23/2022] [Accepted: 03/15/2023] [Indexed: 07/01/2023] Open
Abstract
Background Helicobacter pylori eradication rates achieved with clarithromycin-based triple therapies are declining due to antibiotic resistance, but data regarding temporal changes in efficacy with these eradication therapies are scarce. Objective To evaluate the efficacy of clarithromycin-based triple eradication regimens over time. Design A comprehensive literature review and time-trend analysis. Data sources and methods Bibliographies of recently published systematic literature reviews were searched and supplemented with a targeted literature review conducted using Medline and Embase databases and ProQuest from conception to May 2021. Studies reporting H. pylori eradication rates of clarithromycin-based triple therapies were included and temporal trends were estimated using a random-effects model. Results Eradication rates for triple therapies containing proton pump inhibitors (PPIs), clarithromycin, and amoxicillin showed a significant decline over the past 23 years (p = 0.0315). However, this decline was not significant when eradication rates achieved with vonoprazan-based triple therapy were included (p = 0.3910). Conclusion Vonoprazan-based triple therapy partially mitigated the decline in eradication rates seen with PPI-based triple therapy, likely due to more powerful acid suppression of vonoprazan.
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Affiliation(s)
- Steven F. Moss
- Division of Gastroenterology, Alpert Medical School of Brown University, 222 Richmond St, Providence, RI 02903, USA
| | - William D. Chey
- Division of Gastroenterology, University of Michigan Health System, Ann Arbor, MI, USA
| | | | | | - Rinu Jacob
- Phathom Pharmaceuticals, Florham Park, NJ, USA
| | | | | | | | - Peter Malfertheiner
- Department of Gastroenterology, Hepatology and Infectious Diseases, Otto von Guericke University, Magdeburg, Germany
- LMU Medizinische Klinik und Poliklinik II, Muenchen, Germany
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Malfertheiner P, Moss SF, Daniele P, Pelletier C, Jacob R, Tremblay G, Hubscher E, Leifke E, Chey WD. Potassium-Competitive Acid Blocker and Proton Pump Inhibitor-Based Regimens for First-Line Helicobacter pylori Eradication: A Network Meta-Analysis. GASTRO HEP ADVANCES 2022; 1:824-834. [PMID: 39131848 PMCID: PMC11307524 DOI: 10.1016/j.gastha.2022.06.009] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/20/2022] [Accepted: 06/13/2022] [Indexed: 08/13/2024]
Abstract
Background and Aims Effective acid suppression is a crucial component of Helicobacter pylori (H. pylori) eradication regimens. Approved treatments include dual, triple, and quadruple therapies composed of certain antibiotics in combination with proton pump inhibitors (PPIs). Vonoprazan, a potassium-competitive acid blocker, provides more potent and durable acid suppression than PPIs. We compared the efficacy of vonoprazan-based therapies vs approved standard regimens using new evidence from the phase 3 pHalconHP trial in North America and Europe. Methods Studies reporting first-line H. pylori eradication rates from empiric treatment with Food and Drug Administration-approved therapies and vonoprazan-containing therapies were identified via bibliographic searches of systematic literature reviews and a subsequent MEDLINE/Embase search using index terms for H. pylori and eradication. Randomized controlled trials comparing 2 or more relevant comparators were included in Bayesian network meta-analyses for grouped and distinct therapies. Results Twenty-three distinct regimens from 42 trials including 12,773 patients were identified. Vonoprazan-based triple therapy showed the highest relative efficacy (odds ratio: 2.73, 95% credible interval 2.11, 3.54) and 72.1% probability of being the best. North American, Western, and global scenarios were largely consistent. Vonoprazan-based therapies demonstrated higher odds of H. pylori eradication than each PPI-based triple therapy. Furthermore, vonoprazan-based triple therapy was superior to bismuth subcitrate quadruple therapy (odds ratio: 1.60, 95% credible interval: 1.07, 2.38). Conclusion Vonoprazan-based eradication regimens represent novel treatments for H. pylori infection on a global scale, offering efficacy that, in this analysis, is superior to PPI-based triple therapy and comparable or better than bismuth quadruple therapy.
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Affiliation(s)
- Peter Malfertheiner
- Department of Gastroenterology, Hepatology and Infectious Diseases, Otto v. Guericke University, Magdeburg, Germany
- LMU Medizinische Klinik und Poliklinik II, Muenchen, Germany
| | - Steven F. Moss
- Division of Gastroenterology, Alpert Medical School of Brown University, Providence, Rhode Island
| | - Patrick Daniele
- Real World and Advanced Analytics, Cytel, Inc, Waltham, Massachusetts
| | | | - Rinu Jacob
- Phathom Pharmaceuticals, Florham Park, New Jersey
| | - Gabriel Tremblay
- Real World and Advanced Analytics, Cytel, Inc, Waltham, Massachusetts
| | | | | | - William D. Chey
- Division of Gastroenterology, University of Michigan Health System, Ann Arbor, Michigan
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Yu J, Yang P, Qin X, Li C, Lv Y, Wang X. Impact of smoking on the eradication of Helicobacter pylori. Helicobacter 2022; 27:e12860. [PMID: 34708484 DOI: 10.1111/hel.12860] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/11/2021] [Revised: 10/11/2021] [Accepted: 10/13/2021] [Indexed: 12/13/2022]
Abstract
BACKGROUND AND AIM Although the association between the eradication of Helicobacter pylori (H. pylori) and smoking has been confirmed through a meta-analysis, many new studies have reported inconsistent conclusions. An up-to-date meta-analysis based on published relevant studies was conducted in this study to address this issue. METHODS Eligible studies up to January 2021 were screened and retrieved using PubMed and Web of Science as well as by performing a manual review of references. We calculated the pooled odd ratios (OR) with the 95% confidence interval (CI). Subgroup and sensitivity analyses were also performed. Begg's test was used to determine the publication bias. RESULTS In total, 39 studies were included in the meta-analysis. The results showed that smoking increases the failure rate of H. pylori eradication treatment (OR = 1.70, 95%CI, 1.49-1.93). The risk of failure also increases with an increase in the smoking dose (>5 cigarettes per day) (OR = 2.59, 95%CI, 1.28-5.24) and the current smoking status (continued to smoke during treatment) (OR = 2.49, 95%CI, 1.52-4.06). Studies with a large proportion of patients with peptic ulcer (OR = 2.14, 95%CI, 1.51-3.02) revealed a higher failure rate among smokers than those with a low proportion of patients with peptic ulcer (OR = 1.57, 95%CI, 1.36-1.81). When vonoprazan (VPZ) was used to treat H. pylori infection, smoking did not affect the eradication rate (OR = 0.94, 95%CI, 0.51-1.75). CONCLUSION Smoking increases the failure rate of H. pylori eradication treatment. The risk of H. pylori eradication failure in smokers increases with a current smoking status and a high smoking dose. However, when VPZ is used to treat the H. pylori infection, smoking has no effect on the eradication rate.
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Affiliation(s)
- Jing Yu
- Department of Gastroenterology, The Affiliated Changzhou No. 2 People's Hospital of Nanjing Medical University, Changzhou, Jiangsu Province, China.,Graduate school, Dalian Medical University, Dalian, Liaoning Province, China
| | - Peng Yang
- Department of Gastroenterology, The Affiliated Changzhou No. 2 People's Hospital of Nanjing Medical University, Changzhou, Jiangsu Province, China.,Graduate school, Dalian Medical University, Dalian, Liaoning Province, China
| | - Xiangrong Qin
- Department of Gastroenterology, The Affiliated Changzhou No. 2 People's Hospital of Nanjing Medical University, Changzhou, Jiangsu Province, China
| | - Chunjian Li
- Department of Gastroenterology, The Affiliated Changzhou No. 2 People's Hospital of Nanjing Medical University, Changzhou, Jiangsu Province, China
| | - Yiming Lv
- Department of Gastroenterology, The Affiliated Changzhou No. 2 People's Hospital of Nanjing Medical University, Changzhou, Jiangsu Province, China
| | - Xiaoyong Wang
- Department of Gastroenterology, The Affiliated Changzhou No. 2 People's Hospital of Nanjing Medical University, Changzhou, Jiangsu Province, China
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Rokkas T, Gisbert JP, Malfertheiner P, Niv Y, Gasbarrini A, Leja M, Megraud F, O'Morain C, Graham DY. Comparative Effectiveness of Multiple Different First-Line Treatment Regimens for Helicobacter pylori Infection: A Network Meta-analysis. Gastroenterology 2021; 161:495-507.e4. [PMID: 33839101 DOI: 10.1053/j.gastro.2021.04.012] [Citation(s) in RCA: 89] [Impact Index Per Article: 29.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/02/2021] [Revised: 03/27/2021] [Accepted: 04/05/2021] [Indexed: 02/07/2023]
Abstract
BACKGROUND & AIMS A number of double, triple, and quadruple therapies have been proposed as first-line empiric treatments for Helicobacter pylori infection. However, knowledge of their worldwide and regional comparative efficacy is lacking. We examined the comparative effectiveness of all empirically used first-line regimens tested against standard triple treatment using a network meta-analysis of published randomized controlled trials. METHODS Data extracted from eligible randomized controlled trials were entered into a Bayesian network meta-analysis to investigate the comparative efficacy of H pylori infection empiric first-line regimens and to explore their effectiveness rank order. The ranking probability for each regimen was evaluated by means of surfaces under cumulative ranking values. RESULTS Sixty-eight eligible randomized controlled trials were included, giving a total of 92 paired comparisons with 22,975 patients randomized to 8 first-line regimens. The overall results showed that only vonoprazan triple therapy and reverse hybrid therapy achieved cure rates of >90%. Levofloxacin triple therapy performed best in Western countries (eradication rate 88.5%). The comparative effectiveness ranking showed that vonoprazan triple therapy had the best results, whereas standard triple therapy was the least efficacious regimen (surfaces under cumulative ranking 92.4% vs 4.7% respectively; odds ratio, 3.80; 95% credible interval, 1.62-8.94). CONCLUSIONS For first-line empiric treatment of H pylori infection, vonoprazan triple therapy and reverse hybrid therapy achieved high eradication rates of >90%. Levofloxacin triple therapy achieved the highest eradication rates in Western countries. Standard triple therapy was the least efficacious regimen in this network meta-analysis.
