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Pagaduan JC, Chen YS, Fell JW, Xuan Wu SS. A preliminary systematic review and meta-analysis on the effects of heart rate variability biofeedback on heart rate variability and respiration of athletes. JOURNAL OF COMPLEMENTARY & INTEGRATIVE MEDICINE 2022; 19:817-826. [PMID: 34187114 DOI: 10.1515/jcim-2020-0528] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/06/2021] [Accepted: 06/18/2021] [Indexed: 06/13/2023]
Abstract
To date, there is no quantitative review examining the influence of heart rate variability biofeedback (HRV BFB) on the athlete population. Such an undertaking may provide valuable information on the autonomic and respiration responses of athletes when performing HRV BFB. Thus, purpose of this preliminary systematic review and meta-analysis on the effects of HRV BFB on HRV and respiration of athletes. Searches of Springerlink, SportDiscus, Web of Science, PROQUEST Academic Research Library, Google Scholar, and ScienceDirect were conducted for studies that met the following criteria: (1) experimental studies involving athletes that underwent randomized control trial; (2) availability of HRV BFB as a treatment compared with a control (CON)/placebo (PLA); (3) any pre and post HRV variable and/or breathing frequency as dependent variable/s; and, (4) peer-reviewed articles written in English. Four out of 660 studies involving 115 athletes (25 females and 90 males) ages 16-30 years old were assessed in this review. Preliminary findings suggest the promising ability of HRV BFB to improve respiratory mechanics in athlete population. More work is needed to determine the autonomic modulatory effect of HRV BFB in athletes.
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Affiliation(s)
- Jeffrey Cayaban Pagaduan
- School of Health Sciences, College of Health and Medicine, University of Tasmania, Newnham, Tasmania, Australia
| | - Yung-Sheng Chen
- Department of Exercise and Health Sciences, University of Taipei, Taipei, Taiwan, ROC
| | - James William Fell
- School of Health Sciences, College of Health and Medicine, University of Tasmania, Newnham, Tasmania, Australia
| | - Sam Shi Xuan Wu
- School of Health Sciences, Faculty of Health, Arts, and Design, Swinburne University, Melbourne, VIC, Australia
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2
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Han X, Zhang Y, Lee A, Li Z, Gao J, Wu X, Zhao J, Wang H, Chen D, Zou D, Owyang C. Upregulation of acid sensing ion channels is associated with esophageal hypersensitivity in GERD. FASEB J 2021; 36:e22083. [PMID: 34918385 PMCID: PMC8715981 DOI: 10.1096/fj.202100606r] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2021] [Revised: 11/03/2021] [Accepted: 11/22/2021] [Indexed: 12/13/2022]
Abstract
Proton pump inhibitors (PPIs) are the mainstay of therapy for gastroesophageal reflux disease (GERD) but up to 60% of patients have inadequate response to therapy. Acid sensing ion channels (ASICs) play important roles in nociception. This study aimed to investigate whether the increased expression of ASICs results in neuronal hyperexcitability in GERD. Esophageal biopsies were taken from GERD patients and healthy subjects to compare expression of ASIC1 and 3. Next, gene and protein expression of ASIC1 and 3 from esophageal mucosa and dorsal root ganglia (DRG) neurons were measured by qPCR, Western‐blot and immunofluorescence in rodent models of reflux esophagitis (RE), non‐erosive reflux disease (NERD), and sham operated groups. Excitability of DRG neurons in the GERD and sham groups were also tested by whole‐cell patch‐clamp recordings. We demonstrated that ASIC1 and 3 expression were significantly increased in patients with RE compared with healthy controls. This correlated positively with symptom severity of heartburn and regurgitation (p < .001). Next, ASIC1 and 3 gene and protein expression in rodent models of RE and NERD were similarly increased in esophageal mucosa as well as T3–T5 DRG neurons compared with sham operation. DRG neurons from RE animals showed hyperexcitability compared with sham group. However, intrathecal injection of ASIC specific inhibitors, PcTx1 and APTEx‐2, as well as silencing ASIC1 and 3 genes with specific siRNAs prevented visceral hypersensitivity. Overall, upregulation of ASIC1 and 3 may lead to visceral hypersensitivity in RE and NERD and may be a potential therapeutic target for PPI non‐responsive patients.
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Affiliation(s)
- Xu Han
- Department of Gastroenterology, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Yawen Zhang
- Division of Gastroenterology and Hepatology, Department of Internal Medicine, University of Michigan, Ann Arbor, Michigan, USA
| | - Allen Lee
- Division of Gastroenterology and Hepatology, Department of Internal Medicine, University of Michigan, Ann Arbor, Michigan, USA
| | - Zhaoshen Li
- Division of Gastroenterology, Changhai Hospital, Second Military Medical University, Shanghai, China
| | - Jun Gao
- Division of Gastroenterology, Changhai Hospital, Second Military Medical University, Shanghai, China
| | - Xiaoyin Wu
- Division of Gastroenterology and Hepatology, Department of Internal Medicine, University of Michigan, Ann Arbor, Michigan, USA
| | - Jiulong Zhao
- Division of Gastroenterology, Changhai Hospital, Second Military Medical University, Shanghai, China
| | - Hui Wang
- Division of Gastroenterology, Changhai Hospital, Second Military Medical University, Shanghai, China
| | - Di Chen
- Division of Gastroenterology, Changhai Hospital, Second Military Medical University, Shanghai, China
| | - Duowu Zou
- Department of Gastroenterology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Chung Owyang
- Division of Gastroenterology and Hepatology, Department of Internal Medicine, University of Michigan, Ann Arbor, Michigan, USA
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Patel D, Fass R, Vaezi M. Untangling Nonerosive Reflux Disease From Functional Heartburn. Clin Gastroenterol Hepatol 2021; 19:1314-1326. [PMID: 32246998 DOI: 10.1016/j.cgh.2020.03.057] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/13/2019] [Revised: 03/23/2020] [Accepted: 03/23/2020] [Indexed: 02/07/2023]
Abstract
Heartburn is a common symptom in clinical practice, but as many as 70% of patients have normal findings from upper endoscopy. Most of these patients have nonerosive reflux disease (NERD) or functional esophageal disorders. NERD is the most common phenotype of gastroesophageal reflux disease, and functional heartburn is the most common cause for refractory heartburn. In patients with NERD, symptoms arise from gastroesophageal reflux and esophageal hypersensitivity, whereas in patients with functional heartburn, symptoms result from esophageal hypersensitivity. A diagnosis of NERD requires endoscopy and reflux testing, whereas a diagnosis of functional heartburn also requires esophageal manometry. NERD is treated most commonly with medical, endoscopic, and surgical antireflux approaches, whereas functional heartburn as well as NERD can be treated with neuromodulators, psychological intervention, and complementary medicine options.
