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Jan Tack

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https://www.readbyqxmd.com/read/29099093/functional-dyspepsia
#1
REVIEW
Paul Enck, Fernando Azpiroz, Guy Boeckxstaens, Sigrid Elsenbruch, Christine Feinle-Bisset, Gerald Holtmann, Jeffrey M Lackner, Jukka Ronkainen, Michael Schemann, Andreas Stengel, Jan Tack, Stephan Zipfel, Nicholas J Talley
Functional dyspepsia is one of the most prevalent functional gastrointestinal disorders. Functional dyspepsia comprises three subtypes with presumed different pathophysiology and aetiology: postprandial distress syndrome (PDS), epigastric pain syndrome (EPS) and a subtype with overlapping PDS and EPS features. Functional dyspepsia symptoms can be caused by disturbed gastric motility (for example, inadequate fundic accommodation or delayed gastric emptying), gastric sensation (for example, sensations associated with hypersensitivity to gas and bloating) or gastric and duodenal inflammation...
November 3, 2017: Nature Reviews. Disease Primers
https://www.readbyqxmd.com/read/29037470/pathophysiology-of-gastroesophageal-reflux-disease
#2
Jan Tack, John E Pandolfino
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...
October 13, 2017: Gastroenterology
https://www.readbyqxmd.com/read/29026591/irritable-bowel-syndrome-diagnosis-and-management-a-simplified-algorithm-for-clinical-practice
#3
REVIEW
Paul Moayyedi, Fermín Mearin, Fernando Azpiroz, Viola Andresen, Giovanni Barbara, Maura Corsetti, Anton Emmanuel, A Pali S Hungin, Peter Layer, Vincenzo Stanghellini, Peter Whorwell, Frank Zerbib, Jan Tack
BACKGROUND: Effective management of irritable bowel syndrome (IBS), a common functional gastrointestinal disorder, can be challenging for physicians because of the lack of simple diagnostic tests and the wide variety of treatment approaches available. OBJECTIVE: The objective of this article is to outline a simple algorithm for day-to-day clinical practice to help physicians navigate key stages to reaching a positive IBS diagnosis and guidance on how to prioritise the use of specific management strategies...
October 2017: United European Gastroenterology Journal
https://www.readbyqxmd.com/read/29018070/hypothermic-oxygenated-machine-perfusion-hope-for-orthotopic-liver-transplantation-of-human-liver-allografts-from-extended-criteria-donors-ecd-in-donation-after-brain-death-dbd-a-prospective-multicentre-randomised-controlled-trial-hope-ecd-dbd
#4
Zoltan Czigany, Wenzel Schöning, Tom Florian Ulmer, Jan Bednarsch, Iakovos Amygdalos, Thorsten Cramer, Xavier Rogiers, Irinel Popescu, Florin Botea, Jiří Froněk, Daniela Kroy, Alexander Koch, Frank Tacke, Christian Trautwein, Rene H Tolba, Marc Hein, Ger H Koek, Cornelis H C Dejong, Ulf Peter Neumann, Georg Lurje
INTRODUCTION: Orthotopic liver transplantation (OLT) has emerged as the mainstay of treatment for end-stage liver disease. In an attempt to improve the availability of donor allografts and reduce waiting list mortality, graft acceptance criteria were extended increasingly over the decades. The use of extended criteria donor (ECD) allografts is associated with a higher incidence of primary graft non-function and/or delayed graft function. As such, several strategies have been developed aiming at reconditioning poor quality ECD liver allografts...
October 10, 2017: BMJ Open
https://www.readbyqxmd.com/read/28950821/modelling-bronchopulmonary-dysplasia-in-animals-arguments-for-the-preterm-rabbit-model
#5
Thomas Salaets, Andre Gie, Bieke Tack, Jan Deprest, Jaan Toelen
Bronchopulmonary dysplasia (BPD) remains a frequent and disabling consequence of preterm birth, despite the recent advances in neonatal intensive care. There is a need to further improve outcomes and many novel therapeutic or preventive strategies are therefore investigated in animal models. We discuss in this review the aspects of human BPD pathophysiology and phenotype, which ideally should be mimicked by an animal model for this disease. Prematurity remains the common denominator in the heterogeneous spectrum of human BPD, and preterm animal models thus have a clear translational advantage...