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Affiliation(s)
- Theodore Rokkas
- Gastroenterology Clinic, Henry Dunant Hospital, Athens, Greece; Medical School, European University of Cyprus, Nicosia, Cyprus.
| | - Javier P Gisbert
- Gastroenterology Department, Hospital Universitario de La Princesa, Instituto de Investigación Sanitaria Princesa, Universidad Autónoma de Madrid, Madrid, Spain; Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas, Madrid, Spain
| | - Peter Malfertheiner
- Ludwig Maximilian Universität, Med Klinik II, München, Otto v Guericke Universität, Magdeburg, Germany
| | - Yaron Niv
- Ariel University, Ministry of Health, Ariel, Israel
| | - Antonio Gasbarrini
- Medicina Interna e Gastroenterologia, Fondazione Policlinico Universitario A. Gemelli Istituto Di Ricovero E Cura A Carattere Scientifico, Universita Cattolica Del Sacro Cuore, Roma, Italy
| | - Marcis Leja
- Institute of Clinical and Preventive Medicine and Faculty of Medicine, University of Latvia, Riga, Latvia
| | - Francis Megraud
- Inserm U1053, Université de Bordeaux and Laboratoire de Bactétiologie, Hôpital Pellegrin, Bordeaux, France
| | - Colm O'Morain
- Gastroenterology Clinic, Trinity College Dublin, Dublin, Ireland
| | - David Y Graham
- Department of Medicine, Michael E. DeBakey Veterans Affairs Medical Center and Baylor College of Medicine, Houston, Texas
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Kim SY, Chung JW. Best Helicobacter pylori Eradication Strategy in the Era of Antibiotic Resistance. Antibiotics (Basel) 2020; 9:antibiotics9080436. [PMID: 32717826 PMCID: PMC7459868 DOI: 10.3390/antibiotics9080436] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2020] [Revised: 07/11/2020] [Accepted: 07/21/2020] [Indexed: 02/06/2023] Open
Abstract
Antibiotic resistance is the major reason for Helicobacter pylori treatment failure, and the increasing frequency of antibiotic resistance is a challenge for clinicians. Resistance to clarithromycin and metronidazole is a particular problem. The standard triple therapy (proton pump inhibitor, amoxicillin, and clarithromycin) is no longer appropriate as the first-line treatment in most areas. Recent guidelines for the treatment of H. pylori infection recommend a quadruple regimen (bismuth or non-bismuth) as the first-line therapy. This treatment strategy is effective for areas with high resistance to clarithromycin or metronidazole, but the resistance rate inevitably increases as a result of prolonged therapy with multiple antibiotics. Novel potassium-competitive acid blocker-based therapy may be effective, but the data are limited. Tailored therapy based on antimicrobial susceptibility test results is ideal. This review discussed the current important regimens for H. pylori treatment and the optimum H. pylori eradication strategy.
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Affiliation(s)
- Su Young Kim
- Divison of Gastroenterology, Department of Internal Medicine, Yonsei University Wonju College of Medicine, 20 Ilsan-ro, Wonju 26426, Korea;
| | - Jun-Won Chung
- Divison of Gastroenterology, Department of Internal Medicine, Gachon University, Gil Medical Center, 21, Namdong-daero 774beon-gil, Namdong-gu, Incheon 21565, Korea
- Correspondence: ; Tel.: +82-32-460-3778; Fax: +82-32-460-3408
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Abstract
As one of the most prevalent infections globally, Helicobacter pylori (H. pylori) continues to present diagnostic and therapeutic challenges for clinicians worldwide. Diagnostically, the "test-and-treat" strategy is the recommended approach for healthcare practitioners when managing this potentially curable disease. The choice of testing method should be based on several factors including patient age, presenting symptoms, and medication use, as well as test reliability, availability, and cost. With rising antibiotic resistance, particularly of macrolides, care must be taken to ensure that therapy is selected based on regional resistance patterns and prior antibiotic exposure. In the USA, macrolide antibiotic resistance rates in some areas have reached or exceeded a generally accepted threshold, such that clarithromycin triple therapy may no longer be an appropriate first-line empiric treatment. Instead, bismuth quadruple therapy should be considered, while levofloxacin-based or alternative macrolide-containing therapies are also options. Once treated, it is essential to test for eradication as untreated H. pylori is associated with serious complications including peptic ulcer disease, mucosa-associated lymphoid tissue lymphoma, and gastric cancer. This review article aims to consolidate current knowledge of H. pylori infection with a particular emphasis on diagnostic and treatment strategies.
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Affiliation(s)
- Bernardo Guevara
- Department of Internal Medicine, University of California Davis School of Medicine, 4150 V Street, Suite 1100, Sacramento, CA, 95817, USA
| | - Asha Gupta Cogdill
- Division of Gastroenterology and Hepatology, UC Davis Medical Center, University of California Davis School of Medicine, 4150 V Street, Suite 3500, Sacramento, CA, 95817, USA.
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Lee SM, Kim N, Kwon YH, Nam RH, Kim JM, Park JY, Lee YS, Lee DH. rdxA, frxA, and efflux pump in metronidazole-resistant Helicobacter pylori: Their relation to clinical outcomes. J Gastroenterol Hepatol 2018; 33:681-688. [PMID: 28748532 DOI: 10.1111/jgh.13906] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/03/2017] [Revised: 07/19/2017] [Accepted: 07/21/2017] [Indexed: 01/06/2023]
Abstract
BACKGROUND AND AIM rdxA and frxA mutations and enhancement of efflux pump have been suggested as the cause of metronidazole resistance in Helicobacter pylori. This study was performed to investigate the resistance mechanisms related to clinical eradication outcome, and to examine direct involvement of hefA in metronidazole-resistant isolates with intact rdxA and frxA. METHODS A total of 53 H. pylori-positive patients who were treated with metronidazole-containing sequential or quadruple therapy from 2011 to 2015 were enrolled. The metronidazole susceptibility of H. pylori isolates was examined by agar dilution test. Mutations in rdxA and frxA, were analyzed with DNA sequencing, and impact of hefA on metronidazole resistance was examined with quantitative real-time reverse transcription polymerase chain reaction, knockout and genetic complementation test for hefA. RESULTS Seven mutation types of rdxA and/or frxA were found in H. pylori isolated from non-eradicated subjects. rdxA mutation was associated with eradication failure (P = 0.002), and nonsense mutation in rdxA reduced eradication efficacy (P = 0.009). hefA expression was significantly higher in resistant isolates (P < 0.001), especially in rdxA(-)frxA(-) as compared to rdxA(+)frxA(+) (P = 0.027). Resistant isolates with no mutation in rdxA and frxA became susceptible after hefA knockout. Genetic complementation for hefA recovered metronidazole resistance in all of three hefA knockout mutants. CONCLUSIONS These results suggest that rdxA mutations play a critical role in metronidazole resistance as well as the outcomes of eradication therapy. In addition, hefA seems to be directly involved in metronidazole resistance, which explains the resistance in clinical isolates with intact rdxA and frxA.
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Affiliation(s)
- Sun Min Lee
- Department of Internal Medicine, Seoul National University Bundang Hospital, Seongnam, Gyeonggi-do, Korea
| | - Nayoung Kim
- Department of Internal Medicine, Seoul National University Bundang Hospital, Seongnam, Gyeonggi-do, Korea.,Department of Internal Medicine and Liver Research Institute, Seoul National University College of Medicine, Seoul, Korea
| | - Yong Hwan Kwon
- Department of Internal Medicine, Seoul National University Bundang Hospital, Seongnam, Gyeonggi-do, Korea
| | - Ryoung Hee Nam
- Department of Internal Medicine, Seoul National University Bundang Hospital, Seongnam, Gyeonggi-do, Korea
| | - Jung Mogg Kim
- Department of Microbiology, Hanyang University School of Medicine, Seoul, Korea
| | - Jong Youn Park
- School of Pharmacy, MCPHS University, Boston, Massachusetts, USA
| | - Yeon Suk Lee
- University of New South Wales, Sydney, New South Wales, Australia
| | - Dong Ho Lee
- Department of Internal Medicine, Seoul National University Bundang Hospital, Seongnam, Gyeonggi-do, Korea
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Sapmaz F, Kalkan IH, Atasoy P, Basyigit S, Guliter S. A Non-Inferiority Study: Modified Dual Therapy Consisting Higher Doses of Rabeprazole Is as Successful as Standard Quadruple Therapy in Eradication of Helicobacter pylori. Am J Ther 2017; 24:e393-e398. [DOI: 10.1097/mjt.0000000000000316] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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Comparing the efficacy of four different protocols for eradicating of Helicobacter pylori infection in Ahvaz, southwest Iran. GASTROENTEROLOGY REVIEW 2015; 10:94-9. [PMID: 26557940 PMCID: PMC4631277 DOI: 10.5114/pg.2015.49001] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/06/2014] [Revised: 09/21/2014] [Accepted: 10/11/2014] [Indexed: 12/15/2022]
Abstract
Introduction Helicobacter pylori (H. pylori) is the common cause of many gastrointestinal diseases, especially peptic ulcer. Therefore, a successful treatment of this infection decreases the financial burden on health systems. Aim Different combinations of antibiotics are used for the eradication of this bacterium worldwide. The goal of this study is to compare the efficacy of four different protocols used for this purpose in Ahvaz. Material and methods A total number of 400 patients with H. pylori infection were randomly divided into four groups (100 in each): (1) OAC: omeprazole (20 mg/b.i.d.), amoxicillin (1000 mg/b.i.d.), clarithromycin (500 mg/b.i.d.) for 10 days. (2) OCF: omeprazole (20 mg/b.i.d.), ciprofloxacin (500 mg/b.i.d.), furazolidone (100 mg/b.i.d.) for 10 days. (3) OBAM: omeprazole (20 mg/b.i.d.), bismuth subcitrate (240 mg/b.i.d.), amoxicillin (1000 mg/b.i.d.), metronidazol (500 mg/b.i.d.) for 14 days. (4) OBTM: omeprazole (20 mg/b.i.d.), bismuth subcitrate (240 mg/b.i.d.), tetracycline (500 mg/b.i.d.), metronidazol (500 mg/b.i.d.) for 14 days. At the end the viability of the bacterium was assessed by C14 urea breath test. Results The rate of H. pylori eradication was 92%, 59%, 73%, and 76% in OAC, OCF, OBAM, and OBTM groups, respectively (based on intention to treat analysis). The eradication rate was 93.9%, 62.1%, 77.7%, and 84.4% in OAC, OCF, OBAM, and OBTM groups, respectively (based on per protocol analysis). There was a statistically significant increase in eradication rate in the OAC group in comparison with the others (p < 0.001). Conclusions Standard triple therapy (omeprazole, amoxicillin, clarithromycin) remains the most effective regimen for H. pylori eradication in Ahvaz.
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Nieuwlaat R, Wilczynski N, Navarro T, Hobson N, Jeffery R, Keepanasseril A, Agoritsas T, Mistry N, Iorio A, Jack S, Sivaramalingam B, Iserman E, Mustafa RA, Jedraszewski D, Cotoi C, Haynes RB. Interventions for enhancing medication adherence. Cochrane Database Syst Rev 2014; 2014:CD000011. [PMID: 25412402 PMCID: PMC7263418 DOI: 10.1002/14651858.cd000011.pub4] [Citation(s) in RCA: 692] [Impact Index Per Article: 69.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
BACKGROUND People who are prescribed self administered medications typically take only about half their prescribed doses. Efforts to assist patients with adherence to medications might improve the benefits of prescribed medications. OBJECTIVES The primary objective of this review is to assess the effects of interventions intended to enhance patient adherence to prescribed medications for medical conditions, on both medication adherence and clinical outcomes. SEARCH METHODS We updated searches of The Cochrane Library, including CENTRAL (via http://onlinelibrary.wiley.com/cochranelibrary/search/), MEDLINE, EMBASE, PsycINFO (all via Ovid), CINAHL (via EBSCO), and Sociological Abstracts (via ProQuest) on 11 January 2013 with no language restriction. We also reviewed bibliographies in articles on patient adherence, and contacted authors of relevant original and review articles. SELECTION CRITERIA We included unconfounded RCTs of interventions to improve adherence with prescribed medications, measuring both medication adherence and clinical outcome, with at least 80% follow-up of each group studied and, for long-term treatments, at least six months follow-up for studies with positive findings at earlier time points. DATA COLLECTION AND ANALYSIS Two review authors independently extracted all data and a third author resolved disagreements. The studies differed widely according to medical condition, patient population, intervention, measures of adherence, and clinical outcomes. Pooling results according to one of these characteristics still leaves highly heterogeneous groups, and we could not justify meta-analysis. Instead, we conducted a qualitative analysis with a focus on the RCTs with the lowest risk of bias for study design and the primary clinical outcome. MAIN RESULTS The present update included 109 new RCTs published since the previous update in January 2007, bringing the total number of RCTs to 182; we found five RCTs from the previous update to be ineligible and excluded them. Studies were heterogeneous for patients, medical problems, treatment regimens, adherence interventions, and adherence and clinical outcome measurements, and most had high risk of bias. The main changes in comparison with the previous update include that we now: 1) report a lack of convincing evidence also specifically among the studies with the lowest risk of bias; 2) do not try to classify studies according to intervention type any more, due to the large heterogeneity; 3) make our database available for collaboration on sub-analyses, in acknowledgement of the need to make collective advancement in this difficult field of research. Of all 182 RCTs, 17 had the lowest risk of bias for study design features and their primary clinical outcome, 11 from the present update and six from the previous update. The RCTs at lowest risk of bias generally involved complex interventions with multiple components, trying to overcome barriers to adherence by means of tailored ongoing support from allied health professionals such as pharmacists, who often delivered intense education, counseling (including motivational interviewing or cognitive behavioral therapy by professionals) or daily treatment support (or both), and sometimes additional support from family or peers. Only five of these RCTs reported improvements in both adherence and clinical outcomes, and no common intervention characteristics were apparent. Even the most effective interventions did not lead to large improvements in adherence or clinical outcomes. AUTHORS' CONCLUSIONS Across the body of evidence, effects were inconsistent from study to study, and only a minority of lowest risk of bias RCTs improved both adherence and clinical outcomes. Current methods of improving medication adherence for chronic health problems are mostly complex and not very effective, so that the full benefits of treatment cannot be realized. The research in this field needs advances, including improved design of feasible long-term interventions, objective adherence measures, and sufficient study power to detect improvements in patient-important clinical outcomes. By making our comprehensive database available for sharing we hope to contribute to achieving these advances.