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Affiliation(s)
- Dhyanesh Patel
- Division of Gastroenterology, Hepatology, and Nutrition, Vanderbilt University Medical Center, Nashville, Tennessee.
| | - Ronnie Fass
- Division of Gastroenterology and Hepatology, MetroHealth System, Case Western Reserve University, Cleveland, Ohio
| | - Michael Vaezi
- Division of Gastroenterology, Hepatology, and Nutrition, Vanderbilt University Medical Center, Nashville, Tennessee
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4
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Savarino V, Marabotto E, Zentilin P, Furnari M, Bodini G, De Maria C, Tolone S, De Bortoli N, Frazzoni M, Savarino E. Pathophysiology, diagnosis, and pharmacological treatment of gastro-esophageal reflux disease. Expert Rev Clin Pharmacol 2020; 13:437-449. [PMID: 32253948 DOI: 10.1080/17512433.2020.1752664] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
INTRODUCTION Gastro-esophageal reflux disease (GERD) is a highly prevalent, chronic, relapsing disorder, whose knowledge has increased in last years thanks to the advent of new sophisticated techniques, such as 24-h impedance-pH monitoring and high-resolution manometry, for the study of esophageal functions. AREAS COVERED This review provides an overview of our advancements in understanding the complex pathophysiology, improving the diagnosis and defining the modern pharmacological therapeutic approach to GERD. EXPERT OPINION The growing clinical application of impedance-pH testing has allowed us to know the diversity of patients with non-erosive reflux disease (NERD), who nowadays represent about 70% of the whole population with reflux symptoms. We have realized that NERD has to be considered as an umbrella term covering various subgroups with different pathophysiologies. The development of new impedance metrics, in particular mean nocturnal baseline impedance, seems to be promising in the improvement of the diagnostic process of this disease. There are no particularly innovative features in the pharmacological therapy of GERD, unless the interest toward drugs is able to increase the defense properties of esophageal mucosa and/or its protection. These compounds can be of help in combination with proton pump inhibitors in NERD patients with partial response to antisecretory drugs alone.
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Affiliation(s)
| | - Elisa Marabotto
- Department of Internal Medicine, University of Genoa , Genoa, Italy
| | | | - Manuele Furnari
- Department of Internal Medicine, University of Genoa , Genoa, Italy
| | - Giorgia Bodini
- Department of Internal Medicine, University of Genoa , Genoa, Italy
| | | | - Salvatore Tolone
- Department of Surgery, University of Campania "Luigi Vanvitelli" , Naples, Italy
| | - Nicola De Bortoli
- Department of Translational Research and New Technologies in Medicine and Surgery, University of Pisa , Pisa, Italy
| | - Marzio Frazzoni
- Department of Gastroenterology, Gastroenterology Digestive Pathophysiology Unit, Baggiovara Hospital , Modena, Italy
| | - Edoardo Savarino
- Department of Surgery, Oncology and Gastroenterology, University of Padua , Padua, Italy
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5
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Sobrino-Cossío S, Teramoto-Matsubara O, Mateos-Pérez G, Abdo-Francis JM, Tawil J, Olguín-Ramírez C, Orozco-Gamiz A, Galvis-García ES. In search of the grail: A race for acid suppression. REVISTA DE GASTROENTEROLOGIA DE MEXICO (ENGLISH) 2019; 84:344-356. [PMID: 31239096 DOI: 10.1016/j.rgmx.2019.04.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/26/2019] [Revised: 03/26/2019] [Accepted: 04/30/2019] [Indexed: 06/09/2023]
Abstract
Proton pump inhibitors are the reference standards for the treatment of acid-related diseases. Acid suppression in gastroesophageal reflux disease is associated with a high rate of mucosal cicatrization, but symptom response differs among endoscopic phenotypes. Extraesophageal manifestations have a good clinical response in patients that present with abnormal acid exposure (diagnostic test) in the esophagus. Proton pump inhibitors have shown their effectiveness for reducing symptom intensity in nighttime reflux and sleep disorders, improving quality of life and work productivity. That can sometimes be achieved through dose modifications by splitting or increasing the dose, or through galenic formulation. Proton pump inhibitors are not exempt from controversial aspects related to associated adverse events. Technological development is directed at improving proton pump inhibitor performance through increasing the half-life, maximum concentration, and area under the curve of the plasma concentrations through galenic formulation, as well as creating safer and more tolerable drugs. The present review is focused on the mechanisms of action, pharmacokinetic properties, and technological advances for increasing the pharmacologic performance of a proton pump inhibitor.
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Affiliation(s)
- S Sobrino-Cossío
- Hospital Ángeles del Pedregal, Ciudad de México, México; Gástrica, Centro Avanzado en Endoscopia y Estudios Funcionales, Ciudad de México, México.
| | - O Teramoto-Matsubara
- Gástrica, Centro Avanzado en Endoscopia y Estudios Funcionales, Ciudad de México, México; Centro Médico ABC, Ciudad de México, México
| | - G Mateos-Pérez
- Hospital Ángeles del Pedregal, Ciudad de México, México; Hospital Ángeles Acoxpa, Ciudad de México, México
| | - J M Abdo-Francis
- Gástrica, Centro Avanzado en Endoscopia y Estudios Funcionales, Ciudad de México, México; Hospital Ángeles Acoxpa, Ciudad de México, México
| | - J Tawil
- Departamento de Trastornos Funcionales Digestivos, Gedyt-Gastroenterología Diagnóstica y Terapéutica, Buenos Aires, Argentina
| | - C Olguín-Ramírez
- Gástrica, Centro Avanzado en Endoscopia y Estudios Funcionales, Ciudad de México, México
| | - A Orozco-Gamiz
- Gastrolab Laboratorio de Fisiología Gastrointestinal, Guadalajara, Jalisco, México
| | - E S Galvis-García
- Gástrica, Centro Avanzado en Endoscopia y Estudios Funcionales, Ciudad de México, México; Hospital General de México «Dr. Eduardo Liceaga», Ciudad de México, México
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6
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Sobrino-Cossío S, Teramoto-Matsubara O, Mateos-Pérez G, Abdo-Francis J, Tawil J, Olguín-Ramírez C, Orozco-Gamiz A, Galvis-García E. In search of the grail: A race for acid suppression. REVISTA DE GASTROENTEROLOGÍA DE MÉXICO (ENGLISH EDITION) 2019. [DOI: 10.1016/j.rgmxen.2019.04.001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
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7
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Tack J, Pandolfino JE. Pathophysiology of Gastroesophageal Reflux Disease. Gastroenterology 2018; 154:277-288. [PMID: 29037470 DOI: 10.1053/j.gastro.2017.09.047] [Citation(s) in RCA: 160] [Impact Index Per Article: 26.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/17/2017] [Revised: 09/07/2017] [Accepted: 09/08/2017] [Indexed: 12/13/2022]
Abstract
The pathogenesis of gastroesophageal reflux disease (GERD) is complex and involves changes in reflux exposure, epithelial resistance, and visceral sensitivity. The gastric refluxate is a noxious material that injures the esophagus and elicits symptoms. Esophageal exposure to gastric refluxate is the primary determinant of disease severity. This exposure arises via compromise of the anti-reflux barrier and reduced ability of the esophagus to clear and buffer the refluxate, leading to reflux disease. However, complications and symptoms also occur in the context of normal reflux burden, when there is either poor epithelial resistance or increased visceral sensitivity. Reflux therefore develops via alterations in the balance of aggressive and defensive forces.
