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Dong H, Luo Y, Liu D, Du X, Du H. Efficacy of Baclofen as Add-on Therapy for Refractory Gastroesophageal Reflux Disease: A Meta-analysis. J Clin Gastroenterol 2024:00004836-990000000-00304. [PMID: 38869961 DOI: 10.1097/mcg.0000000000002021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/16/2024] [Accepted: 04/16/2024] [Indexed: 06/15/2024]
Abstract
OBJECTIVES As a GABAB receptor agonist, baclofen has demonstrated efficacy in alleviating symptoms of refractory gastroesophageal reflux disease (r-GERD). This meta-analysis aims to evaluate the safety and effectiveness of baclofen as an add-on therapy for this condition. METHOD We conducted a comprehensive search of the PubMed, Embase, and Web of Science databases for studies published up until October 2023. Subsequently, we performed a meta-analysis encompassing all eligible trials. RESULTS From 719 records, 10 studies were included, most of these studies were moderate risk. The findings demonstrated that the addition of baclofen as a supplementary treatment effectively improves symptoms (GERD Q score) in r-GERD (standardized mean difference=-0.78, 95% CI: -1.06 to -0.51, I2=0%). The addition of this treatment also resulted in a decrease in the frequency of nonacidic reflux episodes (standardized mean difference=-0.93, 95% CI: -1.49 to -0.37, I2=63%) and an improvement in DeMeester scores (standardized mean difference=-0.82, 95% CI: -1.61 to -0.04, I2=81%) among patients with r-GERD when compared with the use of proton pump inhibitor (PPI) drugs alone. However, no significant disparity was observed in terms of reducing acid reflux episodes (standardized mean difference=-0.12, 95% CI: -0.49 to 0.19, I2=0%) and proximal reflux (standardized mean difference=-0.47, 95% CI: -1.08 to 0.14, I2=60%). CONCLUSION Baclofen as an add-on treatment can effectively improve the symptoms of patients with r-GERD and reduce the incidence of nonacidic reflux and improve DeMeester score. However, long-term use of baclofen leads to an increased incidence of side effects and is not effective in reducing the occurrence of acid reflux.
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Affiliation(s)
- Hongyi Dong
- Department of General Surgery, Xuanwu Hospital, Capital Medical University, Beijing, China
| | - Ying Luo
- Department of General Surgery, Xuanwu Hospital, Capital Medical University, Beijing, China
| | - Diangang Liu
- Department of General Surgery, Xuanwu Hospital, Capital Medical University, Beijing, China
| | - Xing Du
- Department of General Surgery, Xuanwu Hospital, Capital Medical University, Beijing, China
| | - Haijun Du
- Department of General Surgery, Xiong'an Xuanwu Hospital, Xiong'an, Hebei Province, China
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Davis TA, Gyawali CP. Refractory Gastroesophageal Reflux Disease: Diagnosis and Management. J Neurogastroenterol Motil 2024; 30:17-28. [PMID: 38173155 PMCID: PMC10774805 DOI: 10.5056/jnm23145] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/11/2023] [Accepted: 10/16/2023] [Indexed: 01/05/2024] Open
Abstract
Gastroesophageal reflux disease (GERD) is common, with increasing worldwide disease prevalence and high economic burden. A significant number of patients will remain symptomatic following an empiric proton pump inhibitor (PPI) trial. Persistent symptoms despite PPI therapy are often mislabeled as refractory GERD. For patients with no prior GERD evidence (unproven GERD), testing is performed off antisecretory therapy to identify objective evidence of pathologic reflux using criteria outlined by the Lyon consensus. In proven GERD, differentiation between refractory symptoms (persisting symptoms despite optimized antisecretory therapy) and refractory GERD (abnormal reflux metrics on ambulatory pH impedance monitoring and/or persistent erosive esophagitis on endoscopy while on optimized PPI therapy) can direct subsequent management. While refractory symptoms may arise from esophageal hypersensitivity or functional heartburn, proven refractory GERD requires personalization of the management approach, tapping from an array of non-pharmacologic, pharmacologic, endoscopic, and surgical interventions. Proper diagnosis and management of refractory GERD is critical to mitigate undesirable long-term complications such as strictures, Barrett's esophagus, and esophageal adenocarcinoma. This review outlines the diagnostic workup of patients presenting with refractory GERD symptoms, describes the distinction between unproven and proven GERD, and provides a comprehensive review of the current treatment strategies available for the management of refractory GERD.
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Affiliation(s)
- Trevor A Davis
- Division of Pediatric Gastroenterology, Washington University School of Medicine, Saint Louis Children’s Hospital, St. Louis, MO, USA
| | - C Prakash Gyawali
- Division of Gastroenterology, Washington University School of Medicine, St. Louis, MO, USA
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Arabpour E, Khoshdel S, Akhgarzad A, Abdi M, Tabatabaie N, Alijanzadeh D, Abdehagh M. Baclofen as a therapeutic option for gastroesophageal reflux disease: A systematic review of clinical trials. Front Med (Lausanne) 2023; 10:997440. [PMID: 36873860 PMCID: PMC9981648 DOI: 10.3389/fmed.2023.997440] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2022] [Accepted: 02/03/2023] [Indexed: 02/19/2023] Open
Abstract
Background The main components of gastroesophageal reflux disease (GERD) management include a combination of medications and lifestyle modifications; Nevertheless, based on the severity of symptoms and their response to medications, other treatments could be considered. Baclofen has been demonstrated in studies to relieve GERD symptoms. The current study aimed to precisely address the effects of baclofen on the treatment of GERD and its characteristics. Methods A systematic search was carried out in Pubmed/Medline, Cochrane CENTRAL, Scopus, Google Scholar, Web of Science, and clinicaltrials.gov up to December 10, 2021. The search terms included baclofen, GABA agonists, GERD, and reflux. Results We selected 26 papers that matched the inclusion criteria after examining 727 records. Studies were classified into four categories based on the study population and reported outcomes: (1) adults, (2) children, (3) patients with gastroesophageal reflux-induced chronic cough, (4) hiatal hernia patients. The results revealed that baclofen can significantly improve reflux symptoms and pH-monitoring and manometry findings to different degrees in all four mentioned categories; although its effect on pH-monitoring parameters seems less significant than the other parameters. Mild neurological and mental status deterioration were the most reported side effects. However, side effects occurred in a portion of less than 5% of short-term users and nearly 20% of long-term users. Conclusion In PPI-resistant patients, a trial of adding baclofen to the PPI may be helpful. Baclofen therapies may be more beneficial for symptomatic GERD patients who also report concurrent conditions including alcohol use disorder, non-acid reflux, or obesity. Systematic review registration https://clinicaltrials.gov/.