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Affiliation(s)
- Robby Nieuwlaat
- McMaster UniversityDepartment of Clinical Epidemiology and BiostatisticsHamilton General Hospital campus, Room C3‐107237 Barton Street EastHamiltonONCanadaL8L 2X2
| | - Nancy Wilczynski
- McMaster UniversityDepartment of Clinical Epidemiology and BiostatisticsHamilton General Hospital campus, Room C3‐107237 Barton Street EastHamiltonONCanadaL8L 2X2
| | - Tamara Navarro
- McMaster UniversityDepartment of Clinical Epidemiology and BiostatisticsHamilton General Hospital campus, Room C3‐107237 Barton Street EastHamiltonONCanadaL8L 2X2
| | - Nicholas Hobson
- McMaster UniversityDepartment of Clinical Epidemiology and BiostatisticsHamilton General Hospital campus, Room C3‐107237 Barton Street EastHamiltonONCanadaL8L 2X2
| | - Rebecca Jeffery
- McMaster UniversityDepartment of Clinical Epidemiology and BiostatisticsHamilton General Hospital campus, Room C3‐107237 Barton Street EastHamiltonONCanadaL8L 2X2
| | - Arun Keepanasseril
- McMaster UniversityDepartments of Clinical Epidemiology & Biostatistics, and Medicine, Faculty of Health Sciences1280 Main Street WestHamiltonONCanadaL8S 4L8
| | - Thomas Agoritsas
- McMaster UniversityDepartment of Clinical Epidemiology and BiostatisticsHamilton General Hospital campus, Room C3‐107237 Barton Street EastHamiltonONCanadaL8L 2X2
| | - Niraj Mistry
- St. Michael's HospitalDepartment of Pediatrics30 Bond StreetTorontoONCanadaM5B 1W8
| | - Alfonso Iorio
- McMaster UniversityDepartment of Clinical Epidemiology and BiostatisticsHamilton General Hospital campus, Room C3‐107237 Barton Street EastHamiltonONCanadaL8L 2X2
| | - Susan Jack
- McMaster UniversitySchool of Nursing, Faculty of Health SciencesHealth Sciences CentreRoom 2J32, 1280 Main Street WestHamiltonONCanadaL8S 4K1
| | | | - Emma Iserman
- McMaster UniversityDepartment of Clinical Epidemiology and BiostatisticsHamilton General Hospital campus, Room C3‐107237 Barton Street EastHamiltonONCanadaL8L 2X2
| | - Reem A Mustafa
- McMaster UniversityDepartment of Clinical Epidemiology and BiostatisticsHamilton General Hospital campus, Room C3‐107237 Barton Street EastHamiltonONCanadaL8L 2X2
| | - Dawn Jedraszewski
- McMaster UniversityDepartment of Clinical Epidemiology and BiostatisticsHamilton General Hospital campus, Room C3‐107237 Barton Street EastHamiltonONCanadaL8L 2X2
| | - Chris Cotoi
- McMaster UniversityDepartment of Clinical Epidemiology and BiostatisticsHamilton General Hospital campus, Room C3‐107237 Barton Street EastHamiltonONCanadaL8L 2X2
| | - R. Brian Haynes
- McMaster UniversityDepartments of Clinical Epidemiology & Biostatistics, and Medicine, Faculty of Health Sciences1280 Main Street WestHamiltonONCanadaL8S 4L8
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Sierra F, Forero J, Rey M. Ideal treatment for Helicobacter pylori: A systematic review. REVISTA DE GASTROENTEROLOGÍA DE MÉXICO (ENGLISH EDITION) 2014. [DOI: 10.1016/j.rgmxen.2014.05.001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
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Sierra F, Forero JD, Rey M. [Ideal treatment for Helicobacter pylori: a systematic review]. REVISTA DE GASTROENTEROLOGÍA DE MÉXICO 2013; 79:28-49. [PMID: 24365458 DOI: 10.1016/j.rgmx.2013.03.003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/14/2012] [Revised: 03/27/2013] [Accepted: 03/29/2013] [Indexed: 12/17/2022]
Abstract
BACKGROUND The success rates of therapies for treating Helicobacter pylori vary greatly worldwide and the ideal treatment has yet to be clearly established. AIMS A systematic review was carried out to evaluate the effectiveness of current first and second-line therapies in treating H.pylori infection. METHODS Two researchers independently carried out Internet search engine reviews (PUBMED, EMBASE, MEDLINE) of clinical trials on adults published between 1990 and 2012 in both English and Spanish. RESULTS Forty-three (n=8,123) clinical trials were evaluated that included first and second-line triple, quadruple, and sequential therapies. The eradication rates of the standard triple therapy are unacceptable (≤80%) in countries where H.pylori is highly resistant to clarithromycin and metronidazole. Administration of the standard triple therapy for more than 7 days does not improve its effectiveness. No statistically significant differences were observed between the eradication rates of the quadruple therapy with bismuth and the standard triple therapy. Even though the sequential and concomitant therapies are equally successful regimens, the triple therapy with levofloxacin offers the best results as first and second-line treatment, but quinolone resistance can diminish its effectiveness. The triple therapy with levofloxacin and the sequential and concomitant treatments were superior to the standard triple regimen as first-line therapy. CONCLUSIONS Currently there is no ideal first or second-line treatment for achieving 100% eradication. The therapeutic order should be carried out according to the initial treatment and local antimicrobial resistance studies.
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Affiliation(s)
- F Sierra
- División de Gastroenterología y Hepatología, Hospital Universitario Fundación Santa Fe de Bogotá, Bogotá, Colombia; Facultad de Medicina, Universidad de los Andes, Bogotá, Colombia.
| | - J D Forero
- División de Gastroenterología y Hepatología, Hospital Universitario Fundación Santa Fe de Bogotá, Bogotá, Colombia; Facultad de Medicina, Universidad de los Andes, Bogotá, Colombia.
| | - M Rey
- División de Gastroenterología y Hepatología, Hospital Universitario Fundación Santa Fe de Bogotá, Bogotá, Colombia; Facultad de Medicina, Universidad de los Andes, Bogotá, Colombia
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Georgopoulos SD, Xirouchakis E, Martinez-Gonzalez B, Sgouras DN, Spiliadi C, Mentis AF, Laoudi F. Clinical evaluation of a ten-day regimen with esomeprazole, metronidazole, amoxicillin, and clarithromycin for the eradication of Helicobacter pylori in a high clarithromycin resistance area. Helicobacter 2013; 18:459-67. [PMID: 23714140 DOI: 10.1111/hel.12062] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
BACKGROUND Increasing clarithromycin resistance reduces Helicobacter pylori eradication rates with conventional triple regimens. We evaluated effectiveness and safety of a 10-day-quadruple nonbismuth containing regimen, as first-line treatment or second-line treatment (after conventional triple) for H. pylori, and assessed impact of antibiotic resistance on treatment success. MATERIALS AND METHODS Eligible patients had upper GI endoscopy and positive CLO-test, also confirmed by histology and/or culture. The eradication scheme comprised: Esomeprazole 40 mg, Metronidazole 500 mg, Amoxicillin 1000 mg, and Clarithromycin 500 mg, twice daily, for 10 days. Treatment adherence and adverse effects were recorded. Eradication was tested by (13) C-urea breath test or histology. RESULTS One hundred and ninety out of 198 patients (115M/83F, aged 18-81, mean 52 years, 37% smokers, 27% ulcer disease) who completed the study protocol were evaluated for eradication. Adherence to treatment was 97.7% (95% CI 95.9-99.6). Six (3.2%) patients experienced severe side effects and discontinued treatment. Intention to treat and per protocol analysis in first line was 91.5% (95% CI 86.2-94.8) and 95% (95% CI 90.4-97.4) and in second line was 60.6% (95% CI 43.6-75.3) and 64.5% (95% CI 46.9-78.8), respectively. Antibiotic susceptibility tests were performed in 106 of 124 (85%) patients who gave consent. Among them 42 (40%) harbored clarithromycin resistant strains. Eradication rates were significantly higher in sensitive and single clarithromycin or metronidazole resistant (37/37, 100% and 43/47, 91%) than in dual resistant strains (12/22, 55%) (p < .0001). Specifically, concomitant regimen eradicated 7/10, 70% of dual resistant strains as first-line treatment and 5/12, 42% as second-line treatment. Multivariate analysis showed that dual resistance was the only independent significant predictor of treatment failure. CONCLUSIONS The 10-days "concomitant" regimen is effective and safe first-line H. pylori treatment, in a high clarithromycin resistance area, although dual antibiotic resistance may compromise its effectiveness.
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Affiliation(s)
- Sotirios D Georgopoulos
- Gastroenterology and Hepatology Department, Athens Medical, P. Faliron General Hospital, Athens, Greece
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Georgopoulos SD, Papastergiou V, Karatapanis S. Current options for the treatment of Helicobacter pylori. Expert Opin Pharmacother 2013; 14:211-23. [PMID: 23331077 DOI: 10.1517/14656566.2013.763926] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
INTRODUCTION Treatment of Helicobacter pylori (H. pylori) infection is crucial for prevalent disease's management, including gastritis, peptic ulcer and gastric cancer, whereas novel extradigestive causal associations are increasingly being recognized. Despite long-standing efforts, there is not as yet an optimal empirical therapy to eradicate H. pylori. AREAS COVERED In the present article the authors review current options for H. pylori eradication. Advantages and disadvantages of each of the recommended regimens, and the perspectives for their rational use in clinical practice, are critically discussed. EXPERT OPINION The continuous rising of antimicrobial resistance has accounted for the declined efficiency of standard triple therapies, yielding < 70% eradication in most countries. Alternative first-line strategies have been proposed and largely validated and are now replacing standard-of-care therapies in areas with a high incidence of clarithromycin-resistance (> 20%). Such treatments include the bismuth-containing quadruple therapy, concomitant, sequential and levofloxacin-based regimens, the later mainly designated, together with rifabutin-based therapies as second-line/rescue options. Clinicians should be aware of the local resistance pattern and maintain first-line eradication to levels > 90% (per-protocol efficacy). This will prevent both exposing the patient to repeated treatments and spreading of secondary antimicrobial resistance. In the future, perspectives of tailored therapy and a prophylactic vaccine will obviate any treatment concern.
