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Bagyánszki M, Bódi N. Key elements determining the intestinal region-specific environment of enteric neurons in type 1 diabetes. World J Gastroenterol 2023; 29:2704-2716. [PMID: 37274063 PMCID: PMC10237112 DOI: 10.3748/wjg.v29.i18.2704] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/15/2022] [Revised: 03/28/2023] [Accepted: 04/17/2023] [Indexed: 05/11/2023] Open
Abstract
Diabetes, as a metabolic disorder, is accompanied with several gastrointestinal (GI) symptoms, like abdominal pain, gastroparesis, diarrhoea or constipation. Serious and complex enteric nervous system damage is confirmed in the background of these diabetic motility complaints. The anatomical length of the GI tract, as well as genetic, developmental, structural and functional differences between its segments contribute to the distinct, intestinal region-specific effects of hyperglycemia. These observations support and highlight the importance of a regional approach in diabetes-related enteric neuropathy. Intestinal large and microvessels are essential for the blood supply of enteric ganglia. Bidirectional morpho-functional linkage exists between enteric neurons and enteroglia, however, there is also a reciprocal communication between enteric neurons and immune cells on which intestinal microbial composition has crucial influence. From this point of view, it is more appropriate to say that enteric neurons partake in multidirectional communication and interact with these key players of the intestinal wall. These interplays may differ from segment to segment, thus, the microenvironment of enteric neurons could be considered strictly regional. The goal of this review is to summarize the main tissue components and molecular factors, such as enteric glia cells, interstitial cells of Cajal, gut vasculature, intestinal epithelium, gut microbiota, immune cells, enteroendocrine cells, pro-oxidants, antioxidant molecules and extracellular matrix, which create and determine a gut region-dependent neuronal environment in diabetes.
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Affiliation(s)
- Mária Bagyánszki
- Department of Physiology, Anatomy and Neuroscience, Faculty of Science and Informatics, University of Szeged, Szeged H-6726, Hungary
| | - Nikolett Bódi
- Department of Physiology, Anatomy and Neuroscience, Faculty of Science and Informatics, University of Szeged, Szeged H-6726, Hungary
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Almeida PPD, Thomasi BBDM, Costa NDS, Valdetaro L, Pereira AD, Gomes ALT, Stockler-Pinto MB. Brazil Nut ( Bertholletia excelsa H.B.K) Retards Gastric Emptying and Modulates Enteric Glial Cells in a Dose-Dependent Manner. JOURNAL OF THE AMERICAN NUTRITION ASSOCIATION 2022; 41:157-165. [PMID: 33301378 DOI: 10.1080/07315724.2020.1852981] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/21/2020] [Revised: 11/04/2020] [Accepted: 11/15/2020] [Indexed: 12/16/2022]
Abstract
BACKGROUND The role of food and nutrients in the regulation of enteric glial cell functions is unclear. Some foods influence enteric neurophysiology and can affect glial cell functions that include regulation of the intestinal barrier, gastric emptying, and colonic transit. Brazil nuts are the most abundant natural source of selenium, unsaturated fatty acids, fibers, and polyphenols. OBJECTIVE The study investigated the effects of a Brazil nut-enriched diet on enteric glial cells and gastrointestinal transit. METHODS Two-month-old male Wistar rats were randomized to a standard diet (control group, CG), standard diet containing 5% (wt/wt) Brazil nut (BN5), and standard diet containing 10% (wt/wt) Brazil nut (BN10) (n = 9 per group). After eight weeks, the animals underwent constipation and gastric emptying tests to assess motility. Evaluations of colonic immunofluorescence staining for glial fibrillary acidic protein (GFAP) and myenteric ganglia area were performed. RESULTS The BN5 group showed increased weight gain while the BN10 group did not (p < 0.0001). The BN10 group showed higher gastric residue amounts compared to the other groups (p = 0.0008). The colon exhibited an increase in GFAP immunoreactivity in the BN5 group compared to that in the other groups (p = 0.0016), and the BN10 group presented minor immunoreactivity compared to the CG (p = 0.04). The BN10 group presented a minor ganglia area compared to the CG (p = 0.0155). CONCLUSION The Brazil nut-enriched diet modified the gastric residual, colonic GFAP immunoreactivity, and myenteric ganglia area after eight weeks in healthy male Wistar rats.