September 26, 2017: Current Pharmaceutical Design
https://www.readbyqxmd.com/read/28932680/brain-responses-to-vestibular-pain-and-its-anticipation-in-women-with-genito-pelvic-pain-penetration-disorder
#6
Els Pazmany, Huynh Giao Ly, Leen Aerts, Michiko Kano, Sophie Bergeron, Johan Verhaeghe, Ronald Peeters, Jan Tack, Patrick Dupont, Paul Enzlin, Lukas Van Oudenhove
OBJECTIVE: In DSM-5, pain-related fear during anticipation of vaginal penetration is a diagnostic criterion of Genito-Pelvic Pain/Penetration Disorder (GPPPD). We aimed to investigate subjective and brain responses during anticipatory fear and subsequent induction of vestibular pain in women with GPPPD. METHODS: Women with GPPPD (n = 18) and age-matched healthy controls (HC) (n = 15) underwent fMRI scanning during vestibular pain induction at individually titrated pain threshold after a cued anticipation period...
2017: NeuroImage: Clinical
https://www.readbyqxmd.com/read/28925989/development-of-a-symptom-focused-patient-reported-outcome-measure-for-functional-dyspepsia-the-functional-dyspepsia-symptom-diary-fdsd
#7
Fiona Taylor, Sophie Higgins, Robyn T Carson, Sonya Eremenco, Catherine Foley, Brian E Lacy, Henry P Parkman, David S Reasner, Alan L Shields, Jan Tack, Nicholas J Talley
OBJECTIVES: The Functional Dyspepsia Symptom Diary (FDSD) was developed to address the lack of symptom-focused, patient-reported outcome (PRO) measures designed for use in functional dyspepsia (FD) patients and meeting Food and Drug Administration recommendations for PRO instrument development. METHODS: Concept elicitation interviews were conducted with FD participants to identify symptoms important and relevant to FD patients. A preliminary version of the FDSD was constructed, then completed by FD participants on an electronic device in cognitive interviews to evaluate the readability, comprehensibility, relevance, and comprehensiveness of the FDSD, and to preliminarily evaluate its measurement properties...
September 19, 2017: American Journal of Gastroenterology
https://www.readbyqxmd.com/read/28832359/functional-dyspepsia-and-gastroparesis
#8
Jan Tack, Florencia Carbone
PURPOSE OF REVIEW: This review summarizes recent progress in the epidemiology, pathophysiology and treatment of functional dyspepsia and gastroparesis. RECENT FINDINGS: The definition of functional dyspepsia and its subgroups has been revised in the recent Rome IV consensus. In gastroparesis, the symptom pattern and its similarities and differences from functional dyspepsia have been a focus of recent research. In functional dyspepsia, pathophysiological research continued to evaluate gastric sensorimotor dysfunctions, but low-grade inflammatory changes and loss of mucosal integrity in the duodenum is a new topic of intense research...
November 2017: Current Opinion in Gastroenterology
https://www.readbyqxmd.com/read/28825895/live-calcium-and-mitochondrial-imaging-in-the-enteric-nervous-system-of-parkinson-patients-and-controls
#9
An-Sofie Desmet, Carla Cirillo, Jan Tack, Wim Vandenberghe, Pieter Vanden Berghe
Parkinson's disease (PD) is a neurodegenerative disease with motor and non-motor symptoms, including constipation. Therefore, several studies have investigated the gastrointestinal tract, and more specifically the enteric nervous system (ENS), in search of an early biomarker of PD. Besides α-synuclein aggregation, mitochondrial dysfunction and dysregulation of intracellular Ca(2+) concentration probably contribute to the pathogenesis of PD. Here we assessed neuronal and mitochondrial functioning in primary enteric neurons of PD patients and their healthy partners as controls...
August 21, 2017: ELife
https://www.readbyqxmd.com/read/28814481/plausibility-criteria-for-putative-pathophysiological-mechanisms-in-functional-gastrointestinal-disorders-a-consensus-of-experts
#10
Jan Tack, Maura Corsetti, Michael Camilleri, Eamonn Mm Quigley, Magnus Simren, Hidekazu Suzuki, Nicholas J Talley, Hans Tornblom, Lukas Van Oudenhove
BACKGROUND AND AIMS: The functional gastrointestinal disorders (FGIDs) are extremely common conditions associated with a considerable personal, social and health economic burden. Managing FGIDs in clinical practice is challenging because of the uncertainty of symptom-based diagnosis, the high frequency of overlap between these conditions and the limited efficacy of available therapies. It has often been argued that successful drug development and management of FGIDs requires knowledge of the underlying pathophysiology...