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Affiliation(s)
- Jan Tack
- Translational Research Center for Gastrointestinal Disorders, University of Leuven, Belgium.
| | - John E Pandolfino
- Division of Gastroenterology and Hepatology, Northwestern University Feinberg School of Medicine, Chicago, Illinois
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8
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Gyawali CP, Roman S, Bredenoord AJ, Fox M, Keller J, Pandolfino JE, Sifrim D, Tatum R, Yadlapati R, Savarino E. Classification of esophageal motor findings in gastro-esophageal reflux disease: Conclusions from an international consensus group. Neurogastroenterol Motil 2017; 29. [PMID: 28544357 DOI: 10.1111/nmo.13104] [Citation(s) in RCA: 128] [Impact Index Per Article: 18.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/22/2016] [Accepted: 04/10/2017] [Indexed: 02/06/2023]
Abstract
BACKGROUND High-resolution manometry (HRM) has resulted in new revelations regarding the pathophysiology of gastro-esophageal reflux disease (GERD). The impact of new HRM motor paradigms on reflux burden needs further definition, leading to a modern approach to motor testing in GERD. METHODS Focused literature searches were conducted, evaluating pathophysiology of GERD with emphasis on HRM. The results were discussed with an international group of experts to develop a consensus on the role of HRM in GERD. A proposed classification system for esophageal motor abnormalities associated with GERD was generated. KEY RESULTS Physiologic gastro-esophageal reflux is inherent in all humans, resulting from transient lower esophageal sphincter (LES) relaxations that allow venting of gastric air in the form of a belch. In pathological gastro-esophageal reflux, transient LES relaxations are accompanied by reflux of gastric contents. Structural disruption of the esophagogastric junction (EGJ) barrier, and incomplete clearance of the refluxate can contribute to abnormally high esophageal reflux burden that defines GERD. Esophageal HRM localizes the LES for pH and pH-impedance probe placement, and assesses esophageal body peristaltic performance prior to invasive antireflux therapies and antireflux surgery. Furthermore, HRM can assess EGJ and esophageal body mechanisms contributing to reflux, and exclude conditions that mimic GERD. CONCLUSIONS & INFERENCES Structural and motor EGJ and esophageal processes contribute to the pathophysiology of GERD. A classification scheme is proposed incorporating EGJ and esophageal motor findings, and contraction reserve on provocative tests during HRM.
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Affiliation(s)
- C P Gyawali
- Division of Gastroenterology, Washington University School of Medicine, St. Louis, MO, USA
| | - S Roman
- Digestive Physiology, Hospices Civils de Lyon and Lyon I University and Inserm U1032, LabTAU, Lyon, France
| | - A J Bredenoord
- Gastroenterology and Hepatology, Academic Medical Center, Amsterdam, The Netherlands
| | - M Fox
- Department of Gastroenterology, Abdominal Center, St. Claraspital, Basel, Switzerland
| | - J Keller
- Department of Internal Medicine, Israelitic Hospital, University of Hamburg, Hamburg, Germany
| | - J E Pandolfino
- Division of Gastroenterology, Department of Medicine, Northwestern University, Chicago, IL, USA
| | - D Sifrim
- Center for Digestive Diseases, Bart's and the London School and Dentistry, London, UK
| | - R Tatum
- Department of Surgery, University of Washington, Seattle, WA, USA
| | - R Yadlapati
- Division of Gastroenterology, Department of Medicine, Northwestern University, Chicago, IL, USA
| | - E Savarino
- Division of Gastroenterology, Department of Surgical, Oncological and Gastroenterological Sciences, Padua, Italy
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Sobrino-Cossío S, Soto-Pérez J, Coss-Adame E, Mateos-Pérez G, Teramoto Matsubara O, Tawil J, Vallejo-Soto M, Sáez-Ríos A, Vargas-Romero J, Zárate-Guzmán A, Galvis-García E, Morales-Arámbula M, Quiroz-Castro O, Carrasco-Rojas A, Remes-Troche J. Post-fundoplication symptoms and complications: Diagnostic approach and treatment. REVISTA DE GASTROENTEROLOGÍA DE MÉXICO (ENGLISH EDITION) 2017. [DOI: 10.1016/j.rgmxen.2017.02.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
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10
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Sobrino-Cossío S, Soto-Pérez JC, Coss-Adame E, Mateos-Pérez G, Teramoto Matsubara O, Tawil J, Vallejo-Soto M, Sáez-Ríos A, Vargas-Romero JA, Zárate-Guzmán AM, Galvis-García ES, Morales-Arámbula M, Quiroz-Castro O, Carrasco-Rojas A, Remes-Troche JM. Post-fundoplication symptoms and complications: Diagnostic approach and treatment. REVISTA DE GASTROENTEROLOGÍA DE MÉXICO 2017; 82:234-247. [PMID: 28065591 DOI: 10.1016/j.rgmx.2016.08.005] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/04/2016] [Revised: 06/13/2016] [Accepted: 08/16/2016] [Indexed: 12/12/2022]
Abstract
Laparoscopic Nissen fundoplication is currently considered the surgical treatment of choice for gastroesophageal reflux disease (GERD) and its long-term effectiveness is above 90%. Adequate patient selection and the experience of the surgeon are among the predictive factors of good clinical response. However, there can be new, persistent, and recurrent symptoms after the antireflux procedure in up to 30% of the cases. There are numerous causes, but in general, they are due to one or more anatomic abnormalities and esophageal and gastric function alterations. When there are persistent symptoms after the surgical procedure, the surgery should be described as "failed". In the case of a patient that initially manifests symptom control, but the symptoms then reappear, the term "dysfunction" could be used. When symptoms worsen, or when symptoms or clinical situations appear that did not exist before the surgery, this should be considered a "complication". Postoperative dysphagia and dyspeptic symptoms are very frequent and require an integrated approach to determine the best possible treatment. This review details the pathophysiologic aspects, diagnostic approach, and treatment of the symptoms and complications after fundoplication for the management of GERD.
