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Tungtrongchitr N, Bongkotvirawan P, Ratana-Amornpin S, Siramolpiwat S, Eiamsitrakoon T, Gamnarai P, Wongcha-Um A, Yamaoka Y, Pawa KK, Vilaichone RK. Fourteen-day vonoprazan-based bismuth quadruple therapy for H. pylori eradication in an area with high clarithromycin and levofloxacin resistance: a prospective randomized study (VQ-HP trial). Sci Rep 2024; 14:8986. [PMID: 38637591 PMCID: PMC11026498 DOI: 10.1038/s41598-024-59621-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2024] [Accepted: 04/11/2024] [Indexed: 04/20/2024] Open
Abstract
Potassium-competitive acid blockers (P-CABs) provide potent acid inhibition, yet studies on P-CAB-based quadruple therapy for H. pylori eradication are limited. We theorized that integrating bismuth subsalicylate into a quadruple therapy regimen could enhance eradication rates. However, data on the efficacy of vonoprazan bismuth quadruple therapy are notably scarce. Therefore, the aim of this study was to evaluate the efficacy of vonoprazan-based bismuth quadruple therapy in areas with high clarithromycin and levofloxacin resistance. This was a prospective, single-center, randomized trial conducted to compare the efficacy of 7-day and 14-day vonoprazan-based bismuth quadruple therapy for H. pylori eradication between June 1, 2021, and March 31, 2022. Qualified patients were randomly assigned to the 7-day or 14-day regimen (1:1 ratio by computer-generated randomized list as follows: 51 patients for the 7-day regimen and 50 patients for the 14-day regimen). The regimens consisted of vonoprazan (20 mg) twice daily, bismuth subsalicylate (1024 mg) twice daily, metronidazole (400 mg) three times daily, and tetracycline (500 mg) four times daily. CYP3A4/5 genotyping and antibiotic susceptibility tests were also performed. Successful eradication was defined as 13negative C-UBTs 4 weeks after treatment. The primary endpoint was to compare the efficacy of 7-day and 14-day regimens as first-line treatments, which were assessed by intention-to-treat (ITT) and per-protocol (PP) analyses. The secondary endpoints included adverse effects. A total of 337 dyspeptic patients who underwent gastroscopy were included; 105 patients (31.1%) were diagnosed with H. pylori infection, and 101 patients were randomly assigned to each regimen. No dropouts were detected. The antibiotic resistance rate was 33.3% for clarithromycin, 29.4% for metronidazole, and 27.7% for levofloxacin. The CYP3A4 genotype was associated with 100% rapid metabolism. The H. pylori eradication rates for the 7-day and 14-day regimens were 84.4%, 95% CI 74.3-94.2 and 94%, 95% CI 87.4-100, respectively (RR difference 0.25, 95% CI 0.03-0.53, p value = 0.11). Interestingly, the 14-day regimen led to 100% eradication in the clarithromycin-resistant group. Among the patients in the 7-day regimen group, only two exhibited resistance to clarithromycin; unfortunately, neither of them achieved a cure from H. pylori infection. The incidence of adverse events was similar in both treatment groups, occurring in 29.4% (15/51) and 28% (14/50) of patients in the 7-day and 14-day regimens, respectively. No serious adverse reactions were reported. In conclusion, 14 days of vonoprazan-based bismuth quadruple therapy is highly effective for H. pylori eradication in areas with high levels of dual clarithromycin and levofloxacin resistance.
