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Balakrishnan G, Bhat A, Naik D, Kim JS, Marukyan S, Gido L, Ritter M, Khair AS, Bettinger CJ. Gelatin-Based Ingestible Impedance Sensor to Evaluate Gastrointestinal Epithelial Barriers. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2023; 35:e2211581. [PMID: 36799712 PMCID: PMC10192083 DOI: 10.1002/adma.202211581] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/11/2022] [Revised: 02/03/2023] [Indexed: 05/17/2023]
Abstract
Low-profile and transient ingestible electronic capsules for diagnostics and therapeutics can replace widely used yet invasive procedures such as endoscopies. Several gastrointestinal diseases such as reflux disease, Crohn's disease, irritable bowel syndrome, and eosinophilic esophagitis result in increased intercellular dilation in epithelial barriers. Currently, the primary method of diagnosing and monitoring epithelial barrier integrity is via endoscopic tissue biopsies followed by histological imaging. Here, a gelatin-based ingestible electronic capsule that can monitor epithelial barriers via electrochemical impedance measurements is proposed. Toward this end, material-specific transfer printing methodologies to manufacture soft-gelatin-based electronics, an in vitro synthetic disease model to validate impedance-based sensing, and tests of capsules using ex vivo using porcine esophageal tissue are described. The technologies described herein can advance next generation of oral diagnostic devices that reduce invasiveness and improve convenience for patients.
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Affiliation(s)
- Gaurav Balakrishnan
- Materials Science and Engineering Department, Carnegie Mellon University, 5000 Forbes Avenue, Pittsburgh, PA, 15213, USA
| | - Arnav Bhat
- Biomedical Engineering Department, Carnegie Mellon University, 5000 Forbes Avenue, Pittsburgh, PA, 15213, USA
| | - Durva Naik
- Materials Science and Engineering Department, Carnegie Mellon University, 5000 Forbes Avenue, Pittsburgh, PA, 15213, USA
| | - Julie Shin Kim
- Biomedical Engineering Department, Carnegie Mellon University, 5000 Forbes Avenue, Pittsburgh, PA, 15213, USA
- Chemical Engineering Department, Carnegie Mellon University, 5000 Forbes Avenue, Pittsburgh, PA, 15213, USA
| | - Sona Marukyan
- Materials Science and Engineering Department, Carnegie Mellon University, 5000 Forbes Avenue, Pittsburgh, PA, 15213, USA
- Biomedical Engineering Department, Carnegie Mellon University, 5000 Forbes Avenue, Pittsburgh, PA, 15213, USA
| | - Lily Gido
- Biomedical Engineering Department, Carnegie Mellon University, 5000 Forbes Avenue, Pittsburgh, PA, 15213, USA
- Chemical Engineering Department, Carnegie Mellon University, 5000 Forbes Avenue, Pittsburgh, PA, 15213, USA
| | - Mia Ritter
- Materials Science and Engineering Department, Carnegie Mellon University, 5000 Forbes Avenue, Pittsburgh, PA, 15213, USA
- Biomedical Engineering Department, Carnegie Mellon University, 5000 Forbes Avenue, Pittsburgh, PA, 15213, USA
| | - Aditya S Khair
- Chemical Engineering Department, Carnegie Mellon University, 5000 Forbes Avenue, Pittsburgh, PA, 15213, USA
| | - Christopher J Bettinger
- Materials Science and Engineering Department, Carnegie Mellon University, 5000 Forbes Avenue, Pittsburgh, PA, 15213, USA
- Biomedical Engineering Department, Carnegie Mellon University, 5000 Forbes Avenue, Pittsburgh, PA, 15213, USA
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Dao HV, Hoang LB, Nguyen BP, Nguyen HL, Goldberg R, Allison J, Dao TMA, Matsumura T, Dao LV. Esophageal Mucosal Admittance: A New Technique to Diagnose Gastroesophageal Reflux Disease - Is It Feasible? Clin Exp Gastroenterol 2023; 16:45-54. [PMID: 37056486 PMCID: PMC10089276 DOI: 10.2147/ceg.s399764] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/30/2022] [Accepted: 03/28/2023] [Indexed: 04/15/2023] Open
Abstract