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Affiliation(s)
| | | | - Nathalia da Silva Costa
- Postgraduate Program in Cardiovascular Sciences, Fluminense Federal University (UFF), Niterói, RJ, Brazil
| | - Luisa Valdetaro
- Postgraduate Program in Neurosciences, Fluminense Federal University (UFF), Niterói, RJ, Brazil
| | - Aline D'Avila Pereira
- Postgraduate Program in Medical Sciences, Fluminense Federal University (UFF), Niterói, RJ, Brazil
| | - Ana Lúcia Tavares Gomes
- Postgraduate Program in Neurosciences, Fluminense Federal University (UFF), Niterói, RJ, Brazil
| | - Milena Barcza Stockler-Pinto
- Postgraduate Program in Cardiovascular Sciences, Fluminense Federal University (UFF), Niterói, RJ, Brazil
- Postgraduate Program in Nutrition Sciences, Fluminense Federal University (UFF), Niterói, RJ, Brazil
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Bhat IUH, Bhat R. Quercetin: A Bioactive Compound Imparting Cardiovascular and Neuroprotective Benefits: Scope for Exploring Fresh Produce, Their Wastes, and By-Products. BIOLOGY 2021; 10:586. [PMID: 34206761 PMCID: PMC8301140 DOI: 10.3390/biology10070586] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/31/2021] [Revised: 06/23/2021] [Accepted: 06/24/2021] [Indexed: 12/16/2022]
Abstract
Quercetin, a bioactive secondary metabolite, holds incredible importance in terms of bioactivities, which has been proved by in vivo and in vitro studies. The treatment of cardiovascular and neurological diseases by quercetin has been extensively investigated over the past decade. Quercetin is present naturally in appreciable amounts in fresh produce (fruits and vegetables). However, today, corresponding to the growing population and global demand for fresh fruits and vegetables, a paradigm shift and focus is laid towards exploring industrial food wastes and/or byproducts as a new resource to obtain bioactive compounds such as quercetin. Based on the available research reports over the last decade, quercetin has been suggested as a reliable therapeutic candidate for either treating or alleviating health issues, mainly those of cardiovascular and neurological diseases. In the present review, we have summarized some of the critical findings and hypotheses of quercetin from the available databases foreseeing its future use as a potential therapeutic agent to treat cardiovascular and neurological diseases. It is anticipated that this review will be a potential reference material for future research activities to be undertaken on quercetin obtained from fresh produce as well as their respective processing wastes/byproducts that rely on the circular concept.
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Affiliation(s)
- Irshad Ul Haq Bhat
- ERA-Chair for Food (By-) Products Valorisation Technologies (VALORTECH), Estonian University of Life Sciences, 51006 Tartu, Estonia;
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Nutraceuticals and Enteric Glial Cells. Molecules 2021; 26:molecules26123762. [PMID: 34205534 PMCID: PMC8234579 DOI: 10.3390/molecules26123762] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2021] [Revised: 06/11/2021] [Accepted: 06/15/2021] [Indexed: 12/21/2022] Open
Abstract
Until recently, glia were considered to be a structural support for neurons, however further investigations showed that glial cells are equally as important as neurons. Among many different types of glia, enteric glial cells (EGCs) found in the gastrointestinal tract, have been significantly underestimated, but proved to play an essential role in neuroprotection, immune system modulation and many other functions. They are also said to be remarkably altered in different physiopathological conditions. A nutraceutical is defined as any food substance or part of a food that provides medical or health benefits, including prevention and treatment of the disease. Following the description of these interesting peripheral glial cells and highlighting their role in physiological and pathological changes, this article reviews all the studies on the effects of nutraceuticals as modulators of their functions. Currently there are only a few studies available concerning the effects of nutraceuticals on EGCs. Most of them evaluated molecules with antioxidant properties in systemic conditions, whereas only a few studies have been performed using models of gastrointestinal disorders. Despite the scarcity of studies on the topic, all agree that nutraceuticals have the potential to be an interesting alternative in the prevention and/or treatment of enteric gliopathies (of systemic or local etiology) and their associated gastrointestinal conditions.