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Affiliation(s)
- S Sobrino-Cossío
- Servicio de Endoscopia, Hospital Ángeles del Pedregal, Ciudad de México, México.
| | - J C Soto-Pérez
- Clínica de Fisiología Digestiva (Motilab), Clínica Medivalle, Ciudad de México, México; Clínica de Fisiología Digestiva, Hospital Ángeles Metropolitano, Ciudad de México, México; Servicio de Endoscopia, Hospital Central Sur de Alta Especialidad PEMEX, Ciudad de México, México
| | - E Coss-Adame
- Laboratorio de Motilidad y Fisiología Digestiva, Instituto Nacional de Ciencias Médicas y de la Nutrición «Dr. Salvador Zubirán», Ciudad de México, México
| | - G Mateos-Pérez
- Servicio de Endoscopia, Hospital Ángeles del Pedregal, Ciudad de México, México
| | | | - J Tawil
- Departamento de Trastornos Funcionales Digestivos, Gedyt-Gastroenterología Diagnóstica y Terapéutica, Buenos Aires, Argentina
| | - M Vallejo-Soto
- Servicio de Cirugía General, Hospital Ángeles de Querétaro, Querétaro, México
| | - A Sáez-Ríos
- Servicio de Cirugía General, Hospital Central Militar, Ciudad de México, México
| | | | - A M Zárate-Guzmán
- Unidad de Endoscopia, Hospital General de México «Dr. Eduardo Liceaga», Ciudad de México, México
| | - E S Galvis-García
- Unidad de Gastroenterología, Hospital Privado, Guadalajara, Jalisco, México
| | - M Morales-Arámbula
- Unidad de Radiología, Hospital Ángeles del Pedregal, Ciudad de México, México
| | - O Quiroz-Castro
- Servicio de Cirugía General, Hospital Ángeles del Pedregal, Ciudad de México, México
| | - A Carrasco-Rojas
- Laboratorio de Motilidad y Fisiología Digestiva, Instituto de Investigaciones Médico-Biológicas, Universidad Veracruzana, Veracruz, México
| | - J M Remes-Troche
- Laboratorio de Motilidad y Fisiología Digestiva, Instituto de Investigaciones Médico-Biológicas, Universidad Veracruzana, Veracruz, México
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11
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Weijenborg PW, Smout AJPM, Bredenoord AJ. Esophageal acid sensitivity and mucosal integrity in patients with functional heartburn. Neurogastroenterol Motil 2016; 28:1649-1654. [PMID: 27194216 DOI: 10.1111/nmo.12864] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/30/2015] [Accepted: 04/25/2016] [Indexed: 12/20/2022]
Abstract
BACKGROUND Patients with functional heartburn (FH) experience troublesome heartburn that is not related to gastroesophageal reflux. The etiology of the heartburn sensation in FH patients is unknown. In patients with reflux disease, esophageal hypersensitivity seems associated with impaired mucosal integrity. We aimed to determine esophageal sensitivity and mucosal integrity in FH and non-erosive reflux disease (NERD) patients. METHODS In this prospective experimental study, we performed an acid perfusion test and upper endoscopy with biopsies in 12 patients with NERD and nine patients with FH. Mucosal integrity was measured during endoscopy using electrical tissue impedance spectroscopy and biopsy specimens were analyzed in Ussing chambers for transepithelial electrical resistance and transepithelial permeability. KEY RESULTS Lag time to heartburn perception was significantly longer in FH patients (median 12 min) than in NERD patients (median 3 min). Once perceived, intensity of heartburn was scored equal with median visual analog scale 6.5 and 7.1 respectively. Esophageal mucosal integrity was also comparable between FH and NERD patients, both in vivo extracellular impedance and ex vivo transepithelial resistance and permeability were similar. CONCLUSIONS & INFERENCES Patients with FH did not show acid hypersensitivity as seen in patients with NERD. However, once perceived, intensity of heartburn is similar. Esophageal mucosal integrity is similar between NERD and FH patients, and is therefore unlikely to be the underlying cause of the observed difference in esophageal acid perception.
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Affiliation(s)
- P W Weijenborg
- Department of Gastroenterology and Hepatology, Academic Medical Center, Amsterdam, The Netherlands
| | - A J P M Smout
- Department of Gastroenterology and Hepatology, Academic Medical Center, Amsterdam, The Netherlands
| | - A J Bredenoord
- Department of Gastroenterology and Hepatology, Academic Medical Center, Amsterdam, The Netherlands.
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12
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Brock C, McCallum RW, Gyawali CP, Farmer AD, Frøkjaer JB, McMahon BP, Drewes AM. Neurophysiology and new techniques to assess esophageal sensory function: an update. Ann N Y Acad Sci 2016; 1380:78-90. [DOI: 10.1111/nyas.13175] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2016] [Revised: 06/10/2016] [Accepted: 06/15/2016] [Indexed: 12/19/2022]
Affiliation(s)
- Christina Brock
- Mech-Sense, Department of Gastroenterology and Hepatology, Aalborg University Hospital and Clinical Institute; Aalborg University; Aalborg Denmark
| | - Richard W. McCallum
- Department of Internal Medicine; Texas Tech University Health Sciences Center; El Paso Texas
| | - C. Prakash Gyawali
- Division of Gastroenterology; Washington University School of Medicine; St. Louis Missouri
| | - Adam D. Farmer
- Mech-Sense, Department of Gastroenterology and Hepatology, Aalborg University Hospital and Clinical Institute; Aalborg University; Aalborg Denmark
- Centre for Digestive Diseases, Blizard Institute, Wingate Institute of Neurogastroenterology, Barts and the London School of Medicine and Dentistry; Queen Mary University of London; London United Kingdom
- Department of Gastroenterology; University Hospitals of North Midlands; Stoke on Trent United Kingdom
| | - Jens Brøndum Frøkjaer
- Mech-Sense, Department of Radiology, Aalborg University Hospital and Clinical Institute; Aalborg University; Aalborg Denmark
| | - Barry P. McMahon
- Department of Medical Physics and Clinical Engineering; Tallaght Hospital and Trinity College; Dublin Ireland
| | - Asbjørn Mohr Drewes
- Mech-Sense, Department of Gastroenterology and Hepatology, Aalborg University Hospital and Clinical Institute; Aalborg University; Aalborg Denmark
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13
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The Proton Pump Inhibitor Non-Responder: A Clinical Conundrum. Clin Transl Gastroenterol 2015; 6:e106. [PMID: 26270485 PMCID: PMC4816276 DOI: 10.1038/ctg.2015.32] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/06/2015] [Accepted: 06/22/2015] [Indexed: 12/12/2022] Open
Abstract
Gastroesophageal reflux disease (GERD) is a highly prevalent chronic condition where in stomach contents reflux into the esophagus causing symptoms, esophageal injury, and subsequent complications. Proton pump inhibitors (PPI) remain the mainstay of therapy for acid suppression. Despite their efficacy, significant proportions of GERD patients are either partial or non-responders to PPI therapy. Patients should be assessed for mechanisms that can lead to PPI failure and may require further evaluation to investigate for alternative causes. This monograph will outline a diagnostic approach to the PPI non-responder, review mechanisms associated with PPI failure, and discuss therapeutic options for those who fail to respond to PPI therapy.