Purpose Esophageal mucosal admittance (MA) is a promising diagnostic method for gastroesophageal reflux disease (GERD). We conducted a study to describe the esophageal MA in patients with reflux symptoms and determine its diagnostic accuracy. Patients and Methods We recruited 92 patients with ambulatory pH-impedance monitoring, upper gastrointestinal endoscopy, and MA measured by the tissue conductance meter. MA was measured during endoscopy at 5cm (distal esophagus) and 15cm above the Z line (middle esophagus), repeated at least five times at each position, and median MA was obtained. Afterwards, two biopsies were taken 5cm above the Z line for histopathological evaluation using the Esohisto criteria. Patients were classified as GERD or non-GERD according to the 2018 Lyon consensus. Results The mean age was 43.2 years, and 42 patients were males. The most common symptoms were regurgitation (75.0%), belching (65.2%), and heartburn (46.7%). Twenty-three (32.3%) were diagnosed with GERD using the Lyon consensus, and 24 (26.1%) had esophagitis on histopathology. The median MA at the distal and middle esophagus was moderately correlated. The median MA at both positions was higher in the GERD group but only statistically significant in the middle esophagus. MA was not associated with pH-impedance parameters and esophagitis on histopathology. The diagnostic model developed using the logistic regression did not have good accuracy. Conclusion MA was not different between GERD and non-GERD patients.
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Affiliation(s)
- Hang Viet Dao
- Internal Medicine Faculty, Hanoi Medical University, Hanoi, Vietnam
- Endoscopy Center, Hanoi Medical University Hospital, Hanoi, Vietnam
- Institute of Gastroenterology and Hepatology, Hanoi, Vietnam
- Correspondence: Hang Viet Dao, Institute of Gastroenterology and Hepatology, Floor 10, VCCI Tower, No. 9, Dao Duy Anh Street, Dong Da District, Hanoi City, 10000, Vietnam, Tel +84987988075, Email
| | - Long Bao Hoang
- Institute of Gastroenterology and Hepatology, Hanoi, Vietnam
| | | | - Hoa Lan Nguyen
- Department of Population and Quantitative Health Sciences, University of Massachusetts Medical School, Worcester, MA, USA
| | - Robert Goldberg
- Department of Population and Quantitative Health Sciences, University of Massachusetts Medical School, Worcester, MA, USA
| | - Jeroan Allison
- Department of Population and Quantitative Health Sciences, University of Massachusetts Medical School, Worcester, MA, USA
| | - Thi Minh An Dao
- School of Public Health, University of Queensland, Brisbane, Australia
- Epidemiology Department, Hanoi Medical University, Hanoi, Vietnam
| | - Tomoaki Matsumura
- Department of Gastroenterology, Graduate School of Medicine, Chiba University, Chiba, Japan
| | - Long Van Dao
- Internal Medicine Faculty, Hanoi Medical University, Hanoi, Vietnam
- Institute of Gastroenterology and Hepatology, Hanoi, Vietnam
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Barnhart MA, Thomas ML, Schilthuis AJ, Jackson CD. Know Your Guidelines Series: The ACG Clinical Guideline for the Diagnosis and Management of Gastroesophageal Reflux Disease Review. South Med J 2022; 115:919-920. [DOI: 10.14423/smj.0000000000001473] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/29/2023]
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Ohkubo JI, Wakasugi T, Takeuchi S, Takahashi A, Nguyen TN, Suzuki H. Biophysical properties of the neck skin indicating potential complications of salvage surgery for laryngeal/hypopharyngeal cancer. Acta Otolaryngol 2022; 142:634-637. [DOI: 10.1080/00016489.2022.2117411] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022]
Affiliation(s)
- Jun-ichi Ohkubo
- Department of Otorhinolaryngology-Head and Neck Surgery, School of Medicine, University of Occupational and Environmental Health, Iseigaoka, Yahatanishi-ku, Japan
| | - Tetsuro Wakasugi