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Affiliation(s)
- Nuttapat Tungtrongchitr
- Ramathibodi Medical School, Chakri Naruebodindra Medical Institute, Faculty of Medicine Ramathibodi Hospital, Mahidol University, Samut Prakan, 10540, Thailand
| | - Phubordee Bongkotvirawan
- Department of Medicine, Faculty of Medicine, Center of Excellence in Digestive Diseases and Gastroenterology Unit, Thammasat University, Pathum Thani, 12120, Thailand
| | - Sarita Ratana-Amornpin
- Department of Medicine, Faculty of Medicine, Center of Excellence in Digestive Diseases and Gastroenterology Unit, Thammasat University, Pathum Thani, 12120, Thailand
| | - Sith Siramolpiwat
- Department of Medicine, Faculty of Medicine, Center of Excellence in Digestive Diseases and Gastroenterology Unit, Thammasat University, Pathum Thani, 12120, Thailand
- Chulabhorn International College of Medicine (CICM), Thammasat University, Pathum Thani, 12120, Thailand
| | - Thanee Eiamsitrakoon
- Chulabhorn International College of Medicine (CICM), Thammasat University, Pathum Thani, 12120, Thailand
| | - Pornpen Gamnarai
- Department of Medicine, Faculty of Medicine, Center of Excellence in Digestive Diseases and Gastroenterology Unit, Thammasat University, Pathum Thani, 12120, Thailand
| | - Arti Wongcha-Um
- Department of Medicine, Faculty of Medicine, Center of Excellence in Digestive Diseases and Gastroenterology Unit, Thammasat University, Pathum Thani, 12120, Thailand
- Chulabhorn International College of Medicine (CICM), Thammasat University, Pathum Thani, 12120, Thailand
| | - Yoshio Yamaoka
- Department of Environmental and Preventive Medicine, Faculty of Medicine, Oita University, Yufu, Oita, 879-5593, Japan
- Department of Medicine-Gastroenterology, Baylor College of Medicine, Houston, TX, 77030, USA
| | - Kammal Kumar Pawa
- Chulabhorn International College of Medicine (CICM), Thammasat University, Pathum Thani, 12120, Thailand
| | - Ratha-Korn Vilaichone
- Department of Medicine, Faculty of Medicine, Center of Excellence in Digestive Diseases and Gastroenterology Unit, Thammasat University, Pathum Thani, 12120, Thailand.
- Chulabhorn International College of Medicine (CICM), Thammasat University, Pathum Thani, 12120, Thailand.
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Ratana-Amornpin S, Sanglutong L, Eiamsitrakoon T, Siramolpiwat S, Graham DY, Mahachai V. Pilot studies of vonoprazan-containing Helicobacter pylori eradication therapy suggest Thailand may be more similar to the US than Japan. Helicobacter 2023; 28:e13019. [PMID: 37723133 DOI: 10.1111/hel.13019] [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: 02/20/2023] [Revised: 08/01/2023] [Accepted: 08/27/2023] [Indexed: 09/20/2023]
Abstract
BACKGROUND Vonoprazan-containing Helicobacter pylori eradication is reliably effective in Japan. Its effectiveness in other countries remains unclear. Here, we examined vonoprazan-H. pylori therapies in Thailand. MATERIALS AND METHODS This was pilot study of four different vonoprazan containing therapies. Subjects were randomized to: 14-day dual therapy (500 mg amoxicillin q.i.d. plus 20 mg vonoprazan b.i.d.), 14-day triple therapy (amoxicillin 1 g b.i.d., slow release clarithromycin-MR, 1 g daily plus vonoprazan 20 mg b.i.d.), 7-day high-dose vonoprazan triple therapy (amoxicillin 1 g b.i.d., clarithromycin-MR 1 g daily and 60 mg vonoprazan once daily), and 14-day vonoprazan triple therapy plus bismuth (amoxicillin 1 g b.i.d., clarithromycin-MR 1 g daily, vonoprazan 20 mg b.i.d., and bismuth subsalicylate 1048 mg b.i.d.). Eradication was confirmed 4 weeks after therapy. Antimicrobial susceptibility and CYP3A4/5 genotyping were performed. RESULTS One hundred H. pylori-infected patients (mean age 54.3 ± 13 years, 51% men) were randomized. All were CYP3A4 extensive metabolizers. Cure rates with both 14-day vonoprazan dual therapy and 14-day triple therapy were low: 66.7%; 95% CI = 43-85% (14/21), and 59.3%; 95% CI = 39-78%) (16/27), respectively. In contrast, 7-day high-dose vonoprazan triple therapy and 14-day vonoprazan triple plus bismuth proved effective 92.3%; 95% CI = 75%-99% (24/26) and 96.2%; 95% CI = 80%-100% (25/26), respectively. CONCLUSION Both 14-day vonoprazan dual and triple therapy were ineffective for H. pylori eradication in Thailand. Higher dosage of vonoprazan, and/or the addition of bismuth may be required to achieve high H. pylori eradication rates. High-dose vonoprazan triple therapy and vonoprazan triple therapy adding bismuth might be used as first-line treatments in some regions with high efficacy irrespective of CYP3A4/5 genotype and clarithromycin resistance.