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Protective effects of quercetin-loaded microcapsules on the enteric nervous system of diabetic rats. Auton Neurosci 2021; 230:102759. [DOI: 10.1016/j.autneu.2020.102759] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2020] [Revised: 11/27/2020] [Accepted: 12/02/2020] [Indexed: 02/06/2023]
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Martins-Perles JVC, Bossolani GDP, Zignani I, de Souza SRG, Frez FCV, de Souza Melo CG, Barili E, de Souza Neto FP, Guarnier FA, Armani ALC, Cecchini R, Zanoni JN. Quercetin increases bioavailability of nitric oxide in the jejunum of euglycemic and diabetic rats and induces neuronal plasticity in the myenteric plexus. Auton Neurosci 2020; 227:102675. [PMID: 32474374 DOI: 10.1016/j.autneu.2020.102675] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2019] [Revised: 03/06/2020] [Accepted: 04/24/2020] [Indexed: 02/08/2023]
Abstract
Considering the antioxidant, neuroprotective, inflammatory and nitric oxide modulatory actions of quercetin, the aim of this study was to test the effect of quercetin administration in drinking water (40 mg/day/rat) on neuronal nitric oxide synthase (nNOS), vasoactive intestinal peptide (VIP), overall population of myenteric neurons (HuC/D) and nitric oxide (NO) levels in the jejunal samples from diabetic rats. Male Wistar rats were distributed into four groups (8 rats per group): euglycemic (E), euglycemic administered with quercetin (E+Q), diabetic (D) and diabetic administered with quercetin (D+Q). Rats were induced to diabetes with streptozotocin (35mg/kg/iv) and, after 120 days, the proximal jejunum were collected and processed for immunohistochemical (VIP, nNOS and HuC/D) and chemiluminescence (quantification of tissue NO levels) techniques. Diabetes mellitus reduced the number of nNOS-IR (immunoreactive) (p <0.05) and HuC/D-IR (p <0.001) neurons, however, promoted an increased morphometric area of nNOS-IR neurons (p <0.001) and VIP-IR varicosities (p <0.05). In D+Q group, neuroplasticity effects were observed on HuC/D-IR neurons, accompanied by a reduction of cell body area of neurons nNOS- and VIP-IR varicosities (p <0.05). The NO levels were increased in the E+Q (p <0.05) and D+Q group (p <0.001) compared to the control group. In conclusion, the results showed that quercetin supplementation increased the bioavailability of NO in the jejunum in euglycemic and mitigate the effects of diabetes on nNOS-IR neurons and VIP-IR varicosities in the myenteric plexus of diabetic rats.
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Affiliation(s)
| | - Gleison Daion Piovezana Bossolani
- Department of Morphological Sciences, Universidade Estadual de Maringá, Avenida Colombo, n 5790 Bloco O-33, Maringá, PR CEP 87020-900, Brazil
| | - Isabela Zignani
- Department of Morphological Sciences, Universidade Estadual de Maringá, Avenida Colombo, n 5790 Bloco O-33, Maringá, PR CEP 87020-900, Brazil
| | - Sara Raquel Garcia de Souza
- Department of Morphological Sciences, Universidade Estadual de Maringá, Avenida Colombo, n 5790 Bloco O-33, Maringá, PR CEP 87020-900, Brazil
| | - Flávia Cristina Vieira Frez
- Department of Morphological Sciences, Universidade Estadual de Maringá, Avenida Colombo, n 5790 Bloco O-33, Maringá, PR CEP 87020-900, Brazil
| | - Carina Guimarães de Souza Melo
- Department of Morphological Sciences, Universidade Estadual de Maringá, Avenida Colombo, n 5790 Bloco O-33, Maringá, PR CEP 87020-900, Brazil
| | - Emerson Barili
- Department of Statistic, Universidade Estadual de Maringá, Avenida Colombo, n 5790, Maringá, PR CEP 87020-900, Brazil
| | - Fernando Pinheiro de Souza Neto
- Department of Pathology Sciences, Universidade Estadual de Londrina (UEL), Rodovia Celso Garcia Cid
- Pr 445 Km 380, Londrina, PR CEP 86.057-970, Brazil
| | - Flávia Alessandra Guarnier
- Department of Pathology Sciences, Universidade Estadual de Londrina (UEL), Rodovia Celso Garcia Cid
- Pr 445 Km 380, Londrina, PR CEP 86.057-970, Brazil
| | - Alessandra Lourenço Cecchini Armani
- Department of Pathology Sciences, Universidade Estadual de Londrina (UEL), Rodovia Celso Garcia Cid
- Pr 445 Km 380, Londrina, PR CEP 86.057-970, Brazil
| | - Rubens Cecchini
- Department of Pathology Sciences, Universidade Estadual de Londrina (UEL), Rodovia Celso Garcia Cid
- Pr 445 Km 380, Londrina, PR CEP 86.057-970, Brazil
| | - Jacqueline Nelisis Zanoni
- Department of Morphological Sciences, Universidade Estadual de Maringá, Avenida Colombo, n 5790 Bloco O-33, Maringá, PR CEP 87020-900, Brazil.
