Adrian A. M. Masclee

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Tryptophan is the precursor of a wide array of metabolites, which are involved in a variety of aspects of human nutrition and metabolism. Accumulating evidence suggests a role of tryptophan metabolites, especially serotonin (5-hydroxytryptamin) in intestinal (patho) physiology, although mechanisms of action are still poorly understood. Alterations of(More)
Background:Activation of the ileal brake, by infusing lipid directly into the distal part of the small intestine, alters gastrointestinal (GI) motility and inhibits food intake. The ileal brake effect on eating behavior of the other macronutrients is currently unknown.Objective:The objective of this study was to investigate the effects of ileal infusion of(More)
Irritable bowel syndrome (IBS) consists of various subtypes. It is not known whether these subtypes share a common pathophysiology. Evaluation of motor and sensory function of the rectum using a barostat may help to explore a common pathophysiological background or differences in pathophysiology in subtypes of IBS. We have evaluated compliance, tone and(More)
Diabetes mellitus is a chronic disease requiring lifelong medical attention. With hundreds of millions suffering worldwide, and a rapidly rising incidence, diabetes mellitus poses a great burden on healthcare systems. Recent studies investigating the underlying mechanisms involved in disease development in diabetes point to the role of the dys-regulation of(More)
Irritable bowel syndrome (IBS) is a common functional gastrointestinal disorder, characterized by recurrent abdominal pain or discomfort in combination with disturbed bowel habits in the absence of identifiable organic cause. Visceral hypersensitivity has emerged as a key hypothesis in explaining the painful symptoms in IBS and has been proposed as a(More)
The results of ambulatory 24-h esophageal pH monitoring in 67 patients with gastroesophageal reflux symptoms (endoscopic esophagitis, n = 44; normal endoscopy, n = 23) were compared with those of 27 normal subjects without reflux symptoms. Patients with reflux symptoms had significantly increased gastroesophageal reflux compared with normal subjects. Acid(More)
With the rising prevalence of obesity and related health problems increases, there is increased interest in the gastrointestinal system as a possible target for pharmacological or food-based approaches to weight management. Recent studies have shown that under normal physiological situations undigested nutrients can reach the ileum, and induce activation of(More)
BACKGROUND Laparoscopic Nissen fundoplication effectively reduces acid reflux and reflux symptoms. Little is known about the effect on reflux mechanisms, especially on transient lower oesophageal sphincter relaxations (TLOSRs). METHODS Twenty-seven patients were studied prospectively before and after laparoscopic Nissen fundoplication, by simultaneous(More)
PURPOSE Plant sterol (PS)-enriched food products are known to reduce plasma cholesterol concentrations by inhibiting the absorption of dietary and biliary cholesterol. The physiological responses induced by food intake in the gastrointestinal tract are all important factors in determining the overall effect of PS. The aim of this study was therefore to(More)
BACKGROUND In our department, we routinely use a combined exocrine-endocrine function test to evaluate the pancreatic function in chronic pancreatitis i.e. urinary para amino benzoic acid (PABA) recovery and pancreatic polypeptide secretion in response to a meal and glucose tolerance test. AIM To study the relationship between changes in morphology and(More)