August 16, 2017: Gut
https://www.readbyqxmd.com/read/28760384/efficacy-and-safety-of-relamorelin-in-diabetics-with-symptoms-of-gastroparesis-a-randomized-placebo-controlled-study
#11
Michael Camilleri, Richard W McCallum, Jan Tack, Sharon C Spence, Keith Gottesdiener, Fred T Fiedorek
BACKGROUND & AIMS: Gastroparesis is a complication of diabetes with few treatment options. Relamorelin (also referred to as RM-131) is a selective, prokinetic agonist of ghrelin. We aimed to evaluate the efficacy of relamorelin on symptoms and gastric emptying (GE) in a 12-week, phase 2B study of diabetic patients with moderate to severe gastroparesis symptoms (DG). METHODS: We performed a study of 393 patients with DG (37.7% male; 9.9% with type 1 diabetes; median age, 58...
November 2017: Gastroenterology
https://www.readbyqxmd.com/read/28731350/gastric-and-duodenal-ethanol-concentrations-after-intake-of-alcoholic-beverages-in-postprandial-conditions
#12
Jari Rubbens, Danny Riethorst, Joachim Brouwers, Kris Wolfs, Erwin Adams, Jan Tack, Patrick Augustijns
INTRODUCTION: This study determined intraluminal ethanol concentrations (stomach and duodenum) in fed healthy volunteers after the consumption of common alcoholic beverages (beer, wine and whisky). The results of this study were compared with a previous study in fasted volunteers. MATERIALS AND METHODS: Five healthy volunteers were recruited in a cross-over study. The fed state was simulated by ingestion of 250 mL of Nutridrink Compact® Neutral. Volunteers subsequently consumed two standard units of beer (Stella Artois®, 500 mL, 5...
July 21, 2017: Molecular Pharmaceutics
https://www.readbyqxmd.com/read/28621952/gastrointestinal-and-systemic-disposition-of-diclofenac-under-fasted-and-fed-state-conditions-supporting-the-evaluation-of-in-vitro-predictive-tools
#13
Jens Van Den Abeele, Ronald Schilderink, FElix Schneider, Raf Mols, Mans Minekus, Werner Weitschies, Joachim Brouwers, Jan Tack, Patrick Augustijns
This study aimed to gain further insight into the gastrointestinal disposition of the weakly acidic BCS Class II drug diclofenac and the implications for systemic drug exposure in humans under fasted and fed state conditions. For this purpose, gastrointestinal and blood samples were collected from healthy volunteers after oral intake of a commercially available tablet of the potassium salt of diclofenac (i.e. Cataflam®) in different prandial states. Subsequently, these in vivo data served as a reference for the evaluation of in vitro tools with different levels of complexity, i...
June 16, 2017: Molecular Pharmaceutics
https://www.readbyqxmd.com/read/28591618/exploring-drug-solubility-in-fasted-human-intestinal-fluid-aspirates-impact-of-inter-individual-variability-sampling-site-and-dilution
#14
Mariangeles Pérez de la Cruz-Moreno, Consuelo Montejo, Antonio Aguilar-Ros, Walthère Dewe, Benoît Beck, Jef Stappaerts, Jan Tack, Patrick Augustijns
One of the main factors defining intestinal drug absorption is the solubility of the compound in the gastrointestinal environment. This study reports the solubility of a series of 27 commonly used acidic, neutral and basic drugs in human intestinal fluid samples collected from the duodenum or jejunum of healthy volunteers under fasted state conditions. The interindividual variability as well as the impact of factors such as pH, sampling site and bile salts on the solubility in human intestinal fluids was investigated...
August 7, 2017: International Journal of Pharmaceutics
https://www.readbyqxmd.com/read/28529164/white-paper-aga-functional-dyspepsia
#15
Nimish B Vakil, Colin W Howden, Paul Moayyedi, Jan Tack
No abstract text is available yet for this article.