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Piovezana Bossolani GD, Silva BT, Colombo Martins Perles JV, Lima MM, Vieira Frez FC, Garcia de Souza SR, Sehaber-Sierakowski CC, Bersani-Amado CA, Zanoni JN. Rheumatoid arthritis induces enteric neurodegeneration and jejunal inflammation, and quercetin promotes neuroprotective and anti-inflammatory actions. Life Sci 2019; 238:116956. [DOI: 10.1016/j.lfs.2019.116956] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2019] [Revised: 10/08/2019] [Accepted: 10/10/2019] [Indexed: 02/07/2023]
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MARTINS-PERLES JVC, ZIGNANI I, SOUZA SRGD, FREZ FCV, BOSSOLANI GDP, ZANONI JN. QUERCETIN SUPPLEMENTATION PREVENTS CHANGES IN THE SEROTONIN AND CASPASE-3 IMMUNOREACTIVE CELLS OF THE JEJUNUM OF DIABETIC RATS. ARQUIVOS DE GASTROENTEROLOGIA 2019; 56:405-411. [DOI: 10.1590/s0004-2803.201900000-81] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/16/2019] [Accepted: 10/14/2019] [Indexed: 12/11/2022]
Abstract
ABSTRACT BACKGROUND: Serotonin (5-HT) is present in the epithelial enterochromaffin cells (EC), mast cells of the lamina propria and enteric neurons. The 5-HT is involved in regulating motility, secretion, gut sensation, immune system and inflammation. OBJECTIVE: Evaluate the effects of diabetes and quercetin supplementation on serotoninergic cells and its cell loss by apoptosis in jejunal mucosa of streptozotocin-induced diabetic rats (STZ-rats). METHODS: Twenty-four male Wistar rats were divided into four groups: normoglycemic (C), normoglycemic supplemented with 40 mg/day quercetin (Q), diabetic (D) and diabetic supplemented with 40 mg/day quercetin (DQ). After 120 days, the jejunum was collected and fixated in Zamboni’s solution for 18 h. After obtaining cryosections, immunohistochemistry was performed to label 5-HT and caspase-3. Quantification of 5-HT and caspase-3 immunoreactive (IR) cells in the lamina propria, villi and crypts were performed. RESULTS: The diabetic condition displayed an increase of the number of 5-HT-IR cells in villi and crypts, while decreased number of these cells was observed in lamina propria in the jejunum of STZ-rats. In the diabetic animals, an increased density of apoptotic cells in epithelial villi and crypts of the jejunum was observed, whereas a decreased number of caspase-3-IR cells was observed in lamina propria. Possibly, quercetin supplementation slightly suppressed the apoptosis phenomena in the epithelial villi and crypts of the STZ-rats, however the opposite effect was observed on the 5-HT-IR cells of the lamina propria. Quercetin supplementation on healthy animals promoted few changes of serotoninergic function and apoptotic stimuli. CONCLUSION: These results suggest that quercetin supplementation mostly improved the serotonergic function affected by diabetes maybe due to antioxidant and anti-inflammatory properties of quercetin.
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Tunçdemir M, Büyükçolpan Mirzataş E, Uzun H. Renoprotective potential of quercetin in experimental diabetic nephropathy: assesing antiapoptotic and antioxidant effects. ARCHIVES OF CLINICAL AND EXPERIMENTAL MEDICINE 2018. [DOI: 10.25000/acem.452530] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
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Chen J, Gu H, Wurster RD, Cheng Z. Baroreflex Control of Heart Rate in Mice Overexpressing Human SOD1: Functional Changes in Central and Vagal Efferent Components. Neurosci Bull 2018; 35:91-97. [PMID: 30460537 PMCID: PMC6357281 DOI: 10.1007/s12264-018-0302-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2018] [Accepted: 08/06/2018] [Indexed: 12/16/2022] Open
Abstract
Excessive reactive oxygen species (ROS) (such as the superoxide radical) are commonly associated with cardiac autonomic dysfunctions. Though superoxide dismutase 1 (SOD1) overexpression may protect against ROS damage to the autonomic nervous system, superoxide radical reduction may change normal physiological functions. Previously, we demonstrated that human SOD1 (hSOD1) overexpression does not change baroreflex bradycardia and tachycardia but rather increases aortic depressor nerve activity in response to arterial pressure changes in C57B6SJL-Tg (SOD1)2 Gur/J mice. Since the baroreflex arc includes afferent, central, and efferent components, the objective of this study was to determine whether hSOD1 overexpression alters the central and vagal efferent mediation of heart rate (HR) responses. Our data indicate that SOD1 overexpression decreased the HR responses to vagal efferent nerve stimulation but did not change the HR responses to aortic depressor nerve (ADN) stimulation. Along with the previous study, we suggest that SOD1 overexpression preserves normal baroreflex function but may differentially alter the functions of the ADN, vagal efferents, and central components. While SOD1 overexpression likely enhanced ADN function and the central mediation of bradycardia, it decreased vagal efferent control of HR.