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Affiliation(s)
- Sarita Ratana-Amornpin
- Center of excellence in Digestive Diseases and Gastroenterology Unit, Department of Medicine, Faculty of Medicine, Thammasat University Hospital, Pathumthani, Thailand
| | - Likasith Sanglutong
- Center of excellence in Digestive Diseases and Gastroenterology Unit, Department of Medicine, Faculty of Medicine, Thammasat University Hospital, Pathumthani, Thailand
| | - Thanee Eiamsitrakoon
- Department of Medicine, Chulabhorn International College of Medicine (CICM) at Thammasat University, Pathumthani, Thailand
| | - Sith Siramolpiwat
- Center of excellence in Digestive Diseases and Gastroenterology Unit, Department of Medicine, Faculty of Medicine, Thammasat University Hospital, Pathumthani, Thailand
- Department of Medicine, Chulabhorn International College of Medicine (CICM) at Thammasat University, Pathumthani, Thailand
| | - David Y Graham
- Department of Medicine, Michael E. DeBakey Veterans Affairs Medical Center and Baylor College of Medicine, Houston, Texas, USA
| | - Varocha Mahachai
- Department of Medicine, Chulabhorn International College of Medicine (CICM) at Thammasat University, Pathumthani, Thailand
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3
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Fu J, Sun CF, He HY, Ojha SC, Shi H, Deng CL, Sheng YJ. The effect of CYP2C19 gene polymorphism on the eradication rate of Helicobacter pylori by proton pump inhibitors-containing regimens in Asian populations: a meta-analysis. Pharmacogenomics 2021; 22:859-879. [PMID: 34414773 DOI: 10.2217/pgs-2020-0127] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Premise: The effects of proton pump inhibitors (PPI) depend on metabolic enzyme CYP2C19 that has different activity due to gene polymorphism. The purpose of this meta-analysis is to determine the potential effects of CYP2C19 polymorphism on the efficiency of PPI-based treatment. Materials & methods: The PubMed, EMBASE, Cochrane Library, etc. were searched for relevant articles published in English or Chinese from inception to 31 May 2020. Finally, 26 randomized controlled trials and 15 cohort studies met the inclusion criteria and used for the meta-analysis via STATA version 15. Results: Poor metabolizer (PM) genotype Helicobacter pylori eradication rates were highest for Asian individuals receiving triple or quadruple first-line therapy based on PPIs (p < 0.05). CYP2C19 polymorphism could influence H. pylori eradication rate only in Mainland China and Japan (p < 0.05). Conclusion: PM genotype facilitates the elimination of H. pylori in Asian populations. Rabeprazole-, esomeprazole- and pantoprazole-based eradication program was less affected by the CYP2C19 polymorphism.
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Affiliation(s)
- Juan Fu
- Department of Infectious Diseases, The Affiliated Hospital of Southwest Medical University, Luzhou, 646000, China
| | - Chang-Feng Sun
- Department of Infectious Diseases, The Affiliated Hospital of Southwest Medical University, Luzhou, 646000, China.,Department of Tuberculosis, The Affiliated Hospital of Southwest Medical University, Luzhou, 646000, China.,Infection & Immunity Laboratory, The Affiliated Hospital of Southwest Medical University, Luzhou, 646000, China
| | - Hong-Yan He
- Experimental Teaching Center, School of Public Health of Southwest Medical University, Luzhou, 646000, China
| | - Suvash Chandra Ojha
- Department of Infectious Diseases, The Affiliated Hospital of Southwest Medical University, Luzhou, 646000, China.,Department of Tuberculosis, The Affiliated Hospital of Southwest Medical University, Luzhou, 646000, China.,Infection & Immunity Laboratory, The Affiliated Hospital of Southwest Medical University, Luzhou, 646000, China
| | - Han Shi
- Department of Infectious Diseases, The Affiliated Hospital of Southwest Medical University, Luzhou, 646000, China
| | - Cun-Liang Deng
- Department of Infectious Diseases, The Affiliated Hospital of Southwest Medical University, Luzhou, 646000, China.,Department of Tuberculosis, The Affiliated Hospital of Southwest Medical University, Luzhou, 646000, China.,Infection & Immunity Laboratory, The Affiliated Hospital of Southwest Medical University, Luzhou, 646000, China
| | - Yun-Jian Sheng