May 18, 2017: Clinical Gastroenterology and Hepatology
https://www.readbyqxmd.com/read/28450167/gastrointestinal-behavior-of-itraconazole-in-humans-part-2-the-effect-of-intraluminal-dilution-on-the-performance-of-a-cyclodextrin-based-solution
#16
Philippe Berben, Raf Mols, Joachim Brouwers, Jan Tack, Patrick Augustijns
Hydroxypropyl-β-cyclodextrin (HP-β-CD) is known to enable absorption of the lipophilic drug itraconazole. Since the interaction between HP-β-CD and itraconazole is characterized by a non-lineair, AP-type phase-solubility diagram, the present study aimed to investigate the influence of intraluminal dilution (water intake) on the behavior and performance of an orally administered cyclodextrin-based solution of itraconazole. Subsequently, the in vivo behavior was simulated by combining in vitro dilution with permeation assessment...
April 24, 2017: International Journal of Pharmaceutics
https://www.readbyqxmd.com/read/28414135/gastrointestinal-behavior-of-itraconazole-in-humans-part-1-supersaturation-from-a-solid-dispersion-and-a-cyclodextrin-based-solution
#17
Joachim Brouwers, Sophie Geboers, Raf Mols, Jan Tack, Patrick Augustijns
This study evaluated the fasted state gastrointestinal behavior of the lipophilic drug itraconazole, orally administered to healthy volunteers as either a solid dispersion (Sporanox(®) capsules) or a cyclodextrin-based solution (Sporanox(®) solution). Following intake of the drug products, gastric and duodenal fluids were aspirated and analyzed for itraconazole concentration, total content and solubilizing capacity. Release of itraconazole from the solid dispersion generated high and metastable supersaturated levels in the stomach, but the dissolved fraction in the duodenum remained extremely low (median 2...
April 13, 2017: International Journal of Pharmaceutics
https://www.readbyqxmd.com/read/28392455/the-effect-of-sparkling-water-on-intraluminal-formulation-behavior-and-systemic-drug-performance
#18
Jens Van Den Abeele, Joachim Brouwers, Eveline Deloose, Jan Tack, Patrick Augustijns
In the context of mediating intra- and interindividual variability in systemic drug exposure after oral drug administration, this small-scale, crossover study aimed to investigate the effect of drug intake with sparkling water on fasted state gastric motor function and subsequent (variability in) intraluminal and systemic drug disposition. For this purpose, healthy human volunteers were asked to ingest a conventional paracetamol tablet with either tap or sparkling water, after which antroduodenal motility and intraluminal and systemic drug disposition were monitored as a function of time...
April 7, 2017: Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/28366423/glp-1-levels-predict-mortality-in-patients-with-critical-illness-as-well-as-end-stage-renal-disease
#19
Corinna Lebherz, Georg Schlieper, Julia Möllmann, Florian Kahles, Marvin Schwarz, Jan Brünsing, Nada Dimkovic, Alexander Koch, Christian Trautwein, Jürgen Flöge, Nikolaus Marx, Frank Tacke, Michael Lehrke
BACKGROUND: Glucagon-like peptide 1 (GLP-1) is an incretin hormone, which stimulates glucose-dependent insulin secretion from the pancreas and holds immune-regulatory properties. A marked increase of GLP-1 has been found in critically ill patients. This study was performed to elucidate the underlying mechanism and evaluate its prognostic value. METHODS: GLP-1 plasma levels were determined in 3 different patient cohorts: 1) critically ill patients admitted to our intensive care unit (n = 215); 2) patients with chronic kidney disease on hemodialysis (n = 173); and 3) a control group (no kidney disease, no acute inflammation, n = 105)...
July 2017: American Journal of Medicine
https://www.readbyqxmd.com/read/28336550/the-effect-of-intravenous-corticotropin-releasing-hormone-administration-on-esophageal-sensitivity-and-motility-in-health
#20
Charlotte Broers, Chloé Melchior, Lukas Van Oudenhove, Tim Vanuytsel, Brecht Van Houtte, Charlotte Scheerens, Nathalie Rommel, Jan Tack, Ans Pauwels
Esophageal hypersensitivity is important in gastroesophageal reflux disease (GERD) patients who are refractory to acid-suppressive therapy. Stress affects visceral sensitivity and exacerbates heartburn in GERD. Peripheral CRH is a key mediator of the gut stress response. We hypothesize that CRH increases esophageal sensitivity and alters esophageal motility in health. Esophageal sensitivity to thermal, mechanical, electrical, and chemical stimuli was assessed in 14 healthy subjects after administration of placebo or CRH (100 μg iv)...
May 1, 2017: American Journal of Physiology. Gastrointestinal and Liver Physiology
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