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Affiliation(s)
- Sotirios D Georgopoulos
- Athens Medical, P. Faliron General Hospital, Department of Gastroenterology, 17562 Athens, Greece.
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Nonbismuth quadruple "concomitant" therapy versus standard triple therapy, both of the duration of 10 days, for first-line H. pylori eradication: a randomized trial. J Clin Gastroenterol 2013; 47:228-32. [PMID: 22858517 DOI: 10.1097/mcg.0b013e31826015b0] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
GOALS To compare the efficacy, compliance, and tolerability of a quadruple, nonbismuth-containing concomitant therapy with standard triple therapy, both of the duration of 10 days, for Helicobacter pylori eradication. BACKGROUND Eradication rates obtained with standard therapies are declining as antibiotic resistance becomes more prevalent worldwide. New first-line treatment strategies are needed. STUDY Two hundred fifty-seven patients with H. pylori infection were included in the study. Patients were randomized to receive 10-day concomitant therapy comprising esomeprazole 40 mg, amoxicillin 1000 mg, clarithromycin 500 mg, and metronidazole 500 mg, all bid, or 10-day standard triple therapy comprising of esomeprazole 40 mg, amoxicillin 1000 mg, and clarithromycin 500 mg, all bid. Cure rates were defined as a negative 13C urea breath test 8 weeks after the start of treatment. RESULTS Two hundred forty-six patients completed the study. The intention-to-treat cure rates were 90.5% [95% confidence interval (CI): 84.1%-95%] and 73.8% (95%CI, 65.6%-80.7%), whereas the per protocol cure rates were 93.3% (95%CI, 87.2% -97.1%) and 78.5% (95%CI, 70.3%-84.9%), respectively. The eradication rate was significantly higher in the concomitant group compared with the triple therapy group in both the intention-to-treat (P=0.0006) and per protocol (P=0.0014) populations. Adverse events were generally of mild/moderate intensity and did not interfere significantly with compliance, which was excellent for both treatment groups (96.6% and 98.5%, respectively, P=0.44). CONCLUSIONS Performance of a 10-day conventional triple regimen is suboptimal. A 10-day concomitant regimen achieved a significantly higher eradication rate and seems to be an effective, safe, and well-tolerated treatment option for H. pylori eradication.
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Yoon JH, Baik GH, Kim YS, Suk KT, Shin WG, Kim KH, Kim KO, Park CH, Baik IH, Jang HJ, Kim JB, Kae SH, Kim DJ, Kim HY. Comparison of the Eradication Rate between 1- and 2-Week Bismuth-Containing Quadruple Rescue Therapies for Helicobacter pylori Eradication. Gut Liver 2012; 6:434-9. [PMID: 23170146 PMCID: PMC3493722 DOI: 10.5009/gnl.2012.6.4.434] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/13/2012] [Accepted: 02/06/2011] [Indexed: 12/19/2022] Open
Abstract
Background/Aims First-line therapies against Helicobacter pylori, including proton pump inhibitors (PPIs) plus two antibiotics, may fail in up to 20% of patients. 'Rescue' therapy is usually needed for patients who failed the first-line treatment. This study evaluated the eradication rate of bismuth-containing quadruple rescue therapy over a 1- or 2-week period. Methods We prospectively investigated 169 patients with a persistent H. pylori infection after the first-line triple therapy, which was administered from October 2008 to March 2010. The patients were randomized to receive a 1- or 2-week quadruple rescue therapy (pantoprazole 40 mg b.i.d., tripotassium dicitrate bismuthate 300 mg q.i.d., metronidazole 500 mg t.i.d., and tetracycline 500 mg q.i.d.). After the 'rescue' therapy, the eradication rate, compliance, and adverse events were evaluated. Results The 1-week group achieved 83.5% (71/85) and 87.7% (71/81) eradication rates in the intention to treat (ITT) and per-protocol (PP) analyses, respectively. The 2-week group obtained 87.7% (72/84) and 88.9% (72/81) eradication rate in the ITT and PP analyses, respectively. There was no significant difference in the eradication rate, patient compliance or rate of adverse events between the two groups. Conclusions One-week bismuth-containing quadruple therapy can be as effective as a 2-week therapy after the failure of the first-line eradication therapy.
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Affiliation(s)
- Jai Hoon Yoon
- Department of Internal Medicine, Hallym University Chuncheon Sacred Heart Hospital, Hallym University College of Medicine, Chuncheon, Korea
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Helicobacter pylori Eradication Therapies in the Era of Increasing Antibiotic Resistance: A Paradigm Shift to Improved Efficacy. Gastroenterol Res Pract 2012; 2012:757926. [PMID: 22778723 PMCID: PMC3388348 DOI: 10.1155/2012/757926] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/03/2012] [Accepted: 05/08/2012] [Indexed: 12/13/2022] Open
Abstract
With the rising prevalence of antimicrobial resistance, the eradication rates of Helicobacter pylori (H. pylori) with standard treatments are decreasing to unacceptable levels (i.e., ≤80%) in most countries. After these disappointing results, several authorities have proposed that infection with H. pylori should be approached and treated as any other bacterial infectious disease. This implicates that clinicians should prescribe empirical treatments yielding a per protocol eradication of at least 90%. In recent years several treatments producing ≥90% cure rates have been proposed including sequential therapy, concomitant quadruple therapy, hybrid (dual-concomitant) therapy, and bismuth-containing quadruple therapy. These treatments are likely to represent the recommended first-line treatments in the near future. In the present paper, we are considering a series of critical issues regarding currently available means and approaches for the management of H. pylori infection. Clinical needs and realistic endpoints are taken into account. Furthermore, emerging strategies for the eradication of H. pylori and the existing evidence of their clinical validation and widespread applicability are discussed.
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Helicobacter pylori Eradication Therapies in the Era of Increasing Antibiotic Resistance: A Paradigm Shift to Improved Efficacy. Gastroenterol Res Pract 2012. [PMID: 22778723 DOI: 10.1155/2012/757926.epub2012jun19] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
With the rising prevalence of antimicrobial resistance, the eradication rates of Helicobacter pylori (H. pylori) with standard treatments are decreasing to unacceptable levels (i.e., ≤80%) in most countries. After these disappointing results, several authorities have proposed that infection with H. pylori should be approached and treated as any other bacterial infectious disease. This implicates that clinicians should prescribe empirical treatments yielding a per protocol eradication of at least 90%. In recent years several treatments producing ≥90% cure rates have been proposed including sequential therapy, concomitant quadruple therapy, hybrid (dual-concomitant) therapy, and bismuth-containing quadruple therapy. These treatments are likely to represent the recommended first-line treatments in the near future. In the present paper, we are considering a series of critical issues regarding currently available means and approaches for the management of H. pylori infection. Clinical needs and realistic endpoints are taken into account. Furthermore, emerging strategies for the eradication of H. pylori and the existing evidence of their clinical validation and widespread applicability are discussed.
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Yanai A, Sakamoto K, Akanuma M, Ogura K, Maeda S. Non-bismuth quadruple therapy for first-line Helicobacter pylori eradication: A randomized study in Japan. World J Gastrointest Pharmacol Ther 2012; 3:1-6. [PMID: 22408744 PMCID: PMC3296803 DOI: 10.4292/wjgpt.v3.i1.1] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/02/2011] [Revised: 01/29/2012] [Accepted: 02/03/2012] [Indexed: 02/06/2023] Open
Abstract
AIM: To find the way to improve the eradication rate of first-line therapy in Japanese patients.
METHODS: We prospectively compared the effectiveness of 7-d quadruple therapy to standard 7 d triple therapy in Japanese patients infected with Helicobacter pylori (H. pylori). One hundred and nineteen patients were randomly assigned to receive 7-d non-bismuth quadruple therapy with lansoprazole, amoxicillin, clarithromycin and metronidazole (LACM7) or 7-d triple therapy with lansoprazole, amoxicillin and clarithromycin (LAC7). After three months, H. pylori status was analyzed by 13C-urea breath test. Incidence rates of adverse events were evaluated by use of questionnaires.
RESULTS: By intention-to-treat (ITT) analysis, the eradication rate in the LACM7 group was 94.9%, which was significantly higher than the LAC7 group (68.3%, P < 0.001). Per protocol analysis also showed a significantly higher eradication rate in the LACM7 group (98.3%) than the LAC7 group (73.2%, P < 0.001). Nevertheless, the incidence of serious adverse events did not differ between the two groups (RR: 1.10, 95% CI: 0.70-1.73, P = 0.67).
CONCLUSION: Seven day non-bismuth quadruple therapy (LACM7) was superior to standard 7-d triple therapy (LAC7) for first-line eradication.
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Affiliation(s)
- Ayako Yanai
- Ayako Yanai, Department of Gastroenterology, Toranomon Hospital Kajigaya, 1-3-1 Kajigaya, Takatsu-ku, Kawasaki, Kanagawa 213-8587, Japan
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Georgopoulos S, Papastergiou V, Xirouchakis E, Laudi F, Papantoniou N, Lisgos P, Spiliadi C, Fragou P, Skorda L, Karatapanis S. Evaluation of a four-drug, three-antibiotic, nonbismuth-containing "concomitant" therapy as first-line Helicobacter pylori eradication regimen in Greece. Helicobacter 2012; 17:49-53. [PMID: 22221616 DOI: 10.1111/j.1523-5378.2011.00911.x] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
BACKGROUND The eradication rates of Helicobacter pylori (H. pylori) with standard treatments are decreasing worldwide as in Greece. Studies with new antibiotic combinations are needed to find better methods of eradication. Therefore, the aim of this study was to evaluate efficacy and tolerability of a 10-day, four-drug, three-antibiotic, nonbismuth-containing concomitant regimen. MATERIALS AND METHODS This is a prospective, open-label, multicenter study that included 131 patients infected with H. pylori. All patients were diagnosed with peptic ulcer disease or nonulcer dyspepsia by endoscopy. H. pylori infection was established by at least two positive tests among rapid urease test, gastric histology, and (13) C-urea breath test. For 10 days, all patients received esomeprazole 40mg, amoxycillin 1000mg, clarithromycin 500mg, and metronidazole 500mg, all b.d. eradication was assessed with (13) C urea breath test 8weeks after the start of treatment. Intention-to-treat and per-protocol eradication rates were determined. RESULTS One hundred and twenty-seven of the 131 patients completed the study. At intention-to-treat analysis, the eradication rate was 91.6% (95% confidence interval (CI), 85.5-95.7%). For the per-protocol analysis, the eradication rate was 94.5% (95% CI, 89-97.8%). Adverse events were noted in 42 of 131 (32.1%); drug compliance was excellent with 96.9% of the patients taking more than 90% of the prescribed medication. CONCLUSION A 10-day concomitant regimen appears to be an effective, safe, and well-tolerated treatment option for first-line H. pylori eradication in Greece.