- Department of Infectious Diseases, The Affiliated Hospital of Southwest Medical University, Luzhou, 646000, China.,Department of Tuberculosis, The Affiliated Hospital of Southwest Medical University, Luzhou, 646000, China.,Infection & Immunity Laboratory, The Affiliated Hospital of Southwest Medical University, Luzhou, 646000, China
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Liu C, Wang Y, Shi J, Zhang C, Nie J, Li S, Zheng T. The status and progress of first-line treatment against Helicobacter pylori infection: a review. Therap Adv Gastroenterol 2021; 14:1756284821989177. [PMID: 34262609 PMCID: PMC8243100 DOI: 10.1177/1756284821989177] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/15/2020] [Accepted: 12/30/2020] [Indexed: 02/04/2023] Open
Abstract
Helicobacter pylori (HP) is a major causative agent of chronic gastritis and peptic ulcer. HP is also engaged in the development of gastric cancer and gastric mucosa-associated lymphoid tissue lymphoma. It is an important pathogenic factor in various other systemic diseases, such as vitamin B12 deficiency, iron deficiency, and idiopathic thrombocytopenia. The current consensus is that unless there is a special reason, eradication therapy should be implemented whenever HP infection is found, and it is ideally successful the first time. International guidelines recommend that under certain conditions, treatment should be personalized based on drug susceptibility testing. However, drug susceptibility testing is often not available because it is expensive, time-consuming, and difficult to obtain living tissue. Each region has separately formulated guidelines or consensuses on empirical therapy. Owing to an increasing drug resistance rate in various places, the eradication rate of proton pump inhibitor (PPI) triple therapy and sequential therapy has been affected. These regimens are rarely used; the PPI triple especially has been abandoned in most areas. Currently, radical treatment regimens for HP involve bismuth-containing quadruple therapy and concomitant therapy. However, quadruple therapy has its own limitations, such as complex drug administration. To improve the effectiveness, safety, and compliance, many clinical studies have proposed useful modified regimens, which mainly include the modified bismuth-containing quadruple regimen, high-dose dual therapy, and vonoprazan-containing regimens. Studies have shown that these emerging regimens have acceptable eradication rates and safety, and are expected to become first-line treatments in empirical therapy. However, the problem of decline in the eradication rate caused by drug resistance has not been fundamentally solved. This review not only summarizes the effectiveness of mainstream regimens in the first-line treatment of HP infection with the currently increasing antibiotic resistance rates, but also summarizes the effectiveness and safety of various emerging treatment regimens.
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Affiliation(s)
- Caiqi Liu
- Harbin Medical University, Harbin, China
| | - Yuan Wang
- Harbin Medical University, Harbin, China
| | - Jiaqi Shi
- Harbin Medical University, Harbin, China
| | | | | | - Shun Li
- Harbin Medical University, Harbin, China
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An application of continuous flow microreactor in the synthesis and extraction of rabeprazole. INTERNATIONAL JOURNAL OF CHEMICAL REACTOR ENGINEERING 2021. [DOI: 10.1515/ijcre-2020-0173] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
The oxidation of rabeprazole sulfide is a key step in the synthesis of rabeprazole, a drug for the treatment of stomach acid-related disorders. The current rabeprazole production process adopts one pot batch process, which has low reaction efficiency and poor stability. A continuous process can greatly improve the production efficiency and solve the above problems. Therefore, the reaction parameters of rabeprazole in microreactor were explored through laboratory experiments to explore the possibility of continuous production of rabeprazole. Rabeprazole sodium was synthesized by using rabeprazole thioether as a raw material and sodium hypochlorite solution as the oxidant. Oxidation, quenching, acid-base regulation and extraction were completed continuously in the microreactor. Rabeprazole solution with a purity of 98.78% (±0.13%) can be obtained continuously in 56 s, whereas intermittent production lasted for at least 2 h. Thus, the microreactor can effectively improve the oxidation synthesis efficiency of rabeprazole, and provide reference for the realization of other reactions in the microreactor.