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Affiliation(s)
- Erfan Arabpour
- Department of Gastroenterology and Hepatology, Imam Hossein Hospital, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Sina Khoshdel
- Department of Internal Medicine, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Ali Akhgarzad
- Department of Internal Medicine, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Mohammadamin Abdi
- School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Negin Tabatabaie
- Department of Internal Medicine, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Dorsa Alijanzadeh
- School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Mohammad Abdehagh
- Department of Gastroenterology and Hepatology, Imam Hossein Hospital, Shahid Beheshti University of Medical Sciences, Tehran, Iran
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Pauwels A, Raymenants K, Geeraerts A, Boecxstaens V, Masuy I, Broers C, Vanuytsel T, Tack J. Clinical trial: a controlled trial of baclofen add-on therapy in PPI-refractory gastro-oesophageal reflux symptoms. Aliment Pharmacol Ther 2022; 56:231-239. [PMID: 35665521 DOI: 10.1111/apt.17068] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/21/2021] [Revised: 01/06/2022] [Accepted: 05/20/2022] [Indexed: 01/30/2023]
Abstract
BACKGROUND Proton pump inhibitors (PPI) have no effect on non-acid reflux events which can continue to provoke gastro-oesophageal reflux disease (GERD) symptoms. Baclofen, a γ-aminobutyric acid agonist, can decrease non-acid reflux but its symptomatic benefit in refractory GERD symptoms is understudied. AIMS To assess the efficacy of baclofen 10 mg t.i.d. vs placebo as add-on therapy in PPI-refractory GERD symptoms, in a randomised, double-blind, placebo-controlled study. METHODS Patients with persisting typical GERD symptoms on b.i.d. PPI therapy were randomised to 4 weeks of baclofen 10 mg or placebo t.i.d. Before and after treatment, patients underwent 24 h impedance-pH monitoring on-PPI. Throughout the study, patients filled out ReQuest diaries. Data were analysed using mixed models. RESULTS About 60 patients were included (age 47.5 years [range 19-73], 41f/19 m), 31 patients were randomised to baclofen. One patient withdrew consent and five in the baclofen group stopped treatment due to side effects. There was a trend towards a better response for general wellbeing in the baclofen-treated group compared to placebo (p = 0.06). When subdividing patients according to symptom association probability (SAP), only the SAP+ (n = 25) group improved significantly with baclofen (pcorr = 0.02), and worsened with placebo (pcorr = 0.008). The total number of reflux events decreased over time (p = 0.01), mainly due to the baclofen condition (pcorr = 0.1). The number of reflux events with a high proximal extent dropped significantly after baclofen (pcorr = 0.009), but not placebo. CONCLUSION Baclofen decreases several reflux parameters in PPI refractory GERD symptoms, but pH-impedance monitoring is necessary before treatment as only SAP+ patients experience clinical benefit after 4 weeks.
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Affiliation(s)
- Ans Pauwels
- Translational Research Center for Gastrointestinal Disorders (TARGID), Catholic University of Leuven, Leuven, Belgium
| | - Karlien Raymenants
- Translational Research Center for Gastrointestinal Disorders (TARGID), Catholic University of Leuven, Leuven, Belgium
| | - Annelies Geeraerts
- Translational Research Center for Gastrointestinal Disorders (TARGID), Catholic University of Leuven, Leuven, Belgium
| | - Veerle Boecxstaens
- Translational Research Center for Gastrointestinal Disorders (TARGID), Catholic University of Leuven, Leuven, Belgium
- Oncological and Vascular Access Surgery, Department of Surgical Oncology, University Hospitals Leuven, Leuven, Belgium
- Department of Oncology, KU Leuven, Leuven, Belgium
| | - Imke Masuy
- Translational Research Center for Gastrointestinal Disorders (TARGID), Catholic University of Leuven, Leuven, Belgium
| | - Charlotte Broers
- Translational Research Center for Gastrointestinal Disorders (TARGID), Catholic University of Leuven, Leuven, Belgium
| | - Tim Vanuytsel
- Translational Research Center for Gastrointestinal Disorders (TARGID), Catholic University of Leuven, Leuven, Belgium
- Department of Gastroenterology and Hepatology, University Hospitals Leuven, Leuven, Belgium
| | - Jan Tack
- Translational Research Center for Gastrointestinal Disorders (TARGID), Catholic University of Leuven, Leuven, Belgium
- Department of Gastroenterology and Hepatology, University Hospitals Leuven, Leuven, Belgium
- Department of Internal Medicine & Clinical Nutrition, Institute of Medicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
- Rome Foundation, Falls of Neuse, Chapel Hill, North Carolina, USA
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Zheng Z, Shang Y, Wang N, Liu X, Xin C, Yan X, Zhai Y, Yin J, Zhang J, Zhang Z. Current Advancement on the Dynamic Mechanism of Gastroesophageal Reflux Disease. Int J Biol Sci 2021; 17:4154-4164. [PMID: 34803489 PMCID: PMC8579455 DOI: 10.7150/ijbs.65066] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2021] [Accepted: 09/19/2021] [Indexed: 12/13/2022] Open
Abstract
Gastroesophageal reflux disease (GERD) is a common clinical disease associated with upper gastrointestinal motility disorders. Recently, with improvements in living standards and changes in lifestyle and dietary habits, the incidence of GERD has been increasing yearly. However, the mechanism of GERD has not been fully elucidated due to its complex pathogenesis, and this had led to unsatisfactory therapeutic outcomes. Currently, the occurrence and development of GERD involve multiple factors. Its pathogenesis is mainly thought to be related to factors, such as lower esophageal sphincter pressure, transient lower esophageal sphincter relaxation, crural diaphragmatic dysfunction, hiatus hernia, and impaired esophageal clearance. Therefore, explaining the pathogenesis of GERD more clearly and systematically, exploring potential and effective therapeutic targets, and choosing the best treatment methods have gradually become the focus of scholars' attention. Herein, we reviewed current advancements in the dynamic mechanism of GERD to better counsel patients on possible treatment options.
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Affiliation(s)
- Zhi Zheng
- Department of General Surgery, Beijing Friendship Hospital, Capital Medical University, Beijing, China
- Beijing Key Laboratory of Cancer Invasion and Metastasis Research, Beijing, China
- National Clinical Research Center for Digestive Diseases, Beijing, China
- Beijing Institute of Clinical Medicine, Beijing, China
| | - Yuxi Shang
- Department of Hematology, Fuxing Hospital, Eighth Clinical Medical College, Capital Medical University, Beijing, China
| | - Ning Wang
- Department of Anesthesiology, Beijing Friendship Hospital, Capital Medical University, Beijing, China
| | - Xiaoye Liu
- Department of General Surgery, Beijing Friendship Hospital, Capital Medical University, Beijing, China
- Beijing Key Laboratory of Cancer Invasion and Metastasis Research, Beijing, China
- National Clinical Research Center for Digestive Diseases, Beijing, China
- Beijing Institute of Clinical Medicine, Beijing, China
| | - Chenglin Xin
- Department of General Surgery, Beijing Friendship Hospital, Capital Medical University, Beijing, China
- Beijing Key Laboratory of Cancer Invasion and Metastasis Research, Beijing, China
- National Clinical Research Center for Digestive Diseases, Beijing, China
- Beijing Institute of Clinical Medicine, Beijing, China
| | - Xiaosheng Yan
- Department of General Surgery, Beijing Friendship Hospital, Capital Medical University, Beijing, China
- Beijing Key Laboratory of Cancer Invasion and Metastasis Research, Beijing, China
- National Clinical Research Center for Digestive Diseases, Beijing, China
- Beijing Institute of Clinical Medicine, Beijing, China
| | - Yuhao Zhai
- Department of General Surgery, Beijing Friendship Hospital, Capital Medical University, Beijing, China
- Beijing Key Laboratory of Cancer Invasion and Metastasis Research, Beijing, China
- National Clinical Research Center for Digestive Diseases, Beijing, China
- Beijing Institute of Clinical Medicine, Beijing, China
| | - Jie Yin
- Department of General Surgery, Beijing Friendship Hospital, Capital Medical University, Beijing, China
- Beijing Key Laboratory of Cancer Invasion and Metastasis Research, Beijing, China
- National Clinical Research Center for Digestive Diseases, Beijing, China
- Beijing Institute of Clinical Medicine, Beijing, China
| | - Jun Zhang
- Department of General Surgery, Beijing Friendship Hospital, Capital Medical University, Beijing, China
- Beijing Key Laboratory of Cancer Invasion and Metastasis Research, Beijing, China
- National Clinical Research Center for Digestive Diseases, Beijing, China
- Beijing Institute of Clinical Medicine, Beijing, China
| | - Zhongtao Zhang
- Department of General Surgery, Beijing Friendship Hospital, Capital Medical University, Beijing, China
- Beijing Key Laboratory of Cancer Invasion and Metastasis Research, Beijing, China
- National Clinical Research Center for Digestive Diseases, Beijing, China
- Beijing Institute of Clinical Medicine, Beijing, China
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Zhang M, Zhu Y, Dong R, Qiu Z. Gabapentin versus baclofen for treatment of refractory gastroesophageal reflux-induced chronic cough. J Thorac Dis 2020; 12:5243-5250. [PMID: 33145100 PMCID: PMC7578446 DOI: 10.21037/jtd-2020-icc-002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Refractory gastroesophageal reflux-induced chronic cough (GERC) is a special type of gastroesophageal reflux disease (GERD) with predominant cough resistant to pragmatic standard anti-reflux therapy including antisecretory agents alone or in combination with promotility agents but with a favorable response to intensified anti-reflux treatment. The condition is not rare and is difficult to treat. Neuromodulators such as baclofen and gabapentin are considered potential therapeutic options for refractory GERC. Limited data indicate that gabapentin and baclofen could attenuate the cough symptom in patients with refractory GERC by blockade of gastroesophageal reflux or by direct antitussive effects. However, no study has compared the efficacy of these two drugs in treatment of refractory GERC. In an open-labeled randomized clinical study, we demonstrated that, as add-on therapy, gabapentin and baclofen had a similar prevalence of therapeutic success for suspected refractory GERC but gabapentin may be more preferable because of its fewer central side effects. The efficacy of baclofen and gabapentin was suboptimal, so further studies are needed to select the patients with refractory GERC suitable for precise treatment using these two neuromodulators.