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Kim SE, Kim N, Oh S, Kim HM, Park MI, Lee DH, Jung HC. Predictive factors of response to proton pump inhibitors in korean patients with gastroesophageal reflux disease. J Neurogastroenterol Motil 2015; 21:69-77. [PMID: 25537676 PMCID: PMC4288103 DOI: 10.5056/jnm14078] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/03/2014] [Revised: 11/06/2014] [Accepted: 11/09/2014] [Indexed: 12/22/2022] Open
Abstract
Background/Aims Proton pump inhibitors (PPIs) are widely used in the treatment of gastroesophageal reflux disease (GERD). However, some patients fail to respond to PPI therapy. We investigated the efficacy of response to PPI therapy in patients with GERD symptoms. Methods A total of 179 subjects with GERD symptoms were prospectively enrolled and diagnosed with non-erosive reflux disease (NERD, n = 100) and erosive reflux disease (n = 79) by gastroscopy and Bernstein test and/or 24-hour esophageal pH testing. Subjects then received a standard dose of daily PPI therapy for at least 4 weeks. PPI therapy response was evaluated using questionnaires including questions about demographics, GERD symptoms, GERD impact scale, Epworth sleepiness scale, Pittsburgh sleep quality index (PSQI), hospital anxiety and depression scale, and abbreviated version of the World Health Organization quality of life scale. Results The rates of complete (≥ 80%), satisfactory (≥ 50%), partial (< 50%), and refractory response in the 179 participants were 41.3%, 30.2%, 18.4%, and 10.1%, respectively. Thus, overall response rate (complete and satisfactory responses) was 71.5%. Multivariate analysis showed body mass index < 23 kg/m2 (OR, 2.20; 95% CI, 1.12–4.34), higher total PSQI score (OR, 1.20; 95% CI, 1.05–1.35), history of psychotherapy or neuropsychiatric medication (OR, 2.44; 95% CI, 1.23–4.85), and NERD (OR, 3.30; 95% CI, 1.54–7.11) were associated with poor response to PPI therapy. Conclusions Psychological factors, sleep dysfunction, body mass index < 23 kg/m2, and NERD seem to be the major factors that lead to a poor response to PPI treatment in patients with GERD symptoms.
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Affiliation(s)
- Sung Eun Kim
- Department of Internal Medicine, Seoul National University Bundang Hospital, Seongnam, Gyeonggi-do, Korea
| | - Nayoung Kim
- Department of Internal Medicine, Seoul National University Bundang Hospital, Seongnam, Gyeonggi-do, Korea
| | - Sooyeon Oh
- Department of Internal Medicine and Liver Research Institute, Seoul National University College of Medicine, Seoul, Korea
| | - Hee Man Kim
- Departments of Internal Medicine, Yonsei University Wonju College of Medicine, Wonju, Gangwon-do, Korea
| | - Moo In Park
- Department of Internal Medicine, Kosin University College of Medicine, Busan, Korea
| | - Dong Ho Lee
- Department of Internal Medicine, Seoul National University Bundang Hospital, Seongnam, Gyeonggi-do, Korea
| | - Hyun Chae Jung
- Department of Internal Medicine and Liver Research Institute, Seoul National University College of Medicine, Seoul, Korea
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15
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Lehrer PM, Gevirtz R. Heart rate variability biofeedback: how and why does it work? Front Psychol 2014; 5:756. [PMID: 25101026 PMCID: PMC4104929 DOI: 10.3389/fpsyg.2014.00756] [Citation(s) in RCA: 351] [Impact Index Per Article: 35.1] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2014] [Accepted: 06/27/2014] [Indexed: 11/15/2022] Open
Abstract
In recent years there has been substantial support for heart rate variability biofeedback (HRVB) as a treatment for a variety of disorders and for performance enhancement (Gevirtz, 2013). Since conditions as widely varied as asthma and depression seem to respond to this form of cardiorespiratory feedback training, the issue of possible mechanisms becomes more salient. The most supported possible mechanism is the strengthening of homeostasis in the baroreceptor (Vaschillo et al., 2002; Lehrer et al., 2003). Recently, the effect on the vagal afferent pathway to the frontal cortical areas has been proposed. In this article, we review these and other possible mechanisms that might explain the positive effects of HRVB.
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Affiliation(s)
- Paul M Lehrer
- Department of Psychiatry, Rutgers - Robert Wood Johnson Medical School Piscataway, NJ, USA
| | - Richard Gevirtz
- California School of Professional Psychology, Alliant University San Diego, CA, USA
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Cicala M, Emerenziani S, Guarino MPL, Ribolsi M. Proton pump inhibitor resistance, the real challenge in gastro-esophageal reflux disease. World J Gastroenterol 2013; 19:6529-6535. [PMID: 24151377 PMCID: PMC3801364 DOI: 10.3748/wjg.v19.i39.6529] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/25/2013] [Revised: 07/30/2013] [Accepted: 08/16/2013] [Indexed: 02/06/2023] Open
Abstract
Gastro-esophageal reflux disease (GERD) is one of the most prevalent chronic diseases. Although proton pump inhibitors (PPIs) represent the mainstay of treatment both for healing erosive esophagitis and for symptom relief, several studies have shown that up to 40% of GERD patients reported either partial or complete lack of response of their symptoms to a standard PPI dose once daily. Several mechanisms have been proposed as involved in PPIs resistance, including ineffective control of gastric acid secretion, esophageal hypersensitivity, ultrastructural and functional changes in the esophageal epithelium. The diagnostic evaluation of a refractory GERD patients should include an accurate clinical evaluation, upper endoscopy, esophageal manometry and ambulatory pH-impedance monitoring, which allows to discriminate non-erosive reflux disease patients from those presenting esophageal hypersensitivity or functional heartburn. Treatment has been primarily based on doubling the PPI dose or switching to another PPI. Patients with proven disease, not responding to PPI twice daily, are eligible for anti-reflux surgery.