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6
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Kelley BR, Lu J, Haley KP, Gaddy JA, Johnson JG. Metal homeostasis in pathogenic Epsilonproteobacteria: mechanisms of acquisition, efflux, and regulation. Metallomics 2021; 13:mfaa002. [PMID: 33570133 PMCID: PMC8043183 DOI: 10.1093/mtomcs/mfaa002] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2020] [Revised: 11/25/2020] [Accepted: 12/03/2020] [Indexed: 12/14/2022]
Abstract
Epsilonproteobacteria are a diverse class of eubacteria within the Proteobacteria phylum that includes environmental sulfur-reducing bacteria and the human pathogens, Campylobacter jejuni and Helicobacter pylori. These pathogens infect and proliferate within the gastrointestinal tracts of multiple animal hosts, including humans, and cause a variety of disease outcomes. While infection of these hosts provides nutrients for the pathogenic Epsilonproteobacteria, many hosts have evolved a variety of strategies to either sequester metals from the invading pathogen or exploit the toxicity of metals and drive their accumulation as an antimicrobial strategy. As a result, C. jejuni and H. pylori have developed mechanisms to sense changes in metal availability and regulate their physiology in order to respond to either metal limitation or accumulation. In this review, we will discuss the challenges of metal availability at the host-pathogen interface during infection with C. jejuni and H. pylori and describe what is currently known about how these organisms alter their gene expression and/or deploy bacterial virulence factors in response to these environments.
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Affiliation(s)
- Brittni R Kelley
- Department of Microbiology, University of Tennessee, Knoxville, TN, USA
| | - Jacky Lu
- Department of Pathology, Microbiology and Immunology, Vanderbilt University, Nashville, TN, USA
| | - Kathryn P Haley
- Department of Biology, Grand Valley State University, Grand Rapids, MI, USA
| | - Jennifer A Gaddy
- Department of Pathology, Microbiology and Immunology, Vanderbilt University, Nashville, TN, USA
- Tennessee Valley Healthcare Systems, Department of Veterans Affairs, Nashville, TN, USA
- Department of Medicine, Vanderbilt University Medical Center, Nashville, TN, USA
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O'Connor A, Furuta T, Gisbert JP, O'Morain C. Review - Treatment of Helicobacter pylori infection 2020. Helicobacter 2020; 25 Suppl 1:e12743. [PMID: 32918350 DOI: 10.1111/hel.12743] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
This review summarizes important studies regarding Helicobacter pylori therapy published from April 2019 to April 2020. The main themes that emerge involve studies assessing antibiotic resistance, and there is also growing momentum behind the utility of vonoprazan as an alternative to proton pump inhibitor (PPI) therapy and also bismuth-based regimens as a first-line regimen. Antibiotic resistance is rising wherever it is being assessed, and clarithromycin resistance in particular has reached a point where it may no longer be a viable therapy without previous testing in many regions of the world. The evidence for the efficacy of a bismuth-based quadruple therapy as a first-line therapy is now very clearly established, and there is substantial evidence that it is the best performing first-line therapy. The utility of vonoprazan as an alternative to PPI therapy, especially in resistant and difficult-to-treat groups, has also been considered in great detail this year, and it may offer an opportunity in the near future to reduce the problem of antibiotic resistance.
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Affiliation(s)
- Anthony O'Connor
- Department of Gastroenterology, Tallaght University Hospital/Trinity College, Dublin, Ireland
| | - Takahisa Furuta
- The Center for Clinical Research, Hamamatsu University School of Medicine, Hamamatsu, Japan
| | - Javier P Gisbert
- Gastroenterology Unit, Hospital Universitario de La Princesa, Instituto de Investigación Sanitaria Princesa (IIS-IP), Universidad Autónoma de Madrid (UAM), Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas (CIBEREHD), Madrid, Spain
| | - Colm O'Morain
- Department of Gastroenterology, Tallaght University Hospital/Trinity College, Dublin, Ireland
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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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9
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Abstract
The main challenge in the field of Helicobacter pylori (H. pylori) infection is antibiotic resistance, which influences the efficacy of eradication regimens. Bismuth-containing quadruple therapy has been confirmed as an effective regimen for eradicating H. pylori, especially in strains with antibiotic resistance. High-dose proton-pump inhibitor-amoxicillin dual therapy could decrease the use of unnecessary antibiotics, which is a promising alternative approach. Adjuvant therapy (specific probiotic or vitamin) also showed good results, although more evidence is needed. Novel anti-H. pylori drugs are needed, and the establishment of the H. pylori database is an effective way to acknowledge the real-time information of H. pylori management. This review provides the recent progress of H. pylori treatment, and further studies are needed to address the role of different regimens in improving H. pylori eradication rate, especially in strains with antibiotics resistance.
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Affiliation(s)
- Yi Hu
- Department of Gastroenterology, The First Affiliated Hospital of Nanchang University, Nanchang, Jiangxi 330006, China
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