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Affiliation(s)
- Jin Chen
- Division of Neuroscience and Division of Metabolic and Cardiovascular Sciences, Burnett School of Biomedical Sciences, College of Medicine, University of Central Florida, Orlando, FL, 32816, USA
| | - He Gu
- Division of Neuroscience and Division of Metabolic and Cardiovascular Sciences, Burnett School of Biomedical Sciences, College of Medicine, University of Central Florida, Orlando, FL, 32816, USA
| | - Robert D Wurster
- Department of Cellular and Molecular Physiology, Stritch School of Medicine, Loyola University, Maywood, IL, 60153, USA
| | - Zixi Cheng
- Division of Neuroscience and Division of Metabolic and Cardiovascular Sciences, Burnett School of Biomedical Sciences, College of Medicine, University of Central Florida, Orlando, FL, 32816, USA.
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Meldgaard T, Olesen SS, Farmer AD, Krogh K, Wendel AA, Brock B, Drewes AM, Brock C. Diabetic Enteropathy: From Molecule to Mechanism-Based Treatment. J Diabetes Res 2018; 2018:3827301. [PMID: 30306092 PMCID: PMC6165592 DOI: 10.1155/2018/3827301] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/06/2018] [Accepted: 08/13/2018] [Indexed: 12/19/2022] Open
Abstract
The incidence of the micro- and macrovascular complications of diabetes is rising, mirroring the increase in the worldwide prevalence. Arguably, the most common microvascular complication is neuropathy, leading to deleterious changes in both the structure and function of neurons. Amongst the various neuropathies with the highest symptom burden are those associated with alterations in the enteric nervous system, referred to as diabetic enteropathy. The primary aim of this review is to provide a contemporaneous summary of pathophysiology of diabetic enteropathy thereby allowing a "molecule to mechanism" approach to treatment, which will include 4 distinct aspects. Firstly, the aim is to provide an overview of the diabetes-induced structural remodelling, biochemical dysfunction, immune-mediated alterations, and inflammatory properties of the enteric nervous system and associated structures. Secondly, the aim is to provide a synopsis of the clinical relevance of diabetic enteropathy. Thirdly, the aim is to discuss the various patient-reported outcome measures and the objective modalities for evaluating dysmotility, and finally, the aim is to outline the clinical management and different treatment options that are available. Given the burden of disease that diabetic enteropathy causes, earlier recognition is needed allowing prompt investigation and intervention, which may lead to improvements in quality of life for sufferers.
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Affiliation(s)
- Theresa Meldgaard
- Mech-Sense, Department of Clinical Medicine, Aalborg University, Department of Gastroenterology & Hepatology, Aalborg University Hospital, Mølleparkvej 4, 9000 Aalborg, Denmark
| | - Søren Schou Olesen
- Mech-Sense, Department of Clinical Medicine, Aalborg University, Department of Gastroenterology & Hepatology, Aalborg University Hospital, Mølleparkvej 4, 9000 Aalborg, Denmark
| | - Adam D. Farmer
- Centre for Digestive Diseases, Blizard Institute of Cell & Molecular Science, Wingate Institute of Neurogastroenterology, Barts and the London School of Medicine & Dentistry, Queen Mary University of London, London, 4 Newark Street, London E1 2AT, UK
- Department of Gastroenterology, University Hospitals of North Midlands, Stoke-on-Trent, Staffordshire ST4 6QJ, UK
| | - Klaus Krogh
- Department of Hepatology and Gastroenterology, Aarhus University Hospital, Palle Juul Jensens Boulevard, 8200 Aarhus N, Denmark
| | - Anne Astrid Wendel
- Mech-Sense, Department of Clinical Medicine, Aalborg University, Department of Gastroenterology & Hepatology, Aalborg University Hospital, Mølleparkvej 4, 9000 Aalborg, Denmark
| | - Birgitte Brock
- Steno Diabetes Center Copenhagen, The Capital Region of Denmark, Niels Steensens Vej 2-4, Building: NSK, 2820 Gentofte, Denmark
| | - Asbjørn Mohr Drewes
- Mech-Sense, Department of Clinical Medicine, Aalborg University, Department of Gastroenterology & Hepatology, Aalborg University Hospital, Mølleparkvej 4, 9000 Aalborg, Denmark
| | - Christina Brock
- Mech-Sense, Department of Clinical Medicine, Aalborg University, Department of Gastroenterology & Hepatology, Aalborg University Hospital, Mølleparkvej 4, 9000 Aalborg, Denmark
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