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Lee JW, Kim N, Nam RH, Park JH, Kim JM, Jung HC, Song IS. Mutations of Helicobacter pylori associated with fluoroquinolone resistance in Korea. Helicobacter 2011; 16:301-10. [PMID: 21762270 DOI: 10.1111/j.1523-5378.2011.00840.x] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
BACKGROUND AND AIM Fluoroquinolone resistance of Helicobacter pylori is known to be dependent on mutations in the QRDR of gyrA. This study was performed to investigate the distribution of gyrA point mutations and to evaluate the impact of the mutations on second-line H. pylori eradication therapy. METHODS After H. pylori isolation from gastric mucosal specimens, fluoroquinolone resistance was examined using the agar dilution method. DNA sequencing of the QRDR of gyrA was performed in 89 fluoroquinolone-resistant and 27 fluoroquinolone-susceptible isolates. Transformation experiments were performed to confirm mutations in the resistant strains. The eradication rates of moxifloxacin-containing triple therapy were evaluated depending on the resistance of fluoroquinolone. RESULTS The gyrA mutations were detected in 75.3% (55 of 73 strains) of the primary resistant strains and 100% (16 strains) of the secondary resistant strains. The most common mutations were Asp-91 (36.0%) and Asn-87 (33.7%). The MIC values in the transformed strains differed depending on the gyrA mutations, N87, and D91. Six patients with fluoroquinolone-resistant strains received moxifloxacin-containing triple therapy as the second-line therapy, and two of three patients with Asn-87 mutations (66.7%) failed in the eradication. By contrast, three patients with Asp-91 mutations had successful eradication treatment. CONCLUSIONS Fluoroquinolone resistance of H. pylori was caused by gyrA Asn-87 and Asp-91 point mutations. The Asn-87 mutation seems to be an important determinant of failure of fluoroquinolone-containing triple eradication therapy based on eradication results.
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Affiliation(s)
- Jung W Lee
- Department of Internal Medicine, Seoul National University Bundang Hospital, Seongnam, Gyeonggi-do, Korea
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Early endoscopy in systemic sclerosis without gastrointestinal symptoms. Rheumatol Int 2010; 32:165-8. [PMID: 20711592 DOI: 10.1007/s00296-010-1595-y] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2009] [Accepted: 07/28/2010] [Indexed: 12/18/2022]
Abstract
Investigation into the upper GI-tract of patients suffering from systemic sclerosis [SSc] and mixed connective tissue disease [MCTD] without symptoms of GI-tract involvement early in the course of the disease to diagnose inflammatory and motility disorders. We retrospectively analysed patients with SSc and MCTD who underwent oesophago-gastro-duodenoscopy [OGD] within a year of the first diagnosis. Patients with a Rodnan skin score above 5, proton pump inhibitors and treatment regimes potentially harmful to the mucosa of the upper GI-tract were excluded. Mucosal damage of the oesophagus was classified according to the Los Angeles Classification. Oesophageal dysmotility was assessed during OGD and confirmed by video cineradiography. A total of thirteen patients with SSc and six with MCTD fulfilled the inclusion criteria. OGD revealed reflux-oesophagitis in 77%, dysmotility of the distal oesophagus in 85%, gastritis in 92% [31% erosive gastritis] and Helicobacter pylori positivity in 38% of our patients suffering from SSc. Patients with MCTD showed features of reflux-oesophagitis, dysmotility of the distal oesophagus, gastritis and dysmotility of the stomach in 0.6%. In all thirteen patients with SSc, significant pathology of the upper GI-tract was found. The results of this study might indicate that OGD should be performed early in patients diagnosed with SSc, even if they do not report typical symptoms. An early diagnose of GI involvement might be followed by an effective therapy and therefore subsequently may improve the prognosis.
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Empiric quadruple vs. triple therapy for primary treatment of Helicobacter pylori infection: Systematic review and meta-analysis of efficacy and tolerability. Am J Gastroenterol 2010; 105:65-73. [PMID: 19755966 DOI: 10.1038/ajg.2009.508] [Citation(s) in RCA: 150] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
OBJECTIVES Recent treatment guidelines recommend two first-line therapies for Helicobacter pylori infection: proton pump inhibitor (PPI), bismuth, tetracycline, and metronidazole (quadruple therapy) or PPI, clarithromycin, and amoxicillin (triple therapy). We performed a systematic review and meta-analysis to compare the efficacy and tolerability of these regimens as first-line treatment of H. pylori. METHODS A search of MEDLINE, EMBASE, Google Scholar, the Cochrane Central Register of Controlled Trials, ACP Journal Club, the Database of Abstracts of Reviews of Effectiveness, Cochrane Methodology Register, Health Technology Assessment Database, and abstracts from prominent gastrointestinal scientific meetings was carried out. Randomized controlled trials (RCTs) comparing bismuth quadruple therapy to clarithromycin triple therapy were selected for meta-analysis. Two independent reviewers extracted data, using standardized data forms. Meta-analysis was carried out with the metan command in Stata 10.1. Funnel plots and subgroup analyses were carried out. RESULTS Nine RCTs (N=1,679) were included. Although dosing regimens of clarithromycin triple therapy were quite consistent between trials, dosing regimens varied considerably for bismuth quadruple therapy. Bismuth quadruple therapy achieved eradication in 78.3% of patients, whereas clarithromycin triple therapy achieved an eradication rate of 77.0% (risk ratio (RR)=1.002, 95% confidence interval (CI): 0.936-1.073). There was moderate heterogeneity and no evidence for significant publication bias. Subgroup analyses by study location, treatment duration, and study population did not account for the heterogeneity. There were no statistically significant differences in side effects yielded by quadruple vs. clarithromycin triple therapy (RR=1.04, 95% CI: 1.04-1.14). CONCLUSIONS Quadruple and triple therapies yielded similar eradication rates as primary therapy for H. pylori infection. Both therapies yielded suboptimal eradication rates. Patient compliance and side effects are similar for quadruple and triple therapies.
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Triple or quadruple tetracycline-based therapies versus standard triple treatment for Helicobacter pylori treatment. Am J Med Sci 2009; 338:50-3. [PMID: 19474657 DOI: 10.1097/maj.0b013e31819c7320] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
BACKGROUND Our aim was to compare lansoprazole-tetracycline-metranidazole (LTM) as first-line treatment with the classical lansoprazole-amoxicillin-clarithromycin (LAC) and bismuth-containing quadruple treatments. PATIENTS AND METHODS This prospective, single-center, randomized study included 464 consecutive Helicobacter pylori-positive patients with dyspeptic symptoms. A total of 415 patients completed the study. The patients were allocated into 4 study groups using random sampling numbers as follows-LAC group: lansoprazole 30 mg twice daily, amoxicillin 1000 mg twice daily, and clarithromycin 500 mg twice daily for 14 days; BLTM group: bismuth subcitrate 300 mg 4 times a day, lansoprazole 30 mg twice daily, tetracycline 500 mg 4 times a day, and metronidazole 500 mg twice daily for 10 days; RBLTM group: ranitidine bismuth citrate 400 mg twice daily, lansoprazole 30 mg twice daily, tetracycline 500 mg 4 times a day, and metronidazole 500 mg twice daily for 10 days; and LTM group: lansoprazole 30 mg twice daily, tetracycline 500 mg 4 times a day, and metronidazole 500 mg twice daily for 10 days. RESULTS The per protocol H. pylori eradication rate in LAC, BLTM, RBLTM, and LTM groups were 37 of 104 (35.6%), 56 of 102 (54.9%), 67 of 104 (64.4%), and 63 of 105 (60%), respectively. The intention-to-treat eradication rate was 37 of 113 (32.7%) in LAC, 56 of 119 (47.1%) in BLTM, 67 of 117 (57.3%) in RBLTM, and 63 of 115 (54.8%) in LTM group. The BLTM, RBLTM, and LTM treatment groups achieved a significantly better eradication rate than the LAC treatment group (P < 0.001). There was not any significant statistical difference between the groups of BLTM, RBLTM, and LTM. CONCLUSION LTM treatment group achieved a significantly better eradication rate than the LAC treatment group. The success ratio of LTM therapy is comparable with quadruple bismuth-based treatments.
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Sharma BK, Pilania P, Sarbhai K, Singh P, Prabhakar YS. Chemometric descriptors in modeling the carbonic anhydrase inhibition activity of sulfonamide and sulfamate derivatives. Mol Divers 2009; 14:371-84. [DOI: 10.1007/s11030-009-9181-5] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2009] [Accepted: 07/11/2009] [Indexed: 01/19/2023]
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Taghavi SA, Jafari A, Eshraghian A. Efficacy of a new therapeutic regimen versus two routinely prescribed treatments for eradication of Helicobacter pylori: a randomized, double-blind study of doxycycline, co-amoxiclav, and omeprazole in Iranian patients. Dig Dis Sci 2009; 54:599-603. [PMID: 18594971 DOI: 10.1007/s10620-008-0374-z] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/22/2008] [Accepted: 06/03/2008] [Indexed: 12/19/2022]
Abstract
This study compared a new regimen (group A: doxycycline, co-amoxiclav, omeprazole) and two routinely prescribed regimens (group B: amoxicillin, omeprazole, furazolidone, bismuth; group C: amoxicillin, clarithromycin, omeprazole) to find an acceptable first-line treatment option for Helicobacter pylori. The study population consisted of 189 patients who referred to our clinic to undergo endoscopy due to ulcer-like dyspepsia. The H. pylori eradication rate was 68% in group A, 56% in group B, and 70% in group C according to per-control analysis. There was no statistically significant difference in H. pylori eradication between groups A and B (P = 0.187), groups A and C (P = 0.857), and groups B and C (P = 0.15). In conclusion, although none of the three eradication regimens can be recommended as a first-line eradication treatment, the new regimen is at least as effective and probably better tolerated than the two routinely applied regimens.
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Affiliation(s)
- Seyed Alireza Taghavi
- Gasteroenterology Research Center, Shiraz University of Medical Science, Shiraz, Iran
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Cloning, polymorphism, and inhibition of beta-carbonic anhydrase of Helicobacter pylori. J Gastroenterol 2009; 43:849-57. [PMID: 19012038 DOI: 10.1007/s00535-008-2240-3] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/30/2007] [Accepted: 06/26/2008] [Indexed: 02/04/2023]
Abstract
BACKGROUND Carbonic anhydrase (CA) catalyzes the reversible hydration of CO(2) to bicarbonate and a proton, and alpha-class CA has been reported to facilitate the acid acclimation of Helicobacter pylori (hpalphaCA). The purpose of this study was to characterize the beta-class CA of H. pylori (hpbetaCA) and elucidate the role of this enzyme as a possible drug target for eradication therapy. METHODS We isolated DNA clones of independent H. pylori strains obtained from patients with gastritis (n = 15), gastric ulcer (n = 6), or gastric cancer (n = 16), and then studied genetic polymorphisms. In addition, the susceptibility of H. pylori to sulpiride, an antiulcer drug and efficient inhibitor of both hpalphaCA and hpbetaCA, was studied with an in vitro killing assay. RESULTS DNA sequences of all 37 hpbetaCA clones encoded a 221 amino acid polypeptide with a variety of polymorphisms (57 types of amino acid substitution at 48 residue positions). There was no polymorphism functionally relevant to the gastric lesion type. One strain included unique residues that were not seen in the other 36 clones from Japanese patients but which were found in a strain obtained from the United Kingdom. Sulpiride had killing effects at concentrations greater than 200 microg/ml for H. pylori, including strains resistant to clarithromycin, metronidazole, or ampicillin. CONCLUSIONS Helicobacter pylori might have evolved independently in the Caucasian and Japanese populations. Dual inhibition of alpha-and beta-class CAs could be applied as alternative therapy for eradication of H. pylori.