- Department of Otorhinolaryngology-Head and Neck Surgery, School of Medicine, University of Occupational and Environmental Health, Iseigaoka, Yahatanishi-ku, Japan
| | - Shoko Takeuchi
- Department of Otorhinolaryngology-Head and Neck Surgery, School of Medicine, University of Occupational and Environmental Health, Iseigaoka, Yahatanishi-ku, Japan
| | - Azusa Takahashi
- Department of Otorhinolaryngology-Head and Neck Surgery, School of Medicine, University of Occupational and Environmental Health, Iseigaoka, Yahatanishi-ku, Japan
| | - Thi Nga Nguyen
- Department of Otorhinolaryngology-Head and Neck Surgery, School of Medicine, University of Occupational and Environmental Health, Iseigaoka, Yahatanishi-ku, Japan
| | - Hideaki Suzuki
- Department of Otorhinolaryngology-Head and Neck Surgery, School of Medicine, University of Occupational and Environmental Health, Iseigaoka, Yahatanishi-ku, Japan
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Kuribayashi S, Hosaka H, Nakamura F, Nakata K, Sato K, Itoi Y, Hashimoto Y, Kasuga K, Tanaka H, Uraoka T. The role of endoscopy in the management of gastroesophageal reflux disease. DEN OPEN 2022; 2:e86. [PMID: 35310713 PMCID: PMC8828240 DOI: 10.1002/deo2.86] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/31/2021] [Revised: 11/14/2021] [Accepted: 11/27/2021] [Indexed: 11/05/2022]
Abstract
Gastroesophageal reflux disease (GERD) is a common disease that may cause a huge economic burden. Endoscopy is performed not only to rule out other organic diseases but also to diagnose reflux esophagitis or Barrett's esophagus. Non‐erosive GERD (non‐erosive reflux disease [NERD]) is called endoscopy‐negative GERD; however, GERD‐related findings could be obtained through histological assessment, image‐enhanced endoscopy, and new endoscopic modalities in patients with NERD. Moreover, endoscopy is useful to stratify the risk for the development of GERD. In addition, endoscopic treatments have been developed. These techniques could significantly improve patients’ quality of life as well as symptoms.
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Affiliation(s)
- Shiko Kuribayashi
- Department of Gastroenterology and Hepatology Gunma University Graduate School of Medicine Gunma Japan
| | - Hiroko Hosaka
- Department of Gastroenterology and Hepatology Gunma University Graduate School of Medicine Gunma Japan
| | - Fumihiko Nakamura
- Department of Gastroenterology and Hepatology Gunma University Graduate School of Medicine Gunma Japan
| | - Ko Nakata
- Department of Gastroenterology and Hepatology Gunma University Graduate School of Medicine Gunma Japan
| | - Keigo Sato
- Department of Gastroenterology and Hepatology Gunma University Graduate School of Medicine Gunma Japan
| | - Yuki Itoi
- Department of Gastroenterology and Hepatology Gunma University Graduate School of Medicine Gunma Japan
| | - Yu Hashimoto
- Department of Gastroenterology and Hepatology Gunma University Graduate School of Medicine Gunma Japan
| | - Kengo Kasuga
- Department of Gastroenterology and Hepatology Gunma University Graduate School of Medicine Gunma Japan
| | - Hirohito Tanaka
- Department of Gastroenterology and Hepatology Gunma University Graduate School of Medicine Gunma Japan
| | - Toshio Uraoka
- Department of Gastroenterology and Hepatology Gunma University Graduate School of Medicine Gunma Japan
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Ventrella D, Salaroli R, Elmi A, Carnevali G, Forni M, Baldi F, Bacci ML. A novel ex vivo porcine model of acid-induced esophageal damage for preliminary functional evaluations of anti-gastroesophageal reflux disease medical devices. Vet World 2020; 13:2728-2735. [PMID: 33487991 PMCID: PMC7811544 DOI: 10.14202/vetworld.2020.2728-2735] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2020] [Accepted: 11/04/2020] [Indexed: 11/29/2022] Open
Abstract