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Affiliation(s)
- Mengru Zhang
- Department of Pulmonary and Critical Care Medicine, Tongji Hospital, Tongji University School of Medicine, Shanghai, China
| | - Yiqing Zhu
- Department of Pulmonary and Critical Care Medicine, Tongji Hospital, Tongji University School of Medicine, Shanghai, China
| | - Ran Dong
- Department of Pulmonary and Critical Care Medicine, Tongji Hospital, Tongji University School of Medicine, Shanghai, China
| | - Zhongmin Qiu
- Department of Pulmonary and Critical Care Medicine, Tongji Hospital, Tongji University School of Medicine, Shanghai, China
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Abstract
PURPOSE OF REVIEW This narrative review focuses on the presentation, contributing factors, diagnosis, and treatment of non-acid reflux. We also propose algorithms for diagnosis and treatment. RECENT FINDINGS There is a paucity of recent data regarding non-acid reflux. The recent Porto and Lyon consensus statements do not fully address non-acid reflux or give guidance on classification. However, recent developments in the lung transplantation field, as well as older data in the general population, argue for the importance of non-acid reflux. Extrapolating from the Porto and Lyon consensus, we generally classify pathologic non-acid reflux as impedance events > 80, acid exposure time < 4%, and positive symptom correlation on a standard 24-h pH/impedance test. Other groups not meeting this criteria also deserve consideration depending on the clinical situation. Potential treatments include lifestyle modification, increased acid suppression, alginates, treatment of esophageal hypersensitivity, baclofen, buspirone, prokinetics, and anti-reflux surgery in highly selected individuals. More research is needed to clarify appropriate classification, with subsequent focus on targeted treatments.
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Affiliation(s)
- Thomas A Zikos
- Stanford Multidimensional Program for Innovation and Research in the Esophagus (S-MPIRE), Division of Gastroenterology and Hepatology, Stanford University School of Medicine, 430 Broadway Street, Pavilion C, 3rd Floor, GI suite, Redwood City, CA, 94063, USA.
| | - John O Clarke
- Stanford Multidimensional Program for Innovation and Research in the Esophagus (S-MPIRE), Division of Gastroenterology and Hepatology, Stanford University School of Medicine, 430 Broadway Street, Pavilion C, 3rd Floor, GI suite, Redwood City, CA, 94063, USA
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Hungin APS, Molloy-Bland M, Scarpignato C. Revisiting Montreal: New Insights into Symptoms and Their Causes, and Implications for the Future of GERD. Am J Gastroenterol 2019; 114:414-421. [PMID: 30323266 PMCID: PMC6434899 DOI: 10.1038/s41395-018-0287-1] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/03/2018] [Accepted: 08/13/2018] [Indexed: 12/11/2022]
Abstract
The Montreal definition of gastroesophageal reflux disease (GERD) provided a rationale for acid suppression medication without investigation, thus enhancing the management of the substantial symptom burden in these patients. Increased proton-pump inhibitor use has also highlighted their limitations, with one third of "typical" symptoms known to be refractory. Most refractory symptoms are ascribed to reflux hypersensitivity (RH) and functional heartburn (FH). RH may be caused by impaired esophageal mucosal barrier function and sensitization of peripheral esophageal receptors. Central sensitization may also contribute to the perception of non-pathologic reflux in RH, and the perception of physiological stimuli in FH. Importantly, mechanisms underlying GERD, RH, and FH are (in theory) not mutually exclusive, further complicating patient management. Methods used to distinguish GERD from RH and FH are impractical for use in epidemiological studies and pragmatic care and may have limited diagnostic accuracy. This is impeding accurate prevalence estimates and risk factor determination and the identification of new therapies. Direct assessment of mucosal barrier function by measuring impedance is a promising candidate for improved diagnosis. Ultimately though the concept of GERD as a composite, symptom-based entity needs re-evaluation, so that new understandings of upper GI symptoms can direct more precise management.
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Affiliation(s)
- A. Pali S. Hungin
- The Institute of Health and Society, Faculty of Medical Sciences, Newcastle University, Newcastle upon Tyne, UK
| | | | - Carmelo Scarpignato
- Clinical Pharmacology & Digestive Pathophysiology Unit, Department of Clinical & Experimental Medicine, University of Parma, Parma, Italy
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9
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Callaway JP, Vaezi MF. Hiatal and Paraesophageal Hernias. Clin Gastroenterol Hepatol 2018; 16:810-813. [PMID: 29306040 DOI: 10.1016/j.cgh.2017.12.045] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/10/2017] [Accepted: 12/19/2017] [Indexed: 12/21/2022]
Affiliation(s)
- James P Callaway
- Division of Gastroenterology and Hepatology, University of Alabama at Birmingham, Birmingham, Alabama.
| | - Michael F Vaezi
- Division of Gastroenterology, Hepatology, and Nutrition, Vanderbilt University Medical Center, Nashville, Tennessee
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10
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Gallusi G, Pontone S. Treatment of PPI-resistant gastro-oesophageal reflux: A systematic review. Arab J Gastroenterol 2018; 19:51-55. [PMID: 29935866 DOI: 10.1016/j.ajg.2018.02.007] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/23/2016] [Revised: 05/10/2017] [Accepted: 02/20/2018] [Indexed: 02/08/2023]
Abstract
BACKGROUND AND STUDY AIMS Several studies have demonstrated the superiority of proton-pump inhibitors (PPIs) in resolving erosive gastro-oesophageal reflux disease (GORD). However, this first line of treatment can fail to control symptoms in around 30% of cases, especially in the presence of non-erosive GORD. In situations where the first line of treatment fails, there is a lack of concordance regarding the best strategy to apply. This study presents a systematic review of the trials which have tested second-line treatments after PPI failure. METHODS The study was conducted according to the PRISMA statement. The systematic review included medical trials written in English which were published between 2000 and 2016 and were retrieved from PubMed and Scopus using the keywords 'PPI-resistant gastro-oesophageal reflux', 'alginate AND gastro-oesophageal reflux', 'hyaluronic acid AND gastro-oesophageal reflux', 'prokinetics AND gastro-oesophageal reflux', 'sucralfate AND gastro-oesophageal reflux' and 'baclofen AND gastro-oesophageal reflux'. RESULTS Ten randomised and non-randomised studies were included, which included 1515 patients of both sexes (mean age = 49.19 years, age range = 18-85, males = 700; 46.2%). CONCLUSIONS A personalised choice of the best treatment for PPI-resistant GORD should be based on the results of an upper endoscopy and pH/MII monitoring. For patients in situations where the first line of treatment fails, we encourage the execution of trials for testing double doses of PPIs against alternative medicaments.