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Abstract
BACKGROUND People who are prescribed self-administered medications typically take less than half the prescribed doses. Efforts to assist patients with adherence to medications might improve the benefits of prescribed medications, but also might increase their adverse effects. OBJECTIVES To update a review summarizing the results of randomized controlled trials (RCTs) of interventions to help patients follow prescriptions for medications for medical problems, including mental disorders but not addictions. SEARCH STRATEGY We updated searches of The Cochrane Library, MEDLINE, CINAHL, EMBASE, International Pharmaceutical Abstracts (IPA), PsycINFO (all via OVID) and Sociological Abstracts (via CSA) in January 2007 with no language restriction. We also reviewed bibliographies in articles on patient adherence and articles in our personal collections, and contacted authors of relevant original and review articles. SELECTION CRITERIA Articles were selected if they reported an unconfounded RCT of an intervention to improve adherence with prescribed medications, measuring both medication adherence and treatment outcome, with at least 80% follow-up of each group studied and, for long-term treatments, at least six months follow-up for studies with positive initial findings. DATA COLLECTION AND ANALYSIS Study design features, interventions and controls, and results were extracted by one review author and confirmed by at least one other review author. We extracted adherence rates and their measures of variance for all methods of measuring adherence in each study, and all outcome rates and their measures of variance for each study group, as well as levels of statistical significance for differences between study groups, consulting authors and verifying or correcting analyses as needed. The studies differed widely according to medical condition, patient population, intervention, measures of adherence, and clinical outcomes. Therefore, we did not feel that quantitative analysis was scientifically justified; rather, we conducted a qualitative analysis. MAIN RESULTS For short-term treatments, four of ten interventions reported in nine RCTs showed an effect on both adherence and at least one clinical outcome, while one intervention reported in one RCT significantly improved patient adherence, but did not enhance the clinical outcome. For long-term treatments, 36 of 81 interventions reported in 69 RCTs were associated with improvements in adherence, but only 25 interventions led to improvement in at least one treatment outcome. Almost all of the interventions that were effective for long-term care were complex, including combinations of more convenient care, information, reminders, self-monitoring, reinforcement, counseling, family therapy, psychological therapy, crisis intervention, manual telephone follow-up, and supportive care. Even the most effective interventions did not lead to large improvements in adherence and treatment outcomes. AUTHORS' CONCLUSIONS For short-term treatments several quite simple interventions increased adherence and improved patient outcomes, but the effects were inconsistent from study to study with less than half of studies showing benefits. Current methods of improving adherence for chronic health problems are mostly complex and not very effective, so that the full benefits of treatment cannot be realized. High priority should be given to fundamental and applied research concerning innovations to assist patients to follow medication prescriptions for long-term medical disorders.
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Affiliation(s)
- R B Haynes
- McMaster University, Clinical Epidemiology & Biostatistics and Medicine, Faculty of Health Sciences, 1200 Main Street West, Rm. 2C10B, Hamilton, Ontario, Canada L8N 3Z5.
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Nishimori I, Minakuchi T, Kohsaki T, Onishi S, Takeuchi H, Vullo D, Scozzafava A, Supuran CT. Carbonic anhydrase inhibitors: the beta-carbonic anhydrase from Helicobacter pylori is a new target for sulfonamide and sulfamate inhibitors. Bioorg Med Chem Lett 2007; 17:3585-94. [PMID: 17482815 DOI: 10.1016/j.bmcl.2007.04.063] [Citation(s) in RCA: 135] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2007] [Revised: 04/12/2007] [Accepted: 04/18/2007] [Indexed: 02/06/2023]
Abstract
DNA clones for the beta-class carbonic anhydrase (CA, EC 4.2.1.1) of Helicobactor pylori (hpbetaCA) were obtained. A recombinant hpbetaCA protein lacking the N-terminal 15-amino acid residues was produced and purified, representing a catalytically efficient CA. hpbetaCA was strongly inhibited (K(I)s in the range of 24-45 nM) by many sulfonamides/sulfamates, among which acetazolamide, ethoxzolamide, topiramate, and sulpiride, all clinically used drugs. The dual inhibition of alpha- and/or beta-class CAs of H. pylori might represent a useful alternative for the management of gastritis/gastric ulcers, as well as gastric cancer. This is also the first study showing that a bacterial beta-CA can be a drug target.
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Affiliation(s)
- Isao Nishimori
- Department of Gastroenterology and Hepatology, Kochi Medical School, Nankoku, Kochi 783-8505, Japan
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Abstract
Evaluation of: Duckworth M, Menard A, Megraud F, Mendz GL: Bioinformatic analysis of Helicobacter pylori XGPRTase: a potential therapeutic target.Helicobacter 11, 287–295 (2006). Helicobacter pylori is a globally spread pathogen, with roughly 50% of the human population being contaminated. It causes severe gastrointestinal diseases, such as chronic gastritis, peptic ulcers and gastric cancer, which lead to significant morbidity and mortality. Much effort is dedicated by scientists to design alternative strategies to treat this infection, due to the widespread emergence of resistance to the presently used pharmacological agents. The xanthine–guanine phosphoribosyltransferase (XGPRTase) enzyme of H. pylori may be one of these targets, as the enzyme was recently purified, characterized and shown to be essential to the life cycle of the parasite. Duckworth and colleagues used a bioinformatic approach to investigate this target. The parasite enzyme has been compared with those present in various bacteria, archaea and eukaryotes, and its main features have been deduced by using conserved domain analysis, multiple sequence alignment and phylognetic analysis, as well as protein 3D modeling. However, significant findings did not emerge after this work for the design of XGPRTase inhibitors.
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Affiliation(s)
- Claudiu T Supuran
- Università degli studi di Firenze, Laboratorio di Chimica Bioinorganica, Room. 188, Via della Lastruccia 3, I-50019 Sesto Fiorentino (Firenze), Italy
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Cheon JH, Kim SG, Kim JM, Kim N, Lee DH, Kim JS, Jung HC, Song IS. Combinations containing amoxicillin-clavulanate and tetracycline are inappropriate for Helicobacter pylori eradication despite high in vitro susceptibility. J Gastroenterol Hepatol 2006; 21:1590-5. [PMID: 16928222 DOI: 10.1111/j.1440-1746.2006.04291.x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
BACKGROUND The purpose of the present paper was to evaluate the efficacy and tolerability of amoxicillin-clavulanate and tetracycline-based quadruple therapy as an alternative second-line treatment for H. pylori infection. METHODS The study subjects consisted of 54 patients infected with H. pylori, in whom initial triple therapy had failed. Subjects were randomized to receive the following 7-day therapies: (i) pantoprazole 40 mg b.i.d., tripotassium dicitrate bismuthate 300 mg q.i.d., amoxicillin-clavulanate 1000 mg b.i.d., and tetracycline 500 mg q.i.d. (PBAT); or (ii) pantoprazole 40 mg b.i.d., tripotassium dicitrate bismuthate 300 mg q.i.d., metronidazole 500 mg t.i.d., and tetracycline 500 mg q.i.d. (PBMT). Eradication rates based on antibiotic susceptibility, drug compliance and side-effect rates were evaluated and compared. RESULTS The H. pylori eradication rates were 16.0%/17.4% with PBAT and 65.5%/70.4% with PBMT by intention-to-treat (P<0.001) and per-protocol analyses (P<0.001), respectively. In patients who received PBAT, the eradication rates were only 16.7% (2/12) for both amoxicillin and tetracycline-susceptible H. pylori strains. Drug compliance and side-effect rates were similar in the two groups. CONCLUSIONS Despite high individual in vitro antimicrobial activity, amoxicillin-clavulanate and tetracycline-based quadruple therapy showed low eradication rates, which strongly suggests that it should not be considered as a therapeutic option for H. pylori eradication.
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Affiliation(s)
- Jae Hee Cheon
- Department of Internal Medicine and Liver Research Institute, Seoul National University College of Medicine, Seoul National University Bundang Hospital, Korea
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Kim N, Kim JM, Kim CH, Park YS, Lee DH, Kim JS, Jung HC, Song IS. Institutional difference of antibiotic resistance of Helicobacter pylori strains in Korea. J Clin Gastroenterol 2006; 40:683-7. [PMID: 16940878 DOI: 10.1097/00004836-200609000-00004] [Citation(s) in RCA: 85] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
GOALS This study was performed to evaluate whether the prevalence rates of primary antibiotic resistance in Helicobacter pylori isolates could be different between 2 institutions, which are located in the different areas in Korea, and to evaluate the effect of antibiotic resistance on the eradication rate of H. pylori. STUDY H. pylori were isolated from gastric mucosal biopsy specimens obtained from 113 Koreans, who did not have any eradication history. The susceptibilities of the H. pylori isolates to amoxicillin, clarithromycin, metronidazole, tetracycline, levofloxacin, and moxifloxacin were examined according to the agar dilution method by 1 technician. RESULTS All of these patients were treated with the same regimen, proton pump inhibitor-amoxicillin-clarithromycin triple therapy. There was a statistical difference in resistance to metronidazole, levofloxacin, and moxifloxacin among 6 antibiotics between 2 institutions located in Seoul and Gyeonggi province. The rates of eradication were 94.2% for the clarithromycin and amoxicillin-susceptible strains, and 42.8% for the amoxicillin-susceptible and clarithromycin-resistant strains. In contrast, eradication rate was 100% for the amoxicillin-resistant strains. CONCLUSIONS These results show that there is institutional difference of antibiotic resistance of H. pylori, explaining the institutional difference of eradication rate of H. pylori. The resistance to clarithromycin seems to be an important determinant for the eradication by proton pump inhibitor triple therapy but resistance to amoxicillin does not have any effect.
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Affiliation(s)
- Nayoung Kim
- Department of Internal Medicine, Seoul National University Bundang Hospital, Seoungnam, Gyeonggi-do, Seoul, Korea
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Suzuki T, Matsuo K, Ito H, Sawaki A, Hirose K, Wakai K, Sato S, Nakamura T, Yamao K, Ueda R, Tajima K. Smoking increases the treatment failure for Helicobacter pylori eradication. Am J Med 2006; 119:217-24. [PMID: 16490464 DOI: 10.1016/j.amjmed.2005.10.003] [Citation(s) in RCA: 128] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/27/2005] [Revised: 09/30/2005] [Accepted: 10/03/2005] [Indexed: 12/14/2022]
Abstract
PURPOSE Treatment failure for Helicobacter pylori (H. pylori) eradication is encountered in approximately 10-20% of patients, and many studies have pointed to a link with smoking. To investigate the effects of smoking on eradication outcome, we performed a meta-analysis. METHODS A PubMed search was performed to retrieve articles published up to August 2005. Pooled odds ratio (OR) and differences rate for H. pylori eradication failure in smokers compared with nonsmokers were used as summary statistics. Meta-regression was used for examining the source of heterogeneity. RESULTS Twenty-two published studies (5538 patients), which provided information on eradication failure according to smoking status, were included in the analysis. The summary OR for eradication failure among smokers relative to nonsmokers was 1.95 (95% confidence interval [CI]: 1.55-2.45; P <.01). It corresponds with the differences in eradication rates between smokers and nonsmokers (8.4% [95% CI: 3.3-13.5%, P <.01]). Meta-regression analysis demonstrated that a high proportion of nonulcer dyspepsia patients in studies revealed a higher failure rate among smokers, compared with a low proportion of nonulcer dyspepsia. CONCLUSIONS Our meta-analysis demonstrated that smoking increases the treatment failure rate for H. pylori eradication.