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17
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Harrington AM, Brierley SM, Isaacs NJ, Young RL, Blackshaw LA. Identifying spinal sensory pathways activated by noxious esophageal acid. Neurogastroenterol Motil 2013; 25:e660-8. [PMID: 23848546 DOI: 10.1111/nmo.12180] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/25/2013] [Revised: 05/17/2013] [Accepted: 06/11/2013] [Indexed: 12/11/2022]
Abstract
BACKGROUND The transient receptor potential vanilloid 1 (TRPV1) channel is critical for spinal afferent signaling of burning pain throughout the body. Such pain frequently originates from the esophagus, following acid reflux. The contribution of TRPV1 to spinal nociceptor signaling from the esophagus remains unclear. We aimed to identify the spinal afferent pathways that convey nociceptive signaling from the esophagus, specifically those sensitive to acid, and the extent to which TRPV1 contributes. METHODS Acid/pepsin (150 mM HCl/1 mg mL(-1) pepsin) or saline/pepsin was perfused into the esophageal lumen of anesthetized wild-type and TRPV1 null mice over 20 min, followed by atraumatic perfuse fixation and removal of the cervical and thoracic spinal cord and dorsal root ganglia (DRG). To identify neurons responsive to esophageal perfusate, immunolabeling for neuronal activation marker phosphorylated extracellular receptor-regulated kinase (pERK) was used. Labeling for calcitonin gene-related peptide (CGRP) and isolectin B4 (IB4) was then used to characterize responsive neurons. KEY RESULTS Esophageal acid/pepsin perfusion significantly increased the number of pERK-immunoreactive (IR) neurons in the DRG and the cervical and thoracic spinal cord dorsal horn (DH) relative to saline/pepsin (DRG P < 0.01; cervical DH P < 0.05 and thoracic DH P < 0.005). The number of pERK-IR neurons following acid perfusion was significantly attenuated in TRPV1 -/- mice (DH P < 0.05 and DRG P < 0.05). CONCLUSIONS & INFERENCES This study has identified populations of spinal afferent DRG neurons and DH neurons involved in signaling of noxious acid from the esophagus. There is a major contribution of TRPV1 to signaling within these pathways.
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Affiliation(s)
- A M Harrington
- Nerve-Gut Research Laboratory, Discipline of Medicine, Faculty of Health Sciences, The University of Adelaide, Adelaide, South Australia, Australia; Department of Gastroenterology and Hepatology, Hanson Institute, Royal Adelaide Hospital, Adelaide, South Australia, Australia
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18
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Hultin L, Nissen TD, Kakol-Palm D, Lindström E. Colorectal distension-evoked potentials in awake rats: a novel method for studies of visceral sensitivity. Neurogastroenterol Motil 2012; 24:964-e466. [PMID: 22925114 DOI: 10.1111/nmo.12005] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
BACKGROUND Quantification of the visceromotor response induced by colorectal distension (CRD) in rodents is commonly used for preclinical studies of visceral pain. The model is well established but does not fully assess the central response to stimulation. The aim of this study was to establish a novel model assessing cerebral evoked potentials (CEPs) in response to CRD in awake rats. METHODS Epidural recording electrodes were chronically implanted in the skull of female Sprague-Dawley rats. Colorectal distension-induced CEPs were recorded using either rapid balloon distensions (100 ms, 20-80 mmHg) or electric stimulation (1 ms, 1-4 mA) using stimulation probes placed in the distal colon. KEY RESULTS Colorectal distension-induced CEPs were separated in three partly temporally overlapping components consisting of five prominent peaks. Peak latencies at 80 mmHg were (P1, N1) 23 ± 1 and 55 ± 4 ms, (N2, P2a, P2b) 91 ± 3, 143 ± 5 and 174 ± 3 ms, and (P3) 297 ± 3 ms. Amplitudes and latencies were, except for the early component, intensity dependent. Intrarectal administration of lidocaine significantly reduced the amplitude of N2 (by 42 ± 6%, P < 0.001) and P2 (by 34 ± 6%, P < 0.001). Electrically induced CEPs were intensity dependent and had similar topography and latencies as the mechanical evoked potentials (P1: 26 ± 2 ms; N1: 61 ± 1 ms; P2: 84 ± 6 ms; N2: 154 ± 6 ms; P3: 326 ± 10 ms), but there were large variations in amplitudes in between repeated electrical stimulations. CONCLUSIONS & INFERENCES Colorectal distension-induced CEPs can be recorded reliably in awake rats and may serve as a surrogate marker of colonic sensation and be a useful parameter in studies of visceral sensitivity.
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Affiliation(s)
- L Hultin
- Integrative Pharmacology, AstraZeneca R&D, Mölndal, Sweden.
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19
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Sharma A, Paine P, Rhodes S, Warburton F, Chua YC, Aziz Q. The autonomic response to human esophageal acidification and the development of hyperalgesia. Neurogastroenterol Motil 2012; 24:e285-93. [PMID: 22672237 DOI: 10.1111/j.1365-2982.2012.01929.x] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
BACKGROUND Distal esophageal acidification induces variable hyperalgesia in the non-acid exposed proximal esophagus. As the autonomic nervous system (ANS) modulates nociception, the aim was to determine whether autonomic reactivity to acid infusion predicted inter-individual differences in hyperalgesia. METHODS In 25 healthy volunteers (18 women, age range 22-58, mean 36.5 years), using a double-blind, placebo-controlled crossover design, pain thresholds to electrical stimulation were determined in the proximal esophagus and foot (control) pre and post a 30-min distal esophageal infusion of 0.15 mol L(-1) HCl or saline with autonomic monitoring. Sympathetic Cardiac Sympathetic Index and Skin Conductance Response and parasympathetic Cardiac Vagal Tone and Cardiac Sensitivity to Baroreflex measures were derived. Plasma cortisol was measured pre and post infusion as were anxiety and unpleasantness. KEY RESULTS Acid infusion reduced group pain threshold in the proximal esophagus (adjusted mean change -5.0 mA vs saline +3.4 mA, P < 0.001), and raised sympathetic measures (Cardiac Sympathetic Index, Skin Conduction Response) and cortisol levels, but reduced parasympathetic measures (cardiac vagal tone and cardiac sensitivity to Baroreflex) (all P < 0.05). Acid infusion also increased anxiety and unpleasantness scores (both P < 0.05). In 16 acid-sensitizers, the degree of hyperalgesia correlated with increasing heart rate (r = -0.66, P = 0.005), and fall in cardiac vagal tone (r = 0.54, P = 0.03) and Cardiac Sensitivity to Baroreflex (r = 0.54, P = 0.03). CONCLUSIONS & INFERENCES Acid-induced esophageal hyperalgesia correlated with reduced parasympathetic tone, suggesting that the parasympathetic nervous system may have anti hyperalgesic properties. Additional studies on the autonomic modulation of esophageal hyperalgesia are required.