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Affiliation(s)
- Giulia Gallusi
- Division of Gastroenterology, Department of Clinical Medicine "Sapienza" University of Rome, Italy
| | - Stefano Pontone
- Department of Surgical Sciences, "Sapienza" University of Rome, Italy.
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11
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Mermelstein J, Chait Mermelstein A, Chait MM. Proton pump inhibitor-refractory gastroesophageal reflux disease: challenges and solutions. Clin Exp Gastroenterol 2018; 11:119-134. [PMID: 29606884 PMCID: PMC5868737 DOI: 10.2147/ceg.s121056] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
A significant percentage of patients with gastroesophageal reflux disease (GERD) will not respond to proton pump inhibitor (PPI) therapy. The causes of PPI-refractory GERD are numerous and diverse, and include adherence, persistent acid, functional disorders, nonacid reflux, and PPI bioavailability. The evaluation should start with a symptom assessment and may progress to imaging, endoscopy, and monitoring of esophageal pH, impedance, and bilirubin. There are a variety of pharmacologic and procedural interventions that should be selected based on the underlying mechanism of PPI failure. Pharmacologic treatments can include antacids, prokinetics, alginates, bile acid binders, reflux inhibitors, and antidepressants. Procedural options include laparoscopic fundoplication and LINX as well as endoscopic procedures, such as transoral incisionless fundoplication and Stretta. Several alternative and complementary treatments of possible benefit also exist.
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Affiliation(s)
- Joseph Mermelstein
- Gasteroenterology and Nutrition Service, Department of Medicine, Memorial Sloan Kettering Cancer Center, New York, NY, USA
| | - Alanna Chait Mermelstein
- Department of Psychiatry and Behavioral Sciences, Memorial Sloan Kettering Cancer Center, New York, NY, USA
| | - Maxwell M Chait
- Department of Medicine, Columbia University College of Physicians and Surgeons, New York, NY, USA
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12
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Gyawali CP, Fass R. Management of Gastroesophageal Reflux Disease. Gastroenterology 2018; 154:302-318. [PMID: 28827081 DOI: 10.1053/j.gastro.2017.07.049] [Citation(s) in RCA: 170] [Impact Index Per Article: 28.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/19/2017] [Revised: 07/29/2017] [Accepted: 07/31/2017] [Indexed: 02/06/2023]
Abstract
Management of gastroesophageal reflux disease (GERD) commonly starts with an empiric trial of proton pump inhibitor (PPI) therapy and complementary lifestyle measures, for patients without alarm symptoms. Optimization of therapy (improving compliance and timing of PPI doses), or increasing PPI dosage to twice daily in select circumstances, can reduce persistent symptoms. Patients with continued symptoms can be evaluated with endoscopy and tests of esophageal physiology, to better determine their disease phenotype and optimize treatment. Laparoscopic fundoplication, magnetic sphincter augmentation, and endoscopic therapies can benefit patients with well-characterized GERD. Patients with functional diseases that overlap with or mimic GERD can also be treated with neuromodulators (primarily antidepressants), or psychological interventions (psychotherapy, hypnotherapy, cognitive and behavioral therapy). Future approaches to treatment of GERD include potassium-competitive acid blockers, reflux-reducing agents, bile acid binders, injection of inert substances into the esophagogastric junction, and electrical stimulation of the lower esophageal sphincter.
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Affiliation(s)
- C Prakash Gyawali
- Division of Gastroenterology, Washington University School of Medicine, St. Louis, Missouri
| | - Ronnie Fass
- Division of Gastroenterology and Hepatology, Esophageal and Swallowing Center, Case Western Reserve University, MetroHealth Medical Center, Cleveland, Ohio.
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13
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Xu X, Yu L, Chen Q, Lv H, Qiu Z. Diagnosis and treatment of patients with nonacid gastroesophageal reflux-induced chronic cough. JOURNAL OF RESEARCH IN MEDICAL SCIENCES 2016; 20:885-92. [PMID: 26759577 PMCID: PMC4696375 DOI: 10.4103/1735-1995.170625] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Gastroesophageal reflux (GER) is one of the most common causes of chronic cough, and chronic cough due to GER represents a subtype of GER-related diseases. Gastroesophageal reflux-induced chronic cough (GERC) can be divided into two subgroups based on the pH of the GER. Nonacid GERC is less common than acid GERC, and its diagnosis and treatment strategy have not been standardized. However, nonacid GERC usually presents with its unique set of characteristics and features upon diagnosis and treatment in the clinic. Although the underlying molecular mechanism of nonacid GERC is not fully understood, it is considered to be associated with reflux theory, reflex theory and airway hypersensitivity. Multi-channel intraluminal impedance combined with pH monitoring is a promising new technique that can detect both acid and nonacid reflux, and our findings as well as those of others have shown its usefulness in diagnosing nonacid GERC. Development of new diagnostic techniques has led to an increased rate of nonacid GERC diagnosis. We summarize our experience in the diagnosis and treatment of nonacid GERC and provide a guide for future therapeutic approaches.
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Affiliation(s)
- Xianghuai Xu
- Department of Respiratory Medicine, Tongji Hospital, Tongji University School of Medicine, Shanghai 200065, China
| | - Li Yu
- Department of Respiratory Medicine, Tongji Hospital, Tongji University School of Medicine, Shanghai 200065, China
| | - Qiang Chen
- Department of Respiratory Medicine, Tongji Hospital, Tongji University School of Medicine, Shanghai 200065, China
| | - Hanjing Lv
- Department of Respiratory Medicine, Tongji Hospital, Tongji University School of Medicine, Shanghai 200065, China
| | - Zhongmin Qiu
- Department of Respiratory Medicine, Tongji Hospital, Tongji University School of Medicine, Shanghai 200065, China
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Refractory chronic cough due to gastroesophageal reflux: Definition, mechanism and management. World J Methodol 2015; 5:149-56. [PMID: 26413488 PMCID: PMC4572028 DOI: 10.5662/wjm.v5.i3.149] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/02/2015] [Revised: 07/06/2015] [Accepted: 07/11/2015] [Indexed: 02/06/2023] Open
Abstract
Refractory chronic cough due to gastroesophageal reflux is a troublesome condition unresponsive to the standard medical anti-reflux therapy. Its underlying mechanisms may include incomplete acid suppression, non-acid reflux, transient lower esophageal sphincter relaxations and esophageal hypersensitivity. The diagnosis of this disorder depends on both the findings of multi-channel intraluminal impedance-pH monitoring and the subsequent intensified anti-reflux therapy. The strategies of pharmacological treatment for refractory chronic cough due to reflux include the optimization of proton pump inhibitors and add-on therapies with histamine H2 receptor antagonists, baclofen and gabapentin. However, the further study is needed to satisfy its management.