Aim The aim of the study was to set up a porcine ex vivo model of acid-induced damage and to evaluate its performance by means of multichannel intraluminal impedance and pH (MII-pH) live recording, histology, and Evans blue (EB) permeability assay. Materials and Methods Thirteen esophagi, collected at a slaughterhouse, were ablated of their sphincters, pinned upright on a support, and placed in a thermostatic hood at 37°C with two infusion tubes and an MII-pH probe inserted in the top end. Three esophagi (histology controls) were only left in the hood for 3.5 h before sampling, while the remaining organs underwent the experimental protocol including saline infusion and recovery recording, and acid solution infusion and recovery recording. Results MII-pH analysis highlighted a significantly stronger decrease during acid infusion when compared to saline, but a better post-infusion recovery for saline solution. At the end of the protocol, MII was still statistically lower than baseline. The acid-damaged esophagi significantly absorbed more EB dye, and histology revealed strong mucosal exfoliation. Conclusion The proposed model of esophageal acid damage seems to be repeatable, reliable, and achievable using organs collected at the slaughterhouse. MII recording proved to have good sensitivity in detecting mucosal alterations also in ex vivo trials.
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Affiliation(s)
- Domenico Ventrella
- Department of Veterinary Medical Sciences, University of Bologna, Ozzano dell'Emilia (BO), Italy
| | - Roberta Salaroli
- Department of Veterinary Medical Sciences, University of Bologna, Ozzano dell'Emilia (BO), Italy
| | - Alberto Elmi
- Department of Veterinary Medical Sciences, University of Bologna, Ozzano dell'Emilia (BO), Italy
| | - Giacomo Carnevali
- Department of Veterinary Medical Sciences, University of Bologna, Ozzano dell'Emilia (BO), Italy
| | - Monica Forni
- Department of Veterinary Medical Sciences, University of Bologna, Ozzano dell'Emilia (BO), Italy
| | - Fabio Baldi
- Center for the Study of Diseases of the Esophagus, University of Bologna, Bologna, Italy.,GVM Care and Research, Cotignola (RA), Italy
| | - Maria Laura Bacci
- Department of Veterinary Medical Sciences, University of Bologna, Ozzano dell'Emilia (BO), Italy
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The potential role of potassium-competitive acid blockers in the treatment of gastroesophageal reflux disease. Curr Opin Gastroenterol 2019; 35:344-355. [PMID: 31045597 DOI: 10.1097/mog.0000000000000543] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
PURPOSE OF REVIEW Gastroesophageal reflux disease (GERD) is primarily a motor disorder, but its pathogenesis is multifactorial. Although gastric acid secretion is usually normal in GERD patients, treatment with proton pump inhibitors (PPIs) has become the standard of care, despite increasing awareness of their shortcomings. In this article, a new class of antisecretory drugs (namely potassium-competitive acid blockers, P-CABs), developed to overcome these limitations, is discussed. RECENT FINDINGS P-CABs block the K exchange channel of the proton pump, resulting in rapid, competitive, reversible inhibition of acid secretion. These drugs offer a more rapid elevation of intragastric pH than PPIs, while maintaining similar antisecretory effect, the duration of which is dependent on half-life and can be prolonged with extended release formulations. Thus, P-CABs offer advances in the treatment of GERD including rapid heartburn relief, faster and more reliable healing of severe grades of erosive esophagitis, as a consequence of better control of nighttime acid secretion than PPIs. SUMMARY P-CABs overcome many of the drawbacks of PPIs. The unique antisecretory effects of vonoprazan might be especially useful in the long-term treatment of patients with Barrett's esophagus.
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