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Affiliation(s)
- Takeshi Suzuki
- Division of Epidemiology and Prevention, Aichi Cancer Center Research Institute, Nagoya, Japan
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Cheon JH, Kim N, Lee DH, Kim JM, Kim JS, Jung HC, Song IS. Efficacy of moxifloxacin-based triple therapy as second-line treatment for Helicobacter pylori infection. Helicobacter 2006; 11:46-51. [PMID: 16423089 DOI: 10.1111/j.0083-8703.2006.00371.x] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
BACKGROUND AND AIM Metronidazole and tetracycline-based second-line quadruple therapy, widely used for Helicobacter pylori infection, often ends up in failure due to antibiotic resistance and poor compliance in Korea. Our aim is to evaluate the efficacy and tolerability of moxifloxacin-based triple therapy as an alternative second-line treatment for H. pylori infection. METHODS The subjects consisted of 85 patients infected with H. pylori, in whom initial proton pump inhibitor triple therapy had failed. They were randomized to receive the following 7-day therapy: 1, moxifloxacin 400 mg q.d., esomeprazole 20 mg b.i.d., and amoxicillin 1 g b.i.d.; and 2, esomeprazole 40 mg b.i.d., tripotassium dicitrate bismuthate 300 mg q.i.d., metronidazole 500 mg t.i.d., and tetracycline 500 mg q.i.d. Eradication rates, drug compliance, and side-effect rates of each group were evaluated. RESULTS The eradication rates were 75.6 and 83.8% with moxifloxacin triple therapy, and 54.5 and 72.7% with quadruple therapy by intention-to-treat (p = .042) and per-protocol analyses (p = .260), respectively. Moxifloxacin triple therapy was significantly superior to quadruple therapy in terms of side-effect rates (p = .039). Compliance for therapy, i.e., the percentage of tablets taken (> 85%), was 90.2 and 75.0%, numerically higher in moxifloxacin triple therapy group than in quadruple therapy group, but without statistical difference (p = .065). CONCLUSIONS Moxifloxacin-based triple therapy showed high eradication rates with few side effects and good drug compliance, suggesting this regimen could be a safe and effective option as second-line therapy for H. pylori infection in Korea.
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Affiliation(s)
- Jae Hee Cheon
- Department of Internal Medicine, Liver Research Institute, Seoul National University College of Medicine, Seoul, Korea
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Haynes RB, Yao X, Degani A, Kripalani S, Garg A, McDonald HP. Interventions to enhance medication adherence. Cochrane Database Syst Rev 2005:CD000011. [PMID: 16235271 DOI: 10.1002/14651858.cd000011.pub2] [Citation(s) in RCA: 201] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
BACKGROUND People who are prescribed self-administered medications typically take less than half the prescribed doses. Efforts to assist patients with adherence to medications might improve the benefits of prescribed medications, but also might increase their adverse effects. OBJECTIVES To update a review summarizing the results of randomized controlled trials (RCTs) of interventions to help patients follow prescriptions for medications for medical problems, including mental disorders but not addictions. SEARCH STRATEGY Computerized searches were updated to September 2004 without language restriction in MEDLINE, EMBASE, CINAHL, The Cochrane Library, International Pharmaceutical Abstracts (IPA), PsycINFO and SOCIOFILE. We also reviewed bibliographies in articles on patient adherence and articles in our personal collections, and contacted authors of original and review articles on the topic. SELECTION CRITERIA Articles were selected if they reported an unconfounded RCT of an intervention to improve adherence with prescribed medications, measuring both medication adherence and treatment outcome, with at least 80% follow-up of each group studied and, for long-term treatments, at least six months follow-up for studies with positive initial findings. DATA COLLECTION AND ANALYSIS Study design features, interventions and controls, and results were extracted by one reviewer and confirmed by at least one other reviewer. We extracted adherence rates and their measures of variance for all methods of measuring adherence in each study, and all outcome rates and their measures of variance for each study group, as well as levels of statistical significance for differences between study groups, consulting authors and verifying or correcting analyses as needed. MAIN RESULTS For short-term treatments, four of nine interventions reported in eight RCTs showed an effect on both adherence and at least one clinical outcome, while one intervention reported in one RCT significantly improved patient compliance, but did not enhance the clinical outcome. For long-term treatments, 26 of 58 interventions reported in 49 RCTs were associated with improvements in adherence, but only 18 interventions led to improvement in at least one treatment outcome. Almost all of the interventions that were effective for long-term care were complex, including combinations of more convenient care, information, reminders, self-monitoring, reinforcement, counseling, family therapy, psychological therapy, crisis intervention, manual telephone follow-up, and supportive care. Even the most effective interventions did not lead to large improvements in adherence and treatment outcomes. Six studies showed that telling patients about adverse effects of treatment did not affect their adherence. AUTHORS' CONCLUSIONS Improving short-term adherence is relatively successful with a variety of simple interventions. Current methods of improving adherence for chronic health problems are mostly complex and not very effective, so that the full benefits of treatment cannot be realized. High priority should be given to fundamental and applied research concerning innovations to assist patients to follow medication prescriptions for long-term medical disorders.
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Affiliation(s)
- R B Haynes
- McMaster University Medical Centre, Clinical Epidemiology and Biostatistics, HSC Room 2C10b, 1200 Main St. West, Hamilton, Ontario, Canada L8N 3Z5.
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Gisbert JP. The recurrence of Helicobacter pylori infection: incidence and variables influencing it. A critical review. Am J Gastroenterol 2005; 100:2083-99. [PMID: 16128956 DOI: 10.1111/j.1572-0241.2005.50043.x] [Citation(s) in RCA: 95] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
The rate of H. pylori recurrence after eradication of the microorganism seems to be relatively low, at least in developed countries, where the mean annual reinfection rate is of approximately 3% per patient-year of follow-up, although the risk of reinfection in some developing regions is considerably higher. Several findings suggest that recrudescence rather than reinfection is likely to be responsible for most cases of recurrence: (i) the recurrences decrease with time and decline sharply after the first year, and (ii) studies using molecular fingerprinting techniques (polymerase chain reaction [PCR]) confirm that the identified microorganisms (before and after therapy) are usually genetically identical. The lower the efficacy of an antibiotic therapy, the greater the likelihood that recurrence occur, again suggesting that in these cases temporary "clearance" has been achieved rather than true eradication. The value of the (13)C-urea breath test after treatment is higher in those patients who suffer a recurrence; therefore, selection of a lower cut-off value may be helpful to maintain the diagnostic accuracy of posttreatment breath test, and thus preventing recrudescences. The observation of a pattern of histological (active) gastritis without the concomitant finding of H. pylori must raise the suspicion of a diagnostic error. Some studies suggest that recurrence is relatively infrequent, even if the patient's spouse is H. pylori-positive, suggesting that the patient's partner does not act as a reservoir for the reinfection. However, other investigators achieve contrary results, although a common exogenous source of H. pylori (for both partner's infection and patient's reinfection) cannot be ruled out. The oral cavity may be a potential source for recrudescence of gastric infection after successful therapy. When peptic ulcer reappears (sometimes with bleeding recurrence) or gastric MALT (mucosa-associated lymphoid tissue) lymphoma relapses after previous H. pylori eradication, recolonization of the gastric mucosa by the organism has almost always occurred.
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Affiliation(s)
- Javier P Gisbert
- Department of Gastroenterology, University Hospital of La Princesa, Madrid, Spain
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Gisbert JP, Piqué JM. Indicaciones y consecuencias de la erradicación de Helicobacter pylori en la enfermedad por reflujo gastroesofágico. Med Clin (Barc) 2005; 124:697-709. [PMID: 15899166 DOI: 10.1157/13075094] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Several epidemiological data indicate that H. pylori infection prevalence in patients with gastroesophageal reflux disease (GERD) is lower than that reported in respective controls, which would suggest that the organism plays a protective role against this disease. On the other hand, most studies demonstrate that the presence of the infection in patients with GERD does not negatively affect the therapeutic efficacy of proton pump inhibitors (PPIs), and, in case of negatively influencing it, the effects are not clinically relevant and are easily controllable with standard antisecretory treatment. Therefore, the decision to administer H. pylori eradication treatment to a patient should not be influenced by the concomitant presence of GERD. In most cases, H. pylori eradication does not seem to induce GERD development, and it does not seem to worsen GERD when it was already present. Nevertheless, when the gastritis pattern is unknown before the antibiotic administration, the effect of H. pylori eradication on gastric acid secretion and the incidence of GERD is unpredictable. In the exceptional cases in which H. pylori eradication could have negative effects on GERD, its clinical relevance will be limited, and reflux symptoms or endoscopic esophagitis will favourably respond to the standard PPI antisecretory treatment. Therefore, again, when H. pylori eradication is indicated in a particular patient, the concomitant diagnosis of GERD should not change our attitude. Finally, is has recently been recommended to eradicate H. pylori infection in those patients with GERD needing long-term treatment with PPI, as some studies have reported that these drugs induce, in presence of the organism, an atrophic gastritis, with the consequent risk of gastric cancer. However, most of these studies have important methodological defects, and several authors have reported contrary results. In any case, the appearance in the gastric mucosa of clinically relevant lesions, such as intestinal metaplasia, dysplasia or adenocarcinoma, in patients treated with PPI for several years, has not yet been demonstrated, although this could simply be a problem of time. This question seems to be too controversial to be answered with the available data, and we should wait until new studies clarify this topic. In the meantime, as it occurs with any controversial indication, the decision of the doctor facing a patient infected by H. pylori and needing maintenance therapy with PPIs should be assessed on a case by case basis.
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Affiliation(s)
- Javier P Gisbert
- Servicio de Aparato Digestivo, Hospital Universitario de La Princesa, Madrid, España.
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Marko D, Calvet X, Ducons J, Guardiola J, Tito L, Bory F. Comparison of two management strategies for Helicobacter pylori treatment: clinical study and cost-effectiveness analysis. Helicobacter 2005; 10:22-32. [PMID: 15691312 DOI: 10.1111/j.1523-5378.2005.00288.x] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/09/2022]
Abstract
BACKGROUND First-line proton pump inhibitor-based triple and quadruple therapies for Helicobacter pylori eradication present similar levels of efficacy. Cross-over treatment (quadruple following triple failure, and triple following quadruple failure) seems the most sensible approach to treatment failures, but the two strategies -'quadruple first' versus 'triple first'- have not been previously compared. The aims of our study were to assess the usefulness and the cost-effectiveness of the two treatment strategies. MATERIAL AND METHODS Forty-nine out of 344 patients included in a previous study comparing triple therapy - 7 days of omeprazole, amoxicillin and clarithromycin twice a day - with quadruple therapy - 7 days of omeprazole twice a day, plus tetracycline, metronidazole and bismuth subcitrate three times a day - failed initial treatment and were assigned to cross-over therapy. Cure was determined by urea breath test. A decision analysis was performed to compare the two eradication strategies. RESULTS Intention to treat cure rates were 46% (10/22 patients; 95% CI 24-68%) for second-line triple therapy and 63% (17/27 patients; 95% CI 42-81%) for second-line quadruple therapy. Per protocol cure rates were 71% and 85%, respectively. Intention to treat cure rates were 87% (95% CI 81-92%) for the 'triple first' versus 86% (95% CI 80-91%) for the 'quadruple first' strategy (p = .87). The 'quadruple first' strategy was more cost-effective. The incremental cost of 'triple first' strategy per person was 19 in the low-cost area and 65 US dollars in the high-cost area. CONCLUSIONS The effectiveness of 'triple first' and 'quadruple first' strategies is similar, although the latter seems slightly more cost-effective.