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Curcic J, Schwizer A, Kaufman E, Forras-Kaufman Z, Banerjee S, Roy S, Pal A, Hebbard GS, Boesiger P, Fried M, Steingoetter A, Schwizer W, Fox M. Effects of baclofen on the functional anatomy of the oesophago-gastric junction and proximal stomach in healthy volunteers and patients with GERD assessed by magnetic resonance imaging and high-resolution manometry: a randomised controlled double-blind study. Aliment Pharmacol Ther 2014; 40:1230-40. [PMID: 25230154 DOI: 10.1111/apt.12956] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/24/2014] [Revised: 05/23/2014] [Accepted: 08/25/2014] [Indexed: 12/14/2022]
Abstract
BACKGROUND The mechanism of reflux protection may involve a 'flap valve' at the oesophago-gastric junction (OGJ). AIM To assess the effects of baclofen, a gamma-aminobutyric acid receptor type-B (GABA-B) agonist known to suppress reflux events, on the 'functional anatomy' of the OGJ and proximal stomach after a large test meal. METHODS Twelve healthy volunteers (HVs) and 12 patients with gastro-oesophageal reflux disease (GERD); with erosive oesophagitis or pathological oesophageal acid exposure completed a randomised, double-blind, cross-over study. On 2 test days participants received 40-mg baclofen or placebo before ingestion of a large test meal. OGJ structure and function were assessed by high-resolution manometry (HRM) and magnetic resonance imaging (MRI) using validated methods. Measurements of the oesophago-gastric angle were derived from three-dimensional models reconstructed from anatomic MRI images. Cine-MRI and HRM identified postprandial reflux events. Mixed model analysis and Wilcoxon rank signed tests assessed differences between participant groups and treatment conditions. RESULTS In both HVs and GERD patients, baclofen reduced the frequency of postprandial reflux events. The oesophago-gastric insertion angle in GERD patients was reduced (-4.1 ± 1.8, P = 0.025), but was unchanged in healthy controls. In both study groups, baclofen augmented lower oesophageal sphincter (LES) pressure (HVs: +7.3 ± 1.8 mmHg, P < 0.0001, GERD: +4.50 ± 1.49 mmHg, P < 0.003) and increased LES length (HVs: +0.48 ± 0.11 cm, P < 0.0003, GERD: +0.35 ± 0.06 cm, P < 0.0001). CONCLUSIONS Baclofen inhibits transient LES relaxations and augments LES pressure and length. Additionally, baclofen has effects on the 'functional anatomy' of the OGJ and proximal stomach in GERD patients, which may suppress reflux by means of a 'flap valve' mechanism.
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Affiliation(s)
- J Curcic
- Institute for Biomedical Engineering, University and ETH Zurich, Zurich, Switzerland; Division of Gastroenterology and Hepatology, University Hospital Zurich, Zurich, Switzerland
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16
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The effects of baclofen for the treatment of gastroesophageal reflux disease: a meta-analysis of randomized controlled trials. Gastroenterol Res Pract 2014; 2014:307805. [PMID: 25389436 PMCID: PMC4217339 DOI: 10.1155/2014/307805] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/21/2014] [Revised: 08/08/2014] [Accepted: 08/27/2014] [Indexed: 12/14/2022] Open
Abstract
Objectives. Baclofen can relieve gastroesophageal reflux-related symptoms in healthy subjects and gastroesophageal reflux disease (GERD) patients by reducing the incidence of transient lower esophageal sphincter relaxation. This meta-analysis aimed to evaluate the efficacy and safety of baclofen for the treatment of GERD. Methods. We systematically searched randomized controlled trials published prior to November 2013 from PubMed, Medline, Embase, ScienceDirect, ClinicalTrials.gov, and the Cochrane Central Register of Randomized Controlled Trials. We performed a meta-analysis of all eligible trials. Results. Nine studies were identified with a total of 283 GERD patients and healthy subjects. Comparative analysis provided high quality data supporting the ability of baclofen to promote a short-term decrease in the number of reflux episodes per patient, the average length of reflux episodes, and the incidence of transient lower esophageal sphincter relaxation. No serious adverse events or death events were reported, and there were no significant differences in the overall adverse events between baclofen and placebo. All reported side effects of baclofen were of mild-to-moderate intensity, and the drug was well tolerated. Conclusion. Abundant evidence suggests that baclofen may be a useful approach for the treatment of GERD patients; however, a larger well-designed research study would further confirm this recommendation.
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17
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Ren LH, Chen WX, Qian LJ, Li S, Gu M, Shi RH. Addition of prokinetics to PPI therapy in gastroesophageal reflux disease: A meta-analysis. World J Gastroenterol 2014; 20:2412-2419. [PMID: 24605040 PMCID: PMC3942846 DOI: 10.3748/wjg.v20.i9.2412] [Citation(s) in RCA: 56] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/26/2013] [Revised: 11/19/2013] [Accepted: 01/02/2014] [Indexed: 02/06/2023] Open
Abstract
AIM: To investigate the efficacy of adding prokinetics to proton pump inhibitors (PPIs) for the treatment of gastroesophageal reflux disease (GERD).
METHODS: PubMed, Cochrane Library, and Web of Knowledge databases (prior to October 2013) were systematically searched for randomized controlled trials (RCTs) that compared therapeutic efficacy of PPI alone (single therapy) or PPI plus prokinetics (combined therapy) for GERD. The primary outcome of those selected trials was complete or partial relief of non-erosive reflux disease symptoms or mucosal healing in erosive reflux esophagitis. Using the test of heterogeneity, we established a fixed or random effects model where the risk ratio was the primary readout for measuring efficacy.
RESULTS: Twelve RCTs including 2403 patients in total were enrolled in this study. Combined therapy was not associated with significant relief of symptoms or alterations in endoscopic response relative to single therapy (95%CI: 1.0-1.2, P = 0.05; 95%CI: 0.66-2.61, P = 0.44). However, combined therapy was associated with a greater symptom score change (95%CI: 2.14-3.02, P < 0.00001). Although there was a reduction in the number of reflux episodes in GERD [95%CI: -5.96-(-1.78), P = 0.0003] with the combined therapy, there was no significant effect on acid exposure time (95%CI: -0.37-0.60, P = 0.65). The proportion of patients with adverse effects undergoing combined therapy was significantly higher than for PPI therapy alone (95%CI: 1.06-1.36, P = 0.005) when the difference between 5-HT receptor agonist and PPI combined therapy and single therapy (95%CI: 0.84-1.39, P = 0.53) was excluded.
CONCLUSION: Combined therapy may partially improve patient quality of life, but has no significant effect on symptom or endoscopic response of GERD.
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Ren LH, Chen WX, Qian LJ, Li S, Gu M, Shi RH. Addition of prokinetics to PPI therapy in gastroesophageal reflux disease: a meta-analysis. World J Gastroenterol 2014. [PMID: 24605040 DOI: org/10.3748/wjg.v20.i9.2412] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
AIM To investigate the efficacy of adding prokinetics to proton pump inhibitors (PPIs) for the treatment of gastroesophageal reflux disease (GERD). METHODS PubMed, Cochrane Library, and Web of Knowledge databases (prior to October 2013) were systematically searched for randomized controlled trials (RCTs) that compared therapeutic efficacy of PPI alone (single therapy) or PPI plus prokinetics (combined therapy) for GERD. The primary outcome of those selected trials was complete or partial relief of non-erosive reflux disease symptoms or mucosal healing in erosive reflux esophagitis. Using the test of heterogeneity, we established a fixed or random effects model where the risk ratio was the primary readout for measuring efficacy. RESULTS Twelve RCTs including 2403 patients in total were enrolled in this study. Combined therapy was not associated with significant relief of symptoms or alterations in endoscopic response relative to single therapy (95%CI: 1.0-1.2, P = 0.05; 95%CI: 0.66-2.61, P = 0.44). However, combined therapy was associated with a greater symptom score change (95%CI: 2.14-3.02, P < 0.00001). Although there was a reduction in the number of reflux episodes in GERD [95%CI: -5.96-(-1.78), P = 0.0003] with the combined therapy, there was no significant effect on acid exposure time (95%CI: -0.37-0.60, P = 0.65). The proportion of patients with adverse effects undergoing combined therapy was significantly higher than for PPI therapy alone (95%CI: 1.06-1.36, P = 0.005) when the difference between 5-HT receptor agonist and PPI combined therapy and single therapy (95%CI: 0.84-1.39, P = 0.53) was excluded. CONCLUSION Combined therapy may partially improve patient quality of life, but has no significant effect on symptom or endoscopic response of GERD.