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Affiliation(s)
- A Sharma
- GI Science Group, Salford Royal Foundation Trust, Salford, UK
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20
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Meng QW, Xu SC. Advances in research of esophageal visceral hypersensitivity. Shijie Huaren Xiaohua Zazhi 2012; 20:568-573. [DOI: 10.11569/wcjd.v20.i7.568] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Gastroesophageal reflux disease (GERD) is a common disorder that is often associated with unpleasant symptoms requiring utilization of health care resource. Both animal and clinical studies suggest that a variety of receptors on afferent nerves sensitized upon exposure to acid increase afferent input to the spinal cord dorsal horn neurons and lead to a reduction in threshold of these neurons together with an increase in their receptive field. This increased sensitivity of primary afferent nerves is described as peripheral sensitization, whereas the consequent increase in sensitivity of the spinal dorsal horn neurons is described as central sensitization. Once these mechanisms have been established, they can cause a long-term increase in sensitivity of tissues to previously innocuous stimuli. Furthermore, psychological stress and mechanical stimulation both have been shown to increase DIS and may therefore facilitate peripheral sensitization. Currently peripheral and central sensitizations are considered to be important mechanisms of esophageal pain hypersensitivity and occurrence of symptoms to even physiological amounts of acid. In these patients treatments aimed at reducing neuronal sensitivity may be effective. This article mainly focuses on the recent advances in research of esophageal visceral hypersensitivity.
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21
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Abstract
Gastroesophageal reflux (GER) affects ∼10-20% of American adults. Although symptoms are equally common in men and women, we hypothesized that sex influences diagnostic and therapeutic approaches in patients with GER. PubMed database between 1997 and October 2011 was searched for English language studies describing symptoms, consultative visits, endoscopic findings, use and results of ambulatory pH study, and surgical therapy for GER. Using data from Nationwide Inpatient Sample, Healthcare Cost and Utilization Project, Agency for Healthcare Research and Quality, we determined the sex distribution for admissions and reflux surgery between 1997 and 2008. Studies on symptoms or consultative visits did not show sex-specific differences. Even though women are less likely to have esophagitis or Barrett's esophagus, endoscopic studies enrolled as many women as men, and women were more likely to undergo ambulatory pH studies with a female predominance in studies from the US. Surgical GER treatment is more commonly performed in men. However, studies from the US showed an equal sex distribution, with Nationwide Inpatient Sample data demonstrating an increase in women who accounted for 63% of the annual fundoplications in 2008. Despite less common or severe mucosal disease, women are more likely to undergo invasive diagnostic testing. In the US, women are also more likely to undergo antireflux surgery. These results suggest that healthcare-seeking behavior and socioeconomic factors rather than the biology of disease influence the clinical approaches to reflux disease.
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Domingues GRDS, Moraes-Filho JPP, Domingues AGL. Impact of prolonged 48-h wireless capsule esophageal pH monitoring on diagnosis of gastroesophageal reflux disease and evaluation of the relationship between symptoms and reflux episodes. ARQUIVOS DE GASTROENTEROLOGIA 2011; 48:24-9. [PMID: 21537538 DOI: 10.1590/s0004-28032011000100006] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/04/2010] [Accepted: 09/21/2010] [Indexed: 01/15/2023]
Abstract
CONTEXT Gastroesophageal reflux disease is one of the most common digestive diseases and an important cause of distress to patients. Diagnosis of this condition can require ambulatory pH monitoring. OBJECTIVES To determine the diagnostic yield of a wireless ambulatory pH monitoring system of 48-hours, recording to diagnose daily variability of abnormal esophageal acid exposure and its symptom association. METHODS A total of 100 consecutive patients with persistent reflux symptoms underwent wireless pH capsule placement from 2004 to 2009. The wireless pH capsule was deployed 5 cm proximal to the squamocolumnar junction after lower esophageal sphincter was manometrically determined. The pH recordings over 48-h were obtained after uploading data to a computer from the receiver that recorded pH signals from the wireless pH capsule. The following parameters were analyzed: (1) percentual time of distal esophageal acid exposure; (2) symptom association probability related to acid reflux. The results between the first and the second day were compared, and the diagnostic yield reached when the second day monitoring was included. RESULTS Successful pH data over 48-h was obtained in 95% of patients. Nearly one quarter of patients experienced symptoms ranging from a foreign body sensation to chest pain. Forty-eight hours pH data analysis was statistically significant when compared to isolated analysis of day 1 and day 2. Study on day 2 identified seven patients (30.4%) that would be missed if only day 1 was analyzed. Three patients (18.7%) out of 16 patients with normal esophageal acid exposure on both days, showed positive symptom association probability, which generated an increase in diagnostic yield of 43.4%. CONCLUSION Esophageal pH monitoring with wireless capsule is safe, well tolerated, does not require sedation. The extended 48-h period of study poses an increased yield to diagnose gastroesophageal reflux disease patients.
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Wang K, Duan LP, Zeng XZ, Liu JY, Xu-Chu W. Differences in cerebral response to esophageal acid stimuli and psychological anticipation in GERD subtypes--an fMRI study. BMC Gastroenterol 2011; 11:28. [PMID: 21439078 PMCID: PMC3073936 DOI: 10.1186/1471-230x-11-28] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/18/2010] [Accepted: 03/26/2011] [Indexed: 12/14/2022] Open
Abstract
Background To evaluate whether there are differences in the cerebral response to intraesophageal acid and psychological anticipation stimuli among subtypes of gastroesophageal reflux disease (GERD). Methods Thirty nine patients with GERD and 11 healthy controls were enrolled in this study after gastroscopy and 24 hr pH monitoring. GERD subjects were divided into four subgroups: RE (reflux esophagitis), NERD+ (non-erosive reflux disease with excessive acid reflux), NERD-SI+ (normal acid exposure and positive symptom index) and NERD-SI+ (normal acid exposure and negative symptom index, but responded to proton pump inhibitor trial). Cerebral responses to intraesophageal acid and psychological anticipation were evaluated with fMRI. Results During intraesophageal acid stimulation, the prefrontal cortex (PFC) region was significantly activated in all subgroups of GERD; the insular cortex (IC) region was also activated in RE, NERD+ and NERD-SI- groups; the anterior cingulated cortex (ACC) region was activated only in RE and NERD-SI- groups. The RE subgroup had the shortest peak time in the PFC region after acid was infused, and presented the greatest change in fMRI signals in the PFC and ACC region (P = 0.008 and P = 0.001, respectively). During psychological anticipation, the PFC was significantly activated in both the control and GERD groups. Activation of the IC region was found in the RE, NERD-SI+ and NERD-SI- subgroups. The ACC was activated only in the NERD-SI+ and NERD-SI- subgroups. In the PFC region, the NERD-SI- subgroup had the shortest onset time (P = 0.008) and peak time (P < 0.001). Compared with actual acid infusion, ACC in RE and IC in NERD+ were deactivated while additional areas including the IC and ACC were activated in the NERD-SI+ group; and in NERD-SI- group, onset-time and peak time in the PFC and IC areas were obviously shorter in induced anticipation than in actual acid infusion. Conclusions The four subgroups of GERD patients and controls showed distinctly different activation patterns and we therefore conclude GERD patients have different patterns of visceral perception and psychological anticipation. Psychological factors play a more important role in NERD-SI+ and NERD-SI- groups than in RE and NERD+ groups.