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Affiliation(s)
- Dritana Marko
- Centre de Recerca d'Economia del Benestar, Parc Científic de Barcelona, Universitat de Barcelona, Barcelona, Spain
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Fischbach LA, van Zanten S, Dickason J. Meta-analysis: the efficacy, adverse events, and adherence related to first-line anti-Helicobacter pylori quadruple therapies. Aliment Pharmacol Ther 2004; 20:1071-82. [PMID: 15569109 DOI: 10.1111/j.1365-2036.2004.02248.x] [Citation(s) in RCA: 141] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
BACKGROUND Owing to rising drug-resistant Helicobacter pylori infections, currently recommended proton-pump inhibitor-based triple therapies are losing their efficacy, and regimens efficacious in the presence of drug resistance are needed. AIMS To summarize the efficacy, safety and adherence of first-line quadruple H. pylori therapies in adults. METHODS Meta-regression models identified factors explaining variation in the efficacy of first-line quadruple therapies from 145 treatment arms. Estimates of average efficacy were calculated within homogeneous groups. RESULTS Quadruple therapy containing a gastric acid inhibitor, bismuth, metronidazole and tetracycline was enhanced when omeprazole was included, treatment duration lasted 10-14 days, and when therapy took place in the Netherlands, Hong Kong and Australia. Treatment efficacy decreased as the prevalence of metronidazole resistance increased. Even in areas with a high prevalence of metronidazole resistance, this quadruple regimen eradicated more than 85% of H. pylori infections when it contained omeprazole and was given for 10-14 days. Furthermore, in the presence of clarithromycin resistance, this quadruple regimen eradicated 90-100% of H. pylori infections, while the currently recommended triple therapy containing clarithromycin, amoxicillin and a proton-pump inhibitor eradicated only 25-61% (P < 0.001). Adherence and adverse events for quadruple therapy were similar to currently recommended triple therapies. CONCLUSIONS Guidelines should include quadruple therapy with a proton-pump inhibitor, a bismuth compound, metronidazole and tetracycline among recommended first-line anti-H. pylori therapies.
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Affiliation(s)
- L A Fischbach
- School of Public Health, University of Texas, Dallas Regional Campus, Dallas, TX, USA.
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Calvet X, Montserrat A, Güell M, Vergara M, Gené E. Ranitidine-bismuth citrate, tetracycline and metronidazole followed by triple therapy as alternative strategy for Helicobacter pylori treatment: a pilot study. Eur J Gastroenterol Hepatol 2004; 16:987-90. [PMID: 15371921 DOI: 10.1097/00042737-200410000-00006] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
BACKGROUND Eradication rates of triple therapy--a proton pump inhibitor, clarithromycin and amoxicillin twice daily for 7 days--are suboptimal in some areas of the world. Triple therapy combining ranitidine-bismuth citrate, tetracycline and metronidazole is a very effective second-line therapy. Management strategies including this treatment as first-line therapy may represent a reasonable choice. AIM To evaluate the efficacy of a strategy combining ranitidine-bismuth citrate triple therapy followed by a proton pump inhibitor-based triple therapy for Helicobacter pylori eradication in a pilot study. PATIENTS AND METHODS One hundred and thirty-six consecutive H. pylori-positive patients were treated with 400 mg ranitidine-bismuth citrate twice daily, 500 mg tetracycline three times daily and 500 mg metronidazole three times daily for 7 days. Second-line therapy consisted of 20 mg omeprazole twice daily, 500 mg clarithromycin twice daily and 1 g amoxicillin twice daily for 7 days. The efficacy of the treatment was evaluated by histology or the urea breath test. RESULTS Cure rates were 109/136 patients [80.2%; 95% confidence interval (CI), 72-86%] by intention to treat and 109/127 (85.8%; 95% CI, 78-91%) per protocol. Fifteen of the patients with treatment failure received second-line treatment. Cure rates for the strategy as a whole were 119/136 (87.5%; 95% CI, 81-92%) by intention to treat and 119/123 (96.8%; 95% CI, 92-99%) per protocol. CONCLUSIONS The strategy achieves good eradication rates. As the first-line therapy avoids the use of clarithromycin, it could be useful in areas where high resistance to this antibiotic lead to poor results with triple therapy.
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Affiliation(s)
- Xavier Calvet
- Unitat de Malalties Digestives, Hospital de Sabadell, Institut Universitari Parc Taulí, Universitat Autónoma de Barcelona, Spain.
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Cammarota G, Martino A, Pirozzi G, Cianci R, Branca G, Nista EC, Cazzato A, Cannizzaro O, Miele L, Grieco A, Gasbarrini A, Gasbarrini G. High efficacy of 1-week doxycycline- and amoxicillin-based quadruple regimen in a culture-guided, third-line treatment approach for Helicobacter pylori infection. Aliment Pharmacol Ther 2004; 19:789-95. [PMID: 15043520 DOI: 10.1111/j.1365-2036.2004.01910.x] [Citation(s) in RCA: 64] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
BACKGROUND Helicobacter pylori infection may persist after both first- and second-line current treatments. AIM To assess the efficacy of a third-line, culture-guided treatment approach for the eradication of H. pylori. METHODS Patterns of resistance were analysed in H. pylori isolates from 94 consecutive patients in whom H. pylori infection had persisted after two eradication attempts. Using the epsilometer test, susceptibility analysis was performed for amoxicillin, clarithromycin, metronidazole, tetracycline and levofloxacin. Patients were then treated with a culture-guided, third-line regimen: 89 patients with a 1-week quadruple regimen including omeprazole, bismuth, doxycycline and amoxicillin, and five patients with a 1-week triple regimen containing omeprazole, amoxicillin and levofloxacin or clarithromycin. RESULTS Ninety-four subjects (100%) were resistant to metronidazole, 89 (95%) to clarithromycin, 29 (31%) to levofloxacin and five (5%) to tetracycline. No resistance to amoxicillin was found in any patient. Overall, H. pylori eradication was obtained in 90% of subjects. The quadruple regimen was effective in 81 patients (92% by per protocol and 91% by intention-to-treat analysis). Four patients (80%, both per protocol and intention-to-treat analysis) were H. pylori-negative after the triple regimen. CONCLUSIONS A culture-guided, third-line therapeutic approach is effective for the eradication of H. pylori. Furthermore, the 1-week doxycycline- and amoxicillin-based quadruple regimen is a good third-line 'rescue' treatment option.
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Affiliation(s)
- G Cammarota
- Department of Internal Medicine and Gastroenterology, Catholic University of Rome, Rome, Italy.
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Abstract
Review of the recently published data on Helicobacter pylori management highlights various interesting aspects. Current H. pylori eradication guidelines generally suggest a noninvasive 'test and treat' strategy for all dyspeptic patients with certain age limits depending on the local gastric neoplasia risk. According to the 'Maastricht 2-2000 Consensus Report' treatment should be thought of as a 'package' considering first- and second-line eradication therapies together. Various centres have published their results using novel antimicrobial formulations and 'rescue' and 'sequential' therapies. Review suggests that care at the specialist level remains a challenge and guidelines are deficient particularly as regards the selection and duration of eradication therapies. Results indicate that differences for CYP2C19 genotype and the selection of proton pump inhibitors have no significant role in determining eradication rates whereas antibiotic resistance and socio-economic factors play a variable role according to different geographical areas. Compliance remains an important factor in determining clinical outcome at the primary and secondary levels worldwide.
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Affiliation(s)
- Francesco Perri
- Department of Internal Medicine, 'Casa Sollievo della Sofferenza' IRCCS, San Giovanni Rotondo, Italy.
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Hassan C, De Francesco V, Zullo A, Scaccianoce G, Piglionica D, Ierardi E, Panella C, Morini S. Sequential treatment for Helicobacter pylori eradication in duodenal ulcer patients: improving the cost of pharmacotherapy. Aliment Pharmacol Ther 2003; 18:641-6. [PMID: 12969091 DOI: 10.1046/j.1365-2036.2003.01694.x] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
BACKGROUND Several studies have shown that Helicobacter pylori eradication rates with standard 7-day triple therapy are unsatisfactory. A novel 10-day sequential treatment regimen recently achieved a significantly higher eradication rate. To improve the pharmacotherapeutic cost, we evaluated whether an acceptable eradication rate could be achieved in peptic ulcer patients by halving the dose of clarithromycin. METHODS In a prospective, open-label study, 152 duodenal ulcer patients with H. pylori infection, assessed by rapid urease test and histology, were enrolled. Patients were randomized to receive either a 10-day sequential treatment comprising rabeprazole 20 mg b.d. plus amoxicillin 1 g b.d. for the first 5 days, followed by rabeprazole 20 mg b.d., clarithromycin 500 mg b.d. and tinidazole 500 mg b.d. for the remaining 5 days (high-dose therapy), or a similar schedule with the clarithromycin doses halved to 250 mg b.d. (low-dose therapy). No further antisecretory drugs were offered. Four to six weeks after therapy, H. pylori eradication and ulcer healing rates were assessed by endoscopy. RESULTS Similar H. pylori eradication rates were observed following high- and low-dose regimens for both per protocol (97.3% vs. 95.9%; P = N.S.) and intention-to-treat (94.7% vs. 92.2%; P = N.S.) analyses. No major side-effects were reported. At repeat endoscopy, peptic ulcer healing was observed in 93% and 93% of patients following high- and low-dose therapy, respectively. CONCLUSION The cheaper low-dose sequential regimen may be suggested for H. pylori eradication in duodenal ulcer patients, even without continued proton pump inhibitor therapy after eradication treatment.
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Affiliation(s)
- C Hassan
- Gastroenterology and Digestive Endoscopy, 'Nuovo Regina Margherita' Hospital, Rome, Italy.
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Gené E, Calvet X, Azagra R, Gisbert JP. Triple vs quadruple therapy for treating Helicobacter pylori infection: an updated meta-analysis. Aliment Pharmacol Ther 2003; 18:543-4. [PMID: 12950427 DOI: 10.1046/j.1365-2036.2003.t01-1-01712.x] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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Chi CH, Lin CY, Sheu BS, Yang HB, Huang AH, Wu JJ. Quadruple therapy containing amoxicillin and tetracycline is an effective regimen to rescue failed triple therapy by overcoming the antimicrobial resistance of Helicobacter pylori. Aliment Pharmacol Ther 2003; 18:347-53. [PMID: 12895220 DOI: 10.1046/j.1365-2036.2003.01653.x] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
AIM To identify optimal antibiotics for second-line quadruple therapy of Helicobacter pylori after failed 1-week triple therapy. METHODS One hundred patients were enrolled in this study after the failure of 1-week triple therapy. They were randomized to receive 1-week quadruple therapy consisting of amoxicillin, omeprazole and bismuth salts, plus either metronidazole or tetracycline. Before quadruple therapy, the H. pylori culture of each patient was tested for metronidazole resistance or clarithromycin resistance by E-test. Six weeks later, an endoscopy or 13C-urea breath test was used to define the success of H. pylori eradication. RESULTS The H. pylori eradication rates by intention-to-treat and per protocol analysis were higher in the tetracycline group than in the metronidazole group (intention-to-treat: 78% vs. 58%, P < 0.05; per protocol: 89% vs. 67%, P < 0.05). In the metronidazole group, but not in the tetracycline group, the per protocol eradication rate of quadruple therapy was lower for the infected isolates with metronidazole resistance than for those without metronidazole resistance (77% vs. 33%, P < 0.05). CONCLUSION Quadruple therapy, including tetracycline and amoxicillin, improves the H. pylori eradication rate after failed triple therapy.
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Affiliation(s)
- C-H Chi
- Department of Internal Medicine, National Cheng Kung University, Tainan, Taiwan
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