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Affiliation(s)
- Li-Hua Ren
- Li-Hua Ren, Wei-Xu Chen, Shuo Li, Min Gu, Rui-Hua Shi, Department of Gastroenterology, the First Affiliated Hospital of Nanjing Medical University, Nanjing 210029, Jiangsu Province, China
| | - Wei-Xu Chen
- Li-Hua Ren, Wei-Xu Chen, Shuo Li, Min Gu, Rui-Hua Shi, Department of Gastroenterology, the First Affiliated Hospital of Nanjing Medical University, Nanjing 210029, Jiangsu Province, China
| | - Li-Juan Qian
- Li-Hua Ren, Wei-Xu Chen, Shuo Li, Min Gu, Rui-Hua Shi, Department of Gastroenterology, the First Affiliated Hospital of Nanjing Medical University, Nanjing 210029, Jiangsu Province, China
| | - Shuo Li
- Li-Hua Ren, Wei-Xu Chen, Shuo Li, Min Gu, Rui-Hua Shi, Department of Gastroenterology, the First Affiliated Hospital of Nanjing Medical University, Nanjing 210029, Jiangsu Province, China
| | - Min Gu
- Li-Hua Ren, Wei-Xu Chen, Shuo Li, Min Gu, Rui-Hua Shi, Department of Gastroenterology, the First Affiliated Hospital of Nanjing Medical University, Nanjing 210029, Jiangsu Province, China
| | - Rui-Hua Shi
- Li-Hua Ren, Wei-Xu Chen, Shuo Li, Min Gu, Rui-Hua Shi, Department of Gastroenterology, the First Affiliated Hospital of Nanjing Medical University, Nanjing 210029, Jiangsu Province, China
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19
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Xu XH, Yang ZM, Chen Q, Yu L, Liang SW, Lv HJ, Qiu ZM. Therapeutic efficacy of baclofen in refractory gastroesophageal reflux-induced chronic cough. World J Gastroenterol 2013; 19:4386-4392. [PMID: 23885151 PMCID: PMC3718908 DOI: 10.3748/wjg.v19.i27.4386] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/05/2013] [Revised: 05/03/2013] [Accepted: 06/06/2013] [Indexed: 02/06/2023] Open
Abstract
AIM: To evaluate the efficacy and safety of baclofen for treatment of refractory gastroesophageal reflux-induced chronic cough (GERC) unresponsive to standard anti-reflux therapy.
METHODS: Sixteen patients with refractory GERC were given an 8-wk course of baclofen 20 mg three times a day as an add-on therapy to omeprazole. Changes in the cough symptom score, cough threshold to capsaicin, reflux symptom score and possible adverse effects were determined after treatment. The variables of multi-channel intraluminal impedance combined with pH monitoring were compared between responders and non-responders to baclofen.
RESULTS: Twelve of 16 patients completed treatment. Cough disappeared or improved in 56.3% (9/16) of patients, including 6 patients with acid reflux-induced cough (66.7%) and 3 patients with non-acid reflux-induced cough (33.3%). With baclofen treatment, the cough symptom score began to decrease at week 2, was clearly decreased at week 6 and reached a minimum at week 8. At the end of therapy, the lowest concentration of capsaicin required for induction of ≥ 2 and ≥ 5 coughs increased from 0.98 (1.46) to 1.95 (6.82) μmol/L (Z = -2.281, P = 0.024) and from 1.95 (7.31) to 7.8 (13.65) μmol/L (Z = -2.433, P = 0.014), respectively, and the reflux symptom score decreased from 8.0 ± 1.6 to 6.8 ± 0.8 (t = 2.454, P = 0.023). The number of acid reflux episodes was significantly lower in responders than in non-responders. The main adverse effects were somnolence, dizziness and fatigue.
CONCLUSION: Baclofen is a useful, but suboptimal treatment option for refractory GERC.
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20
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Vakil NB, Huff FJ, Cundy KC. Randomised clinical trial: arbaclofen placarbil in gastro-oesophageal reflux disease--insights into study design for transient lower sphincter relaxation inhibitors. Aliment Pharmacol Ther 2013; 38:107-17. [PMID: 23721547 DOI: 10.1111/apt.12363] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/27/2013] [Revised: 04/11/2013] [Accepted: 05/14/2013] [Indexed: 12/16/2022]
Abstract
BACKGROUND Arbaclofen placarbil is a pro-drug of the gamma-aminobutyric acid-B agonist R-baclofen that has been shown to reduce reflux episodes in patients with gastro-oesophageal reflux disease (GERD). AIM To evaluate the efficacy and safety of arbaclofen placarbil vs. placebo as adjunctive therapy in subjects with troublesome GERD symptoms despite therapy with once-daily doses of a proton pump inhibitor (PPI) and to identify the characteristics of patients who were responders. METHODS Patients (n = 460) with symptomatic GERD experiencing troublesome symptoms on once-daily PPI therapy were enrolled in this phase II, randomised, multicentre, double-blind, placebo-controlled, dose-ranging study. Patients were randomised to receive placebo or arbaclofen placarbil (20 or 40 mg once daily, 20 or 30 mg twice daily) with their current PPI for 6 weeks. Patients recorded heartburn and other GERD symptoms in a daily diary and rated severity of each event. The primary endpoint was percent change from baseline in heartburn events per week. RESULTS In the primary analysis, there was no significant difference between arbaclofen placarbil and placebo. Post hoc analyses removing mild and very mild heartburn events resulted in greater percent reductions for all arbaclofen placarbil doses with nominal P values <0.05 for each dose compared with placebo. There was a dose-related increase for the most common adverse events. CONCLUSIONS Arbaclofen placarbil was not superior to placebo in the primary analysis. Post hoc analyses suggest that subjects with more clinically relevant moderate or severe symptoms are more likely to respond to arbaclofen placarbil (clinicaltrials.gov NCT00978016).
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Affiliation(s)
- N B Vakil
- University of Wisconsin School of Medicine and Public Health, Milwaukee, WI, USA.
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21
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Xu X, Chen Q, Liang S, Lü H, Qiu Z. Successful resolution of refractory chronic cough induced by gastroesophageal reflux with treatment of baclofen. COUGH 2012; 8:8. [PMID: 23078809 PMCID: PMC3500706 DOI: 10.1186/1745-9974-8-8] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/07/2012] [Accepted: 10/01/2012] [Indexed: 12/18/2022]
Abstract
Gastroesophageal reflux induced cough is a common cause of chronic cough, and proton pump inhibitors are a standard therapy. However, the patients unresponsive to the standard therapy are difficult to treat and remain a challenge to doctors. Here, we summarized the experience of successful resolution of refractory chronic cough due to gastroesophageal reflux with baclofen in three patients. It is concluded that baclofen may be a viable option for gastroesophageal reflux induced cough unresponsive to proton pump inhibitor therapy.