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Affiliation(s)
- Kun Wang
- Department of Gastroenterology, Peking University Third Hospital, Beijing, 100191, PR China
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24
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Xu S, Zheng F, Zhao X, Chen Y, Kong X, Wang C, Zhu L, Wang Z. Brain processing of visceral sensation upon esophageal chemical stimulation in different types of GERD. Eur J Radiol 2011; 75:352-9. [PMID: 20434286 DOI: 10.1016/j.ejrad.2010.03.025] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2009] [Revised: 03/26/2010] [Accepted: 03/26/2010] [Indexed: 12/12/2022]
Abstract
We designed to investigate the cortical response to esophageal acid exposure in different types of gastroesophageal reflux disease (GERD) by functional magnetic resonance imaging (fMRI). Fifteen healthy volunteers, 13 with reflux esophagitis (RE), 12 with non-erosive reflux disease with abnormal acid reflux (NERD+) and nine with non-erosive reflux disease with normal acid reflux (NERD-) received intraesophageal perfusion with isotonic saline followed by 0.1 N hydrochloric acid. Modified block-design model of fMRI scanning was performed simultaneously to the intraesophageal perfusion. The sensitized regions in different types of GERD were not completely identical but were more widely distributed compared to the sensitized regions in the healthy individuals. The activated intensity of the ACC was significantly higher in the healthy volunteers compared to the GERD patients (P<0.001). Nevertheless, healthy volunteers exhibited a significantly lighter intensity in the right side of the DLPFC (P<0.001) and a lower intensity in the left side of the insula than the GERD patients (P<0.05). In conclusion, the underlying central mechanisms of esophageal visceral sensation in different types of GERD patients are quite different. The deactivation of the ACC, the activation of the right side of the DLPFC and the right side of the insula may play an important role in the occurrence of GERD.
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Affiliation(s)
- ShuChang Xu
- Department of Gastroenterology, Tongji Hospital, Tongji University School of Medicine, Shanghai 200065, China.
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25
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Chua YC, Aziz Q. Perception of gastro-oesophageal reflux. Best Pract Res Clin Gastroenterol 2010; 24:883-91. [PMID: 21126701 DOI: 10.1016/j.bpg.2010.10.003] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/06/2010] [Accepted: 10/08/2010] [Indexed: 01/31/2023]
Abstract
Gastro-oesophageal reflux disease (GORD) is common and often associated with unpleasant symptoms requiring utilisation of health care resource. While in the majority of patients symptom resolution occurs with acid suppressant therapy, in a proportion this treatment is ineffective in resolving symptoms. This is particularly the case in patients with non-erosive reflux disease (NERD) and functional heartburn (FH). It is increasingly being recognised that the presence of acid in the oesophagus can cause dilated intercellular spaces (DIS) which increases the exposure of the sub-epithelial nerves to the acid. Experimental studies in both animals and humans suggest that a variety of receptors on afferent nerves can be sensitised upon exposure to acid so that there is increased afferent input to the spinal cord dorsal horn neurons which leads to a reduction in threshold of these neurons together with an increase in their receptive field. This increased sensitivity of primary afferent nerves is described as peripheral sensitisation, whereas the consequent increase in sensitivity of the spinal dorsal horn neurons is described as central sensitisation. Once these mechanisms have been established they can cause a long term increase in sensitivity of tissues to previously innocuous stimuli. Furthermore, psychological stress has been shown to increase DIS and may therefore facilitate peripheral sensitisation. Currently peripheral and central sensitisations are considered to be important mechanisms of oesophageal pain hypersensitivity and occurrence of symptoms to even physiological amounts of acid. In these patients treatments aimed at reducing neuronal sensitivity may be effective in the management.
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Affiliation(s)
- Y C Chua
- Blizard Institute of Cell and Molecular Science, University of London, UK
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26
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Abstract
PURPOSE OF REVIEW Gastroesophageal reflux disease (GERD) is a common chronic disorder often successfully treated, although there are several evolving issues in management. We reviewed the issues related to unmet needs over the past 12 months. RECENT FINDINGS A substantial number of patients fail to respond adequately to once or even twice daily proton pump inhibitor (PPI). There is no standard definition of PPI failure in GERD; a universally accepted definition for treatment success is also not available. Differentiation between erosive esophagitis and nonerosive reflux disease can be made but requires endoscopy; but studies still confuse functional heartburn and nonerosive reflux disease, which impacts management. Acid reflux plays an important role in GERD pathogenesis and the precise role of acid requires more studies of differences between erosive esophagitis and nonerosive reflux disease symptom generation and the implication of nocturnal acidification. Several possible mechanisms may explain GERD refractory to PPIs. SUMMARY Management of PPI nonresponders remains a challenge. Objective and precise evaluation of symptoms and treatment response requires study in high-quality trials. New therapeutic approaches are under investigation to answer unmet needs and improve erosive esophagitis healing rates and symptom control.
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Abstract
Visceral hypersensitivity is regarded as an important factor in the pathogenesis of functional gastrointestinal disorders. Assessment of visceral sensitivity has several important aims: increasing the understanding of normal and abnormal visceral sensory mechanisms and participating sensory pathways, serving as diagnostic tool to detect patients with abnormal visceral sensitivity, and evaluating therapeutic interventions directed towards modification of visceral sensitivity. Current stimulation modes in sensitivity tests include mechanical distension by barostat or tensostat, nutrient drink or water load, chemical stimulation, e.g. acid provocation or capsaicin ingestion, electrical, or thermal stimulation. Multimodal probes incorporating several stimulation modes in one device have recently been developed. Assessment of visceral sensation can be based on subjective responses of conscious perception or on objective parameters such as visceromotoric responses or central sensory processing patterns. All methods face the challenge that visceral sensitivity may be influenced by a wide spectrum of different factors, including the test techniques themselves, and improved, preferably non-invasive sensitivity tests with a greater standardisation and a broader applicability are still needed.
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Affiliation(s)
- Viola Andresen
- Israelitic Hospital, Orchideenstieg 14, 22297 Hamburg, Germany.
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Abstract
Functional heartburn is considered one of the most common functional esophageal disorders. The disorder is more common in young women and is associated with other functional bowel disorders and psychological co-morbidity, primarily somatization. The etiology of functional heartburn remains unknown. Most patients, however, demonstrate esophageal hypersensitivity. Functional heartburn has been identified as the main cause for proton pump inhibitor (PPI) failure in patients with heartburn. Treatment is still a challenge, and patients should be started with PPI treatment. In non-responders, escalation of the PPI dose could be attempted and, if unsuccessful, pain modulators should be prescribed.
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Affiliation(s)
- Ronnie Fass
- Section of Gastroenterology, Department of Medicine, Southern Arizona VA Health Care System and University of Arizona Health Sciences Center, GI Section (1-111G-1), 3601 South. 6th Avenue, Tucson, AZ 85723-0001, USA.
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