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Affiliation(s)
- Xianghuai Xu
- Department of Respiratory Medicine, Tongji Hospital, Tongji University School of Medicine, No, 389 Xincun Road, Shanghai, 200065, China.
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22
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Cossentino MJ, Mann K, Armbruster SP, Lake JM, Maydonovitch C, Wong RKH. Randomised clinical trial: the effect of baclofen in patients with gastro-oesophageal reflux--a randomised prospective study. Aliment Pharmacol Ther 2012; 35:1036-44. [PMID: 22428773 DOI: 10.1111/j.1365-2036.2012.05068.x] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/21/2011] [Revised: 12/12/2011] [Accepted: 02/28/2012] [Indexed: 12/22/2022]
Abstract
BACKGROUND Baclofen, a GABA(B) agonist, has been shown to reduce transient lower oesophageal sphincter relaxations (TLESRs), a major cause of gastro-oesophageal reflux disease (GERD). AIM To examine the effect and tolerability of baclofen in GERD patients over a 2-week period. METHODS Forty-three GERD patients with abnormal 24-h pH tests were prospectively randomised to receive baclofen or placebo in a double-blind fashion for 2 weeks. Oesophageal manometry, 24-h pH monitoring, and a standard questionnaire was administered, before and after treatment. RESULTS Thirty-four patients completed the study. In the baclofen group there were significant decreases in 24-h pH score (P = 0.020), percent of upright reflux episodes (P = 0.016), percent total time pH <4 (P = 0.003), number of reflux episodes (P = 0.018), number of reflux episodes longer than 5 min (P = 0.016), number of postprandial reflux episodes (P = 0.045), and percentage of time pH <4 (P = 0.003). No significant changes in reflux parameters were noted in the placebo group. Patients receiving baclofen had significantly less belching (P = 0.038), regurgitation (P = 0.036) and overall symptom score (P = 0.004) whereas placebo patients had less heartburn (P = 0.001), chest pain (P = 0.002), regurgitation (P = 0.017) and overall symptom score (P = 0.000). However, there were no significant differences in changes of reflux parameters or symptoms when comparing the two groups. Drowsiness did not limit baclofen use. CONCLUSIONS Baclofen was associated with a significant decrease in percent upright reflux by 24-h pH monitoring and a significant improvement in belching, regurgitation and overall symptom score. Baclofen may be more effective in patients with predominantly upright reflux and belching.
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Affiliation(s)
- M J Cossentino
- Walter Reed National Military Medical Center, Department of Gastroenterology, Bethesda, MD, USA
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23
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New pharmacologic approaches in gastroesophageal reflux disease. Thorac Surg Clin 2011; 21:557-74. [PMID: 22040637 DOI: 10.1016/j.thorsurg.2011.09.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
This article highlights current and emerging pharmacological treatments for gastroesophageal reflux disease (GERD), opportunities for improving medical treatment, the extent to which improvements may be achieved with current therapy, and where new therapies may be required. These issues are discussed in the context of current thinking on the pathogenesis of GERD and its various manifestations and on the pharmacologic basis of current treatments.
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24
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Kessing BF, Conchillo JM, Bredenoord AJ, Smout AJPM, Masclee AAM. Review article: the clinical relevance of transient lower oesophageal sphincter relaxations in gastro-oesophageal reflux disease. Aliment Pharmacol Ther 2011; 33:650-61. [PMID: 21219371 DOI: 10.1111/j.1365-2036.2010.04565.x] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
BACKGROUND Transient lower oesophageal sphincter relaxations (TLOSR) are considered the physiological mechanism that enables venting of gas from the stomach and appear as sphincter relaxations that are not induced by swallowing. It has become increasingly clear that most reflux episodes occur during TLOSRs and therefore play a key role in gastro-oesophageal reflux disease (GERD). AIM To describe the current knowledge about TLOSRs and its clinical implications. METHODS Search of the literature published in English using the PubMed database and relevant abstracts presented at international conventions. RESULTS Several factors influence the rate of TLOSRs including anti-reflux surgery, meal, body position, nutrition, lifestyle and a wide array of neurotransmitters. Ongoing insights in the neurotransmitters responsible for the modulation of TLOSRs, as well as the neural pathways involved in TLOSR induction, have lead to novel therapeutic targets. These therapeutic targets can serve as an add-on therapy in patients with an unsatisfactory response to proton pump inhibitor by inhibiting TLOSRs and its associated reflux events. However, the TLOSR-inhibiting drugs that are currently available still have significant side effects. CONCLUSION It is likely that in the future, selected GERD patients may benefit from transient lower oesophageal sphincter relaxation inhibition when compounds are found without significant side effects.
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Affiliation(s)
- B F Kessing
- Department of Gastroenterology and Hepatology, Academic Medical Center Amsterdam, Meibergdreef 9, Amsterdam, The Netherlands.
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25
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Kuo P, Holloway RH. Beyond acid suppression: new pharmacologic approaches for treatment of GERD. Curr Gastroenterol Rep 2010; 12:175-80. [PMID: 20425477 DOI: 10.1007/s11894-010-0102-7] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
Proton pump inhibitors are highly successful in treating gastroesophageal reflux disease, but a significant proportion of patients have persistent symptoms from weakly or nonacidic reflux. Transient lower esophageal sphincter relaxation (TLESR) represents the dominant mechanism of gastroesophageal reflux and has therefore become the most intensely investigated therapeutic target. The triggering of TLESR involve the vagal pathways and the gamma-aminobutyric type B (GABA(B)) and metabotropic glutamate type 5 (mGluR5) receptors. Baclofen is a GABA(B) receptor agonist that is effective in inhibiting TLESR and reducing the number of reflux episodes, but is associated with significant central nervous system (CNS) side effects. The newer GABA(B) agonists, such as AZD9343 and AZD3355, and mGluR5 antagonists, such as 2-methyl-6-(phenylethynyl)-pyridine (MPEP), have been shown in small, randomized, controlled trials to have comparable efficacy to baclofen, but possibly a more favorable CNS side effect profile. Cannibinoid agonists, such as Delta(9)-THC, have also been demonstrated to reduce TLESRs and reflux events respectively. Macrolide antibiotics (eg, erythromycin) show early promise in a select group of patients with possible reflux associated post-lung transplant problems.
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Affiliation(s)
- Paul Kuo
- Department of Gastroenterology and Hepatology, Royal Adelaide Hospital, North Terrace, Adelaide, SA, 5000, Australia
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26
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Abstract
This article highlights current and emerging pharmacological treatments for gastroesophageal reflux disease (GERD), opportunities for improving medical treatment, the extent to which improvements may be achieved with current therapy, and where new therapies may be required. These issues are discussed in the context of current thinking on the pathogenesis of GERD and its various manifestations and on the pharmacologic basis of current treatments.
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Abstract
Refractory gastro-esophageal reflux disease (GERD), defined as persistent symptoms despite proton pump inhibitor (PPI) therapy, is an increasingly prevalent condition and is becoming a major challenge for the clinician. Since non-acidic reflux may be associated with symptoms persisting during PPI treatment, the lower esophageal sphincter (LES), the most important barrier protecting against reflux, has become an important target for the treatment of (refractory) GERD. Preclinical research has identified several receptors that are involved in the control of transient lower esophageal sphincter relaxations (TLESRs), the predominant mechanism of both acid and non-acidic reflux events, and several drugs have now been tested in humans. The GABA(B) agonist baclofen has demonstrated to effectively reduce the rate of TLESRs and the amount of reflux in both GERD patients and healthy volunteers. Nevertheless, the occurrence of central side effects limits its clinical use for the treatment of GERD. Several analogues are being developed to overcome this limitation and have shown promising results. Additionally, metabotropic glutamate receptor 5 (mGluR5) receptor antagonists have shown to reduce both acid and non-acidic reflux in GERD patients and several molecules are currently being evaluated. Although CB(1) antagonists have been shown to reduce TLESRs, they are also associated with central side effects, limiting their clinical applicability. Despite the identification of several potentially interesting drugs, the main challenge for the future remains the reduction of central side effects. Moreover, future studies will need to demonstrate the efficacy of these treatments in patients with refractory GERD.
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Affiliation(s)
- K Blondeau
- Center for gastroenterological research, KULeuven, Belgium.
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28
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Boeckxstaens GE, Smout A. Systematic review: role of acid, weakly acidic and weakly alkaline reflux in gastro-oesophageal reflux disease. Aliment Pharmacol Ther 2010; 32:334-43. [PMID: 20491749 DOI: 10.1111/j.1365-2036.2010.04358.x] [Citation(s) in RCA: 90] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
BACKGROUND The importance of weakly acidic and weakly alkaline reflux in gastro-oesophageal reflux disease (GERD) is gaining recognition. AIM To quantify the proportions of reflux episodes that are acidic (pH <4), weakly acidic (pH 4-7) and weakly alkaline (pH >7) in adult patients with GERD, and to evaluate their correlation with symptoms. METHODS Studies were identified by systematic PubMed and Embase searches. Data are presented as sample-size weighted means and 95% confidence intervals. RESULTS In patients with GERD taking a proton pump inhibitor (PPI), 80% (76-84%) of reflux episodes were weakly acidic or weakly alkaline and 83% (78-88%) of reflux symptom episodes were associated with weakly acidic or weakly alkaline reflux episodes. In patients with GERD not taking a PPI, 63% (59-67%) of reflux episodes were acidic and 72% (57-87%) of reflux symptom episodes were associated with acid reflux episodes. Six studies presented data separately for weakly alkaline reflux, which accounted for <5% of all reflux episodes, both on and off PPI therapy. CONCLUSIONS Weakly acidic reflux underlies the majority of reflux episodes in patients with GERD on PPI therapy, and is the main cause of reflux symptoms occurring despite PPI therapy.
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Affiliation(s)
- G E Boeckxstaens
- Department of Gastroenterology and Hepatology, Academic Medical Centre, Amsterdam, The Netherlands.
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29
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Affiliation(s)
- John Dent
- Department of Gastroenterology and Hepatology, Royal Adelaide Hospital and University of Adelaide, North Terrace, Adelaide, South Australia, Australia.
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Brändén L, Fredriksson A, Harring E, Jensen J, Lehmann A. The novel, peripherally restricted GABAB receptor agonist lesogaberan (AZD3355) inhibits acid reflux and reduces esophageal acid exposure as measured with 24-h pHmetry in dogs. Eur J Pharmacol 2010; 634:138-41. [PMID: 20176012 DOI: 10.1016/j.ejphar.2010.02.015] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2009] [Revised: 02/03/2010] [Accepted: 02/12/2010] [Indexed: 01/01/2023]
Abstract
While patients with symptoms of gastroesophageal reflux disease generally respond well to proton pump inhibitors, 20-30% continue to experience troublesome symptoms. In such cases, agents that target transient lower esophageal sphincter (LES) relaxation may be useful as add-on therapy to proton pump inhibitors. The GABAB receptor agonist baclofen inhibits transient LES relaxation but it is not an ideal agent due to central nervous system activity. Lesogaberan (AZD3355) is a peripherally restricted GABAB receptor agonist with limited central nervous system activity that inhibits transient LES relaxation in dogs. In the present study, the comparative effects of lesogaberan (7 micromol/kg) and baclofen (2.8 micromol/kg) on reflux were studied in dogs using 24-h pHmetry. Drugs (or vehicle control) were administered orally prior to the first meal of the day, and the number of reflux episodes (pH<4 for > or = 5 s) and acid exposure time were computed for the 24-h monitoring period. The mean (S.E.M.) number of reflux episodes/24 h was 4.6 (0.4) and 6.4 (0.6) for lesogaberan and baclofen, respectively, versus 10.7 (0.5) for control (P<0.0001 for both). Acid exposure time was 51.2 (4.5) min for control versus 23.6 (3.8) min for lesogaberan (P<0.0001) and 35.4 (6.5) min with baclofen (P=0.05). It is concluded that lesogaberan significantly reduces acid reflux in dogs, with comparable efficacy to baclofen.
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GABAB receptor agonism as a novel therapeutic modality in the treatment of gastroesophageal reflux disease. ADVANCES IN PHARMACOLOGY (SAN DIEGO, CALIF.) 2010; 58:287-313. [PMID: 20655487 DOI: 10.1016/s1054-3589(10)58012-8] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
Defined pharmacologically by its insensitivity to the GABA(A) antagonist bicuculline and sensitivity to the GABA analogue baclofen, the G protein-linked gamma-aminobutyric acid type B (GABA(B)) receptor couples to adenylyl cyclase, voltage-gated calcium channels, and inwardly-rectifying potassium channels. On the basis of a wealth of preclinical data in conjunction with early clinical observations that baclofen improves symptoms of gastroesophageal reflux disease (GERD), the GABA(B) receptor has been proposed as a therapeutic target for a number of diseases including GERD. Subsequently, there has been a significant effort to develop a peripherally-restricted GABA(B) agonist that is devoid of the central nervous system side effects that are observed with baclofen. In this article we review the in vitro and in vivo pharmacology of the peripherally-restricted GABA(B) receptor agonists and the preclinical and clinical development of lesogaberan (AZD3355, (R)-(3-amino-2-fluoropropyl) phosphinic acid), a potent and predominately peripherally-restricted GABA(B) receptor agonist with a preclinical therapeutic window superior to baclofen.
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Beaumont H, Smout A, Aanen M, Rydholm H, Lei A, Lehmann A, Ruth M, Boeckxstaens G. The GABA(B) receptor agonist AZD9343 inhibits transient lower oesophageal sphincter relaxations and acid reflux in healthy volunteers: a phase I study. Aliment Pharmacol Ther 2009; 30:937-46. [PMID: 19650825 DOI: 10.1111/j.1365-2036.2009.04107.x] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
BACKGROUND Transient lower oesophageal sphincter relaxations (TLESRs) represent an interesting target for the treatment of gastro-oesophageal reflux. Baclofen reduces TLESRs and reflux episodes, but is not optimal for clinical application because of its central side effects. Therefore, new agents are required. AIM To study the effect of AZD9343, a new selective GABA(B) receptor agonist, in healthy volunteers. METHODS A total of 27 subjects participated in a placebo-controlled, randomized, two-centre phase I study. Subjects underwent oesophageal manometry and pH-metry for 3 h postprandially. Before meal ingestion, a single oral dose of placebo, 60 and 320 mg AZD9343 or 40 mg baclofen was given on four separate days. RESULTS Somnolence was reported after 320 mg AZD9343 and baclofen. Reversible short-lasting paraesthesia was reported after AZD9343. AZD9343 320 mg and baclofen significantly reduced the number of TLESRs with 32% and 40% respectively. Acid reflux was significantly decreased by AZD9343 and baclofen. Like baclofen, AZD9343 increased LES pressure before meal intake. AZD9343 320 mg and baclofen significantly reduced the swallowing rate. CONCLUSIONS Like baclofen, AZD9343 dose-dependently decreases the number of TLESRs and acid reflux episodes, increases LES pressure and reduces swallowing, extending the concept that GABA(B) agonists are potent reflux inhibitors. However, discovery of analogues with an improved side effect profile is warranted.
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Affiliation(s)
- H Beaumont
- Academic Medical Centre, Amsterdam, The Netherlands
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